1. Fengrong Li and Yoshiharu Ishikawa,
    “Using Materialized Views to Enhance a Traceable P2P Record Exchange Framework”,
    Journal of Advances in Information Technology, Vol. 2, No. 1, pp. 27-39, 2011.
  2. Machiko Toyoda, Yasushi Toyoda, Yoshiharu Ishikawa,
    “A Stream Algorithm for Subsequence Matching”,
    IEICE Transactions on Information and Systems, Vol. J94-D, No. 7, pp. 1058-1070, July 2011. (in Japanese)
  3. Xi Guo, Baihua Zheng, Yoshiharu Ishikawa, and Yunjun Gao,
    “Direction-Based Surrounder Queries for Mobile Recommendations”,
    The VLDB Journal, Vol. 20, No. 5, pp. 743-766, October 2011.
    – DOI: 10.1007/s00778-011-0241-y
  4. Machiko Toyoda, Yasushi Sakurai, Toru Kobayashi, and Yusuke Ichikawa,
    “Information Leak Detection on Terminal Operation Logs”,
    IPSJ Transactions on Databases, Vol. 4, No. 4, pp. 63-77, December 2011. (in Japanese)


  1. Akiyo Nadamoto, Yu Suzuki, Takeshi Abekawa,
    “Gist of a Thread in Social Network Services based on Credibility of Wikipedia”,
    The 44th Annual Hawaii International Conference on System Services (HICSS 2011), pp. 1-10, Hawaii, USA, January 2011.
    – DOI: 10.1109/HICSS.2011.213
  2. Xi Guo and Yoshiharu Ishikawa,
    “Multi-Objective Optimal Combination Queries”,
    Proceedings of 22nd International Conference on Database and Expert Systems (DEXA 2011), Part I, LNCS 6860, pp. 47-61, Tourouse, France, August-September 2011.
    – DOI: 10.1007/978-3-642-23088-2_4
  3. Kazuki Kodama, Tingting Dong, and Yoshiharu Ishikawa,
    “An Index Structure for Spatial Range Querying on Gaussian Distributions”,
    Proceedings of the Fifth International VLDB Workshop on Management of Uncertain Data (MUD 2011), pp. 1-7, Seattle, USA, August 2011.
  4. Fengrong Li and Yoshiharu Ishikawa,
    “Simulation Based Analysis for a Traceable P2P Record Exchange Framework”,
    Proceedings of 4th International Conference on Data Management in Grid and P2P Systems (Globe 2011, DEXA 2011 Workshop), LNCS 6864, pp. 49-60, Tourouse, France, September 2011.
    – DOI: 10.1007/978-3-642-22947-3_5
  5. Yu Suzuki and Akiyo Nadamoto,
    “Credibility Assessment using Wikipedia for Messages on Social Network Services”,
    The Ninth International Conference on Dependable, Autonomic and Secure Computing (DASC 2011), pp. 887-894, Sydney, Australia, December 2011.
    – DOI: 10.1109/DASC.2011.149


  1. Yoshiharu Ishikawa,
    “Adaptive Spatial Query Processing for Supporting Mobile Users’ Decisions”,
    The 3rd International Workshop on Mobile Information Retrieval for Future (MIRF2011), Tokyo, November 2011. (invited talk)
  2. Yoshiharu Ishikawa,
    “Adaptve Spatial Query Processing Based on Uncertain Location Information”,
    The 7th International Workshop on Databases in Networked Information Systems (DNIS 2011), LNCS 7108, p. 324, Aizu, Fukushima, December 2011. (invited talk)
    – DOI: 10.1007/978-3-642-25731-5_25