| Project/Area Number |
07660225
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
林産学
|
|---|
| Research Institution | KAGOSHIMA UNIVERSITY |
|---|
Principal Investigator |
HATTORI Yoshiaki Kagoshima Univ. Dep. of Agriculture, Associate Prof., 農学部, 助教授 (80180909)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
TERATOKO Katsuya Kagoshima Univ. Dep. of Agriculture, Assistant, 農学部, 助手 (70264455)
FUJITA Shinsuke Kagoshima Univ. Dep. of Agriculture, Professor, 農学部, 教授 (70032563)
|
|---|
| Project Period (FY) |
1995 – 1996
|
| Project Status |
Completed (Fiscal Year 1996)
|
| Budget Amount *help |
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1996: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1995: ¥2,200,000 (Direct Cost: ¥2,200,000)
|
|---|
| Keywords | CHAOS / DETERMINISTIC CHAOS / CAPILLARY VESSELS PULSATION / EEG / COMFORT AND PLEASANTNESS / TIME SERIES / MAXIMUN LYAPUNOV EXPONENTS / 居住性 / 脳波 / リアプノフ指数 |
|---|
| Research Abstract |
The aims of this research were to develop the method for eveluation the extent of comfort and pleasantness using the theory of chaos. As the first step, we developed the computer software for processing and analyzing time series of various rhythms from living body. The software were developed on the operating system of Windows95 using the language of Microsoft Visual C++ and library of Microsoft Foundation Class. And the equipment for detection of the rhythms was developed. The main objects were time series of ECG and pulsation of capillary vessels.
The maximum Lyapunov exponents was used as the judgment whether the time series was chaotic or not. The positive value of Lyapunov exponents means chaotic behavior. The sign of the maximum Lyapunov exponents depended on the subject's state. And the chaotic behavior were detected on relaxd conditions more than tensed conditions according to the sign of the maximum Lyapunov exponents. The assumption that healthy state is chaotic do not always apply to any cases.
The chaos analysis is expected to be useful method for evaluation the state of subjects. We expect that our computer applications are used widely. We offer to provide the applications developed in the research for any researchers in this research field.
|
