The Research Group on Knowledge Management and Information Retrieval studies, designs, and evaluates methods aimed at solving problems within the areas of natural language processing, machine learning, and information retrieval. The goal is to develop intelligent tools to facilitate the extraction, refinement, and organization of knowledge across different domains. The main research areas include: contextualized information retrieval, information extraction, causal learning, and individualized inference.
Team
Head: Ana G. Maguitman
Researchers
- Rocío L. Cecchini – ICIC (UNS-CONICET)
- Carlos I. Chesñevar – ICIC (UNS-CONICET)
- Fernando Delbianco – INMABB (UNS-CONICET)
- Elsa C. Estevez – ICIC (UNS-CONICET)
- Carlos M. Lorenzetti – ICIC (UNS-CONICET)
- Ana G. Maguitman – ICIC (UNS-CONICET)
- Ignacio Ponzoni – ICIC (UNS-CONICET)
- Axel J. Soto – ICIC (UNS-CONICET)
- Fernando Tohmé – INMABB (UNS-CONICET)
Collaborators
- Cecilia Baggio – ICIC (UNS-CONICET)
- Gabriela A. Diaz – ICIC (UNS-CONICET)
Doctoral Fellows
- Lázaro Gibert García – ICIC (UNS-CONICET)
- María Arce Pistone – ICIC (UNS-CONICET)
- Martina Cesca – ICIC (UNS-CONICET)
- Laureano Ramirez – ICIC (UNS-CONICET)
Former Members
- Cristian Briguez
- Rocío Hubert
- Mariano Maisonnave
- Ana Lucía Nicolini
- Eduardo Xamena
Selected publications
2026
- Article Modeling polarization in public opinion through LLM-synthesized arguments and stance trees PeerJ Computer Science DOI:10.7717/peerj-cs.3906
2025
- Article A methodological approach for inferring causal relationships from opinions and news-derived events with an application to climate change PeerJ Computer Science DOI:10.7717/peerj-cs.2964
- Chapter Assessing Disease Comorbidity in Hospital Patients through Machine Learning and Network Analysis Techniques Intelligent systems reference library DOI:10.1007/978-3-031-95044-5_3
- Misc Potenciando la e-deliberación inclusiva mediante árboles de posturas y árboles dialécticos El Servicio de Difusión de la Creación Intelectual (National University of La Plata)
- Chapter Harnessing Artificial Intelligence and Visual Analytics for Modeling Government-Citizen Interaction in Argentinean Institutions Public administration and information technology DOI:10.1007/978-3-031-87623-3_9
2024
- Article Learning causality structures from electricity demand data Energy Systems DOI:10.1007/s12667-024-00684-6
- Article Polviz: Assessing Opinion Polarization in Social Media through Visual Analytics and Argumentation Proceedings of the 17th International Conference on Theory and Practice of Electronic Governance DOI:10.1145/3680127.3680212
2023
- Article Multi-objective genetic programming strategies for topic-based search with a focus on diversity and global recall PeerJ Computer Science DOI:10.7717/peerj-cs.1710
- Article Assessing causality among topics and sentiments: The case of the G20 discussion on Twitter Journal of Information Science DOI:10.1177/01655515231160034
- Chapter QuOTeS: Query-Oriented Technical Summarization Lecture notes in computer science DOI:10.1007/978-3-031-41682-8_7
- Article TwiSP: a framework for exploring polarized issues in Twitter DOI:10.1145/3614321.3614324
2022
- Article Post-OCR Document Correction with Large Ensembles of Character Sequence-to-Sequence Models Proceedings of the AAAI Conference on Artificial Intelligence DOI:10.1609/aaai.v36i10.21369
- Article Causal graph extraction from news: a comparative study of time-series causality learning techniques PeerJ Computer Science DOI:10.7717/peerj-cs.1066
- Article Detecting ongoing events using contextual word and sentence embeddings Expert Systems with Applications DOI:10.1016/j.eswa.2022.118257
- Article Stance Trees: A Novel Approach for Assessing Politically Polarized Issues in Twitter DOI:10.1145/3560107.3560296
- Chapter Computational Argumentation for Supporting Learning Processes: Applications and Challenges Learning and analytics in intelligent systems DOI:10.1007/978-3-031-04662-9_9
2021
- Article Structural analysis of relevance propagation models Knowledge-Based Systems DOI:10.1016/j.knosys.2021.107563
- Preprint Post-OCR Document Correction with large Ensembles of Character Sequence-to-Sequence Models arXiv (Cornell University) DOI:10.48550/arxiv.2109.06264
- Preprint Post-OCR Document Correction with large Ensembles of Character Sequence Models. arXiv (Cornell University)
2020
- Article A first approach towards integrating computational argumentation in cognitive cities DOI:10.1145/3428502.3428506
