1. Ph.D. Student, School of Engineering and Advanced Technology, Massey Univ., Albany Village, Dairy Flat Highway, Auckland 0632, New Zealand.
2. Chair Professor, Dept. of Mechanical Engineering, Univ. of Auckland, 20 Symonds St., Auckland 1142, New Zealand (corresponding author).
3. Senior Lecturer, School of Engineering and Advanced Technology, Massey Univ., Albany Village, Dairy Flat Highway, Auckland 0632, New Zealand.
4. Associate Professor, Dept. of Civil, Environmental, and Biomedical Engineering, Univ. of Hartford, 200 Bloomfield Ave., West Hartford, CT 06117.