was a Japanese
computer scientist
A computer scientist is a person who is trained in the academic study of computer science.
Computer scientists typically work on the theoretical side of computation, as opposed to the hardware side on which computer engineers mainly focus (a ...
, known for his influential contributions to
theoretical computer science
computer science (TCS) is a subset of general computer science and mathematics that focuses on mathematical aspects of computer science such as the theory of computation, lambda calculus, and type theory.
It is difficult to circumscribe the ...
, as well as for the development of
Japanese keyboard layouts, a challenging practical problem. From 1972 to 1991, he was professor of the
formal languages
In logic, mathematics, computer science, and linguistics, a formal language consists of words whose letters are taken from an alphabet and are well-formed according to a specific set of rules.
The alphabet of a formal language consists of sy ...
division at the Department for Information Science at the
University of Tokyo
, abbreviated as or UTokyo, is a public research university located in Bunkyō, Tokyo, Japan. Established in 1877, the university was the first Imperial University and is currently a Top Type university of the Top Global University Project b ...
.
Work
In the field of theoretical computer science, Yamada introduced the notion of real-time computability. As his colleague
Aravind Joshi
Aravind Krishna Joshi (August 5, 1929 – December 31, 2017) was the Henry Salvatori Professor of Computer and Cognitive Science in the computer science department of the University of Pennsylvania. Joshi defined the tree-adjoining grammar form ...
recalls:
Selected publications
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* Hisao Yamada: "A Historical Study of Typewriters and Typing Methods: from the Position of Planning Japanese Parallels", Journal of Information Processing, 2(4) (February 1980), pp. 175–202
References
''Deaths: Dr. Hisao Yamada, SEAS.''University of Pennsylvania Almanac 55(2), p. 3
University of Tokyo, Department of Information Science
External links
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{{DEFAULTSORT:Yamada, Hisao
Japanese computer scientists
Theoretical computer scientists
1930 births
2008 deaths