Copyright @ 2011 by the University of Edinburgh. All Rights Reserved.
The authors and The University of Edinburgh retain the right to reproduce and publish these theses for non-commercial purposes. Permission is granted for these theses to be reproduced by others for non-commercial purposes as long as this copyright notice is reprinted in full in any reproduction. Applications to make other use of this material should be addressed in the first instance to Copyright Permissions, School of Informatics, The University of Edinburgh, 2 Buccleuch Place, Edinburgh EH8 9LW, Scotland.