1. Ph.D. Candidate, School of Civil and Environmental Engineering, Univ. of New South Wales, Sydney, NSW 2052, Australia (corresponding author).
2. Professor, School of Civil and Environmental Engineering, Univ. of New South Wales, Sydney, NSW 2052, Australia; and Affiliate Researcher, National ICT Australia (NICTA), Australian Technology Park, Eveleigh, Sydney, NSW 2015, Australia.
3. Professor, School of Computer Science Engineering, Univ. of New South Wales, Sydney, NSW 2052, Australia.