Full Papers
| Sebastian Hofstätter, Aldo Lipani, Sophia Althammer, Markus Zlabinger and Allan Hanbury | Mitigating the Position Bias of Transformer Models in Passage Re-Ranking |
| Tetsuya Sakai | On the Instability of Diminishing Return IR Measures |
| Yufeng Lyu and Jiang Zhong | DSMER: A Deep Semantic Matching based Framework for Named Entity Recognition |
| Chen Qu, Liu Yang, Cen Chen, W. Bruce Croft, Kalpesh Krishna and Mohit Iyyer | Weakly-Supervised Open-Retrieval Conversational Question Answering |
| Arthur Brack, Daniel Uwe Müller, Anett Hoppe and Ralph Ewerth | Coreference Resolution in Research Papers from Multiple Domains |
| Max Berrendorf, Evgeniy Faerman and Volker Tresp | Active Learning for Entity Alignment |
| Yutao Zhu, Jian-Yun Nie, Kun Zhou, Pan Du and Zhicheng Dou | Content Selection Network for Document-grounded Retrieval-based Chatbots |
| Hesam Amoualian, Parantapa Goswami, Pradipto Das, Pablo Montalvo, Laurent Ach and Nathaniel Dean | A Dataset and Baselines for Multimodal Product Categorization and Cross-Modal Retrieval for E-Commerce |
| Rui Meng, Zhen Yue and Alyssa Glass | Predicting User Engagement Status for Online Evaluation of Intelligent Assistants |
| Firas Sabbah and Norbert Fuhr | A Transparent Logical Framework for Aspect-Oriented Product Ranking Based on User Reviews |
| Adam Jatowt, I-Chen Hung, Michael Färber, Ricardo Campos and Masatoshi Yoshikawa | Exploding TV Sets & Disappointing Laptops: Archival Content Suggestion by Finding Interesting Content from the Past |
| Hansi Zeng, Zhichao Xu and Qingyao Ai | A Zero Attentive Relevance Matching Network for Review Modeling in Recommendation |
| Elizabeth Gómez, Ludovico Boratto and Maria Salamo | Disparate Impact in Item Recommendation: a Case of Geographic Imbalance |
| Siqi Xiao, Qi Zhang, Jinquan Sun, Yu Wang and Lei Zhang | A Hierarchical Approach for Joint Extraction of Entities and Relations |
| Guglielmo Faggioli, Oleg Zendel, J. Shane Culpepper, Nicola Ferro and Falk Scholer | An Enhanced Evaluation Framework for Query Performance Prediction |
| Guillem Collell and Marie-Francine Moens | How Do Simple Transformations of Text and Image Features Impact Cosine-based Semantic Match? |
| Ghazaleh Haratinezhad Torbati, Andrew Yates and Gerhard Weikum | You Get What You Chat: Using Conversations to Personalize Search-based Recommendations |
| Wenyu Zhao, Dong Zhou, Lin Li and Jinjun Chen | Utilizing Local Tangent Information for Word Re-embedding |
| Ivano Lauriola and Alessandro Moschitti | Answer Sentence Selection using Local and Global Context in Transformer Models |
| Vito Walter Anelli, Yashar Deldjoo, Tommaso Di Noia, Antonio Ferrara and Fedelucio Narducci | FedeRank: User Controlled Feedback with Federated Recommender Systems |
| Luis Lugo, Jose G. Moreno and Gilles Hubert | Extracting Search Tasks from Query Logs Using a Recurrent Deep Clustering Architecture |
| Jesús Lovón-Melgarejo, Laure Soulier, Karen Pinel-Sauvagnat and Lynda Tamine | Studying the Catastrophic Forgetting Problem in Neural Ranking Models |
| Liangyi Kang, Jie Liu, Lingqiao Liu and Dan Ye | Label Definitions Augmented Interaction Model for Legal Charge Prediction |
