This paper adresses the forthcoming technical issue of collaborative geometric modeling, using a previously existing virtual sculpting framework. A software architecture is described, called SpinCAS (Spin3D Computer Aided Sculpting) providing the user with the ability to both sculpt objects virtually, and share such modeling along the internet in realtime. Technical issues are discussed, especi...

A group of physical limitations to these systems exist. The O-arm images are planar and orthogonal and their views are made through digital volumetric construction affecting their spacial accuracy, though, an accuracy of a pexil representation of 1 mm is now available and acceptable [2]. The neuronavigator camera is a static one so far, and the precision of its optical tracking system depends o...

The linear accelerator (linac) is a device that uses highfrequency electromagnetic waves to accelerate charged particles such as electrons to high energies through a linear tube. The high-energy electron beam can be used for treating superficial tumours, or it can be made to strike a target to produce x-rays for treating deep-seated tumours. In the majority of instances, the collimated beam eme...

In some urban transit systems, passengers are legally required to purchase tickets before entering but are not physically forced to do so. Instead, patrol units move about through the transit system, inspecting tickets of passengers, who face fines for fare evasion. This setting yields the problem of computing optimal patrol strategies satisfying certain temporal and spacial constraints, to det...

1. Uni ed eld theories suggest a N dimensional conguration space with N̄ = N−4 > 0 extra dimensions not perceived in nature. The common heuristic reasons for this proposition are: (i) the volume [Hausdor measure] does not scale like μH(δ,R ) = δ μH(1,R ), where δ is some length scale and 1 stands for its unity. Instead, experience tells us that increasing (or decreasing) the spacial size of an o...

Tagging the environment gives users the possibility to explicitly construct and define parts of their spacial context. The tags assigned to RFIDidentified objects in the environment can be used to enrich formalized domainspecific context-models with user generated keywords to take communityand user-generated meanings into account. These references in space help to navigate information and servi...

Building military simulations requires bridging the gap between the knowledge of commanders and computer representations of that knowledge. A significant part of this knowledge concerns military tasks, their interactions, and an understanding of how to grade their achievement. Action Models describe the complex spacial and temporal dynamics of goal directed tasks with a graphical notation. Comm...