[1] Mechanical Engineering, Graduate School of Engineering, University of Fukui, 9-1, Bunkyo 3-chome, Fukui-shi, Fukui 910-8507, Japan
[2] Fiber Amenity Engineering, Graduate School of Engineering, University of Fukui, 9-1, Bunkyo 3-chome, Fukui-shi, Fukui 910-8507, Japan