By Toshifumi Kai (Matsushita Electric Works, Ltd.) , Hiroshige Nakatani (Matsushita Electric Works, Ltd.) , Naohiro Fukuda (Matsushita Electric Works, Ltd.) , Akira Hashiguchi (Kogakuin University) , Teruaki Takahashi (Kogakuin University) , Katsuji Tsukamoto (Kogakuin University)
By Toshifumi Kai (Matsushita Electric Works, Ltd.) , Hiroshige Nakatani (Matsushita Electric Works, Ltd.) , Naohiro Fukuda (Matsushita Electric Works, Ltd.) , Teruaki Takahashi (Kogakuin University) , Akira Hashiguchi (Kogakuin University)