| Luis Lugo, Jose G. Moreno and Gilles Hubert | Modeling User Search Tasks with a Language-agnostic Unsupervised Approach |
| Subhash Chandra Pujari, Annemarie Friedrich and Jannik Stroetgen | A Multi-Task Approach to Neural Multi-Label Hierarchical Patent Classification using Transformers |
| Alexandre Salle, Shervin Malmasi, Eugene Agichtein and Oleg Rokhlenko | Studying the Effectiveness of Conversational Search Refinement through User Simulation |
| Yucheng Li, Yan Yang, Qinmin Hu, Chengcai Chen and Liang He | An Argument Extraction Decoder in Open Information Extraction |
| Shahrzad Naseri, Jeffrey Dalton, Andrew Yates and James Allan | CEQE: Contextualized Embeddings for Query Expansion |
| Jiaming Qu, Jaime Arguello and Yue Wang | A Deep Analysis of an Explainable Retrieval Model for Precision Medicine Literature Search |
| Mariia Garkavenko, Hamid Mirisaee, Eric Gaussier, Agnes Guerraz and Cédric Lagnier | Valuation of Startups: a Machine Learning Perspective |
| Ivan Sekulic, Mohammad Aliannejadi and Fabio Crestani | User Engagement Prediction for Clarification in Search |
| Arian Pasquali, Ricardo Campos, Alexandre Ribeiro, Brenda Santana, Alipio M. Jorge and Adam Jatowt | TLS-Covid19: A New Annotated Corpus for Timeline Summarization |
| Jumanah Alshehri, Marija Stanojevic, Eduard Dragut and Zoran Obradovic | Stay on Topic, Please: Aligning User Comments to the Content of a News Article |
| Saar Kuzi and Chengxiang Zhai | A Study of Distributed Representations for Figures of Research Articles |
| Zhengzhong Liang, Yiyun Zhao and Mihai Surdeanu | Using the Hammer Only on Nails: A Hybrid Method for Representation-based Evidence Retrieval for Question Answering |
| Leonid Boytsov and Zico Kolter | Exploring Classic and Neural Lexical Translation Models: Interpretability, Effectiveness, and Efficiency Benefits |
| Bartłomiej Twardowski, Paweł Zawistowski and Szymon Zaborowski | Metric Learning for Session-based Recommendations |
| Thuy Vu and Alessandro Moschitti | Machine Translation Customization via Automatic Training Data Selection from the Web |
| Luyu Gao, Zhuyun Dai, Tongfei Chen, Zhen Fan, Benjamin Van Durme and Jamie Callan | Complement Lexical Retrieval Model with Semantic Residual Embeddings |
| Rima Hazra, Hardik Aggarwal, Pawan Goyal, Animesh Mukherjee and Soumen Chakrabarti | Joint Autoregressive and Graph Models for Software and Developer Social Networks |
| Rafael Ferreira, Mariana Leite, David Semedo and Joao Magalhaes | Open-Domain Conversational Search Assistant with Transformers |
| Robert Litschko, Ivan Vulić, Simone Paolo Ponzetto and Goran Glavaš | Evaluating Multilingual Text Encoders for Unsupervised Cross-Lingual Retrieval |
| Zulfat Miftakhutdinov, Artur Kadurin, Roman Kudrin and Elena Tutubalina | Drug and Disease Interpretation Learning with Biomedical Entity Representation Transformer |
| Mojtaba Nayyeri, Sahar Vahdati, Emanuel Sallinger, Mirza Mohtashim Alam, Hamed Shariat Yazdi and Jens Lehmann | Pattern-Aware and Noise-Resilient Embedding Models |
| Bing Liu, Guido Zuccon, Wen Hua and Weitong Chen | Knowledge Graph Convolution Networks for Ranking Diagnoses |
| Daomin Ji, Zhenglong Xiang and Yuanxiang Li | Personalized User Representation Construction Model for Collaborative Filtering |
