DAISy Dynamic Ambient Intelligent Systems Unit

This paper describes a set of issues that we were confronted with when trying to specify people’s interaction with a ubiquitous computing application. In such an application, the computer “disappears” and computing services are made available to users throughout their physical environment. Thus, objects in the environment, which become enhanced with new capabilities because of the computational power they acquire, re-appear in the task models of people. Issues here are presented from the usage level.