Cover Image Credits

Professor at the FernUniversität in Hagen Fakultät für Mathematik und Informatik Lehrgebiet Mensch-Computer-Interaktion Hagen Germany This photograph shows a figure walking at night along a street in an ancient town in Europe. Many parts of the scene sink in indeterminacy and ambiguity. An ambivalent effect of the artwork is intended. Whether it evokes feelings of irritation and uncertainty or of comfort and security, depends on the observer.