This document describes a system designed to study the feasibility of augmenting tolerance to acceleration stress using external pressure pulsations synchronized to the electrocardiogram. The system, known as synchronized pulsating anti-gravity suit, consists of a modified G Suit, a controller and a pneumatic subsystem. The modified suit has individual bladders for calf, thigh, and abdomen with separate inlet/outlet ports. A microcomputer controls the synchronization, phasing and sequencing of pressure pulses ...
The rate of chalcopyrite dissolution by ferric sulfate solution can be enhanced by the presence of conductive carbon particles. The addition of carbon has been found to increase the leaching rate of chalcopyrite by as much as a factor of four. The importance of carbon in the enhanced leaching of chalcopyrite has been discussed in previous publications. The same rate increase has been found to prevail for the initial reaction ...
It has been shown that the absorptance of coated and uncoated germanium samples varies with surface state and ambient atmosphere. Absorption measurements made in air are up to 50 percent higher than identical measurements made under vacuum. The removable surface absorption on germanium has been shown to be due to both hydrocarbon and water layers, depending on the previous cleaning and ambient conditions. The residual surface absorption depends on the ...
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