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The University of Electro-Communications  Graduate School of Informatics and Engineering, School of Informatics and Engineering  "Department of Computer and Network Engineering, Cluster I （Informatics and Computer Engineering)"

Professor  OHMORI Tadashi  Year of birth:1962   Personal website

■ Career Graduate school of Information Systems, Univ. Electro-Communications  Professor  2010/04/01-Present    ■ Academic background The University of Tokyo  Graduate School, Division of Engineering  Information Engineering Course  Doctoral program  1990/03  Completed  The University of Tokyo  Graduate School, Division of Engineering  Information Engineering Course  Master's program  1987/03  Completed  The University of Tokyo  Faculty of Engineering  Dept. Electrical Engineering  1985/03  Graduated    ■ Academic degrees Doctor of Engineering  The University of Tokyo  1990/03    ■ Outlines of current research data engineering and algorithmic issues for new ability, concepts, realization of new data-intensive platform systems.    ■ Classes responsible within the university 2019  Principles of Database Engineering 2  Spring semester  Both graduate schools, IE and IS  Master's and doctoral programs  2019  Algorithms 1  Fall semester  Undergraduate, daytime  2019  Computer Systems Fundamental  Fall semester  Undergraduate, mainly nighttime  2019  総合コミュニケーション科学  Spring semester  Undergraduate, daytime  2019  データベース（全学社会人特別履修プログラム・夜間）  Spring semester  Graduate, IE  View details...   ■ Current research areas Multimedia database  Theory of informatics  Computer system  Software    ■ Research keywords New Query Ability and Algorithmic issues in Data Engineering  Algorithms, Concepts, and System algorithms for New Data-Platform Systems  Algorithmic issues of New Query Ability and Information Extraction from Massive Data, as well as new index, concurrency, distributed execution.  spatio-temporal data    ■ Current research subjects New query/information-extraction ability in data engineering: design, algorithms, implementation.  1987/04-Present  New algorithms and system issues in new data platform systems, consistency and concurrency issues.  1990/03-Present  information extraction through new search abilities over real-world spatial data  information extraction, spatio-temporal data.  2015/04/01-Present  m-closest keyword search over spatial datasets and its extension towards a new spatial search engine.  Simulation of Multi-Agent Systems by using Very Large Database.  1994/04-1998/03  A Study on a Multi-Dimensional Web-Structure Mining System on a basis of a Multi-Dimensional Data-Cube Model.  2005/04-2012/03  (科研基盤Ｃ）  A Study on Models and Algorithms for Massive Log Data Analysis  系列データ, 情報構造抽出．  2005/04-2007/03  (科研基盤Ｃ)  A Study on Keyword Search over Structured Data and Graph Databases  keyword search, hybrid XML-Relational database, Graph database, graph enumeration algorithms  2008/04-2011/03    ■ Published books Book, translated  J.Gray, A.Reuter,"Transaction Processing: the concept and techniques", MorganKaufmann Pub.  M.Kitsuregawa, Tadashi Ohmori, and 7 translators  Nikkei BP  277-452  2001  Book, dictionary  Handbook of Artificial Intelligence  Masaru KITSUREGAWA, Tadashi OHMORI  Japan Society of Artificial Intelligence  1990  View details...   ■ Published papers Paper  Yes  Utilizing Block Partitioning and Hash-Join in L2AP Similarity-Join Method  Joint  R.Yoshimura, T.Ohmori, T.Shintani, H.Fujita  Journal of DBSJ  Vol.17-J/ No.10, (8 pages)-  2019  Paper  Yes  スキップ探索を用いた不確実データからの頻出パターンの抽出  Joint  建島，新谷，大森，藤田  日本データベース学会和文論文誌  Vol.14/ Article No.6, 1-7  2016  2189-0374  Paper  Yes  A New Efficient Algorithm for m-Closest Spatial Keyword Search by using Priority Control and Tight Lower-Bound  Joint  Yuan Qiu, Tadashi Ohmori, Takahiko Shintani, Hideyuki Fujita  IEICE Transaction, Vol. D (to appear)  99-D/ 7, 638-651  2016/07  Paper  Yes  Design and Evaluation of the Database System IDPS-DB on the Intellectual Distributed Processing System IDPS  Shuji HARASHIMA, Tadashi OHMORI  Transactions of IEICE, Japan, Series D.  