All Stories

  1. Leveraging Topic Specificity and Social Relationships for Expert Finding in Community Question Answering Platforms

    Article • ACM Transactions on Information Systems, February 2026, ACM (Association for Computing Machinery)

    Raffaele Perego

  2. A Spatially-Grounded Conversational Planner for Personalized Urban Itineraries

    Article • November 2025, ACM (Association for Computing Machinery)

    Raffaele Perego

  3. Getting off the DIME: Dimension Pruning via Dimension Importance Estimation for Dense Information Retrieval

    Article • ACM Transactions on Information Systems, October 2025, ACM (Association for Computing Machinery)

    Guglielmo Faggioli, Raffaele Perego

  4. Projection-Displacement-Based Query Performance Prediction for Embedded Space of Dense Retrievers

    Article • ACM Transactions on Information Systems, October 2025, ACM (Association for Computing Machinery)

    Raffaele Perego, Guglielmo Faggioli

  5. Efficient Conversational Search via Topical Locality in Dense Retrieval

    Article • July 2025, ACM (Association for Computing Machinery)

    Raffaele Perego, Cosimo Rulli

  6. CoSRec: A Joint Conversational Search and Recommendation Dataset

    Article • July 2025, ACM (Association for Computing Machinery)

    Raffaele Perego, Guglielmo Faggioli, Tommaso Di Noia, Simone Merlo

  7. Efficient Re-ranking with Cross-encoders via Early Exit

    Article • July 2025, ACM (Association for Computing Machinery)

    Raffaele Perego, Claudio Lucchese

  8. CoDIME: A Counterfactual Approach for Dimension Importance Estimation through Click Logs

    Article • July 2025, ACM (Association for Computing Machinery)

    Guglielmo Faggioli, Raffaele Perego

  9. Explainable, Effective, and Efficient Learning-to-Rank Models Using ILMART

    Article • ACM Transactions on Information Systems, April 2025, ACM (Association for Computing Machinery)

    Claudio Lucchese, Raffaele Perego

  10. Early Exit Strategies for Approximate k -NN Search in Dense Retrieval

    Article • October 2024, ACM (Association for Computing Machinery)

    Claudio Lucchese, Raffaele Perego

  11. Learning to Rank for Non Independent and Identically Distributed Datasets

    Article • August 2024, ACM (Association for Computing Machinery)

    Raffaele Perego

  12. Dimension Importance Estimation for Dense Information Retrieval

    Article • July 2024, ACM (Association for Computing Machinery)

    Guglielmo Faggioli, Raffaele Perego

  13. SE-PQA: Personalized Community Question Answering

    Article • May 2024, ACM (Association for Computing Machinery)

    Raffaele Perego

  14. SE-PEF: a Resource for Personalized Expert Finding

    Article • November 2023, ACM (Association for Computing Machinery)

    Raffaele Perego

  15. TrajParquet: A Trajectory-Oriented Column File Format for Mobility Data Lakes

    Article • November 2023, ACM (Association for Computing Machinery)

    Raffaele Perego

  16. Can Embeddings Analysis Explain Large Language Model Ranking?

    Article • October 2023, ACM (Association for Computing Machinery)

    Claudio Lucchese, Raffaele Perego

  17. Post-hoc Selection of Pareto-Optimal Solutions in Search and Recommendation

    Article • October 2023, ACM (Association for Computing Machinery)

    Raffaele Perego, Tommaso Di Noia

  18. A Geometric Framework for Query Performance Prediction in Conversational Search

    Article • July 2023, ACM (Association for Computing Machinery)

    Raffaele Perego, Guglielmo Faggioli

  19. Caching Historical Embeddings in Conversational Search

    Article • ACM Transactions on the Web, December 2022, ACM (Association for Computing Machinery)

    Raffaele Perego

  20. The Istella22 Dataset

    Article • July 2022, ACM (Association for Computing Machinery)

    Raffaele Perego, Domenico Dato

  21. ILMART: Interpretable Ranking with Constrained LambdaMART

    Article • July 2022, ACM (Association for Computing Machinery)

    Claudio Lucchese, Raffaele Perego

  22. Hierarchical Dependence-aware Evaluation Measures for Conversational Search

    Article • July 2021, ACM (Association for Computing Machinery)

    Raffaele Perego

  23. Learning Early Exit Strategies for Additive Ranking Ensembles

    Article • July 2021, ACM (Association for Computing Machinery)

