1. Department of Mechanical System
Engineering, University of Hyogo, 2167
Shosha, Himeji, Hyogo 671-2201, Japan
2. Research Center of High Pressure Technology, 3-11-6 Modorigaokahigashi,
Miki, Hyogo 673-0533, Japan
3. Research Center for Material Cycles
and Waste Management, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan