Design rules sometimes seem to contradict. We examine how<lb>a formal description of user behaviour can help explain the context when<lb>such rules are, or are not, applicable. We describe how they… (More)
Maintaining and repairing complex technical facilities such as generating plants requires comprehensive knowledge on subsystems, operational and safety procedures by the technician. Upgrades to the… (More)
Task models are widely used within the research field of HCI for the model-based development of interactive systems. Recently introduced approaches applied task models further to model the… (More)
This paper discusses two different approaches for using different kinds of patterns and the corresponding tool support aiming at pattern-supported model transformations. The patterns include GoF… (More)
A lot of research and work has been done in the past, to develop XML based user-interface definition languages. Also languages to describe graphics and animations were created. In an attempt to… (More)
Today, Internet-based appliances can allow a user to interact with the server-side services and information using different kinds of computing platforms including traditional office desktops,… (More)
Linear and selective undo mechanisms have been studied extensively. However, relatively little attention has been given to the semantics of selective undo in situations in which the undone command… (More)
In most of the cases usability evaluations are done by usability experts. Employing such experts requires a certain size in business. Nevertheless users do not tolerate hard to use tools. So in a lot… (More)