Vol.J96-D/ No.10, 2274-2285  2013/10  Paper  Yes  A Hybrid Hash Join Algorithm using Bucket Regrouping on MapReduce  Shigeo HIROSE, Tadashi OHMORI, Takahiko SHINTANI  Journal of the DBSJ  Vol.12/ No.1, 61-66  2013/06  View details...   ■ Research presentations Symposium  An Enhancement of Similarity-Join Algorithm L2AP by using Block Partitioning and Hash Join Techniques  DEIM 2018  No  Ryunosuke Yoshimua, Tadashi Ohmori，T.Shintani, H.Fujita  2018/03/05  URL  Symposium  位置・方向情報付写真群を用いた空間を要約する経路の作成  DEIMフォーラム2016  H5-4  No  相楽翔太，藤田秀之，大森匡，新谷隆彦  2016/03/01  Symposium  A New Search Strategy for m-Closest Keywords Query by using Dynamically-Created Grid-Partitioning over Spatial Datasets  Int'l Symposium on Cartoraphy in Internet and Ubquitous Environments 2015  Yes  Y.Qiu, H.Zhai, A.H.Dang, T.Ohmori, H.Fujita, T.Shintani  2015/03/18  Symposium  A New Load-Distribution Algorithm for Efficient Edit-Distance Join on MapReduce  DEIM2015  No  Atsuhito KONNO, Tadashi OHMORI, Takahiko SHINTANI  2015/03/03  Symposium  m-Closest Keyword Search over Spatial Data by using 2^n-split tree  DEIM 2013  No  Qiu, T.Ohmori, T.Shintani  2013/03  View details...   ■ Awards DEIM2016　優秀プレゼンテーション賞（主指導学生M2)  位置・方向情報付写真群を用いた空間を要約する経路の生成  2016/03/02  FIT session award  Efficiency improvement of mCK search problem by using recursive DCC strategy  2015/09/14  Session Presentation Award  A New Load-Distribution Algorithm of Efficient Edit-Distance Join over MapReduce platforms  2015/03/04  Student presentation award  A new algorithm of m-closest keywords query over spatial data  2014/03/13  Session Presentation Award  A New Hybrid-Hash Join Algorithm on MapReduce platforms by using Bucket Regrouping Strategy  2013/03/05  View details...   ■ Grants-in-aid for scientific research A Research on Efficient Algorithms for Creating information-Spaces on Massive-Data Systems.  "Scientific research (C), general"  2012/04/01-2016/03/31  A Study on Database Systems for Multi-Dimensional Web Mining  "Scientific research (C), general"  2009/04/01-2012/03/31  データ管理システムのログデータ分析方式に関する研究  "Scientific research (C), general"  2005/04/01-2007/03/31  View details...   ■ Past records of joint or funded research イベントデータの利用技術に関する研究  2001-2001  Research commissioned by a company  WEBマイニングに関する研究  2001-2001  Funded commissioned research  イベントログデータの利用技術に関する研究  2002-2002  Research commissioned by a company  イベントログデータの利用に関する研究  2003-2003  Research commissioned by a company  View details...   ■ Memberships of academic societies 電子情報通信学会  1987-Present  情報処理学会  1985-Present  IEICE Technical Committee of Data Engineering  1987-Present  ACM SIGMOD Japan Chapter  1998-Present  ACM  1998-Present  View details...   ■ Committee or council involvement DEIM(データ工学と情報マネジメントフォーラム）プログラム委員  DEIMプログラム編成委員  2013/03-Present  ACM SIGMOD Japan chapter  vice chief editor  2011/06-2015/06  Trans. IEICE of Japan, D division, editors of special issues on data engineering, 2008-2009.  論文誌データ工学特集号編集幹事  2008/05-2010/02  情報処理学会  データベースシステム研究会論文誌ＴＯＤ編集委員  2003/04-2011/03  ACM SIGMOD Japan Chapter  SIGMOD日本支部書記・幹事  1999-2002  View details...   ■ Committee activity in the University 情報・ネットワーク工学専攻コンピュータサイエンス（CS)プログラム長  プログラム長  2019/04-2020/03  IS進路委員会・委員長  委員長  2015/12-2016/12  IS教務委員会・改組対応教務委員会  委員  2015/04-2016/03  IS教務委員会（改組対応教務委員含む）  委員長（IS側）  2014/04-2015/03  IS入試委員会  委員長  2013/04-2014/03  View details...