LÍNEAS DE INVESTIGACIÓN
Adquisición, modelamiento y extracción de los datos
Desarrollo de nuevas técnicas que mejoren la capacidad de obtención e interpretación de datos complejos, integrando sus múltiples formatos y estandarizando herramientas para extraer información desde ellos.
Almacenamiento, recuperación y privacidad
Estudio de nuevos algoritmos, estructuras de datos y heurísticas para implementar de manera eficiente y segura sistemas de almacenamiento de grandes volúmenes de datos complejos.
Minería, aprendizaje y visualización
Desarrollo de nuevas técnicas que mejoren la capacidad de obtención e interpretación de datos complejos, integrando sus múltiples formatos y estandarizando herramientas para extraer información desde ellos.
Infraestructura de datos públicos
Generación de las bases de una infraestructura de información robusta que aproveche los datos públicos para disponibilizarlos en plataformas que garanticen su transparencia y trazabilidad.
Efectos sociopolíticos de los datos
Buscamos avanzar en la comprensión de la generación, usos e impacto de los datos en la sociedad, a través de la interacción entre ciencia política, comunicaciones y ciencias de la computación.
Publicaciones
Publications for 2025
Displaying 81 publication(s) for 2025
Reducing urban speed limits decreases work-related traffic injury severity: Evidence from Santiago, Chile
Authors: Matías Toro, Eduardo Graells-Garrido, Gabriel Mansilla et al.
Year: 2025Source: Travel Behaviour and Society
Cross-Lingual Cross-Domain Transfer Learning for Rumor Detection
Authors: Marcelo Mendoza, Mauricio Solar, Eliana Providel
Year: 2025Source: Future Internet
This study introduces a novel method that merges propagation-based transfer learning with word embeddings for rumor detection. This approach aims to use data from languages with abundant resources to ...
Querying Graph Data: Where We Are and Where To Go
Authors: Domagoj Vrgoč, Leonid Libkin, Wim Martens et al.
Year: 2025
CORE+: A Complex Event Recognition Engine in C++
Authors: Cristian Riveros, Stijn Vansummeren, Vicente Calisto et al.
Year: 2025
Rel: A Programming Language for Relational Data
Authors: Domagoj Vrgoč, Leonid Libkin, Wim Martens et al.
Year: 2025
Editorial
Authors: Bárbara Poblete, Makoto P. Kato, H. Liu et al.
Year: 2025
This editorial celebrates the first issue of the Information Retrieval Research Journal, IRRJ.
Using publicly available data for predicting socioeconomic values in urban context
Authors: Juan Reutter, Mario Miguel Ojeda
Year: 2025Source: Computational Urban Science
Abstract Urban transportation networks are recognized for their pivotal role in forecasting city indicators and facilitating efficient planning and management. However, despite the increase of methodo...
Complex Event Recognition under Time Constraints: Towards a Formal Framework for Efficient Query Evaluation
Authors: Cristian Riveros, Jaime García
Year: 2025Source: Proceedings of the ACM on Management of Data
Complex Event Recognition (CER) establishes a relevant solution for processing streams of events, giving users timely information. CER systems detect patterns in real-time, producing complex events an...
Explaining <i>k</i> -Nearest Neighbors: Abductive and Counterfactual Explanations
Authors: Pablo Barceló, Bernardo Subercaseaux, Miguel Romero et al.
Year: 2025Source: Proceedings of the ACM on Management of Data
Despite the wide use of k -Nearest Neighbors as classification models, their explainability properties remain poorly understood from a theoretical perspective. While nearest neighbors classifiers offe...
Characterizing Knowledge Manipulation in a Russian Wikipedia Fork
Authors: Ricardo Baeza-Yates, Diego Sáez-Trumper, Pablo Aragón et al.
Year: 2025Source: Proceedings of the International AAAI Conference on Web and Social Media
Wikipedia is powered by MediaWiki, a free and open-source software that is also the infrastructure for many other wiki-based online encyclopedias. These include the recently launched website Ruwiki, w...
SPLASH-SegFormer Pipeline: A Transformer-Based Approach for High-Resolution and Low-Cost Laser Scanner Seafloor Mapping
Authors: Hans Löbel, Javiera Fuentes-Guíñez, Giancarlo Troni
Year: 2025Source: IEEE Robotics and Automation Letters
Information Integrity about Climate Science: A Systematic Review
Authors: Sebastián Valenzuela, Philip N. Howard, Jusen Asuka et al.
Year: 2025
A high-level précis of this Synthesis Report can be found in the Summary for Policymakers report, Facts, Fakes, and Climate Science. The human response to the climate crisis is being obstructed and d...
Facts, Fakes, and Climate Science: Recommendations for Improving Information Integrity about Climate Science
Authors: Sebastián Valenzuela, Philip N. Howard, Jusen Asuka et al.
Year: 2025
This Summary for Policymakers provides a high-level précis of the Synthesis Report, Information Integrity about Climate Science: A Systematic Review. The human response to the climate crisis is being...
Evaluating the Performance of Large Language Models on the CONACEM Anesthesiology Certification Exam: A Comparison with Human Participants
Authors: Marcelo Mendoza, Andrés Neyem, Fernando Altermatt et al.
Year: 2025Source: Applied Sciences
Large Language Models (LLMs) have demonstrated strong performance on English-language medical exams, but their effectiveness in non-English, high-stakes environments is less understood. This study ben...
Regulatory Initiatives in AI
Authors: Marcelo Mendoza, Claudia López, Gabriela Arriagada-Bruneau
Year: 2025Source: CRC Press eBooks
Explainable Artificial Intelligence
Authors: Marcelo Mendoza, Claudia López, Gabriela Arriagada-Bruneau
Year: 2025Source: CRC Press eBooks
What is AI Ethics?
Authors: Marcelo Mendoza, Claudia López, Gabriela Arriagada-Bruneau
Year: 2025Source: CRC Press eBooks
Perspectives and Challenges
Authors: Marcelo Mendoza, Claudia López, Gabriela Arriagada-Bruneau
Year: 2025Source: CRC Press eBooks
Fairness, Accountability, and Transparency in AI
Authors: Marcelo Mendoza, Claudia López, Gabriela Arriagada-Bruneau
Year: 2025Source: CRC Press eBooks
Beyond the Mainstream: Sustainability and the Replicability Crisis
Authors: Marcelo Mendoza, Claudia López, Gabriela Arriagada-Bruneau
Year: 2025Source: CRC Press eBooks
Bias in Al
Authors: Marcelo Mendoza, Claudia López, Gabriela Arriagada-Bruneau
Year: 2025Source: CRC Press eBooks
NLP and Representational Bias
Authors: Marcelo Mendoza, Claudia López, Gabriela Arriagada-Bruneau
Year: 2025Source: CRC Press eBooks
Transformers and Generative AI
Authors: Marcelo Mendoza, Claudia López, Gabriela Arriagada-Bruneau
Year: 2025Source: CRC Press eBooks
Benefits and Risks of LLMs
Authors: Marcelo Mendoza, Claudia López, Gabriela Arriagada-Bruneau
Year: 2025Source: CRC Press eBooks
Ethics in Artificial Intelligence and Information Technologies
Authors: Marcelo Mendoza, Claudia López, Gabriela Arriagada-Bruneau
Year: 2025
Visual Transformers and the Rise of Multimodality
Authors: Marcelo Mendoza, Claudia López, Gabriela Arriagada-Bruneau
Year: 2025Source: CRC Press eBooks
A Sociotechnical Approach to Integrate Ethics into AI Projects
Authors: Marcelo Mendoza, Claudia López, Gabriela Arriagada-Bruneau
Year: 2025Source: CRC Press eBooks
Practical Adaptive Dynamic Bitvectors
Authors: Gonzalo Navarro
Year: 2025Source: Software Practice and Experience
ABSTRACT Introduction While operations rank and select on static bitvectors can be supported in constant time, lower bounds show that this is impossible when supporting updates; practical implementati...
Large Language Models in Crisis Informatics for Zero and Few-Shot Classification
Authors: Bárbara Poblete, Andrés Abeliuk, Cinthia Sánchez
Year: 2025Source: ACM Transactions on the Web
This article presents an exploration of the use of pre-trained Large Language Models (LLMs) for crisis classification to address labeled data dependency issues. We present a methodology that enhances ...
The Role of Organizations in Networked Mobilization: Examining the 2011 Chilean Student Movement Through The Logic of Connective Action
Authors: Denis Parra, Carolina Pérez-Arredondo, Diego Gómez-Zará
Year: 2025
Novel SIMEX algorithm for autoregressive models to estimate AGN variability
Authors: Susana Eyheramendy, Wilfredo Palma, Felipe Elorrieta et al.
Year: 2025Source: Monthly Notices of the Royal Astronomical Society
Abstract The origin of the variability in accretion disks of active galactic nuclei (AGN) is still unknown, but its behavior can be characterized by modeling the time series of optical wavelength flux...
Imitating Human Reasoning to Extract 5W1H in News
Authors: Marcelo Mendoza, Hans Löbel, Carlos Muñoz et al.
Year: 2025
15th Temporal Web Analytics Workshop (TempWeb) Overview
Authors: Ricardo Baeza-Yates, Omar Alonso, Marc Spaniol
Year: 2025
Performance of single-agent and multi-agent language models in Spanish language medical competency exams
Authors: Marcelo Mendoza, Andrés Neyem, Fernando Altermatt et al.
Year: 2025Source: BMC Medical Education
Abstract Background Large language models (LLMs) like GPT-4o have shown promise in advancing medical decision-making and education. However, their performance in Spanish-language medical contexts rema...
Elucidating Type Conversions in SQL Engines
Authors: Matías Toro, Eric Tanter, Claudio Gutiérrez et al.
Year: 2025Source: Lecture notes in computer science
The Role of Generative AI Use in 2024 Elections Worldwide
Authors: Sebastián Valenzuela, Philip N. Howard, Inga Kristina Trauthig
Year: 2025
A high-level précis of the Technical Paper can be found in the Summary for Policymakers report, Generative AI in Electoral Campaigns: Mapping Global Patterns. GenAI is being deployed in many ways dur...
Generative AI in Electoral Campaigns: Mapping Global Patterns
Authors: Sebastián Valenzuela, Philip N. Howard, Inga Kristina Trauthig
Year: 2025
This Summary for Policymakers provides a high-level précis of the Technical Paper, The Role of Generative AI Use in 2024 Elections Worldwide. GenAI is being deployed in many ways during elections, ra...
Correction: Cross-lingual hate speech detection using domain-specific word embeddings
Authors: Bárbara Poblete, Ayme Arango Monnar, Jorge Perez Rojas
Year: 2025Source: PLoS ONE
[This corrects the article DOI: 10.1371/journal.pone.0306521.].
Worst-Case-Optimal Joins on Graphs with Topological Relations
Authors: Aidan Hogan, Juan Reutter, Gonzalo Navarro et al.
Year: 2025
Probabilistic Explanations for Linear Models
Authors: Marcelo Arenas, Bernardo Subercaseaux, Kuldeep S. Meel
Year: 2025Source: Proceedings of the AAAI Conference on Artificial Intelligence
Formal XAI is an emerging field that focuses on providing explanations with mathematical guarantees for the decisions made by machine learning models. A significant amount of work in this area is cent...
Repetitiveness Measures Based on String Morphisms
Authors: Gonzalo Navarro, Cristian Urbina
Year: 2025Source: Theoretical Computer Science
Advancing the Study of Political Misinformation Across Countries and Platforms—Introduction to the Special Issue
Authors: Sebastián Valenzuela, Edson C. Tandoc, Frank Esser et al.
Year: 2025Source: The International Journal of Press/Politics
The global spread of political misinformation poses serious challenges to democracies, eroding trust and distorting public discourse. However, research has largely focused on WEIRD countries—Western...
Bridging Inequality Gaps: Sustainable Journalism in the News Coverage of Education Policies
Authors: Magdalena Saldaña, Valentina Proust, Cristian Cabalín et al.
Year: 2025Source: Journalism Practice
By conducting a content analysis of 331 news stories, this study observed how six news organizations covered Chile's new school admission system (SAE) for enrolling in K-12 schools. To identify the pr...
HealthIUI: Workshop on Intelligent and Interactive Health User Interfaces
Authors: Denis Parra, Peter Brusilovsky, Shriti Raj et al.
Year: 2025
Logical Expressiveness of Graph Neural Networks on Knowledge Graphs
Authors: Pablo Barceló, Miguel Romero, İsmail İlkan Ceylan et al.
Year: 2025Source: Frontiers in artificial intelligence and applications
Graph neural networks are prominent models for representation learning over graph-structured data. While the capabilities and limitations of these models are well-understood for simple graphs, our und...
NLP modeling recommendations for restricted data availability in clinical settings
Authors: Felipe Bravo-Márquez, Jocelyn Dunstan, Fabián Villena
Year: 2025Source: BMC Medical Informatics and Decision Making
Abstract Background Clinical decision-making in healthcare often relies on unstructured text data, which can be challenging to analyze using traditional methods. Natural Language Processing (NLP) has ...
A Shopping Agent for Addressing Subjective Product Needs
Authors: Bárbara Poblete, Preetam Prabhu Srikar Dammu, Omar Alonso
Year: 2025
Dialogue on difference: Identity and political communication
Authors: Magdalena Saldaña, Sebastián Valenzuela, Khadijah Costley White et al.
Year: 2025Source: Communication Monographs
Dialogue on difference: Identity and political communication
Authors: Magdalena Saldaña, Sebastián Valenzuela, Khadijah Costley White et al.
Year: 2025Source: Carolina Digital Repository (University of North Carolina at Chapel Hill)
Constant-delay enumeration for SLP-compressed documents
Authors: Cristian Riveros, Martı́n Muñoz
Year: 2025Source: Logical Methods in Computer Science
We study the problem of enumerating results from a query over a compressed document. The model we use for compression are straight-line programs (SLPs), which are defined by a context-free grammar tha...
How Expressive are Knowledge Graph Foundation Models?
Authors: Pablo Barceló, Juan Reutter, Michael M. Bronstein et al.
Year: 2025Source: arXiv (Cornell University)
Knowledge Graph Foundation Models (KGFMs) are at the frontier for deep learning on knowledge graphs (KGs), as they can generalize to completely novel knowledge graphs with different relational vocabul...
A Comparison of Human and Machine Learning Errors in Face Recognition
Authors: Ricardo Baeza-Yates, Carlos Castillo, Marina Estévez-Almenzar
Year: 2025Source: arXiv (Cornell University)
Machine learning applications in high-stakes scenarios should always operate under human oversight. Developing an optimal combination of human and machine intelligence requires an understanding of the...
Patterns of Persistence: Studying News Repertoires Before, During, and After Covid-19
Authors: Sebastián Valenzuela, Ingrid Bachmann, Natalia Solís Valdés
Year: 2025Source: Journalism Studies
In the realm of news consumption, individuals often establish recurrent patterns, integrating diverse sources into distinct repertoires. However, these patterns can change during unprecedented events ...
Generalized straight-line programs
Authors: Gonzalo Navarro, Francisco Javier Vidal Olivares, C. Urbina
Year: 2025Source: Acta Informatica
Preface to the special issue on “Artificial Intelligence‐driven Decision Making in Health and Medicine”
Authors: Leopoldo Bertossi, Herb Kunze, Davide La Torre et al.
Year: 2025Source: International Transactions in Operational Research
Enhancing contact recommendation in social platforms through mental health awareness: Exploring Anorexia Nervosa as a case study
Authors: Ricardo Baeza-Yates, Diana Ramírez‐Cifuentes, Ana Freire et al.
Year: 2025Source: PLoS ONE
We analyze and propose a solution for the exposure of vulnerable users to harmful content during their interaction with contact recommender systems in social platforms. Our approach is dedicated to ma...
<i>Digital Journalism</i> (Studies): An Agenda for the Future
Authors: Magdalena Saldaña, Ramón Salaverría, Oscar Westlund et al.
Year: 2025Source: Digital Journalism
Digital Journalism has an important role to play in encouraging and publishing research with societal relevance that advances digital journalism studies as a field. In this article we discuss the mult...
The Causal-Effect Score in Data Management
Authors: Leopoldo Bertossi, Felipe Azua
Year: 2025Source: arXiv (Cornell University)
The Causal Effect (CE) is a numerical measure of causal influence of variables on observed results. Despite being widely used in many areas, only preliminary attempts have been made to use CE as an at...
Developing and Validating an Automatic Support System for Tumor Coding in Pathology Reports in Spanish
Authors: Jocelyn Dunstan, Fabián Villena, Matías Rojas et al.
Year: 2025Source: JCO Clinical Cancer Informatics
PURPOSE Pathology reports provide valuable information for cancer registries to understand, plan, and implement strategies to mitigate the impact of cancer. However, coding essential information from ...
Towards A Global AI Auditing Framework: Assessment and Recommendations
Authors: Marcelo Mendoza, Sebastián Valenzuela, Janaki Srinivasan et al.
Year: 2025
A high-level précis of the Synthesis Report can be found in the Summary for Policymakers Recommendations for a Global AI Auditing Framework: Summary of Standards and Features. The growing integration...
A Comunication Framework for Compositional Generation
Authors: Denis Parra, Rafael Elberg, Mircea Petrache
Year: 2025Source: arXiv (Cornell University)
Compositionality and compositional generalization--the ability to understand novel combinations of known concepts--are central characteristics of human language and are hypothesized to be essential fo...
Semantic Web and Creative AI -- A Technical Report from ISWS 2023
Authors: Aidan Hogan, Claudia d’Amato, Sebastian Rudolph et al.
Year: 2025Source: arXiv (Cornell University)
The International Semantic Web Research School (ISWS) is a week-long intensive program designed to immerse participants in the field. This document reports a collaborative effort performed by ten team...
A frustratingly easy way of extracting political networks from text
Authors: Naim Bro
Year: 2025Source: PLoS ONE
This study demonstrates the use of GPT-4 and variants, advanced language models readily accessible to many social scientists, in extracting political networks from text. This approach showcases the no...
Ehrenfeucht-Haussler Rank and Chain of Thought
Authors: Pablo Barceló, Tomasz Steifer, Alexander Kozachinskiy
Year: 2025Source: arXiv (Cornell University)
The notion of rank of a Boolean function has been a cornerstone in the theory of PAC learning, enabling quasipolynomial-time learning algorithms for polynomial-size decision trees. We present a novel ...
The Missing Link: Identifying Digital Intermediaries in E-Government
Authors: Sergio Toro, Sebastián Valenzuela, Teresa Correa et al.
Year: 2025Source: arXiv (Cornell University)
The digitalization of public administration has advanced significantly on a global scale. Many governments now view digital platforms as essential for improving the delivery of public services and fos...
Mid-Career Reflections: Climbing the Academic Ladder Without a Safety Net
Authors: Marcelo Arenas
Year: 2025Source: ACM SIGMOD Record
As I supposed everyone else did when asked by Tamer to write an article with Advice to Mid-Career Researchers, I read all the previous articles in this series to understand what this paper should be a...
Unsupervised Framing Analysis for Social Media Discourse in Polarizing Events
Authors: Hernán Sarmiento, Felipe Bravo-Márquez, Sebastián Valenzuela et al.
Year: 2025Source: ACM Transactions on the Web
This study investigates the concept of frames in the realm of online polarization, with a focus on social media platforms. The research extends the understanding of how frames—emerging, complex, and...
Foreword to the special section on 3D object retrieval 2024 symposium (3DOR2024)
Authors: Benjamín Bustos, Ivan Sipiran, Tobias Schreck et al.
Year: 2025Source: Computers & Graphics
Curcumin Improves Hippocampal Cell Bioenergetics, Redox and Inflammatory Markers, and Synaptic Proteins, Regulating Mitochondrial Calcium Homeostasis
Authors: Sebastián Valenzuela, Alfonso González, Cláudio Retamal et al.
Year: 2025Source: Neurotoxicity Research
All Your Base Are Belong to Us: Sort Polimorfismo for Proof Assistants
Authors: Eric Tanter, Kenji Maillard, Nicolas Tabareau et al.
Year: 2025Source: Proceedings of the ACM on Programming Languages
Proof assistants based on dependent type theory, such as Coq, Lean and Agda, use different universes to classify types, typically combining a predicative hierarchy of universes for computationally-rel...
When is the Computation of a Feature Attribution Method Tractable?
Authors: Pablo Barceló, Micaela Morgado, Roberto Cominetti
Year: 2025Source: arXiv (Cornell University)
Feature attribution methods have become essential for explaining machine learning models. Many popular approaches, such as SHAP and Banzhaf values, are grounded in power indices from cooperative game ...
TOI-4504: Exceptionally Large Transit Timing Variations Induced by Two Resonant Warm Gas Giants in a Three-planet System
Authors: Néstor Espinoza, Jan Eberhardt, Felipe Rojas et al.
Year: 2025Source: The Astrophysical Journal Letters
Abstract We present a joint analysis of transit timing variations (TTVs) and Doppler data for the transiting exoplanet system TOI-4504. TOI-4504 c is a warm Jupiter-mass planet that exhibits the large...
Shrec 2025: Partial Retrieval Benchmark
Authors: Benjamín Bustos, Ivan Sipiran, Silvia Biasotti et al.
Year: 2025
Correction to: The Semantic Web – ISWC 2024
Authors: Aidan Hogan, Daniel Hernández, Katja Hose et al.
Year: 2025Source: Lecture notes in computer science
14 Kg of CO2: Analyzing the Carbon Footprint and Performance of Session-Based Recommendation Algorithms
Authors: Denis Parra, Jessie Gil, Alejandro Plaza
Year: 2025Source: Communications in computer and information science
Top-<i>k</i> Document Retrieval in Compressed Space
Authors: Gonzalo Navarro, Yakov Nekrich
Year: 2025Source: Society for Industrial and Applied Mathematics eBooks
Let 𝓓 be a collection of D strings of total length n over an alphabet of size σ. We consider the so-called top-k document retrieval problem: given a short string P and an integer k, list the ident...
A Theoretical Bound which Improves the Performance of Compilation-Based Multi-Agent Path Finding
Authors: Jorge Baier, Roberto Asín‐Achá, Rodrigo López
Year: 2025Source: IEEE Access
Assessment of the acceptability, proximate properties, and product cost of amylase-enhanced mixed cassava and sweet potato syrup
Authors: Marcelo Mendoza
Year: 2025Source: Pantao, international journal of the humanities and social sciences
The variety of goods obtained from root crops, particularly cassava and sweet potatoes, is getting low, thereby affecting their sustainability. The researcher has produced a syrup by combining cassava...
Screening Dyslexia Using Visual Auditory Computer Games and Machine Learning
Authors: Ricardo Baeza-Yates, Luz Rello, Maria Rauschenberger
Year: 2025Source: IEEE Access
FairXAI -A Taxonomy and Framework for Fairness and Explainability Synergy in Machine Learning
Authors: Ricardo Baeza-Yates, Fredrik Heintz, Resmi Ramachandranpillai
Year: 2025Source: IEEE Transactions on Neural Networks and Learning Systems
Explainable artificial intelligence (XAI) and fair learning have made significant strides in various application domains, including criminal recidivism predictions, healthcare settings, toxic comment ...
Advancing AI Incidents Classification: Leveraging LLMs with Strategic Prompting
Authors: Ricardo Baeza-Yates, Yian Chen, Lana Do et al.
Year: 2025Source: Communications in computer and information science
Publications for 2024
Displaying 152 publication(s) for 2024
Probabilistic Explanations for Linear Models
Authors: Marcelo Arenas, Bernardo Subercaseaux, Kuldeep S. Meel
Year: 2024Source: arXiv (Cornell University)
Formal XAI is an emerging field that focuses on providing explanations with mathematical guarantees for the decisions made by machine learning models. A significant amount of work in this area is cent...
Clinical analogy resolution performance for foundation language models
Authors: Jocelyn Dunstan, Fabián Villena, Tamara Quiroga
Year: 2024Source: ACM Transactions on Computing for Healthcare
Using extensive data sources to create foundation language models has revolutionized the performance of deep learning-based architectures. This remarkable improvement has led to state-of-the-art resul...
Competing Frames and Melodrama: The Effects of Facebook Posts on Policy Preferences about COVID-19
Authors: Sebastián Valenzuela, Ingrid Bachmann, Daniel Halpern et al.
Year: 2024Source: Routledge eBooks
The tension between health and economic considerations regarding COVID-19 has resulted in a framing contest, in which proponents and adversaries of strong containment measures hold oppositional frames...
Glycemic Control With Layperson-Delivered Telephone Calls vs Usual Care for Patients With Diabetes
Authors: Sebastián Valenzuela, Mathew Sither, Rhonda Aubrey et al.
Year: 2024Source: JAMA Network Open
Importance Diabetes is associated with emotional distress and poor mental health, especially for individuals with low income, hindering patients’ ability to manage their condition. The health care s...
Optimization of Bias Mitigation in Word Embeddings: a Methodological Approach
Authors: Felipe Bravo-Márquez, Mayteé Zambrano
Year: 2024
A Comparative Analysis of Offensive Discourse in the 2021 Chilean Presidential Campaign on Twitter and WhatsApp
Authors: Hernán Sarmiento, Felipe Bravo-Márquez, Sebastián Valenzuela et al.
Year: 2024
Bias in Retrieval Systems
Authors: Ricardo Baeza-Yates, Shiran Dudy, Leena Murgai
Year: 2024Source: Information Retrieval
Gradual C0: Symbolic Execution for Gradual Verification
Authors: Eric Tanter, Joshua Sunshine, Jonathan Aldrich et al.
Year: 2024Source: ACM Transactions on Programming Languages and Systems
Current static verification techniques such as separation logic support a wide range of programs. However, such techniques only support complete and detailed specifications, which places an undue burd...
“<i>Your house won’t be yours anymore!</i>” Effects of Misinformation, News Use, and Media Trust on Chile’s Constitutional Referendum
Authors: Magdalena Saldaña, Sebastián Rivera, Ximena Orchard et al.
Year: 2024Source: The International Journal of Press/Politics
News consumption and voting behavior are interlinked and particularly important in elections where traditional political cleavages are not easily applicable. This relationship becomes more complex and...
Public adherence to the principles of criminal law in Chile: Shaping factors and consequences for trust in the criminal justice system
Authors: Magdalena Saldaña, Rodrigo González-Fuente, Omar A. Barriga et al.
Year: 2024Source: Política criminal
Multi-label learning on low label density sets with few examples
Authors: Benjamín Bustos, Ivan Sipiran, Tobias Schreck et al.
Year: 2024Source: Expert Systems with Applications
PD155 RedETS Horizon Scanning: Impact In The Decision-Making Process
Authors: Gonzalo Navarro, Roland Pastells‐Peiró, Maria-Dolors Estrada et al.
Year: 2024Source: International Journal of Technology Assessment in Health Care
Introduction The RedETS horizon scanning (HS) program in Spain is focused on identifying non-pharmaceutical emerging health technologies. HS is organized in three steps: (i) identification using diffe...
ML-Based Classification of Hamstring Strain Injury from Nonlinear Features of Surface Electromyography Signals
Authors: Marcelo Mendoza, Ma. Belinda C. Fidel, Gian Angelo A. Calumpang et al.
Year: 2024Source: TENCON 2021 - 2021 IEEE Region 10 Conference (TENCON)
Recommendations for a Global AI Auditing Framework: Summary of Standards and Features
Authors: Marcelo Mendoza, Sebastián Valenzuela, Janaki Srinivasan et al.
Year: 2024
This Summary for Policymakers provides a high-level précis of the Synthesis Report Towards A Global AI Auditing Framework: Assessment and Recommendations. The growing integration of artificial intell...
Report on the 14th Workshop on Temporal Web Analytics (TempWeb 2024) at WWW 2024
Authors: Ricardo Baeza-Yates, Marc Spaniol, Ómar Alonso
Year: 2024Source: ACM SIGIR Forum
The TempWeb workshop (series) is an established co-located event at The Web Conference that aims at bringing together researchers and practitioners across various domains, taking the constantly evolvi...
Adaptive Plane Reformatting for 4D Flow MRI using Deep Reinforcement Learning
Authors: Denis Parra, Cristián Tejos, Sergio Uribe et al.
Year: 2024Source: Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition
Motivation: The standard approach for plane reformatting in 4D flow MRI is manual, leading to time-consuming and user-dependent results. Goal(s): Our goal was to enhance plane reformatting in 4D flow ...
Evaluating regular path queries on compressed adjacency matrices
Authors: Gonzalo Navarro, Diego Arroyuelo, Adrián Gómez-Brandón
Year: 2024Source: The VLDB Journal
PathFinder: Returning Paths in Graph Queries
Authors: Domagoj Vrgoč, Carlos Rojas, Wim Martens et al.
Year: 2024Source: Lecture notes in computer science
Restructuring Tractable Probabilistic Circuits
Authors: Marcelo Arenas, Guy Van den Broeck, Honghua Zhang et al.
Year: 2024Source: arXiv (Cornell University)
Probabilistic circuits (PCs) is a unifying representation for probabilistic models that support tractable inference. Numerous applications of PCs like controllable text generation depend on the abilit...
Influence of regional anesthesia on fall risk in adults over 60 years
Authors: Aidan Hogan, Ursula Trinler, Paul Alfred Grützner et al.
Year: 2024Source: Clinical Biomechanics
Human-AI Coevolution
Authors: Ricardo Baeza-Yates, Dino Pedreschi, Alistair Knott et al.
Year: 2024Source: Artificial Intelligence
Static Slicing for Probabilistic Programs: An Overview
Authors: Federico Olmedo
Year: 2024Source: Lecture notes in computer science
Reducing Interpretative Ambiguity in an educational environment with ChatGPT.
Authors: Marcelo Mendoza, Miguél Nussbaum, Zvi Bekerman et al.
Year: 2024Source: Computers & Education
Enhancing commit message quality in software capstone projects with generative AI
Authors: Marcelo Mendoza, Andrés Neyem, Juan Pablo Sandoval Alcocer et al.
Year: 2024Source: SoftwareX
Towards Tractability of the Diversity of Query Answers: Ultrametrics to the Rescue
Authors: Cristian Riveros, Marcelo Arenas, Reinhard Pichler et al.
Year: 2024Source: Proceedings of the ACM on Management of Data
The set of answers to a query may be very large, potentially overwhelming users when presented with the entire set. In such cases, presenting only a small subset of the answers to the user may be pref...
Complex Event Recognition meets Hierarchical Conjunctive Queries
Authors: Cristian Riveros, Dante Pinto
Year: 2024Source: Proceedings of the ACM on Management of Data
Hierarchical conjunctive queries (HCQ) are a subclass of conjunctive queries (CQ) with robust algorithmic properties. Among others, Berkholz, Keppeler, and Schweikardt have shown that HCQ is the subcl...
Trends in the Global Information Environment: 2024 Expert Survey Results
Authors: Sebastián Valenzuela, Philip N. Howard, Sacha Altay
Year: 2024
The global information environment is under great pressure. How do experts around the world perceive the features of and threats to the information environment in the countries they study? In June 202...
Disjointed Polarization in Chile’s Enduring Crisis of Representation – ERRATUM
Authors: Juan Pablo Luna
Year: 2024Source: Latin American Politics and Society
An abstract is not available for this content. As you have access to this content, full HTML content is provided on this page. A PDF of this content is also available in through the 'Save PDF' action ...
BWBEV: A Bitwise Query Processing Algorithm for Approximate Prefix Search
Authors: Ricardo Baeza-Yates, Edleno Silva de Moura, Berg Ferreira et al.
Year: 2024Source: Journal of the Brazilian Computer Society
We tackle the challenge of conducting an approximate prefix search within datasets of strings. We explore using a bit-parallelism technique to compute the edit distance between distinct strings and il...
A Uniform Language to Explain Decision Trees
Authors: Pablo Barceló, Marcelo Arenas, Bernardo Subercaseaux et al.
Year: 2024
The formal XAI community has studied a plethora of interpretability queries aiming to understand the classifications made by decision trees. However, a more uniform understanding of what questions we ...
Streaming enumeration on nested documents
Authors: Cristian Riveros, Martín Muñoz
Year: 2024Source: ACM Transactions on Database Systems
Some of the most relevant document schemas used online, such as XML and JSON, have a nested format. In the last decade, the task of extracting data from nested documents over streams has become especi...
Computing MEMs and Relatives on Repetitive Text Collections
Authors: Gonzalo Navarro
Year: 2024Source: ACM Transactions on Algorithms
We consider the problem of computing the Maximal Exact Matches (MEMs) of a given pattern \(P[1\mathinner{.. }m]\) on a large repetitive text collection \(T[1\mathinner{.. }n]\) over an alphabet of siz...
Survey of data stories: Guidelines for data story authoring
Authors: Denis Parra, Manuela Garretón, Daniela Moyano et al.
Year: 2024Source: Information Visualization
Data stories are sequences of data facts connected through a meaningful narrative and combine data visualizations and storytelling to convey information effectively. They have gained popularity due to...
Correction: AI content detection in the emerging information ecosystem: new obligations for media and tech companies
Authors: Ricardo Baeza-Yates, David Eyers, Susan Leavy et al.
Year: 2024Source: Ethics and Information Technology
The Distributional Uncertainty of the SHAP Score in Explainable Machine Learning
Authors: Leopoldo Bertossi, Miguel Romero, Nina Pardal et al.
Year: 2024Source: Frontiers in artificial intelligence and applications
Attribution scores reflect how important the feature values in an input entity are for the output of a machine learning model. One of the most popular attribution scores is the SHAP score, which is an...
ARCHIE: Articulated Robot for Collaborative Highly Integrated Education
Authors: Marcelo Mendoza, E. E. Mendoza, Juan Saeteros et al.
Year: 2024
Merging Gradual Typing
Authors: Matías Toro, Wenjia Ye, Bruno C. d. S. Oliveira
Year: 2024Source: Proceedings of the ACM on Programming Languages
Programming language mechanisms with a type-directed semantics are nowadays common and widely used. Such mechanisms include gradual typing, type classes, implicits and intersection types with a merge ...
Dynamic direct access of MSO query evaluation over strings
Authors: Cristian Riveros, Pierre Bourhis, Stefan Mengel et al.
Year: 2024Source: arXiv (Cornell University)
We study the problem of evaluating a Monadic Second Order (MSO) query over strings under updates in the setting of direct access. We present an algorithm that, given an MSO query with first-order free...
Fast and Small Subsampled R-indexes
Authors: Gonzalo Navarro, Travis Gagie, Dustin Cobas
Year: 2024Source: arXiv (Cornell University)
The $r$-index represented a breakthrough in compressed indexing of repetitive text collections, outperforming its alternatives by orders of magnitude in query time. Its space usage, $O(r)$ where $r$ i...
AI content detection in the emerging information ecosystem: new obligations for media and tech companies
Authors: Ricardo Baeza-Yates, David Eyers, Susan Leavy et al.
Year: 2024Source: Ethics and Information Technology
Sense through time: diachronic word sense annotations for word sense induction and Lexical Semantic Change Detection
Authors: Felipe Bravo-Márquez, Frank D. Zamora-Reina, Dominik Schlechtweg et al.
Year: 2024Source: Language Resources and Evaluation
Adaptive Dynamic Bitvectors
Authors: Gonzalo Navarro
Year: 2024Source: Lecture notes in computer science
Compressed Graph Representations for Evaluating Regular Path Queries
Authors: Gonzalo Navarro, J Robert
Year: 2024Source: Lecture notes in computer science
Political participation and technology
Authors: Sebastián Valenzuela, Marcelo Santos
Year: 2024Source: Routledge eBooks
Repetitive Patterns Recognition in Textures of Ancient Peruvian Pottery
Authors: Benjamín Bustos, Ivan Sipiran, Sebastian Sepulveda
Year: 2024Source: Journal on Computing and Cultural Heritage
We present a study and comparison of computer vision methods for the task of finding repetitive motifs in ancient Peruvian pottery. Under this context, the main difficulties for solving the task are t...
Expert Survey on the Global Information Environment 2024: Searching for Solutions
Authors: Sebastián Valenzuela, Philip N. Howard, Sacha Altay
Year: 2024
The global information environment is under significant pressure from the development of new technologies and shifting public policies. How do experts around the world perceive the varied features of,...
Responsible AI Day
Authors: Ricardo Baeza-Yates, Nataly Buslón
Year: 2024Source: Proceedings of the 28th ACM SIGKDD Conference on Knowledge Discovery and Data Mining
We summarize the goals of the Responsible AI day, giving a glimpse on the program as well as a short biography of the organizers.
Microbiota-dependent T-cell response to α-synuclein-derived antigens triggers the development of hypersensitivity and neuroinflammation associated with Parkinson's Disease
Authors: Sebastián Valenzuela, M Ricca, Valentina Ugalde et al.
Year: 2024Source: Research Square (Research Square)
<title>Abstract</title> <bold>Background</bold>. Previous evidence has shown that both the T-cell response and the microbiota play fundamental roles on the development of Parkinson's Disease (PD), whi...
Gradual Indexed Inductive Tipes
Authors: Eric Tanter, Kenji Maillard, Nicolas Tabareau et al.
Year: 2024Source: Proceedings of the ACM on Programming Languages
Indexed inductive types are essential in dependently-typed programming languages, enabling precise and expressive specifications of data structures and properties. Recognizing that programming and pro...
Self-Supervised Learning Applied to Variable Star Semi-Supervised Classification Using LSTM and GRU Networks
Authors: Hans Löbel, R. B. Merino, Billy Peralta et al.
Year: 2024
Movelet Trees
Authors: Gonzalo Navarro, Travis Gagie, Giovanni Manzini et al.
Year: 2024Source: arXiv (Cornell University)
We combine Nishimoto and Tabei's move structure with a wavelet tree to show how, if $T [1..n]$ is over a constant-sized alphabet and its Burrows-Wheeler Transform (BWT) consists of $r$ runs, then we c...
Unpacking Student Workload through Elicitation Techniques: Perspectives from Engineering Faculty and Students
Authors: Jorge Baier, Isabel Hilliger, Erick Svec et al.
Year: 2024
Abstract This is a work-in-progress about student workload. Over the past two decades, practitioners and researchers have shown concern for student workload within engineering programs. Since the late...
WIP: Exploring the Effects of a Purpose-in-Life Reflection Activity in an Introductory Artificial Intelligence Course
Authors: Jorge Baier, Trini Balart, Kristi Shryock et al.
Year: 2024
Abstract Sense of purpose in life is related to actively choosing to work for the benefit of society and has been recognized as a key influencer of well-being which in turn has been established to be ...
WIP: Traditional Engineering Assessments Challenged by ChatGPT: An Evaluation of its Performance on a Fundamental Competencies Exam
Authors: Jorge Baier, Trini Balart, Martín Castillo
Year: 2024
Abstract ChatGPT, a chatbot which produces text with remarkable coherence, is leading higher education institutions to question the relevance of the current model of engineering education and, particu...
WIP: Evaluation of the Third Design Cycle of the Wellbeing Teaching Assistant (WTA): Understanding What Type of Cases are Served Through a Categorization Analysis
Authors: Jorge Baier, Isabel Hilliger, Gabriel Astudillo et al.
Year: 2024
Abstract Well-being is increasingly recognized as a key element to foster within higher education. In this context, our institution—a prominent engineering school in Latin America—has created the ...
Complex event recognition meets hierarchical conjunctive queries
Authors: Cristian Riveros, Dante Pinto
Year: 2024Source: arXiv (Cornell University)
Hierarchical conjunctive queries (HCQ) are a subclass of conjunctive queries (CQ) with robust algorithmic properties. Among others, Berkholz, Keppeler, and Schweikardt have shown that HCQ is the subcl...
“The more official, the less I believe”: Using focus groups to explore public opinion formation in politically polarized contexts
Authors: Magdalena Saldaña, Andrés Scherman, Cristian Cabalín et al.
Year: 2024Source: Social Science Quarterly
Abstract Introduction Public opinion studies have traditionally relied on survey analyses. However, a qualitative approach is needed to address opinion formation's multidimensional and contextual natu...
Telar and TelarKG: Data-Driven Insights into Chile’s Constitutional Process
Authors: Aidan Hogan, Juan Reutter, Sergio Toro et al.
Year: 2024Source: Communications of the ACM
Global Approaches to Auditing Artificial Intelligence: A Literature Review
Authors: Marcelo Mendoza, Sebastián Valenzuela, Janaki Srinivasan et al.
Year: 2024
This Synthesis Report is a literature review outlining the regulatory, industry, and academic approaches to AI audits. We review 78 articles published in peer-reviewed journals and as preprints, 21 do...
New Compressed Indices for Multijoins on Graph Databases
Authors: Gonzalo Navarro, Diego Arroyuelo, Adrián Gómez-Brandón et al.
Year: 2024Source: arXiv (Cornell University)
A recent surprising result in the implementation of worst-case-optimal (wco) multijoins in graph databases (specifically, basic graph patterns) is that they can be supported on graph representations t...
Gradual Differentially Private Programming
Authors: Matías Toro, Eric Tanter, Federico Olmedo
Year: 2024Source: Communications of the ACM
Response to Kempf et al on Methodological and Practical Aspects of a Distant Metastasis Detection Model
Authors: Jocelyn Dunstan, Pablo Báez, Ricardo Ahumada et al.
Year: 2024Source: JCO Clinical Cancer Informatics
Welcome
Authors: Bárbara Poblete, Fábio Kon, Sebastián Uchitel
Year: 2024Source: Communications of the ACM
Bibliometrics is a research field that studies quantitatively the bibliographic material. This study analyzes the academic research developed in Latin America in economics between 1994 and 2013. The a...
A pseudonymized corpus of occupational health narratives for clinical entity recognition in Spanish
Authors: Jocelyn Dunstan, Víctor Rocco, Fabián Villena et al.
Year: 2024Source: BMC Medical Informatics and Decision Making
Despite the high creation cost, annotated corpora are indispensable for robust natural language processing systems. In the clinical field, in addition to annotating medical entities, corpus creators m...
Dynamic compact data structure for temporal reachability with unsorted contact insertions
Authors: Gonzalo Navarro, Bruno Augusto Nassif Travençolo, Marcelo Keese Albertini et al.
Year: 2024Source: The Computer Journal
Abstract Temporal graphs represent interactions between entities over time. Deciding whether entities can reach each other through temporal paths is useful for various applications such as in communic...
LB1040 Machine learning-based predictive model with routine blood work identifies moderate-severe alopecia areata
Authors: Marcelo Mendoza, Tarun Sharma, Ross O’Hagan et al.
Year: 2024Source: Journal of Investigative Dermatology
Tackling Challenges in Implementing Large-Scale Graph Databases
Authors: Aidan Hogan, Juan Reutter, Domagoj Vrgoč et al.
Year: 2024Source: Communications of the ACM
The economics of ethnic marriages: Endogamy and the social status of minority groups
Authors: Naim Bro, Liran Morav
Year: 2024Source: British Journal of Sociology
Abstract This study examines the relationship between ethnic endogamy and socioeconomic status (SES) within the socioeconomically divergent Jewish and Native‐Chilean Mapuche communities of Santiago,...
