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    • Daichi Imamori, Keishi Tajima,

    Predicting Popularity of Twitter Accounts through the Discovery of Link-Propagating Early Adopters

    Proc. of 25th ACM International Conference on Information and Knowledge Management,
    pp.639-648, ACM Press, October 2016 (ACM DL)

    Hikaru Takemura, Keishi Tajima,

    Classification of Twitter Accounts into Targeting Accounts and Non-Targeting Accounts

    Proc. of 27th ACM Conference on Hypertext and Social Media,
    pp. 291-296, ACM Press, July 2016 (ACM DL)

    Tomohiro Manabe, Keishi Tajima,

    Subtopic Ranking Based on Hierarchical Headings

    Proc. of 12th International Conference on Web Information Systems and Technologies,
    Vol.2, pp. 121-130, SciTePress, April 2016 (SciTePress Digital Library)

    Tomohiro Manabe, Keishi Tajima,

    Heading-Aware Proximity Measure and Its Application to Web Search

    DBSJ Journal, Vol.14, Article No.2,
    pp.1-6, March 2016

    Ming Li, Keishi Tajima,

    Automatic Generation of Authentication Questions from Private Messages

    Proc. of IEEE/WIC/ACM International Conferences on Web Intelligence and Intelligent Agent Technologies,
    pp.505-510, IEEE Computer Society Press, December 2015 (IEEE Xplore, IEEE CS DL)

    Tomohiro Manabe, Keishi Tajima,

    Heading-Aware Snippet Generation for Web Search

    Proc. of 11th Asia Information Retrieval Societies Conference,
    Lecture Notes in Computer Science, Vol. 9460,
    pp. 188-200, Springer-Verlag, Decembr 2015

    Tomohiro Manabe, Keishi Tajima,

    Extracting Logical Hierarchical Structure of HTML Documents Based on Headings

    Proc. of VLDB, Vol.8, No.12,
    pp.1606-1617, August 2015

    Hikaru Takemura, Atsushi Tanaka, Keishi Tajima,

    Classification of Twitter Follow Links Based on the Followers’ Intention

    Proc. of 30th ACM Symposium on Applied Computing,
    pp. 1174-1180, ACM Press, April 2015 (ACM DL)

    Atsushi Tanaka, Hikaru Takemura, Keishi Tajima,

    Why You Follow: A Classification Scheme for Twitter Follow Links

    Proc. of 25th ACM Conference on Hypertext and Hypermedia,
    pp. 324-326, ACM Press, September 2014 (ACM DL)

    Xiaoqi Zhao, Keishi Tajima,

    Online Retweet Recommendation with Item Count Limits

    Proc. of IEEE/WIC/ACM International Joint Conferences on Web Intelligence and Intelligent Agent Technologies,
    pp.282-289, IEEE Computer Society Press, August 2014 (IEEE Xplore, ACM DL)

    Keishi Tajima,

    Schemaless Semistructured Data Revisited –Reinventing Peter Buneman’s Deterministic Semistructured Data Model–

    In Search of Elegance in the Theory and Practice of Computation – Essays Dedicated to Peter Buneman,
    Lecture Notes in Computer Science, Vol. 8000,
    pp. 466-482, Springer-Verlag, October 2013

    大西 洋, 田島 敬史,

    「語の出現の偏りに基づく新たな隠語の発見」

    日本データベース学会論文誌, Vol. 12, No. 1,
    pp. 49-54, June 2013

    Hikaru Takemura, Keishi Tajima,

    Tweet Classification Based on Their Lifetime Duration

    Proc. of 21st ACM International Conference on Information and Knowledge Management,
    pp. 2367-2370, ACM Press, October 2012 (ACM DL)

    Masahiro Inoue, Keishi Tajima,

    Noise Robust Detection of the Emergence and Spread of Topics on the Web

    Proc. of 2nd Temporal Web Analytics Workshop (in conj. with WWW Conf.),
    pp. 9-16, ACM Press, April 2012 (ACM DL)

    Atsuyuki Morishima, Keishi Tajima, Masateru Tadaishi

    Optimal Tree Node Ordering for Child/Descendant Navigations

    Proc. of 26th IEEE International Conference on Data Engineering,
    pp. 840-843, IEEE Computer Society Press, March 2010 (IEEE Xplore, IEEE CS DL)