1. Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
2. Department of Engineering Mechanics and Energy, University of Tsukuba, Tsukuba, Ibaraki, Japan
3. Research Institute for Measurement and Analytical Instrumentation, National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan