Columbia/HCA Creates AIDS Network

Aids to the development of network simulators

In this paper we describe the features of a program designed to simulate computer networks. The networks are assumed to consist of hosts attached to one or more network nodes (communication units) which in turn communicate with one another via one or more communication channels. The program accounts for user-host, host-node, node-node, nodehost, and host-user protocols, as well as network topol...

An idiotypic network model of AIDS immunopathogenesis.

Considerations from a network theory of the immune system suggest that human immunodeficiency virus and allogeneic stimuli may act synergistically to cause AIDS. The immune responses to these stimuli include two components that are directed against each other. In some AIDS risk groups other antigens that mimic major histocompatibility complex antigens may substitute for allogeneic stimuli. Impl...

Smoothing images creates corners

The isophote curvature times the gradient magnitude to some power has been studied in the literature as a measure of cornerness in images. Stability in terms of sampling noise has been proposed by selecting corners at high scale and locating them at fine scale. We will examine the problem of tracking extrema of these measures in the Linear Scale-Space using catastrophe theory. This enables us t...

Reward creates oculomotor salience

Wouldn’t that be a good way of studying evolution in action over a few generations? One would think so. In particular, it is possible to measure all three components of the breeder’s equation, and see directly whether R = h2S. But, quite often, it appears that R does not equal h2S. For example, a study on antler size in red deer showed that red deer with larger antlers had more offspring than r...

AIDS