Osamu Tanaka
Kyushu Institute of Technology Kitakyushu, 804, Japan
Hidekazu Koshino
Kyushu Institute of Technology Kitakyushu, 804, Japan
Hisashi Sakai
Kyushu Institute of Technology Kitakyushu, 804, Japan
Ryuji Furukawa
Kyushu Institute of Technology Kitakyushu, 804, Japan
Yoshinobu Inada
Kyushu Institute of Technology Kitakyushu, 804, Japan