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Recommender technologies are crucial for the effective support of customers in online sales situations. The state-of-the-art research in recommender systems is not aware of existing theories in the areas of cognitive and decision psychology and thus lacks of deeper understanding of online buying situations. In this paper we present results from user studies(More)
In this paper we explore the usage of "force fields" in order to facilitate the computer user during pointing tasks. The first study shows that pointing time can be reduced by enhancing a pointing target with an invisible force field that warps the screen cursor toward the target center. The application of force fields is further supported in that we show(More)
In this paper we show how a model centered analysis of the usage of the mouse click interaction action in graphical user interfaces can be used to create a new menu system. The analysis identifies a possible new usage of the click action in cascading pull-down menus which can make it easier for the user during menu navigation and selection. A new menu(More)
Das Smart Home mit all seinen Möglichkeiten und Funktionen hat sich im privaten Wohnumfeld bisher nicht durchgesetzt. Die Gründe dafür sind vielschichtig, Aspekte der Human Computer Interaction (HCI) spielen dabei aber eine entscheidende Rolle. Anhand des aktuellen Leitkonzepts der HCI, User Experience, analysiert der Beitrag Bedieneigenschaften und(More)
| Based on the Cayley graph framework for the generation and application independent evaluation of multiprocessor in-terconnection topologies, an application dependent task mapping problem is addressed. In particular, we start from an inter-connection topology considered attractive from a graph theoretical point of view which is produced by an(More)
The success of an experiment of using C++ as a first programming language for students of a specific type of computer science is presented. The paper motivates the shift from Modula-2 to C++ in the curriculum, shortly describes the course and discusses the statistical evaluation of the results of the last Modula-2 course and the first C++ course,(More)