1. TEX E. G. Co. Ltd, 2-3-28 Oyamagaoka, Machida-shi, Tokyo 194-0215, Japan
2. Salesian Polytechnic, 4-6-8 Oyamagaoka, Machida-shi, Tokyo 194-0215, Japan
3. Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama-shi, Kanagawa 221-8686, Japan
4. National Institute for Materials Science, 1-2-1 Sengen, Tukuba-shi, Ibaragi 305-0047, Japan