2022

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Do Extractive Summarization Algorithms Amplify Lexical Bias in News Articles?
Rei Shimizu | Sumio Fujita | Tetsuya Sakai
ICTIR '22: The 2022 ACM SIGIR International Conference on the Theory of Information Retrieval, Madrid, Spain, July 11 - 12, 2022

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Selectively Expanding Queries and Documents for News Background Linking
Lirong Zhang | Hideo Joho | Sumio Fujita | Haitao Yu
Proceedings of the 31st ACM International Conference on Information & Knowledge Management, Atlanta, GA, USA, October 17-21, 2022

2021

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How Do Users Revise Zero-Hit Product Search Queries?
Yuki Amemiya | Tomohiro Manabe | Sumio Fujita | Tetsuya Sakai
Advances in Information Retrieval - 43rd European Conference on IR Research, ECIR 2021, Virtual Event, March 28 - April 1, 2021, Proceedings, Part II

2020

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Automatic Evaluation of Iconic Image Retrieval based on Colour, Shape, and Texture
Riku Togashi | Sumio Fujita | Tetsuya Sakai
Proceedings of the 2020 on International Conference on Multimedia Retrieval, ICMR 2020, Dublin, Ireland, June 8-11, 2020

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What Rankers Can be Statistically Distinguished in Multileaved Comparisons?
Makoto P. Kato | Akiomi Nishida | Tomohiro Manabe | Sumio Fujita | Takehiro Yamamoto
CIKM '20: The 29th ACM International Conference on Information and Knowledge Management, Virtual Event, Ireland, October 19-23, 2020

2019

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Online Evaluations of Features and Ranking Models for Question Retrieval
Tomohiro Manabe | Sumio Fujita | Akiomi Nishida
NII Testbeds and Community for Information Access Research - 14th International Conference, NTCIR 2019, Tokyo, Japan, June 10-13, 2019, Revised Selected Papers

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Final Report of the NTCIR-14 OpenLiveQ-2 Task
Makoto P. Kato | Akiomi Nishida | Tomohiro Manabe | Sumio Fujita | Takehiro Yamamoto
NII Testbeds and Community for Information Access Research - 14th International Conference, NTCIR 2019, Tokyo, Japan, June 10-13, 2019, Revised Selected Papers

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Arc Loss: Softmax with Additive Angular Margin for Answer Retrieval
Rikiya Suzuki | Sumio Fujita | Tetsuya Sakai
Information Retrieval Technology - 15th Asia Information Retrieval Societies Conference, AIRS 2019, Hong Kong, November 7-9, 2019, Proceedings

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Unsupervised Answer Retrieval with Data Fusion for Community Question Answering
Sosuke Kato | Toru Shimizu | Sumio Fujita | Tetsuya Sakai
Information Retrieval Technology - 15th Asia Information Retrieval Societies Conference, AIRS 2019, Hong Kong, November 7-9, 2019, Proceedings

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Towards Automatic Evaluation of Reused Answers in Community Question Answering
Hsin Wen Liu | Sumio Fujita | Tetsuya Sakai
Information Retrieval Technology - 15th Asia Information Retrieval Societies Conference, AIRS 2019, Hong Kong, November 7-9, 2019, Proceedings

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Adapting Visual Question Answering Models for Enhancing Multimodal Community Q&A Platforms
Avikalp Srivastava | Hsin Wen Liu | Sumio Fujita
Proceedings of the 28th ACM International Conference on Information and Knowledge Management, CIKM 2019, Beijing, China, November 3-7, 2019

2018

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Classifying Community QA Questions That Contain an Image
Kenta Tamaki | Riku Togashi | Sosuke Kato | Sumio Fujita | Hideyuki Maeda | Tetsuya Sakai
Proceedings of the 2018 ACM SIGIR International Conference on Theory of Information Retrieval, ICTIR 2018, Tianjin, China, September 14-17, 2018

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Challenges of Multileaved Comparison in Practice: Lessons from NTCIR-13 OpenLiveQ Task
Makoto P. Kato | Tomohiro Manabe | Sumio Fujita | Akiomi Nishida | Takehiro Yamamoto
Proceedings of the 27th ACM International Conference on Information and Knowledge Management, CIKM 2018, Torino, Italy, October 22-26, 2018