| Quoc-Tuan Truong and Hady Lauw | Sentiment-Oriented Metric Learning for Text-to-Image Retrieval |
| Andrés García-Silva and Jose Manuel Gomez-Perez | Classifying Scientific Publications with BERT – Is Self-Attention a Feature Selection Method? |
| Chen Wang and Jiang Zhong | GCE: Global Contextual Information for Knowledge Graph Embedding |
| Masahiro Sato, Janmajay Singh, Sho Takemori and Qian Zhang | Causality-Aware Neighborhood Methods for Recommender Systems |
| Wei Wang, Piji Li and Hai-Tao Zheng | Consistency and Coherency Enhanced Story Generation |
Short Papers
| Negar Arabzadeh, Amin Bigdeli, Morteza Zihayat and Ebrahim Bagheri | Query Performance Prediction through Retrieval Coherency |
| Omkar Gurjar and Manish Gupta | Should I visit this place? Inclusion and Exclusion Phrase Mining from Reviews |
| Qiang Zhang, Jonathan Cook and Emine Yilmaz | Detecting and Forecasting Misinformation by Temporal Point Processes |
| Chen Lin, Joyce C. Ho and Eugene Agichtein | Cross-modal Memory Fusion Network for Multimodal Sequential Learning with Missing Values |
| Alberto Purpura, Karolina Buchner, Gianmaria Silvello and Gian Antonio Susto | Neural Feature Selection for Learning to Rank |
| Yuki Amemiya, Tomohiro Manabe, Sumio Fujita and Tetsuya Sakai | How Do Users Revise Zero-Hit Product Search Queries? |
| Emanuela Boros, Jose Moreno and Antoine Doucet | Event Detection with Entity Markers |
| Furkan Şahinuç and Cagri Toraman | Tweet Length Matters: A Comparative Analysis on Topic Detection in Microblogs |
| Dorian Kodelja, Romaric Besançon and Olivier Ferret | Dynamic Cross-Sentential Context Representation for Event Detection |
| Garrett Allen, Brody Downs, Aprajita Shukla, Casey Kennington, Jerry Fails, Katherine Wright and Maria Soledad Pera | BiGBERT: Classifying Educational Web Resources for Kindergarten-12thGrades |
| Rodger Benham, Alistair Moffat and J. Shane Culpepper | Bayesian System Inference On Shallow Pools |
| Zhengyu Chen, Donglin Wang and Shiqian Yin | Improving Cold-Start Recommendation via Multi-Prior Meta-Learning |
| Gustavo Penha and Claudia Hauff | Weakly Supervised Label Smoothing |
| Xuanang Chen, Ben He, Kai Hui, Le Sun and Yingfei Sun | Simplified TinyBERT: Knowledge Distillation for Document Retrieval |
| Tianle Fu, Qi Tian and Hui Li | SQE-GAN: a Supervised Query Expansion Scheme via GAN |
| Harsh Kohli | Transfer Learning and Augmentation for Word Sense Disambiguation |
| Dominik Ramsauer and Udo Kruschwitz | Exploring the Incorporation of Opinion Polarity for Abstractive Multi-Document Summarisation |
| Anna Nguyen, Adrian Oberföll and Michael Färber | Right for the Right Reasons: Making Image Classification Intuitively Explainable |
| Disen Wang and Hui Fang | Predicting Question Responses to Improve the Performance of Retrieval-based Chatbot |
| Amin Bigdeli, Negar Arabzadeh, Morteza Zihayat and Ebrahim Bagheri | Exploring Gender Biases in Information Retrieval Relevance Judgement Datasets |
| Shengyao Zhuang, Hang Li and Guido Zuccon | Deep Query Likelihood Model for Information Retrieval |
| Takumi Takahashi, Motoki Taniguchi, Tomoki Taniguchi and Tomoko Ohkuma | Multi-Span Extractive Reading Comprehension without Multi-Span Supervision |
