Joel T. Collins, University of Bath
A thesis submitted for the degree of Doctor of Philosophy
Attention is drawn to the fact that copyright of this thesis rests with the author. A copy of this thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with the author and that they must not copy it or use material from it except as permitted by law or with the consent of the author.
A PDF of the final version is available from the releases page.