Author :
Homma, Noriyuki ; Nakamura, Tohru ; Hayashida, Tetsuya ; Matsumoto, Motoaki ; Nakazato, Kazuo ; Onai, Takahiro ; Tamaki, Youichi ; Namba, Mitsuo ; Sagara, Kazuhiko ; Ikeda, Kiyoji
Author_Institution :
Central Research Laboratory, Hitachi Ltd, Kokubunji, Tokyo 185