DECLARATION

This thesis is my own work and, to the best of my knowledge and belief, it contains:

• no material previously published or written by another person, except where this
  is explicitly defined in the acknowledgements;
• no material which to a substantial extent has been accepted for the qualification
  of any other degree or diploma of a university or other institution
  of higher learning.

Third Party Copyright Statement

I have either used no substantial portions of third party copyright material, including
charts, diagrams, graphs, photographs or maps, in my thesis or I have obtained permission
for such material to be made accessible worldwide via the internet. If permission has
not been obtained, I have removed the third party copyright material from the digital copy.