Fusaomi Nagata, Keigo Watanabe(Okayama Univ.), Tetsuo Hase(Meiho Co. Ltd.), Zenku Haga(Meiho Co. Ltd.), Masaaki Omoto(Meiho Co. Ltd.), Kunihiro Tsuda(ASA Systems Inc.), Osamu Tsukamoto(ASA Systems Inc.), Masaki Komino(ASA Systems Inc.) and Yukihiro Kusumoto(Fukuoka Industrial Technology Center)