@harrieo.bsky.social
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.
Informagus @ SIGIR 2025 Sunday: Heydar (doctoral consortium) Monday: Djoerd (short paper), Daria & Arjen (short paper), Santiago & Harrie et al. (short paper), etc., etc.
Colleague @harrieo.bsky.social made this impressive poster of all Radboud U. contributions to #SIGIR2025
11.07.2025 11:14 — 👍 4 🔁 3 💬 0 📌 0
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…
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! 😎 ☀️ 🇮🇹
Rethinking Click Models in Light of Carousel Interfaces: Theory-Based Categorization and Design of Click Models
Jingwei Kang, Maarten de Rijke, Santiago de Leon-Martinez, Harrie Oosterhuis
arxiv.org/abs/2506.18548
Presentation: Friday 18 July 11:55 - ICTIR’25 Oral Presentations
🧵 6/6
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
arxiv.org/abs/2507.04820
Presentation: Thursday 17 July 14:15 - ReNeuIR25 Paper Session
🧵 5/6
Adaptive Orchestration of Modular Generative Information Access Systems
Mohanna Hoveyda, Harrie Oosterhuis, Arjen P. de Vries, Maarten de Rijke, Faegheh Hasibi
arxiv.org/abs/2504.17454
Code: github.com/informagi/AQA
Presentation: Wednesday 16 July 12:15 - Perspectives 1
🧵 4/6
Learning to Rank with Variable Result Presentation Lengths
Norman Knyazev, Harrie Oosterhuis
arxiv.org/abs/2506.23319
Code: github.com/NKNY/varlenr...
Presentation: Wednesday 16 July 10:30 - Reranking
🧵 3/6
Optimizing Compound Retrieval Systems
Harrie Oosterhuis, Rolf Jagerman, Zhen Qin, Xuanhui Wang
arxiv.org/abs/2504.12063
Code: github.com/google-deepm...
Presentation: Tuesday 15 July 11:15 - Search and Ranking 1
🧵 2/6
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
arxiv.org/abs/2504.20792
Monday 14 July 14:00 - Resource Papers Posters 1
🧵 1/6
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
#DIR2025, the 22nd Dutch-Belgian Information Retrieval workshop will take place at Radboud University Nijmegen on 27 October 2025!
https://informagus.nl/dir2025/
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.
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
https://arxiv.org/abs/2504.20792
Mohanna Hoveyda, Harrie Oosterhuis, Arjen P. de Vries, Maarten de Rijke, Faegheh Hasibi
Adaptive Orchestration of Modular Generative Information Access Systems
https://arxiv.org/abs/2504.17454
Harrie Oosterhuis, Rolf Jagerman, Zhen Qin, Xuanhui Wang
Optimizing Compound Retrieval Systems
https://arxiv.org/abs/2504.12063
I'm looking forward to reading this, Bhaskar!
12.03.2025 18:47 — 👍 3 🔁 0 💬 1 📌 0Those damn aliens are always so hard to reach! 👽
28.01.2025 13:07 — 👍 1 🔁 0 💬 0 📌 0
My colleagues published about pairwise relevance labeling this last year (and even earlier on arXiv):
aclanthology.org/2024.finding...
Why I personally think it works better, mainly because it's hard to calibrate a pointwise relevance prediction, but a pairwise prediction hardly needs calibration.