We exploit the combination of a virtual world containing physicallyinteracting 4D objects with a multimodal haptics-driven user-interface model; the goal is to facilitate the development of accurate cognitive models enabling the visualization of 4D space. Our primary test domain supports tactile interaction with physically colliding and deformable curves and surfaces embedded in 4D, an importan...

In gravitational theories with extra dimensions, it is argued that the existence of a positive vacuum energy generically implies catastrophic instability of our four-dimensional world. The most generic instability is a decompactification transition to growth of the extra dimensions, although other equally bad transitions may take place. This follows from simple considerations based on the form ...

We study a dynamically broken U (1) L gauge theory endowed with a composite scalar doublet (one scalar and one pseudoscalar); its Lagrangian only differs from that of an abelian 'Standard Model' by the addition of a derivative coupling between a Wess-Zumino field, linked to the previous scalars, and the fermionic current. Yet, in the Feynman path integral, the non independence of the fermionic ...

The aim of this paper is to build an upper-level ontology of artifacts. To this end, two formal tools are employed: theory of consequence operation and ontology of states of affairs. It is argued that the adequate representation of an artifact consists of the representation of the artifact’s purposes, the representation of its design, the representation of the background knowledge according to ...

This paper offers a practice-oriented critical analysis of the scientific literature on knowledge transfer and exchange (KTE) derived from the results of a large-scale systematic review of knowledge exchange at the organizational and policy levels. Analysis is structured around four questions that must be answered to get a proper understanding of the KTE process and KTE intervention design and ...