Sharlotte L.B. Kramer, Sandia National Laboratories, Albuquerque, USA. Rachael Tighe, School of Engineering, University of Waikato, Hamilton, New Zealand. Ming-Tzer Lin, National Chung Hsing University, Taichung, Taiwan, Cosme Furlong, Mechanical Engineering Department, Worcester Polytechnic Institute, Worcester, USA. Chi-Hung Hwang, National Applied Research Laboratories, Taiwan Instrument Technology Institute, Hsinchu, Taiwan.