About the Author
Ernst O. Göbel was president of the Physikalisch-Technische Bundesanstalt (PTB), the German national metrology institute from 1995 until the end of 2011. After his PhD from the University of Stuttgart, Germany, and a postdoctoral stay at Bell Laboratories in Holmdel, USA, he continued his scientific career at Stuttgart University, and subsequently at the Max-Planck-Institut for Solid State Physics in Stuttgart. In 1985 he was appointed full professor at the University of Marburg, Germany. He received several scientific awards such as the Leibniz Prize of the German Research Foundation (DFG) and the Max Born Award jointly provided by the Institute of Physics (London) and the German Physical Society (DPG).
Uwe Siegner is Head of the Division "Electricity" at the PTB since 2009, and lecturer at the Technical University of Braunschweig, Germany. He obtained his PhD from the University of Marburg after which he spent two years as postdoctoral researcher at the Lawrence Berkeley National Laboratory, USA. He did his habilitation at the ETH Zurich, Switzerland, and accepted a position at the PTB in 1999.