Keishi Tajima

2025

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Revenue maximization in campaigns with a viral-driven presale and a conformity-driven sales phase.
Tianyou Gao|Keishi Tajima
World Wide Web (WWW) 2025 Volume 28 Issue 6

2024

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An Adaptive Feature Selection Method for Learning-to-Enumerate Problem.
Satoshi Horikawa|Chiyonosuke Nemoto|Keishi Tajima|Masaki Matsubara|Atsuyuki Morishima
Advances in Information Retrieval - 46th European Conference on Information Retrieval, ECIR 2024, Glasgow, UK, March 24-28, 2024, Proceedings, Part III
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Content-Based Exclusion Queries in Keyword-Based Image Retrieval.
Eisaku Yoshikawa|Keishi Tajima
Proceedings of the 2024 International Conference on Multimedia Retrieval, ICMR 2024, Phuket, Thailand, June 10-14, 2024
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Automatic Construction of Expiration Time Expression Dataset from Retweets.
Hirotaka Nagashima|Keishi Tajima
Companion Proceedings of the ACM on Web Conference 2024, WWW 2024, Singapore, Singapore, May 13-17, 2024

2019

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Improving Multiclass Classification in Crowdsourcing by Using Hierarchical Schemes.
Xiaoni Duan|Keishi Tajima
The World Wide Web Conference, WWW 2019, San Francisco, CA, USA, May 13-17, 2019

2018

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Efficient Pipeline Processing of Crowdsourcing Workflows.
Mark Schildhauer|Ken Mizusawa|Keishi Tajima|Masaki Matsubara|Mark Schildhauer|Ken Mizusawa|Toshiyuki Amagasa|Atsuyuki Morishima
Proceedings of the 27th ACM International Conference on Information and Knowledge Management, CIKM 2018, Torino, Italy, October 22-26, 2018

2016

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Predicting Popularity of Twitter Accounts through the Discovery of Link-Propagating Early Adopters.
Daichi Imamori|Keishi Tajima
Proceedings of the 25th ACM International Conference on Information and Knowledge Management, CIKM 2016, Indianapolis, IN, USA, October 24-28, 2016

2015

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Heading-Aware Snippet Generation for Web Search.
Tomohiro Manabe|Keishi Tajima
Information Retrieval Technology - 11th Asia Information Retrieval Societies Conference, AIRS 2015, Brisbane, QLD, Australia, December 2-4, 2015. Proceedings

2012

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Tweet classification based on their lifetime duration.
Hikaru Takemura|Keishi Tajima
21st ACM International Conference on Information and Knowledge Management, CIKM'12, Maui, HI, USA, October 29 - November 02, 2012
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Noise robust detection of the emergence and spread of topics on the web.
Masahiro Inoue|Keishi Tajima
2nd Temporal Web Analytics Workshop, TempWeb '12, Lyon, France, April 16-17, 2012

2005

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Incremental evaluation of a monotone XPath fragment.
Hidetaka Matsumura|Keishi Tajima
Proceedings of the 2005 ACM CIKM International Conference on Information and Knowledge Management, Bremen, Germany, October 31 - November 5, 2005