- Article Assessing Causality Structures learned from Digital Text Media DOI:10.1145/3395027.3419594
- Article Language modeling tools for massive historical OCR post-processing El Servicio de Difusión de la Creación Intelectual (National University of La Plata)
- Article A supervised term-weighting technique for topic-based retrieval arXiv (Cornell University)
- Article Analyzing and Visualizing Government-Citizen Interactions on Twitter to Support Public Policy-making Digital Government Research and Practice DOI:10.1145/3360001
2019
- Article A Flexible Supervised Term-Weighting Technique and its Application to Variable Extraction and Information Retrieval INTELIGENCIA ARTIFICIAL DOI:10.4114/intartif.vol22iss63pp61-80
- Article Multi-Objective GP Strategies for Topical Search Integrating Wikipedia Concepts Proceedings of the ACM Symposium on Document Engineering 2019 DOI:10.1145/3342558.3345402
- Article Intelligent query processing in P2P networks: Semantic issues and routing algorithms Computer Science and Information Systems DOI:10.2298/csis180411002n
2018
- Article Searching in the Context of a Task: A Review of Methods and Tools CLEI electronic journal DOI:10.19153/cleiej.21.1.1
- Article A Supervised Term-Weighting Method and its Application to Variable Extraction from Digital Media El Servicio de Difusión de la Creación Intelectual (National University of La Plata)
2017
- Article Topic relevance and diversity in information retrieval from large datasets: A multi-objective evolutionary algorithm approach Applied Soft Computing DOI:10.1016/j.asoc.2017.11.016
- Article A Structural Analysis of topic ontologies Information Sciences DOI:10.1016/j.ins.2017.08.081
2016
- Article SciELO suggester: An intelligent support tool for cataloging library resources Library & Information Science Research DOI:10.1016/j.lisr.2016.01.001
- Article Mining for Topics to Suggest Knowledge Model Extensions ACM Transactions on Knowledge Discovery from Data DOI:10.1145/2997657
- Article An Entropy-Based Approach for Preserving Diversity in Evolutionary Topical Search El Servicio de Difusión de la Creación Intelectual (National University of La Plata)
- Article Software platform for the statistical validation of structural partitioning methods Computers & Chemical Engineering DOI:10.1016/j.compchemeng.2016.01.007
- Article Intelligent algorithms for improving communication patterns in thematic P2P search Information Processing & Management DOI:10.1016/j.ipm.2016.12.001
2015
- Article Integrating argumentation and sentiment analysis for mining opinions from Twitter AI Communications DOI:10.3233/aic-140627
- Chapter ArgP2P: An Argumentative Approach for Intelligent Query Routing in P2P Networks Lecture notes in computer science DOI:10.1007/978-3-319-28460-6_12
2014
- Article Argument-based mixed recommenders and their application to movie suggestion Expert Systems with Applications DOI:10.1016/j.eswa.2014.03.046
- Chapter Modeling Video Activity with Dynamic Phrases and Its Application to Action Recognition in Tennis Videos Lecture notes in computer science DOI:10.1007/978-3-319-12568-8_110
- Article Empowering citizens through opinion mining from twitter-based arguments DOI:10.1145/2691195.2691282
2013
- Article A THEORETICAL FRAMEWORK FOR TRUST-BASED NEWS RECOMMENDER SYSTEMS AND ITS IMPLEMENTATION USING DEFEASIBLE ARGUMENTATION International Journal of Artificial Intelligence Tools DOI:10.1142/s0218213013500218
- Chapter A First Approach to Mining Opinions as Multisets through Argumentation Lecture notes in computer science DOI:10.1007/978-3-642-39860-5_15
- Article A study of relevance propagation in large topic ontologies Journal of the American Society for Information Science and Technology DOI:10.1002/asi.22925
2012
- Article An Argument-based Approach to Mining Opinions from Twitter.
- Article Integrating argumentation technologies and context-based search for intelligent processing of citizens' opinion in social media DOI:10.1145/2463728.2463762
- Chapter Towards an Argument-based Music Recommender System Frontiers in artificial intelligence and applications DOI:10.3233/978-1-61499-111-3-83
- Article Empowering an E-Government Platform Through Twitter-Based Arguments Redalyc (Universidad Autónoma del Estado de México)
2011
- Article A Semantic Framework for Evaluating Topical Search Methods CLEI electronic journal DOI:10.19153/cleiej.14.1.2