1. Lecturer, Griffith School of Engineering, Griffith Univ., Gold Coast, QLD 4222, Australia (corresponding author).
2. Ph.D. Student, Griffith School of Engineering, Griffith Univ., Gold Coast, QLD 4222, Australia.
3. Lecturer, School of Mathematics and Applied Statistics, Univ. of Wollongong, Wollongong, NSW 2522, Australia.
4. Senior Lecturer, Griffith School of Engineering, Griffith Univ., Gold Coast, QLD 4222, Australia.