Hello and welcome to my WWW Home Page!English / Japanese
I am Professor of the
Department of Computer Science
I have been in Gunma since March 1989. I received B.Eng., M.Eng.,
and Ph.D. degrees all from the
Mathematical Engineering and Information Physics, the
University of Tokyo.
I was a visiting researcher at the University of Waikato, New Zealand, from 1993 to 1994.
Improved variations relating the Ziv-Lempel and Welch-type algorithms for sequential data compression. IEEE Transactions on Information Theory, Vol.38, No.1, pp.73-81 (1992).
Overflow/underflow-free floating-point number representations with self-delimiting variable-length exponent field. IEEE Transactions on Computers, Vol.41, No.8, pp.1033-1039 (1992).
Adaptive encoding for numerical data compression. Information Processing & Management, Vol.30, No.6, pp.863-873 (1994).
Data compression using a sort-based context similarity measure. Computer Journal, Vol. 40, No. 2/3, pp.94-102 (1997).
Average-sense optimality and competitive optimality for almost instantaneous VF codes. (coauthor: H. Yamamoto), IEEE Trans. Inform. Theory, Vol. 47, No. 6, pp. 2174-2184 (2001).