Joint models reveal genetic architecture of pubertal stage transitions and their association with BMI in admixed Chilean population
Authors: Verónica Mericq, Danilo Alvares, Esteban Barrientos et al.
Year: 2024Source: Human Molecular Genetics
Early or late pubertal onset can lead to disease in adulthood, including cancer, obesity, type 2 diabetes, metabolic disorders, bone fractures, and psychopathologies. Thus, knowing the age at which pu...
Path-based Algebraic Foundations of Graph Query Languages
Authors: Renzo Angles, Domagoj Vrgoč, Angela Bonifati et al.
Year: 2024Source: arXiv (Cornell University)
Graph databases are gaining momentum thanks to the flexibility and expressiveness of their data model and query languages. A standardization activity driven by the ISO/IEC standardization body is also...
Entity normalization in a Spanish medical corpus using a UMLS-based lexicon: findings and limitations
Authors: Jocelyn Dunstan, Pablo Báez, Fredy Núñez Torres et al.
Year: 2024Source: Language Resources and Evaluation
Cuando los algoritmos son editores: Cómo las redes sociales, la IA y la desinformación alteran el consumo de noticias
Authors: Sebastián Valenzuela
Year: 2024Source: Comunicación y Medios
Esta es una versión editada de la charla magistral del autor en la inauguración de la Conferencia Académica por el Día Mundial de la Libertad de Prensa de UNESCO 2024 y que organizaron la Universi...
Taxonomic classification with maximal exact matches in KATKA kernels and minimizer digests.
Authors: Gonzalo Navarro, Travis Gagie, Giovanni Manzini et al.
Year: 2024Source: PubMed
For taxonomic classification, we are asked to index the genomes in a phylogenetic tree such that later, given a DNA read, we can quickly choose a small subtree likely to contain the genome from which ...
Adversarial Pairwise Multimodal Recommendation
Authors: Denis Parra, Ricardo Ñanculef, Mario Mallea
Year: 2024Source: 2022 International Joint Conference on Neural Networks (IJCNN)
Long Tail Image Generation Through Feature Space Augmentation and Iterated Learning
Authors: Denis Parra, Rafael Elberg, Mircea Petrache
Year: 2024
Image and multimodal machine learning tasks are very challenging to solve in the case of poorly distributed data. In particular, data availability and privacy restrictions exacerbate these hurdles in ...
ERDoc: A Web Interface for Entity-Relation Modelling
Authors: Aidan Hogan, Sebastián Ferrada, Matias Lopez
Year: 2024
The Generalized Causal-Effect Score in Data Management (short paper)
Authors: Leopoldo Bertossi, Felipe Azua
Year: 2024
TelarKG: a Knowledge Graph of Chile's Constitutional Process
Authors: Aidan Hogan, Juan Reutter, Renzo Angles et al.
Year: 2024
Space & Time Efficient Leapfrog Triejoin
Authors: Domagoj Vrgoč, Gonzalo Navarro, Diego Arroyuelo et al.
Year: 2024
Physics-informed neural networks for parameter estimation in blood flow models
Authors: Jocelyn Dunstan, Sergio Uribe, Jeremías Garay et al.
Year: 2024Source: Computers in Biology and Medicine
Gender Representation Across Online Retail Products
Authors: Bárbara Poblete, Dana Pessach
Year: 2024Source: 2022 ACM Conference on Fairness, Accountability, and Transparency
We present a broad characterization of gender representation in a large heterogeneous sample of retail products. In particular, we study online product textual information, such as titles and descript...
A New Upper Bound for the Makespan of Cost-Optimal Solutions for Multi-Agent Path Finding (Extended Abstract)
Authors: Jorge Baier, Rodrigo López, Roberto Asín‐Achá
Year: 2024Source: Proceedings of the International Symposium on Combinatorial Search
A well-known approach to solving Multi-Agent Path Finding (MAPF) optimally is compilation to Boolean Satisfiability or Answer Set Programming (ASP). Such compilation-based approaches are superior to o...
Finding a Small, Diverse Subset of the Pareto Solution Set in Bi-Objective Search (Extended Abstract)
Authors: Jorge Baier, Nicolás Rivera, Pablo Araneda et al.
Year: 2024Source: Proceedings of the International Symposium on Combinatorial Search
Bi-objective search requires computing a Pareto solution set which contains a set of paths. In real-world applications, Pareto solution sets may contain several tens or even hundreds of solutions. For...
Counting on General Run-Length Grammars
Authors: Gonzalo Navarro, Alejandro Pacheco
Year: 2024Source: arXiv (Cornell University)
We introduce a data structure for counting pattern occurrences in texts compressed with any run-length context-free grammar. Our structure uses space proportional to the grammar size and counts the oc...
Querying Graph Databases at Scale
Authors: Aidan Hogan, Domagoj Vrgoč
Year: 2024
The tutorial provides an in-depth overview of recent advances in algorithms and data structures for processing graph database queries. The focus will be on scalable algorithms that have been demonstra...
MillenniumDB: A Multi-modal, Multi-model Graph Database
Authors: Aidan Hogan, Marcelo Arenas, Juan Reutter et al.
Year: 2024
Current knowledge graphs encompass diverse data formats, including images, text, tables, audio files, and videos. Additionally, the graph database ecosystem is required to support multiple co-existing...
Demonstrating REmatch: A Novel RegEx Engine for Finding all Matches
Authors: Cristian Riveros, Domagoj Vrgoč, Vicente Calisto et al.
Year: 2024
In this demonstration we showcase REmatch, a regular expression (RegEx) engine built to find all matches of a given pattern in a document. REmatch is based on the theory of enumeration algorithms, and...
The Limitations of Data, Machine Learning and Us
Authors: Ricardo Baeza-Yates
Year: 2024
Machine learning (ML), particularly deep learning, is being used everywhere. However, not always is applied well or has ethical and/or scientific issues. In this keynote we first do a deep dive in the...
A Data Management Approach to Explainable AI
Authors: Marcelo Arenas
Year: 2024
In recent years, there has been a growing interest in developing methods to explain individual predictions made by machine learning models. This has led to the development of various notions of explan...
A framework for extraction and transformation of documents
Authors: Cristian Riveros, Nicole Schweikardt, Markus L. Schmid
Year: 2024Source: arXiv (Cornell University)
We present a theoretical framework for the extraction and transformation of text documents. We propose to use a two-phase process where the first phase extracts span-tuples from a document, and the se...
A Principled Approach for a New Bias Measure
Authors: Ricardo Baeza-Yates, Bruno Scarone, Alfredo Viola
Year: 2024Source: arXiv (Cornell University)
The widespread use of machine learning and data-driven algorithms for decision making has been steadily increasing over many years. The areas in which this is happening are diverse: healthcare, employ...
Compact Path Representations for Graph Database Pattern Matching
Authors: Domagoj Vrgoč, Carlos Rojas, Stijn Vansummeren et al.
Year: 2024
Modern graph database query languages such as GQL, SQL/PGQ, and Cypher allow regular path queries to return entire paths, as opposed to only their endpoints. This is challenging for query evaluation, ...
14th Temporal Web Analytics Workshop (TempWeb)
Authors: Ricardo Baeza-Yates, Omar Alonso, Marc Spaniol
Year: 2024
The TempWeb workshop series is an established co-located event at The Web Conference that aims at bringing together researchers and practitioners across various domains. Naturally, submissions address...
Implications of Regulations on the Use of AI and Generative AI for Human-Centered Responsible Artificial Intelligence
Authors: Ricardo Baeza-Yates, Marios Constantinides, Michael Madaio et al.
Year: 2024
With the upcoming AI regulations (e.g., EU AI Act) and rapid advancements in generative AI, new challenges emerge in the area of Human-Centered Responsible Artificial Intelligence (HCR-AI). As AI beco...
Disjointed Polarization in Chile’s Enduring Crisis of Representation
Authors: Juan Pablo Luna
Year: 2024Source: Latin American Politics and Society
Abstract This analytical essay proposes the notion of disjointed polarization to characterize the nature of polarization in contemporary Chile. In disjointed polarization, elite-level polarization doe...
Is the change deforestation? Using time-series analysis of satellite data to disentangle deforestation from other forest degradation causes
Authors: Susana Eyheramendy, Javier Lopatin, Ignacio Fuentes et al.
Year: 2024Source: Remote Sensing Applications Society and Environment
Augmented non-hallucinating large language models as medical information curators
Authors: Aidan Hogan, Jakob Nikolas Kather, Stephen Gilbert
Year: 2024Source: npj Digital Medicine
Reliably processing and interlinking medical information has been recognized as a critical foundation to the digital transformation of medical workflows, and despite the development of medical ontolog...
SpatialCluster: A Python library for urban clustering
Authors: Felipe Castro Gutiérrez, Axel Reyes, Camila Vera et al.
Year: 2024Source: SoftwareX
This paper introduces SpatialCluster, a Python library developed for clustering urban areas using geolocated data. The library integrates a range of methods for urban clustering, including Deep Modula...
Generalized Straight-Line Programs
Authors: Gonzalo Navarro, Francisco Javier Vidal Olivares, C. Urbina
Year: 2024Source: arXiv (Cornell University)
It was recently proved that any Straight-Line Program (SLP) generating a given string can be transformed in linear time into an equivalent balanced SLP of the same asymptotic size. We generalize this ...
(Don’t) Stop Believing: A Signal Detection Approach to Risk and Protective Factors for Engagement with Politicized (Mis)Information in Social Media
Authors: Sebastián Valenzuela, Marcelo Santos, Tobias Rothmund et al.
Year: 2024
Prior misinformation research often lacks comparisons with the processing of true information and specifically focuses on the dangers of right-wing or conservative misinformation. By employing a signa...
A Self-Righteous, Not a Virtuous, Circle: Proposing a New Framework for Studying Media Effects on Knowledge and Political Participation in a Social Media Environment
Authors: Sebastián Valenzuela, Sangwon Lee
Year: 2024Source: Social Media + Society
To explain the participatory effects of news exposure, communication scholars have long relied upon the “virtuous circle” framework of media use and civic participation. That is, news consumption ...
Faster Maximal Exact Matches with Lazy LCP Evaluation
Authors: Gonzalo Navarro, Travis Gagie, Adrián Goga et al.
Year: 2024
MONI (Rossi et al.,
A simpler data structure for dynamic strings
Authors: Gonzalo Navarro, Zsuzsanna Lipták, Francesco Masillo
Year: 2024Source: arXiv (Cornell University)
We consider the problem of maintaining a collection of strings while efficiently supporting splits and concatenations on them, as well as comparing two substrings, and computing the longest common pre...
Detection and impact estimation of social bots in the Chilean Twitter network
Authors: Marcelo Mendoza, Sebastián Valenzuela, Marcelo Santos et al.
Year: 2024Source: Scientific Reports
Abstract The rise of bots that mimic human behavior represents one of the most pressing threats to healthy information environments on social media. Many bots are designed to increase the visibility o...
BAT-LZ Out of Hell
Authors: Gonzalo Navarro, Zsuzsanna Lipták, Francesco Masillo
Year: 2024Source: arXiv (Cornell University)
Despite consistently yielding the best compression on repetitive text collections, the Lempel-Ziv parsing has resisted all attempts at offering relevant guarantees on the cost to access an arbitrary s...
Worst-Case-Optimal Similarity Joins on Graph Databases
Authors: Aidan Hogan, Juan Reutter, Benjamín Bustos et al.
Year: 2024Source: Proceedings of the ACM on Management of Data
We extend the concept of worst-case optimal equijoins in graph databases to the case where some nodes are required to be within the k-nearest neighbors (kNN) of others under some similarity function. ...
Similarity joins and clustering for SPARQL
Authors: Aidan Hogan, Benjamín Bustos, Sebastián Ferrada
Year: 2024Source: Semantic Web
The SPARQL standard provides operators to retrieve exact matches on data, such as graph patterns, filters and grouping. This work proposes and evaluates two new algebraic operators for SPARQL 1.1 that...
Exploring the Impact of Generative AI for StandUp Report Recommendations in Software Capstone Project Development
Authors: Marcelo Mendoza, Andrés Neyem, Juan Pablo Sandoval Alcocer et al.
Year: 2024
StandUp Reports play an important role in capstone software engineering courses, facilitating progress tracking, obstacle identification, and team collaboration. However, despite their significance, s...
Introduction to Responsible AI
Authors: Ricardo Baeza-Yates
Year: 2024
In the first part of this tutorial we define responsible AI and we discuss the problems embedded in terms like ethical or trustworthy AI. In the second part, to set the stage, we cover irresponsible A...
Stronger and Safer Together: Motivations for and Challenges of (Trans)National Collaboration in Investigative Reporting in Latin America
Authors: Magdalena Saldaña, Lourdes M. Cueva Chacón
Year: 2024Source: Routledge eBooks
The Threat of Misinformation on Journalism’s Epistemology: Exploring the Gap between Journalist’s and Audience’s Expectations when Facing Fake Content
Authors: Marcelo Mendoza, Sebastián Valenzuela, Eliana Providel et al.
Year: 2024Source: Digital Journalism
This study analyzes the discourse of reporters, editors and audiences in focus groups and in-depth interviews, examining the expectations on journalists when facing misinformation. While both groups a...
A Family of Centrality Measures for Graph Data Based on Subgraphs
Authors: Cristian Riveros, Sebastián Bugedo, Jorge Salas
Year: 2024Source: ACM Transactions on Database Systems
We present the theoretical foundations and first experimental study of a new approach in centrality measures for graph data. The main principle is straightforward: the more relevant subgraphs around a...
Work in Progress: A Cross-sectional Survey Study for Understanding and Addressing the Needs of Engineering Students During COVID-19
Authors: Jorge Baier, Isabel Hilliger, Constanza Melian et al.
Year: 2024Source: 2020 ASEE Virtual Annual Conference Content Access Proceedings
His research focuses on areas of automated reasoning in Artificial Intelligence; specifically, automated planning, search and knowledge representation.Currently his research focuses on understanding h...
Iterated Straight-Line Programs
Authors: Gonzalo Navarro, C. Urbina
Year: 2024Source: arXiv (Cornell University)
We explore an extension to straight-line programs (SLPs) that outperforms, for some text families, the measure $\delta$ based on substring complexity, a lower bound for most measures and compressors e...
Stronger compact representations of object trajectories
Authors: Gonzalo Navarro, Travis Gagie, Adrián Gómez-Brandón et al.
Year: 2024Source: Geo-spatial Information Science
GraCT and ContaCT were the first compressed data structures to represent object trajectories, demonstrating that it was possible to use orders of magnitude less space than classical indexes while stay...
The Ring: Worst-case Optimal Joins in Graph Databases using (Almost) No Extra Space
Authors: Aidan Hogan, Juan Reutter, Gonzalo Navarro et al.
Year: 2024Source: ACM Transactions on Database Systems
We present an indexing scheme for triple-based graphs that supports join queries in worst-case optimal (wco) time within compact space. This scheme, called a ring , regards each triple as a cyclic str...
The Well-being Teaching Assistant: A Proactive Approach to Caring for Students with Academic and Personal Difficulties in Massive Courses
Authors: Jorge Baier, Isabel Hilliger, Gabriel Astudillo et al.
Year: 2024
Abstract Since the covid pandemic, some higher education institutions have promoted a flexible evaluation approach for students who face a variety of problems. Instructors willing to implement such fl...
Social ties, mental well-being and academic self-regulation. Exploring effects through Structural Equation Modeling.
Authors: Jorge Baier, Isabel Hilliger, Gabriel Astudillo et al.
Year: 2024
Abstract A long tradition of studies in both psychology and sociology has shown that social ties have positive effects on mental well-being of both the population in general and in educational context...
Link Prediction with Relational Hypergraphs
Authors: Pablo Barceló, Michael M. Bronstein, Miguel Romero Orth et al.
Year: 2024Source: arXiv (Cornell University)
Link prediction with knowledge graphs has been thoroughly studied in graph machine learning, leading to a rich landscape of graph neural network architectures with successful applications. Nonetheless...
WIP: Exploring differences in student sense of belonging inside and outside the engineering classroom
Authors: Jorge Baier, Isabel Hilliger, Gabriel Astudillo et al.
Year: 2024
Abstract This Work-in-Progress (WIP) aims to explore differences in engineering students' sense of belonging. By sense of belonging, researchers have referred to the feeling of mattering to a communit...
The problem of estimation and forecasting of obesity prevalence using sparsely collected data
Authors: Jocelyn Dunstan, Cristóbal Cuadrado, Luis Rojo-González et al.
Year: 2024Source: Engineering Applications of Artificial Intelligence
The Meso News-Space as a Framework for Studying Mobile Instant Messaging Services
Authors: Sebastián Valenzuela, Marcelo Santos
Year: 2024Source: Digital Journalism
A pseudonymized corpus of occupational health narratives for clinical entity recognition in Spanish
Authors: Jocelyn Dunstan, Víctor Rocco, Fabián Villena et al.
Year: 2024Source: Research Square (Research Square)
<title>Abstract</title> Despite the high creation cost, annotated corpora are indispensable for robust natural language processing systems. In the clinical field, apart from annotating medical entitie...
Automatic Detection of Distant Metastasis Mentions in Radiology Reports in Spanish
Authors: Jocelyn Dunstan, Matías Rojas, Pablo Báez et al.
Year: 2024Source: JCO Clinical Cancer Informatics
A critical task in oncology is extracting information related to cancer metastasis from electronic health records. Metastasis-related information is crucial for planning treatment, evaluating patient ...
Securing Verified IO Programs Against Unverified Code in F*
Authors: Eric Tanter, Cătălin Hriţcu, Ştefan Ciobâcă et al.
Year: 2024Source: Proceedings of the ACM on Programming Languages
We introduce SCIO*, a formally secure compilation framework for statically verified programs performing input-output (IO). The source language is an F* subset in which a verified program interacts wit...
Responsible AI in Farming: A Multi-Criteria Framework for Sustainable Technology Design
Authors: Ricardo Baeza-Yates, Kevin Mallinger
Year: 2024Source: Applied Sciences
The continuous fusion of artificial intelligence (AI) and autonomous farming machinery (e.g., drones and field robots) provides a significant shift in the daily work experience of farmers. Faced with ...
A Transforming Digital Journalism Editorial Team Calls for a Tribute and a Welcome
Authors: Magdalena Saldaña, Oscar Westlund
Year: 2024Source: Digital Journalism
The Distributional Uncertainty of the SHAP score in Explainable Machine Learning
Authors: Leopoldo Bertossi, Nina Pardal, Santiago Cifuentes et al.
Year: 2024Source: arXiv (Cornell University)
Attribution scores reflect how important the feature values in an input entity are for the output of a machine learning model. One of the most popular attribution scores is the SHAP score, which is an...
Geospatial Raster Data Processing Applying Neural Networks
Authors: Magdalena Saldaña, Carlos Guzmán Sanchéz-Mejorada, Rolando Quintero et al.
Year: 2024Source: Communications in computer and information science
Speedy Gonzales: A Collection of Fast Task-Specific Models for Spanish
Authors: Felipe Bravo-Márquez, José Cañete
Year: 2024
Wheeler Maps
Authors: Gonzalo Navarro, Travis Gagie, Jouni Sirén et al.
Year: 2024Source: Lecture notes in computer science
Iterated Straight-Line Programs
Authors: Gonzalo Navarro, C. Urbina
Year: 2024Source: Lecture notes in computer science
Space-Efficient Conversions from SLPs
Authors: Gonzalo Navarro, Travis Gagie, Adrián Goga et al.
Year: 2024Source: Lecture notes in computer science
Toward an AI Knowledge Assistant for Context-Aware Learning Experiences in Software Capstone Project Development
Authors: Marcelo Mendoza, Andrés Neyem, Juan Pablo Sandoval Alcocer et al.
Year: 2024Source: IEEE Transactions on Learning Technologies
Software assistants have significantly impacted software development for both practitioners and students, particularly in capstone projects. The effectiveness of these tools varies based on their know...
Cross-Lingual Cross-Domain Transfer Learning for Rumor Detection
Authors: Marcelo Mendoza, Mauricio Solar, Eliana Providel
Year: 2024
Extracting and Encoding: Leveraging Large Language Models and Medical Knowledge to Enhance Radiological Text Representation
Authors: Denis Parra, Pablo Messina, Álvaro Soto et al.
Year: 2024Source: Findings of the Association for Computational Linguistics: ACL 2022
iHealth-Chile-3&2 at RRG24: Template Based Report Generation
Authors: Denis Parra, Pablo Messina, Álvaro Soto et al.
Year: 2024
iHealth-Chile-1 at RRG24: In-context Learning and Finetuning of a Large Multimodal Model for Radiology Report Generation
Authors: Denis Parra, Pablo Messina, Rafael Elberg et al.
Year: 2024
Overconfidence is Key: Verbalized Uncertainty Evaluation in Large Language and Vision-Language Models
Authors: Matías Toro, Tobias Groot
Year: 2024
Post-processing of Medical Image for Neurosurgical Planning with Academic Purposes
Authors: Pablo Barceló, Rocío Buenamaizón, Ricardo Berjano et al.
Year: 2024Source: IFMBE proceedings
Post-Processing Applied to Brain Tumor Surgery: Case studies
Authors: Pablo Barceló, Rocío Buenamaizón, Ricardo Berjano et al.
Year: 2024Source: IFMBE proceedings
An optimized relational database for querying structural patterns in proteins
Authors: Renzo Angles, Roberto García, Mauricio Arenas‐Salinas et al.
Year: 2024Source: Database
Abstract A database is an essential component in almost any software system, and its creation involves more than just data modeling and schema design. It also includes query optimization and tuning. T...
YARS-PG: Property Graphs Representation for Publication and Exchange
Authors: Renzo Angles, Dominik Tomaszuk, Łukasz Szeremeta
Year: 2024Source: IEEE Access
Graph serialization is a critical aspect of advancing graph-oriented systems and applications. Despite the importance of standardized serialization for property graphs, there is a lack of a universal ...
Path Querying in Graph Databases: A Systematic Mapping Study
Authors: Renzo Angles, Roberto García
Year: 2024Source: IEEE Access
Path querying refers to the evaluation of path queries in a graph database. New research in this topic is crucial for the development of graph database systems as path queries are associated with rele...
The Property Graph Data Format (PGDF)
Authors: Renzo Angles, Sebastián Ferrada, Ignacio Burgos
Year: 2024Source: IEEE Access
Responsible AI: An Urgent Mandate
Authors: Ricardo Baeza-Yates, Usama M. Fayyad
Year: 2024Source: IEEE Intelligent Systems
AI is rapidly becoming essential in various industries, raising societal expectations. AI's societal consequences include impacts on mental health; misinformation; workforce displacement; and economic...
All Models are Wrong, But Some are Deadly: Inconsistencies in Emotion Detection in Suicide-related Tweets
Authors: Ricardo Baeza-Yates, Resmi Ramachandranpillai, Annika Marie Schoene et al.
Year: 2024
A Credibility Divide? Discerning Truth From Misinformation in Chile
Authors: Sebastián Valenzuela, Ingrid Bachmann, Daniel Halpern et al.
Year: 2024Source: International Journal of Public Opinion Research
Abstract Studies on misinformation often overlook people’s assessment of true information, focusing instead on beliefs in and sharing of false content. This is problematic, as it limits scholars’ ...
A Privacy-Preserving Corpus for Occupational Health in Spanish: Evaluation for NER and Classification Tasks
Authors: Tamara Quiroga, Thomas Vakili, Claudio Aracena et al.
Year: 2024
How Could Be Used Student Comments for Delivering Feedback to Instructors in Higher Education?
Authors: Jorge Baier, Isabel Hilliger, Gabriel Astudillo
Year: 2024Source: Communications in computer and information science
Chile: La deriva del sistema político y el fracaso del nuevo proceso constitucional
Authors: Sergio Toro, AGUSTINA NOGUERA
Year: 2024Source: Revista de ciencia política
News Gathering: Leveraging Transformers to Rank News
Authors: Marcelo Mendoza, Hans Löbel, Maximiliano Ojeda et al.
Year: 2024Source: Lecture notes in computer science
Publications for 2023
Displaying 155 publication(s) for 2023
ACHS-Privacy Corpus
Authors: Jocelyn Dunstan, Víctor Rocco, Fabián Villena et al.
Year: 2023Source: Zenodo (CERN European Organization for Nuclear Research)
ACHS-Privacy Corpus
Authors: Jocelyn Dunstan, Víctor Rocco, Fabián Villena et al.
Year: 2023Source: Zenodo (CERN European Organization for Nuclear Research)
A Panel Study on the Dynamics of Social Media Use and Conspiracy Thinking
Authors: Sebastián Valenzuela, Daniel Halpern, Sangwon Lee et al.
Year: 2023Source: Media Psychology
Studies exploring the association between social media use and belief in conspiracy theories have yielded mixed evidence. To address this inconsistency, we focus on conspiracy thinking – a predispos...
K-Focal Search for Slow Learned Heuristics
Authors: Jorge Baier, Carlos Hernández, Jorge Toro et al.
Year: 2023Source: IEEE Access
Bounded suboptimal heuristic search is a family of search algorithms capable of solving hard combinatorial problems, returning suboptimal solutions within a given bound.Recent machine learning approac...
Predicting disease severity in multiple sclerosis using multimodal data and machine learning
Authors: Ricardo Baeza-Yates, Ana Freire, Priscilla Bäcker‐Koduah et al.
Year: 2023Source: Journal of Neurology
Multiple sclerosis patients would benefit from machine learning algorithms that integrates clinical, imaging and multimodal biomarkers to define the risk of disease activity.
Bias and the Web
Authors: Ricardo Baeza-Yates, Leena Murgai
Year: 2023
Abstract Bias is everywhere, sometimes blatantly explicit, but most of the time it’s hidden, as it often arises from that which is missing, the gaps in our knowledge or data. In this chapter, we cov...
Ciencias, golpe de Estado y Dictadura en Chile
Authors: Claudio Gutiérrez
Year: 2023Source: Anales de la Universidad de Chile
de «limpieza» física.En la tercera, abordamos la «limpieza» ideológica y disciplinaria.En la cuarta, tratamos la
Measuring Bias
Authors: Ricardo Baeza-Yates, Aida Sharif Rohani
Year: 2023Source: 2021 IEEE International Conference on Big Data (Big Data)
The extensive use of machine learning (ML) for supporting or making major decisions such as employment, credit card approval, or juridical decisions has resulted in rising concerns over the widespread...
Differential privacy and SPARQL
Authors: Federico Olmedo, Carlos Buil-Aranda, Jorge Lobo
Year: 2023Source: Semantic Web
Differential privacy is a framework that provides formal tools to develop algorithms to access databases and answer statistical queries with quantifiable accuracy and privacy guarantees. The notions o...
Sherlock-wannabes or when the audience fact-checks. How ideology, education, and alternative media use explain fact-checking behaviors
Authors: Magdalena Saldaña, Marcelo Santos
Year: 2023Source: Estudios sobre el Mensaje Periodístico
When confronted with suspicious information, the most common advice is to rely on trusted, well-known news media outlets to verify it. However, in a high-choice, fragmented media ecosystem, news reade...
Local Government, Social Media and Management of COVID-19: The Case of Chilean Mayoral Communication
Authors: Sergio Toro, Sebastián Valenzuela, Juan Pablo Luna et al.
Year: 2023Source: Political Communication
Most research on governments' use of social media focuses on the national or federal level. We therefore know little about the way local authorities harness social media platforms to communicate with ...
Report on the 13th Workshop on Temporal Web Analytics (TempWeb 2023) at WWW 2023
Authors: Ricardo Baeza-Yates, Omar Alonso, Marc Spaniol
Year: 2023Source: ACM SIGIR Forum
TempWeb is an established Workshop (series) with a long-standing tradition as a co-located event at The Web Conference. Considering the constantly evolving Web as a primary object of research, TempWeb...
Politics and Media in <i>Journalism & Mass Communication Quarterly</i>: A Centennial Research Retrospective
Authors: Sebastián Valenzuela, Homero Gil de Zúñiga, Ingrid Bachmann et al.
Year: 2023Source: Journalism & Mass Communication Quarterly
Based on computerized and manual content analyses, we examined the theories, methods, topics, and authors’ backgrounds of the empirical articles revolving around politics and media published by Jour...
Report on the 46th ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2023): Reflections from the Program Co-Chairs
Authors: Bárbara Poblete, Josiane Mothe, Makoto P. Kato
Year: 2023Source: ACM SIGIR Forum
The ACM SIGIR Conference on Research and Development in Information Retrieval has been experiencing significant growth over the past few years. In 2023, SIGIR received a total of 822 full paper submis...
FairXAI - A Taxonomy and Framework for Fairness and Explainability Synergy in Machine Learning
Authors: Ricardo Baeza-Yates, Fredrik Heintz, Resmi Ramachandranpillai
Year: 2023
<p>Explainable Artificial Intelligence (XAI) and Fair Learning have made significant strides in various application domains, including criminal recidivism predictions, healthcare settings, toxic...
FairXAI - A Taxonomy and Framework for Fairness and Explainability Synergy in Machine Learning
Authors: Ricardo Baeza-Yates, Fredrik Heintz, Resmi Ramachandranpillai
Year: 2023
<p>Explainable Artificial Intelligence (XAI) and Fair Learning have made significant strides in various application domains, including criminal recidivism predictions, healthcare settings, toxic...
Near-Optimal Search Time in $$\delta $$-Optimal Space, and Vice Versa
Authors: Gonzalo Navarro, Tomasz Kociumaka, Francisco Javier Vidal Olivares
Year: 2023Source: Algorithmica
Generative AI models should include detection mechanisms as a condition for public release
Authors: Ricardo Baeza-Yates, Raja Chatila, David Eyers et al.
Year: 2023Source: Ethics and Information Technology
Abstract The new wave of ‘foundation models’—general-purpose generative AI models, for production of text (e.g., ChatGPT) or images (e.g., MidJourney)—represent a dramatic advance in the state...
A comparative dataset: Bridging COVID-19 and other diseases through epistemonikos and CORD-19 evidence
Authors: Denis Parra, Hans Löbel, Andrés Carvallo et al.
Year: 2023Source: Data in Brief
The COVID-19 pandemic has underlined the need for reliable information for clinical decision-making and public health policies. As such, evidence-based medicine (EBM) is essential in identifying and e...
Bias Invariant Approaches for Improving Word Embedding Fairness
Authors: Bárbara Poblete, Vanessa Murdock, Rongting Zhang et al.
Year: 2023
Many public pre-trained word embeddings have been shown to encode different types of biases. Embeddings are often obtained from training on large pre-existing corpora, and therefore resulting biases c...
Natural language processing analysis of the psychosocial stressors of mental health disorders during the pandemic
Authors: Susana Eyheramendy, Maria Paz Hermosilla, Isidora Paiva-Mack et al.
Year: 2023Source: npj Mental Health Research
Abstract Over the past few years, the COVID-19 pandemic has exerted various impacts on the world, notably concerning mental health. Nevertheless, the precise influence of psychosocial stressors on thi...
Evaluation of 3D Reconstruction for Cultural Heritage Applications
Authors: Benjamín Bustos, Ivan Sipiran, Cristián Llull et al.
Year: 2023
In recent years, we have seen the emergence of methods for creating 3D digital reproductions of objects using photos. These techniques, particularly when combined with handheld video devices like smar...
An empirical study of the effect of video encoders on Temporal Video Grounding
Authors: Felipe Bravo-Márquez, Edison Marrese-Taylor, I. Jara et al.
Year: 2023
Temporal video grounding is a fundamental task in computer vision, aiming to localize a natural language query in a long, untrimmed video. It has a key role in the scientific community, in part due to...
No Agreement Without Loss: Learning and Social Choice in Peer Review
Authors: Pablo Barceló, Tomasz Steifer, Cristóbal Rojas et al.
Year: 2023Source: Frontiers in artificial intelligence and applications
In peer review systems, reviewers are often asked to evaluate various features of submissions, such as technical quality or novelty. A score is given to each of the predefined features and based on th...
Uncovering Bias in Personal Informatics
Authors: Ricardo Baeza-Yates, Athena Vakali, Pavlos Sermpezis et al.
Year: 2023Source: Proceedings of the ACM on Interactive Mobile Wearable and Ubiquitous Technologies
Personal informatics (PI) systems, powered by smartphones and wearables, enable people to lead healthier lifestyles by providing meaningful and actionable insights that break down barriers between use...
2.2 kW single-mode narrow-linewidth laser delivery through a hollow-core fiber
Authors: Denis Parra, Matthew Cooper, Joseph Wahlen et al.
Year: 2023Source: Optica
Antiresonant hollow-core fibers (AR-HCFs) have opened up exciting possibilities for high-energy and high-power laser delivery because of their exceptionally low nonlinearities and high damage threshol...
Los presidencialismos y la inestabilidad política en América Latina: Contención e incorporación del conflicto durante el siglo XIX
Authors: Sergio Toro, Juan Carlos Arellano González, Alejandro Olivares
Year: 2023Source: Revista Chilena de Derecho y Ciencia Política
Una de las principales características de los presidencialismos de América Latina es que, a lo largo de la historia, se han mostrado diversos momentos de inestabilidad. En búsqueda de algunas expli...
Optimizing RPQs over a compact graph representation
Authors: Aidan Hogan, Gonzalo Navarro, Diego Arroyuelo et al.
Year: 2023Source: The VLDB Journal
Truth be told: How “true” and “false” labels influence user engagement with fact-checks
Authors: Sebastián Valenzuela, Ingrid Bachmann, Tiago Ventura et al.
Year: 2023Source: New Media & Society
When do users share fact-checks on social media? We describe a survey experiment conducted during the 2019 election in Argentina measuring the propensity of voters to share corrections to political mi...
SparqLog: A System for Efficient Evaluation of SPARQL 1.1 Queries via Datalog
Authors: Renzo Angles, Georg Gottlob, Reinhard Pichler et al.
Year: 2023Source: Proceedings of the VLDB Endowment
Over the past decade, Knowledge Graphs have received enormous interest both from industry and from academia. Research in this area has been driven, above all, by the Database (DB) community and the Se...
Expert Survey on the Global Information Environment 2023: Lessons for Technology Policy and Design
Authors: Wendy Hui Kyong Chun, Philip N. Howard, Hubert Au et al.
Year: 2023
The global information environment is impacted by both technology design and public policy. This Summary for Policymakers summarizes Trends in the Global Information Environment: 2023 Expert Survey Re...
Trends in the Global Information Environment: 2023 Expert Survey Results
Authors: Sebastián Valenzuela, Wendy Hui Kyong Chun, Philip N. Howard et al.
Year: 2023
The information environment is rapidly evolving, with algorithmic bias, manipulation and misinformation having a significant impact on public life. The global network of researchers is an important so...
‘Does she know how to read?’ An intersectional perspective to explore Twitter users’ portrayal of women Mapuche leaders
Authors: Magdalena Saldaña, Isabel Pavez, Ximena Orchard et al.
Year: 2023Source: Information Communication & Society
ABSTRACTSocial media offer new opportunities for women in politics, but also new ground for the expression of bias and stereotypes. Drawing upon literature about mediated representations of women in p...
Efficient construction of the BWT for repetitive text using string compression
Authors: Gonzalo Navarro, Diego Díaz-Domínguez
Year: 2023Source: Information and Computation
We present a new semi-external algorithm that builds the Burrows–Wheeler transform variant of Bauer et al. (a.k.a., BCR BWT) in linear expected time. Our method uses compression techniques to reduce...
Artificial intelligence-based decision-making: can ChatGPT replace a multidisciplinary tumour board?
Authors: Sebastián Valenzuela, Javier Vela Ulloa, Christophe Riquoir Altamirano et al.
Year: 2023Source: British journal of surgery
Artificial intelligence (AI) has been around for a while.Recent reports 1,2 have evaluated its role in assisting clinical decision-making, with promising results.After its launch in 2022 by OpenAI (Sa...
DIVERGÊNCIA KULLBACK-LEIBLER APLICADA A FWI
Authors: Juan Pablo Luna, Gilberto Barbosa Neto Carvalho, Virgílio José Martins Ferreira Filho
Year: 2023Source: Revista Contemporânea
A FWI (FUll-Waveform Inversion) é um dos métodos mais robustos para extrair informações sísmicas. Contudo, a norma L2 usada para medir a diferença entre dados sísmicos nem sempre é a melhor op...
The Shapley Value in Database Management
Authors: Leopoldo Bertossi, Mikaël Monet, Ester Livshits et al.
Year: 2023Source: ACM SIGMOD Record
Attribution scores can be applied in data management to quantify the contribution of individual items to conclusions from the data, as part of the explanation of what led to these conclusions. In Arti...
Fair Multilingual Vandalism Detection System for Wikipedia
Authors: Ricardo Baeza-Yates, Diego Sáez-Trumper, Mykola Trokhymovych et al.
Year: 2023Source: Proceedings of the 28th ACM SIGKDD Conference on Knowledge Discovery and Data Mining
This paper presents a novel design of the system aimed at supporting the Wikipedia community in addressing vandalism on the platform. To achieve this, we collected a massive dataset of 47 languages, a...
LECTURE HELD AT THE ACADEMIA EUROPAEA BUILDING BRIDGES CONFERENCE 2022
Authors: Ricardo Baeza-Yates
Year: 2023Source: European Review
Artificial intelligence (AI) has finally reached most people on our planet thanks to generative AI tools for text and other media. This has started a controversy about the possible benefits and risks,...
Influence of quality of reduction using radiological criteria on kinematics and kinetics in ankle fractures with unstable syndesmotic injury
Authors: Aidan Hogan, Ursula Trinler, Paul Alfred Grützner et al.
Year: 2023Source: Clinical Biomechanics
BackgroundIn ankle fractures with syndesmotic injury, the anatomic reduction of the ankle mortise is crucial for preventing osteoarthritis. Yet, no studies have analysed the effect of surgical reducti...
How are AI assistants changing higher education?
Authors: Ricardo Baeza-Yates, Michael Neumann, Eva-Maria Schön et al.
Year: 2023Source: Frontiers in Computer Science
Context Higher education is changing at an accelerating pace due to the widespread use of digital teaching and emerging technologies. In particular, AI assistants such as ChatGPT pose significant chal...
Wikipedia Multilingual Vandalism Detection Dataset
Authors: Ricardo Baeza-Yates, Diego Sáez-Trumper, Mykola Trokhymovych et al.
Year: 2023Source: Zenodo (CERN European Organization for Nuclear Research)
This dataset accompanies a research paper that introduces a novel system designed to support the Wikipedia community in combating vandalism on the platform. The dataset has been prepared to enhance th...
Wikipedia Multilingual Vandalism Detection Dataset
Authors: Ricardo Baeza-Yates, Diego Sáez-Trumper, Mykola Trokhymovych et al.
Year: 2023Source: Zenodo (CERN European Organization for Nuclear Research)
This dataset accompanies a research paper that introduces a novel system designed to support the Wikipedia community in combating vandalism on the platform. The dataset has been prepared to enhance th...
A transcription and information extraction system to facilitate EHR documentation in Spanish
Authors: Jocelyn Dunstan, Fabián Villena, Matías Rojas et al.
Year: 2023Source: Research Square (Research Square)
<title>Abstract</title> The large and diverse access to data sources in healthcare has boosted the application of novel computer techniques that can extract meaningful information to improve patients'...
Proceedings of the 46th International ACM SIGIR Conference on Research and Development in Information Retrieval
Authors: Bárbara Poblete, Hsin‐Hsi Chen, Josiane Mothe et al.
Year: 2023
Welcome to the 46th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2023), taking place in Taipei, Taiwan, from July 23-27, 2023. As the premier s...
RiverText: A Python Library for Training and Evaluating Incremental Word Embeddings from Text Data Streams
Authors: Felipe Bravo-Márquez, Gabriel Iturra-Bocaz
Year: 2023Source: Proceedings of the 45th International ACM SIGIR Conference on Research and Development in Information Retrieval
Word embeddings have become essential components in various information retrieval and natural language processing tasks, such as ranking, document classification, and question answering. However, desp...
Criminal Politics and Botched Development in Contemporary Latin America
Authors: Juan Pablo Luna, Andreas Emil Feldmann
Year: 2023
This Element investigates the relationship between the narcotics industry and politics and assesses how it influences domestic political dynamics, including economic development prospects in Latin Ame...
State Responses to Autonomy Demands: Indigenous Movements and Regional Threats in Bolivia and Ecuador
Authors: Carla Alberti, Shannan Mattiace
Year: 2023Source: Journal of Politics in Latin America
In this paper, we examine the political factors that explain state responses to demands for indigenous territorial autonomy in Ecuador and Bolivia. Specifically, we aim to explain why the 2009 Bolivia...
The Impact of the Web on Information Retrieval
Authors: Ricardo Baeza-Yates, Peter Mika
Year: 2023Source: ACM eBooks
chapter Share on The Impact of the Web on Information Retrieval Authors: Peter Mika Search about this author , Ricardo Baeza-Yates Search about this author Authors Info & Claims Linking the World's In...
Uncovering Bias in Personal Informatics
Authors: Ricardo Baeza-Yates, Athena Vakali, Pavlos Sermpezis et al.
Year: 2023Source: Zenodo (CERN European Organization for Nuclear Research)
Strategies for Improving the Global Information Environment: Results from a Systematic Review and Meta-Analysis
Authors: Sebastián Valenzuela, Wendy Hui Kyong Chun, Philip N. Howard et al.
Year: 2023
Which design solutions mitigate the impact of misinformation on social media platforms, according to the latest scientific research? This IPIE Summary for Policymakers presents the main findings of tw...
Joint models reveal genetic architecture of transitions between pubertal stages and their association with BMI in a Latino population
Authors: Susana Eyheramendy, Lucas Vicuña, Verónica Mericq et al.
Year: 2023Source: medRxiv (Cold Spring Harbor Laboratory)
Abstract Early or late pubertal onset can lead to disease in adulthood, including cancer, obesity, type 2 diabetes, metabolic disorders, bone fractures and psychopathologies. Thus, knowing the age at ...
REmatch: A Novel Regex Engine for Finding All Matches
Authors: Cristian Riveros, Domagoj Vrgoč, Nicolás Van Sint Jan
Year: 2023Source: Proceedings of the VLDB Endowment
In this paper, we present the REmatch system for information extraction. REmatch is based on a recently proposed enumeration algorithm for evaluating regular expressions with capture variables support...
Visual Exploration of Repetitive Patterns on Ancient Peruvian Pottery
Authors: Benjamín Bustos, Ivan Sipiran, Tobias Schreck et al.
Year: 2023Source: Journal of WSCG
The analysis and understanding of artefact properties and their relationships is a key goal in archaeological analysis of cultural heritage objects. There are many aspects of concern, including shape ...
Special Issue on “Artificial Intelligence‐Driven Decision Making in Health and Medicine”
Authors: Leopoldo Bertossi, Herb Kunze, Marc Poulin et al.
Year: 2023Source: International Transactions in Operational Research
Artificial Intelligence (AI) refers to an interdisciplinary area which embraces computer science, robotics, engineering, mathematics, and statistics, and is largely based on the ability of a machine t...
