1. Department of Applied Physics
and Physico-Informatics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522,
Japan
2. Quality Management
Group, AGC Seimichemical Company, Ltd.,
3-2-10 Chigasaki,
Chigasaki City, Kanagawa 253-8585, Japan