An optically interconnected Beowulf cluster has been modelled considering the optical, optoelectronic, electronic and algorithmic behaviour of the system. A Smart Pixel Array (SPA) layer was considered to alleviate the bandwidth mismatch between the commodity IO bus of the PCs and the high bandwidth in the optics. By using the SPA layer to provide load balancing for the system it has been shown...

In many distributed sensing problems, resource constraints preclude the utilization of all sensing assets. By way of example, inference in distributed sensor networks presents a fundamental trade-o_ between the utility in a distributed set of measurements versus the resources expended to acquire them, fuse them into a model of uncertainty, and then transmit the resulting model. Active approache...

A variety of parametric and semiparametric models produce qualitatively similar estimates of government policies’ effects on income distribution and welfare (as measured by the Gini, standard deviation of logarithms, relative mean deviation, coefficient of variation, and various Atkinson indexes). Taxes and the Earned Income Tax Credit are an effective way to redistribute income to the poor and...

An expression for the spin–orbit interaction coupling between different levels, which was shown to be aberrant more than thirty years ago persists in the literature without clear indication of what is used. It leads to expressions quite simpler than they should be. After an attempt to warn the community of the nuclear physicists on this strange situation (nucl-th/0312038), the authors of the pu...