1. Graduate Student, Dept. of Mechanical Engineering, The Univ. of Auckland, Private Bag 92019, Auckland, New Zealand (corresponding author).
2. Senior Lecturer, Dept. of Mechanical Engineering, The Univ. of Auckland, Private Bag 92019, Auckland, New Zealand.
3. Associate Professor, Dept. of Mechanical Engineering, The Univ. of Auckland, Private Bag 92019, Auckland, New Zealand.