1. National Research Institute of Police Science, Kashiwa, Chiba 277-0882, Japan
2. Central
Research Laboratory, Hitachi, Ltd., Kokubunji, Tokyo 185-8601, Japan
3. Defense
Systems Company, Hitachi, Ltd., Chiyoda, Tokyo 101-8608, Japan
4. Hitachi High-Tech Solutions Corporation, Mito, Ibaraki 319-0316, Japan