This paper describes the Region Occlusion Calculus (ROC-20), that can be used to model spatial occlusion and the effects of motion parallax of arbitrary shaped objects. ROC-20 ass...
The paper discusses the relation between accessibility and multimodality of learning objects. I present a framework, rooted in linguistics, that supports a clear distinction betwee...
Confinement properties impose a structure on object graphs which can be used to enforce encapsulation properties. From a practical point of view, encapsulation is essential for bu...
We present SpiCO, a new modeling and simulation language for systems biology. SpiCO is based on the stochastic π-calculus. It supports higher level modeling via multi-profile con...
Tropes, an object-based knowledge representation system, has been added three important intertwined features: constraints, composite objects and tasks. Constraints provide a decla...