Department of Mechanical Engineering, University of Melbourne, Parkville, Melbourne, 3010, Australia. nusrath@dcs.ruh.ac.lk.|Department of Computing and Information Systems, University of Melbourne, Parkville, Melbourne, 3010, Australia.|Department of Nursing, University of Melbourne, Parkville, Melbourne, 3010, Australia.|Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, 2601, ACT, Australia.