Add to ORKGI hereby declare that this submission is my own work and to the best of my knowledge it contains no material previously published or written by another person, nor material which has been accepted for the award of any other degree or diploma at the University of Western Sydney, or at any other educational institution, except where due acknowledgment is made in the thesis. I also declare that the intellectual content o this thesis is the product of my on work, except to the extent that assistance from others in he project’s design and conception is acknowledged