Editorial Advisory Board Andreas Holzinger, Medical University Graz (MUG), Austria Andre Kushniruk, University of Victoria, Canada Pascale Carayon, University of Wisconsin-Madison, USA P. L. Patrick Rau, Tsinghua University, China Russell Beale, University of Birmingham, UK Martin G. Helander, Nanyang Technological University, Singapore Maddy D. Janse, Philips Research, The Netherlands James D. Hollan, University of California San Diego, USA Saadi Lahlou, London School of Economics, UK Susanne Bay, Siemens AG, Germany List of Reviewers Jens E. Appell, Fraunhofer Institute for Digital Media Technology, Germany Tico Ballagas, Nokia Research, USA Susanne Bay, Siemens AG, Germany Russell Beale, University of Birmingham, UK Bert Bongers, University of Technology Sydney, Australia Jan Borchers, RWTH Aachen University, Germany Pascale Carayon, University of Wisconsin-Madison, USA Stefan Carmien, Fatronik-Tecnalia, Spain