Rikiya Takehi

2026

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Diversification as Risk Minimization.
Rikiya Takehi|Fernando Diaz|Tetsuya Sakai
Proceedings of the Nineteenth ACM International Conference on Web Search and Data Mining, WSDM 2026, Boise, ID, USA, February 22-26, 2026

2025

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Open-Source LLM-based Relevance Assessment vs. Highly Reliable Manual Relevance Assessment: A Case Study.
Tetsuya Sakai|Khant Myoe Rain|Rikiya Takehi|Sijie Tao|Young-In Song
Proceedings of the 34th ACM International Conference on Information and Knowledge Management, CIKM 2025, Seoul, Republic of Korea, November 10-14, 2025
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LLM-Assisted Relevance Assessments: When Should We Ask LLMs for Help?
Rikiya Takehi|Ellen M. Voorhees|Tetsuya Sakai|Ian Soboroff
Proceedings of the 48th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2025, Padua, Italy, July 13-18, 2025