| Alejandro Ariza, Francesco Fabbri, Ludovico Boratto and Maria Salamo | From The Beatles to Billie Eilish: Connecting Provider Representativeness and Exposure in Session-based Recommender Systems |
| Michael Fromm, Max Berrendorf, Sandra Obermeier, Thomas Seidl and Evgeniy Faerman | Diversity Aware Relevance Learning for Argument Search |
| Denisa Roberts | Multilingual Evidence Retrieval and Claim Verification to Combat Global Disinformation: The Power of Polyglotism |
| Leon Schüller, Florian Wilhelm, Nico Kreiling and Goran Glavaš | Windowing Models for Abstractive Summarization of Long Texts |
| Sreekanth Madisetty and Maunendra Sankar Desarkar | Social Media Popularity Prediction of Planned Events using Deep Learning |
| Yudhik Agrawal, Ramaguru Guru Ravi Shanker and Vinoo Alluri | Transformer-based approach towards music emotion recognition from lyrics |
| Dominic Seyler, Wei Liu, Xiaofeng Wang and Chengxiang Zhai | Towards Dark Jargon Interpretation in Underground Forums |
| Dongsheng Wang, Casper Hansen, Lucas Chaves Lima, Christian Hansen, Maria Maistro, Jakob Grue Simonsen and Christina Lioma | Multi-Head Self-Attention with Role-Guided Masks |
| Nirmal Roy, Manuel Valle Torre, Ujwal Gadiraju, David Maxwell and Claudia Hauff | How Do Active Reading Strategies Affect Learning Outcomes in Web Search? |
| Thibault Formal, Stéphane Clinchant and Benjamin Piwowarski | A White Box Analysis of ColBERT |
| Hongchien Yu, Zhuyun Dai and Jamie Callan | PGT: Pseudo Relevance Feedback Using a Graph-based Transformer |
| Qi Zhang, Siliang Tang, Jinquan Sun, Yu Wang and Lei Zhang | Clustering-augmented Multi-Instance Learning for Neural Relation Extraction |
| Luyu Gao, Zhuyun Dai and Jamie Callan | Rethink Training of BERT Rerankers in Multi-Stage Retrieval Pipeline |
| Xabier Saralegi and Iñaki San Vicente | Fine-tuning BERT for COVID-19 domain ad-hoc IR by using pseudo-qrels |
| Svitlana Vakulenko, Voskarides Nikos, Zhucheng Tu and Shayne Longpre | A Comparison of Question Rewriting Methods for Conversational Passage Retrieval |
| Luís Borges, Bruno Martins and Jamie Callan | Assessing the Benefits of Model Ensembles in Neural Re-Ranking for Passage Retrieval |
| Anastasia Taranova and Martin Braschler | Textual Complexity as an Indicator of Document Relevance |
Reproducibility Papers
| Peter Müllner, Dominik Kowald and Elisabeth Lex | Robustness of Meta Matrix Factorization Against Strict Privacy Constraints |
| Alejandro Moreo Fernández and Fabrizio Sebastiani | Re-Assessing the “Classify and Count” Quantification Method |
| Marcos Fernández-Pichel, Juan Carlos Pichel, David Enrique Losada and David Elsweiler | Reliability Prediction for Health-related Content: A Replicability Study |
| Max Berrendorf, Ludwig Wacker and Evgeniy Faerman | A Critical Assessment of State-of-the-Art in Entity Alignment |
| Guglielmo Faggioli and Nicola Ferro | System Effect Estimation by Sharding: A Comparison between ANOVA Approaches to Detect Significant Differences |
| Sophia Althammer, Sebastian Hofstätter and Allan Hanbury | Cross-domain Retrieval in the Legal and Patent Domains: a Reproducability Study |
| Johannes Kiesel, Lars Meyer, Florian Kneist, Benno Stein and Martin Potthast | An Empirical Comparison of Web Page Segmentation Algorithms |
