It is a great pleasure to thank Michael Kortmann. It has been an honor working with him on this project from the beginning. I would like to thank our secretaries Patricia Zündorf, Dagmar Faßbender, and Sandra Heidbrink for their support and their efforts way beyond the call of duty. I would like to thank the students of the past six years for the great fun and enthusiasm they have brought to the Physikshow. When is the next barbeque? A special thanks to Markus Bernhardt, Marc Prinz, and Tobi Strehlau for their ceaseless efforts in passing on their experience to the younger students. I would like to thank Douglas Cowen for very helpful comments on the manuscript and Michaela Mühl for her ceaseless efforts in helping me track down some of the older articles.