Radiografía de un mito: la representación estereotipada de los videojugadores puesta a prueba en Chile
Authors: Magdalena Saldaña, Marco Jaramillo
Year: 2023Source: Comunicación y Medios
Los jugadores de videojuegos han sido representados en medios de comunicación y en productos culturales como niños u hombres jóvenes con escasa vida social, sin participación en la vida comunitari...
Evaluating Pre-training Strategies for Collaborative Filtering
Authors: Denis Parra, Leandro Balby Marinho, Rodrygo L. T. Santos et al.
Year: 2023
Pre-training is essential for effective representation learning models, especially in natural language processing and computer vision-related tasks. The core idea is to learn representations, usually ...
PG-Schema: Schemas for Property Graphs
Authors: Renzo Angles, Domagoj Vrgoč, Juan Sequeda et al.
Year: 2023Source: Proceedings of the ACM on Management of Data
Property graphs have reached a high level of maturity, witnessed by multiple robust graph database systems as well as the ongoing ISO standardization effort aiming at creating a new standard Graph Que...
MillenniumDB: An Open-Source Graph Database System
Authors: Cristian Riveros, Aidan Hogan, Carlos Buil-Aranda et al.
Year: 2023Source: Data Intelligence
Abstract In this systems paper, we present MillenniumDB: a novel graph database engine that is modular, persistent, and open source. MillenniumDB is based on a graph data model, which we call domain g...
Do Fiscal Transfers Affect Local Democracy? Lessons from Chilean Municipalities
Authors: Carla Alberti, Diego Díaz Rioseco, Ignacio Riveros
Year: 2023Source: Latin American Politics and Society
ABSTRACT Extant literature concurs that fiscal transfers affect local democracy when they grant subnational governments nontax revenue. Yet there is nonetheless a mismatch between this concept and exi...
Cross-Lingual and Cross-Domain Crisis Classification for Low-Resource Scenarios
Authors: Jorge Pérez, Bárbara Poblete, Hernán Sarmiento et al.
Year: 2023Source: Proceedings of the International AAAI Conference on Web and Social Media
Social media data has emerged as a useful source of timely information about real-world crisis events. One of the main tasks related to the use of social media for disaster management is the automatic...
Characterizing and Identifying Socially Shared Self-Descriptions in Product Reviews
Authors: Bárbara Poblete, Vanessa Murdock, Chia-Jung Lee et al.
Year: 2023Source: Proceedings of the International AAAI Conference on Web and Social Media
Online e-commerce product reviews can be highly influential in a customer's decision-making processes. Reviews often describe personal experiences with a product and provide candid opinions about a pr...
GPC: A Pattern Calculus for Property Graphs
Authors: Domagoj Vrgoč, Leonid Libkin, Wim Martens et al.
Year: 2023
The development of practical query languages for graph databases runs well ahead of the underlying theory. The ISO committee in charge of database query languages is currently developing a new standar...
The ACM PODS Alberto O. Mendelzon Test-of-Time Award 2023
Authors: Marcelo Arenas, Wenfei Fan, Frank Neven
Year: 2023
Citations for the The ACM PODS Alberto O. Mendelzon Test-of-Time Award 2023
Data Stories of Water: Studying the Communicative Role of Data Visualizations within Long‐form Journalism
Authors: Denis Parra, Manuela Garretón, Francesca Morini et al.
Year: 2023Source: Computer Graphics Forum
Abstract We present a methodology for making sense of the communicative role of data visualizations in journalistic storytelling and share findings from surveying water‐related data stories. Data st...
Framing school choice and merit: news media coverage of an education policy in Chile
Authors: Magdalena Saldaña, Cristian Cabalín, M. Beatriz Fernández
Year: 2023Source: Discourse Studies in the Cultural Politics of Education
School choice is a controversial issue in the public discussion of education. In Chile, the new School Admission System (SAE) was recently implemented to gradually reverse the country's high education...
The value of mathematical modelling approaches in epidemiology for public health decision making
Authors: Ricardo Baeza-Yates, Martha Ospina, Oscar H. Franco et al.
Year: 2023Source: Colombian Journal of Anesthesiology
It is discussed the relevance of quantitative approaches, specifically mathematical modelling in epidemiology, in the public health decision-making process. This topic is discussed here based on the e...
MUSIB: musical score inpainting benchmark
Authors: Denis Parra, Felipe Bravo-Márquez, Rodrigo F. Cádiz et al.
Year: 2023Source: EURASIP Journal on Audio Speech and Music Processing
Abstract Music inpainting is a sub-task of automated music generation that aims to infill incomplete musical pieces to help musicians in their musical composition process. Many methods have been devel...
Uneven States, Unequal Societies, and Democracy’s Unfulfilled Promises: Citizenship Rights in Chile and Contemporary Latin America
Authors: Juan Pablo Luna, Rodrigo M. Medel
Year: 2023Source: Latin American Politics and Society
ABSTRACT In contemporary Latin America, deep-seated social discontent with political elites and institutions has been, paradoxically, the counterpart of democratic stability and resilience. This parad...
13th Temporal Web Analytics Workshop (TempWeb) Overview
Authors: Ricardo Baeza-Yates, Omar Alonso, Marc Spaniol
Year: 2023
The TempWeb workshop series has a long-standing tradition as a co-located event at The Web Conference. Its main objectives are to provide a venue for researchers of all domains (IE/IR, Web mining, etc...
RDF Playground: An Online Tool for Learning about the Semantic Web
Authors: Aidan Hogan, Raúl Cid, Bastián Inostroza
Year: 2023
We present RDF Playground: a web-based tool to assist those who wish to learn or teach about the Semantic Web. The tool integrates functionalities relating to the key features of RDF, allowing users t...
Templet: A Collaborative System for Knowledge Graph Question Answering over Wikidata
Authors: Aidan Hogan, Francisca Suárez
Year: 2023
We present Templet: an online question answering (QA) system for Wikidata. Templet is based on the collaboratively-edited repository QAWiki, which collects questions in multiple natural languages alon...
Wikidata Atlas: Putting Wikidata on the Map
Authors: Aidan Hogan, Benjamín Del Pino
Year: 2023
Wikidata Atlas is an online system that allows users to explore Wikidata items on an interactive global map; for example, users can explore the global distribution of all lighthouses described by Wiki...
A convolutional architecture for 3D model embedding using image views
Authors: Benjamín Bustos, Ivan Sipiran, Arniel Labrada
Year: 2023Source: The Visual Computer
Lacking time: A case study of student and faculty perceptions of academic workload in the <scp>COVID</scp>‐19 pandemic
Authors: Jorge Baier, Isabel Hilliger, Gabriel Astudillo
Year: 2023Source: Journal of Engineering Education
Abstract Background To avoid the spread of COVID‐19, most engineering programs rapidly shifted to emergency online education, and prior research has associated online education with academic overloa...
Using diversity as a source of scientific innovation for the Web
Authors: Bárbara Poblete
Year: 2023Source: Proceedings of the ACM Web Conference 2022
The Web has become a resource that allows us to make sense of social phenomena around the world. This started the moment users became content creators, and has grown with the emergence of social platf...
A Study on Information Disorders on Social Networks during the Chilean Social Outbreak and COVID-19 Pandemic
Authors: Marcelo Mendoza, Sebastián Valenzuela, Claudia López et al.
Year: 2023Source: Applied Sciences
Information disorders on social media can have a significant impact on citizens’ participation in democratic processes. To better understand the spread of false and inaccurate information online, th...
10 Years of Digital Journalism (Studies): The Past, the Present, the Future
Authors: Magdalena Saldaña, Oscar Westlund, Edson C. Tandoc et al.
Year: 2023Source: Digital Journalism
The Digital Journalism editorial team is thrilled to introduce this 10th anniversary special issue. At the beginning of 2022, we invited our international editorial board to contribute to this importa...
<i>Digital Journalism</i>: The Journal and the Path that Brought us Here
Authors: Magdalena Saldaña, Oscar Westlund, Edson C. Tandoc et al.
Year: 2023Source: Digital Journalism
Click to increase image sizeClick to decrease image size Disclosure StatementNo potential conflict of interest was reported by the author(s).
Human-Centered Responsible Artificial Intelligence: Current & Future Trends
Authors: Ricardo Baeza-Yates, Lora Aroyo, Q. Vera Liao et al.
Year: 2023
In recent years, the CHI community has seen significant growth in research on Human-Centered Responsible Artificial Intelligence. While different research communities may use different terminology to ...
The long memory of the land: Pre-colonial origins of Mapuche mobilization in Chile
Authors: Sergio Toro, Carla Alberti, Juan Pablo Luna et al.
Year: 2023Source: Political Geography
Contextual Linear Types for Differential Privacy
Authors: Matías Toro, Eric Tanter, Federico Olmedo et al.
Year: 2023Source: ACM Transactions on Programming Languages and Systems
Language support for differentially private programming is both crucial and delicate. While elaborate program logics can be very expressive, type-system-based approaches using linear types tend to be ...
A Gradual Probabilistic Lamba Calculus
Authors: Matías Toro, Federico Olmedo, Wenjia Ye
Year: 2023Source: Proceedings of the ACM on Programming Languages
Probabilistic programming languages have recently gained a lot of attention, in particular due to their applications in domains such as machine learning and differential privacy. To establish invarian...
GenoVi, an open-source automated circular genome visualizer for bacteria and archaea
Authors: Roberto E. Durán, Michael Seeger, Andrés Cumsille et al.
Year: 2023Source: PLoS Computational Biology
The increase in microbial sequenced genomes from pure cultures and metagenomic samples reflects the current attainability of whole-genome and shotgun sequencing methods. However, software for genome v...
Studying the Downstream Effects of Fact-Checking on Social Media: Experiments on Correction Formats, Belief Accuracy, and Media Trust
Authors: Sebastián Valenzuela, Ingrid Bachmann
Year: 2023Source: Social Media + Society
Repeated exposure to misinformation not only reduces the accuracy of people’s beliefs, but it also decreases confidence in institutions such as the news media. Can fact-checking—journalism’s mai...
Compact representations of spatial hierarchical structures with support for topological queries
Authors: Gonzalo Navarro, José Fuentes‐Sepúlveda, Diego Seco et al.
Year: 2023Source: Information and Computation
A Researcher's Digest of GQL
Authors: Domagoj Vrgoč, Leonid Libkin, Wim Martens et al.
Year: 2023Source: HAL (Le Centre pour la Communication Scientifique Directe)
The Chilean Waiting List sub-Corpus with medical entities normalized to UMLS terminology
Authors: Jocelyn Dunstan, Pablo Báez, Leonardo Campillos Llanos
Year: 2023Source: Zenodo (CERN European Organization for Nuclear Research)
A collection of 2000 medical referrals from the Chilean Waiting List Corpus, manually annotated with six entity types (Finding, Procedure, Disease, Family Member, Body Part, and Medication) and manual...
The Chilean Waiting List sub-Corpus with medical entities normalized to UMLS terminology
Authors: Jocelyn Dunstan, Pablo Báez, Leonardo Campillos Llanos
Year: 2023Source: Zenodo (CERN European Organization for Nuclear Research)
A collection of 2000 medical referrals from the Chilean Waiting List Corpus, manually annotated with six entity types (Finding, Procedure, Disease, Family Member, Body Part, and Medication) and manual...
A named entity recognition framework using transformers to identify relevant clinical findings from mammographic radiological reports
Authors: Denis Parra, Eduardo Godoy, Alejandro Veloz et al.
Year: 2023
Detecting and extracting findings in a radiological report is crucial for text mining tasks in several applications. In this case, a labeled process for the image associated with the radiological repo...
Representing Paths in Graph Database Pattern Matching
Authors: Domagoj Vrgoč, Carlos Rojas, Stijn Vansummeren et al.
Year: 2023Source: Proceedings of the VLDB Endowment
Modern graph database query languages such as GQL, SQL/PGQ, and their academic predecessor G-Core promote paths to first-class citizens in the sense that their pattern matching facility can return pat...
Attitudinal effects of data visualizations and illustrations in data stories
Authors: Denis Parra, Manuela Garretón, Francesca Morini et al.
Year: 2023Source: IEEE Transactions on Visualization and Computer Graphics
Journalism has become more data-driven and inherently visual in recent years. Photographs, illustrations, infographics, data visualizations, and general images help convey complex topics to a wide aud...
Influence of surgical reduction on dynamic balance in patients after unstable ankle fracture.
Authors: Aidan Hogan, Ursula Trinler, Sven Y. Vetter et al.
Year: 2023Source: Gait & Posture
New insights from GWAS on BMI-related growth traits in a longitudinal cohort of admixed children with Native American and European ancestry
Authors: Susana Eyheramendy, Lucas Vicuña, Tomás Norambuena et al.
Year: 2023Source: iScience
Body-mass index (BMI) is a hallmark of adiposity. In contrast with adulthood, the genetic architecture of BMI during childhood is poorly understood. The few genome-wide association studies (GWAS) on c...
Predicting no-show appointments in a pediatric hospital in Chile using machine learning
Authors: Jocelyn Dunstan, Fabián Villena, Juan Peypouquet et al.
Year: 2023Source: Health Care Management Science
The Chilean public health system serves 74% of the country's population, and 19% of medical appointments are missed on average because of no-shows. The national goal is 15%, which coincides with the a...
The Personal Is the Political? What Do WhatsApp Users Share and How It Matters for News Knowledge, Polarization and Participation in Chile
Authors: Sebastián Valenzuela, Matías Bargsted, Ingrid Bachmann
Year: 2023Source: Routledge eBooks
Stronger and Safer Together
Authors: Magdalena Saldaña, Lourdes M. Cueva Chacón
Year: 2023Source: Routledge eBooks
Indigenous autonomy and Latin American state security in contexts of criminal violence: the cases of Cauca in Colombia and Guerrero in Mexico
Authors: Carla Alberti, Shannan Mattiace
Year: 2023Source: Latin American and Caribbean Ethnic Studies
Scholars writing on Indigenous autonomy in the Americas have focused mainly on social movement demands and on the implementation of laws that enshrine autonomy rights. The motives of state officials i...
Predicting disease severity in Multiple Sclerosis using multimodal data and machine learning
Authors: Ricardo Baeza-Yates, Ana Freire, Priscilla Bäcker‐Koduah et al.
Year: 2023Source: Research Square (Research Square)
Abstract Background Multiple Sclerosis patients would benefit from machine learning algorithms that integrates clinical, imaging, and multimodal biomarkers to define the risk of disease activity. Meth...
Uncovering Bias in Personal Informatics
Authors: Ricardo Baeza-Yates, Athena Vakali, Pavlos Sermpezis et al.
Year: 2023Source: arXiv (Cornell University)
Personal informatics (PI) systems, powered by smartphones and wearables, enable people to lead healthier lifestyles by providing meaningful and actionable insights that break down barriers between use...
Fair multilingual vandalism detection system for Wikipedia
Authors: Ricardo Baeza-Yates, Diego Sáez-Trumper, Mykola Trokhymovych et al.
Year: 2023Source: arXiv (Cornell University)
This paper presents a novel design of the system aimed at supporting the Wikipedia community in addressing vandalism on the platform. To achieve this, we collected a massive dataset of 47 languages, a...
Understanding Search Behavior Bias in Wikipedia
Authors: Ricardo Baeza-Yates, Bruno Scarone, Erik Bernhardson
Year: 2023Source: Communications in computer and information science
Countermeasures for Mitigating Digital Misinformation: A Systematic Review
Authors: Sebastián Valenzuela, Wendy Hui Kyong Chun, Philip N. Howard et al.
Year: 2023
This Synthesis Report provides a formal systematic review of scientific literature on countermeasures for mitigating digital misinformation. We focus on 588 peer-reviewed publications, drawn from arou...
Bimodal Neural Style Transfer for Image Generation Based on Text Prompts
Authors: Marcelo Mendoza, Diego Gutiérrez
Year: 2023Source: Lecture notes in computer science
Supporting Users in Refining and Comparing Topic Models: An Experimental Study
Authors: Marcelo Mendoza, Evangelos Milios, Fernando V. Paulovich et al.
Year: 2023
Topic modeling is a statistical approach for extracting themes from high volumes of textual data. Humans are needed to interpret its outputs, which include sets of terms and scores. Lately, visualizat...
Bimodal Style Transference from Musical Composition to Image Using Deep Generative Models
Authors: Marcelo Mendoza, María José Apolo
Year: 2023Source: Lecture notes in computer science
A Theory of Link Prediction via Relational Weisfeiler-Leman on Knowledge Graphs
Authors: Pablo Barceló, Miguel Romero Orth, Xingyue Huang et al.
Year: 2023Source: arXiv (Cornell University)
Graph neural networks are prominent models for representation learning over graph-structured data. While the capabilities and limitations of these models are well-understood for simple graphs, our und...
On the Power of the Weisfeiler-Leman Test for Graph Motif Parameters
Authors: Pablo Barceló, Matthias Lanzinger
Year: 2023Source: arXiv (Cornell University)
Seminal research in the field of graph neural networks (GNNs) has revealed a direct correspondence between the expressive capabilities of GNNs and the $k$-dimensional Weisfeiler-Leman ($k$WL) test, a ...
Three iterations of $(d-1)$-WL test distinguish non isometric clouds of $d$-dimensional points
Authors: Pablo Barceló, Mircea Petrache, Alexander Kozachinskiy et al.
Year: 2023Source: arXiv (Cornell University)
The Weisfeiler--Lehman (WL) test is a fundamental iterative algorithm for checking isomorphism of graphs. It has also been observed that it underlies the design of several graph neural network archite...
Separating Automatic Relations
Authors: Pablo Barceló, Diego Figueira, Rémi Morvan
Year: 2023Source: arXiv (Cornell University)
We study the separability problem for automatic relations (i.e., relations on finite words definable by synchronous automata) in terms of recognizable relations (i.e., finite unions of products of reg...
Logical Languages Accepted by Transformer Encoders with Hard Attention
Authors: Pablo Barceló, Anthony W. Lin, Alexander Kozachinskiy et al.
Year: 2023Source: arXiv (Cornell University)
We contribute to the study of formal languages that can be recognized by transformer encoders. We focus on two self-attention mechanisms: (1) UHAT (Unique Hard Attention Transformers) and (2) AHAT (Av...
Work-in-Progress: Decision Support System for the Process of Student Academic Registration
Authors: Renzo Angles, Luís Silvestre, Fabian Olivares et al.
Year: 2023Source: Lecture notes in networks and systems
SparqLog: A System for Efficient Evaluation of SPARQL 1.1 Queries via Datalog [Experiment, Analysis and Benchmark]
Authors: Renzo Angles, Georg Gottlob, Reinhard Pichler et al.
Year: 2023Source: arXiv (Cornell University)
Over the past decade, Knowledge Graphs have received enormous interest both from industry and from academia. Research in this area has been driven, above all, by the Database (DB) community and the Se...
A Novel First-Order Autoregressive Moving Average Model to Analyze Discrete-Time Series Irregularly Observed
Authors: Susana Eyheramendy, Wilfredo Palma, César Ojeda et al.
Year: 2023Source: Contributions to statistics
A novel first-order autoregressive moving average model for analyzing discrete-time series observed at irregularly spaced times is introduced. Under Gaussianity, it is established that the model is st...
Extending time-series models for irregular observational gaps with a moving average structure for astronomical sequences
Authors: Susana Eyheramendy, Wilfredo Palma, César Ojeda et al.
Year: 2023Source: RAS Techniques and Instruments
ABSTRACT In this study, we introduce a novel moving-average model for analyzing stationary time-series observed irregularly in time. The process is strictly stationary and ergodic under normality and ...
Online estimation methods for irregular autoregressive models
Authors: Susana Eyheramendy, Wilfredo Palma, Felipe Elorrieta et al.
Year: 2023Source: arXiv (Cornell University)
In the last decades, due to the huge technological growth observed, it has become increasingly common that a collection of temporal data rapidly accumulates in vast amounts. This provides an opportuni...
Online Estimation Methods for Irregular Autoregressive Models
Authors: Susana Eyheramendy, Wilfredo Palma, Felipe Elorrieta et al.
Year: 2023Source: Contributions to statistics
In the last decades, due to the huge technological growth observed, it has become increasingly common that a collection of temporal data rapidly accumulates in vast amounts. This provides an opportuni...
A Copernican Revolution in Data
Authors: Claudio Gutiérrez
Year: 2023Source: arXiv (Cornell University)
Half a century ago, Charles Bachman foresaw the significance and centrality of data in the digital world. In this short paper, we delve into the evolution of these ideas within the database community ...
Enumeration and updates for conjunctive linear algebra queries through expressibility
Authors: Cristian Riveros, Stijn Vansummeren, Thomas Muñoz
Year: 2023Source: arXiv (Cornell University)
Due to the importance of linear algebra and matrix operations in data analytics, there is significant interest in using relational query optimization and processing techniques for evaluating (sparse) ...
Towards a Comprehensive Human-Centred Evaluation Framework for Explainable AI
Authors: Denis Parra, Katrien Verbert, Ivania Donoso-Guzmán et al.
Year: 2023Source: Communications in computer and information science
A Comprehensive and Curated Dataset of Covid-19 and Epistemonikos Evidence
Authors: Denis Parra, Hans Löbel, Andrés Carvallo et al.
Year: 2023
The emergence of COVID-19 has highlighted the importance of reliable information for clinical decision-making and public health policies. Evidence-based medicine (EBM) seeks to identify and evaluate s...
Towards a Comprehensive Human-Centred Evaluation Framework for Explainable AI
Authors: Denis Parra, Katrien Verbert, Ivania Donoso-Guzmán et al.
Year: 2023Source: arXiv (Cornell University)
While research on explainable AI (XAI) is booming and explanation techniques have proven promising in many application domains, standardised human-centred evaluation procedures are still missing. In a...
Evaluating Regular Path Queries on Compressed Adjacency Matrices
Authors: Gonzalo Navarro, Diego Arroyuelo, Adrián Gómez-Brandón
Year: 2023Source: Lecture notes in computer science
Engineering Rank/Select Data Structures for Big-Alphabet Strings
Authors: Diego Arroyuelo, Erick Sepúlveda, Francisco Riveros et al.
Year: 2023Source: arXiv (Cornell University)
Big-alphabet strings are common in several scenarios such as information retrieval and natural-language processing. The efficient storage and processing of such strings usually introduces several chal...
Evaluating Regular Path Queries on Compressed Adjacency Matrices
Authors: Gonzalo Navarro, Diego Arroyuelo, Adrián Gómez-Brandón
Year: 2023Source: arXiv (Cornell University)
Regular Path Queries (RPQs), which are essentially regular expressions to be matched against the labels of paths in labeled graphs, are at the core of graph database query languages like SPARQL. A way...
Social AI and the Challenges of the Human-AI Ecosystem
Authors: Ricardo Baeza-Yates, Dino Pedreschi, Alistair Knott et al.
Year: 2023Source: arXiv (Cornell University)
The rise of large-scale socio-technical systems in which humans interact with artificial intelligence (AI) systems (including assistants and recommenders, in short AIs) multiplies the opportunity for ...
MillenniumDB: An Open-Source Graph Database System
Authors: Cristian Riveros, Aidan Hogan, Carlos Buil-Aranda et al.
Year: 2023Source: Data Intelligence
ABSTRACT In this systems paper, we present MillenniumDB: a novel graph database engine that is modular, persistent, and open source. MillenniumDB is based on a graph data model, which we call domain g...
r-indexing without backward searching
Authors: Gonzalo Navarro, Travis Gagie, Nicola Prezza et al.
Year: 2023Source: arXiv (Cornell University)
Suppose we are given a text $T$ of length $n$ and a straight-line program for $T$ with $g$ rules. Let $\bar{r}$ be the number of runs in the Burrows-Wheeler Transform of the reverse of $T$. We can ind...
Faster Maximal Exact Matches with Lazy LCP Evaluation
Authors: Adrián Goga, Nathaniel K. Brown, Jan Fostier et al.
Year: 2023Source: arXiv (Cornell University)
MONI (Rossi et al., {\it JCB} 2022) is a BWT-based compressed index for computing the matching statistics and maximal exact matches (MEMs) of a pattern (usually a DNA read) with respect to a highly re...
Pre-trained language models in Spanish for health insurance coverage
Authors: Jocelyn Dunstan, Víctor Rocco, Claudio Aracena et al.
Year: 2023
The field of clinical natural language processing (NLP) can extract useful information from clinical text. Since 2017, the NLP field has shifted towards using pre-trained language models (PLMs), impro...
Physics-informed neural networks for blood flow inverse problems
Authors: Jocelyn Dunstan, Sergio Uribe, Jeremías Garay et al.
Year: 2023Source: arXiv (Cornell University)
Physics-informed neural networks (PINNs) have emerged as a powerful tool for solving inverse problems, especially in cases where no complete information about the system is known and scatter measureme...
Development of pre-trained language models for clinical NLP in Spanish
Authors: Jocelyn Dunstan, Claudio Aracena
Year: 2023
Clinical natural language processing aims to tackle language and prediction tasks using text from medical practice, such as clinical notes, prescriptions, and discharge summaries. Several approaches h...
Automatic Coding at Scale: Design and Deployment of a Nationwide System for Normalizing Referrals in the Chilean Public Healthcare System
Authors: Jocelyn Dunstan, Fabián Villena, Matías Rojas et al.
Year: 2023
The disease coding task involves assigning a unique identifier from a controlled vocabulary to each disease mentioned in a clinical document. This task is relevant since it allows information extracti...
Automatic Coding at Scale: Design and Deployment of a Nationwide System for Normalizing Referrals in the Chilean Public Healthcare System
Authors: Jocelyn Dunstan, Fabián Villena, Matías Rojas et al.
Year: 2023Source: arXiv (Cornell University)
The disease coding task involves assigning a unique identifier from a controlled vocabulary to each disease mentioned in a clinical document. This task is relevant since it allows information extracti...
Globalization & The Challenging Political Economy of Governing (and Researching) Islands in Contemporary Times
Authors: Juan Pablo Luna
Year: 2023Source: Social and ecological interactions in the Galapagos Islands
A neuro-symbolic framework for answering conjunctive queries
Authors: Pablo Barceló, Juan Reutter, Floris Geerts et al.
Year: 2023Source: arXiv (Cornell University)
The problem of answering logical queries over incomplete knowledge graphs is receiving significant attention in the machine learning community. Neuro-symbolic models are a promising recent approach, s...
Evaluating Regular Path Queries in GQL and SQL/PGQ: How Far Can The Classical Algorithms Take Us?
Authors: Domagoj Vrgoč, Carlos Rojas, Benjamín Farías
Year: 2023Source: arXiv (Cornell University)
Path queries are a core feature of modern graph query languages such as Cypher, SQL/PGQ, and GQL. These languages provide a rich set of features for matching paths, such as restricting to certain path...
Gradual Sensitivity Typing
Authors: Matías Toro, Eric Tanter, Damián Árquez
Year: 2023Source: arXiv (Cornell University)
Reasoning about the sensitivity of functions with respect to their inputs has interesting applications in various areas, such as differential privacy. In order to check and enforce sensitivity, severa...
Unveiling Backbone Effects in CLIP: Exploring Representational Synergies and Variances
Authors: Felipe Bravo-Márquez, Edison Marrese-Taylor, I. Jara et al.
Year: 2023Source: arXiv (Cornell University)
Contrastive Language-Image Pretraining (CLIP) stands out as a prominent method for image representation learning. Various neural architectures, spanning Transformer-based models like Vision Transforme...
Constant Time and Space Updates for the Sigma-Tau Problem
Authors: Gonzalo Navarro, Aaron Williams, Zsuzsanna Lipták et al.
Year: 2023Source: Lecture notes in computer science
Dynamic Compact Data Structure for Temporal Reachability with Unsorted Contact Insertions
Authors: Gonzalo Navarro, Bruno Augusto Nassif Travençolo, Marcelo Keese Albertini et al.
Year: 2023Source: arXiv (Cornell University)
Temporal graphs represent interactions between entities over time. Deciding whether entities can reach each other through temporal paths is useful for various applications such as in communication net...
Wheeler maps
Authors: Gonzalo Navarro, Travis Gagie, Jouni Sirén et al.
Year: 2023Source: arXiv (Cornell University)
Motivated by challenges in pangenomic read alignment, we propose a generalization of Wheeler graphs that we call Wheeler maps. A Wheeler map stores a text $T[1..n]$ and an assignment of tags to the ch...
Platform Responses to Misinformation: A Meta-Analysis of Data
Authors: Sebastián Valenzuela, Wendy Hui Kyong Chun, Philip N. Howard et al.
Year: 2023
Digital misinformation is a critical issue affecting the global information environment. Countering misinformation and its effects is a major objective of governments, international organizations, con...
Maintaining the cycle structure of dynamic permutations
Authors: Gonzalo Navarro, Zsuzsanna Lipták, Francesco Masillo
Year: 2023Source: arXiv (Cornell University)
We present a new data structure for maintaining dynamic permutations, which we call a $\textit{forest of splay trees (FST)}$. The FST allows one to efficiently maintain the cycle structure of a permut...
A Simple Grammar-Based Index for Finding Approximately Longest Common Substrings
Authors: Gonzalo Navarro, Travis Gagie, Sana Kashgouli
Year: 2023Source: Lecture notes in computer science
Attribution-Scores and Causal Counterfactuals as Explanations in Artificial Intelligence
Authors: Leopoldo Bertossi
Year: 2023Source: Lecture notes in computer science
From Database Repairs to Causality in Databases and Beyond
Authors: Leopoldo Bertossi
Year: 2023Source: Lecture notes in computer science
Reasoning Web. Causality, Explanations and Declarative Knowledge
Authors: Leopoldo Bertossi, Guohui Xiao
Year: 2023Source: Lecture notes in computer science
Efficient Computation of Shap Explanation Scores for Neural Network Classifiers via Knowledge Compilation
Authors: Leopoldo Bertossi, Jorge Esquiche León
Year: 2023Source: Lecture notes in computer science
Attribution-Scores and Causal Counterfactuals as Explanations in Artificial Intelligence
Authors: Leopoldo Bertossi
Year: 2023Source: arXiv (Cornell University)
In this expository article we highlight the relevance of explanations for artificial intelligence, in general, and for the newer developments in {\em explainable AI}, referring to origins and connecti...
From Database Repairs to Causality in Databases and Beyond
Authors: Leopoldo Bertossi
Year: 2023Source: arXiv (Cornell University)
We describe some recent approaches to score-based explanations for query answers in databases. The focus is on work done by the author and collaborators. Special emphasis is placed on the use of count...
Efficient Computation of Shap Explanation Scores for Neural Network Classifiers via Knowledge Compilation
Authors: Leopoldo Bertossi, Jorge E. Leon
Year: 2023Source: arXiv (Cornell University)
The use of Shap scores has become widespread in Explainable AI. However, their computation is in general intractable, in particular when done with a black-box classifier, such as neural network. Recen...
Attribution-Scores in Data Management and Explainable Machine Learning
Authors: Leopoldo Bertossi
Year: 2023Source: arXiv (Cornell University)
We describe recent research on the use of actual causality in the definition of responsibility scores as explanations for query answers in databases, and for outcomes from classification models in mac...
Attribution-Scores in Data Management and Explainable Machine Learning
Authors: Leopoldo Bertossi
Year: 2023Source: Lecture notes in computer science
A Symbolic Language for Interpreting Decision Trees
Authors: Pablo Barceló, Marcelo Arenas, Bernardo Subercaseaux et al.
Year: 2023Source: arXiv (Cornell University)
The recent development of formal explainable AI has disputed the folklore claim that "decision trees are readily interpretable models", showing different interpretability queries that are computationa...
Publications for 2022
Displaying 201 publication(s) for 2022
Medios de comunicación y confianza política en América Latina: análisis individual y contextual del rol de las noticias en la confianza en el gobierno y el Estado
Authors: Sebastián Valenzuela, Ingrid Bachmann, Daniela Grassau et al.
Year: 2022Source: Revista Internacional de Sociología
¿Cuál es la asociación entre exposición a noticias y confianza política en Latinoamérica? ¿Hay diferencias según la libertad del sistema de medios y los niveles de polarización política? Par...
Two-Dimensional Block Trees
Authors: Gonzalo Navarro, Travis Gagie, Adrián Gómez-Brandón et al.
Year: 2022Source: The Computer Journal
Abstract The Block Tree is a data structure for representing repetitive sequences in compressed space, which reaches space comparable with that of Lempel–Ziv compression while retaining fast direct ...
Learning to cluster urban areas: two competitive approaches and an empirical validation
Authors: Marcelo Mendoza, Sergio Toro, Hans Löbel et al.
Year: 2022Source: EPJ Data Science
Abstract Urban clustering detects geographical units that are internally homogeneous and distinct from their surroundings. It has applications in urban planning, but few studies compare the effectiven...
Exploration Trade-offs in Web Recommender Systems
Authors: Ricardo Baeza-Yates, Giovanni Delnevo
Year: 2022Source: 2021 IEEE International Conference on Big Data (Big Data)
One of the main problems of web recommender systems is exposure bias, due to the fact that the web system itself is partly generating its own future, as users can only click on items shown to them. Th...
A scalable and energy efficient GPU thread map for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e646" altimg="si105.svg"><mml:mi>m</mml:mi></mml:math>-simplex domains
Authors: Benjamín Bustos, Felipe A. Quezada, Cristóbal A. Navarro et al.
Year: 2022Source: Future Generation Computer Systems
Test datasets for GenoVi: draft and complete genomes
Authors: Carlos Buil-Aranda, Mauricio Araya, Nicolás Jara et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
Test dataset for GenoVi (Genome Visualizer).<br> All the genomes available in this repository were used to create all the analysis done by Cumsille et al., 2022 for the publication of GenoVi.
Test datasets for GenoVi: draft and complete genomes
Authors: Carlos Buil-Aranda, Mauricio Araya, Nicolás Jara et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
Test dataset for GenoVi (Genome Visualizer).<br> All the genomes available in this repository were used to create all the analysis done by Cumsille et al., 2022 for the publication of GenoVi.
Extending Sticky-Datalog+/- via Finite-Position Selection Functions: Tractability, Algorithms, and Optimization
Authors: Leopoldo Bertossi, Mostafa Milani
Year: 2022Source: Information Systems
Human vs. Artificial Intelligence
Authors: Ricardo Baeza-Yates, Pablo Villoslada
Year: 2022
In this essay we compare human and artificial intelligence from two points of view: computational and neuroscience. We discuss the differences and limitations of AI with respect to our intelligence, e...
Report on the 12th Temporal Web Analytics Workshop (TempWeb 2022) at WWW 2022
Authors: Ricardo Baeza-Yates, Omar Alonso, Marc Spaniol
Year: 2022Source: ACM SIGIR Forum
TempWeb focuses on investigating infrastructures, scalable methods, and innovative software for aggregating, querying, and analyzing heterogeneous data at Web scale. Emphasis is given to data analysis...
Using Automated Planning to Provide Feedback during Collaborative Problem-Solving
Authors: Jorge Baier, Miguél Nussbaum, María Fernanda Rodríguez et al.
Year: 2022Source: International Journal of Artificial Intelligence in Education
LSQ 2.0: A linked dataset of SPARQL query logs
Authors: Aidan Hogan, Carlos Buil-Aranda, Axel-Cyrille Ngonga Ngomo et al.
Year: 2022Source: Semantic Web
We present the Linked SPARQL Queries (LSQ) dataset, which currently describes 43.95 million executions of 11.56 million unique SPARQL queries extracted from the logs of 27 different endpoints. The LSQ...
Gradual System F
Authors: Elizabeth Labrada, Matías Toro, Eric Tanter
Year: 2022Source: Journal of the ACM
Bringing the benefits of gradual typing to a language with parametric polymorphism like System F, while preserving relational parametricity, has proven extremely challenging: first attempts were formu...
Fiscal Origins of Subnational Democracy: Evidence from Argentina
Authors: Carla Alberti, Diego Díaz Rioseco
Year: 2022Source: Politics & Society
Subnational governments are generally funded by fiscal rents, that is, transfers of centrally levied taxes. Existing literature concurs that fiscal federalism breeds rentierism and, consequently, hind...
Toward a Definitive Compressibility Measure for Repetitive Sequences
Authors: Gonzalo Navarro, Nicola Prezza, Tomasz Kociumaka
Year: 2022Source: IEEE Transactions on Information Theory
While the <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$k$ </tex-math></inline-formula> th order empirical entr...
Counting the Answers to a Query
Authors: Cristian Riveros, Marcelo Arenas, Rajesh Jayaram et al.
Year: 2022Source: ACM SIGMOD Record
Counting the answers to a query is a fundamental problem in databases, with several applications in the evaluation, optimization, and visualization of queries. Unfortunately, counting query answers is...
Issue Information
Authors: Subhani Shaik, R. Rodríguez, Sally A. Campbell‐Lee et al.
Year: 2022Source: European Journal Of Haematology
“What a nasty girl!” incivility and gendered symbolic violence in news discussions
Authors: Magdalena Saldaña, Valentina Proust
Year: 2022Source: Feminist Media Studies
This study examines conversations developed in the virtual public sphere to identify if a user's gender affects the presence of incivility in news comment sections. By relying on a mixed-method analys...
Aplicaciones de aprendizaje automático en salud
Authors: Jocelyn Dunstan, Fabián Villena, Claudio Aracena et al.
Year: 2022Source: Revista Médica Clínica Las Condes
El presente trabajo tiene por objetivo mostrar algunas aplicaciones recientes de aprendizaje automático en el área de la salud. El aprendizaje automático o machine learning es una rama de la inteli...
Procesamiento de lenguaje natural para texto clínico en español: el caso de las listas de espera en Chile
Authors: Jocelyn Dunstan, Pablo Báez, Fredy Núñez Torres et al.
Year: 2022Source: Revista Médica Clínica Las Condes
Las listas de espera no cubiertas por el Plan de Garantías Explícitas en Salud para nueva consulta de especialidad en Chile se han visto incrementadas por los efectos de la pandemia del coronavirus ...
La salud en la era digital
Authors: Claudio Gutiérrez, Mercedes López
Year: 2022Source: Revista Médica Clínica Las Condes
On the expressiveness of Lara: A proposal for unifying linear and relational algebra
Authors: Pablo Barceló, Nelson Higuera, Jorge Pérez et al.
Year: 2022Source: Theoretical Computer Science
On Computing Probabilistic Explanations for Decision Trees
Authors: Pablo Barceló, Bernardo Subercaseaux, Marcelo Arenas et al.
Year: 2022Source: Conference on Neural Information Processing Systems (NeurIPS 2022)
Datasets of Time- and Space-Efficient Regular Path Queries
Authors: Aidan Hogan, Gonzalo Navarro, Diego Arroyuelo et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
Datasets that were used in the experiments of our work <em>Time- and Space-Efficient Regular Path Queries.</em>
Datasets of Time- and Space-Efficient Regular Path Queries
Authors: Aidan Hogan, Gonzalo Navarro, Diego Arroyuelo et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
Datasets that were used in the experiments of our work <em>Time- and Space-Efficient Regular Path Queries.</em>
Space/time-efficient RDF stores based on circular suffix sorting
Authors: Gonzalo Navarro, Guillermo de Bernardo, Nieves R. Brisaboa et al.
Year: 2022Source: The Journal of Supercomputing
CLNews: The First Dataset of the Chilean Social Outbreak for Disinformation Analysis
Authors: Marcelo Mendoza, Eliana Providel, Daniel Toro-González et al.
Year: 2022Source: Proceedings of the 31st ACM International Conference on Information & Knowledge Management
Disinformation is one of the main threats that loom on social networks. Detecting disinformation is not trivial and requires training and maintaining fact-checking teams, which is labor-intensive. Rec...
Simple and efficient bi-objective search algorithms via fast dominance checks
Authors: Jorge Baier, Carlos Hernández, Luis Suazo et al.
Year: 2022Source: Artificial Intelligence
Another Violent Protest? New Perspectives to Understand Protest Coverage
Authors: Magdalena Saldaña, Valentina Proust
Year: 2022Source: Media and Communication
This study assesses the relationship between two well-established sets of frames to better understand the news coverage of massive political protests. By relying on Semetko and Valkenburg’s generic ...
An automatic methodology to measure drivers’ behavior in public transport
Authors: Hans Löbel, Juan Carlos Herrera, Hernan F. Catalan
Year: 2022Source: Journal of Intelligent Transportation Systems
The way in which public transport buses are driven has an influence in users'perception and satisfaction with the service. Bus driver's behavior is usually obtained surveying passengers and/or using t...
Multi-Agent Path Finding: A New Boolean Encoding
Authors: Roberto Asin Acha, Rodrigo Lopez, Sebastian Hagedorn et al.
Year: 2022Source: Journal of Artificial Intelligence Research
Multi-agent pathfinding (MAPF) is an NP-hard problem. As such, dense maps may be very hard to solve optimally. In such scenarios, compilation-based approaches, via Boolean satisfiability (SAT) and ans...
Explainable neural image recommendation using Network Dissection visual concepts
Authors: Denis Parra, Hans Löbel, Antonio Ossa-Guerra
Year: 2022
Training and intrinsic evaluation of lightweight word embeddings for the clinical domain in Spanish
Authors: Jocelyn Dunstan, Cecilia Besa, Fabián Villena et al.
Year: 2022Source: Frontiers in Artificial Intelligence
Resources for Natural Language Processing (NLP) are less numerous for languages different from English. In the clinical domain, where these resources are vital for obtaining new knowledge about human ...
A Reasonably Gradual Type Theory
Authors: Eric Tanter, Kenji Maillard, Meven Lennon-Bertrand et al.
Year: 2022Source: Proceedings of the ACM on Programming Languages-PACMPL
Gradualizing the Calculus of Inductive Constructions (CIC) involves dealing with subtle tensions between normalization, graduality, and conservativity with respect to CIC. Recently, GCIC has been prop...
Propositional Equality for Gradual Dependently Typed Programming
Authors: Eric Tanter, Joseph Eremondi, Ronald Garcia
Year: 2022Source: Proceedings of the ACM on Programming Languages-PACMPL
Gradual dependent types can help with the incremental adoption of dependently typed code by providing a principled semantics for imprecise types and proofs, where some parts have been omitted. Current...
Faster compressed quadtrees
Authors: Gonzalo Navarro, Travis Gagie, Guillermo de Bernardo et al.
