Abstract. We discuss, compare and relate some old and some new models for incomplete and probabilistic databases. We characterize the expressive power of c-tables over infinite dom...
A conceptual model of a virtual world is a high-level representation of how the objects behave and how they are related to each other. The conceptual models identify the most esse...
through the specification of temporal, spatial and spatio-temporal relations. Moreover, we propose an abstract animation model that can be combined with the intra-media temporal st...
We analyze the literature in order to clarify the concept of business model and to identify hotspots business models. Based in those models an in a set of interviews we produced a...
The necessity of a subject–machine–object interaction (SMOI) reference model and its application in electronic publishing of the objects of our culture is considered. The comp...