Biographical sketches of authors

Tetsuya Nasukawa   IBM Research Division, Tokyo Research Laboratory, 1623-14, Shimotsuruma, Yamato, Kanagawa, Japan (electronic mail: nasukawa@jp.ibm.com). Dr. Nasukawa joined the IBM Tokyo Research Laboratory in 1989, after receiving a master's degree from Waseda University. He was involved with English-to-Japanese machine translation projects and digital library projects before he started the text mining project in 1998. He received a Ph.D. degree from Waseda University in 1998 for his work on natural language processing. His research interests include natural language understanding.

Tohru Nagano   IBM Research Division, Tokyo Research Laboratory, 1623-14, Shimotsuruma, Yamato, Kanagawa, Japan (electronic mail: tohru3@jp.ibm.com). Mr. Nagano joined the IBM Tokyo Research Laboratory and text mining project in 1998, after receiving a master's degree in computer science at the University of Tsukuba in Japan. Currently he is a member of the text mining project of the Internet Technology Division, where he is developing applications for the text mining system. His research interests include natural language processing, machine learning, and statistical analysis.