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David J. DeWitt is the John P. Morgridge Professor (Emeritus) of (Computer Sciences ) at the University of Wisconsin–Madison. Professor DeWitt received a B.A. degree from Colgate University in 1970, and a Ph.D. from the University of Michigan in 1976. He then joined the University of Wisconsin-Madison and started the Wisconsin Database Group, which he led for more than 30 years. Professor DeWitt is known for his research in the areas of parallel databases, benchmarking, object-oriented databases, and XML databases. He is an elected member of the National Academy of Engineering (1998),〔(【引用サイトリンク】title=NAE Members Directory - Dr. David J. DeWitt )〕 and a Fellow of the Association for Computing Machinery. He received the ACM SIGMOD Innovations Award (now renamed SIGMOD Edgar F. Codd Innovations Award) in 1995 for his contributions to the database systems field. In 2009, ACM recognized the seminal contributions of his Gamma parallel database system project with the ACM Software System Award. Also in 2009, he received the IEEE Emanuel R. Piore Award for his contributions to the database systems field.〔(【引用サイトリンク】title=IEEE Emanuel R. Piore Award Recipients )〕 Currently, he is a Technical Fellow at Microsoft, leading the Microsoft Jim Gray Systems Lab at Madison, Wisconsin. ==The "DeWitt Clause"== Several commercial database vendors include an end-user license agreement provision, known as the ''DeWitt Clause'', that prohibits researchers and scientists from explicitly using the names of their systems in academic papers.〔 〕 In essence, a DeWitt Clause forbids the publication of database benchmarks that the database vendor has not sanctioned. The original DeWitt Clause was established by Oracle at the behest of Larry Ellison. Ellison was displeased with a benchmark study done by David DeWitt in 1982, then just an assistant professor, using his new Wisconsin Benchmark, which showed that Oracle's system had poor performance.〔 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「David DeWitt」の詳細全文を読む スポンサード リンク
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