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Carryin' On in the Lesbian and Gay South
To date, lesbian and gay history has focused largely on the East and West coasts, and on urban settings such as New York and San Francisco. The American South, on the other hand, identified with religion, traditional gender roles, and cultural conservatism, has escaped attention. Southerners celebrate their past; lesbians and gays celebrate their new-found visibility; historians celebrate the South—yet rarely have the three crossed paths. John Howard's groundbreaking anthology casts its net widely, examining lesbian and gay experiences in Mississippi, South Carolina, Georgia, Florida, Louisiana, and Tennessee. James Schnur, by virtue of a Freedom of Information Act query, sheds light on th...
An Analytical Investigation of the Effect of Nozzle Throat Radius of Curvature on Gasdynamic Laser Gain
Numerical solutions for CO2-N2 gasdynamic laser gain and maximum available power are used to examine the influence of nozzle throat radius of curvature and throat height on laser performance. Conventional gasdynamic laser nozzles incorporate minimum length supersonic contours with sharp throats in order to obtain rapid vibrational freezing of the gas. The study considers the effect of complete rounding of the throat (on both the subsonic and supersonic sides), up to a radius of cruvature equal to three throat heights. Such rounding allows easier manufacture and alignment of the nozzles, and should result in improved flow quality. The present results show a 15-percent reduction in laser gain and maximum available power due to complete rounding of the throat. (Author).
Progress in High Temperature Physics and Chemistry
Progress in High Temperature Physics and Chemistry
Journal
None
Investigation of a Rapid-quench Sampling Probe for Nonequilibrium Air Flows
Shock tunnel experiments in air are reported which basically were designed to determine the free-stream composition from the gaseous composition of a captured sample. The sample was obtained with an explosively-sealed probe. Because of the rapid cooling of the captured sample by the probe, it was anticipated that the temperature of the sample would be sufficiently low to result in the conversion of the captured NO to NO2. An attempt was made to infer the NO concentration of the free stream by measuring both the NO2 concentration and the resultant O2 deficiency in the sample. It was found that these measurements were limited by several considerations. Among these were chemisorption of NO2 on ...
