Institution: | Y. Morimoto (SEM Member) is Professor, Department of Industrial Engineering, Faculty of Economics, Wakayama University, Sakaedani, Wakayama 640, Japan.;Y. Morimoto, Jr. (SEM Member) is Graduate Student, and T. Hayashi is Emeritus Professor, Department of Mechanical Engineering, Faculty of Engineering Science, Osaka University, Toyonaka, Osaka 560, Japan. |