Affiliation: | S. Yoneyama (SEM member) is an assistant professor; and H. Kikuta is an associate professor in the Department of Mechanical Engineering at the Osaka Prefecture University, Sakai, Osaka, Japan; . A. Kitagawa is chief researcher; , S. Iwata is senior chief researcher; , and K. Tani is researcher at the Technical Research Institute, Hitachi Zosen Corporation, Taisho, Osaka, Japan. |