1. Shan Research Group Department of Mechanical and Aerospace Engineering Syracuse University Syracuse NY 13244 USA
2. Shan Research Group Mechanical Engineering Department University of Nevada, Reno NV 89557 USA
3. School of Engineering and Applied Science Yale University New Haven CT 06511 USA
4. Materials Science and Engineering Department of Physics Arizona State University Tempe AZ 85287 USA
5. Department of Industrial and Manufacturing Systems Engineering Iowa State University Ames IA 50011 USA