1. Associate Lecturer, School of Mechanical and Manufacturing Engineering, Univ. of New South Wales, Kensington, Sydney, NSW 2052, Australia (corresponding author).
2. Associate Professor, School of Mechanical and Manufacturing Engineering, Univ. of New South Wales, Kensington, Sydney, NSW 2052, Australia.
3. Associate Professor, School of Engineering and Information Technology, Australian Defense Force Academy, Univ. of New South Wales, 2600 Northcott Dr., Canberra, ACT 2600, Australia.