1. School of Engineering, Computer and Mathematical Sciences, Auckland Univ. of Technology, 6 St Paul St., Auckland 1010, New Zealand.
2. Professor, School of Engineering, Computer and Mathematical Sciences, Auckland Univ. of Technology, 6 St Paul St., Auckland 1010, New Zealand (corresponding author). ORCID: .
3. Fulton Hogan Ltd., 15 Sir William Pickering Dr., Christchurch 8053, New Zealand.