| 1983-1985（Univ. of Tsukuba） | Operations Research. The keywords are stochastic models and optimization. The title of the graduation thesis was Game theories and its applications where I worked on, the stochastic game, a kind of multi-stage game theories . At the graduate school, I studied stochastic processes such as renewal processes and martingales, and analyzed policies for investiments using martingales. Furthermore, I gave another proof for each of the theorems on the optimal policies of the stochastic game and the Markov decision process using martingale. |
| 1985-1990（ＮＥＣ） | Development tool for expert systems. I was in charge of a rule inference engine. |
| 1989（ＮＥＣ） | Conducted an experiment on the ability of a specification description language
for communication protocols, ＬＯＴＯＳ (collaboration with Electrotechnical Laboratory and other makers). |
| 1996-1999（Electrotecnical Laboratory） | A model of human mind. Proposed a personality model in order to implement functions of human mind on computer systems. I focused the defense mechanism such as repression. |
