Tutorials at International conferences

User profiling with Graph Neural Networks

• Leveraging Graph Neural Networks for User Profiling: Recent Advances and Open Challenges (with E. Purificato and E.W. De Luca), at the32nd ACM International Conference on Information and Knowledge Management (CIKM ’23), Birmingham (UK), October 21, 2023.
• Tutorial on User Profiling with Graph Neural Networks and Related Beyond-Accuracy Perspectives (with E. Purificato and E.W. De Luca), at the 31st ACM Conference on User Modeling, Adaptation and Personalization (UMAP ’23), Limassol (Cyprus), June 26, 2023.

Explainable recommender systems

• Hands on Explainable Recommender Systems with Knowledge Graphs (with G. Balloccu, G. Fenu, and M. Marras), at the 16th ACM Conference on Recommender Systems (RecSys 2022), Seattle (WA, USA), September 18, 2022.

Algorithmic bias and fairness in recommender systems

• Countering Bias in Personalized Rankings: From Data Engineering to Algorithm Development (with M. Marras), at the 37th IEEE International Conference on Data Engineering (ICDE 2021), Online from Chania (Greece), April 21, 2021.
• Operationalizing Treatments against Bias: Challenges and Solutions (with M. Marras), at the 43rd European Conference on Information Retrieval (ECIR 2021), Online from Lucca (Italy), April 1, 2021.
• Advances in Bias-aware Recommendation on the Web (with M. Marras), at the 14th International Conference on Web Search and Data Mining (WSDM 2021), Online from Jerusalem (Israel), March 8, 2021.
• Bias in Personalized Rankings: Concepts to Code (with M. Marras), at the 20th IEEE International Conference on Data Mining (ICDM 2020), Online from Sorrento (Italy), November 17, 2020.
• Hands on Data and Algorithmic Bias in Recommender Systems (with M. Marras), at the 28th ACM Conference on User Modeling, Adaptation and Personalization (UMAP 2020), Online from Genova (Italy), July 17, 2020.

Group recommendation

• Challenges and Solutions in Group Recommender Systems, at the 17th IEEE International Conference on Data Mining (ICDM 2017), New Orleans (USA), November 18-21, 2017.
• Group Recommender Systems, at the 10th ACM Conference on Recommender Systems (RecSys 2016), Boston (USA), September 19, 2016.
• Group Recommendation: Theory, Algorithms, and Applications, at the 22nd European Conference on Artificial Intelligence (ECAI 2016), The Hague (Netherlands), August 29, 2016.
• Group Recommender Systems: State of the Art, Emerging Aspects and Techniques, and Research Challenges, at the 38th European Conference on Information Retrieval (ECIR 2016), Padua (Italy), March 20, 2016.

User modeling and personalization for mobility

• Data Sources and Techniques to Mine Human Mobility Patterns (with C. Herrero, A. Kaltenbrunner, M. Manca, G. Stilo), at the 5th IEEE International Conference on Data Science and Advanced Analytics (DSAA 2018), Turin (Italy), October 2, 2018.

Invited talks

• Interplay between Upsampling and Regularization for Provider Fairness in Recommender Systems. Mila – Quebec Artificial Intelligence Institute, Online, December 1, 2022.
• Interplay between Upsampling and Regularization for Provider Fairness in Recommender Systems. University of Glasgow, Online, November 28, 2022.
• How do data imbalances impact on the recommendations we get? Possible consequences in terms of algorithmic bias and algorithmic fairness. BBC Data Dates, Online, September 28, 2022.
• Generating Recommendations to Automatically-Detected Groups of Users. Sapienza University of Rome, Rome (Italy), November 4, 2015.
• Group Recommendation with Automatic Detection of Groups. Yahoo! Research Barcelona Seminar, Barcelona (Spain), July 24, 2010.

Editorial activity

• Editorial board member of Springer’s “Journal of Intelligent Information Systems” (since 2021).
• Editorial board member of Elsevier’s “Information Processing & Management” journal (since 2019).
• Guest editor of the special issue on “Social Media for Personalization and Search” of the Information Retrieval Journal (Springer), with Giovanni Stilo and Andreas Kaltenbrunner.
• Guest editor of the special issue on “Data-Driven User Behavioral Modeling: From Real-World Behavior to Knowledge, Algorithms, and Systems” of the Journal of Intelligent Information Systems (Springer), with Eloisa Vargiu.
• Guest editor of the special issue on “Advances in Computer-Human Interaction for Recommender Systems” of the International Journal of Human-Computer Studies (Elsevier), with Lucio Davide Spano.
• Guest editor of the special issue on “Behavioral-Data Mining in Information Systems and the Big Data Era” of Information Systems Frontiers (Springer), with Salvatore Carta, Matteo Manca, and Andreas Kaltenbrunner.
• Guest editor of the special issue on “Human-Computer Interaction and the Social Web” of Future Internet, with Salvatore Carta, 2016.

