1. Division of Mechanical Science and Technology, Faculty of Science and Technology, Gunma University
2. Under Graduate Student, Division of Mechanical Science and Technology, School of Science and Technology, Gunma University
3. Graduate Student, Division of Mechanical Science and Technology, Graduate School of Science and Technology, Gunma University
4. Department of Mechanical Engineering, Faculty of Engineering, Shibaura Institute of Technology
5. Institute of Industrial Science, The University of Tokyo