Institution: | a College of Engineering, Nihon University, Kohriyama, Fukushima 963-8642, Japan b University of Electro-communications, Chufugaoka, Chofu, Tokyo, Japan c Independent, 2-2-22 Kichijyojikita, Musashino-shi 180-0001 Japan d Independent, 3-73 Honda, Midori-ku, Chiba-shi, 266-0005 Japan |