Year: 2022Source: Journal of Computer and System Sciences
UMLS Heading Sequences in Spanish
Authors: Jocelyn Dunstan, Cecilia Besa, Fabián Villena et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
UMLS Heading Sequences in Spanish used to compute Word embeddings for the Spanish clinical language
Medical Journals in Spanish
Authors: Jocelyn Dunstan, Cecilia Besa, Fabián Villena et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
Medical Journals in Spanish used to compute Word embeddings for the Spanish clinical language
Chilean waiting list corpus
Authors: Jocelyn Dunstan, Cecilia Besa, Fabián Villena et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
The chilean waiting list corpus used to compute Word embeddings for the Spanish clinical language
UMLS Heading Sequences in Spanish
Authors: Jocelyn Dunstan, Cecilia Besa, Fabián Villena et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
UMLS Heading Sequences in Spanish used to compute Word embeddings for the Spanish clinical language
Medical Journals in Spanish
Authors: Jocelyn Dunstan, Cecilia Besa, Fabián Villena et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
Medical Journals in Spanish used to compute Word embeddings for the Spanish clinical language
Chilean waiting list corpus
Authors: Jocelyn Dunstan, Cecilia Besa, Fabián Villena et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
The chilean waiting list corpus used to compute Word embeddings for the Spanish clinical language
Can political alignment reduce crime? Evidence from Chile
Authors: Carla Alberti, Diego Díaz Rioseco, Giancarlo Visconti
Year: 2022Source: Political Science Research and Methods
Abstract Research has shown that presidents tend to benefit local level copartisans when distributing resources, which can improve the provision of public goods, such as security. Considering that fea...
People are more engaged on Facebook as they get older, especially in politics: evidence from users in 46 countries
Authors: Pablo Ortellado, Juan Carlos Rodríguez‐Raga, Marcio Moretto et al.
Year: 2022Source: Journal of Quantitative Description Digital Media
A growing body of literature has noted an age pattern in the sharing of false news in social media, with older people sharing more often misinformation than younger users. In this article we supplemen...
Dynamic Data Structures for Timed Automata Acceptance
Authors: Cristian Riveros, Alejandro Grez, Filip Mazowiecki et al.
Year: 2022Source: Algorithmica
We study a variant of the classical membership problem in automata theory, which consists of deciding whether a given input word is accepted by a given automaton. We do so through the lenses of parame...
Actitudes políticas y solicitudes de ayuda directa a los gobiernos locales en América Latina
Authors: Sergio Toro, Danytza González-Ceballos
Year: 2022Source: AMÉRICA LATINA HOY
Este artículo estudia la relación entre las ayudas directas de los gobiernos y autoridades locales con las actitudes políticas de la ciudadanía. Se analizan datos de la encuesta Barómetro de las ...
Interactive annotation of geometric ornamentation on painted pottery assisted by deep learning
Authors: Benjamín Bustos, Ivan Sipiran, Tobias Schreck et al.
Year: 2022Source: it - Information Technology
Abstract In Greek art, the phase from 900 to 700 BCE is referred to as the Geometric period due to the characteristically simple geometry-like ornamentations appearing on painted pottery surfaces duri...
Grammar Compression by Induced Suffix Sorting
Authors: Gonzalo Navarro, Simon Gog, Maurício Ayala-Rincón et al.
Year: 2022Source: ACM Journal of Experimental Algorithmics
A grammar compression algorithm, called GCIS, is introduced in this work. GCIS is based on the induced suffix sorting algorithm SAIS, presented by Nong et al. in 2009. The proposed solution builds on ...
Biomechanical comparison of a 3D-printed prosthetic foot with conventional feet in people with transtibial amputation: A prospective cohort study
Authors: Aidan Hogan, Ursula Trinler, Mathias Rehg et al.
Year: 2022Source: Prosthetics and Orthotics International
The method of 3D printing is increasingly gaining utilization in clinical applications and may support prosthetic fitting. The aim was to compare biomechanical outcomes of people with a transtibial am...
WIP: Exploring differences in student sense of belonging inside and outside the engineering classroom
Authors: Jorge Baier, Isabel Hilliger, Maria Javiera de los Rios et al.
Year: 2022Source: ASEE Annual Conference and Exposition, Conference Proceedings
Changing Media Landscapes and Political Participation
Authors: Sebastián Valenzuela, Marcelo Santos
Year: 2022Source: Oxford University Press eBooks
Abstract This chapter discusses how a constantly changing media landscape affects political participation. After pointing out the affordances brought forward by digital media and communication technol...
Semantics and canonicalisation of SPARQL 1.1
Authors: Aidan Hogan, Jaime Salas
Year: 2022Source: Semantic Web
Total mutational load and clinical features as predictors of the metastatic status in lung adenocarcinoma and squamous cell carcinoma patients
Authors: Gonzalo Navarro, Karen Oróstica, Álvaro Olivera‐Nappa et al.
Year: 2022Source: Journal of Translational Medicine
Abstract Background Recently, extensive cancer genomic studies have revealed mutational and clinical data of large cohorts of cancer patients. For example, the Pan-Lung Cancer 2016 dataset (part of Th...
Navigating planar topologies in near-optimal space and time
Authors: Gonzalo Navarro, José Fuentes‐Sepúlveda, Diego Seco
Year: 2022Source: Computational Geometry
Gradualizing the Calculus of Inductive Constructions
Authors: Eric Tanter, Kenji Maillard, Meven Lennon-Bertrand et al.
Year: 2022Source: ACM Transactions on Programming Languages and Systems
We investigate gradual variations on the Calculus of Inductive Construction (CIC) for swifter prototyping with imprecise types and terms. We observe, with a no-go theorem, a crucial tradeoff between g...
Real-Time Heuristic Search with LTLf Goals
Authors: Jorge Baier, Jiame Middleton, Rodrigo Toro
Year: 2022Source: IJCAI International Joint Conference on Artificial Intelligence
The structure of political conflict. The oligarchs and the bourgeoisie in the Chilean Congress, 1834–1894
Authors: Naim Bro
Year: 2022Source: Theory and Society
Focal Discrepancy Search for Learned Heuristics
Authors: Jorge Baier, Matias Greco, Pablo Araneda
Year: 2022Source: Proceedings of the International Symposium on Combinatorial Search
Machine learning allows learning accurate but inadmissible heuristics for hard combinatorial puzzles like the 15-puzzle, the 24-puzzle, and Rubik's cube. In this paper, we investigate how to exploit t...
Avoiding Errors in Learned Heuristics in Bounded-Suboptimal Search
Authors: Jorge Baier, Matias Greco
Year: 2022Source: Proceedings of the International Symposium on Combinatorial Search
Despite being very effective, learned heuristics in bounded-suboptimal search can produce heuristic plateaus or move the search to zones of the state space that do not lead to a solution. In addition,...
K-Focal Search for Slow Learned Heuristics (Extended Abstract)
Authors: Jorge Baier, Matias Greco, Jorge Toro et al.
Year: 2022Source: Proceedings of the International Symposium on Combinatorial Search
Learned heuristics, though inadmissible, can provide very good guidance for bounded-suboptimal search. Given a single search state s and a learned heuristic h, evaluating h(s) is typically very slow r...
Subset Approximation of Pareto Regions with Bi-Objective A* (Extended Abstract)
Authors: Jorge Baier, Nicolás Rivera, Carlos Hernández Ulloa
Year: 2022Source: Proceedings of the International Symposium on Combinatorial Search
In bi-objective search, we are given a graph in which each directed arc is associated with a pair of non-negative weights, and the objective is to find the Pareto-optimal solution set. Unfortunately, ...
Data from the paper "Learning to clusterize urban areas: two competitive approaches and an empirical validation"
Authors: Marcelo Mendoza, Sergio Toro, Hans Löbel et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
Data for urban clustering used in the paper "Learning to clusterize urban areas: two competitive approaches and an empirical validation". We release two datasets for urban clustering based on data acq...
Data from the paper "Learning to clusterize urban areas: two competitive approaches and an empirical validation"
Authors: Marcelo Mendoza, Sergio Toro, Hans Löbel et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
Data for urban clustering used in the paper "Learning to clusterize urban areas: two competitive approaches and an empirical validation". We release two datasets for urban clustering based on data acq...
Hierarchical Transformers for Group-Aware Sequential Recommendation: Application in MOBA Games
Authors: Denis Parra, Vladimir Araujo, Andrés Villa et al.
Year: 2022
In recent years, several recommendation systems have been introduced to improve the user experience of players in video games. In Multiplayer Online Battle Arena (MOBA) games, a popular game genre, th...
Reflections on a Legacy: Thoughts from Scholars about Agenda-Setting Past and Future
Authors: Chris J. Vargo, Gerald M. Kosicki, David H. Weaver et al.
Year: 2022Source: Mass Communication & Society
In response to Perloff's (this issue) essay examining the development and future of agenda setting, a series of scholars offer their own reactions to the essay and the broader issues it raises.
Real-Time Heuristic Search with LTLf Goals
Authors: Jorge Baier, Rodrigo Toro Icarte, Jaime Middleton
Year: 2022Source: Proceedings of the Thirty-First International Joint Conference on Artificial Intelligence
In Real-Time Heuristic Search (RTHS) we are given a search graph G, a heuristic, and the objective is to find a path from a given start node to a given goal node in G. As such, one does not impose any...
Subset Approximation of Pareto Regions with Bi-objective A
Authors: Jorge Baier, Nicolás Rivera, Carlos Hernández
Year: 2022Source: Proceedings of the AAAI Conference on Artificial Intelligence
In bi-objective search, we are given a graph in which each directed arc is associated with a pair of non-negative weights, and the objective is to find the Pareto-optimal solution set. Unfortunately, ...
Bots don’t Vote, but They Surely Bother!
Authors: Ricardo Baeza-Yates, Eduardo Graells-Garrido
Year: 2022
The Web contains several social media platforms for exchange of ideas and content publishing. These platforms are used by people, but also by distributed agents known as bots. Bots have existed for de...
PromoterLCNN: A Light CNN-Based Promoter Prediction and Classification Model
Authors: Dary Hernández, Nicolás Jara, Mauricio Araya et al.
Year: 2022Source: GENES
Promoter identification is a fundamental step in understanding bacterial gene regulation mechanisms. However, accurate and fast classification of bacterial promoters continues to be challenging. New m...
Word embeddings for the Spanish clinical language
Authors: Jocelyn Dunstan, Cecilia Besa, Fabián Villena et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
Word embeddings for the Spanish clinical language Corpora used to compute the embeddings: Chilean waiting list corpus - https://zenodo.org/record/7072314 Medical Journal in Spanish - https://zenodo.or...
Word embeddings for the Spanish clinical language
Authors: Jocelyn Dunstan, Cecilia Besa, Fabián Villena et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
Word embeddings for the Spanish clinical language Corpora used to compute the embeddings: Chilean waiting list corpus - https://zenodo.org/record/7072314 Medical Journal in Spanish - https://zenodo.or...
Efficient Enumeration for Annotated Grammars
Authors: Cristian Riveros, Martín Muñoz, Antoine Amarilli et al.
Year: 2022
We introduce annotated grammars, an extension of context-free grammars which allows annotations on terminals. Our model extends the standard notion of regular spanners, and is more expressive than the...
Graph Pattern Matching in GQL and SQL/PGQ
Authors: Domagoj Vrgoč, Oskar van Rest, Stefan Plantikow et al.
Year: 2022Source: Proceedings of the 2022 International Conference on Management of Data
As graph databases become widespread, the International Organization for Standardization (ISO) and International Electrotechnical Commission (IEC) have approved a project to create GQL, a standard pro...
A Reasonably Gradual Type Theory – Artifact
Authors: Eric Tanter, Meven Lennon-Bertrand, Kenji Maillard et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
A Reasonably Gradual Type Theory – Artifact
Authors: Eric Tanter, Meven Lennon-Bertrand, Kenji Maillard et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
Corruption and Political Knowledge Erosion. A Cautionary Tale from Latin America
Authors: Sebastián Valenzuela, Matías Bargsted, Ingrid Bachmann
Year: 2022Source: International Journal of Public Opinion Research
Abstract Previous research has shown that corruption diminishes citizens’ level of political support and engagement. We extend this line of reasoning and evaluate whether previous levels of perceive...
The Next Generation Virgo Cluster Survey. XXXIII. Stellar Population Gradients in the Virgo Cluster Core Globular Cluster System
Authors: Susana Eyheramendy, Andrés Jordán, Laura Ferrarese et al.
Year: 2022Source: The Astrophysical Journal
Abstract We present a study of the stellar populations of globular clusters (GCs) in the Virgo Cluster core with a homogeneous spectroscopic catalog of 692 GCs within a major-axis distance R maj = 840...
Improving matrix-vector multiplication via lossless grammar-compressed matrices
Authors: Gonzalo Navarro, Travis Gagie, Dominik Köppl et al.
Year: 2022Source: Proceedings of the VLDB Endowment
As nowadays Machine Learning (ML) techniques are generating huge data collections, the problem of how to efficiently engineer their storage and operations is becoming of paramount importance. In this ...
Reevaluando los diseños institucionales: El efecto del presidencialismo sobre la corrupción
Authors: Sergio Toro
Year: 2022Source: Revista Chilena de Derecho y Ciencia Política
La presente nota de investigación analiza la incidencia de las va-riables institucionales sobre el Índice de Percepción de la Corrupción (CPI). Utilizando la metodología de paressobre una base de...
Technical Perspective-No PANE, No Gain: Scaling Attributed Network Embedding in a Single Server
Authors: Aidan Hogan
Year: 2022Source: ACM SIGMOD Record
The machine learning community has traditionally been proactive in developing techniques for diverse types of data, such as text, audio, images, videos, time series, and, of course, matrices, tensors,...
Identifying and Characterizing New Expressions of Community Framing during Polarization
Authors: Bárbara Poblete, Hernán Sarmiento, Felipe Bravo-Márquez et al.
Year: 2022Source: Proceedings of the International AAAI Conference on Web and Social Media
Chile experienced a series of important protests between October and December 2019. This social unrest, as it was called, was fueled by social inequity and radically affected the nation's status quo. ...
Knowledge Graphs: A Guided Tour
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2022Source: International Research School in Artificial Intelligence in Bergen (AIB 2022)
Tracking the historical events that lead to the interweaving of data and knowledge.
Multilayer graphs
Authors: Aidan Hogan, Renzo Angles, Domagoj Vrgoč et al.
Year: 2022
In this short position paper, we argue that there is a need for a unifying data model that can support popular graph formats such as RDF, RDF* and property graphs, while at the same time being powerfu...
Technical perspective: The compression power of the BWT
Authors: Gonzalo Navarro
Year: 2022Source: Communications of the ACM
No abstract available.
Slicing of Probabilistic Programs based on Specifications
Authors: Marcelo Navarro, Federico Olmedo
Year: 2022Source: Science of Computer Programming
Plausible sealing for gradual parametricity
Authors: Elizabeth Labrada, Matías Toro, Eric Tanter et al.
Year: 2022Source: Proceedings of the ACM on Programming Languages-PACMPL
Graduality and parametricity have proven to be extremely challenging notions to bring together. Intuitively, enforcing parametricity gradually requires possibly sealing values in order to detect viola...
CORE: a Complex Event Recognition Engine
Authors: Marco Bucchi, Alejandro Grez, Andrés Quintana et al.
Year: 2022Source: VLDB 2022
Complex Event Recognition (CER) systems are a prominent technology for finding user-defined query patterns over large data streams in real time. CER query evaluation is known to be computationally cha...
Towards Effective Blended Learning Through the Eyes of Students: A Survey Study in Transition into Face-to-Face Education
Authors: Jorge Baier, Isabel Hilliger, Gabriel Astudillo et al.
Year: 2022Source: Educating for a new future: Making sense of technology-enhaced learning adoption. EC-TEL 2022
Squeeze: Efficient compact fractals for tensor core GPUs
Authors: Benjamín Bustos, Felipe A. Quezada, Cristóbal A. Navarro et al.
Year: 2022Source: Future Generation Computer Systems
Time- and Space-Efficient Regular Path Queries
Authors: Aidan Hogan, Gonzalo Navarro, Diego Arroyuelo et al.
Year: 2022Source: 2022 IEEE 38th International Conference on Data Engineering (ICDE)
We introduce a time- and space-efficient technique to solve regular path queries over labeled (RDF) graphs. We combine a bit-parallel simulation of the Glushkov automaton of the regular expression wit...
Exploration of Knowledge Graphs via Online Aggregation
Authors: Aidan Hogan, Benny Kimelfeld, Oren Kalinsky et al.
Year: 2022Source: 2022 IEEE 38th International Conference on Data Engineering (ICDE)
Exploration systems over large-scale RDF knowl-edge graphs often rely on aggregate count queries to indicate how many results the user can expect for the possible next steps of exploration. Such syste...
Temporal Regular Path Queries
Authors: Marcelo Arenas, Julia Stoyanovich, Pedro Bahamondes et al.
Year: 2022Source: 2022 IEEE 38th International Conference on Data Engineering (ICDE)
In the last decade, substantial progress has been made towards standardizing the syntax of graph query languages, and towards understanding their semantics and complexity of evaluation. In this paper,...
12th Temporal Web Analytics Workshop (TempWeb) Overview
Authors: Ricardo Baeza-Yates, Marc Spaniol, Ómar Alonso
Year: 2022Source: Companion Proceedings of the The Web Conference 2018
TempWeb focuses on investigating infrastructures, scalable methods, and innovative software for aggregating, querying, and analyzing heterogeneous data at Web scale. Emphasis is given to data analysis...
Correction to: Graph Compression for Adjacency-Matrix Multiplication
Authors: Gonzalo Navarro, Travis Gagie, Dominik Köppl et al.
Year: 2022Source: SN Computer Science
Gobernanza Criminal y la Crisis de los Estados Latinoamericanos Contemporáneos
Authors: Juan Pablo Luna, Andreas Feldmann
Year: 2022Source: Annual Review of Sociology
Crecientemente las sociedades latinoamericanas enfrentan el surgimiento de nuevos órdenes en que los funcionarios estatales y las autoridades políticas comparten el poder con organizaciones criminal...
DWUG ES: Diachronic Word Usage Graphs for Spanish
Authors: Felipe Bravo-Márquez, Frank D. Zamora-Reina, Dominik Schlechtweg
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
This data collection contains diachronic Word Usage Graphs (WUGs) for Spanish. Find a description of the data format, code to process the data and further datasets on the WUGsite. Please find more inf...
DWUG ES: Diachronic Word Usage Graphs for Spanish
Authors: Felipe Bravo-Márquez, Frank D. Zamora-Reina, Dominik Schlechtweg
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
This data collection contains diachronic Word Usage Graphs (WUGs) for Spanish. Find a description of the data format, code to process the data and further datasets on the WUGsite. Please find more inf...
DWUG ES: Diachronic Word Usage Graphs for Spanish
Authors: Felipe Bravo-Márquez, Frank D. Zamora-Reina, Dominik Schlechtweg
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
This data collection contains diachronic Word Usage Graphs (WUGs) for Spanish. Find a description of the data format, code to process the data and further datasets on the WUGsite. Please find more inf...
DWUG ES: Diachronic Word Usage Graphs for Spanish
Authors: Felipe Bravo-Márquez, Frank D. Zamora-Reina, Dominik Schlechtweg
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
This data collection contains diachronic Word Usage Graphs (WUGs) for Spanish. Find a description of the data format, code to process the data and further datasets on the WUGsite. Please find more inf...
DWUG ES: Diachronic Word Usage Graphs for Spanish
Authors: Felipe Bravo-Márquez, Frank D. Zamora-Reina, Dominik Schlechtweg
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
This data collection contains diachronic Word Usage Graphs (WUGs) for Spanish. Find a description of the data format, code to process the data and further datasets on the WUGsite. Please find more inf...
Automatic Extraction of Nested Entities in Clinical Referrals in Spanish
Authors: Felipe Bravo-Márquez, Jocelyn Dunstan, Fabián Villena et al.
Year: 2022Source: ACM Transactions on Computing for Healthcare
Here we describe a new clinical corpus rich in nested entities and a series of neural models to identify them. The corpus comprises de-identified referrals from the waiting list in Chilean public hosp...
Criminal Governance and the Crisis of Contemporary Latin American States
Authors: Juan Pablo Luna, Andreas Feldmann
Year: 2022Source: Annual Review of Sociology
Across Latin America, societies are confronting the rise of novel orders in which state officials and political authorities share power with criminal organizations. Criminal governance (i.e., the crea...
Social Media and Belief in Misinformation in Mexico: A Case of Maximal Panic, Minimal Effects?
Authors: Sebastián Valenzuela, Marcelo Santos, Carlos Múñiz
Year: 2022Source: The International Journal of Press/Politics
Contrary to popular narratives, it is not clear whether using social media for news increases belief in political misinformation. Several of the most methodologically sound studies find small to nonex...
Similarity-Based Explanations meet Matrix Factorization via Structure-Preserving Embeddings
Authors: Denis Parra, Leandro Balby Marinho, Rodrygo L. T. Santos et al.
Year: 2022
Embeddings are core components of modern model-based Collaborative Filtering (CF) methods, such as Matrix Factorization (MF) and Deep Learning variations. In essence, embeddings are mappings of the or...
Graph Compression for Adjacency-Matrix Multiplication
Authors: Gonzalo Navarro, Travis Gagie, Dominik Köppl et al.
Year: 2022Source: SN Computer Science
Abstract Computing the product of the (binary) adjacency matrix of a large graph with a real-valued vector is an important operation that lies at the heart of various graph analysis tasks, such as com...
DWUG ES: Diachronic Word Usage Graphs for Spanish
Authors: Felipe Bravo-Márquez, Frank D. Zamora-Reina, Dominik Schlechtweg
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
This data collection contains diachronic Word Usage Graphs (WUGs) for Spanish. Find a description of the data format, code to process the data and further datasets on the WUGsite. Please find more inf...
HOLZ: High-Order Entropy Encoding of Lempel-Ziv Factor Distances
Authors: Gonzalo Navarro, Dominik Köppl, Nicola Prezza
Year: 2022
We propose a new representation of the offsets of the Lempel-Ziv (LZ) factorization based on the co-lexicographic order of the text's prefixes. The selected offsets tend to approach the k-th order emp...
Answer-Set Programs for Reasoning about Counterfactual Interventions and Responsibility Scores for Classification
Authors: Leopoldo Bertossi, Gabriela Reyes, Gabriela de los Ángeles Díaz Reyes
Year: 2022Source: Inductive Logic Programming (ILP 2021)
Optimal Joins Using Compressed Quadtrees
Authors: Juan Reutter, Gonzalo Navarro, Diego Arroyuelo et al.
Year: 2022Source: ACM Transactions on Database Systems
Worst-case optimal join algorithms have gained a lot of attention in the database literature. We now count several algorithms that are optimal in the worst case, and many of them have been implemented...
Language Modeling on Location-Based Social Networks
Authors: Bárbara Poblete, Felipe Bravo-Márquez, Juglar Diaz
Year: 2022Source: ISPRS International Journal of Geo-Information
The popularity of mobile devices with GPS capabilities, along with the worldwide adoption of social media, have created a rich source of text data combined with spatio-temporal information. Text data ...
Ethical Challenges in AI
Authors: Ricardo Baeza-Yates
Year: 2022Source: Proceedings of the Fifteenth ACM International Conference on Web Search and Data Mining
In the first part we address four current specific challenges through examples: (1) discrimination (e.g., facial recognition, justice, sharing economy, language models); (2) stupid models (e.g., lack ...
Natural Language Processing Of Helpline Chat Data Before And During The Pandemic Revealed Significant Decrease In Self-image Appreciation And Changes In Other Traits
Authors: Susana Eyheramendy, Fernanda Barriga, María P. Raveau et al.
Year: 2022
During the last two years the COVID-19 pandemic has affected the world population in several ways. An important increase in mental health problems is a consequence of this pandemic that is ubiquitous ...
A Survey on Deep Learning and Explainability for Automatic Report Generation from Medical Images
Authors: Álvaro Soto, Cecilia Besa, Pablo Pino et al.
Year: 2022Source: ACM Computing Surveys
Every year physicians face an increasing demand of image-based diagnosis from patients, a problem that can be addressed with recent artificial intelligence methods. In this context, we survey works in...
For better and for worse: A panel survey of how mobile-only and hybrid Internet use affects digital skills over time
Authors: Sebastián Valenzuela, Teresa Correa, Isabel Pavez
Year: 2022Source: New Media & Society
Public policies across the world are tackling Internet access inequality through mobile connections, which has led to an increase in mobile-only use. However, digital skills remain as a stumbling bloc...
Spanish SciELO Crawled Biomedical Corpus
Authors: Jocelyn Dunstan, Fabián Villena, Carolina Chiu
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
We present a corpus of Spanish medical articles extracted from the SciELO website (https://scielo.cl/). The corpus was constructed using web scraping extraction techniques and consists of 5694 article...
Spanish SciELO Crawled Biomedical Corpus
Authors: Jocelyn Dunstan, Fabián Villena, Carolina Chiu
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
We present a corpus of Spanish medical articles extracted from the SciELO website (https://scielo.cl/). The corpus was constructed using web scraping extraction techniques and consists of 5694 article...
Semantics and canonicalisation of SPARQL 1.1
Authors: Aidan Hogan, Jaime Salas
Year: 2022Source: Semantic Web
We define a procedure for canonicalising SPARQL 1.1 queries. Specifically, given two input queries that return the same solutions modulo variable names over any RDF graph (which we call congruent quer...
Cultural, scientific and technical antecedents of the Cybersyn project in Chile
Authors: Claudio Gutiérrez, Juan David Ortega-Alvarez
Year: 2022Source: AI & Society
Morbimortality assessment in abdominal surgery: are we predicting or overreacting?
Authors: Sebastián Valenzuela, Daniel Rosselló-Jiménez, Ricardo Nassar et al.
Year: 2022Source: BMC Surgery
Abstract Background High-risk surgical procedures represent a fundamental part of general surgery practice due to its significant rates of morbidity and mortality. Different predictive tools have been...
A comprehensive review of the video-to-text problem
Authors: Jorge Pérez, Benjamín Bustos, Ivan Sipiran et al.
Year: 2022Source: Artificial Intelligence Review
CLNews19-20: A new dataset for rumor detection in Spanish
Authors: Marcelo Mendoza, Eliana Providel, Daniel Toro-González et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
We create CLNews, a dataset for rumor detection in Spanish. Based on fact-checking agencies' data, we mapped related tweets to verify news into four categories: non-rumor, true rumor, false rumor, and...
CLNews19-20: A new dataset for rumor detection in Spanish
Authors: Marcelo Mendoza, Eliana Providel, Daniel Toro-González et al.
Year: 2022Source: Zenodo (CERN European Organization for Nuclear Research)
We create CLNews, a dataset for rumor detection in Spanish. Based on fact-checking agencies' data, we mapped related tweets to verify news into four categories: non-rumor, true rumor, false rumor, and...
Efficient and compact representations of some non-canonical prefix-free codes
Authors: Gonzalo Navarro, Travis Gagie, Antonio Fariña et al.
Year: 2022Source: Theoretical Computer Science
Reactive and Asymmetric Communication Flows: Social Media Discourse and Partisan News Framing in the Wake of Mass Shootings
Authors: Sebastián Valenzuela, Dhavan V. Shah, Jon Pevehouse et al.
Year: 2022Source: The International Journal of Press/Politics
Marked by both deep interconnectedness and polarization, the contemporary media system in the United States features news outlets and social media that are bound together, yet deeply divided along par...
Universal coding and prediction on ergodic random points
Authors: Lukasz Debowski, Tomasz Steifer
Year: 2022Source: Bulletin of Symbolic Logic
A Universal Screening Tool for Dyslexia by a Web-Game and Machine Learning
Authors: Ricardo Baeza-Yates, Luz Rello, Maria Rauschenberger
Year: 2022Source: Frontiers in Computer Science
Children with dyslexia have difficulties learning how to read and write. They are often diagnosed after they fail school even if dyslexia is not related to general intelligence. Early screening of dys...
Knowledge-based programs as building blocks for planning
Authors: Jorge Baier, Sheila A. McIlraith
Year: 2022Source: Artificial Intelligence
3 Overview of Talks 3.1 SHAP Explanations with Booleans Circuit Classifiers
Authors: Leopoldo Bertossi
Year: 2022Source: Dagstuhl Reports
Score-Based Explanations in Data Management and Machine Learning: An Answer-Set Programming Approach to Counterfactual Analysis
Authors: Leopoldo Bertossi
Year: 2022Source: Reasoning Web. Declarative Artificial Intelligence. Reasoning Web 2021
Data Graphs
Authors: Roberto Navigli, Michael Cochez, Anisa Rula et al.
Year: 2022Source: Synthesis lectures on data, semantics and knowledge
At the foundation of any knowledge graph is the principle of first applying a graph abstraction to data, resulting in an initial data graph. We now discuss a selection of graph-structured data models ...
Introduction
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2022Source: Synthesis lectures on data, semantics and knowledge
Though the phrase "knowledge graph" has been used in the literature since at least 1972 [Schneider, 1973], the modern incarnation of the phrase stems from the 2012 announcement of the Google Knowledge...
Publication
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2022Source: Synthesis lectures on data, semantics and knowledge
While it may not always be desirable to publish knowledge graphs (for example, those that offer a competitive advantage to a company [Noy et al., 2019]), it maybe desirable or even required to publish...
Deductive Knowledge
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2022Source: Synthesis lectures on data, semantics and knowledge
As humans, we can deduce more from the data graph of Figure 2.1 than what the edges explicitly indicate. We may deduce, for example, that the $${\rm{\tilde N}}$$ am festival ((eidis)) will be located ...
Inductive Knowledge
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2022Source: Synthesis lectures on data, semantics and knowledge
While deductive knowledge is characterized by precise logical consequences, inductively acquiring knowledge involves generalizing patterns from a given set of input observations, which can then be use...
Refinement
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2022Source: Synthesis lectures on data, semantics and knowledge
Beyond assessing the quality of a knowledge graph, there exist techniques to refine the knowledge graph, in particular to (semi-)automatically complete and correct the knowledge graph [Paul-heim, 2017...
Schema, Identity, and Context
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2022Source: Synthesis lectures on data, semantics and knowledge
In this chapter we describe extensions of the data graph–relating to schema, identity, and context–that provide additional structures for accumulating knowledge. Henceforth, we refer to a data gra...
Creation and Enrichment
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2022Source: Synthesis lectures on data, semantics and knowledge
In this chapter, we discuss the principal techniques by which knowledge graphs can be created and subsequently enriched from diverse sources of legacy data that range from plain text to structured for...
Knowledge Graphs in Practice
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2022Source: Synthesis lectures on data, semantics and knowledge
In this chapter, we discuss some of the most prominent knowledge graphs that have emerged in the past years. We begin by discussing open knowledge graphs, most of which have been published on the Web ...
Conclusions
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2022Source: Synthesis lectures on data, semantics and knowledge
We have provided a comprehensive introduction to knowledge graphs, which have been receiving more and more attention in recent years. Under the definition of a knowledge graph as a graph ofdata intend...
Knowledge Graphs
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2022Source: Synthesis lectures on data, semantics and knowledge
This book provides a comprehensive and accessible introduction to knowledge graphs, which have recently garnered notable attention from both industry and academia. Knowledge graphs are founded on the
WDBench: A Wikidata Graph Query Benchmark
Authors: Aidan Hogan, Carlos Buil-Aranda, Renzo Angles et al.
Year: 2022Source: Lecture notes in computer science
The Semantic Web – ISWC 2022
Authors: Aidan Hogan, Claudia d’Amato, Giuseppe Pirró et al.
Year: 2022Source: Lecture notes in computer science
truthy_direct_properties.nt.bz2
Authors: Aidan Hogan, Renzo Angles, Domagoj Vrgoč et al.
Year: 2022Source: Figshare
Wikidata truthy direct properties
Quality Assessment
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2022Source: Synthesis lectures on data, semantics and knowledge
Independent of the (kinds of) source(s) from which a knowledge graph is created, the resulting initial knowledge graph will usually be incomplete, and will often contain duplicate, contradictory or ev...
A Critical Analysis Of Nlp and Clinical Correctness Metrics to Measure Progress on X-Ray Report Generation
Authors: Denis Parra, Jocelyn Dunstan, Cecilia Besa et al.
Year: 2022Source: SSRN Electronic Journal
Background: Radiologists face an increasing demand for image-based diagnosis from patients every year,and computer-aided diagnosis systems seem like a promising way to alleviate their workload. Many a...
Trie-Compressed Intersectable Sets
Authors: Diego Arroyuelo, Juan P. Castillo
Year: 2022Source: arXiv (Cornell University)
We introduce space- and time-efficient algorithms and data structures for the offline set intersection problem. We show that a sorted integer set $S \subseteq [0{..}u)$ of $n$ elements can be represen...
PG-Schema: Schemas for Property Graphs
Authors: Renzo Angles, Domagoj Vrgoč, Juan Sequeda et al.
Year: 2022Source: arXiv (Cornell University)
Property graphs have reached a high level of maturity, witnessed by multiple robust graph database systems as well as the ongoing ISO standardization effort aiming at creating a new standard Graph Que...
Improving Matrix-vector Multiplication via Lossless Grammar-Compressed Matrices
Authors: Gonzalo Navarro, Travis Gagie, Dominik Köppl et al.
Year: 2022Source: arXiv (Cornell University)
As nowadays Machine Learning (ML) techniques are generating huge data collections, the problem of how to efficiently engineer their storage and operations is becoming of paramount importance. In this ...
Balancing Run-Length Straight-Line Programs*
Authors: Gonzalo Navarro, Francisco Javier Vidal Olivares, C. Urbina
Year: 2022Source: arXiv (Cornell University)
It was recently proved that any SLP generating a given string $w$ can be transformed in linear time into an equivalent balanced SLP of the same asymptotic size. We show that this result also holds for...
Computing MEMs and Relatives on Repetitive Text Collections
Authors: Gonzalo Navarro
Year: 2022Source: arXiv (Cornell University)
We consider the problem of computing the Maximal Exact Matches (MEMs) of a given pattern $P[1 .. m]$ on a large repetitive text collection $T[1 .. n]$, which is represented as a (hopefully much smalle...
Efficient Construction of the BWT for Repetitive Text Using String Compression
Authors: Gonzalo Navarro, Diego Díaz-Domínguez
Year: 2022Source: arXiv (Cornell University)
We present a new semi-external algorithm that builds the Burrows--Wheeler transform variant of Bauer et al. (a.k.a., BCR BWT) in linear expected time. Our method uses compression techniques to reduce ...
Near-Optimal Search Time in $δ$-Optimal Space, and Vice Versa
Authors: Gonzalo Navarro, Tomasz Kociumaka, Francisco Javier Vidal Olivares
Year: 2022Source: arXiv (Cornell University)
Two recent lower bounds on the compressibility of repetitive sequences, $\delta \le \gamma$, have received much attention. It has been shown that a length-$n$ string $S$ over an alphabet of size $\sig...
Space-efficient conversions from SLPs
Authors: Gonzalo Navarro, Travis Gagie
Year: 2022Source: arXiv (Cornell University)
We give algorithms that, given a straight-line program (SLP) with $g$ rules that generates (only) a text $T [1..n]$, builds within $O(g)$ space the Lempel-Ziv (LZ) parse of $T$ (of $z$ phrases) in tim...
L-systems for Measuring Repetitiveness*
Authors: Gonzalo Navarro, C. Urbina
Year: 2022Source: arXiv (Cornell University)
An L-system (for lossless compression) is a CPD0L-system extended with two parameters $d$ and $n$, which determines unambiguously a string $w = \tau(\varphi^d(s))[1:n]$, where $\varphi$ is the morphis...
Compact data structures to represent spatial hierarchical structures
Authors: Gonzalo Navarro, Diego Seco, M. Andrea Rodríguez et al.
Year: 2022Source: Figshare
Implementation of three compact data structures to represent spatial hierarchical structures, with applications on the topological model.<br>Datasets are also included
Replication Data for: Corruption and Political Knowledge Erosion. A Cautionary Tale from Latin America
Authors: Sebastián Valenzuela, Matías Bargsted, Ingrid Bachmann
Year: 2022Source: Harvard Dataverse
This study employs data from the two-wave face-to-face panel survey conducted by the authors of this study. The survey employed a probability-based sample representative of all adults (18 years or old...
Replication Data for: Corruption and Political Knowledge Erosion. A Cautionary Tale from Latin America
Authors: Sebastián Valenzuela, Matías Bargsted, Ingrid Bachmann
Year: 2022Source: Harvard Dataverse
This study employs a two-wave face-to-face panel survey data conducted by the authors of this study in Santiago, Chile. The survey employed a probability-based sample and is representative of all adul...
A Novel First-Order Autoregressive Moving Average Model to Analyze Discrete-Time Series Irregularly Observed
Authors: Susana Eyheramendy, Wilfredo Palma, César Ojeda et al.
Year: 2022Source: arXiv (Cornell University)
A novel first-order autoregressive moving average model for analyzing discrete-time series observed at irregularly spaced times is introduced. Under Gaussianity, it is established that the model is st...
GPC: A Pattern Calculus for Property Graphs
Authors: Domagoj Vrgoč, Leonid Libkin, Wim Martens et al.
Year: 2022Source: arXiv (Cornell University)
The development of practical query languages for graph databases runs well ahead of the underlying theory. The ISO committee in charge of database query languages is currently developing a new standar...
Evaluating regular path queries under the all-shortest paths semantics
Authors: Domagoj Vrgoč
Year: 2022Source: arXiv (Cornell University)
The purpose of this report is to explain how the textbook breadth-first search algorithm (BFS) can be modified in order to also create a compact representation of all shortest paths connecting a singl...
Representing Paths in Graph Database Pattern Matching
Authors: Domagoj Vrgoč, Stijn Vansummeren, Wim Martens et al.
Year: 2022Source: arXiv (Cornell University)
Modern graph database query languages such as GQL, SQL/PGQ, and their academic predecessor G-Core promote paths to first-class citizens in the sense that paths that match regular path queries can be r...
Gradual C0: Symbolic Execution for Gradual Verification
Authors: Eric Tanter, Joshua Sunshine, Jonathan Aldrich et al.
Year: 2022Source: arXiv (Cornell University)
Current static verification techniques support a wide range of programs. However, such techniques only support complete and detailed specifications, which places an undue burden on users. To solve thi...
Propositional Equality for Gradual Dependently Typed Programming
Authors: Eric Tanter, Joseph Eremondi, Ronald G. García
Year: 2022Source: arXiv (Cornell University)
Gradual dependent types can help with the incremental adoption of dependently typed code by providing a principled semantics for imprecise types and proofs, where some parts have been omitted. Current...
Slicing of Probabilistic Programs based on Specifications
Authors: Federico Olmedo, Marcelo Navarro
Year: 2022Source: arXiv (Cornell University)
This paper presents the first slicing approach for probabilistic programs based on specifications. We show that when probabilistic programs are accompanied by their specifications in the form of pre- ...
LSCDiscovery: A shared task on semantic change discovery and detection in Spanish
Authors: Felipe Bravo-Márquez, Frank D. Zamora-Reina, Dominik Schlechtweg
Year: 2022
We present the first shared task on semantic change discovery and detection in Spanish. We create the first dataset of Spanish words manually annotated by semantic change using the DURel framewok (Sch...
ALBETO and DistilBETO: Lightweight Spanish Language Models
Authors: Felipe Bravo-Márquez, Andrés Carvallo, Vladimir Araujo et al.
Year: 2022Source: arXiv (Cornell University)
In recent years there have been considerable advances in pre-trained language models, where non-English language versions have also been made available. Due to their increasing use, many lightweight v...
LSCDiscovery: A shared task on semantic change discovery and detection in Spanish
Authors: Felipe Bravo-Márquez, Frank D. Zamora-Reina, Dominik Schlechtweg
Year: 2022Source: arXiv (Cornell University)
We present the first shared task on semantic change discovery and detection in Spanish and create the first dataset of Spanish words manually annotated for semantic change using the DURel framework (S...
Evaluation Benchmarks for Spanish Sentence Representations
Authors: Marcelo Mendoza, Felipe Bravo-Márquez, Andrés Carvallo et al.
Year: 2022Source: arXiv (Cornell University)
Due to the success of pre-trained language models, versions of languages other than English have been released in recent years. This fact implies the need for resources to evaluate these models. In th...
Near-Optimal Search Time in $$\delta $$-Optimal Space
Authors: Gonzalo Navarro, Tomasz Kociumaka, Francisco Javier Vidal Olivares
Year: 2022Source: Lecture notes in computer science
Balancing Run-Length Straight-Line Programs
Authors: Gonzalo Navarro, Francisco Javier Vidal Olivares, C. Urbina
Year: 2022Source: Lecture notes in computer science
Compact data structures to represent spatial hierarchical structures
Authors: Gonzalo Navarro, Diego Seco, M. Andrea Rodríguez et al.
Year: 2022Source: Figshare
Implementation of three compact data structures to represent spatial hierarchical structures, with applications on the topological model.<br>For replication of the experiments, please, check the file ...
Compact data structures to represent spatial hierarchical structures
Authors: Gonzalo Navarro, Diego Seco, M. Andrea Rodríguez et al.
Year: 2022Source: Figshare
Implementation of three compact data structures to represent spatial hierarchical structures, with applications on the topological model.<br>For replication of the experiments, please, check the file ...
Clinical Flair: A Pre-Trained Language Model for Spanish Clinical Natural Language Processing
Authors: Jocelyn Dunstan, Fabián Villena, Matías Rojas
Year: 2022
Word embeddings have been widely used in Natural Language Processing (NLP) tasks. Although these representations can capture the semantic information of words, they cannot learn the sequence-level sem...
Divide and Conquer: An Extreme Multi-Label Classification Approach for Coding Diseases and Procedures in Spanish
Authors: Jocelyn Dunstan, Andrés Abeliuk, Matías Rojas et al.
Year: 2022
Clinical coding is the task of transforming medical documents into structured codes following a standard ontology. Since these terminologies are composed of hundreds of codes, this problem can be cons...
A Knowledge-Graph-Based Intrinsic Test for Benchmarking Medical Concept Embeddings and Pretrained Language Models
Authors: Jocelyn Dunstan, Fabián Villena, Matías Rojas et al.
Year: 2022
Using language models created from large data sources has improved the performance of several deep learning-based architectures, obtaining state-of-the-art results in several NLP extrinsic tasks. Howe...
DockerPedia: A Knowledge Graph of Software Images and Their Metadata
Authors: Maximiliano Osorio, Carlos Buil-Aranda, Idafen Santana-Perez et al.
Year: 2022Source: INTERNATIONAL JOURNAL OF SOFTWARE ENGINEERING AND KNOWLEDGE ENGINEERING
The Impact of United States Engagement with Chile: 2000-2020
Authors: Juan Pablo Luna, Bruna Fonseca de Barros
Year: 2022Source: SSRN Electronic Journal
This study examines the diversity, scale, and impacts of efforts undertaken by the U.S. government and civil society to boost prosperity in Chile. It provides quantitative assessments of resource flow...
Replication Data for Local Government, Social Media and Management of COVID-19: The Case of Chilean Mayoral Communication
Authors: Sergio Toro, Sebastián Valenzuela, Juan Pablo Luna et al.
Year: 2022Source: Harvard Dataverse
Code and data of the analysis and result of the paper
Expressiveness and Approximation Properties of Graph Neural Networks
Authors: Juan Reutter, Floris Geerts
Year: 2022Source: arXiv (Cornell University)
Characterizing the separation power of graph neural networks (GNNs) provides an understanding of their limitations for graph learning tasks. Results regarding separation power are, however, usually ge...
