1. Steinbuch Centre for Computing, Karlsruhe Institute of Technology, Karlsruhe, Germany
2. Jülich Supercomputing Centre, Forschungszentrum Jülich, Jülich, Germany
3. Department of Informatics, Visual Computing Laboratory, Technical University of Munich, Munich, Germany
4. Faculty of Electrical and Computer Engineering, University of Iceland, Reykjavik, Iceland