1. Department of Environmental Sciences, Faculty of Science, Osaka Women's University, Daisen-cho, Sakai, Osaka 590-0035
2. Department of Applied Physics, School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603
3. Business Communication Research Institute, Aichi Shukutoku University, Nagakute-cho, Aichi, 480-1197