Kristensen, Steen2023-05-222023-05-221995-03-242007-06-29https://repository.upenn.edu/handle/20.500.14332/7128This technical report is the documentation of the work I did during my 6 months visit from August 1, 1994 to February 1995 at the GRASP Laboratory, University of Pennsylvania, Philadelphia, USA. This report has evolved from being working notes into what is presented here. I hope that this does not decrease the readability of the reportGRASPReport