Affiliations: Department of Information Systems Engineering, Osaka
Sangyo University, 3-1-1 Nakagaito, Daito, Osaka 574-8530, Japan. E-mail:
ohmi@ise.osaka-sandai.ac.jp | Department of Information Systems Engineering, Osaka
Sangyo University, 3-1-1 Nakagaito, Daito, Osaka 574-8530, Japan. E-mail:
isao@awata.org