Ioannis Arapakis

2025

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Beyond One-Size-Fits-All: A Study of Neural and Behavioural Variability Across Different Recommendation Categories.
Georgios Koutroumpas|Sebastian Idesis|Mireia Masias Bruns|Carlos Segura|Joemon M. Jose|Sergi Abadal|Ioannis Arapakis
Proceedings of the 2025 International ACM SIGIR Conference on Innovative Concepts and Theories in Information Retrieval, ICTIR 2025, Padua, Italy, 18 July 2025
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AdSight: Scalable and Accurate Quantification of User Attention in Multi-Slot Sponsored Search.
Mario Villaizán-Vallelado|Matteo Salvatori|Kayhan Latifzadeh|Antonio Penta|Luis A. Leiva|Ioannis Arapakis
Proceedings of the 48th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2025, Padua, Italy, July 13-18, 2025
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Large Language Model driven Policy Exploration for Recommender Systems.
Jie Wang|Alexandros Karatzoglou|Ioannis Arapakis|Joemon M. Jose
Proceedings of the Eighteenth ACM International Conference on Web Search and Data Mining, WSDM 2025, Hannover, Germany, March 10-14, 2025
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The 1st EReL@MIR Workshop on Efficient Representation Learning for Multimodal Information Retrieval.
Junchen Fu|Xuri Ge|Xin Xin|Haitao Yu|Yue Feng|Alexandros Karatzoglou|Ioannis Arapakis|Joemon M. Jose
Companion Proceedings of the ACM on Web Conference 2025, WWW 2025, Sydney, NSW, Australia, 28 April 2025 - 2 May 2025

2024

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Sparks of Surprise: Multi-objective Recommendations with Hierarchical Decision Transformers for Diversity, Novelty, and Serendipity.
Jie Wang|Alexandros Karatzoglou|Ioannis Arapakis|Xin Xin|Xuri Ge|Joemon M. Jose
Proceedings of the 33rd ACM International Conference on Information and Knowledge Management, CIKM 2024, Boise, ID, USA, October 21-25, 2024
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Empowering Legal Citation Recommendation via Efficient Instruction-Tuning of Pre-trained Language Models.
Jie Wang|Kanha Bansal|Ioannis Arapakis|Xuri Ge|Joemon M. Jose
Advances in Information Retrieval - 46th European Conference on Information Retrieval, ECIR 2024, Glasgow, UK, March 24-28, 2024, Proceedings, Part I
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IISAN: Efficiently Adapting Multimodal Representation for Sequential Recommendation with Decoupled PEFT.
Junchen Fu|Xuri Ge|Xin Xin|Alexandros Karatzoglou|Ioannis Arapakis|Jie Wang|Joemon M. Jose
Proceedings of the 47th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2024, Washington DC, USA, July 14-18, 2024
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Reinforcement Learning-based Recommender Systems with Large Language Models for State Reward and Action Modeling.
Jie Wang|Alexandros Karatzoglou|Ioannis Arapakis|Joemon M. Jose
Proceedings of the 47th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2024, Washington DC, USA, July 14-18, 2024

2022

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Choosing the Best of Both Worlds: Diverse and Novel Recommendations through Multi-Objective Reinforcement Learning.
Dusan Stamenkovic|Alexandros Karatzoglou|Ioannis Arapakis|Xin Xin|Kleomenis Katevas
WSDM '22: The Fifteenth ACM International Conference on Web Search and Data Mining, Virtual Event / Tempe, AZ, USA, February 21 - 25, 2022
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Supervised Advantage Actor-Critic for Recommender Systems.
Xin Xin|Alexandros Karatzoglou|Ioannis Arapakis|Joemon M. Jose
WSDM '22: The Fifteenth ACM International Conference on Web Search and Data Mining, Virtual Event / Tempe, AZ, USA, February 21 - 25, 2022

