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Proceedings of the 11th Italian Information Retrieval Workshop 2021, Bari, Italy, September 13-15, 2021

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A Regression Framework to Interpret the Robustness of Recommender Systems Against Shilling Attacks
Yashar Deldjoo | Tommaso Di Noia | Eugenio Di Sciascio | Felice Antonio Merra

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AURYGA: A Recommender System for Game Tagging
Riccardo Rubei | Claudio Di Sipio

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An Investigation on the Impact of Natural Language on Conversational Recommendations
Andrea Iovine | Fedelucio Narducci | Marco de Gemmis | Giovanni Semeraro

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An Overview on Evaluation Labs and Open Issues in Health-related Credible Information Retrieval
Rishabh Upadhyay | Gabriella Pasi | Marco Viviani

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Combining Mitigation Treatments against Biases in Personalized Rankings: Use Case on Item Popularity
Ludovico Boratto | Gianni Fenu | Mirko Marras

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Do Hard Topics Exist? A Statistical Analysis
J. Shane Culpepper | Guglielmo Faggioli | Nicola Ferro | Oren Kurland

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Extracting Relations from Italian Wikipedia using Unsupervised Information Extraction
Pierluigi Cassotti | Lucia Siciliani | Pierpaolo Basile | Marco de Gemmis | Pasquale Lops

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FashionSearch++: Improving Consumer-to-Shop Clothes Retrieval with Hard Negatives
Davide Morelli | Marcella Cornia | Rita Cucchiara

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GUapp: Enhancing Job Recommendations with Knowledge Graphs
Giovanni Maria Biancofiore | Tommaso Di Noia | Eugenio Di Sciascio | Fedelucio Narducci | Paolo Pastore

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Garbled-Word Embeddings for Jumbled Text
Gianluca Sperduti | Alejandro Moreo | Fabrizio Sebastiani

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Generalized Funnelling: Ensemble Learning and Heterogeneous Document Embeddings for Cross-Lingual Text Classification
Andrea Pedrotti | Fabrizio Sebastiani | Alejandro Moreo

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Holistic Summarization of Recommender Systems Results
Noemi Mauro | Zhongli Filippo Hu | Liliana Ardissono | Sara Capecchi | Gianmarco Izzi | Claudio Mattutino

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How to Perform Reproducible Experiments in the ELLIOT Recommendation Framework: Data Processing, Model Selection, and Performance Evaluation
Vito Walter Anelli | Alejandro Bellogín | Antonio Ferrara | Daniele Malitesta | Felice Antonio Merra | Claudio Pomo | Francesco Maria Donini | Eugenio Di Sciascio | Tommaso Di Noia

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Keyword Extraction for Improved Document Retrieval in Conversational Search
Oleg Borisov | Mohammad Aliannejadi | Fabio Crestani

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Measuring Gender Stereotype Reinforcement in Information Retrieval Systems
Alessandro Fabris | Alberto Purpura | Gianmaria Silvello | Gian Antonio Susto

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Measuring the Ranking Quality of Recommendations in a Two-Dimensional Carousel Setting
Nicolò Felicioni | Maurizio Ferrari Dacrema | Fernando Benjamín Pérez Maurera | Paolo Cremonesi

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Multidimensional Relevance in Legal and Health Domains
Georgios Peikos | Gabriella Pasi

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Neural IR for Domain-Specific Tasks
Oscar Espitia | Gabriella Pasi

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On Building Benchmark Datasets for Understudied Information Retrieval Tasks: the Case of Semantic Query Labeling
Elias Bassani | Gabriella Pasi

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On Single and Multiple Representations in Dense Passage Retrieval
Craig Macdonald | Nicola Tonellotto | Iadh Ounis

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Quality and Diversity of Recommender Systems Users' Choices: a Simulation Perspective
Naieme Hazrati | Francesco Ricci

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Reading Songs: A Computational Analysis of Popular Songs lyrics
Silvia Corbara | Alessio Molinari

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Recommending Third-party Library Updates with LSTM Neural Networks
Phuong Thanh Nguyen | Juri Di Rocco | Riccardo Rubei | Claudio Di Sipio | Davide Di Ruscio

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Representing, Tracking and Revising the User's Knowledge: A Search Result Filter Framework
Dima El Zein | Célia da Costa Pereira

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SAFIR: a Semantic-Aware Neural Framework for IR
Maristella Agosti | Stefano Marchesin | Gianmaria Silvello

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Sequential Modeling in Vector Space
Benyou Wang | Emanuele Di Buccio | Massimo Melucci

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Similarity-Based Reasoning and Retrieval with Order-Sorted Feature Logic
Gian Carlo Milanese | Gabriella Pasi

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Sparse Embeddings for Recommender Systems with Knowledge Graphs
Vito Walter Anelli | Tommaso Di Noia | Eugenio Di Sciascio | Antonio Ferrara | Alberto Carlo Maria Mancino

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Towards a Human in the Loop Approach to Preserve Privacy in Images
Andrea Mauri | Alessandro Bozzon

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User-friendly Query Interfaces for the HOPE Project
Diego Marcia | Manuela Sanguinetti | Maurizio Atzori

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Using an Ensemble of Features for Personalized Recommendations of Scientific Publications
Paolo Tenti | James Thomas | Rafael Peñaloza | Gabriella Pasi