1. Department of Computer Science, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
2. Simulation and Software Technology, German Aerospace Center, Linder Hoehe, Cologne, Germany
3. Science, Technology and Engineering Directorate, Los Alamos National Laboratory, Los Alamos, USA
4. Institute of Physics, University of Greifswald, Greifswald, Germany
5. Erlangen Regional Computing Center, Friedrich-Alexander-Universität Erlangen-Nürnberg
6. Institute of Computational Science, Università della Svizzera italiana, Lugano, Switzerland