Answer-Set Programs for Repair Updates and Counterfactual Interventions
Authors: Leopoldo Bertossi
Year: 2022Source: arXiv (Cornell University)
We briefly describe -- mainly through very simple examples -- different kinds of answer-set programs with annotations that have been proposed for specifying: database repairs and consistent query answ...
On Computing Probabilistic Explanations for Decision Trees
Authors: Pablo Barceló, Marcelo Arenas, Bernardo Subercaseaux et al.
Year: 2022Source: arXiv (Cornell University)
Formal XAI (explainable AI) is a growing area that focuses on computing explanations with mathematical guarantees for the decisions made by ML models. Inside formal XAI, one of the most studied cases ...
Graph Path Navigation
Authors: Pablo Barceló, Marcelo Arenas, Leonid Libkin
Year: 2022Source: Encyclopedia of Big Data Technologies
Empirical Evaluation of Machine Learning Ensembles for Rumor Detection
Authors: Marcelo Mendoza, Eliana Providel, Andrés Zapata
Year: 2022Source: Lecture notes in computer science
Weisfeiler and Leman Go Relational
Authors: Pablo Barceló, Mikhail Galkin, Christopher G. Morris et al.
Year: 2022Source: arXiv (Cornell University)
Knowledge graphs, modeling multi-relational data, improve numerous applications such as question answering or graph logical reasoning. Many graph neural networks for such data emerged recently, often ...
No Agreement Without Loss: Learning and Social Choice in Peer Review
Authors: Pablo Barceló, Tomasz Steifer, Cristóbal Rojas et al.
Year: 2022Source: arXiv (Cornell University)
In peer review systems, reviewers are often asked to evaluate various features of submissions, such as technical quality or novelty. A score is given to each of the predefined features and based on th...
An Algebra for Path Manipulation in Graph Databases
Authors: Renzo Angles, Roberto García
Year: 2022Source: Lecture notes in computer science
Lenguajes y modelos subyacentes a los grafos de conocimiento
Authors: Renzo Angles
Year: 2022Source: Actas del Congreso Internacional de Ingeniería de Sistemas
Un grafo de conocimiento es una gran base de datos que integra información desde distintas fuentes de datos, con el objetivo de poder extraer conocimiento y transformarlo en valor para los usuarios. ...
Bots don't Vote, but They Surely Bother! A Study of Anomalous Accounts in a National Referendum
Authors: Ricardo Baeza-Yates, Eduardo Graells-Garrido
Year: 2022Source: arXiv (Cornell University)
The Web contains several social media platforms for discussion, exchange of ideas, and content publishing. These platforms are used by people, but also by distributed agents known as bots. Although bo...
Assessing the Limits of Straightforward Models for Nested Named Entity Recognition in Spanish Clinical Narratives
Authors: Jocelyn Dunstan, Matías Rojas, Aitor Gonzalez‐Agirre et al.
Year: 2022
Nested Named Entity Recognition (NER) is an information extraction task that aims to identify entities that may be nested within other entity mentions. Despite the availability of several corpora with...
Scaling up ML-based Black-box Planning with Partial STRIPS Models
Authors: Jorge Baier, Matias Greco, Hector H. Palacios et al.
Year: 2022Source: arXiv (Cornell University)
A popular approach for sequential decision-making is to perform simulator-based search guided with Machine Learning (ML) methods like policy learning. On the other hand, model-relaxation heuristics ca...
Amplifying Counter-Public Spheres on Social Media: News Sharing of Alternative Versus Traditional Media After the 2019 Chilean Uprising
Authors: Sergio Toro, Sebastián Valenzuela, Juan Pablo Luna
Year: 2022Source: Social Media + Society
While much research exists on the role of digital media use in protest movements, few studies compare the long-term impact of protests on online use of alternative and mainstream digital media. This h...
A Scalable and Energy Efficient GPU Thread Map for m-Simplex Domains
Authors: Benjamín Bustos, Felipe A. Quezada, Cristóbal A. Navarro et al.
Year: 2022Source: arXiv (Cornell University)
This work proposes a new GPU thread map for $m$-simplex domains, that scales its speedup with dimension and is energy efficient compared to other state of the art approaches. The main contributions of...
Squeeze: Efficient Compact Fractals for Tensor Core GPUs
Authors: Cristóbal A. Navarro, Nancy Hitschfeld, Benjamín Bustos et al.
Year: 2022Source: arXiv (Cornell University)
This work presents Squeeze, an efficient compact fractal processing scheme for tensor core GPUs. By combining discrete-space transformations between compact and expanded forms, one can do data-paralle...
Squeeze: Efficient Compact Fractals for Tensor Core Gpus
Authors: Benjamín Bustos, Felipe A. Quezada, Cristóbal A. Navarro et al.
Year: 2022Source: SSRN Electronic Journal
This work presents Squeeze, an efficient compact fractal processing scheme for tensor core GPUs. By combining discrete-space transformations between compact and expanded forms, one can do data-paralle...
Resources for Multilingual Hate Speech Detection
Authors: Jorge Pérez, Bárbara Poblete, Magdalena Saldaña et al.
Year: 2022
Most of the published approaches and resources for hate speech detection are tailored for the English language. In consequence, cross-lingual and cross-cultural perspectives lack some essential resour...
Cross-Lingual and Cross-Domain Crisis Classification for Low-Resource Scenarios
Authors: Jorge Pérez, Bárbara Poblete, Hernán Sarmiento et al.
Year: 2022Source: arXiv (Cornell University)
Social media data has emerged as a useful source of timely information about real-world crisis events. One of the main tasks related to the use of social media for disaster management is the automatic...
DockerPedia: A Knowledge Graph of Software Images and Their Metadata
Authors: Carlos Buil-Aranda, Daniel Garijo, Maximiliano Osorio et al.
Year: 2022Source: International Journal of Software Engineering and Knowledge Engineering
An increasing amount of researchers use software images to capture the requirements and code dependencies needed to carry out computational experiments. Software images preserve the computational envi...
Knowledge Graph Compression for Big Semantic Data
Authors: Claudio Gutiérrez, Miguel A. Martínez‐Prieto, Javier D. Fernández et al.
Year: 2022Source: Encyclopedia of Big Data Technologies
Educational Tools for Mapuzugun
Authors: Claudio Gutiérrez, Antonios Anastasopoulos, Cristian Ahumada
Year: 2022
Mapuzugun is the language of the Mapuche people. Due to political and historical reasons, its number of speakers has decreased and the language has been excluded from the educational system in Chile a...
Educational Tools for Mapuzugun
Authors: Claudio Gutiérrez, Antonios Anastasopoulos, Cristian Ahumada
Year: 2022Source: arXiv (Cornell University)
Mapuzugun is the language of the Mapuche people. Due to political and historical reasons, its number of speakers has decreased and the language has been excluded from the educational system in Chile a...
Constant-delay enumeration for SLP-compressed documents
Authors: Cristian Riveros, Martı́n Muñoz
Year: 2022Source: arXiv (Cornell University)
We study the problem of enumerating results from a query over a compressed document. The model we use for compression are straight-line programs (SLPs), which are defined by a context-free grammar tha...
Publications for 2021
Displaying 332 publication(s) for 2021
Miopía y Astigmatismo miópico en escolares
Authors: Jocelyn Dunstan, Magdalena Bastías, Rodolfo Villena M. et al.
Year: 2021Source: Andes pediatrica
Worldwide, there is an epidemic increase in myopia. In children, the evidence points to a lack of ex posure to natural light. In Chile, the population situation of myopia in children is unknown. Objec...
Adaptación de una metodología de especificaciones en la calificación y retroalimentación en la enseñanza de cursos de ciencias básicas en una carrera de la salud para mejorar los aprendizajes y la motivación
Authors: Jocelyn Dunstan, Héctor Vega, Víctor Mauricio Castañeda Rodríguez et al.
Year: 2021Source: ARS MEDICA Revista de Ciencias Médicas
Introducción: la enseñanza de cursos de ciencias básicas en carreras de la salud es un desafío por no estar directa e inmediatamente relacionada con el ámbito profesional. Por otra parte, las con...
A practical succinct dynamic graph representation
Authors: Luís M. S.Russo, Alexandre P. Francisco, Miguel E. Coimbra et al.
Year: 2021Source: Information and Computation
Declarative Approaches to Counterfactual Explanations for Classification
Authors: Leopoldo Bertossi
Year: 2021Source: Theory and Practice of Logic Programming
Abstract We propose answer-set programs that specify and compute counterfactual interventions on entities that are input on a classification model. In relation to the outcome of the model, the resulti...
Boosting perturbation-based iterative algorithms to compute the median string
Authors: Diego Seco, Pedro Mirabal, José Abreu et al.
Year: 2021
A Neural Networks Approach to SPARQL Query Performance Prediction
Authors: Carlos Buil-Aranda, Daniel Arturo Casal Amat, Carlos Valle-Vidal
Year: 2021
Las condiciones sociohistóricas de América Latina
Authors: Sergio Toro, Danny Monsalve, Noelia Carrasco y Rodrigo Pulgar
Year: 2021
Surnames and Social Rank: Long-term Traits of Social Mobility in Colombia and Chile
Authors: Naim Bro, Juliana Jaramillo, Andrés Álvarez
Year: 2021
Is it Possible to Verify if a Transaction is Spendable?
Authors: Marcelo Arenas, Juan Reutter, Domagoj Vrgoč et al.
Year: 2021Source: Frontiers in Blockchain
With the popularity of Bitcoin, there is a growing need to understand the functionality, security, and performance of various mechanisms that comprise it. In this paper, we analyze Bitcoin’s scripti...
Indigenous Movements, Parties, And the State: Comparative Lessons From Latin America
Authors: Carla Alberti
Year: 2021
Introduction
Authors: Juan Pablo Luna, Fernando Rosenblatt, Gabriel Vommaro et al.
Year: 2021Source: Cambridge University Press eBooks
There is currently a resurgence of interest in political parties. This resurgent interest embraces a minimalist definition of political party, according to which any group that competes in elections a...
Name Index
Authors: Juan Pablo Luna, Fernando Rosenblatt, Gabriel Vommaro et al.
Year: 2021Source: Cambridge University Press eBooks
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References
Authors: Juan Pablo Luna, Fernando Rosenblatt, Gabriel Vommaro et al.
Year: 2021Source: Cambridge University Press eBooks
A summary is not available for this content so a preview has been provided. Please use the Get access link above for information on how to access this content.
Organization Index
Authors: Juan Pablo Luna, Fernando Rosenblatt, Gabriel Vommaro et al.
Year: 2021Source: Cambridge University Press eBooks
A summary is not available for this content so a preview has been provided. Please use the Get access link above for information on how to access this content.
Conclusions
Authors: Juan Pablo Luna, Fernando Rosenblatt, Gabriel Vommaro et al.
Year: 2021Source: Cambridge University Press eBooks
This final chapter of the edited volume summarizes each case study’s main contributions. It also provides comparative insights concerning the determinants of the presence or absence of a given type ...
Subject Index
Authors: Juan Pablo Luna, Fernando Rosenblatt, Gabriel Vommaro et al.
Year: 2021Source: Cambridge University Press eBooks
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The Chilean PPD: A Loose Confederation of Leaders
Authors: Sergio Toro, Fernando Rosenblatt, Rafael Piñeiro Rodríguez
Year: 2021Source: Cambridge University Press eBooks
This chapter describes the Chilean Partido por la Democracia (Party for Democracy, PPD) as a group of independents. Since its inception during the transition to democracy, the PPD has achieved meaning...
A Formal Framework for Complex Event Recognition
Authors: Alejandro Grez, Cristian Riveros, Stijn Vansummeren et al.
Year: 2021Source: ACM Transactions on Database Systems
Complex event recognition (CER) has emerged as the unifying field for technologies that require processing and correlating distributed data sources in real time. CER finds applications in diverse doma...
Youth environmental activism in the age of social media: the case of Chile (2009-2019)
Authors: Sebastián Valenzuela, Andrés Scherman, Sebastián Rivera
Year: 2021Source: Journal of Youth Studies
Between 2009 and 2019, Chile experienced the rise and fall of a powerful and influential environmental movement. This movement spurred massive protests against large-scale energy and mining projects, ...
Predicting SPARQL Query Dynamics
Authors: Aidan Hogan, Alberto Moya Loustaunau, A. Moya
Year: 2021
Given historical versions of an RDF graph, we propose and compare several methods to predict whether or not the results of a SPARQL query will change for the next version. Unsurprisingly, we find that...
You Are Fake News! Factors Impacting Journalists’ Debunking Behaviors on Social Media
Authors: Magdalena Saldaña, Hong Tien Vu
Year: 2021Source: Digital Journalism
Nowadays, misinformation and hoaxes travel faster than they did in the past, mostly thanks to the emergence of digital platforms and the popularization of social networking sites. Scholars have found ...
Matrix Query Languages
Authors: Cristian Riveros, Domagoj Vrgoč, Thomas Muñoz et al.
Year: 2021Source: ACM SIGMOD Record
Due to the importance of linear algebra and matrix operations in data analytics, there has been a renewed interest in developing query languages that combine both standard relational operations and li...
Report on the 44th international ACM SIGIR conference on research and development in information retrieval (SIGIR 2021)
Authors: Bárbara Poblete, Torsten Suel, Bhaskar Mitra et al.
Year: 2021Source: ACM SIGIR Forum
ACM SIGIR 2021 conference was organized as a fully online event, with more than 1,000 attendees from dozens of countries, a large technical program, and several activities and initiatives not seen at ...
El papel de las representaciones en la pantalla de GeoGebra en el trabajo matemático del aula. Investigación colaborativa en torno a la enseñanza de funciones en la Escuela Secundaria
Authors: Juan Pablo Luna, Marina Andrés, Enrique Di Rico et al.
Year: 2021Source: Educación Matemática
This article discusses phenomena related to the mathematical production of students when solving function problems on their computers.The selected scope consists of a collaborative investigation betwe...
Report on the 11th international workshop on location and the web (LocWeb 2021) and the 11th temporal web analytics workshop (TempWeb2021) at WWW2021
Authors: Ricardo Baeza-Yates, Marc Spaniol, Ómar Alonso et al.
Year: 2021Source: ACM SIGIR Forum
LocWeb and TempWeb 2021 were the eleventh events in their workshop series and took place co-located on 12 th April 2021 in conjunction with The Web Conference WWW 2021. They were intended to be held i...
Improved structures to solve aggregated queries for trips over public transportation networks
Authors: María Andrea Rodríguez, Nieves Brisaboa, Antonio Fariña et al.
Year: 2021
Knowledge-based programs as building blocks for planning
Authors: Jorge Baier, Sheila A. McIlraith
Year: 2021Source: Artificial Intelligence
Parametric Sensitivity in Graph Neural Network for Urban Cluster Detection, a Case Study
Authors: Marcelo Mendoza, Hans Löbel, Naim Bro
Year: 2021
Counter a Reactive Media System
Authors: Sebastián Valenzuela, Dhavan Shah, Yini Zhang et al.
Year: 2021
Genomic insights into the recent population history of Mapuche Native Americans
Authors: Susana Eyheramendy, Olga Klimenkova, Vladimir Shchur et al.
Year: 2021Source: bioRxiv (Cold Spring Harbor Laboratory)
Abstract The last few years have witnessed an explosive generation of genomic data from ancient and modern Native American populations. These data shed light on key demographic shifts that occurred in...
The Attention Economy and the Impact of Artificial Intelligence
Authors: Ricardo Baeza-Yates, Usama M. Fayyad
Year: 2021Source: Springer eBooks
The Personal Is the Political? What Do WhatsApp Users Share and How It Matters for News Knowledge, Polarization and Participation in Chile
Authors: Sebastián Valenzuela, Ingrid Bachmann, Matías Bargsted
Year: 2021Source: Digital Journalism
Mobile instant messaging services (MIMs) are important gateways to news exposure and political conversations. Nevertheless, we still know little about the specific uses and consequences of using messa...
Who is to Blame? Analysis of Government and News Media Frames During the 2014 Earthquake in Chile
Authors: Magdalena Saldaña
Year: 2021Source: Journalism Studies
This study relies on Entman's definition of frames and framing functions to analyze how the Chilean government and news media framed a natural disaster occurring in Chile in 2014. Using structural top...
A survey of RDF stores & SPARQL engines for querying knowledge graphs
Authors: Aidan Hogan, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo et al.
Year: 2021Source: The VLDB Journal
Screening of COVID-19 cases through a Bayesian network symptoms model and psychophysical olfactory test
Authors: Pablo Barceló, Marcelo Arenas, Susana Eyheramendy et al.
Year: 2021Source: iScience
An Extended Account of Trace-Relating Compiler Correctness and Secure Compilation
Authors: Eric Tanter, Carmine Abate, Roberto Blanco et al.
Year: 2021Source: ACM Transactions on Programming Languages and Systems
Compiler correctness, in its simplest form, is defined as the inclusion of the set of traces of the compiled program in the set of traces of the original program. This is equivalent to the preservatio...
Time- and Space-Efficient Regular Path Queries on Graphs
Authors: Aidan Hogan, Gonzalo Navarro, Diego Arroyuelo et al.
Year: 2021
Knowledge Graphs
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2021Source: Synthesis lectures on data, semantics and knowledge
This book provides a comprehensive and accessible introduction to knowledge graphs, which have recently garnered notable attention from both industry and academia. Knowledge graphs are founded on the
Subversive affordances as a form of digital transnational activism: The case of Telegram’s native proxy
Authors: Magdalena Saldaña, Marcelo Santos, Ksenia Tsyganova
Year: 2021Source: New Media & Society
Internet, social media, and app shutdowns have become frequent, not only in authoritarian states but also in emerging and fragile democracies. As Russian authorities enforced a legal blockage to Insta...
Alert Classification for the ALeRCE Broker System: The Real-time Stamp Classifier
Authors: Susana Eyheramendy, M. Catelan, A. Moya et al.
Year: 2021Source: The Astronomical Journal
Abstract We present a real-time stamp classifier of astronomical events for the Automatic Learning for the Rapid Classification of Events broker, ALeRCE. The classifier is based on a convolutional neu...
MillenniumDB: A Persistent, Open-Source, Graph Database
Authors: Cristian Riveros, Aidan Hogan, Carlos Buil-Aranda et al.
Year: 2021
SHREC 2021: Retrieval of Cultural Heritage Objects
Authors: Benjamín Bustos, Tobias Schreck, Stefan Lengauer et al.
Year: 2021Source: Computers & Graphics
Engineering Practical Lempel-Ziv Tries
Authors: Gonzalo Navarro, Diego Arroyuelo, Rajeev Raman et al.
Year: 2021Source: ACM Journal of Experimental Algorithmics
The Lempel-Ziv 78 ( LZ78 ) and Lempel-Ziv-Welch ( LZW ) text factorizations are popular, not only for bare compression but also for building compressed data structures on top of them. Their regular fa...
OpenCSMap: A System for Geolocating Computer Science Publications
Authors: Aidan Hogan, Felipe Manen
Year: 2021
#NFA Admits an FPRAS: Efficient Enumeration, Counting, and Uniform Generation for Logspace Classes
Authors: Cristian Riveros, Marcelo Arenas, Rajesh Jayaram et al.
Year: 2021Source: Journal of the ACM
In this work, we study two simple yet general complexity classes, based on logspace Turing machines, that provide a unifying framework for efficient query evaluation in areas such as information extra...
COVIDCube: An RDF Data Cube for Exploring Among-Country COVID-19 Correlations
Authors: Aidan Hogan, Tamara Novoa-Rodríguez
Year: 2021
Finding neighborhoods in Santiago, Chile: a graph neural network approach to urban cluster detection
Authors: Marcelo Mendoza, Hans Löbel, Naim Bro
Year: 2021
A Neural Networks Approach to SPARQL Query Performance Prediction
Authors: Daniel Arturo Casal Amat, Carlos Buil-Aranda, Carlos Valle-Vidal
Year: 2021
The SPARQL query language is the standard for querying RDF data and has been implemented in a wide variety of engines. These engines support hundreds of public endpoints on the Web which receive thous...
Fast Approximate Autocompletion for SPARQL Query Builders
Authors: Aidan Hogan, Gabriel de la Parra
Year: 2021
Matrix Query Languages
Authors: Cristian Riveros, Domagoj Vrgoč, Floris Geerts et al.
Year: 2021
Searching for Changing-state AGNs in Massive Data Sets. I. Applying Deep Learning and Anomaly-detection Techniques to Find AGNs with Anomalous Variability Behaviors
Authors: Susana Eyheramendy, A. Bayo, P. Sanchéz-Sáez et al.
Year: 2021Source: The Astronomical Journal
The classic classification scheme for Active Galactic Nuclei (AGNs) was recently challenged by the discovery of the so-called changing-state (changing-look) AGNs (CSAGNs). The physical mechanism behin...
Differences in citation patterns across areas, article types and age groups of researchers
Authors: Marcelo Mendoza
Year: 2021Source: Publications
The evaluation of research proposals and academic careers is subject to indicators of scientific productivity. Citations are critical signs of impact for researchers, and many indicators are based on ...
Second-Order Specifications and Quantifier Elimination for Consistent Query Answering in Databases
Authors: Leopoldo Bertossi
Year: 2021
Gradually Structured Data
Authors: Eric Tanter, Stefan Malewski, Michael Greenberg
Year: 2021Source: Proceedings of the ACM on Programming Languages
Dynamically-typed languages offer easy interaction with ad hoc data such as JSON and S-expressions; statically-typed languages offer powerful tools for working with structured data, notably algebraic ...
Correction: Characterization of Anorexia Nervosa on Social Media: Textual, Visual, Relational, Behavioral, and Demographical Analysis
Authors: Ana Freire, Roger Llobet Vives, Aida Álvarez et al.
Year: 2021Source: Journal of Medical Internet Research
[This corrects the article DOI: 10.2196/25925.].
Neoplasm topography and morphology corpus
Authors: Jocelyn Dunstan, Fabián Villena, Matías Rojas et al.
Year: 2021Source: Zenodo (CERN European Organization for Nuclear Research)
Pathology reports provide valuable information for cancer registries to understand, plan and implement strategies to mitigate the impact of cancer. However, coding key information from unstructured re...
Neoplasm topography and morphology corpus
Authors: Jocelyn Dunstan, Fabián Villena, Matías Rojas et al.
Year: 2021Source: Zenodo (CERN European Organization for Nuclear Research)
Pathology reports provide valuable information for cancer registries to understand, plan and implement strategies to mitigate the impact of cancer. However, coding key information from unstructured re...
Foundations of Symbolic Languages for Model Interpretability
Authors: Pablo Barceló, Jorge Pérez, Bernardo Subercaseaux et al.
Year: 2021
Adaptive Succinctness
Authors: Diego Arroyuelo, Rajeev Raman
Year: 2021Source: Lecture notes in computer science
Does regional anesthesia increase the risk of falling in elderly patients?
Authors: Aidan Hogan, Ursula Trinler, Laura C. Siegwart et al.
Year: 2021Source: Gait & Posture
Counter a Reactive Media System
Authors: Sebastián Valenzuela, Dhavan V. Shah, Jon Pevehouse et al.
Year: 2021Source: Routledge eBooks
US media and politics are defined by asymmetry and reactivity, with the Left operating by one set of rules and the Right by another. How should we respond to a right-wing media ecosystem increasingly ...
Agents of Representation: The Organic Connection between Society and Leftist Parties in Bolivia and Uruguay
Authors: Rafael Piñeiro Rodríguez, Fernando Rosenblatt, Verónica Pérez Betancur et al.
Year: 2021
DockerPedia: A Knowledge Graph of Software Images and Their Metadata
Authors: Maximiliano Osorio, Carlos Buil-Aranda, Idafen Santana-Perez et al.
Year: 2021Source: INTERNATIONAL JOURNAL OF SOFTWARE ENGINEERING AND KNOWLEDGE ENGINEERING
New insights from GWAS on longitudinal and cross-sectional BMI and related phenotypes in admixed children with Native American and European ancestries
Authors: Lucas Vicuña, Susana Eyheramendy, Tomás Norambuena et al.
Year: 2021Source: medRxiv (Cold Spring Harbor Laboratory)
Abstract Body-mass index (BMI) is a well-known marker of adiposity across all ages. The genetic architecture of BMI has been thoroughly studied among adults. In contrast, there are a few genome-wide a...
DACT-BERT: Differentiable Adaptive Computation Time for an Efficient BERT Inference
Authors: Felipe del Rio, Álvaro Soto, Vladimir Araujo et al.
Year: 2021
Fair Top-k Ranking with multiple protected groups
Authors: Ricardo Baeza-Yates, Meike Zehlike, Tom Suhr et al.
Year: 2021Source: Information Processing & Management
PUC Chile team at Caption Prediction: ResNet visual encoding and caption classification with Parametric ReLU
Authors: Denis Parra, Hans Löbel, Pablo Pino et al.
Year: 2021
Competing Frames and Melodrama: The Effects of Facebook Posts on Policy Preferences about COVID-19
Authors: Sebastián Valenzuela, Daniel Halpern, Ingrid Bachmann et al.
Year: 2021Source: Digital Journalism
The tension between health and economic considerations regarding COVID-19 has resulted in a framing contest, in which proponents and adversaries of strong containment measures hold oppositional frames...
Clinically Correct Report Generation from Chest X-Rays Using Templates
Authors: Denis Parra, Pablo Pino, Cecilia Besa et al.
Year: 2021Source: Lecture notes in computer science
PUC Chile team at TBT Task: Diagnosis of Tuberculosis Type using segmented CT scans
Authors: Pablo Messina, Denis Parra, Hans Löbel et al.
Year: 2021
PUC Chile team at VQA-Med 2021: Approaching VQA as a classification task via fine-tuning a pretrained CNN
Authors: Pablo Messina, Denis Parra, Hans Löbel et al.
Year: 2021
PUC Chile team at Concept Detection: K Nearest Neighbors with Perceptual Similarity
Authors: Denis Parra, Hans Löbel, Pablo Pino et al.
Year: 2021
Power-Law Distributed Graph Generation With MapReduce
Authors: Renzo Angles, Rodrigo Paredes, Fernanda López-Gallegos
Year: 2021
Effect of adding physical links on the robustness of the Internet modeled as a physical-logical interdependent network using simple strategies
Authors: Benjamín Bustos, Ivana Bachmann, Javier Bustos-Jimenez et al.
Year: 2021Source: International Journal of Critical Infrastructure Protection
COVID-19 in Chile: A Health Crisis amidst a Political Crisis amidst a Social Crisis
Authors: Sebastián Valenzuela, Ingrid Bachmann, Arturo Figueroa-Bustos
Year: 2021
Rethinking the Virtuous Circle Hypothesis on Social Media: Subjective versus Objective Knowledge and Political Participation
Authors: Sebastián Valenzuela, Sangwon Lee, Trevor Diehl
Year: 2021Source: Human Communication Research
Abstract Despite early promise, scholarship has shown little empirical evidence of learning from the news on social media. At the same time, scholars have documented the problem of information ‘snac...
Augmenting BERT-style Models with Predictive Coding to Improve Discourse-level Representations
Authors: Marcelo Mendoza, Álvaro Soto, Vladimir Araujo et al.
Year: 2021
Enhanced Word Embedding Variations for the Detection of Substance Abuse and Mental Health Issues on Social Media Writings
Authors: Ricardo Baeza-Yates, D Ramírez-Cifuentes, C Largeron et al.
Year: 2021
El proyecto Cybersyn: sus antecedentes técnicos
Authors: Claudio Gutiérrez
Year: 2021
The Complexity of Counting Problems Over Incomplete Databases
Authors: Pablo Barceló, Marcelo Arenas, Mikael Monet et al.
Year: 2021Source: ACM Transactions on Computational Logic
We study the complexity of various fundamental counting problems that arise in the context of incomplete databases, i.e., relational databases that can contain unknown values in the form of labeled nu...
Correction: Characterization of Anorexia Nervosa on Social Media: Textual, Visual, Relational, Behavioral, and Demographical Analysis (Preprint)
Authors: Ricardo Baeza-Yates, Nadia Sanz Lamora, Diego Alejandro Velazquez et al.
Year: 2021
COVID-19 in Chile
Authors: Sebastián Valenzuela, Ingrid Bachmann, Arturo Figueroa-Bustos
Year: 2021Source: Routledge eBooks
Once regarded as the poster child for democratic stability and sound policymaking in Latin America, in the last two decades Chile has experienced increasing levels of mistrust in political institution...
Computing the depth distribution of a set of boxes
Authors: Javiel Rojas-Ledesma, Pablo Pérez-Lantero, Jérémy Barbaya
Year: 2021
The shapley value of tuples in query answering
Authors: Leopoldo Bertossi, Benny Kimelfeld, Ester Livshits et al.
Year: 2021Source: Logical Methods in Computer Science
We investigate the application of the Shapley value to quantifying the contribution of a tuple to a query answer. The Shapley value is a widely known numerical measure in cooperative game theory and i...
Words, Tweets, and Reviews: Leveraging Affective Knowledge Between Multiple Domains
Authors: Felipe Bravo-Márquez, Cristián Tamblay
Year: 2021Source: Cognitive Computation
Predicting affinity ties in a surname network
Authors: Marcelo Mendoza, Naim Bro
Year: 2021Source: PLoS ONE
From administrative registers of last names in Santiago, Chile, we create a surname affinity network that encodes socioeconomic data. This network is a multi-relational graph with nodes representing s...
The future is big graphs: a community view on graph processing systems
Authors: Marcelo Arenas, Renzo Angles, Sakr Sherif et al.
Year: 2021Source: Communications of the ACM
Ensuring the success of big graph processing for the next decade and beyond.
Topic Models Ensembles for AD-HOC Information Retrieval
Authors: Marcelo Mendoza, Pablo Ormeño, Carlos Valle
Year: 2021Source: Information
Ad hoc information retrieval (ad hoc IR) is a challenging task consisting of ranking text documents for bag-of-words (BOW) queries. Classic approaches based on query and document text vectors use term...
A Simple and Fast Bi-Objective Search Algorithm
Authors: Jorge Baier, Sven Koenig, William Yeoh et al.
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
Many interesting search problems can be formulated as bi-objective search problems; for example, transportation problems where both travel distance and time need to be minimized. Multi-objective best-...
Fast and Almost Optimal Any-Angle Pathfinding Using the 2k Neighborhoods
Authors: Jorge Baier, Carlos Hernández, Nicolás Hormazábal et al.
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
Any-angle path finding on grids is an important problem with applications in autonomous robot navigation. In this paper, we show that a well-known pre-processing technique, namely subgoal graphs, orig...
A Neural Network for Decision Making in Real-Time Heuristic Search
Authors: Jorge Baier, Carlos Hernández, M. Natalia Castillo Fadic et al.
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
Most real-time heuristic search algorithms solve search problems by executing a series of episodes. During each episode the algorithm decides an action for execution. Such a decision is usually made u...
A Suboptimality Bound for 2k Grid Path Planning
Authors: Jorge Baier, Carlos Hernández, Nicolás Rivera et al.
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
The 2k neighborhood has been recently proposed as an alternative to optimal any-angle path planning over grids. Even though it has been observed empirically that the quality of solutions approaches th...
Time-Bounded Best-First Search
Authors: Jorge Baier, Carlos Hernández, Roberto Asín‐Achá
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
Time-Bounded A* (TBA*) is a single-agent deterministic search algorithm that expands states of a graph in the same order as A* does, but that unlike A* interleaves search and action execution. Althoug...
A Learning-Based Framework for Memory-Bounded Heuristic Search: First Results
Authors: Jorge Baier, Carlos Hernández, Sven Koenig et al.
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
Many existing boundedly-suboptimal heuristic search algorithms are variants of best-first search. Due to memory limitations, these algorithms are unable to solve problems with extremely large search s...
Toward a Search Strategy for Anytime Search in Linear Space Using Depth-First Branch and Bound
Authors: Jorge Baier, Carlos Hernández
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
Depth-First Branch and Bound (DFBnB) is an anytime algorithm for solving combinatorial optimization problems. In this paper we present a weighted version of DFBnB, wDFBnB, which incorporates standard ...
Compiling Cost-Optimal Multi-Agent Pathfinding to ASP
Authors: Jorge Baier, Carlos Hernández, Rodrigo Gómez
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
Multi-Agent Pathfinding (MAPF) over grids is the problem of finding n non-conflicting paths that lead n agents from a given initial cell to a given goal cell. Cost-optimal MAPF in addition minimizes t...
Abstracts of Papers Presented at SoCS 2016 in the Previously Published Paper Track
Authors: Jorge Baier, Adi Botea
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
This document gathers the abstracts for the papers that were presented as part of the Previously Published Paper Track.
Recursion in SPARQL
Authors: Juan Reutter, Domagoj Vrgoč, Adrián Soto
Year: 2021
Reasoning about Counterfactuals and Explanations: Problems, Results and Directions
Authors: Leopoldo Bertossi
Year: 2021
A Benchmark Dataset for Repetitive Pattern Recognition on Textured 3D Surfaces
Authors: Benjamín Bustos, Tobias Schreck, Stefan Lengauer et al.
Year: 2021Source: Computer Graphics Forum
Abstract In digital archaeology, a large research area is concerned with the computer‐aided analysis of 3D captured ancient pottery objects. A key aspect thereby is the analysis of motifs and patter...
A Protocol to Follow-up with Students in Large-enrollment Courses
Authors: Jorge Baier, Isabel Hilliger, Constanza Melian et al.
Year: 2021Source: 2020 ASEE Virtual Annual Conference Content Access Proceedings
Abstract In response to the covid-19 health crisis, many higher education institutions quickly moved to online education. As a result of that sudden switch, students faced unexpected difficulties, suc...
Position Paper: Incremental Search Algorithms Considered Poorly Understood
Authors: Jorge Baier, Carlos Hernández, Sven Koenig et al.
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
Incremental search algorithms, such as D* Lite, reuse information from previous searches to speed up the current search and can thus solve sequences of similar search problems faster than Repeated A*,...
Reconnecting with the Ideal Tree: An Alternative to Heuristic Learning in Real-Time Search
Authors: Jorge Baier, Carlos Hernández, Nicolás Rivera et al.
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
In this paper, we present a conceptually simple, easy-to-implement real-time search algorithm suitable for a priori partially known environments. Instead of performing a series of searches towards the...
Paper Summary: Time-Bounded Adaptive A*
Authors: Jorge Baier, Carlos Hernández, Sven Koenig et al.
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
This paper summarizes our AAMAS 2012 paper on "Time-Bounded Adaptive A*," which introduces the game time model to evaluate search algorithms in real-time settings, such as video games. It then extends...
Real-Time Adaptive A* with Depression Avoidance
Authors: Jorge Baier, Carlos Hernández
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
Real-time search is a well known approach to solving search problems under tight time constraints. Recently, it has been shown that LSS-LRTA∗ , a well-known real-time search algorithm, can be improv...
Automated detection and explainability of pathological gait patterns using a one-class support vector machine trained on inertial measurement unit based gait data
Authors: Aidan Hogan, Ursula Trinler, Wolfgang Teufl et al.
Year: 2021Source: Clinical Biomechanics
Machine learning approaches for the classification of pathological gait based on kinematic data, e.g. derived from inertial sensors, are commonly used in terms of a multi-class classification problem....
Differences in Citation Patterns across Areas, Article Types and Age Groups of Researchers
Authors: Marcelo Mendoza
Year: 2021
The evaluation of research proposals and academic careers is subject to indicators of scientific productivity. Citations are critical signs of impact for researchers, and many indicators are based on ...
A New Content-Based Image Retrieval System for SARS-CoV-2 Computer-Aided Diagnosis
Authors: Mauricio Araya, Marcelo Mendoza, Mauricio Solar et al.
Year: 2021Source: Lecture notes in electrical engineering
Content-Based Medical Image Retrieval and Intelligent Interactive Visual Browser for Medical Education, Research and Care
Authors: Mauricio Araya, Marcelo Mendoza, Mauricio Solar et al.
Year: 2021Source: Diagnostics
Medical imaging is essential nowadays throughout medical education, research, and care. Accordingly, international efforts have been made to set large-scale image repositories for these purposes. Yet,...
LSQ 2.0: A Linked Dataset of SPARQL Query Logs
Authors: Aidan Hogan, Carlos Buil-Aranda, Claus Stadler et al.
Year: 2021
Succinct Encoding of Binary Strings Representing Triangulations
Authors: Diego Seco, José Fuentes-Sepúlveda, Raquel Viaña
Year: 2021
Bounded-Suboptimal Search with Learned Heuristics
Authors: Jorge Baier
Year: 2021
Merging Web Tables for Relation Extraction with Knowledge Graphs
Authors: Aidan Hogan, Henry Rosales-Méndez, Jhomara Luzuriaga et al.
Year: 2021
Procesamiento de Lenguaje Natural: dónde estamos y qué estamos haciendo.
Authors: Felipe Bravo-Márquez
Year: 2021
Conectando la visión y el lenguaje
Authors: Jesús Pérez-Martín, Jorge Pérez, Benjamín Bustos
Year: 2021
Aprendizaje profundo en sistemas de recomendación
Authors: Denis Parra
Year: 2021
Aprendizaje de representaciones en grafos y su importancia en el análisis de redes
Authors: Marcelo Mendoza
Year: 2021
Correction to: Novel loci and mapuche genetic ancestry are associated with pubertal growth traits in Chilean boys
Authors: Susana Eyheramendy, Lucas Vicuña, Tomás Norambuena et al.
Year: 2021Source: Human Genetics
Social Media Is NOT that Bad! The Lexical Quality of Social Media
Authors: Ricardo Baeza-Yates, Luz Rello
Year: 2021Source: Proceedings of the International AAAI Conference on Web and Social Media
There is a strong correlation between spelling errors and web text content quality. Using our lexical quality measure, based in a small corpus of spelling errors, we present an estimation of the lexic...
How Bad Do You Spell?: The Lexical Quality of Social Media
Authors: Ricardo Baeza-Yates, Luz Rello
Year: 2021Source: Proceedings of the International AAAI Conference on Web and Social Media
In this study we present an analysis of the lexical quality of social media in the Web, focusing on the Web 2.0, social networks, blogs and micro-blogs, multimedia and opinions. We find that blogs and...
High Correlation between Incoming and Outgoing Activity: A Distinctive Property of Online Social Networks?
Authors: Ricardo Baeza-Yates, Diego Sáez-Trumper, David Nettleton
Year: 2021Source: Proceedings of the International AAAI Conference on Web and Social Media
User influence is an important topic of research for online social networks. Recent work has shown that a user's influence is not directly related with node in-degree. However, the definition of what ...
¿Puede una máquina ver mejor que un humano?
Authors: Aidan Hogan, Jorge Pérez
Year: 2021
Historia y evolución de la inteligencia artificial
Authors: Claudio Gutiérrez
Year: 2021
Premio Turing 2019: la revolución de la animación 3D por computadora
Authors: Benjamín Bustos
Year: 2021
Extending Sticky-Datalog+/-via Finite-Position Selection Functions: Tractability, Algorithms, and Optimization
Authors: Leopoldo Bertossi, Mostafa Milani
Year: 2021
Neural Abstractive Unsupervised Summarization of Online News Discussions
Authors: Marcelo Mendoza, Evangelos Milios, Ignacio Tampe
Year: 2021Source: Lecture notes in networks and systems
Creativity in Generative Musical Networks: Evidence From Two Case Studies
Authors: Denis Parra, Manuel Cartagena, Rodrigo Cádiz et al.
Year: 2021Source: Frontiers in Robotics and AI
Deep learning, one of the fastest-growing branches of artificial intelligence, has become one of the most relevant research and development areas of the last years, especially since 2012, when a neura...
Regularizing Conjunctive Features for Classification
Authors: Pablo Barceló, Alexander Baumgartner, Victor Dalmau et al.
Year: 2021Source: Journal of Computer and System Sciences
We consider the feature-generation task wherein we are given a database with entities labeled as positive and negative examples, and the goal is to find feature queries that allow for a linear separat...
Offering an Entrepreneurship Course to All Engineering Students: Lessons Learned from ING2030 in Puc-Chile
Authors: Jorge Baier, Isabel Hilliger, Constance Fleet et al.
Year: 2021
AHMoSe: A knowledge-based visual support system for selecting regression machine learning models
Authors: Denis Parra, Diego Rojo, Nyi Nyi Htun et al.
Year: 2021Source: Computers and Electronics in Agriculture
Space-efficient representations of raster time series
Authors: Diego Seco, José Paramá, Guillermo de Bernardo et al.
Year: 2021
Tools Impact on the Quality of Annotations for Chat Untangling
Authors: Felipe Bravo-Márquez, Jhonny Cerezo, Alexandre Henri Bergel et al.
Year: 2021
Jhonny Cerezo, Felipe Bravo-Marquez, Alexandre Henri Bergel. Proceedings of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natu...
Keynote: Ethics in AI – A Challenging Task
Authors: Ricardo Baeza-Yates
Year: 2021
Summary form only given. The complete presentation was not made available for publication as part of the conference proceedings. In the first part we cover five current specific challenges through exa...
Work in Progress: A Cross-sectional Survey Study for Understanding and Addressing the Needs of Engineering Students During COVID-19
Authors: Jorge Baier, Isabel Hilliger, Constanza Melian et al.
Year: 2021
Pumping Lemmas for Weighted Automata
Authors: Cristian Riveros, Filip Mazowiecki, Agnishom Chattopadhyay et al.
Year: 2021
A New Boolean Encoding for MAPF and its Performance with ASP and MaxSAT Solvers
Authors: Roberto Asin Acha, Rodrigo Lopez, Jorge Baier et al.
Year: 2021
Pumping lemmas for weighted automata
Authors: Cristian Riveros, Filip Mazowiecki, Anca Muscholl et al.
Year: 2021Source: Logical Methods in Computer Science
We present pumping lemmas for five classes of functions definable by fragments of weighted automata over the min-plus semiring, the max-plus semiring and the semiring of natural numbers. As a corollar...
Exploiting Learned Policies in Focal Search
Authors: Jorge Baier, Matias Greco, Pablo Araneda
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
Recent machine-learning approaches to deterministic search and domain-independent planning employ policy learning to speed up search. Unfortunately, when attempting to solve a search problem by succes...
A New Boolean Encoding for MAPF and its Performance with ASP and MaxSAT Solvers
Authors: Jorge Baier, Roberto Asín‐Achá, Rodrigo López et al.
Year: 2021Source: Proceedings of the International Symposium on Combinatorial Search
Multi-agent pathfinding (MAPF) is an NP-hard problem. As such, dense maps may be very hard to solve optimally. In such scenarios, compilation-based approaches, via Boolean satisfiability (SAT) and ans...
Answer-Set Programs for Reasoning about Counterfactual Interventions and Responsibility Scores for Classification
Authors: Leopoldo Bertossi, Gabriela Reyes, Gabriela de los Ángeles Díaz Reyes
Year: 2021Source: Inductive Logic Programming (ILP 2021)
Correction to: Supporting the classifcation of patients in public hospitals in Chile by designing, deploying and validating a system based on natural language processing
Authors: Jorge Pérez, Jocelyn Dunstan, René Lagos et al.
