1. Professor Department of Mechanical Engineering for Transportation, Osaka Sangyo University, 3-1-1, Nakagaito, Daito-shi, Osaka 574-8530, Japan e-mail:
2. Associate Professor Department of Mechanical Engineering for Transportation, Osaka Sangyo University, 3-1-1, Nakagaito, Daito-shi, Osaka 574-8530, Japan e-mail: