IIR 2025
Italian Information Retrieval Workshop 2025

Table of Contents

• Preface I-III
  Summary: There were 27 papers submitted for peer-review to this workshop. All 27 papers were accepted, 3 as original research papers (1 full paper and 2 short papers) and 24 as extended abstracts. Out of these, 2 extended abstracts are not included in this volume due to authors' decision.

Keynotes

• Learned Sparse Representations of Text: A Story of Indexing and Retrieval 1
  Franco Maria Nardini
• "This Will All Make Sense When I'm Older": Goals, Gaps, and the Road Ahead for Child-Aware IR 2
  Maria Soledad Pera

Original Research Papers

• A Grading Methodology for E-commerce Reviews based on a Mixed Lexical-semantic Approach 3-6
  Giuseppe Scarpi , Amir Khorrami Chokami , Diego Reforgiato
• Empowered or Lost? How Search Tools and Social Networks Shape Teen Learning in an AI World 7-19
  Emiliana Murgia , Monica Landoni , Theo Huibers , Maria Soledad Pera
• Leveraging LLM-Powered Multi-Agent Systems to Enhance Customer Experience in Complex Product Domains 20-26
  Marco Valentini , Antonio Ferrara , Tommaso Di Noia , Giuseppe Illuzzi , Pierangelo Colacicco

Extended Abstracts

• A Dataset for Joint Conversational Search and Recommendation 27-32
  Marco Alessio , Simone Merlo , Tommaso Di Noia Guglielmo Faggioli , Marco Ferrante , Nicola Ferro , Cristina Ioana Muntean , Franco Maria Nardini , Fedelucio Narducci , Raffaele Perego , Giuseppe Santucci , Nicola Viterbo
• Beyond Homogeneous Users: Simulating Diverse User Personas for Conversational Recommendation Datasets 32-38
  Alessandro Francesco Maria Martina , Alessandro Petruzzelli , Cataldo Musto , Marco de Gemmis , Pasquale Lops , Giovanni Semeraro
• Beyond Relevance: Quantifying Distraction of Irrelevant Passages in RAG 39-44
  Chen Amiraz , Florin Cuconasu , Simone Filice , Zohar Karnin
• Caser+ and CosRec+: Closing the Gap Between CNNs and Attention Models in SRS 45-50
  Federico Siciliano , Antonio Purificato , Filippo Betello , Nicola Tonellotto , Fabrizio Silvestri
• Comparing LLMs and Traditional Privacy Measures to Evaluate Query Obfuscation Approaches 51-58
  Francesco De Faveri , Guglielmo Faggioli , Nicola Ferro
• Comparing Recommendation Losses under Negative Sampling 59-64
  Giulia Di Teodoro , Federico Siciliano , Nicola Tonellotto , Fabrizio Silvestri
• Counterfactual Dimension Importance Estimation (CoDIME) for Dense Information Retrieval 65-70
  Guglielmo Faggioli , Nicola Ferro , Raffaele Perego , Nicola Tonellotto
• Diffusion Models for Recommendation: Reproducibility and Conceptual Mismatch 71-77
  Michael Benigni , Maurizio Ferrari Dacrema , Dietmar Jannach
• Eclipse: Leveraging Pseudo-Irrelevance for Dimension Importance Estimation 78-83
  Giulio D'Erasmo , Giovanni Trappolini , Nicola Tonellotto , Fabrizio Silvestri
• Effective and Transparent Course Recommendation through Causal Reasoning with Language Models 84-87
  Neda Afreen , Ludovico Boratto , Gianni Fenu , Mirko Marras , Alessandro Soccol
• Enhancing Ground Truth Creation for IR Through Web-Based Collaborative Annotation 88-93
  Ornella Irrera , Stefano Marchesin , Gianmaria Silvello
• Graph Augmentation with LLMs for Knowledge-Aware Recommender Systems 94-100
  Giuseppe Spillo , Cataldo Musto , Matteo Mannavola , Marco de Gemmis , Pasquale Lops , Giovanni Semeraro
• Investigating Mixture of Experts in Dense Retrieval 101-107
  Effrosyni Sokli , Pranav Kasela , Georgios Peikos , Gabriella Pasi
• Investigating Task Arithmetic for Zero-Shot Information Retrieval 108-116
  Marco Braga , Pranav Kasela , Alessandro Raganato , Gabriella Pasi
• Knowledge is Power: Boosting Recommender Systems by Infusing LLMs with Domain Expertise 117-122
  Alessandro Petruzzelli , Cataldo Musto , Marco de Gemmis , Pasquale Lops , Giovanni Semeraro
• Lean and Green: Computational Efficiency and Nudging for Sustainable Fashion Recommendation 123-128
  Angelo Geninatti Cossatin
• Less Data, More Questions: Fairness and Accuracy Under Data Minimization in Recommender Systems 129-135
  Salvatore Bufi , Vincenzo Paparella , Vito Walter Anelli , Tommaso Di Noia
• MDCU: A Multi-Dimensional Cumulative Utility Metric for Information Retrieval 136-141
  Francesco De Faveri , Guglielmo Faggioli , Nicola Ferro , Kalervo Järvelin
• Neural Web Crawling 142-147
  Francesca Pezzuti , Sean MacAvaney , Nicola Tonellotto
• PARK: Personalized Academic Retrieval with Knowledge-graphs 148-153
  Pranav Kasela , Gabriella Pasi , Raffaele Perego
• Siren Federate: Bridging Document, Relational, and Graph Models for Exploratory Graph Analysis 154-155
  Georgeta Bordea , Stéphane Campinas , Matteo Catena , Renaud Delbru
• The KIMERA Infrastructure: Shifting from Evaluation-as-a-Service to Evaluation-in-the-Cloud 156-163
  Andrea Pasin , Nicola Ferro