Would you adopt Second Life as a training and development tool?

A survey of perceptions of Second Life as a training and development tool indicates that its use is still in the early stages of the adoption curve. Moreover, professionals who are familiar with it do not typically express the same enthusiasm for it as media reports seem to indicate.     

An investigation of WISC-R verbal-performance differences as a function of ethnic status

The Wechsler Intelligence Scale for Children-Revised was administered to 187 black, 184 Hispanic, and 184 white children aged 6–11. The Verbal-Performance (V-P) IQ discrepancies were determined for the total group and for each ethnic group. The overall mean of 10.74 was similar to the V-P discrepancy found in the WISC-R standardization sample. The Hispanic group had a significantly greater V-P split than did the black group or the white group. Implications of these results were discussed, focusing on the various cautions of using V-P discrepancies for diagnostic decision making.     

Approximate solution (with error bounds) to a nonlinear,nonautonomous second-order differential equation

Two approximations are developed to the solution of an important nonlinear, nonautonomous second-order differential equation that arises in various fields of science and technology such as operations research, mathematical ecology and epidemiology. The origin of the second-order differential equation from a system of two nonlinear first-order differential equations modelling, for example, Lanchester-type combat between two homogeneous military forces is discussed. Extension of our results to a more general system of nonlinear first-order differential equations is indicated. Error bounds that do not require that the exact solution be known are developed. Some connections between our results and those for the Liouville-Green (or WKB) approximation to the solution of the linear second-order equation are indicated.     

Sensitivities of detonating compounds to frictional impact,impact, and heat

Using standardized tests, the sensitivities of twenty compounds and two mixtures to frictional impact, impact, and heat have been studied and recorded. The results show that values obtained by one test are not paralleled by those of either of the other two tests, but that, on division into classes, averages indicating a general correlation are obtained.