An experiment was conducted to evaluate the effects of localized auditory information on visual target detection performance. Visual targets were presented on either a wide field-of-view dome display or a helmet-mounted display and were accompanied by either localized, nonlocalized, or no auditory information. The addition of localized auditory information resulted in significant increases in target detection performance and significant reductions in workload ratings as compared with conditions in which auditory ...
The objective of this research was to determine the effect of competition on the cost of aircraft replenishment spare parts. A conceptual model was presented which depicts the relationships between the various cost factors and the identifiable benefits of competition. It indicates that the net savings (loss) accompanying a shift from sole-source to competitive procurement is a function of gross savings (loss) in procurement dollars, procurement data costs, administrative costs, ...
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