Conference chairing

• The 17th ACM Conference on Recommender Systems (RecSys 2023), Workshop track, with Mi Zhang and Victor Sheng
• The 31st ACM Conference on User Modeling, Adaptation and Personalization (UMAP 2023), Demo and Late Breaking Results track, with Alisa Rieger and Shaghayegh (Sherry) Sahebi
• The 30th ACM Conference on User Modeling, Adaptation and Personalization (UMAP 2022), General chair, with Alejandro Bellogín and Olga C. Santos
• The 33rd ACM Conference on Hypertext and Social Media (HT 2022), General chair, with Alejandro Bellogín
• The 16th ACM Conference on Recommender Systems (RecSys 2022), “Demo and Late Breaking Results” track co-chair, with Pigi Kouki
• The 15th ACM Conference on Recommender Systems (RecSys 2021), “Demo” track co-chair, with Pigi Kouki
• The 29th Conference on User Modeling, Adaptation and Personalization, “Personalized Recommender Systems” track co-chair, with Alejandro Bellogin and Sole Pera
• The 14th ACM Conference on Recommender Systems (RecSys 2020), “Demo and Late Breaking Results” track co-chair, with Denis Parra

Organization of scientific meetings

• First Workshop on User Perspectives in Human-Centred Artificial Intelligence (HCAI4U) (with E. W. De Luca, E. Purificato, S. Marrone, and C. Sansone), at the 15th Biannual Conference of the Italian SIGCHI Chapter (CHItaly 2023)
• 4th International Workshop on Algorithmic Bias in Search and Recommendation (Bias 2022) (with S. Faralli, M. Marras, and G. Stilo), at the 45th European Conference on Information Retrieval (ECIR 2023)
• 3rd International Workshop on Algorithmic Bias in Search and Recommendation (Bias 2022) (with S. Faralli, M. Marras, and G. Stilo), at the 44th European Conference on Information Retrieval (ECIR 2022)
• 2nd International Workshop on Algorithmic Bias in Search and Recommendation (Bias 2021) (with S. Faralli, M. Marras, and G. Stilo), at the 43rd European Conference on Information Retrieval (ECIR 2021)
• International Workshop on Algorithmic Bias in Search and Recommendation (Bias 2020) (with S. Faralli, M. Marras, and G. Stilo), at the 42nd European Conference on Information Retrieval (ECIR 2020)
• Second International Workshop on Knowledge Discovery and User Modeling for Smart Cities (with R. Alzaidy, M.G. Armentano, A. Tommasel, and C.L. Giles), at the European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML-PKDD 2019)
• Third Workshop on Social Media for Personalization And Search (SoMePeAS 2019) (with G. Stilo), at the 41th European Conference on Information Retrieval (ECIR 2019)
• Workshop on Social Interaction-based Recommendation (SIR 2018) (with G. Stilo, C. Morbidoni, and S. Faralli) at the 27th International Conference on Information and Knowledge Management (CIKM 2018)
• Workshop on Social Aspects in Personalization and Search (SoAPS 2018) (with G. Stilo), at the 40th European Conference on Information Retrieval (ECIR 2018)
• Second Workshop on Semantics-Enabled Recommender Systems (SERecSys 2017) (with G. Stilo and S. Carta), at the 17th IEEE International Conference on Data Mining (ICDM 2017)
• Second Workshop on Engineering Human-Computer Interaction in Recommender Systems (with S. Carta and G. Fenu) at the 9th ACM SIGCHI Symposium on Engineering Interactive Computing Systems (EICS 2017)
• Workshop on Social Media for Personalization And Search (SoMePeAS 2017) (with A. Kaltenbrunner and G. Stilo), at the 39th European Conference on Information Retrieval (ECIR 2017)
• Workshop on Semantics-Enabled Recommender Systems (SERecSys 2016) (with G. Stilo and S. Carta), at the 16th IEEE International Conference on Data Mining (ICDM 2016)
• Workshop on Engineering Human-Computer Interaction in Recommender Systems (with L.D. Spano, S. Carta, and G. Fenu), at the 8th ACM SIGCHI Symposium on Engineering Interactive Computing Systems (EICS 2016)

Program Committee (PC) Member

• ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD) – 2019-2022
• ACM International Conference on Web Search and Data Mining (WSDM) – 2018-2023
• The ACM Web Conference (WWW) – 2018-2023
• Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR) – 2020-2022
• IEEE International Conference on Data Mining (ICDM) – 2020-2022
• ACM Conference on Recommender Systems (RecSys) – 2017-2022
• ACM Conference on User Modeling, Adaptation and Personalization (UMAP) – 2018-2023
• International AAAI Conference on Web and Social Media (ICWSM) – 2017-2022
• International Conference on Information and Knowledge Management (CIKM) – 2020-2022
• European Conference on Machine Learning and Knowledge Discovery in Databases (ECML-PKDD) – 2020-2022
• Annual Meeting of the Association for Computational Linguistics (ACL) – 2019-2021
• International Conference on Intelligent User Interfaces (IUI) – 2017