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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 database researches and data engineering for new ability, concepts, realization of data-platform systems as well as new query-ability and information extraction from massive data    ■ Classes responsible within the university 2021  データ工学原論2  Spring semester  Both graduate schools, IE and IS  Master's and doctoral programs  2021  アルゴリズム論第一  Fall semester  Undergraduate, daytime  2021  計算機工学  Fall semester  Undergraduate, mainly nighttime  View details...   ■ Current research areas Multimedia database  Theory of informatics  Computer system  Software    ■ Research keywords New Query Ability and Algorithmic issues in Data Engineering  Concepts, ability and implementation algorithms for Data-Platform Systems and design  Design and algorithms of new query-power and information extraction from massive data, as well as index, concurrency, distributed execution.  data mining and data-driven applications from real-world data    ■ Current research subjects New query/information-extraction ability in data engineering: design, algorithms, implementation.  1987/04-Present  design, algorithms and system issues in new data platform systems, consistency and concurrency issues.  1990/03-Present  information extraction and data-driven applications over real-world data collections including spatial/temporal 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 Workshop  ネットワーク可視化のための拡大描画に適したエッジバンドリング手法  DEIM 2020 (データ工学と情報技術フォーラム）  H8-1  No  秋山，藤田，大森，新谷  2020/03  Workshop  An Enhancement of Similarity-Join Algorithm L2AP by using Block Partitioning and Hash Join Techniques  DEIM 2018  I6-2  No  Ryunosuke Yoshimua, Tadashi Ohmori，T.Shintani, H.Fujita  2018/03/05  URL  Workshop  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  Workshop  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  P2  Yes  Y.Qiu, H.Zhai, A.H.Dang, T.Ohmori, H.Fujita, T.Shintani  2015/03/18  Workshop  A New Load-Distribution Algorithm for Efficient Edit-Distance Join on MapReduce  DEIM2015  E7-6  No  Atsuhito KONNO, Tadashi OHMORI, Takahiko SHINTANI  2015/03/03  View details...   ■ Awards FIT session award  Embedding Point-Data Score in m-Closest Keyword Search Problem over Spatial Web  2020/09/01  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  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...