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Date: Thu, 07 Nov 1996 19:09:35 GMTServer: NCSA/1.5Content-type: text/htmlLast-modified: Mon, 14 Oct 1996 20:22:42 GMTContent-length: 4109<HTML><HEAD><TITLE> Home Page of David J. DeWitt </TITLE></HEAD><BODY><H1> <!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><IMG ALIGN=MIDDLE SRC="http://www.cs.wisc.edu/~pubs/faculty-info/dewitt.gif">David J. DeWitt </H1><BLOCKQUOTE> Professor and Romnes Fellow <BR> <BR> Computer Sciences Department <BR> University of Wisconsin <BR> 1210 W. Dayton St. <BR> Madison, WI 53706-1685 <BR> <BR> Telephone: (608) 262-1204 <BR> Fax: (608) 262-9777 <BR> Email: dewitt@cs.wisc.edu <BR></BLOCKQUOTE><EM>Ph.D., University of Michigan, 1976</EM> <BR><EM>Interests:</EM>Object oriented database systems, parallel database systems, databasebenchmarking, geographic information systems <P><HR><H2> Research Summary </H2>My two main research projects are SHORE and Paradise. The objectiveof SHORE is to design, implement, and evaluate a persistent objectsystem that will serve the needs of a wide variety of target applicationsincluding hardware and software CAD systems, persistent programminglanguages, geographic information systems, satellite data repositories,and multimedia applications. SHORE expands on the basic capabilitiesof the widely-used Exodus Storage Manager (developed at Wisconsin,funded by ARPA) in a number of ways including support for typedobjects, multiple programming languages, a `Unix-like' hierarchicalname space for named objects, and a Unix-compatible interfaceto objects with a `text' field. This interface is intended toease the transition of applications from the Unix file systemenvironment to SHORE as existing Unix tools such as vi and ccwill be able to store their data in SHORE objects without modification(basically a Unix file becomes either a single SHORE object orthe text field of a complex object). SHORE is being targeted ata wide range of hardware environments, scaling all the way fromindividual workstations to heterogeneous client/server networksto large multiprocessors such as the Intel Paragon. SHORE is ajoint project with Profs. Carey, Naughton, and Solomon. <P>The Paradise project is attempting to apply the technology developedas part of the SHORE and Gamma projects (Gamma is a parallel relationaldatabase system developed at the University of Wisconsin) to thetask of storing and manipulating geographic data sets. Currently,many geographic information systems (GIS) use relational databasesystems to hold their data. While such systems are excellent formanaging business data they are a poor match for the modelingneeds of a GIS which must be capable of storing and manipulatingmuch more complex objects such as polygons and polylines. Instead,Paradise employs an object-oriented data model, providing a muchbetter match to the type needs of a GIS. Another significant differencefrom current GIS systems is that Paradise employs parallelismto facilitate executing and processing large data sets such assatellite images. The target hardware platform for the projectis a cluster of 64 Sparc 20s connected with ATM. <P><H2> Sample Recent Publications </H2><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><A HREF="ftp://ftp.cs.wisc.edu/oo7/"> The OO7 benchmark</A> (withM. Carey and J. Naughton), <EM>Proceedings of the SIGMOD Conference</EM>,Washington, DC, May, 1993. <P> <!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><A HREF="http://www.cs.wisc.edu/shore/"> Shoring up persistentapplications</A> (with D. DeWitt, M. Franklin, N. Hall, M. McAuliffe,J. Naughton, D. S chuh, C. Tan, O. Tsatalos, S. White, and M.Zwilling), <EM>Proceedings of the ACM SIGMOD International Conferenceon Management of Data</EM>, Minneapolis, MN, May, 1994. <P> <!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><A HREF="http://www.cs.wisc.edu/paradise/"> Client-server Paradise</A>(with N. Kabra, J. Luo, J. Patel, and J. Yu), <EM>Proceedingsof the Very Large Data Base Conference</EM>, Santiego, Chile,August, 1994. <P> <H2> Recent Talks </H2><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><A HREF="http://www.cs.wisc.edu/~dewitt/vldb95.ps"> VLDB 95 Invited Talk</A> <P><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><A HREF="http://www.cs.wisc.edu/~dewitt/vldbsum.ps"> 1996 Object-Relational Summit Presentation</A> <P><HR><ADDRESS> This page was automatically created January 18, 1995.<BR> Email <CODE>pubs@cs.wisc.edu</CODE> to report errors.</ADDRESS><HR></BODY></HTML>?? 快捷鍵說(shuō)明
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