Year: 2021Source: BMC Medical Informatics and Decision Making
Characterization of Anorexia Nervosa on Social Media: Textual, Visual, Relational, Behavioral, and Demographical Analysis
Authors: Ricardo Baeza-Yates, Diana Ramírez-Cifuentes, Ana Freire et al.
Year: 2021Source: Journal of Medical Internet Research
Background Eating disorders are psychological conditions characterized by unhealthy eating habits. Anorexia nervosa (AN) is defined as the belief of being overweight despite being dangerously underwei...
Gradual Program Analysis for Null Pointers
Authors: Eric Tanter, Jenna Wise, Johannes Bader et al.
Year: 2021
Cabildo Abierto: oportunidades y desafíos para la construcción partidaria en un sistema de partidos institucionalizado
Authors: Fernando Rosenblatt, Lihuen Nocetto, Felipe Monestier
Year: 2021
Graphing else matters: exploiting aspect opinions and ratings in explainable graph-based recommendations
Authors: Denis Parra, Andrés Carvallo, Iván Cantador et al.
Year: 2021
Question Answering over Knowledge Graphs with Neural Machine Translation and Entity Linking
Authors: Aidan Hogan, Daniel Diomedi
Year: 2021
Time series classification for rumor detection
Authors: Marcelo Mendoza, Fernanda Weiss, E. Milios et al.
Year: 2021Source: IET conference proceedings.
The automatic detection of rumors in social networks has gained considerable attention from researchers and practitioners during the last decade, due to the consequences of the spread of disinformatio...
Fake News Detection via English-to-Spanish Translation: Is It Really Useful?
Authors: Marcelo Mendoza, Eliana Providel, Sebastián Ruíz
Year: 2021Source: Lecture notes in computer science
An index for moving objects with constant-time access to their compressed trajectories
Authors: Nieves Brisaboa, Travis Gagie, Gonzalo Navarro et al.
Year: 2021Source: International Journal of Geographical Information Science
As the number of vehicles and devices equipped with GPS technology has grown explosively, an urgent need has arisen for time- and space-efficient data structures to represent their trajectories. The m...
Temporal Regular Path Queries
Authors: Marcelo Arenas, Pedro Bahamondes
Year: 2021
Knowledge Graphs: A Guided Tour
Authors: Aidan Hogan, Claudio Gutiérrez, Eva Blomqvist et al.
Year: 2021Source: International Research School in Artificial Intelligence in Bergen (AIB 2022)
Tracking the historical events that lead to the interweaving of data and knowledge.
Diversity, Fairness, and Sustainability in Population Protocols
Authors: Nicolás Rivera, Nan Kang, Frederik Mallman-Trenn
Year: 2021
Construcción de recursos de texto para la identificación automática de información clínica en narrativas no estructuradas
Authors: Jocelyn Dunstan, Fabián Villena, Pablo Báez et al.
Year: 2021Source: Revista médica de Chile
A significant proportion of the clinical record is in free text format, making it difficult to extract key information and make secondary use of patient data. Automatic detection of information within...
A novel bivariate autoregressive model for predicting and forecasting irregularly observed time series
Authors: Susana Eyheramendy, Felipe Elorrieta, Wilfredo Palma et al.
Year: 2021Source: Monthly Notices of the Royal Astronomical Society
In several disciplines it is common to find time series measured at irregular observational times. In particular, in astronomy there are a large number of surveys that gather information over irregula...
Supporting the classification of patients in public hospitals in Chile by designing, deploying and validating a system based on natural language processing
Authors: Jorge Pérez, Fabián Villena, René Lagos et al.
Year: 2021Source: BMC Medical Informatics and Decision Making
Abstract Background In Chile, a patient needing a specialty consultation or surgery has to first be referred by a general practitioner, then placed on a waiting list. The Explicit Health Guarantees (G...
Worst-Case Optimal Graph Joins in Almost No Space
Authors: Aidan Hogan, Juan Reutter, Gonzalo Navarro et al.
Year: 2021Source: Proceedings of the 2022 International Conference on Management of Data
We present an indexing scheme that supports worst-case optimal (wco) joins over graphs within compact space. Supporting all possible wco joins using conventional data structures - based on B(+)-Trees,...
Visual-Syntactic Embedding for Video Captioning
Authors: Jorge Pérez, Benjamín Bustos, Jesús Pérez-Martín
Year: 2021
Visual-Syntactic Embedding for Video Captioning
Authors: Jorge Pérez, Benjamín Bustos, Jesus Perez-Martin
Year: 2021
Video captioning is the task of predicting a semantic and syntactically correct sequence of words given some context video. The most successful methods for video captioning have a strong dependency on...
Overcoming catastrophic forgetting using sparse coding and meta learning
Authors: Álvaro Soto, Julio Hurtado, Hans Löbel
Year: 2021
PePa Ping Dataset: Comprehensive Contextualization of Periodic Passive Ping in Wireless Networks
Authors: Benjamín Bustos, Javier Bustos-Jimenez, Diego Madariaga et al.
Year: 2021
Among all Internet Quality of Service (QoS) indicators, Round-trip time (RTT), jitter and packet loss have been thoroughly studied due to their great impact on the overall network's performance and th...
Delayed and Approved: A Quantitative Study of Conflicts and the Environmental Impact Assessments of Energy Projects in Chile 2012–2017
Authors: Sergio Toro, Juan Pablo Luna, Andrés Cruz et al.
Year: 2021Source: Sustainability
The Sistema de Evaluación de Impacto Ambiental (Environmental Impact Assessment System—SEIA) evaluates all projects potentially harmful to human health and the environment in Chile. Since its estab...
TNT: Text-Conditioned Network with Transductive Inference for Few-Shot Video Classification
Authors: Álvaro Soto, Juan Carlos Niebles, Vladimir Araujo et al.
Year: 2021
Expressive Power of Linear Algebra Query Languages
Authors: Cristian Riveros, Domagoj Vrgoč, Floris Geerts et al.
Year: 2021
Linear algebra algorithms often require some sort of iteration or recursion as is illustrated by standard algorithms for Gaussian elimination, matrix inversion, and transitive closure. A key character...
Score-Based Explanations in Data Management and Machine Learning: An Answer-Set Programming Approach to Counterfactual Analysis
Authors: Leopoldo Bertossi
Year: 2021Source: Reasoning Web. Declarative Artificial Intelligence. Reasoning Web 2021
Query Games in Databases
Authors: Leopoldo Bertossi, Benny Kimelfeld, Ester Livshits et al.
Year: 2021Source: ACM SIGMOD Record
Database tuples can be seen as players in the game of jointly realizing the answer to a query. Some tuples may contribute more than others to the outcome, which can be a binary value in the case of a ...
Notas para el debate constitucional: breve análisis comparado sobre tres dimensiones institucionales en disputa
Authors: Sergio Toro
Year: 2021
Much Ado About Facebook? Evidence from 80 Congressional Campaigns in Chile
Authors: Bárbara Poblete, Sergio Toro, Fernando Rosenblatt et al.
Year: 2021Source: Journal of Information Technology & Politics
How do political candidates combine social media campaign tools with on-the-ground political campaigns to pursue segmented electoral strategies? We argue that online campaigns can reproduce and reinfo...
Supplementary Material for the paper: COVID-19 document type screening with neural language models for evidence-based healthcare
Authors: Denis Parra, Andrés Carvallo, Gabriel Rada
Year: 2021Source: Zenodo (CERN European Organization for Nuclear Research)
Supplementary Material: COVID-19 document type screening
Authors: Denis Parra, Andrés Carvallo, Gabriel Rada
Year: 2021Source: Zenodo (CERN European Organization for Nuclear Research)
Supplementary Material: COVID-19 document type screening
Authors: Denis Parra, Andrés Carvallo, Gabriel Rada
Year: 2021Source: Zenodo (CERN European Organization for Nuclear Research)
A Comparative Dataset: Bridging COVID-19 and Other Diseases through Epistemonikos and CORD-19 Evidence
Authors: Denis Parra, Hans Löbel, Andrés Carvallo et al.
Year: 2021Source: Zenodo (CERN European Organization for Nuclear Research)
A Comparative Dataset: Bridging COVID-19 and Other Diseases through Epistemonikos and CORD-19 Evidence
Authors: Denis Parra, Hans Löbel, Andrés Carvallo et al.
Year: 2021Source: Zenodo (CERN European Organization for Nuclear Research)
A polynomial-time approximation algorithm for counting words accepted by an NFA (invited paper)
Authors: Cristian Riveros, Marcelo Arenas, Rajesh Jayaram et al.
Year: 2021
Counting the number of words of a certain length accepted by a non-deterministic finite automaton (NFA) is a fundamental problem, which has many applications in different areas such as graph databases...
When is approximate counting for conjunctive queries tractable?
Authors: Cristian Riveros, Marcelo Arenas, Rajesh Jayaram et al.
Year: 2021
Conjunctive queries are one of the most common class of queries used in database systems, and the best studied in the literature. A seminal result of Grohe, Schwentick, and Segoufin (STOC 2001) demons...
Evaluating Interactive Comparison Techniques in a Multiclass Density Map for Visual Crime Analytics
Authors: Denis Parra, Lukas Svicarovic, María Jesús Lobo
Year: 2021
Graph Neural Networks with Local Graph Parameters
Authors: Pablo Barceló, Juan Reutter, Floris Geerts et al.
Year: 2021
Stress Test Evaluation of Biomedical Word Embeddings
Authors: Denis Parra, Vladimir Araujo, Carlos Aspillaga et al.
Year: 2021
The success of pretrained word embeddings has motivated their use in the biomedical domain, with contextualized embeddings yielding remarkable results in several biomedical NLP tasks. However, there i...
Castigo a los oficialismos y ciclo político de derecha en América Latina
Authors: Juan Pablo Luna, Cristóbal Rovira Kaltwasser
Year: 2021Source: Revista Uruguaya de Ciencia Política
This article presents a characterization of three type of strategies (non-electoral, non-partisan electoral, and partisan) pursued by the right in contemporary Latin America. By analyzing the recent c...
Querying in the Age of Groph Databases and Knowledge Graphs
Authors: Marcelo Arenas, Claudio Gutiérrez
Year: 2021Source: Proceedings of the 2022 International Conference on Management of Data
Graphs have become the best way we know of representing knowledge. The computing community has investigated and developed the support for managing graphs by means of digital technology. Graph database...
PG-Keys: Keys for Property Graphs
Authors: Bei Li, Wim Martens, Filip Murlak et al.
Year: 2021Source: Proceedings of the 2022 International Conference on Management of Data
We report on a community effort between industry and academia to shape the future of property graph constraints. The standardization for a property graph query language is currently underway through t...
Optimizing Reusable Knowledge for Continual Learning via Metalearning
Authors: Álvaro Soto, Julio Hurtado, Alain Raymond-Saez
Year: 2021
A Downward Spiral? A Panel Study of Misinformation and Media Trust in Chile
Authors: Sebastián Valenzuela, Daniel Halpern, Felipe Araneda
Year: 2021Source: The International Journal of Press/Politics
Despite widespread concern, research on the consequences of misinformation on people's attitudes is surprisingly scant. To fill in this gap, the current study examines the long-term relationship betwe...
High Dose Ascorbic Acid During Acute Resuscitation in Critically Burn Patients
Authors: Claudio Gutiérrez, Eva Flores, Manuel Sánchez-Sánchez et al.
Year: 2021Source: Journal of Burn Care & Research
Ascorbic acid (AA) is a potent oxygen-free radical scavenger. We hypothesized that treating severe burn patients with high doses of AA (HDAA) can reduce fluid resuscitation requirements and prevent or...
Inspecting the concept knowledge graph encoded by modern language models
Authors: Marcelo Mendoza, Álvaro Soto, Carlos Aspillaga
Year: 2021
Domestic Isomorphic Pressures in the Design of FOI Oversight Institutions in Latin America
Authors: Rafael Piñeiro Rodríguez, Fernando Rosenblatt, Paula Muñoz et al.
Year: 2021
Guarded Ontology-Mediated Queries
Authors: Pablo Barceló, Gerald Berger, Andreas Pieris et al.
Year: 2021Source: Outstanding contributions to logic
Novel loci and Mapuche genetic ancestry are associated with pubertal growth traits in Chilean boys
Authors: Lucas Vicuña, Susana Eyheramendy, Tomás Norambuena et al.
Year: 2021Source: Human Genetics
Puberty is a complex developmental process that varies considerably among individuals and populations. Genetic factors explain a large proportion of the variability of several pubertal traits. Recent ...
A data-driven strategy to combine word embeddings in information retrieval
Authors: Marcelo Mendoza, Alfredo Silva
Year: 2021
Building a Party with Activists: The Case of the Uruguayan FA
Authors: Rafael Piñeiro Rodríguez, Fernando Rosenblatt, Verónica Pérez Betancur
Year: 2021
The Tractability of SHAP-Score-Based Explanations for Classification over Deterministic and Decomposable Boolean Circuits
Authors: Leopoldo Bertossi, Marcelo Arenas, Mikaël Monet et al.
Year: 2021Source: Proceedings of the AAAI Conference on Artificial Intelligence
Scores based on Shapley values are widely used for providing explanations to classification results over machine learning models. A prime example of this is the influential SHAP-score, a version of th...
An irregularly spaced first-order moving average model
Authors: Susana Eyheramendy, C. Ojeda, W. Palma et al.
Year: 2021
Gendered bureaucracies: Women mayors and the size and composition of local governments
Authors: Carla Alberti, Diego Díaz-Rioseco, Giancarlo Visconti et al.
Year: 2021Source: Governance
Abstract While women are underrepresented in politics, recent improvements in women's representation in legislative and executive bodies have spurred academic interest in the effects of electing women...
Compact Representation of Spatial Hierarchies and Topological Relationships
Authors: María Andrea Rodríguez, Diego Seco, Gonzalo Navarro et al.
Year: 2021
A galaxy of apps: Mobile app reliance and the indirect influence on political participation through political discussion and trust
Authors: Magdalena Saldaña, Barb Kaye, Thomas J. Johnson et al.
Year: 2021Source: Mobile Media & Communication
The power of app-driven mobile phones was first unleashed in 2011 when they were used to mobilize protesters and gain support for political movements in the United States and abroad. Mobile devices ha...
GES classification dataset
Authors: Jocelyn Dunstan, Fabián Villena
Year: 2021Source: Zenodo (CERN European Organization for Nuclear Research)
Background In Chile, a patient needing a specialty consultation or surgery has to first be referred by a general practitioner, then placed on a waiting list. The Explicit Health Guarantees (GES in Spa...
GES classification dataset
Authors: Jocelyn Dunstan, Fabián Villena
Year: 2021Source: Zenodo (CERN European Organization for Nuclear Research)
Background In Chile, a patient needing a specialty consultation or surgery has to first be referred by a general practitioner, then placed on a waiting list. The Explicit Health Guarantees (GES in Spa...
Old Adults Are More Engaged on Facebook, Especially in Politics: Evidence From Users in 46 Countries
Authors: Sergio Toro, Juan Pablo Luna, Gabriel Vommaro et al.
Year: 2021Source: SSRN Electronic Journal
Evidence is emerging that old adults share more disinformation online and are more politically polarized. Based on the Facebook Privacy-Protected Full URLs Data Set, a vast Facebook database with demo...
Principles of Databases (Preliminary Version)
Authors: Pablo Barceló, Marcelo Arenas, Andreas Pieris et al.
Year: 2021
State-space Representation of Matérn and Damped Simple Harmonic Oscillator Gaussian Processes
Authors: Susana Eyheramendy, Andrés Jordán, Johanes Buchner et al.
Year: 2021Source: Research Notes of the AAS
Abstract Gaussian processes (GPs) are used widely in the analysis of astronomical time series. GPs with rational spectral densities have state-space representations which allow <?CDATA ${ \mathcal O }...
Correction to: Towards intellectual freedom in an AI Ethics Global Community
Authors: Ricardo Baeza-Yates, Hengjin Cai, Jeanna Matthews et al.
Year: 2021Source: AI and Ethics
Cross-lingual hate speech detection based on multilingual domain-specific word embeddings
Authors: Jorge Pérez, Bárbara Poblete, Aymé Arango
Year: 2021
Recordar el futuro, la frontera de las tecnologías de búsqueda
Authors: Ricardo Baeza-Yates
Year: 2021
The incidence of psoriasis in Chile: an analysis of the National Waiting List Repository
Authors: Jocelyn Dunstan, Fabián Villena, Steffen Härtel et al.
Year: 2021Source: Clinical and Experimental Dermatology
Psoriasis is a serious and chronic noncommunicable disease. However, the fundamental measure of disease occurrence, the incidence, has been scarcely reported globally. There are no previous studies of...
Data Science for Engineers: A Teaching Ecosystem
Authors: Felipe Bravo-Márquez, Jocelyn Dunstan, Felipe Tobar et al.
Year: 2021
Data Science for Engineers: A Teaching Ecosystem
Authors: Felipe Bravo-Márquez, Jocelyn Dunstan, Felipe Tobar et al.
Year: 2021Source: IEEE Signal Processing Magazine
We describe an ecosystem for teaching data science (DS) to engineers that blends theory, methods, and applications, developed at the Faculty of Physical and Mathematical Sciences (FCFM is its Spanish ...
Table of Contents
Authors: Felipe Bravo-Márquez, Jocelyn Dunstan, Felipe Tobar et al.
Year: 2021Source: IEEE Signal Processing Magazine
Faster repetition-aware compressed suffix trees based on Block Trees
Authors: Gonzalo Navarro, Manuel Cáceres
Year: 2021Source: Information and Computation
The suffix tree is a fundamental data structure in stringology, but its space usage, though linear, is an important problem in applications like Bioinformatics. We design and implement a new compresse...
Ensuring Data Readiness for Quality Requirements with Help from Procedure Reuse
Authors: Juan Reutter, Jon Doyle, Rada Chirkova
Year: 2021Source: Journal of Data and Information Quality
Assessing and improving the quality of data are fundamental challenges in Big-Data applications. These challenges have given rise to numerous solutions targeting transformation, integration, and clean...
The Automatic Learning for the Rapid Classification of Events (ALeRCE) Alert Broker
Authors: Susana Eyheramendy, Andrés Jordán, M. Catelan et al.
Year: 2021Source: The Astronomical Journal
We introduce the Automatic Learning for the Rapid Classification of Events (ALeRCE) broker, an astronomical alert broker designed to provide a rapid and self--consistent classification of large etendu...
A trend study in the stratification of social media use among urban youth: Chile 2009-2019
Authors: Sebastián Valenzuela, Teresa Correa
Year: 2021Source: Journal of Quantitative Description Digital Media
This trend study describes changes and continuities in the stratification of usage of Facebook, Twitter, Instagram, and WhatsApp in Chile between 2009-2019—the decade that witnessed the rise of soci...
Accompanying development for the paper: Dijkstra monads for all
Authors: Eric Tanter, Kenji Maillard, Cătălin Hriţcu et al.
Year: 2021Source: Artifact Digital Object Group
Assessing the Risk of Democratic Reversal in the United States: A Reply to Kurt Weyland
Authors: Juan Pablo Luna, Matías López
Year: 2021
Assessing the Risk of Democratic Reversal in the United States: A Reply to Kurt Weyland
Authors: Juan Pablo Luna, Matias López
Year: 2021Source: PS Political Science & Politics
ABSTRACT By replying to Kurt Weyland’s (2020) comparative study of populism, we revisit optimistic perspectives on the health of American democracy in light of existing evidence. Relying on a set-th...
Exploiting Learned Policies in Focal Search
Authors: Jorge Baier, Matias Greco, Pablo Araneda
Year: 2021
Forecasting copper electrorefining cathode rejection by means of recurrent neural networks with attention mechanism
Authors: Hans Löbel, Pedro Pablo Correa, Aldo Cipriano et al.
Year: 2021
Interventions Recommendation: Professionals’ Observations Analysis in Special Needs Education
Authors: Felipe Bravo-Márquez, Javier Muñoz
Year: 2021
VisRec: A Hands-on Tutorial on Deep Learning for Visual Recommender Systems
Authors: Felipe del Rio, Denis Parra, Manuel Cartagena et al.
Year: 2021
This tutorial serves as an introduction to deep learning approaches to build visual recommendation systems. Deep learning models can be used as feature extractors, and perform extremely well in visual...
Fourth Workshop on Exploratory Search and Interactive Data Analytics (ESIDA)
Authors: Denis Parra, Dorota Glowacka, Evangelos Milios et al.
Year: 2021
This is the fourth edition of the Workshop on Exploratory Search and Interactive Data Analytics (ESIDA). This series of workshops emerged as a response to the growing interest in developing new method...
Towards intellectual freedom in an AI Ethics Global Community
Authors: Ricardo Baeza-Yates, Christoph Ebell, Richard Benjamins et al.
Year: 2021Source: AI and Ethics
Evaluating a Learning Analytics Dashboard to Visualize Student Self-Reports of Time-on-task: A Case Study in a Latin American University
Authors: Isabel Hilliger, Denis Parra, Gregory Schuit et al.
Year: 2021
In recent years, instructional design has become even more challenging for teaching staff members in higher education institutions. If instructional design causes student overload, it could lead to su...
Misleading information in Spanish: a survey
Authors: Marcelo Mendoza, Eliana Providel
Year: 2021Source: Social Network Analysis and Mining
Survey of RDF Stores & SPARQL Engines for Querying Knowledge Graphs
Authors: Aidan Hogan, Bin Yao, Waqas Ali et al.
Year: 2021
Survey of RDF Stores & SPARQL Engines for Querying Knowledge Graphs
Authors: Aidan Hogan, Bin Yao, Waqas Ali et al.
Year: 2021
Recent years have seen the growing adoption of non-relational data models for representing diverse, incomplete data. Among these, the RDF graph-based data model has seen ever-broadening adoption, part...
A Survey of RDF Stores & SPARQL Engines for Querying Knowledge Graphs
Authors: Aidan Hogan, Waqas Ali, Muhammad Saleem et al.
Year: 2021
Recent years have seen the growing adoption of non-relational data models for representing diverse, incomplete data. Among these, the RDF graph-based data model has seen ever-broadening adoption, part...
Measuring heterogeneous perception of urban space with massive data and machine learning: An application to safety
Authors: Hans Löbel, Tomás Rossetti, Ricardo Hurtubia et al.
Year: 2021Source: Landscape and Urban Planning
On the Complexity of SHAP-Score-Based Explanations: Tractability via Knowledge Compilation and Non-Approximability Results
Authors: Pablo Barceló, Leopoldo Bertossi, Marcelo Arenas
Year: 2021
Using pre-analysis plans in qualitative research
Authors: Rafael Piñeiro Rodríguez, Fernando Rosenblatt, Verónica Pérez Betancur
Year: 2021
Investigative journalism in Latin America today
Authors: Magdalena Saldaña, Silvio Waisbord
Year: 2021
Bridging Vision and Language from the Video-to-Text Perspective: A Comprehensive Review
Authors: Jorge Pérez, Benjamín Bustos, Ivan Sipiran et al.
Year: 2021
Anonymity and Asynchronicity as Key Design Dimensions for the Reciprocity of Online Democratic Deliberation
Authors: Claudio Gutiérrez, Leandro De Brasi
Year: 2021Source: International Journal of Applied Philosophy
The aim of this paper is to identify, given certain democratic normative standards regarding deliberation, some pros as well as cons of possible online deliberation designs due to variations in two ke...
“Fake News Is Anything They Say!” — Conceptualization and Weaponization of Fake News among the American Public
Authors: Sebastián Valenzuela, Jianing Li, Chau Tong et al.
Year: 2021Source: Routledge eBooks
This study examines the articulation of public opinion about so-called fake news using a national survey (N = 510) of U.S. adults conducted in 2018. We coded respondents' open-ended answers about what...
Crisis communication: a comparative study of communication patterns across crisis events in social media
Authors: Bárbara Poblete, Hernán Sarmiento
Year: 2021
Valuable and timely information about crisis situations such as natural disasters, can be rapidly obtained from user-generated content in social media. This has created an emergent research field that...
Mind The Gap! The Role of Political Identity and Attitudes in the Emergence of Belief Gaps
Authors: Magdalena Saldaña, Shannon McGregor, Tom Johnson et al.
Year: 2021Source: International Journal of Public Opinion Research
Abstract To more fully understand the belief gap hypothesis, this study examines the effect of political identity, education, and partisan media consumption on the formation of attitudes and false bel...
Range Majorities and Minorities in Arrays
Authors: Travis Gagie, Gonzalo Navarro, Djamal Belazzougui et al.
Year: 2021Source: Algorithmica
Raising the Red Flag: Democratic Elitism and the Protests in Chile
Authors: Fernando Rosenblatt, Matthew Rhodes-Purdy
Year: 2021
Ranked Enumeration of MSO Logic on Words
Authors: Alejandro Grez, Cristian Riveros, Pierre Bourhis et al.
Year: 2021
Explainability Queries for ML Models and its Connections with Data Management Problems
Authors: Pablo Barceló
Year: 2021
Indexing highly repetitive string collections, part I: Repetitiveness measures
Authors: Gonzalo Navarro
Year: 2021Source: ACM Computing Surveys
Two decades ago, a breakthrough in indexing string collections made it possible to represent them within their compressed space while at the same time offering indexed search functionalities. As this ...
Attention is Turing Complete
Authors: Pablo Barceló, Jorge Pérez, Javier Marinkovic
Year: 2021
Compact Representation of Spatial Hierarchies and Topological Relationships
Authors: Gonzalo Navarro, José Fuentes‐Sepúlveda, Diego Seco et al.
Year: 2021
The topological model for spatial objects identifies common boundaries between regions, explicitly storing adjacency relations, which not only improves the efficiency of topologyrelated queries, but a...
A Disk-Based Index for Trajectories with an In-Memory Compressed Cache
Authors: Gonzalo Navarro, Adrian Gomoz-Brandon, D.T.S. Campos
Year: 2021
We present a representation of trajectories moving through the space without any constraint. It combines an in-memory cached index based on compact data structures and a classic disk-based strategy. T...
The Capocelli Prize
Authors: Gonzalo Navarro, Travis Gagie, Nieves R. Brisaboa et al.
Year: 2021
A Disk-Based Index for Trajectories with an In-Memory Compressed Cache
Authors: Gonzalo Navarro, Adrián Gómez-Brandón, Daniela Campos Fischer
Year: 2021
PHONI: Streamed Matching Statistics with Multi-Genome References
Authors: Gonzalo Navarro, Travis Gagie, Dominik Köppl et al.
Year: 2021
Computing the matching statistics of patterns with respect to a text is a fundamental task in bioinformatics, but a formidable one when the text is a highly compressed genomic database. Bannai et al. ...
A grammar compressor for collections of reads with applications to the construction of the BWT
Authors: Gonzalo Navarro, Diego Díaz-Domínguez
Year: 2021
We describe a grammar for DNA sequencing reads from which we can compute the BWT directly. Our motivation is to perform in succinct space genomic analyses that require complex string queries not yet s...
Alert Classification for the ALeRCE Broker System: The Light Curve Classifier
Authors: Susana Eyheramendy, M. Catelan, J. Borissova et al.
Year: 2021Source: The Astronomical Journal
Abstract We present the first version of the Automatic Learning for the Rapid Classification of Events (ALeRCE) broker light curve classifier. ALeRCE is currently processing the Zwicky Transient Facil...
The Tractability of SHAP-Score-Based Explanations over Deterministic and Decomposable Boolean Circuits
Authors: Pablo Barceló, Leopoldo Bertossi, Marcelo Arenas
Year: 2021
What “Emergency Sources” Expect From Journalists: Applying the Hierarchy of Influences Model to Disaster News Coverage
Authors: Sebastián Valenzuela, Daniela Grassau, Soledad Puente
Year: 2021
"Bolivia’s Old and New Illnesses" in Divisive politics and democratic dangers in Latin America
Authors: Carla Alberti
Year: 2021
Investigative journalism in Latin America today
Authors: Magdalena Saldaña, Silvio Waisbord
Year: 2021Source: Routledge eBooks
This chapter examines the state of investigative journalism in Latin America. It focuses on four major trends: the rise of collaborative forms of regional and global reporting, the consolidation of vi...
Indexing highly repetitive string collections, part II: Compressed indexes
Authors: Gonzalo Navarro
Year: 2021Source: ACM Computing Surveys
Two decades ago, a breakthrough in indexing string collections made it possible to represent them within their compressed space while at the same time offering indexed search functionalities. As this ...
AI & Human Values: Inequalities, Biases, Fairness, Nudge, and Feedback Loops
Authors: Ricardo Baeza-Yates, Laurence Devillers, Françoise Fogelman-Soulié et al.
Year: 2021Source: Lecture notes in computer science
Improving Signal-Strength Aggregation for Mobile Crowdsourcing Scenarios
Authors: Benjamín Bustos, Javier Bustos-Jimenez, Diego Madariaga et al.
Year: 2021Source: Sensors
Due to its huge impact on the overall quality of service (QoS) of wireless networks, both academic and industrial research have actively focused on analyzing the received signal strength in areas of p...
Innovación social en ciudades portuarias de Chile. De la logística a la articulación territorial en la Región del Biobío
Authors: Sergio Toro, Mabel Alarcón, Alejandro Tudela et al.
Year: 2021
On the Approximation Ratio of Ordered Parsings
Authors: Gonzalo Navarro, Nicola Prezza, Carlos Ochoa
Year: 2021
PolyLM: Learning about Polysemy through Language Modeling
Authors: Felipe Bravo-Márquez, Bernhard Pfahringer, Alan Ansell
Year: 2021
To avoid the “meaning conflation deficiency” of word embeddings, a number of models have aimed to embed individual word senses. These methods at one time performed well on tasks such as word sense...
A Data-Driven Strategy to Combine Word Embeddings in Information Retrieval
Authors: Marcelo Mendoza, Alfredo Silva
Year: 2021
Word embeddings are vital descriptors of words in unigram representations of documents for many tasks in natural language processing and information retrieval. The representation of queries has been o...
A Compact Answer Set Programming Encoding of Multi-Agent Pathfinding
Authors: Jorge Baier, Carlos Hernández, Rodrigo Gómez
Year: 2021
Incremental Word Vectors for Time-Evolving Sentiment Lexicon Induction
Authors: Felipe Bravo-Márquez, Bernhard Pfahringer, Arun Khanchandani
Year: 2021Source: Cognitive Computation
Improved screening of COVID-19 cases through a Bayesian network symptoms model and psychophysical olfactory test
Authors: Pablo Barceló, Marcelo Arenas, Martín Ugarte et al.
Year: 2021Source: medRxiv (Cold Spring Harbor Laboratory)
Abstract The infectiousness and presymptomatic transmission of SARS-CoV-2 hinder pandemic control efforts worldwide. Therefore, the frequency of testing, accessibility, and immediate results are criti...
COVID-19 dataset for training and validation of Bayes network model
Authors: Pablo Barceló, Marcelo Arenas, Susana Eyheramendy et al.
Year: 2021
The Marriage of Univalence and Parametricity
Authors: Eric Tanter, Nicolas Tabareau, Matthieu Sozeau
Year: 2021Source: Journal of the ACM
Reasoning modulo equivalences is natural for everyone, including mathematicians. Unfortunately, in proof assistants based on type theory, which are frequently used to mechanize mathematical results an...
Detecting Anomalies at a TLD Name Server Based on DNS Traffic Predictions
Authors: Benjamín Bustos, Javier Bustos-Jiménez, Diego Madariaga et al.
Year: 2021Source: IEEE Transactions on Network and Service Management
The Domain Name System (DNS) is a critical component of Internet infrastructure, as almost every activity on the Internet starts with a DNS query. Given its importance, there is increasing concern ove...
Compact structure for sparse undirected graphs based on a clique graph partition
Authors: Gonzalo Navarro, Felipe Glaria, Cecilia Hernandez et al.
Year: 2021Source: Information Sciences
Detecting Anomalies at a TLD Name Server Based on DNS Traffic Predictions
Authors: Benjamín Bustos, Javier Bustos-Jimenez, Diego Madariaga et al.
Year: 2021
Attentive visual semantic specialized network for video captioning
Authors: Jorge Pérez, Benjamín Bustos, Jesús Pérez-Martín
Year: 2021
Attentive Visual Semantic Specialized Network for Video Captioning
Authors: Jorge Pérez, Benjamín Bustos, Jesus Perez-Martin
Year: 2021Source: 2022 26th International Conference on Pattern Recognition (ICPR)
As an essential high-level task of video understanding topic, automatically describing a video with natural language has recently gained attention as a fundamental challenge in computer vision. Previo...
Improving video captioning with temporal composition of a visual-syntactic embedding
Authors: Jorge Pérez, Benjamín Bustos, Jesús Pérez-Martín
Year: 2021
Surname affinity in Santiago, Chile: A network-based approach that uncovers urban segregation.
Authors: Marcelo Mendoza, Naim Bro
Year: 2021Source: PLoS ONE
Based on a geocoded registry of more than four million residents of Santiago, Chile, we build two surname-based networks that reveal the city's population structure. The first network is formed from p...
Towards a Definitive Measure of Repetitiveness
Authors: Gonzalo Navarro
Year: 2021
Chillin’ Effects of Fake News: Changes in Practices Related to Accountability and Transparency in American Newsrooms Under the Influence of Misinformation and Accusations Against the News Media
Authors: Magdalena Saldaña, Hong Tien Vu
Year: 2021Source: Journalism & Mass Communication Quarterly
This study examines how newsroom work in the United States has changed in response to some of the latest developments in the news media environment. Using nationally representative survey data, we exp...
Mathematical Model for Estimating Nutritional Status of the Population with Poor Data Quality in Developing Countries: The Case of Chile
Authors: Jocelyn Dunstan, Cristóbal Cuadrado, Luis Rojo-González et al.
Year: 2021
A Fast and Small Subsampled R-index
Authors: Gonzalo Navarro, Travis Gagie, Dustin Cobas
Year: 2021Source: arXiv (Cornell University)
The $r$-index (Gagie et al., JACM 2020) represented a breakthrough in compressed indexing of repetitive text collections, outperforming its alternatives by orders of magnitude. Its space usage, $\math...
HOLZ: High-Order Entropy Encoding of Lempel-Ziv Factor Distances
Authors: Gonzalo Navarro, Dominik Köppl, Nicola Prezza
Year: 2021Source: arXiv (Cornell University)
We propose a new representation of the offsets of the Lempel-Ziv (LZ) factorization based on the co-lexicographic order of the processed prefixes. The selected offsets tend to approach the k-th order ...
On Stricter Reachable Repetitiveness Measures*
Authors: Gonzalo Navarro, C. Urbina
Year: 2021Source: arXiv (Cornell University)
The size $b$ of the smallest bidirectional macro scheme, which is arguably the most general copy-paste scheme to generate a given sequence, is considered to be the strictest reachable measure of repet...
Overcoming Catastrophic Forgetting Using Sparse Coding and Meta Learning
Authors: Hans Löbel, Álvaro Soto, Julio Hurtado
Year: 2021Source: IEEE Access
Continuous learning occurs naturally in human beings. However, Deep Learning methods suffer from a problem known as Catastrophic Forgetting (CF) that consists of a model drastically decreasing its per...
Forecasting Copper Electrorefining Cathode Rejection by Means of Recurrent Neural Networks With Attention Mechanism
Authors: Hans Löbel, Pedro Correa, Juan Carlos Salas et al.
Year: 2021Source: IEEE Access
Electrolytic refining is the last step of pyrometallurgical copper production. Here, smelted copper is converted into high-quality cathodes through electrolysis. Cathodes that do not meet the physical...
Automatic Support System for Tumor Coding in Pathology Reports in Spanish
Authors: Jocelyn Dunstan, Fabián Villena, Pablo Báez et al.
Year: 2021Source: SSRN Electronic Journal
Pathology reports provide valuable information for cancer registries to understand, plan and implement strategies to mitigate the impact of cancer. However, coding key information from unstructured re...
Mathematical Model for Estimating Nutritional Status of the Population with Poor Data Quality in Developing Countries: The Case of Chile
Authors: Jocelyn Dunstan, Cristóbal Cuadrado, Luis Rojo-González et al.
Year: 2021
Queries used to illustrate the DockerPedia KG
Authors: Carlos Buil-Aranda, Daniel Garijo, Maximiliano Osorio et al.
Year: 2021Source: Figshare
Query results obtained when issuing the SPARQL queries in the listings of the paper to the SPARQL endpoint in https://dockerpedia.inf.utfsm.cl/<br>
Querying in the Age of Graph Databases and Knowledge Graphs
Authors: Marcelo Arenas, Claudio Gutiérrez, Juan Sequeda
Year: 2021Source: arXiv (Cornell University)
Graphs have become the best way we know of representing knowledge. The computing community has investigated and developed the support for managing graphs by means of digital technology. Graph database...
CORE: a Complex Event Recognition Engine
Authors: Cristian Riveros, Stijn Vansummeren, Alejandro Grez et al.
Year: 2021Source: arXiv (Cornell University)
Complex Event Recognition (CER) systems are a prominent technology for finding user-defined query patterns over large data streams in real time. CER query evaluation is known to be computationally cha...
How do centrality measures choose the root of trees?
Authors: Cristian Riveros, Jorge Salas, Oskar Skibski
Year: 2021Source: arXiv (Cornell University)
Centrality measures are widely used to assign importance to graph-structured data. Recently, understanding the principles of such measures has attracted a lot of attention. Given that measures are div...
Graphing else matters: exploiting aspect opinions and ratings in explainable graph-based recommendations
Authors: Denis Parra, Andrés Carvallo, Iván Cantador et al.
Year: 2021Source: arXiv (Cornell University)
The success of neural network embeddings has entailed a renewed interest in using knowledge graphs for a wide variety of machine learning and information retrieval tasks. In particular, current recomm...
Graph Pattern Matching in GQL and SQL/PGQ
Authors: Domagoj Vrgoč, Oskar van Rest, Stefan Plantikow et al.
Year: 2021Source: arXiv (Cornell University)
As graph databases become widespread, JTC1 -- the committee in joint charge of information technology standards for the International Organization for Standardization (ISO), and International Electrot...
Approximate Normalization and Eager Equality Checking for Gradual Inductive Families
Authors: Eric Tanter, Ronald Garcia, Joseph Eremondi
Year: 2021Source: arXiv (Cornell University)
Harnessing the power of dependently typed languages can be difficult. Programmers must manually construct proofs to produce well-typed programs, which is not an easy task. In particular, migrating cod...
Gradual Program Analysis for Null Pointers
Authors: Eric Tanter, Johannes Bader, Joshua Sunshine et al.
Year: 2021Source: arXiv (Cornell University)
Static analysis tools typically address the problem of excessive false positives by requiring programmers to explicitly annotate their code. However, when faced with incomplete annotations, many analy...
The Multiverse: Logical Modularity for Proof Assistants
Authors: Eric Tanter, Kenji Maillard, Nicolas Tabareau et al.
Year: 2021Source: arXiv (Cornell University)
Proof assistants play a dual role as programming languages and logical systems. As programming languages, proof assistants offer standard modularity mechanisms such as first-class functions, type poly...
Improving Video Captioning with Temporal Composition of a Visual-Syntactic Embedding
Authors: Jesus Perez-Martin, Jorge Pérez, Benjamín Bustos
Year: 2021
Video captioning is the task of predicting a semantic and syntactically correct sequence of words given some context video. The most successful methods for video captioning have a strong dependency on...
A Convolutional Architecture for 3D Model Embedding
Authors: Benjamín Bustos, Ivan Sipiran, Arniel Labrada
Year: 2021Source: arXiv (Cornell University)
During the last years, many advances have been made in tasks like3D model retrieval, 3D model classification, and 3D model segmentation.The typical 3D representations such as point clouds, voxels, and...
A Comprehensive Review of the Video-to-Text Problem
Authors: Jorge Pérez, Benjamín Bustos, Ivan Sipiran et al.
Year: 2021Source: arXiv (Cornell University)
Research in the Vision and Language area encompasses challenging topics that seek to connect visual and textual information. When the visual information is related to videos, this takes us into Video-...
Cross-lingual hate speech detection based on multilingual domain-specific word embeddings
Authors: Jorge Pérez, Bárbara Poblete, Aymé Arango
Year: 2021Source: arXiv (Cornell University)
Automatic hate speech detection in online social networks is an important open problem in Natural Language Processing (NLP). Hate speech is a multidimensional issue, strongly dependant on language and...
Replication Data for Gendered Bureaucracies: Women Mayors and the Size and Composition of Local Governments
Authors: Carla Alberti, Diego Díaz Rioseco, Giancarlo Visconti
Year: 2021Source: Harvard Dataverse
While women are underrepresented in politics, recent improvements in women’s representation in legislative and executive bodies have spurred academic interest in the effects of electing women on a w...
Merging Web Tables for Relation Extraction with Knowledge Graphs
Authors: Aidan Hogan, Henry Rosales-Méndez, Emir Muñoz et al.
Year: 2021Source: IEEE Transactions on Knowledge and Data Engineering
We propose methods for extracting triples from Wikipedia’s HTML tables using a reference knowledge graph. Our methods use a distant-supervision approach to find existing triples in the knowledge gra...
The Semantic Web: ESWC 2021 Satellite Events
Authors: Aidan Hogan, Claudia d’Amato, Riccardo Tommasini et al.
Year: 2021Source: Lecture notes in computer science
Question Answering over Knowledge Graphs with Neural Machine Translation and Entity Linking
Authors: Aidan Hogan, Daniel Diomedi
Year: 2021Source: arXiv (Cornell University)
The goal of Question Answering over Knowledge Graphs (KGQA) is to find answers for natural language questions over a knowledge graph. Recent KGQA approaches adopt a neural machine translation (NMT) ap...
Fine-Grained Evaluation for Entity Linking
Authors: Aidan Hogan, Bárbara Poblete, Henry Rosales-Méndez
Year: 2021Source: SSRN Electronic Journal
The Entity Linking (EL) task identifies entity mentions in a text corpus and associates them with an unambiguous identifier in a Knowledge Base. While much work has been done on the topic, we first pr...
MillenniumDB: A Persistent, Open-Source, Graph Database
Authors: Cristian Riveros, Aidan Hogan, Carlos Buil-Aranda et al.
Year: 2021Source: arXiv (Cornell University)
In this systems paper, we present MillenniumDB: a novel graph database engine that is modular, persistent, and open source. MillenniumDB is based on a graph data model, which we call domain graphs, th...
Time- and Space-Efficient Regular Path Queries on Graphs
Authors: Aidan Hogan, Gonzalo Navarro, Diego Arroyuelo et al.
Year: 2021Source: arXiv (Cornell University)
We introduce a time- and space-efficient technique to solve regularpath queries over labeled graphs. We combine a bit-parallel simula-tion of the Glushkov automaton of the regular expression with ther...
Correction to: The Semantic Web: ESWC 2021 Satellite Events
Authors: Aidan Hogan, Claudia d’Amato, Riccardo Tommasini et al.
