Graduate School of Engineering, Tottori University, Koyama-minami, Tottori, Japan. kimura@ike.tottori-u.ac.jp|Graduate School of Engineering, Tottori University, Koyama-minami, Tottori, Japan. kimura@ike.tottori-u.ac.jp|Graduate School of Engineering, Tottori University, Koyama-minami, Tottori, Japan. kimura@ike.tottori-u.ac.jp