1. Department of Mechanical Engineering, Indiana University-Purdue University Indianapolis (IUPUI), 723 West Michigan Street, Indianapolis, Indiana 46202, United States
2. Purdue University, West Lafayette, Indiana 47907, United States
3. Institute of Physics, University of Tartu, W. Ostwaldi 1, EE-50411 Tartu, Estonia
4. Kanomax Japan, Inc., Shimizu, Suita-shi, Osaka 565-0805, Japan