First Author:   Shigeru Matsumoto Kansai University kshigeru@ipcku.kansai-u.ac.jp   3-3-35 Yamate-cho Suita, 564-8680, JAPAN   +81-6-6368-0611(Phone) +81-6-6368-0611(Fax) http://www2.ipcku.kansai-u.ac.jp/~kshigeru/index-e.html Second Author: Hajime Sugeta Kansai University sugeta@ipcku.kansai-u.ac.jp   3-3-35 Yamate-cho Suita, 564-8680, JAPAN   +81-6-6368-1121(Phone) +81-6-6339-7704(Fax)