Year: 2021Source: Lecture notes in computer science
A Survey of RDF Stores & SPARQL Engines for Querying Knowledge Graphs
Authors: Aidan Hogan, Axel-Cyrille Ngonga Ngomo, Bin Yao et al.
Year: 2021Source: arXiv (Cornell University)
RDF has seen increased adoption in recent years, prompting the standardization of the SPARQL query language for RDF, and the development of local and distributed engines for processing SPARQL queries....
Divisive politics and democratic dangers in Latin America
Authors: Carla Alberti, Juan Pablo Luna
Year: 2021
PolyLM: Learning about Polysemy through Language Modeling
Authors: Felipe Bravo-Márquez, Bernhard Pfahringer, Alan D. Ansell
Year: 2021Source: arXiv (Cornell University)
To avoid the "meaning conflation deficiency" of word embeddings, a number of models have aimed to embed individual word senses. These methods at one time performed well on tasks such as word sense ind...
PFP Compressed Suffix Trees
Authors: Gonzalo Navarro, Travis Gagie, Giovanni Manzini et al.
Year: 2021Source: Society for Industrial and Applied Mathematics eBooks
Prefix-free parsing (PFP) was introduced by Boucher et al. (2019) as a preprocessing step to ease the computation of Burrows-Wheeler Transforms (BWTs) of genomic databases. Given a string S, it produc...
On Stricter Reachable Repetitiveness Measures
Authors: Gonzalo Navarro, C. Urbina
Year: 2021Source: Lecture notes in computer science
An LMS-Based Grammar Self-index with Local Consistency Properties
Authors: Gonzalo Navarro, Diego Díaz-Domínguez, Alejandro Pacheco
Year: 2021Source: Lecture notes in computer science
On the Complexity of SHAP-Score-Based Explanations: Tractability via Knowledge Compilation and Non-Approximability Results
Authors: Pablo Barceló, Leopoldo Bertossi, Marcelo Arenas et al.
Year: 2021Source: arXiv (Cornell University)
In Machine Learning, the $\mathsf{SHAP}$-score is a version of the Shapley value that is used to explain the result of a learned model on a specific entity by assigning a score to every feature. While...
Inconsistency Tolerance (Dagstuhl Seminar 03241)
Authors: Leopoldo Bertossi, Anthony Hunter, Torsten Schaub et al.
Year: 2021
Extending Sticky-Datalog+/- via Finite-Position Selection Functions: Tractability, Algorithms, and Optimization
Authors: Leopoldo Bertossi, Mostafa Milani
Year: 2021Source: arXiv (Cornell University)
Weakly-Sticky(WS) Datalog+/- is an expressive member of the family of Datalog+/- program classes that is defined on the basis of the conditions of stickiness and weak-acyclicity. Conjunctive query ans...
Reasoning about Counterfactuals and Explanations: Problems, Results and Directions
Authors: Leopoldo Bertossi
Year: 2021Source: arXiv (Cornell University)
There are some recent approaches and results about the use of answer-set programming for specifying counterfactual interventions on entities under classification, and reasoning about them. These appro...
Answer-Set Programs for Reasoning about Counterfactual Interventions and Responsibility Scores for Classification
Authors: Leopoldo Bertossi, Gabriela Reyes
Year: 2021Source: arXiv (Cornell University)
We describe how answer-set programs can be used to declaratively specify counterfactual interventions on entities under classification, and reason about them. In particular, they can be used to define...
Semantics in Databases (Dagstuhl Seminar 01021)
Authors: Leopoldo Bertossi, Bernhard Thalheim, Gyula O. H. Katona et al.
Year: 2021
Second-Order Specifications and Quantifier Elimination for Consistent Query Answering in Databases
Authors: Leopoldo Bertossi
Year: 2021Source: arXiv (Cornell University)
Consistent answers to a query from a possibly inconsistent database are answers that are simultaneously retrieved from every possible repair of the database. Repairs are consistent instances that mini...
Score-Based Explanations in Data Management and Machine Learning: An Answer-Set Programming Approach to Counterfactual Analysis
Authors: Leopoldo Bertossi
Year: 2021Source: arXiv (Cornell University)
We describe some recent approaches to score-based explanations for query answers in databases and outcomes from classification models in machine learning. The focus is on work done by the author and c...
Foundations of Symbolic Languages for Model Interpretability
Authors: Pablo Barceló, Jorge Pérez, Marcelo Arenas et al.
Year: 2021Source: arXiv (Cornell University)
Several queries and scores have recently been proposed to explain individual predictions over ML models. Given the need for flexible, reliable, and easy-to-apply interpretability methods for ML models...
Temporal Regular Path Queries
Authors: Marcelo Arenas, Julia Stoyanovich, Amir Aghasadeghi et al.
Year: 2021Source: arXiv (Cornell University)
In the last decade, substantial progress has been made towards standardizing the syntax of graph query languages, and towards understanding their semantics and complexity of evaluation. In this paper,...
Inspecting the concept knowledge graph encoded by modern language models
Authors: Marcelo Mendoza, Álvaro Soto, Carlos Aspillaga
Year: 2021
The field of natural language understanding has experienced exponential progress in the last few years, with impressive results in several tasks.This success has motivated researchers to study the und...
Augmenting BERT-style Models with Predictive Coding to Improve Discourse-level Representations
Authors: Marcelo Mendoza, Álvaro Soto, Vladimir Araujo et al.
Year: 2021Source: Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing
Current language models are usually trained using a self-supervised scheme, where the main focus is learning representations at the word or sentence level. However, there has been limited progress in ...
Neural Abstractive Unsupervised Summarization of Online News Discussions
Authors: Marcelo Mendoza, Evangelos Milios, Ignacio Tampe Palma
Year: 2021Source: arXiv (Cornell University)
Summarization has usually relied on gold standard summaries to train extractive or abstractive models. Social media brings a hurdle to summarization techniques since it requires addressing a multi-doc...
Inspecting the concept knowledge graph encoded by modern language models
Authors: Marcelo Mendoza, Álvaro Soto, Carlos Aspillaga
Year: 2021Source: arXiv (Cornell University)
The field of natural language understanding has experienced exponential progress in the last few years, with impressive results in several tasks. This success has motivated researchers to study the un...
Augmenting BERT-style Models with Predictive Coding to Improve Discourse-level Representations
Authors: Marcelo Mendoza, Álvaro Soto, Vladimir Araujo et al.
Year: 2021Source: arXiv (Cornell University)
Current language models are usually trained using a self-supervised scheme, where the main focus is learning representations at the word or sentence level. However, there has been limited progress in ...
A Compact Answer Set Programming Encoding of Multi-Agent Pathfinding
Authors: Jorge Baier, Carlos Hernández, Rodrigo Gómez
Year: 2021Source: IEEE Access
Multi-agent pathfinding (MAPF) is the problem of finding k non-colliding paths connecting k given initial positions with k given goal positions on a given map. In its sum-of-costs variant, the total n...
Exploiting Learned Policies in Focal Search
Authors: Jorge Baier, Matias Greco, Pablo Araneda
Year: 2021Source: arXiv (Cornell University)
Recent machine-learning approaches to deterministic search and domain-independent planning employ policy learning to speed up search. Unfortunately, when attempting to solve a search problem by succes...
Graph Neural Networks with Local Graph Parameters
Authors: Pablo Barceló, Juan Reutter, Floris Geerts et al.
Year: 2021Source: arXiv (Cornell University)
Various recent proposals increase the distinguishing power of Graph Neural Networks GNNs by propagating features between $k$-tuples of vertices. The distinguishing power of these "higher-order'' GNNs ...
Protein_alignments_Fig2_Flores-Ríos_2018
Authors: Sebastián Valenzuela, Mauricio Arenas‐Salinas, Omar Orellana et al.
Year: 2021Source: Figshare
Amino acid sequence alignments for predicted proteins encoded within conjugative gene clusters in public 30 acidithiobacilli genomes. Files are in FASTA format. <br>
Q10428
Authors: Sebastián Valenzuela, Dall Orso, Rayén Condeza
Year: 2021Source: Cuadernos info
2020, p. I).
An irregularly spaced first-order moving average model
Authors: Susana Eyheramendy, Wilfredo Palma, César Ojeda et al.
Year: 2021Source: arXiv (Cornell University)
A novel first-order moving-average model for analyzing time series observed at irregularly spaced intervals is introduced. Two definitions are presented, which are equivalent under Gaussianity. The fi...
A data-driven strategy to combine word embeddings in information retrieval
Authors: Marcelo Mendoza, Alfredo Silva
Year: 2021Source: arXiv (Cornell University)
Word embeddings are vital descriptors of words in unigram representations of documents for many tasks in natural language processing and information retrieval. The representation of queries has been o...
Power-Law Distributed Graph Generation With MapReduce
Authors: Renzo Angles, Rodrígo Paredes, Fernanda Lopez-Gallegos
Year: 2021Source: IEEE Access
A graph generator is a tool which allows to create graph-like data whose structural properties are very similar to those found in real world networks. This paper presents two methods to generate graph...
Improving the Teaching-Learning Process in Engineering Through a Game-Based Web Support System: Edutrivias
Authors: Renzo Angles, Claudia Galarce-Miranda, Diego Gormaz-Lobos et al.
Year: 2021Source: Advances in intelligent systems and computing
Correction to: Serialization for Property Graphs
Authors: Renzo Angles, Dominik Tomaszuk, Diego Cisterna et al.
Year: 2021Source: Communications in computer and information science
Enhanced Word Embedding Variations for the Detection of Substance Abuse and Mental Health Issues on Social Media Writings
Authors: Ricardo Baeza-Yates, Diana Ramírez‐Cifuentes, Ana Freire et al.
Year: 2021Source: IEEE Access
Substance abuse and mental health issues are severe conditions that affect millions. Signs of certain conditions have been traced on social media through the analysis of posts. In this paper we analyz...
Publications for 2020
Displaying 304 publication(s) for 2020
Optimal-Time Dictionary-Compressed Indexes
Authors: Gonzalo Navarro, Nicola Prezza, Mikko Berggren Ettienne et al.
Year: 2020Source: ACM Transactions on Algorithms
We describe the first self-indexes able to count and locate pattern occurrences in optimal time within a space bounded by the size of the most popular dictionary compressors. To achieve this result, w...
Grammar-compressed indexes with logarithmic search time
Authors: Gonzalo Navarro, Francisco Claude, Alejandro Pacheco
Year: 2020Source: Journal of Computer and System Sciences
Cambio, despedida y bienvenida
Authors: Sebastián Valenzuela, Daniela Grassau
Year: 2020
Inspecting state of the art performance and NLP metrics in image-based medical report generation
Authors: Denis Parra, Cecilia Besa, Pablo Pino et al.
Year: 2020
Several deep learning architectures have been proposed over the last years to deal with the task of generating a written report given an imaging exam as input. Most works evaluate the generated report...
Neural language models for text classification in evidence-based medicine
Authors: Denis Parra, Andrés Carvallo, Juan Vasquez et al.
Year: 2020
COVID-19 has brought about a significant challenge to the whole of humanity, but mainly to the medical community. Clinicians must keep updated continuously about symptoms, diagnoses, and effectiveness...
The Future is Big Graphs! A Community View on Graph Processing Systems
Authors: Marcelo Arenas, Renzo Angles
Year: 2020
Adaptive Community Search in Dynamic Networks
Authors: Ricardo Baeza-Yates, Francesco Bonchi, Ioanna Tsalouchidou
Year: 2020Source: 2021 IEEE International Conference on Big Data (Big Data)
Community search is a well-studied problem which, given a static graph and a query set of vertices, requires to find a cohesive (or dense) subgraph containing the query vertices. In this paper we stud...
The Expressive Power of Graph Neural Networks as a Query Language
Authors: Pablo Barceló, Jorge Pérez, Juan Reutter et al.
Year: 2020Source: ACM SIGMOD Record
In this paper we survey our recent results characterizing various graph neural network (GNN) architectures in terms of their ability to classify nodes over graphs, for classifiers based on unary logic...
On the Approximation Ratio of Ordered Parsings
Authors: Gonzalo Navarro, Nicola Prezza, Carlos Ochoa
Year: 2020Source: IEEE Transactions on Information Theory
Shannon's entropy is a clear lower bound for statistical compression. The situation is not so well understood for dictionary-based compression. A plausible lower bound is <inline-formula xmlns:mml="ht...
Learning to combine classifiers outputs with the transformer for text classification
Authors: Marcelo Mendoza, Margarita Bugueño
Year: 2020
Learning to combine classifiers outputs with the transformer for text classification
Authors: Marcelo Mendoza, Margarita Bugueño
Year: 2020Source: Intelligent Data Analysis
Text classification is a fairly explored task that has allowed dealing with a considerable amount of problems. However, one of its main difficulties is to conduct a learning process in data with class...
Predicting risk of dyslexia with an online gamified test
Authors: Ricardo Baeza-Yates, Luz Rello, Jeffrey P. Bigham et al.
Year: 2020Source: PLoS ONE
Dyslexia is a specific learning disorder related to school failure. Detection is both crucial and challenging, especially in languages with transparent orthographies, such as Spanish. To make detectin...
Algorithmic and HCI Aspects for Explaining Recommendations of Artistic Images
Authors: Pablo Messina, Vicente Domínguez, Denis Parra et al.
Year: 2020Source: ACM Transactions on Interactive Intelligent Systems
Explaining suggestions made by recommendation systems is key to make users trust and accept these systems. This is specially critical in areas such as art image recommendation. Traditionally, artworks...
Special Issue on Database Theory
Authors: Pablo Barceló, Marco Calautti
Year: 2020Source: Theory of Computing Systems
Fine-Grained Entity Linking
Authors: Aidan Hogan, Bárbara Poblete, Henry Rosales-Méndez
Year: 2020Source: Journal of Web Semantics
Neural language models for text classification in evidence-based medicine
Authors: Denis Parra, Gabriel Rada, Andrés Carvallo et al.
Year: 2020
Automatic document screening of medical literature using word and text embeddings in an active learning setting
Authors: Denis Parra, Álvaro Soto, Hans Löbel et al.
Year: 2020Source: Scientometrics
How to Handle Health-Related Small Imbalanced Data in Machine Learning?
Authors: Ricardo Baeza-Yates, Maria Rauschenberger
Year: 2020Source: i-com
Abstract When discussing interpretable machine learning results, researchers need to compare them and check for reliability, especially for health-related data. The reason is the negative impact of wr...
The Chilean Waiting List Corpus
Authors: Felipe Bravo-Márquez, Jocelyn Dunstan, Fabián Villena et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
Here we describe a new clinical corpus rich in nested entities and a series of neural models to identify them. The corpus comprises de-identified referrals from the waiting list in Chilean public hosp...
The Chilean Waiting List Corpus
Authors: Felipe Bravo-Márquez, Jocelyn Dunstan, Fabián Villena et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
Here we describe a new clinical corpus rich in nested entities and a series of neural models to identify them. The corpus comprises de-identified referrals from the waiting list in Chilean public hosp...
The Chilean Waiting List Corpus
Authors: Felipe Bravo-Márquez, Jocelyn Dunstan, Fabián Villena et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
Here we describe a new clinical corpus rich in nested entities and a series of neural models to identify them. The corpus comprises de-identified referrals from the waiting list in Chilean public hosp...
The Chilean Waiting List Corpus
Authors: Felipe Bravo-Márquez, Jocelyn Dunstan, Fabián Villena et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
Here we describe a new clinical corpus rich in nested entities and a series of neural models to identify them. The corpus comprises de-identified referrals from the waiting list in Chilean public hosp...
The Chilean Waiting List Corpus
Authors: Felipe Bravo-Márquez, Jocelyn Dunstan, Fabián Villena et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
In this work we describe the Waiting List Corpus consisting of de-identified referrals for several specialty consultations from the waiting list in Chilean public hospitals. A subset of 3000 referrals...
Characterization of Anorexia Nervosa on Social Media: Textual, Visual, Relational, Behavioral, and Demographical Analysis (Preprint)
Authors: Ricardo Baeza-Yates, Nadia Sanz Lamora, Diego Alejandro Velazquez et al.
Year: 2020
<sec> <title>BACKGROUND</title> Eating disorders are psychological conditions characterized by unhealthy eating habits. Anorexia nervosa (AN) is defined as the belief of being overweight despite being...
Gradualizing the Calculus of Inductive Constructions
Authors: Eric Tanter, Kenji Maillard, Meven Lennon-Bertrand et al.
Year: 2020Source: ACM Transactions on Programming Languages and Systems
We investigate gradual variations on the Calculus of Inductive Construction (CIC) for swifter prototyping with imprecise types and terms. We observe, with a no-go theorem, a crucial tradeoff between g...
Probabilistic automata of bounded ambiguity
Authors: Cristian Riveros, Nathanaël Fijalkow, James Worrell
Year: 2020Source: Information and Computation
Setting the agenda: The news media and public opinion, 3rd edition
Authors: Sebastián Valenzuela, Maxwell McCombs
Year: 2020
Supporting the Classification of Patients in Public Hospitals in Chile by Designing, Deploying and Validating a System Based on Natural Language Processing
Authors: Jocelyn Dunstan, Fabián Villena, René Lagos et al.
Year: 2020Source: Research Square (Research Square)
Abstract BackgroundIn Chile, a patient needing a specialty consultation or surgery has to first be referred by a general practitioner, then placed on a waiting list. The Explicit Health Guarantees (GE...
Block trees
Authors: Gonzalo Navarro, Travis Gagie, Djamal Belazzougui et al.
Year: 2020Source: Journal of Computer and System Sciences
Inspecting state of the art performance and NLP metrics in image-based medical report generation
Authors: Pablo Messina, Denis Parra, Pablo Pino et al.
Year: 2020
The ALeRCE Light Curve Classifier: labeled set, features, and classifications
Authors: Susana Eyheramendy, M. Catelan, J. Borissova et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
Labeled set, features, and classifications of the ZTF alert stream (up to 2020/06/09) presented in the article "Alert Classification for the ALeRCE Broker System: The Light Curve Classifier", Sánchez...
The ALeRCE Light Curve Classifier: labeled set, features, and classifications
Authors: Susana Eyheramendy, M. Catelan, J. Borissova et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
Labeled set, features, and classifications of the ZTF alert stream (up to 2020/06/09) presented in the article "Alert Classification for the ALeRCE Broker System: The Light Curve Classifier", Sánchez...
New initialization for algorithms to solve Median String Problem
Authors: Pedro Mirabal, José Abreu, Oscar Pedreira et al.
Year: 2020
A Hybrid Compressed Data Structure Supporting Rank and Select on Bit Sequences
Authors: Diego Arroyuelo, Manuel Weitzman
Year: 2020
We introduce a practical data structure for supporting the fundamental operations rank, select, and member on integer sets (and their corresponding characteristic bit vector). Our data structure uses ...
FAIS: A System for Effectively Learning Students Names and Faces in Massive Courses
Authors: Jorge Baier, Jorge Muñoz-Gama, Raul Alvarez-Esteban et al.
Year: 2020
Low classroom engagement and distractions are important challenges of massive courses. The literature shows that those problems could decrease when the teacher addresses the students by their names. L...
SiGeCo: Customizable peer assessment management system for teaching-learning process
Authors: Sebastián Valenzuela, Luís Silvestre
Year: 2020
Teamwork activities can create difficulties for teachers to evaluate the performance of the members. To address this challenge a peer evaluation, also known as peer assessment, is usually applied. In ...
Declarative Approaches to Counterfactual Explanations for Classification
Authors: Leopoldo Bertossi
Year: 2020
I Don’t Want You to Be My President! Incivility and Media Bias During the Presidential Election in Chile
Authors: Magdalena Saldaña, Andrés Rosenberg
Year: 2020Source: Social Media + Society
This study observes two relevant issues in today’s media ecosystem: incivility in online news comments and media bias during election periods. By analyzing 84 stories and 4670 comments published dur...
Gradual verification of recursive heap data structures
Authors: Eric Tanter, Jenna Wise, Johannes Bader et al.
Year: 2020Source: Proceedings of the ACM on Programming Languages
Current static verification techniques do not provide good support for incrementality, making it difficult for developers to focus on specifying and verifying the properties and components that are mo...
Querying the Semantic Web via Rules
Authors: Marcelo Arenas, Georg Gottlob, Andréas Pieris
Year: 2020Source: Studies on the semantic web
The problem of querying RDF data is a central issue for the development of the Semantic Web. The query language SPARQL has become the standard language for querying RDF since its W3C standardization i...
Semantic Optimization of Conjunctive Queries
Authors: Pablo Barceló, Andreas Pieris, Diego Figueira et al.
Year: 2020Source: Journal of the ACM
This work deals with the problem of semantic optimization of the central class of conjunctive queries (CQs). Since CQ evaluation is NP-complete, a long line of research has focussed on identifying fra...
Specifying and computing causes for query answers in databases via database repairs and repair-programs
Authors: Leopoldo Bertossi
Year: 2020Source: Knowledge and Information Systems
An index for moving objects with constant-time access to their compressed trajectories
Authors: Nieves Brisaboa, Travis Gagie, Gonzalo Navarro et al.
Year: 2020Source: International Journal of Geographical Information Science
As the number of vehicles and devices equipped with GPS technology has grown explosively, an urgent need has arisen for time- and space-efficient data structures to represent their trajectories. The m...
In-Database Graph Analytics with Recursive SPARQL
Authors: Aidan Hogan, Juan Reutter, Adrián Soto
Year: 2020Source: Lecture notes in computer science
Minding the AI Gap in LATAM
Authors: Jorge Pérez, Bárbara Poblete
Year: 2020Source: Communications of the ACM
research-article Share on Minding the AI gap in LATAM Authors: Barbara Poblete Universidad de Chile and Millennium Institute for Foundational Research on Data, Santiago, Chile Universidad de Chile and...
Three Success Stories About Compact Data Structures
Authors: Diego Seco, Diego Arroyuelo, José Fuentes-Sepúlveda et al.
Year: 2020Source: Communications of the ACM
No abstract available.
Chile's new interdisciplinary institute for foundational research on data
Authors: Pablo Barceló, Marcelo Arenas
Year: 2020Source: Communications of the ACM
research-article Share on Chile's new interdisciplinary institute for foundational research on data Authors: Marcelo Arenas Universidad Católica and IMFD in Santiago, Chile Universidad Católica and ...
GENE: Graph generation conditioned on named entities for polarity and controversy detection in social media
Authors: Denis Parra, Marcelo Mendoza, Álvaro Soto
Year: 2020Source: Information Processing & Management
Gobernanza en ciudades portuarias. Aprendizajes desde el Área Metropolitana de Concepción
Authors: Sergio Toro-Maureira, Mabel Alarcón, Violeta Montero et al.
Year: 2020
Extending SPARQL with Similarity Joins
Authors: Aidan Hogan, Sebastián Ferrada, Benjamín Bustos
Year: 2020Source: Lecture notes in computer science
Differential Privacy and SPARQL
Authors: Federico Olmedo, Carlos Buil-Aranda, Jorge Lobo
Year: 2020
Querying APIs with SPARQL: Language and Worst-Case Optimal Algorithm
Authors: Juan Reutter, Domagoj Vrgoč, Matthieu Mosser et al.
Year: 2020Source: Lecture notes in computer science
Versioned Queries over RDF Archives: All You Need is SPARQL?
Authors: Aidan Hogan, Ignacio Cuevas
Year: 2020
Global Vertex Similarity for Large-Scale Knowledge Graphs
Authors: Aidan Hogan, Marco Caballero
Year: 2020
Suggesting Citations for Wikidata Claims basedon Wikipedia’s External References
Authors: Aidan Hogan, Pablo Curotto
Year: 2020
Model Interpretability through the Lens of Computational Complexity
Authors: Pablo Barceló, Jorge Pérez
Year: 2020
Welcome
Authors: Gonzalo Navarro, Virgı́lio Almeida, Sergio Rajsbaum
Year: 2020Source: Communications of the ACM
introduction Share on Welcome Authors: Virgilio Almeida Harvard University, Cambridge, MA Harvard University, Cambridge, MAView Profile , Gonzalo Navarro University of Chile, in Santiago University of...
Contextual Linear Types for Differential Privacy
Authors: Matías Toro, Eric Tanter, Federico Olmedo et al.
Year: 2020
Offering an Entrepreneurship Course to All Engineering Students: Self-efficacy Gains and Learning Benefits
Authors: Jorge Baier, Isabel Hilliger, Mar Pérez‐Sanagustín et al.
Year: 2020Source: 2021 IEEE Frontiers in Education Conference (FIE)
In order to develop an entrepreneurial mindset in future engineers, entrepreneurial training has become a key aspect of engineering education. Following this trend, a large and prestigious engineering...
A Survey on Deep Learning and Explainability for Automatic Image-based Medical Report Generation
Authors: Pablo Messina, Denis Parra, Álvaro Soto et al.
Year: 2020
Recursion in SPARQL
Authors: Juan Reutter, Domagoj Vrgoč, Adrián Soto
Year: 2020Source: Semantic Web
The need for recursive queries in the Semantic Web setting is becoming more and more apparent with the emergence of datasets where different pieces of information are connected by complicated patterns...
Knowledge Graphs: A Tutorial on the History of Knowledge Graph's Main Ideas
Authors: Claudio Gutiérrez, Juan Sequeda
Year: 2020
Knowledge Graphs can be considered as fulfilling an early vision in Computer Science of creating intelligent systems that integrate knowledge and data at large scale. Stemming from scientific advancem...
Laconic Image Classification: Human vs. Machine Performance
Authors: Aidan Hogan, Jorge Pérez, Javier Carrasco
Year: 2020
We propose laconic classification as a novel way to understand and compare the performance of diverse image classifiers. The goal in this setting is to minimise the amount of information (aka. entropy...
Knowledge Graphs: Research Directions
Authors: Aidan Hogan
Year: 2020Source: Lecture notes in computer science
Bots in Social and Interaction Networks: Detection and Impact Estimation
Authors: Marcelo Mendoza, Maurizio Tesconi, Stefano Cresci
Year: 2020Source: ACM transactions on office information systems
The rise of bots and their influence on social networks is a hot topic that has aroused the interest of many researchers. Despite the efforts to detect social bots, it is still difficult to distinguis...
Gradual Verification of Recursive Heap Data Structures
Authors: Eric Tanter, Joshua Sunshine, Cameron Wong et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
AMW 2019 Special Issue
Authors: Aidan Hogan, Tova Milo
Year: 2020Source: Information Systems
Gradual Verification of Recursive Heap Data Structures
Authors: Eric Tanter, Joshua Sunshine, Cameron Wong et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
Analyzing the effect of the topology on succinct tree encodings
Authors: Diego Seco, José Fuentes Sepúlveda, Alexander Irribarra
Year: 2020
Constant-delay enumeration algorithms for document spanners over nested documents
Authors: Cristian Riveros, Martín Muñoz
Year: 2020
Peripheral elaboration model: The impact of incidental news exposure on political participation
Authors: Magdalena Saldaña, Saif Shahin, Homero Gil de Zúñiga
Year: 2020Source: Journal of Information Technology & Politics
This study places the “cognitive elaboration model” on news gathering and political behavior within the dual-processing “elaboration likelihood model” to derive hypotheses about the effects of...
Predecessor Search
Authors: Gonzalo Navarro, Javiel Rojas-Ledesma
Year: 2020Source: ACM Computing Surveys
The predecessor problem is a key component of the fundamental sorting-and-searching core of algorithmic problems. While binary search is the optimal solution in the comparison model, more realistic ma...
A MOOC-based flipped experience: Scaffolding SRL strategies improves learners' time management and engagement
Authors: Jorge Baier, Isabel Hilliger, Mar Pérez‐Sanagustín et al.
Year: 2020Source: Computer Applications in Engineering Education
Abstract Higher education institutions are increasingly considering the use of a form of blended learning, commonly named as flipped classroom (FC), in which students watch video lectures drawn from a...
Scalable recommendation of wikipedia articles to editors using representation learning
Authors: Denis Parra, Oleksii Moskalenko, Diego Saez-Trumper
Year: 2020
CuratorNet: Visually-aware recommendation of art images
Authors: Felipe del Rio, Pablo Messina, Denis Parra et al.
Year: 2020
Mining Social Networks to Learn about Rumors, Hate Speech, Bias and Polarization - Abstract
Authors: Bárbara Poblete
Year: 2020
Score-Based Explanations in Data Management and Machine Learning: An Answer-Set Programming Approach to Counterfactual Analysis
Authors: Leopoldo Bertossi
Year: 2020Source: Reasoning Web. Declarative Artificial Intelligence. Reasoning Web 2021
Improving query expansion strategies with word embeddings
Authors: Marcelo Mendoza, Alfredo Silva
Year: 2020
Representation learning has been a fruitful area in recent years, driven by the growing interest in deep learning methods. In particular, word representation learning, a.k.a. word embeddings has trigg...
Interpretable Contextual Team-aware Item Recommendation: Application in Multiplayer Online Battle Arena Games
Authors: Denis Parra, Vladimir Araujo, Andrés Villa et al.
Year: 2020
The video game industry has adopted recommendation systems to boost users interest with a focus on game sales. Other exciting applications within video games are those that help the player make decisi...
Bias in Search and Recommender Systems
Authors: Ricardo Baeza-Yates
Year: 2020
We explore the vicious cycle of bias on the Web related to search and recommender systems. The first bias is activity bias [1], called by Nielsen participation inequality in Internet [3]. This means t...
Compact structure for sparse undirected graphs based on a clique graph partition
Authors: Felipe Glaria, Cecilia Hernandez, Susana Ladra et al.
Year: 2020Source: Information Sciences
Author Correction: Reclassifying neurodegenerative diseases
Authors: Ricardo Baeza-Yates, Pablo Villoslada, Joseph C. Masdeu
Year: 2020Source: Nature Biomedical Engineering
"DCC-Uchile at SemEval-2020 Task 1: Temporal Referencing Word Embeddings"
Authors: Felipe Bravo-Márquez, Frank Zamora
Year: 2020
3D Shape Matching for Retrieval and Recognition
Authors: Benjamín Bustos, Ivan Sipiran
Year: 2020Source: Springer eBooks
Tree Path Majority Data Structures
Authors: Travis Gagie, Meng He, Gonzalo Navarro et al.
Year: 2020Source: Theoretical Computer Science
Work in Progress: Engaging Engineering Teaching Staff in Continuous Improvement Process
Authors: Jorge Baier, Isabel Hilliger, Mar Pérez‐Sanagustín et al.
Year: 2020
Abstract External influences to schools of engineering have resulted in important curriculum changes. Over the two decades, the influence of the Accreditation Board of Engineering and Technology (ABET...
Resource Description Framework
Authors: Aidan Hogan
Year: 2020Source: Springer eBooks
SPARQL Query Language
Authors: Aidan Hogan
Year: 2020Source: Springer eBooks
Shape Constraints and Expressions
Authors: Aidan Hogan
Year: 2020Source: Springer eBooks
The Web of Data
Authors: Aidan Hogan
Year: 2020Source: Springer eBooks
Linked Data
Authors: Aidan Hogan
Year: 2020Source: Springer eBooks
RDF Schema and Semantics
Authors: Aidan Hogan
Year: 2020Source: Springer eBooks
Web Ontology Language
Authors: Aidan Hogan
Year: 2020Source: Springer eBooks
What is Care in Engineering Teaching?
Authors: Jorge Baier, Isabel Hilliger, Constanza Melian et al.
Year: 2020Source: 2020 ASEE Virtual Annual Conference Content Access Proceedings
Abstract The concept of care in teaching has been associated with the development of supportive, personalized relationships between teachers and students, and with the development of an emotionally sa...
Work in Progress: What Makes Courses Demanding in Engineering Education? A Combination of Mixed Methods and Grounded Theory Research
Authors: Jorge Baier, Isabel Hilliger, Constanza Melian et al.
Year: 2020Source: 2020 ASEE Virtual Annual Conference Content Access Proceedings
Abstract Due to external influences, such as internationalization and technological changes, engineering curricula have incorporated an increasing number of contents and competencies. Future engineers...
Efficient Logspace Classes for Enumeration, Counting, and Uniform Generation
Authors: Cristian Riveros, Marcelo Arenas, Luis Alberto Croquevielle et al.
Year: 2020Source: ACM SIGMOD Record
We study two simple yet general complexity classes, which provide a unifying framework for efficient query evaluation in areas like graph databases and information extraction, among others. We investi...
Explaining VQA predictions using visual grounding and a knowledge base
Authors: Juan Carlos Niebles, Yundong Zhang, Felipe Riquelme et al.
Year: 2020
3D-printed foot prosthesis during gait: Comparison with two standard prostheses
Authors: Aidan Hogan, Ursula Trinler, Mathias Rehg et al.
Year: 2020Source: Gait & Posture
Storage, Indexing, Query Processing, and Benchmarking in Centralized and Distributed RDF Engines: A Survey
Authors: Aidan Hogan, Axel-Cyrille Ngonga Ngomo, Waqas Ali et al.
Year: 2020
The recent advancements of the Semantic Web and Linked Data have changed the working of the traditional web. There is significant adoption of the Resource Description Framework (RDF) format for saving...
External References of English Wikipedia (ref-wiki-en)
Authors: Aidan Hogan, Paolo Curotto
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
<strong>External References of English Wikipedia </strong>(<strong>ref-wiki-en</strong>) is a corpus of the plain-text content of 2,475,461 external webpages linked from the reference section of artic...
External References of English Wikipedia (ref-wiki-en)
Authors: Aidan Hogan, Paolo Curotto
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
<strong>External References of English Wikipedia </strong>(<strong>ref-wiki-en</strong>) is a corpus of the plain-text content of 2,475,461 external webpages linked from the reference section of artic...
An ASP-Based Approach to Counterfactual Explanations for Classification
Authors: Leopoldo Bertossi
Year: 2020Source: Lecture notes in computer science
Reclassifying neurodegenerative diseases
Authors: Pablo Villoslada, Joseph C. Masdeu, Ricardo Baeza-Yates
Year: 2020Source: Nature Biomedical Engineering
A Multi-resolution Approximation for Time Series
Authors: Benjamín Bustos, Heider Sanchez
Year: 2020Source: Neural Processing Letters
SHREC 2020: Retrieval of digital surfaces with similar geometric reliefs
Authors: Santiago Velasco-Forero, Silvia Biasotti, Ramamoorthy Luxman et al.
Year: 2020Source: Computers & Graphics
Postadmixture Selection on Chileans Targets Haplotype Involved in Pigmentation, Thermogenesis and Immune Defense against Pathogens
Authors: Lucas Vicuña, Susana Eyheramendy, Tomás Norambuena et al.
Year: 2020Source: Genome Biology and Evolution
Detection of positive selection signatures in populations around the world is helping to uncover recent human evolutionary history as well as the genetic basis of diseases. Most human evolutionary gen...
Fast and Compact Planar Embeddings
Authors: Travis Gagie, Meng He, Gonzalo Navarro et al.
Year: 2020Source: Computational Geometry
Arabic dialect sentiment analysis with ZERO effort. Case study: Algerian dialect
Authors: Marcelo Mendoza, Imane Guellil, Faical Azoauau et al.
Year: 2020Source: INTELIGENCIA ARTIFICIAL
This paper presents an analytic study showing that it is entirely possible to analyze the sentiment of an Arabic dialect without constructing any resources. The idea of this work is to use the resourc...
Nuevos desafíos, enfoques y perspectivas para estudiar élites políticas
Authors: Juan Bautista Canavesi Sosa, José Zurita-Tapia, Juan Carlos Arellano González et al.
Year: 2020Source: DOAJ (DOAJ: Directory of Open Access Journals)
Esta seccion analiza los nuevos desafios, enfoques analiticos y metodologias para el estudio de diferentes elites politicas. En base a la literatura existente y la revision de casos de America Latina,...
Correcting for differential recruitment in respondent-driven sampling data using ego-network information
Authors: Isabelle Beaudry, Krista J. Gile
Year: 2020
R3MAT: A Rapid and Robust Graph Generator
Authors: Renzo Angles, Roberto García, Rodrigo Paredes
Year: 2020
Personalization, Bias and Privacy
Authors: Ricardo Baeza-Yates
Year: 2020
Personalization can be seen as a positive bias towards each user. However, it also has negative consequences such as privacy loss as well as the filter bubble or echo chamber effect due to the feedbac...
GENE: Graph generation conditioned on named entities
Authors: Denis Parra, Marcelo Mendoza, Álvaro Soto
Year: 2020
Using Deep Learning to Detect Rumors in Twitter
Authors: Marcelo Mendoza, Eliana Providel
Year: 2020Source: Lecture notes in computer science
Efficient GPU thread mapping on embedded 2D fractals
Authors: Benjamín Bustos, Nancy Hitschfeld, Cristobál A.Navarro et al.
Year: 2020Source: Future Generation Computer Systems
“Fake News is Anything They Say!”–Conceptualization and Weaponization of Fake News Among the American Public
Authors: Sebastián Valenzuela, Hernando Rojas, Chau Tong et al.
Year: 2020Source: Mass Communication & Society
This study examines the articulation of public opinion about so-called fake news using a national survey (N = 510) of U.S. adults conducted in 2018. We coded respondents' open-ended answers about what...
An efficient algorithm for approximated self-similarity joins in metric spaces.
Authors: Sebastián Ferrada, Benjamín Bustos, Nora Reyes et al.
Year: 2020Source: Information Systems
Long-term constitutive equations (aging factor approach)
Authors: Gonzalo Navarro, Borja Regúlez, David Fernández‐Ordóñez et al.
Year: 2020Source: Bulletin - FIB
Phenomenological study of restraint moments over the piers
Authors: Gonzalo Navarro, David Fernández‐Ordóñez, Pieter van der Zee et al.
Year: 2020Source: Bulletin - FIB
Estimation of the continuity forces
Authors: Gonzalo Navarro, Borja Regúlez, David Fernández‐Ordóñez et al.
Year: 2020Source: Bulletin - FIB
A User Interface for Exploring and Querying Knowledge Graphs (Extended Abstract)
Authors: Aidan Hogan, Carlos Buil-Aranda, Hernán Vargas et al.
Year: 2020
As the adoption of knowledge graphs grows, more and more non-experts users need to be able to explore and query such graphs. These users are not typically familiar with graph query languages such as S...
Solving a Special Case of the Intensional vs Extensional Conjecture in Probabilistic Databases
Authors: Mikael Monet
Year: 2020
WEFE: The Word Embeddings Fairness Evaluation Framework
Authors: Jorge Pérez, Felipe Bravo-Márquez, Pablo Valdés-Badilla
Year: 2020
Word embeddings are known to exhibit stereotypical biases towards gender, race, religion, among other criteria. Severa fairness metrics have been proposed in order to automatically quantify these bias...
Adversarial Evaluation of BERT for Biomedical Named Entity Recognition
Authors: Denis Parra, Vladimir Araujo, Andrés Carvallo
Year: 2020
The Chilean Waiting List Corpus
Authors: Jocelyn Dunstan, Fabián Villena, Matías Rojas et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
Referrals from the waiting list for several specialty consultations in Chilean public hospitals were used to create a de-identified clinical corpus. A subset of 900 referrals was manually annotated wi...
Chilean Waiting List Corpus Embeddings
Authors: Jocelyn Dunstan, Fabián Villena
Year: 2020
Introduction
Authors: Gonzalo Navarro, David Fernández‐Ordóñez, Pieter van der Zee et al.
Year: 2020Source: Bulletin - FIB
Bibliography
Authors: Gonzalo Navarro, Hugo Corres Peiretti, Maher K. Tadros et al.
Year: 2020Source: Bulletin - FIB
Parametric study
Authors: Gonzalo Navarro, David Fernández‐Ordóñez, Pieter van der Zee et al.
Year: 2020Source: Bulletin - FIB
References
Authors: Gonzalo Navarro, Hugo Corres Peiretti, Maher K. Tadros et al.
Year: 2020Source: Bulletin - FIB
Notation
Authors: Gonzalo Navarro, David Fernández‐Ordóñez, Pieter van der Zee et al.
Year: 2020Source: Bulletin - FIB
Scope
Authors: Gonzalo Navarro, David Fernández‐Ordóñez, Pieter van der Zee et al.
Year: 2020Source: Bulletin - FIB
Hate speech detection is not as easy as you may think: A closer look at model validation (extended version)
Authors: Jorge Pérez, Bárbara Poblete, Aymé Arango
Year: 2020Source: Information Systems
Crisis de la representación política en América Latina y los ciclos pendulares de coaliciones electorales oligárquicas y antisistema
Authors: Juan Pablo Luna
Year: 2020
Every Colour You Are: Stance Prediction and Turnaround in Controversial Issues
Authors: Mounia Lalmas, Ricardo Baeza-Yates, Eduardo Graells-Garrido
Year: 2020
Web platforms have allowed political manifestation and debate for decades. Technology changes have brought new opportunities for expression, and the availability of longitudinal data of these debates ...
Ties, Likes, and Tweets: Using Strong and Weak Ties to Explain Differences in Protest Participation Across Facebook and Twitter Use
Authors: Sebastián Valenzuela, Homero Gil de Zúñiga, Teresa Correa
Year: 2020Source: Routledge eBooks
Based on the theoretical concepts of social networks and technology affordances, this article argues that different social media platforms influence political participation through unique, yet complem...
Stronger and Safer Together: Motivations for and Challenges of (Trans)National Collaboration in Investigative Reporting in Latin America
Authors: Magdalena Saldaña, Lourdes M. Cueva Chacón
Year: 2020Source: Digital Journalism
Despite the growing scholarship on investigative journalism in Latin America, very few studies have addressed collaboration across newsrooms in the region. By analyzing the responses of 251 journalist...
The Limits of Efficiency for Open- and Closed-World Query Evaluation under Guarded TGDs
Authors: Pablo Barceló, Carsten Lutz, Victor Dalmau et al.
Year: 2020
Ontology-mediated querying and querying in the presence of constraints are two key database problems where tuple-generating dependencies (TGDs) play a central role. In ontology-mediated querying, TGDs...
Differentiable adaptive computation time for visual reasoning
Authors: Álvaro Soto, Cristóbal Eyzaguirre
Year: 2020
Causality-based Explanation of Classification Outcomes
Authors: Leopoldo Bertossi, Jordan Li, Maximilian Schleich et al.
Year: 2020
We propose a simple definition of an explanation for the outcome of a classifier based on concepts from causality. We compare it with previously proposed notions of explanation, and study their comple...
Abstracting gradual references
Authors: Matías Toro, Eric Tanter
Year: 2020Source: Science of Computer Programming
Counting Problems over Incomplete Databases
Authors: Pablo Barceló, Marcelo Arenas, Mikael Monet et al.
Year: 2020
We study the complexity of various fundamental counting problems that arise in the context of incomplete databases, i.e., relational databases that can contain unknown values in the form of labeled nu...
WEFE: The Word Embeddings Fairness Evaluation Framework.
