• A. Iyengar is with the IBM T.J. Watson Research Center, PO Box 704, Yorktown Heights, New York. E-mail: email@example.com.
• D. De Roure is with the Department of Electronics and Computer Science, University of Southampton, Southampton, United Kingdom.
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Arun K. Iyengar received the PhD degree in computer science from the Massachusetts Institute of Technology. He does research and development into Web performance, caching, storage allocation, and distributed computing at the IBM T.J. Watson Research Center. His work has improved performance at some of the most highly accessed Web sites hosted by IBM, and has been incorporated into several products including IBM's Websphere. He is the National Delegate representing the IEEE Computer Society to IFIP Technical Committee 6 on Communication Systems, the Chair of IFIP Working Group 6.4 on Internet Applications Engineering, and the Chair of the IEEE Computer Society's Technical Committee on the Internet. He has also earned the distinction of IBM Master Inventor. Dr. Iyengar was program cochair for the 2002 International World Wide Web Conference.
David De Roure received the PhD degree in computer science from the University of Southampton in 1990. He is a professor of computer science in the Department of Electronics and Computer Science at the University of Southampton, United Kingdom, where he is head of the Grid and Pervasive Computing research group. Professor De Roure has worked for many years with distributed information systems and has been active in the hypertext, multimedia, agent-based computing, and distributed computing communities. He is a member of the Advisory Committee of the World Wide Web Consortium and is involved in current activities including the OWL Web Ontology Language. His current research focus is the application of advanced knowledge technologies to distributed systems; his projects focus on semantic grid, knowledgeable devices, and the pervasive knowledge fabric. He is chair of the Semantic Grid Research Group in the Global Grid Forum.