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Exploring People's Attitudes and Behaviors Toward Careful Information Seeking in Web Search
Takehiro Yamamoto | Yusuke Yamamoto | Sumio Fujita
Proceedings of the 27th ACM International Conference on Information and Knowledge Management, CIKM 2018, Torino, Italy, October 22-26, 2018

2017

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YJRS at the NTCIR-13 OpenLiveQ Task
Tomohiro Manabe | Akiomi Nishida | Sumio Fujita
The 13th NTCIR Conference, Evaluation of Information Access Technologies, National Center of Sciences, Tokyo, Japan, December 5-8, 2017

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Overview of the NTCIR-13 OpenLiveQ Task
Makoto P. Kato | Takehiro Yamamoto | Tomohiro Manabe | Akiomi Nishida | Sumio Fujita
The 13th NTCIR Conference, Evaluation of Information Access Technologies, National Center of Sciences, Tokyo, Japan, December 5-8, 2017

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Mobile Vertical Ranking based on Preference Graphs
Yuta Kadotami | Yasuaki Yoshida | Sumio Fujita | Tetsuya Sakai
Proceedings of the ACM SIGIR International Conference on Theory of Information Retrieval, ICTIR 2017, Amsterdam, The Netherlands, October 1-4, 2017

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LSTM vs. BM25 for Open-domain QA: A Hands-on Comparison of Effectiveness and Efficiency
Sosuke Kato | Riku Togashi | Hideyuki Maeda | Sumio Fujita | Tetsuya Sakai
Proceedings of the 40th International ACM SIGIR Conference on Research and Development in Information Retrieval, Shinjuku, Tokyo, Japan, August 7-11, 2017

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A Comparative Live Evaluation of Multileaving Methods on a Commercial cQA Search
Tomohiro Manabe | Akiomi Nishida | Makoto P. Kato | Takehiro Yamamoto | Sumio Fujita
Proceedings of the 40th International ACM SIGIR Conference on Research and Development in Information Retrieval, Shinjuku, Tokyo, Japan, August 7-11, 2017

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Euclidean Image Embedding in view of Similarity Ranking in Auction Search by Image
Riku Togashi | Hideyuki Maeda | Vibhor Kanojia | Kousuke Morimoto | Sumio Fujita
Proceedings of the 26th International Conference on World Wide Web Companion, Perth, Australia, April 3-7, 2017

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Enhancing Knowledge Graph Embedding with Probabilistic Negative Sampling
Vibhor Kanojia | Hideyuki Maeda | Riku Togashi | Sumio Fujita
Proceedings of the 26th International Conference on World Wide Web Companion, Perth, Australia, April 3-7, 2017

2016

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Extracting Search Query Patterns via the Pairwise Coupled Topic Model
Takuya Konishi | Takuya Ohwa | Sumio Fujita | Kazushi Ikeda | Kohei Hayashi
Proceedings of the Ninth ACM International Conference on Web Search and Data Mining, San Francisco, CA, USA, February 22-25, 2016

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YJST at the NTCIR-12 MobileClick-2 Task
Yuya Ozawa | Taichi Yatsuka | Sumio Fujita
Proceedings of the 12th NTCIR Conference on Evaluation of Information Access Technologies, National Center of Sciences, Tokyo, Japan, June 7-10, 2016

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YJST at the NTCIR-12 IMine-2 Task
Yasuaki Yoshida | Hideyuki Maeda | Tatsuhiro Niwa | Sumio Fujita
Proceedings of the 12th NTCIR Conference on Evaluation of Information Access Technologies, National Center of Sciences, Tokyo, Japan, June 7-10, 2016

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Overview of the NTCIR-12 MobileClick-2 Task
Makoto P. Kato | Tetsuya Sakai | Takehiro Yamamoto | Virgil Pavlu | Hajime Morita | Sumio Fujita
Proceedings of the 12th NTCIR Conference on Evaluation of Information Access Technologies, National Center of Sciences, Tokyo, Japan, June 7-10, 2016

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Overview of the NTCIR-12 IMine-2 Task
Takehiro Yamamoto | Yiqun Liu | Min Zhang | Zhicheng Dou | Ke Zhou | Ilya Markov | Makoto P. Kato | Hiroaki Ohshima | Sumio Fujita
Proceedings of the 12th NTCIR Conference on Evaluation of Information Access Technologies, National Center of Sciences, Tokyo, Japan, June 7-10, 2016

