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Harrie Oosterhuis

@harrieo.bsky.social

130 followers 127 following 12 posts

Machine learning and information retrieval researcher. | Assistant professor at Radboud University Nijmegen and visiting research scholar at Google DeepMind. | Previously at Google Research, Twitter and University of Amsterdam.

Posts Replies Media

Reposted by Harrie Oosterhuis

Djoerd Hiemstra 🍉 @djoerd.idf.social.ap.brid.gy · 11/07/2025

Colleague @harrieo.bsky.social made this impressive poster of all Radboud U. contributions to #SIGIR2025

Informagus @ SIGIR 2025
Sunday: Heydar (doctoral consortium)
Monday: Djoerd (short paper), Daria & Arjen (short paper), Santiago & Harrie et al. (short paper), etc., etc.

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Harrie Oosterhuis @harrieo.bsky.social · 11/07/2025

If you are attending #SIGIR2025 and #ICTIR2025, come check out our research group's presentations! 😊 We have 14 presentations in total, with at least one every day. 😄 If you want to know more about our group, e.g., the meaning of the Informagus name 😁, do reach out to us. See you in Padua! 😎 ☀️ 🇮🇹

Informagus @ SIGIR & ICTIR 2025

Sunday July 13 – Tutorials and DC Consortium

Enhancing Knowledge Injection in Large Language Models for Efficient and Trustworthy Responses
Heydar Soudani
Doctoral Consortium Paper - 16:30 - Doctoral Consortium

Monday July 14 – Main Conference

Score-Fitted Indexes and Constant Length Indexes for Information Retrieval
Djoerd Hiemstra
Short Paper - 14:00 - Short Papers Posters 1
In a Few Words: Comparing Weak Supervision and LLMs for Short Query Intent Classification
Daria Alexander, Arjen P. de Vries
Short Paper - 14:00 - Short Papers Posters 1
RecGaze: The First Eye Tracking and User Interaction Dataset for Carousel Interfaces
Santiago de Leon-Martinez, Jingwei Kang, Robert Moro, Maarten de Rijke, Branislav Kveton, Harrie Oosterhuis, Maria Bielikova
Resource Paper - 14:00 - Resource Papers Posters 1

Tuesday July 15 – Main Conference

Optimizing Compound Retrieval Systems
Harrie Oosterhuis, Rolf Jagerman, Zhen Qin, Xuanhui Wang
Full Paper - 14:00 - Search and Ranking 1

Wednesday July 16 – Main Conference

Learning to Rank with Variable Result Presentation Lengths
Norman Knyazev, Harrie Oosterhuis
Full Paper - 10:30 - Reranking
Adaptive Orchestration of Modular Generative Information Access Systems
Mohanna Hoveyda, Harrie Oosterhuis, Arjen P. de Vries, Maarten de Rijke, Faegheh Hasibi
Perspectives Paper - 12:15 - Perspectives 1

Thursday July 17 – Workshops

On the Neural Hype and Improving Efficiency of Sparse Retrieval
Djoerd Hiemstra
Keynote - 10:30 - ReNeuIR’25 Workshop
Harnessing Pairwise Ranking Prompting Through Sample-Efficient Ranking Distillation
Junru Wu, Le Yan, Zhen Qin, Honglei Zhuang, Paul Suganthan G.C., Tianqi Liu, Zhe Dong, Xuanhui Wang, Harrie Oosterhuis
Workshop Paper - 14:15 - ReNeuIR’25 Workshop
An Axiomatic Examination of Uncertainty Estimation in RAG Systems
Heydar Soudani, Evangelos Kanoulas, Faegheh Hasibi
Workshop Paper - Time TBA - IR-RAG’25 Workshop
FACE: A Fine-grained Reference Free Evaluator for Co…

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Harrie Oosterhuis @harrieo.bsky.social · 08/07/2025

Next week, I'll be in Padua, Italy for #SIGIR25 & #ICTIR25. 🇮🇹🍝🍕🍷🍹☀️ SIGIR is one of my favourite conferences, so I'm very happy to have six co-authored works there, two of which I'll present myself. 😄 I'm looking forward to seeing many of you there! 🙂 Come check out our presentations! 🧵👇😄 0/6

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Reposted by Harrie Oosterhuis

Djoerd Hiemstra 🍉 @djoerd.idf.social.ap.brid.gy · 06/06/2025

#DIR2025, the 22nd Dutch-Belgian Information Retrieval workshop will take place at Radboud University Nijmegen on 27 October 2025! informagus.nl/dir2025

informagus.nl

DIR 2025

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Harrie Oosterhuis @harrieo.bsky.social · 16/05/2025

Very excited for the 4th edition of CONSEQUENCES at the RecSys 2025 conference! 😄 Check our our call for contributions below, and follow @consequencesrecsys.bsky.social for more info.

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Reposted by Harrie Oosterhuis

arxiv cs.IR @arxiv-cs-ir.bsky.social · 30/04/2025

Santiago de Leon-Martinez, Jingwei Kang, Robert Moro, Maarten de Rijke, Branislav Kveton, Harrie Oosterhuis, Maria Bielikova RecGaze: The First Eye Tracking and User Interaction Dataset for Carousel Interfaces arxiv.org/abs/2504.20792

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Reposted by Harrie Oosterhuis

arxiv cs.IR @arxiv-cs-ir.bsky.social · 25/04/2025

Mohanna Hoveyda, Harrie Oosterhuis, Arjen P. de Vries, Maarten de Rijke, Faegheh Hasibi Adaptive Orchestration of Modular Generative Information Access Systems arxiv.org/abs/2504.17454

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Reposted by Harrie Oosterhuis

arxiv cs.IR @arxiv-cs-ir.bsky.social · 17/04/2025

Harrie Oosterhuis, Rolf Jagerman, Zhen Qin, Xuanhui Wang Optimizing Compound Retrieval Systems arxiv.org/abs/2504.12063

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