[1]Chiba Science Institute Yakumo Meguro-Ward Tokyo 152-0023 Japan;
[2]National Maritime Research Institute 6-38-1 Shinkawa Mitaka-City Tokyo 181-0004 Japan;
[3]Wits Inc. Oshiage Sakura-City Tochigi 329-1334 Japan;
[4]Kureha Elastomer Co. Ltd Kanonnji-cho Tsu-City Mie 514-8511 Japan;