| Anu Shrestha and Francesca Spezzano | Textual Characteristics of News Title and Body to Detect Fake News: A Reproducibility Study |
| Xinyu Zhang, Andrew Yates and Jimmy Lin | Comparing Score Aggregation Approaches for Pretrained Neural Language Models |
| Rajdeep Mukherjee, Shreyas Shetty, Subrata Chattopadhyay, Subhadeep Maji, Samik Datta and Pawan Goyal | Reproducibility, Replicability and Beyond: Assessing Production Readiness of Aspect Based Sentiment Analysis in the Wild |
| Shuyi Wang, Shengyao Zhuang and Guido Zuccon | Federated Online Learning to Rank with Evolution Strategies: A Reproducibility Study |
Demo Papers
| Jens-Michalis Papaioannou, Manuel Mayrdorfer, Sebastian Arnold, Felix A. Gers, Klemens Budde and Alexander Löser | Aspect-based Passage Retrieval with Contextualized Discourse Vectors |
| Hossein Fani, Mahtab Tamannaee, Fattane Zarrinkalam, Jamil Samouh, Samad Paydar and Ebrahim Bagheri | An Extensible Toolkit of Query Refinement Methods and Gold Standard Dataset Generation |
| Timo Breuer, Nicola Ferro, Maria Maistro and Philipp Schaer | repro_eval: A Python Interface to Reproducibility Measures of System-oriented IR Experiments |
| Emrah Inan, Paul Thompson, Tim Yates and Sophia Ananiadou | HSEarch: semantic search system for workplace accident reports |
| David Maxwell and Claudia Hauff | LogUI: Contemporary Logging Infrastructure for Web-Based Experiments |
| Karin Verspoor, Simon Suster, Yulia Otmakhova, Shevon Mendis, Zenan Zhai, Biaoyan Fang, Jey Han Lau, Timothy Baldwin, Antonio Jimeno and David Martinez | Brief description of COVID-SEE: The Scientific Evidence Explorer for COVID-19 Related Research |
| Antonia Saravanou, Nikolaos Panagiotou and Dimitrios Gunopulos | News Monitor: A Framework For QueryingNews in Real Time |
| Ricardo Campos, Jorge Duque, Tiago Cândido, Jorge Mendes, Alipio M. Jorge and Célia Nunes | Time-Matters: Temporal Unfolding of Texts |
| Alessandro Benedetto Melchiorre, Verena Haunschmid, Markus Schedl and Gerhard Widmer | LEMONS: Listenable Explanations for Music recOmmeNder Systems |
| James Brill, Dyaa Albakour, Jose Alberto Esquivel, Udo Kruschwitz, Miguel Martinez and Jon Chamberlain | Signal Briefings: Monitoring News Beyond the Brand |
| Emmanouil Smyrnakis, Katerina Papantoniou, Panagiotis Papadakos and Yannis Tzitzikas | Chattack: A Gamified Crowd-sourcing Platform for Tagging Deceptive & Abusive Behaviour |
| Amal Htait and Leif Azzopardi | AWESSOME: An Unsupervised Sentiment Intensity Scoring Framework using Neural Word Embeddings |
| Jaiden Harding, Tom Bridge and Gianluca Demartini | CoralExp: An Explainable System to Support Coral Taxonomy Research |
| Prajna Upadhyay and Maya Ramanath | PreFace++: Faceted Retrieval of Prerequisites and Technical Data |
| Abhishek Kaushik, Nicolas Loir and Gareth Jones | Multi-view Conversational Search Interface using a Dialogue-Based Agent |
CLEF Papers
| Bogdan Ionescu, Henning Müller, Renaud Péteri, Asma Ben Abacha, Dina Demner-Fushman, Sadid Hasan, Obioma Pelka, Christoph M. Friedrich, Alba Garcia, Janadhip Jacutprakart, Vassili Kovalev, Serge Kozlovski, Jon Chamberlain, Adrian Clark, Antonio Campello, Hassan Moustahfid, Thomas Oliver, Abigail Schulz, Paul Brie, Raul Berari, Dimitri Fichou, Andrei Tauteanu, Mihai Dogariu, Liviu Daniel Stefan, Mihai Gabriel Constantin, Jérôme Deshayes and Adrian Popescu | The 2021 ImageCLEF BenchmarkMultimedia Retrieval in Medical, Nature,Internet and Social Media Applications |
