Enhancements, not replacements…

Molecular replacements

HPA* Enhancements

In video games, pathfinding must be done quickly and accurately. Not much computational time is allowed for pathfinding, but realistic looking paths are required. One approach to pathfinding which attempts to satisfy both of these constraints is to perform pathfinding on abstractions of the map. Botea et al.’s Hierarchical Pathfinding A* (HPA*) does this by dividing the map into square sectors ...

TCP enhancements

In this writeup, we summarize the extensions made to TCP (relative to what I teach in the Internet architecture/protocols course). The list includes: 1. Larger window sizes accommodated through a window scale option is proposed for LFNs (Networks with Long Fat Pipes) [1], which are networks that have large values of the delay bandwidth product (DBP). TCP performance depends upon this product. T...

Hard Tissue Replacements

The use of biomaterials to restore the function of traumatized or degenerated connective tissues and thus improve the quality of life of a patient has become widespread. In the past, implants were designed with insufficient cognizance of biomechanics. Accordingly, the clinical results were not very encouraging. An upsurge of research activities into the mechanics of joints and biomaterials has ...

Toxicology of chlorofluorocarbon replacements.

Chlorofluorocarbons (CFCs) are stable in the atmosphere and may reach the stratosphere. They are cleaved by UV-radiation in the stratosphere to yield chlorine radicals, which are thought to interfere with the catalytic cycle of ozone formation and destruction and deplete stratospheric ozone concentrations. Due to potential adverse health effects of ozone depletion, chlorofluorocarbon replacemen...