Authors: Jorge Pérez, Felipe Bravo-Márquez, Rajesh Jayaram
Year: 2020
A More General Theory of Static Approximations for Conjunctive Queries
Authors: Pablo Barceló, Miguel Romero, Thomas Zeume
Year: 2020Source: Theory of Computing Systems
Uruguay 2019: Party system restructuring and the end of the progressive cycle
Authors: Rafael Piñeiro Rodríguez, Fernando Rosenblatt, Lihuen Nocetto
Year: 2020
A Simple and Fast Bi-Objective Search Algorithm
Authors: Jorge Baier, Carlos Hernández-Ulloa, William Yeoh et al.
Year: 2020
A Simple and Fast Bi-Objective Search Algorithm
Authors: Jorge Baier, Sven Koenig, William Yeoh et al.
Year: 2020Source: Proceedings of the International Conference on Automated Planning and Scheduling
Many interesting search problems can be formulated as bi-objective search problems, that is, search problems where two kinds of costs have to be minimized, for example, travel distance and time for tr...
Evaluating the 2014 Sugar-Sweetened Beverage Tax in Chile: Observational Evidence from Urban Areas
Authors: Jocelyn Dunstan, Andrew J. Mirelman, Ryota Nakamura et al.
Year: 2020Source: World Scientific series in global healthcare economics and public policy
An already large and growing number of countries — both rich and poor — are facing an enormous challenge to curb rising rates of obesity and diet-related ill-health, much of which affects lower so...
cBiK: A Space-Efficient Data Structure for Spatial Keyword Queries
Authors: Diego Seco, Miguel A. Martínez-Prieto, Carlos E. Sanjuan-Contreras et al.
Year: 2020
Lempel–Ziv-Like Parsing in Small Space
Authors: Gonzalo Navarro, Simon J. Puglisi, Daniel Valenzuela et al.
Year: 2020Source: Algorithmica
Semantic Search of Memes on Twitter
Authors: Benjamín Bustos, Magdalena Saldaña, Jesús Pérez-Martín
Year: 2020
Multipath Adaptive A*: Factors That Influence Performance in Goal-Directed Navigation in Unknown Terrain
Authors: Roberto Asin Acha, Jorge Baier, Carlos Hernández-Ulloa
Year: 2020
Los gobiernos socialdemócratas en Chile
Authors: Sergio Toro-Maureira, Ana Farías Antognini
Year: 2020
Political Parties, diminished subtypes, and democracy
Authors: Rafael Piñeiro Rodríguez, Fernando Rosenblatt, Juan Pablo Luna et al.
Year: 2020Source: Party Politics
There is a resurgence of interest in political parties. This resurgent interest embraces a minimalist definition of political parties, according to which any group that competes in elections and recei...
PGO: Describing Property Graphs in RDF
Authors: Renzo Angles, Harsh Thakkar, Dominik Tomaszuk
Year: 2020
Kevin LaGrandeur, James J. Hughes (eds) (2017) Surviving the Machine Age. Intelligent Technology and the Transformation of Human Work. Cham: Palgrave Macmillan. 166 pages. ISBN: 978-3-319-84584-5
Authors: Claudio Gutiérrez
Year: 2020Source: Science & Technology Studies
Mapping RDF Databases to Property Graph Databases
Authors: Renzo Angles, Harsh Thakkar, Dominik Tomaszuk
Year: 2020
Data Quality and Explainable AI
Authors: Leopoldo Bertossi, Floris Geerts
Year: 2020Source: Journal of Data and Information Quality
In this work, we provide some insights and develop some ideas, with few technical details, about the role of explanations in Data Quality in the context of data-based machine learning models (ML). In ...
Detection of Suicidal Ideation on Social Media: Multimodal, Relational, and Behavioral Analysis
Authors: Ricardo Baeza-Yates, Diego Alejandro Velazquez, Josep M. Gonfaus et al.
Year: 2020Source: Journal of Medical Internet Research
Background Suicide risk assessment usually involves an interaction between doctors and patients. However, a significant number of people with mental disorders receive no treatment for their condition ...
Computing coverage kernels under restricted settings
Authors: Javiel Rojas-Ledesma, Jérémy Barbay, Pablo Pérez-Lantero
Year: 2020
Studying incidental news: Antecedents, dynamics and implications
Authors: Sebastián Valenzuela, Neta Kligler-Vilenchik, Alfred Hermida et al.
Year: 2020Source: Journalism
In light of concerns about decreasing news use, a decline in interest in political news or even active avoidance or resistance of news in general, the idea of ‘incidental news’ has been seen as a ...
A Survey on Frameworks Used for Robustness Analysis on Interdependent Networks
Authors: Benjamín Bustos, Ivana Bachmann, Javier Bustos-Jimenez et al.
Year: 2020Source: Complexity
The analysis of network robustness tackles the problem of studying how a complex network behaves under adverse scenarios, such as failures or attacks. In particular, the analysis of interdependent net...
On Adversarial Examples for Biomedical NLP Tasks
Authors: Denis Parra, Vladimir Araujo, Carlos Aspillaga et al.
Year: 2020
An Interoperable Repository of Clinical Data
Authors: Marcelo Mendoza, Mauricio Solar, Mauricio Araya-López et al.
Year: 2020
Stable Model Semantics for Recursive SHACL
Authors: Juan Reutter, Julien Corman, Ognjen Savkovic et al.
Year: 2020
SHACL (SHape Constraint Language) is a W3C recommendation for validating graph-based data against a set of constraints (called shapes). Importantly, SHACL allows to define recursive shapes, i.e. a sha...
Bias on the web and beyond
Authors: Ricardo Baeza-Yates
Year: 2020
The Web is the most powerful communication medium and the largest public data repository that humankind has created. Its content ranges from great reference sources such as Wikipedia to ugly fake news...
Biases on Social Media Data
Authors: Ricardo Baeza-Yates
Year: 2020Source: Companion Proceedings of the The Web Conference 2018
Social media data is often used to pulse the opinion of online communities, either by predicting sentiment or stances (e.g., political), to mention just two typical use cases. However, those analysis ...
Representativeness of Abortion Legislation Debate on Twitter: A Case Study in Argentina and Chile
Authors: Ricardo Baeza-Yates, Eduardo Graells-Garrido, Mounia Lalmas
Year: 2020Source: Companion Proceedings of the The Web Conference 2018
The role of the Web in political exchange has been crucial for society. Its platforms have connected people and allowed manifestation, organization, and access to information; however, they have also ...
Screening risk of dyslexia through a web-game using language-independent content and machine learning
Authors: Ricardo Baeza-Yates, Luz Rello, Maria Rauschenberger
Year: 2020
Children with dyslexia are often diagnosed after they fail school even if dyslexia is not related to general intelligence. In this work, we present an approach for universal screening of dyslexia usin...
Trace-Relating Compiler Correctness and Secure Compilation
Authors: Eric Tanter, Carmine Abate, Roberto Blanco et al.
Year: 2020Source: Lecture notes in computer science
Abstract Compiler correctness is, in its simplest form, defined as the inclusion of the set of traces of the compiled program into the set of traces of the original program, which is equivalent to the...
DISEÑO COLABORATIVO DE UNA PROPUESTA PARA ABORDAR LA NOCIÓN DE FUNCIÓN QUE COORDINA GRÁFICOS CARTESIANOS CON MODELOS GEOMÉTRICOS DINÁMICOS
Authors: Juan Pablo Luna, Marina Andrés, Enrique Di Rico et al.
Year: 2020Source: Revista de Educación Matemática
En este artículo presentamos una secuencia de actividades -con su análisis- para abordar, en el aula de secundaria, la noción de función como herramienta modelizadora. La propuesta se centra en la...
Hybrid Hashtags: #YouKnowYoureAKiwiWhen Your Tweet Contains Māori and English
Authors: Felipe Bravo-Márquez, Te Taka Keegan, David Trye et al.
Year: 2020Source: Frontiers in Artificial Intelligence
Twitter constitutes a rich resource for investigating language contact phenomena. In this paper, we report findings from the analysis of a large-scale diachronic corpus of over one million tweets, con...
A trustworthy mechanized formalization of R
Authors: Eric Tanter, Tomás Díaz, Martin Bodin
Year: 2020Source: ACM SIGPLAN Notices
The R programming language is very popular for developing statistical software and data analysis, thanks to rich libraries, concise and expressive syntax, and support for interactive programming. Yet,...
Ranked Document Selection
Authors: Gonzalo Navarro, Sharma V. Thankachan, J. Ian Munro et al.
Year: 2020Source: Theoretical Computer Science
Recursive SPARQL for Graph Analytics
Authors: Aidan Hogan, Juan Reutter, Adrián Soto
Year: 2020
Solving Sum-of-Costs Multi-Agent Pathfinding with Answer-Set Programming
Authors: Jorge Baier, Rodrigo Gómez, Carlos Hernández
Year: 2020Source: Proceedings of the AAAI Conference on Artificial Intelligence
Solving a Multi-Agent Pathfinding (MAPF) problem involves finding non-conflicting paths that lead a number of agents to their goal location. In the sum-of-costs variant of MAPF, one is also required t...
Towards Large-scale RoI Indexing for Content-aware Data Discovery
Authors: Marcelo Mendoza, Muez Araya, Rafaela Cáceres et al.
Year: 2020
A sketch-aided retrieval approach for incomplete 3D objects
Authors: Benjamín Bustos, Tobias Schreck, Stefan Lengauer et al.
Year: 2020Source: Computers & Graphics
Social QA in non-CQA platforms
Authors: Denis Parra, Bárbara Poblete, José Miguel Herrera et al.
Year: 2020Source: Future Generation Computer Systems
Is Data Privacy The Price We Must Pay to Survive a Pandemic?
Authors: Ricardo Baeza-Yates, Cristina Pombo, Natalia González Alarcón et al.
Year: 2020Source: Inter-American Development Bank eBooks
An Interoperable Repository of Clinical Data
Authors: Marcelo Mendoza, Mauricio Araya, Mauricio Solar et al.
Year: 2020
This article shows an innovation project that aims contributing, from the ICT perspective, to necessities of health sector, specifically in interoperability and generation of information starting from...
THE STRUCTURE OF POLITICAL CONFLICT: KINSHIP NETWORKS AND POLITICAL ALIGNMENTS IN THE CIVIL WARS OF NINETEENTH-CENTURY CHILE
Authors: Naim Bro
Year: 2020
The shapley value of tuples in query answering
Authors: Leopoldo Bertossi, Benny Kimelfeld, Ester Livshits et al.
Year: 2020Source: Logical Methods in Computer Science
We investigate the application of the Shapley value to quantifying the contribution of a tuple to a query answer. The Shapley value is a widely known numerical measure in cooperative game theory and i...
On the expressiveness of Lara: A unified language for linear and relational algebra
Authors: Pablo Barceló, Nelson Higuera, Jorge Pérez et al.
Year: 2020
Learning to Detect Online Harassment on Twitter with the Transformer
Authors: Marcelo Mendoza, Margarita Bugueño
Year: 2020Source: Communications in computer and information science
The Little Prover
Authors: Eric Tanter
Year: 2020
ProNA2020 predicts protein-DNA, protein-RNA, and protein-protein binding proteins and residues from sequence
Authors: Tomás Norambuena, Jiajun Qiu, Michael Bernhofer et al.
Year: 2020
Transforming RDF Data into Property Graphs
Authors: Renzo Angles, Roberto García
Year: 2020
Compressing and randomly accessing sequences (note)
Authors: Diego Arroyuelo, Rajeev Raman, Laith Ali Abdusahib
Year: 2020
On Dynamic Succinct Graph Representations
Authors: Gonzalo Navarro
Year: 2020
Semantrix: A Compressed Semantic Matrix
Authors: Gonzalo Navarro
Year: 2020
Approximating Optimal Bidirectional Macro Schemes
Authors: Gonzalo Navarro
Year: 2020
A Family of Centrality Measures for Graph Data Based on Subgraphs
Authors: Cristian Riveros, Jorge Salas
Year: 2020
Current Challenges in Graph Databases (Invited Talk)
Authors: Juan Reutter
Year: 2020
Optimal Joins Using Compact Data Structures
Authors: Juan Reutter, Gonzalo Navarro, Javiel Rojas-Ledesma
Year: 2020
Towards Streaming Evaluation of Queries with Correlation in Complex Event Processing
Authors: Alejandro Grez, Cristian Riveros
Year: 2020
On the Expressiveness of Languages for Complex Event Recognition
Authors: Alejandro Grez, Cristian Riveros, Stijn Vansummeren et al.
Year: 2020
GSP4PDB: a web tool to visualize, search and explore protein-ligand structural patterns
Authors: Renzo Angles, Roberto García, Mauricio Arenas-Salinas et al.
Year: 2020Source: BMC Bioinformatics
Abstract Background In the field of protein engineering and biotechnology, the discovery and characterization of structural patterns is highly relevant as these patterns can give fundamental insights ...
Cryptocurrency mining games with economic discount and decreasing rewards
Authors: Marcelo Arenas, Juan Reutter, Martín Ugarte et al.
Year: 2020
Supplementary Material for the paper: Automatic Document Screening of Medical Literature Using Word and Text Embeddings in an Active Learning Setting
Authors: Denis Parra, Hans Löbel, Andrés Carvallo et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
This is the dataset used in the paper: Automatic Document Screening of Medical Literature Using Word and Text Embeddings in an Active Learning Setting. It is composed of: - Pre-trained models using ac...
Supplementary Material for the paper: Automatic Document Screening of Medical Literature Using Word and Text Embeddings in an Active Learning Setting
Authors: Denis Parra, Hans Löbel, Andrés Carvallo et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
This is the dataset used in the paper: Automatic Document Screening of Medical Literature Using Word and Text Embeddings in an Active Learning Setting. It is composed of: - Pre-trained models using ac...
Supplementary Material for the paper: Automatic Document Screening of Medical Literature Using Word and Text Embeddings in an Active Learning Setting
Authors: Denis Parra, Hans Löbel, Andrés Carvallo et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
This is the dataset used in the paper: Automatic Document Screening of Medical Literature Using Word and Text Embeddings in an Active Learning Setting. It is composed of: - Pre-trained models using ac...
Supplementary Material for the paper: Automatic Document Screening of Medical Literature Using Word and Text Embeddings in an Active Learning Setting
Authors: Denis Parra, Hans Löbel, Andrés Carvallo et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
This is the dataset used in the paper: Automatic Document Screening of Medical Literature Using Word and Text Embeddings in an Active Learning Setting. It is composed of: - Pre-trained models using ac...
Supplementary Material for the paper: Automatic Document Screening of Medical Literature Using Word and Text Embeddings in an Active Learning Setting
Authors: Denis Parra, Hans Löbel, Andrés Carvallo et al.
Year: 2020Source: Zenodo (CERN European Organization for Nuclear Research)
This is the dataset used in the paper: Automatic Document Screening of Medical Literature Using Word and Text Embeddings in an Active Learning Setting. It is composed of: - Pre-trained models using ac...
JSON: Data model and query languages
Authors: Juan Reutter, Domagoj Vrgoč, Pierre Bourhis
Year: 2020Source: Information Systems
A Polygenic Risk Score Suggests Shared Genetic Architecture of Voice Break With Early Markers of Pubertal Onset in Boys
Authors: Susana Eyheramendy, Verónica Mericq, Patricio Miranda et al.
Year: 2020Source: The Journal of Clinical Endocrinology & Metabolism
Abstract Context Voice break, as a landmark of advanced male puberty in genome-wide association studies (GWAS), has revealed that pubertal timing is a highly polygenic trait. Although voice break is e...
On Dynamic Succinct Graph Representations
Authors: Gonzalo Navarro, Guillermo de Bernardo, Susana Ladra et al.
Year: 2020
We address the problem of representing dynamic graphs using k <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> -trees. The k <sup xmlns:mml="http:...
Approximating Optimal Bidirectional Macro Schemes
Authors: Gonzalo Navarro, Luís M. S.Russo, Alexandre P. Francisco et al.
Year: 2020
Lempel-Ziv is an easy-to-compute member of a wide family of so-called macro schemes; it restricts pointers to go in one direction only. Optimal bidirectional macro schemes are NP-complete to find, but...
Semantrix: A Compressed Semantic Matrix
Authors: Gonzalo Navarro, Nieves R. Brisaboa, Antonio Fariña et al.
Year: 2020
We present a compact data structure to represent both the duration and length of homogeneous segments of trajectories from moving objects in a way that, as a data warehouse, it allows us to efficientl...
To index or not to index: Time-space trade-offs for positional ranking functions in search engines
Authors: Diego Arroyuelo, Senen González, Mauricio Marín et al.
Year: 2020Source: Information Systems
Compressing and Randomly Accessing Sequences (note)
Authors: Diego Arroyuelo, Rajeev Raman, Laith Ali Abdusahib
Year: 2020
In this paper we consider the problem of storing sequences of symbols in a compressed format, while supporting random access to the symbols without decompression. Although this is a well-studied probl...
Stability and incorporation: Toward a new concept of party system institutionalization
Authors: Rafael Piñeiro Rodríguez, Fernando Rosenblatt
Year: 2020
An integrated model for textual social media data with spatio-temporal dimensions
Authors: Bárbara Poblete, Felipe Bravo-Márquez, Juglar Díaz et al.
Year: 2020Source: Information Processing & Management
The monitoring problem for timed automata
Authors: Alejandro Grez, Cristian Riveros, Filip Mazowiecki et al.
Year: 2020
Importance of the electrolyte cation on the non-covalent interactions in the electrooxidation of 1-heptanol on gold in 0.1 M alkali metal hydroxides
Authors: Claudio Gutiérrez, Francisco J. Fernández‐Álvarez, Carolina Mascayano et al.
Year: 2020Source: Materials Chemistry and Physics
Compressed Dynamic Range Majority and Minority Data Structures
Authors: Travis Gagie, Meng He, Gonzalo Navarro
Year: 2020Source: Algorithmica
Information extraction meets the Semantic Web: A survey
Authors: Aidan Hogan, José Martínez-Rodríguez, Iván Lopez-Arévalo
Year: 2020
Descriptive Complexity for Counting Complexity Classes
Authors: Cristian Riveros, Marcelo Arenas, Martín Muñoz
Year: 2020
Descriptive Complexity for Counting Complexity Classes
Authors: Cristian Riveros, Marcelo Arenas, Martín Muñoz
Year: 2020Source: Logical Methods in Computer Science
Descriptive Complexity has been very successful in characterizing complexity classes of decision problems in terms of the properties definable in some logics. However, descriptive complexity for count...
Efficient Enumeration Algorithms for Regular Document Spanners
Authors: Cristian Riveros, Stijn Vansummeren, Fernando Florenzano et al.
Year: 2020Source: ACM Transactions on Database Systems
Regular expressions and automata models with capture variables are core tools in rule-based information extraction. These formalisms, also called regular document spanners , use regular languages to l...
Let's build Bridges, not Walls: SPARQL Querying of TinkerPop Graph Databases with Sparql-Gremlin
Authors: Renzo Angles, Harsh Thakkar, Marko Rodriguez et al.
Year: 2020
The Semantic Web: Two decades on
Authors: Aidan Hogan
Year: 2020
CompactNets: Compact Hierarchical Compositional Networks for Visual Recognition
Authors: Álvaro Soto, Hans Löbel, René Vidal
Year: 2020Source: Computer Vision and Image Understanding
Let's build Bridges, not Walls: SPARQL Querying of TinkerPop Graph Databases with Sparql-Gremlin
Authors: Renzo Angles, Jens Lehmann, Harsh Thakkar et al.
Year: 2020
This article presents sparql-gremlin, a tool to translate SPARQL queries to Gremlin pattern matching traversals. Currently, sparql-gremlin is a plugin of the Apache TinkerPop graph computing framework...
The Semantic Web: Two decades on
Authors: Aidan Hogan
Year: 2020Source: Semantic Web
More than two decades have passed since the establishment of the initial cornerstones of the Semantic Web. Since its inception, opinions have remained divided regarding the past, present and potential...
The 2(k) Neighborhoods for Grid Path Planning
Authors: Jorge Baier, Nicolás Rivera, Carlos Hernández et al.
Year: 2020Source: Journal of Artificial Intelligence Research
Grid path planning is an important problem in AI. Its understanding has been key for the development of autonomous navigation systems. An interesting and rather surprising fact about the vast literatu...
A mechanized formalization of GraphQL
Authors: Eric Tanter, Federico Olmedo, Tomás Díaz
Year: 2020
GraphQL is a novel language for specifying and querying web APIs, allowing clients to flexibly and efficiently retrieve data of interest. The GraphQL language specification is unfortunately only avail...
Fully Functional Suffix Trees and Optimal Text Searching in BWT-Runs Bounded Space
Authors: Gonzalo Navarro, Travis Gagie, Nicola Prezza
Year: 2020Source: Journal of the ACM
Indexing highly repetitive texts—such as genomic databases, software repositories and versioned text collections—has become an important problem since the turn of the millennium. A relevant compre...
Computation over compressed data
Authors: Gonzalo Navarro, Travis Gagie
Year: 2020Source: Information and Computation
Detection of Suicidal Ideation on Social Media: Multimodal, Relational, and Behavioral Analysis (Preprint)
Authors: Ricardo Baeza-Yates, Diego Alejandro Velazquez, Josep M. Gonfaus et al.
Year: 2020
<sec> <title>BACKGROUND</title> Suicide risk assessment usually involves an interaction between doctors and patients. However, a significant number of people with mental disorders receive no treatment...
From access deprivation to skill acquisition: Cluster analysis of user behavior in face of a 12-hour legal blockage of WhatsApp in Brazil.
Authors: Magdalena Saldaña, Andrés Rosenberg, Marcelo Santos
Year: 2020Source: First Monday
This study takes advantage of a forceful legal 12-hour deprivation of access to WhatsApp messaging service nationwide in Brazil on 18 December 2015. Right after the blockage, we ran a survey to captur...
Think the Vote: Information Processing, Selective Exposure to Social Media, and Support for Trump and Clinton
Authors: Magdalena Saldaña, Thomas J. Johnson, Barbara K. Kaye
Year: 2020
Towards a Definitive Measure of Repetitiveness
Authors: Gonzalo Navarro, Nicola Prezza, Tomasz Kociumaka
Year: 2020Source: Lecture notes in computer science
Practical Random Access to SLP-Compressed Texts
Authors: Gonzalo Navarro, Travis Gagie, Giovanni Manzini et al.
Year: 2020Source: Lecture notes in computer science
Space/time-efficient RDF stores based on circular suffix sorting
Authors: Gonzalo Navarro, Guillermo de Bernardo, Nieves R. Brisaboa et al.
Year: 2020Source: arXiv (Cornell University)
In recent years, RDF has gained popularity as a format for the standardized publication and exchange of information in the Web of Data. In this paper we introduce RDFCSA, a data structure that is able...
Contextual Pattern Matching
Authors: Gonzalo Navarro
Year: 2020Source: Lecture notes in computer science
Indexing Highly Repetitive String Collections
Authors: Gonzalo Navarro
Year: 2020Source: arXiv (Cornell University)
Two decades ago, a breakthrough in indexing string collections made it possible to represent them within their compressed space while at the same time offering indexed search functionalities. As this ...
Spanish pre-trained BERT model and evaluation data
Authors: Jorge Pérez, José Cañete, Gabriel Chaperon et al.
Year: 2020
Translating navigation instructions in natural language to a high-level plan for behavioral robot navigation
Authors: Álvaro Soto, Juan Carlos Niebles, Xiaoxue Zang et al.
Year: 2020
Plan estratégico de la logística urban-portuaria. Mejores ciudades portuarias en elÁrea Metropolitana de Concepción.
Authors: Sergio Toro-Maureira, Mabel Alarcón, Violeta Montero et al.
Year: 2020
Inspecting state of the art performance and NLP metrics in image-based medical report generation
Authors: Pablo Messina, Cecilia Besa, Sergio Uribe et al.
Year: 2020Source: arXiv (Cornell University)
Several deep learning architectures have been proposed over the last years to deal with the problem of generating a written report given an imaging exam as input. Most works evaluate the generated rep...
Neural language models for text classification in evidence-based medicine
Authors: Denis Parra, Andrés Carvallo, Gabriel Rada et al.
Year: 2020Source: arXiv (Cornell University)
The COVID-19 has brought about a significant challenge to the whole of humanity, but with a special burden upon the medical community. Clinicians must keep updated continuously about symptoms, diagnos...
A Survey on Deep Learning and Explainability for Automatic Report Generation from Medical Images
Authors: Denis Parra, Pablo Messina, Álvaro Soto et al.
Year: 2020Source: arXiv (Cornell University)
Every year physicians face an increasing demand of image-based diagnosis from patients, a problem that can be addressed with recent artificial intelligence methods. In this context, we survey works in...
Cryptocurrency Mining Games with Economic Discount and Decreasing Rewards.
Authors: Marcelo Arenas, Juan Reutter, Domagoj Vrgoč et al.
Year: 2020Source: Symposium on Theoretical Aspects of Computer Science
In the consensus protocols used in most cryptocurrencies, participants called miners must find valid blocks of transactions and append them to a shared tree-like data structure. Ideally, the rules of ...
Review of “The Little Prover” by Daniel P. Friedman and Carl Eastlund, MIT Press, 2015
Authors: Eric Tanter
Year: 2020Source: Journal of Functional Programming
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
Contextual Linear Types for Differential Privacy
Authors: Matías Toro, Eric Tanter, Federico Olmedo et al.
Year: 2020Source: arXiv (Cornell University)
Language support for differentially-private programming is both crucial and delicate. While elaborate program logics can be very expressive, type-system based approaches using linear types tend to be ...
DCC-Uchile at SemEval-2020 Task 1: Temporal Referencing Word Embeddings
Authors: Felipe Bravo-Márquez, Frank D. Zamora-Reina
Year: 2020
We present a system for the task of unsupervised lexical change detection: given a target word and two corpora spanning different periods of time, automatically detects whether the word has lost or ga...
First-Order Rewritability of Frontier-Guarded Ontology-Mediated Queries
Authors: Andreas Pieris, Carsten Lutz, Andréas Pieris et al.
Year: 2020
We focus on ontology-mediated queries (OMQs) based on (frontier-)guarded existential rules and (unions of) conjunctive queries, and we investigate the problem of FO-rewritability, i.e., whether an OMQ...
Anonymity and Asynchronicity as Key Design Dimensions for the Reciprocity of Online Democratic Deliberation
Authors: Claudio Gutiérrez, Leandro De Brasi
Year: 2020Source: International Journal of Applied Philosophy
The aim of this paper is to identify, given certain democratic normative standards regarding deliberation, some pros as well as cons of possible online deliberation designs due to variations in two ke...
An ASP-Based Approach to Counterfactual Explanations for Classification
Authors: Leopoldo Bertossi
Year: 2020Source: arXiv (Cornell University)
We propose answer-set programs that specify and compute counterfactual interventions as a basis for causality-based explanations to decisions produced by classification models. They can be applied wit...
The Tractability of SHAP-Score-Based Explanations over Deterministic and Decomposable Boolean Circuits
Authors: Pablo Barceló, Marcelo Arenas, Mikaël Monet
Year: 2020Source: arXiv (Cornell University)
Scores based on Shapley values are widely used for providing explanations to classification results over machine learning models. A prime example of this is the influential SHAP-score, a version of th...
Web of Data
Authors: Aidan Hogan
Year: 2020Source: Springer eBooks
Recursive SPARQL for Graph Analytics
Authors: Aidan Hogan, Juan Reutter, Adrián Soto
Year: 2020Source: arXiv (Cornell University)
Work on knowledge graphs and graph-based data management often focus either on declarative graph query languages or on frameworks for graph analytics, where there has been little work in trying to com...
Storage, Indexing, Query Processing, and Benchmarking in Centralized and Distributed RDF Engines: A Survey
Authors: Aidan Hogan, Axel-Cyrille Ngonga Ngomo, Bin Yao et al.
Year: 2020Source: arXiv (Cornell University)
The recent advancements of the Semantic Web and Linked Data have changed the working of the traditional web. There is significant adoption of the Resource Description Framework (RDF) format for saving...
Semantic Search of Memes on Twitter
Authors: Benjamín Bustos, Magdalena Saldaña, Jesus Perez-Martin
Year: 2020Source: arXiv (Cornell University)
Memes are becoming a useful source of data for analyzing behavior on social media. However, a problem to tackle is how to correctly identify a meme. As the number of memes published every day on socia...
Efficient GPU Thread Mapping on Embedded 2D Fractals
Authors: Benjamín Bustos, Raimundo Vega, Felipe A. Quezada et al.
Year: 2020Source: arXiv (Cornell University)
This work proposes a new approach for mapping GPU threads onto a family of discrete embedded 2D fractals. A block-space map $\lambda: \mathbb{Z}_{\mathbb{E}}^{2} \mapsto \mathbb{Z}_{\mathbb{F}}^{2}$ i...
The monitoring problem for timed automata
Authors: Cristian Riveros, Alejandro Grez, Filip Mazowiecki et al.
Year: 2020Source: arXiv (Cornell University)
We study a variant of the classical membership problem in automata theory, which consists of deciding whether a given input word is accepted by a given automaton. We do so under a different perspectiv...
A Family of Centrality Measures for Graph Data Based on Subgraphs
Authors: Cristian Riveros, Jorge Salas
Year: 2020Source: International Conference on Database Theory
We present the theoretical foundations of a new approach in centrality measures for graph data. The main principle of our approach is very simple: the more around a vertex, the more central it is in...
Streaming enumeration on nested documents
Authors: Cristian Riveros, Martı́n Muñoz
Year: 2020Source: arXiv (Cornell University)
Some of the most relevant document schemas used online, such as XML and JSON, have a nested format. In the last decade, the task of extracting data from nested documents over streams has become especi...
Ranked enumeration of MSO logic on words
Authors: Cristian Riveros, Alejandro Grez, Pierre Bourhis et al.
Year: 2020Source: arXiv (Cornell University)
In the last years, enumeration algorithms with bounded delay have attracted a lot of attention for several data management tasks. Given a query and the data, the task is to preprocess the data and the...
Expressive power of linear algebra query languages
Authors: Cristian Riveros, Domagoj Vrgoč, Thomas Muñoz et al.
Year: 2020Source: arXiv (Cornell University)
Linear algebra algorithms often require some sort of iteration or recursion as is illustrated by standard algorithms for Gaussian elimination, matrix inversion, and transitive closure. A key character...
When is Approximate Counting for Conjunctive Queries Tractable?
Authors: Cristian Riveros, Marcelo Arenas, Rajesh Jayaram et al.
Year: 2020Source: arXiv (Cornell University)
Conjunctive queries are one of the most common class of queries used in database systems, and the best studied in the literature. A seminal result of Grohe, Schwentick, and Segoufin (STOC 2001) demons...
On Adversarial Examples for Biomedical NLP Tasks
Authors: Denis Parra, Andrés Carvallo, Vladimir Araujo et al.
Year: 2020Source: arXiv (Cornell University)
The success of pre-trained word embeddings has motivated its use in tasks in the biomedical domain. The BERT language model has shown remarkable results on standard performance metrics in tasks such a...
CuratorNet: Visually-aware Recommendation of Art Images
Authors: Denis Parra, Pablo Messina, Manuel Cartagena et al.
Year: 2020Source: arXiv (Cornell University)
Although there are several visually-aware recommendation models in domains like fashion or even movies, the art domain lacks thesame level of research attention, despite the recent growth of the onlin...
Scalable Recommendation of Wikipedia Articles to Editors Using Representation Learning
Authors: Denis Parra, Diego Sáez-Trumper, Oleksii Moskalenko
Year: 2020Source: arXiv (Cornell University)
Wikipedia is edited by volunteer editors around the world. Considering the large amount of existing content (e.g. over 5M articles in English Wikipedia), deciding what to edit next can be difficult, b...
"IMFD IMPRESEE at TRECVID 2020: Description Generation by Visual-Syntactic Embedding"
Authors: Jorge Pérez, Benjamín Bustos, Juan Manuel Barrios et al.
Year: 2020
Extending General Compact Querieable Representations to GIS Applications
Authors: Nieves Brisaboa, Gonzalo Navarro, Guillermo de Bernardo et al.
Year: 2020Source: Information Sciences
PFP Data Structures
Authors: Gonzalo Navarro, Travis Gagie, Giovanni Manzini et al.
Year: 2020Source: arXiv (Cornell University)
Prefix-free parsing (PFP) was introduced by Boucher et al. (2019) as a preprocessing step to ease the computation of Burrows-Wheeler Transforms (BWTs) of genomic databases. Given a string $S$, it prod...
Grammar Compression By Induced Suffix Sorting
Authors: Daniel S. N. Nunes, Gonzalo Navarro, Simon Gog et al.
Year: 2020Source: arXiv (Cornell University)
A grammar compression algorithm, called GCIS, is introduced in this work. GCIS is based on the induced suffix sorting algorithm SAIS, presented by Nong et al. in 2009. The proposed solution builds on ...
The Chilean Waiting List Corpus: a new resource for clinical Named Entity Recognition in Spanish
Authors: Jocelyn Dunstan, Fabián Villena, Pablo Báez et al.
Year: 2020
In this work we describe the Waiting List Corpus consisting of de-identified referrals for several specialty consultations from the waiting list in Chilean public hospitals. A subset of 900 referrals ...
On the Construction of Multilingual Corpora for Clinical Text Mining
Authors: Jocelyn Dunstan, Fabián Villena, Matthias Ganzinger et al.
Year: 2020Source: Studies in health technology and informatics
The amount of digital data derived from healthcare processes have increased tremendously in the last years. This applies especially to unstructured data, which are often hard to analyze due to the lac...
For Learners, with Learners: Identifying Indicators for an Academic Advising Dashboard for Students
Authors: Jorge Baier, Isabel Hilliger, Mar Pérez‐Sanagustín et al.
Year: 2020Source: Lecture notes in computer science
Multipath Adaptive A*: Factors That Influence Performance in Goal-Directed Navigation in Unknown Terrain
Authors: Jorge Baier, Carlos Hernández, Roberto Asín‐Achá
Year: 2020Source: IEEE Access
Incremental heuristic search algorithms are a class of heuristic search algorithms applicable to the problem of goal-directed navigation. D* and D*Lite are among the most well-known algorithms for thi...
codebook of_returning_homestyles_ATL.pdf
Authors: Sergio Toro, Juan Pablo Luna, Daniel Alcatruz
Year: 2020Source: Harvard Dataverse
codebook
paper_deployment_V26-04-2020.do
Authors: Sergio Toro, Juan Pablo Luna, Daniel Alcatruz
Year: 2020Source: Harvard Dataverse
dofile
Replication Data for: Returning Homestyles to congressional politics
Authors: Sergio Toro, Juan Pablo Luna, Daniel Alcatruz
Year: 2020Source: Harvard Dataverse
This dataset contains classification the activities of 50 incumbent congressmembers in 2016 who were elected under the old electoral formula and ran for re-election in the post-reform race of 2017. Th...
df_deployment_deputies.tab
Authors: Sergio Toro, Juan Pablo Luna, Daniel Alcatruz
Year: 2020Source: Harvard Dataverse
:unav
The Shapley Value of Tuples in Query Answering.
Authors: Leopoldo Bertossi, Moshe Sebag, Ester Livshits et al.
Year: 2020Source: International Conference on Database Theory
We investigate the application of the Shapley value to quantifying the contribution of a tuple to a query answer. The Shapley value is a widely known numerical measure in cooperative game theory and i...
Score-Based Explanations in Data Management and Machine Learning
Authors: Leopoldo Bertossi
Year: 2020Source: arXiv (Cornell University)
We describe some approaches to explanations for observed outcomes in data management and machine learning. They are based on the assignment of numerical scores to predefined and potentially relevant i...
Declarative Approaches to Counterfactual Explanations for Classification
Authors: Leopoldo Bertossi
Year: 2020Source: arXiv (Cornell University)
We propose answer-set programs that specify and compute counterfactual interventions on entities that are input on a classification model. In relation to the outcome of the model, the resulting counte...
Causality-based Explanation of Classification Outcomes
Authors: Leopoldo Bertossi, Zografoula Vagena, Maximilian Schleich et al.
Year: 2020Source: arXiv (Cornell University)
We propose a simple definition of an explanation for the outcome of a classifier based on concepts from causality. We compare it with previously proposed notions of explanation, and study their comple...
A grammar compressor for collections of reads with applications to the construction of the BWT
Authors: Gonzalo Navarro, Diego Díaz-Domínguez
Year: 2020Source: arXiv (Cornell University)
We describe a grammar for DNA sequencing reads from which we can compute the BWT directly. Our motivation is to perform in succinct space genomic analyses that require complex string queries not yet s...
PHONI: Streamed Matching Statistics with Multi-Genome References
Authors: Gonzalo Navarro, Travis Gagie, Dominik Köppl et al.
Year: 2020Source: arXiv (Cornell University)
Computing the matching statistics of patterns with respect to a text is a fundamental task in bioinformatics, but a formidable one when the text is a highly compressed genomic database. Bannai et al. ...
Contextual Pattern Matching
Authors: Gonzalo Navarro
Year: 2020Source: arXiv (Cornell University)
The research on indexing repetitive string collections has focused on the same search problems used for regular string collections, though they can make little sense in this scenario. For example, the...
Approximating Optimal Bidirectional Macro Schemes
Authors: Gonzalo Navarro, Luís M. S.Russo, Alexandre P. Francisco et al.
Year: 2020Source: arXiv (Cornell University)
Lempel-Ziv is an easy-to-compute member of a wide family of so-called macro schemes; it restricts pointers to go in one direction only. Optimal bidirectional macro schemes are NP-complete to find, but...
Semantrix: A Compressed Semantic Matrix
Authors: Gonzalo Navarro, Nieves R. Brisaboa, Antonio Fariña et al.
Year: 2020Source: arXiv (Cornell University)
We present a compact data structure to represent both the duration and length of homogeneous segments of trajectories from moving objects in a way that, as a data warehouse, it allows us to efficientl...
Grammar-Compressed Indexes with Logarithmic Search Time
Authors: Gonzalo Navarro, Francisco Claude, Alejandro Gustavo Vigo Pacheco
Year: 2020Source: arXiv (Cornell University)
Let a text $T[1..n]$ be the only string generated by a context-free grammar with $g$ (terminal and nonterminal) symbols, and of size $G$ (measured as the sum of the lengths of the right-hand sides of ...
What Kind of Content Are You Prone to Tweet? Multi-topic Preference Model for Tweeters
Authors: Ricardo Baeza-Yates, Lorena Recalde
Year: 2020Source: Communications in computer and information science
Pre-indexing Pruning Strategies
Authors: Ricardo Baeza-Yates, B. Barla Cambazoğlu, Soner Altin
Year: 2020Source: Lecture notes in computer science
Enhanced Word Embeddings for Anorexia Nervosa Detection on Social Media
Authors: Ricardo Baeza-Yates, Diana Ramírez‐Cifuentes, Ana Freire et al.
Year: 2020Source: Lecture notes in computer science
Anorexia Nervosa (AN) is a serious mental disorder that has been proved to be traceable on social media through the analysis of users' written posts. Here we present an approach to generate word embed...
Adaptive Community Search in Dynamic Networks
Authors: Ricardo Baeza-Yates, Francesco Bonchi, Ioanna Tsalouchidou
Year: 2020Source: arXiv (Cornell University)
Community search is a well-studied problem which, given a static graph and a query set of vertices, requires to find a cohesive (or dense) subgraph containing the query vertices. In this paper we stud...
Análisis de la secuencia de un aislamiento de coronavirus Covid-19
Authors: Sebastián Valenzuela, Daniela Costa
Year: 2020Source: OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)
The Complexity of Counting Problems over Incomplete Databases
Authors: Pablo Barceló, Marcelo Arenas, Mikaël Monet
Year: 2020Source: arXiv (Cornell University)
We study the complexity of various fundamental counting problems that arise in the context of incomplete databases, i.e., relational databases that can contain unknown values in the form of labeled nu...
Model Interpretability through the Lens of Computational Complexity
Authors: Pablo Barceló, Mikaël Monet, Bernardo Subercaseaux et al.
Year: 2020Source: arXiv (Cornell University)
In spite of several claims stating that some models are more interpretable than others -- e.g., "linear models are more interpretable than deep neural networks" -- we still lack a principled notion of...
First-Order Rewritability of Frontier-Guarded Ontology-Mediated Queries
Authors: Pablo Barceló, Andréas Pieris, Carsten Lutz et al.
Year: 2020Source: arXiv (Cornell University)
We focus on ontology-mediated queries (OMQs) based on (frontier-)guarded existential rules and (unions of) conjunctive queries, and we investigate the problem of FO-rewritability, i.e., whether an OMQ...
When is Ontology-Mediated Querying Efficient?
Authors: Pablo Barceló, Andréas Pieris, Carsten Lutz et al.
Year: 2020Source: arXiv (Cornell University)
In ontology-mediated querying, description logic (DL) ontologies are used to enrich incomplete data with domain knowledge which results in more complete answers to queries. However, the evaluation of ...
Mapping RDF Databases to Property Graph Databases
Authors: Renzo Angles, Dominik Tomaszuk, Harsh Thakkar
Year: 2020Source: IEEE Access
RDF triplestores and property graph databases are two approaches for data management which are based on modeling, storing, and querying graph-like data. In spite of such common principles, they presen...
The LDBC Social Network Benchmark
Authors: Renzo Angles, Marcus Paradies, Peter Boncz et al.
Year: 2020Source: arXiv (Cornell University)
The Linked Data Benchmark Council's Social Network Benchmark (LDBC SNB) is an effort intended to test various functionalities of systems used for graph-like data management. For this, LDBC SNB uses th...
R<sup>3</sup>MAT: A Rapid and Robust Graph Generator
Authors: Renzo Angles, Roberto García, Rodrígo Paredes
Year: 2020Source: IEEE Access
One of the main problems when developing graph-based applications is the availability of large and representative datasets.The lack of real graphs has motivated the development of software tools for g...
PGO: Describing Property Graphs in RDF
Authors: Renzo Angles, Dominik Tomaszuk, Harsh Thakkar
Year: 2020Source: IEEE Access
RDF and Property Graphs are data models that are being used to represent Knowledge Graphs. The definition of methods to transform RDF data into Property graph data is fundamental to allow interoperabi...
Transforming RDF Data into Property Graphs
Authors: Renzo Angles, Roberto García
Year: 2020Source: IEEE Latin America Transactions
RDF databases and graph databases are two approaches of data management which are based on modeling, storing and querying data following a graph structure. RDF databases are based on a single graph da...
rdf2pg experimental datasets
Authors: Renzo Angles, Dominik Tomaszuk, Harsh Thakkar
Year: 2020Source: Figshare
RDF Datasets used in the rdf2pg paper, and the corresponding YARS-PG files.
rdf2pg experimental datasets
Authors: Renzo Angles, Dominik Tomaszuk, Harsh Thakkar
Year: 2020Source: Figshare
RDF Datasets used in the rdf2pg paper, and the corresponding YARS-PG files.
rdf2pg experimental datasets
Authors: Renzo Angles
Year: 2020Source: Figshare
RDF Datasets used in the rdf2pg paper, and the corresponding YARS-PG files.
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