2021

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Impact of Response Latency on User Behaviour in Mobile Web Search.
Ioannis Arapakis|Souneil Park|Martin Pielot
CHIIR '21: ACM SIGIR Conference on Human Information Interaction and Retrieval, Canberra, ACT, Australia, March 14-19, 2021
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My Mouse, My Rules: Privacy Issues of Behavioral User Profiling via Mouse Tracking.
Luis A. Leiva|Ioannis Arapakis|Costas Iordanou
CHIIR '21: ACM SIGIR Conference on Human Information Interaction and Retrieval, Canberra, ACT, Australia, March 14-19, 2021
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When Choice Happens: A Systematic Examination of Mouse Movement Length for Decision Making in Web Search.
Lukas Brückner|Ioannis Arapakis|Luis A. Leiva
SIGIR '21: The 44th International ACM SIGIR Conference on Research and Development in Information Retrieval, Virtual Event, Canada, July 11-15, 2021

2020

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CHIIR '20: Conference on Human Information Interaction and Retrieval, Vancouver, BC, Canada, March 14-18, 2020.
Conference on Human Information Interaction and Retrieval (CHIIR) 2020
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A Price-per-attention Auction Scheme Using Mouse Cursor Information.
Ioannis Arapakis|Antonio Penta|Hideo Joho|Luis A. Leiva
ACM Transactions on Information Systems (TOIS) 2020 Volume 38 Issue 2
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Query Abandonment Prediction with Recurrent Neural Models of Mouse Cursor Movements.
Lukas Brückner|Ioannis Arapakis|Luis A. Leiva
CIKM '20: The 29th ACM International Conference on Information and Knowledge Management, Virtual Event, Ireland, October 19-23, 2020
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Learning Efficient Representations of Mouse Movements to Predict User Attention.
Ioannis Arapakis|Luis A. Leiva
Proceedings of the 43rd International ACM SIGIR conference on research and development in Information Retrieval, SIGIR 2020, Virtual Event, China, July 25-30, 2020
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Self-Supervised Reinforcement Learning for Recommender Systems.
Xin Xin|Alexandros Karatzoglou|Ioannis Arapakis|Joemon M. Jose
Proceedings of the 43rd International ACM SIGIR conference on research and development in Information Retrieval, SIGIR 2020, Virtual Event, China, July 25-30, 2020

2019

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A Simple Convolutional Generative Network for Next Item Recommendation.
Fajie Yuan|Alexandros Karatzoglou|Ioannis Arapakis|Joemon M. Jose|Xiangnan He
Proceedings of the Twelfth ACM International Conference on Web Search and Data Mining, WSDM 2019, Melbourne, VIC, Australia, February 11-15, 2019

2017

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Understanding and Leveraging the Impact of Response Latency on User Behaviour in Web Search.
Xiao Bai|Ioannis Arapakis|Berkant Barla Cambazoglu|Ana Freire
ACM Transactions on Information Systems (TOIS) 2017 Volume 36 Issue 2
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On the feasibility of predicting popular news at cold start.
Ioannis Arapakis|Berkant Barla Cambazoglu|Mounia Lalmas
Journal of the Association for Information Science and Technology (JASIST) 2017 Volume 68 Issue 5

2016

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The Role of Relevance in Sponsored Search.
Luca Maria Aiello|Ioannis Arapakis|Ricardo Baeza-Yates|Xiao Bai|Nicola Barbieri|Amin Mantrach|Fabrizio Silvestri
Proceedings of the 25th ACM International Conference on Information and Knowledge Management, CIKM 2016, Indianapolis, IN, USA, October 24-28, 2016
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Predicting User Engagement with Direct Displays Using Mouse Cursor Information.
Ioannis Arapakis|Luis A. Leiva
Proceedings of the 39th International ACM SIGIR conference on Research and Development in Information Retrieval, SIGIR 2016, Pisa, Italy, July 17-21, 2016

