Biographical sketches of authors

David E. Johnson   IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598 (electronic mail: dejohns@us.ibm.com). Dr. Johnson is a research staff member at IBM's Watson Research Center, where he manages the computational linguistics and text mining group. His research interests include natural language processing, the syntax and semantics of natural language, and the foundations of linguistic theory. He holds a Ph.D. degree in theoretical linguistics from the University of Illinois at Urbana-Champaign, is a past president of the Association for the Mathematics of Language, and serves on several editorial boards.

Frank J. Oles   IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598 (electronic mail: oles@us.ibm.com). Dr. Oles has been a research staff member at the IBM Watson Research Center since 1983. He has a Ph.D. degree in computer and information science from Syracuse University. His interests include text categorization, information extraction from text, inductive learning of patterns, knowledge representation, the semantics of programming languages, and the mathematical foundations of computer science.

Tong Zhang   IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598 (electronic mail: tzhang@us.ibm.com). Dr. Zhang received a B.A. degree in mathematics and computer science from Cornell University in 1994 and a Ph.D. degree in computer science from Stanford University in 1998. Since 1998, he has been with the IBM Watson Research Center, where he is now a research staff member in the Knowledge Management department. His research interests include machine learning, numerical algorithms, and their applications.

Thilo Goetz   IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598 (electronic mail: tgoetsz@us.ibm.com). Dr. Goetz has been a research associate and later research staff member at IBM's Watson Research Center since 1997. He has a Ph.D. degree in computational linguistics from the University of Tübingen, Germany. His areas of interest include the intersection of computer science and computational linguistics, such as parsing, finite state methods, and compiler construction for computational linguistics, as well as complexity theory and logic for computer science. {/FOOT;4072f1;1}