94977document40800Newell09EngD_A1a[1].pdfapplication/pdfb47a5be75d812c0ae0cb34a8455b9032MD5135848012015-01-30 14:08:42http://etheses.bham.ac.uk//id/eprint/525/1/Newell09EngD_A1a%5B1%5D.pdf