Affiliation 1:
Goethe University of Frankfurt am Main
Department of Physics
Max-von-Laue-Strasse 1
60438 Frankfurt am Main, Germany
E-Mail: moll(at)physik.uni-frankfurt.de
Phone: +49 (0) 69 798-47208
Affiliation 2:
University of Siegen
Department of Mechanical Engineering
Paul-Bonatz-Straße 9-11
57076 Siegen
E-Mail: jochen.moll(at)uni-siegen.de
Phone: +49 (0) 271 740-4943