1. Department of Human and Information Systems Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
2. Department of Mechanical and Systems Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
3. School of Mechanical Engineering, Georgia Institute of Technology Atlanta, J. E. Love Jr. Manufacturing Building, 771 Ferst Drive, GA 30332-0405, USA