2012

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Semantics of query rewriting patterns in search logs
Sumio Fujita | Georges Dupret | Ricardo Baeza-Yates
Proceedings of the Fifth workshop on Exploiting Semantic Annotations in Information Retrieval, ESAIR 2012, Maui, HI, USA, October 28, 2012

2010

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Using Related Queries to Improve Web Search Results Ranking
Georges Dupret | Ricardo Zilleruelo-Ramos | Sumio Fujita
String Processing and Information Retrieval - 17th International Symposium, SPIRE 2010, Los Cabos, Mexico, October 11-13, 2010. Proceedings

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Click-graph modeling for facet attribute estimation of web search queries
Sumio Fujita | Keigo Machinaga | Georges Dupret
Recherche d'Information Assistée par Ordinateur, RIAO 2010: Adaptivity, Personalization and Fusion of Heterogeneous Information, 9th International Conference, Bibliotheque Nationale de France, Paris, France, April 28-30, 2010, Proceedings

2009

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Retrieval parameter optimization using genetic algorithms
Sumio Fujita
2009 Volume 45 Issue 6

2007

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Technology survey and invalidity search: A comparative study of different tasks for Japanese patent document retrieval
Sumio Fujita
2007 Volume 43 Issue 5

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NTCIR-6 CLIR-J-J Experiments at Yahoo! Japan
Sumio Fujita
Proceedings of the 6th NTCIR Workshop Meeting on Evaluation of Information Access Technologies: Information Retrieval, Question Answering and Cross-Lingual Information Access, NTCIR-6, National Center of Sciences, Tokyo, Japan, May 15-18, 2007

2005

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NTCIR-2 as a Rosetta stone in laboratory experiments of IR systems
Sumio Fujita
2005 Volume 41 Issue 3

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A Decade after TREC-4 - NTCIR-5 CLIR-J-J Experiments at Yahoo!Japan
Sumio Fujita
Proceedings of the Fifth NTCIR Workshop Meeting on Evaluation of Information Access Technologies: Information Retrieval, Question Answering and Cross-Lingual Information Access, NTCIR-5, National Center of Sciences, Tokyo, Japan, December 6-9, 2005

2004

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Revisiting Document Length Hypotheses: NTCIR-4 CLIR and Patent Experiments at Patolis
Sumio Fujita
Proceedings of the Fourth NTCIR Workshop on Research in Information Access Technologies Information Retrieval, Question Answering and Summarization, NTCIR-4, National Center of Sciences, Tokyo, Japan, June 2-4, 2004

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Revisiting Again Document Length Hypotheses TREC 2004 Genomics Track Experiments at Patolis
Sumio Fujita
Proceedings of the Thirteenth Text REtrieval Conference, TREC 2004, Gaithersburg, Maryland, USA, November 16-19, 2004

2001

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Notes on the Limits of CLIR Effectiveness: NTCIR-2 Evaluation Experiments at Justsystem
Sumio Fujita
Proceedings of the Third Second Workshop Meeting on Evaluation of Chinese & Japanese Text Retrieval and Text Summarization, NTCIR-2, Tokyo, Japan, March 7-9, 2001

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More Reflections on "Aboutness" TREC-2001 Evaluation Experiments at Justsystem
Sumio Fujita
Proceedings of The Tenth Text REtrieval Conference, TREC 2001, Gaithersburg, Maryland, USA, November 13-16, 2001

2000

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Reflections on "Aboutness" TREC-9 Evaluation Experiments at Justsystem
Sumio Fujita
Proceedings of The Ninth Text REtrieval Conference, TREC 2000, Gaithersburg, Maryland, USA, November 13-16, 2000

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Evaluation of Japanese Phrasal Indexing with Large Test Collection
Sumio Fujita
Computer-Assisted Information Retrieval (Recherche d'Information et ses Applications) - RIAO 2000, 6th International Conference, College de France, France, April 12-14, 2000. Proceedings

1999

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Notes on Phrasal Indexing: JSCB Evaluation Experiments at NTCIR AD HOC
Sumio Fujita
Proceedings of the First NTCIR Workshop on Research in Japanese Text Retrieval and Term Recognition, NTCIR-1, Tokyo, Japan, August 30 - September 1, 1999

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