Participative development of touchless user interfaces: elicitation and evaluation of contactless hand gestures for anesthesia - Künkel, Daniel; Bomsdorf, Birgit; Röhrig, Rainer; Ahlbrandt, Janko; Weigand, Markus A. (Proceedings of the International Conferences on Interfaces and Human Computer Interaction 2015, Game and Entertainment Technologies 2015 and Computer Graphics, Visualization, Computer Vision and Image Processing 2015, 2015)