    Raffaele Perego, Claudio Lucchese

  24. Report on the 43rd european conference on information retrieval (ECIR 2021)

    Article • ACM SIGIR Forum, June 2021, ACM (Association for Computing Machinery)

    Raffaele Perego

  25. Weighting Passages Enhances Accuracy

    Article • ACM Transactions on Information Systems, April 2021, ACM (Association for Computing Machinery)

    Raffaele Perego

  26. A novel similarity measure for multiple aspect trajectory clustering

    Article • March 2021, ACM (Association for Computing Machinery)

    Iraklis Varlamis, Raffaele Perego

  27. Efficient Document Re-Ranking for Transformers by Precomputing Term Representations

    Article • July 2020, ACM (Association for Computing Machinery)

    Raffaele Perego

  28. Training Curricula for Open Domain Answer Re-Ranking

    Article • July 2020, ACM (Association for Computing Machinery)

    Raffaele Perego

  29. Query-level Early Exit for Additive Learning-to-Rank Ensembles

    Article • July 2020, ACM (Association for Computing Machinery)

    Claudio Lucchese, Raffaele Perego

  30. Expansion via Prediction of Importance with Contextualization

    Article • July 2020, ACM (Association for Computing Machinery)

    Raffaele Perego

  31. Topic Propagation in Conversational Search

    Article • July 2020, ACM (Association for Computing Machinery)

    Raffaele Perego

  32. Cloud and Data Federation in MobiDataLab

    Article • June 2020, ACM (Association for Computing Machinery)

    Raffaele Perego

  33. Transitioning the information retrieval literature to a fully open access model

    Article • ACM SIGIR Forum, June 2020, ACM (Association for Computing Machinery)

    Raffaele Perego

  34. Enhanced News Retrieval

    Article • July 2019, ACM (Association for Computing Machinery)

    Raffaele Perego

  35. X-CLE a VER

    Article • ACM Transactions on Intelligent Systems and Technology, November 2018, ACM (Association for Computing Machinery)

    Raffaele Perego, Claudio Lucchese

  36. Efficient and Effective Query Expansion for Web Search

    Article • October 2018, ACM (Association for Computing Machinery)

    Claudio Lucchese, Raffaele Perego

  37. SEL: A unified algorithm for salient entity linking

    Article • Computational Intelligence, November 2017, Wiley

    David Losada, Raffaele Perego

  38. RankEval

    Article • August 2017, ACM (Association for Computing Machinery)

    Raffaele Perego

  39. Social Media Image Recognition for Food Trend Analysis

    Article • August 2017, ACM (Association for Computing Machinery)

    Raffaele Perego

  40. On Including the User Dynamic in Learning to Rank

    Article • August 2017, ACM (Association for Computing Machinery)

    Raffaele Perego

  41. X-DART

    Article • August 2017, ACM (Association for Computing Machinery)

    Raffaele Perego

  42. Exploring Social Media for Event Attendance

    Article • July 2017, ACM (Association for Computing Machinery)

    Raffaele Perego

  43. Polarized User and Topic Tracking in Twitter

    Article • July 2016, ACM (Association for Computing Machinery)

    Raffaele Perego

  44. The ComeWithMe System for Searching and Ranking Activity-Based Carpooling Rides

    Article • July 2016, ACM (Association for Computing Machinery)

    Raffaele Perego

  45. Post-Learning Optimization of Tree Ensembles for Efficient Ranking

    Article • July 2016, ACM (Association for Computing Machinery)

    Raffaele Perego

  46. Speeding up Document Ranking with Rank-based Features

    Article • August 2015, ACM (Association for Computing Machinery)

    Raffaele Perego

  47. QuickScorer

    Article • August 2015, ACM (Association for Computing Machinery)

    Raffaele Perego

  48. Manual Annotation of Semi-Structured Documents for Entity-Linking

    Article • November 2014, ACM (Association for Computing Machinery)

    Raffaele Perego

  49. Learning relatedness measures for entity linking

    Article • January 2013, ACM (Association for Computing Machinery)

    Raffaele Perego

  50. Load-sensitive selective pruning for distributed search

    Article • January 2013, ACM (Association for Computing Machinery)

    Raffaele Perego

  51. Where shall we go today?

    Article • January 2013, ACM (Association for Computing Machinery)

    Raffaele Perego