Upper Austria University of Applied Sciences, Hagenberg, Austria. frech.christian@gmail.com|Upper Austria University of Applied Sciences, Hagenberg, Austria. frech.christian@gmail.com|Upper Austria University of Applied Sciences, Hagenberg, Austria. frech.christian@gmail.com|Upper Austria University of Applied Sciences, Hagenberg, Austria. frech.christian@gmail.com|Upper Austria University of Applied Sciences, Hagenberg, Austria. frech.christian@gmail.com|Upper Austria University of Applied Sciences, Hagenberg, Austria. frech.christian@gmail.com|Upper Austria University of Applied Sciences, Hagenberg, Austria. frech.christian@gmail.com