[1] Department of Mechanical Engineering, Keio University
[2] Thermophysics Division, National Institute of Standards and Technology, Gaithersburg
[3] Department of Mechanical Engineering, University of British Columbia, Vancouver, BC
[4] Institut f ür Thermodynamik, Technische Universitát München, D-8000, München
[5] Institut f ür Thermo- und, Fluiddynamik, Ruhr-Universität Bochum, D-4630, Bochum