1. Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu 808-0196, Japan
2. Mimasaka University, 50 Kitazonocho, Tsuyama 708-8511, Japan
3. Department of Information Engineering, Faculty of Information Engineering, Meijo University, 1-501 Shiogamaguchi, Tenpaku-ku, Nagoya 468-8502, Japan