2015

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Know Your Onions: Understanding the User Experience with the Knowledge Module in Web Search.
Ioannis Arapakis|Luis A. Leiva|Berkant Barla Cambazoglu
Proceedings of the 24th ACM International Conference on Information and Knowledge Management, CIKM 2015, Melbourne, VIC, Australia, October 19 - 23, 2015
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Explanatory opinions: to whom or what is all the fuzz about?
Filipa Peleja|Ioannis Arapakis|João Magalhães
Sixth BCS-IRSG Symposium on Future Directions in Information Access, FDIA 2015, 31 August - 4 September 2015, Thessaloniki, Greece
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Unconscious Physiological Effects of Search Latency on Users and Their Click Behaviour.
Miguel Barreda-Ángeles|Ioannis Arapakis|Xiao Bai|Berkant Barla Cambazoglu|Alexandre Pereda-Baños
Proceedings of the 38th International ACM SIGIR Conference on Research and Development in Information Retrieval, Santiago, Chile, August 9-13, 2015

2014

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Automatically embedding newsworthy links to articles: From implementation to evaluation.
Ioannis Arapakis|Mounia Lalmas|Hakan Ceylan|Pinar Donmez
Journal of the Association for Information Science and Technology (JASIST) 2014 Volume 65 Issue 1
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User engagement in online News: Under the scope of sentiment, interest, affect, and gaze.
Ioannis Arapakis|Mounia Lalmas|Berkant Barla Cambazoglu|Mari-Carmen Marcos|Joemon M. Jose
Journal of the Association for Information Science and Technology (JASIST) 2014 Volume 65 Issue 10
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Understanding Within-Content Engagement through Pattern Analysis of Mouse Gestures.
Ioannis Arapakis|Mounia Lalmas|George Valkanas
Proceedings of the 23rd ACM International Conference on Conference on Information and Knowledge Management, CIKM 2014, Shanghai, China, November 3-7, 2014
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Impact of response latency on user behavior in web search.
Ioannis Arapakis|Xiao Bai|Berkant Barla Cambazoglu
The 37th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR '14, Gold Coast , QLD, Australia - July 06 - 11, 2014

2012

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Automatically embedding newsworthy links to articles.
Hakan Ceylan|Ioannis Arapakis|Pinar Donmez|Mounia Lalmas
21st ACM International Conference on Information and Knowledge Management, CIKM'12, Maui, HI, USA, October 29 - November 02, 2012

2011

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Theories, methods and current research on emotions in library and information science, information retrieval and human-computer interaction.
Irene Lopatovska|Ioannis Arapakis
Information Processing and Management 2011 Volume 47 Issue 4

2010

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A comparison of general vs personalised affective models for the prediction of topical relevance.
Ioannis Arapakis|Konstantinos Athanasakos|Joemon M. Jose
Proceeding of the 33rd International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2010, Geneva, Switzerland, July 19-23, 2010

2009

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Enriching user profiling with affective features for the improvement of a multimodal recommender system.
Ioannis Arapakis|Yashar Moshfeghi|Hideo Joho|Reede Ren|David Hannah|Joemon M. Jose
Proceedings of the 8th ACM International Conference on Image and Video Retrieval, CIVR 2009, Santorini Island, Greece, July 8-10, 2009
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Modeling facial expressions and peripheral physiological signals to predict topical relevance.
Ioannis Arapakis|Ioannis Konstas|Joemon M. Jose|Ioannis Kompatsiaris
Proceedings of the 32nd Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2009, Boston, MA, USA, July 19-23, 2009

2008

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Affective feedback: an investigation into the role of emotions in the information seeking process.
Ranieri Baraglia|Ioannis Arapakis|Ranieri Baraglia|Ioannis Arapakis
Proceedings of the 31st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2008, Singapore, July 20-24, 2008
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Affective feedback: an investigation into the role of emotions in the information seeking process.
Ioannis Arapakis|Joemon M. Jose|Philip D. Gray
Proceedings of the 31st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2008, Singapore, July 20-24, 2008