| Javier Parapar, Patricia Martin-Rodilla, David Losada and Fabio Crestani | eRisk 2021: Pathological Gambling, Self-Harm and Depression Challenges |
| Jiayuan He, Biaoyan Fang, Hiyori Yoshikawa, Saber A. Akhondi, Christian Druckenbrodt, Camilo Thorne, Zubair Afzal, Zenan Zhai, Lawrence Cavedon, Trevor Cohn, Timothy Baldwin and Karin Verspoor | ChEMU 2021: Reaction Reference Resolution and Anaphora Resolution in Chemical Patents |
| Alexander Bondarenko, Lukas Gienapp, Maik Fröbe, Meriem Beloucif, Yamen Ajjour, Alexander Panchenko, Chris Biemann, Benno Stein, Henning Wachsmuth, Martin Potthast and Matthias Hagen | Overview of Touché 2021: Argument Retrieval |
| Janek Bevendorff, María Alberta Chulvi Ferriols, Gretel Liz De La Peña Sarracén, Mike Kestemont, Enrique Manjavacas, Ilia Markov, Maximilian Mayerl, Martin Potthast, Francisco Manuel Rangel Pardo, Paolo Rosso, Efstathios Stamatatos, Benno Stein, Matti Wiegmann and Eva Zangerle | Overview of PAN 2021: Authorship Verification, Profiling Hate Speech Spreaders on Twitter, and Style Change Detection |
| Behrooz Mansouri, Anurag Agarwal, Douglas Oard and Richard Zanibbi | Advancing Math-Aware Search: The ARQMath-2 Lab at CLEF 2021 |
| Liana Ermakova, Patrice Bellot, Pavel Braslavski, Jaap Kamps, Josiane Mothe, Diana Nurbakova, Irina Ovchinnikov and Eric Sanjuan | Text Simplification for Scientific Information Access: CLEF 2021 SimpleText Workshop |
| Lorraine Goeuriot, Hanna Suominen, Liadh Kelly, Laura Alonso Alemany, Nicola Brew-Sam, Viviana Cotik, Dario Filippo, Gabriela Gonzalez Saez, Franco Luque, Philippe Mulhem, Gabriella Pasi, Roland Roller, Sandaru Seneviratne, Jorge Vivaldi, Marco Viviani and Chenchen Xu | CLEF eHealth Evaluation Lab 2021 |
| Hervé Goëau and Alexis Joly | LifeCLEF 2021: Biodiversity Identification and Prediction Challenges |
| Philipp Schaer, Johann Schaible and Leyla Jael Garcia Castro | Living Lab Evaluation for Life and SocialSciences Search Platforms – LiLAS at CLEF 2021 |
| Preslav Nakov, Giovanni Da San Martino, Tamer Elsayed, Alberto Barrón-Cedeño, Rubén Míguez, Shaden Shaar, Firoj Alam, Fatima Haouari, Maram Hasanain, Nikolay Babulkov, Alex Nikolov, Gautam Kishore Shahi, Julia Maria Struß and Thomas Mandl | The CLEF-2021 CheckThat! Lab on Detecting Check-Worthy Claims, Previously Fact-Checked Claims, and Fake News |
| Anastasia Krithara, Anastasios Nentidis, Georgios Paliouras, Martin Krallinger and Antonio Miranda | BioASQ at CLEF2021: Large-scale biomedicalsemantic indexing and question answering |
Doctoral Consortium Papers
| Mahsa Abazari Kia | Automated Multi-Document Text Summarization from Heterogeneous Data Sources |
| Marwa Essam | Background Linking of News Articles |
| Diana Sousa and Francisco Couto | Deep Learning System for Biomedical Relation Extraction Combining External Sources of Knowledge |
| Pedro Ruas and Francisco M. Couto | Deep Semantic Entity Linking |
| Divi Galih Prasetyo Putri | Multidimensional Relevance in Task-Specific Retrieval |