1. Department of Mechanical and Systems Engineering, Faculty of Science and Technology, Ryukoku University, Otsu, Shiga 520-2194, Japan
2. Research Institute for Engineering and Technology, Tohoku Gakuin University, Tagajo, Miyagi 985-8537, Japan
3. Institute for Materials Research, Tohoku University, Sendai, Miyagi 980-8577, Japan
4. Graduate School of Science and Engineering, Yamagata University, Yonezawa, Yamagata 992-8510, Japan