1. Department of Computer Science, Bonn-Rhein-Sieg University of Applied Sciences, 53757 Sankt Augustin, Germany
2. Department of Electrical Engineering, Mechanical Engineering and Technical Journalism, Bonn-Rhein-Sieg University of Applied Sciences, 53757 Sankt Augustin, Germany
3. Fraunhofer Institute for Algorithms and Scientific Computing (SCAI), Schloss Birlinghoven, 53757 Sankt Augustin, Germany