3 papers
cs.CL2026
BERTilda: Explainable Topic Lifecycle Tracking with Split/Merge Detection via Similarity-and-Flow Temporal Graphs
Cláudia Oliveira, Álvaro Figueira
Longitudinal text streams exhibit topic birth and death, but also discrete structural reorganizations in which themes split into subtopics or merge into broader narratives. Many dy…
cs.SI2025
Modeling Political Discourse with Sentence-BERT and BERTopic
Margarida Mendonca, Alvaro Figueira
Social media has reshaped political discourse, offering politicians a platform for direct engagement while reinforcing polarization and ideological divides. This study introduces a…
cs.IR2024
Rethinking negative sampling in content-based news recommendation
Miguel Ãngelo Rebelo, João Vinagre, Ivo Pereira +1
News recommender systems are hindered by the brief lifespan of articles, as they undergo rapid relevance decay. Recent studies have demonstrated the potential of content-based neur…