Declaration I hereby deposit a digital copy of my thesis with the University of Waikato Library. I confirm that any changes required by the examiners have been carried out to the satisfaction of my primary supervisor and that the content of the digital copy corresponds exactly to the content of the print copy in its entirety. I declare that this thesis is my own original work and, to the best of my knowledge and belief, it does not: * Breach copyright or other intellectual property rights of a third party. * Contain material previously published or written by a third party, except where this is appropriately cited through full and accurate referencing. * Contain 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. * Contain substantial portions of third party copyright material, including but not limited to charts, diagrams, graphs, photographs or maps, or in instances where it does, I have obtained permission to use such material and allow it to be made accessible worldwide via the Internet. Conditions of use From the date of deposit of this thesis, subject to any approved access restrictions, I agree and acknowledge that the conditions of use are as follows: 1. This thesis may be consulted for the purposes of private study or research provided that appropriate acknowledgement is made of its use; 2. The digital copy is made available via the Internet by the University of Waikato Library in downloadable, read-only format with unrestricted access, in the interests of open access to research information, provided that the thesis is not subject to an embargo. Should an embargo be in place, the digital copy will only be made available as set out above once the embargo has been lifted. In accordance with the Copyright Act 1994, the University of Waikato Library may make a copy of this thesis for supply to the collection of another prescribed library on request from that library, or for any other permitted purposes specified under the Act.