1. Departament d’Enginyeria Electrònica, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
2. Department of Mechanical Engineering, Wayne State University, Detroit, Michigan 48202, United States
3. Department of Mechanical Engineering, Pennsylvania State University, 240 Research East Building, University Park, Pennsylvania 16802, United States
4. School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States