1. Department of Chemical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395,
Japan
2. Department of Mechanical
Engineering, Gifu National College of Technology, 2236-2 Kamimakuwa, Motosu, Gifu 501-0495, Japan
3. Aichi Electric Company, Ltd., 1 Aichi-cho, Kasugai, Aichi 486-8666, Japan