Research and development program on magnetic electrical conductor, electrical insulation, and bore seal materials - Electrical conductor and electrical insulation materials topical report

Electrical, mechanical, and thermo-physical properties of conductor and insulation materials for application to advanced space electric power system

Behavior of LNG vapor clouds: wind-tunnel simulation of 40 M3 LNG spill tests at China Lake Naval Weapons Center, California: final report, (July 1979 - July 1981), The

CER81-82DEN-RNM1.July 1981.Includes bibliographical references.Final report, July 1979 - July 1981.For Gas Research Institute, contract no. 5014-352-0203

Data appendix to the behavior of LNG vapor clouds: wind-tunnel tests on the modeling of heavy plume dispersion: final report (July 1979-September 1981)

CER81-82DEN-RNM25.March 1982.Accompanying final report has title: The behavior of LNG vapor clouds: wind-tunnel tests on the modeling of heavy plume dispersion: final report, July 1979-September 1981.Visual and concentration measurements were made for a large number of continuous ground-level releases of heavy gases into a wind-tunnel boundary layer. These different plumes were not affected by any topographic or building wake influences. The experiments provided a broad coverage of the variable range of source gas specific gravity, source gas flow rate, and approach flow wind speed. From an investigation of the physical similarity between plumes, the permissible modeling distortion in source density, volume flux ratio, and length scale ratio was quantified. The concentration scaling theory which was previously limited to far-field behavior was extended to cover the entire range of plume concentrations. Generalized behavior models were constructed from the laboratory tests. These models were scaled up to atmospheric conditions. The range of atmospheric scenarios to which these laboratory data are applicable is summarized. Measurements on the behavior of transient dense plumes were also obtained.For Gas Research Institute contract no. 5014-352-0203

Mate choice for nonadditive genetic benefits and the maintenance of genetic diversity in song sparrows

The lek paradox asserts that strong directional selection via female choice should deplete additive genetic variation in fitness and consequently any benefit to females expressing the preference. Recently, we have provided a novel resolution to the paradox by showing that nonadditive genetic effects such as overdominance can be inherited from parent to offspring, and populations with females that express a mating preference for outbred males maintain higher genetic variation than populations with females that mate randomly. Here, we test our dynamic model using empirical data previously published from a small island population of song sparrows (Melospiza melodia). The model assumes that fitness and male trait expression display overdominance effects. The results demonstrate that female choice for outbred males mediated by directional selection on song repertoire size provides a heritable benefit to offspring through reduced inbreeding depression. Within the population, we estimate the heritability of the inbreeding coefficient to be 0.18 +/- 0.08 (SD). Furthermore, we show that mate choice for outbred males increases fitness-related genetic variation in the population by 12% and thereby reduces inbreeding depression by 1% per generation in typical years and upwards of 15% in severe years. Thus, mate choice may help to stave off population extinction in this and other small populations

Letters between Andrew L. Neff and William Kerr\u27s secretary

Letters concerning a position in the history department at Utah Agricultural College

Behavior of LNG vapor clouds: wind-tunnel tests on the modeling of heavy plume dispersion: final report, July 1979-September 1981, The

CER81-82DEN-RNM25.March 1982.Accompanying appendix has title: Data appendix to The behavior of LNG vapor clouds: wind-tunnel tests on the modeling of heavy plume dispersion: final report, July 1979-September 1981.Includes bibliographical references.For Gas Research Institute, contract no. 5014-352-0203

Wind tunnel study on plume dispersion at the Savannah River project

CER83-84DEN-RNM-25.E. I. DuPont Company, Savannah River Laboratory.December 1983.Includes bibliographical references (page 50)

Heat transfer effects during cold dense gas dispersion

Final report.November 1983.Includes bibliographical references.CER83-84-GA-DEN-RNM3.GRI-83-0082.Wind tunnel concentration data were obtained for continuous area releases of isothermal, cold N2, cold CO2 and cold CH4 clouds. Wind tunnel results were compared to field test results and to a computer model simulation. Heat transfer and humidity effects on model concentration distributions were significant for methane plumes when surface Richardson numbers, Rix, were large (i.e. low wind speed and high boiloff rates conditions). At field scales heat transfer and humidity still play a role in the dispersion of methane spill cases, but plume dilution and lift off are not as exaggerated as for the-model cases.For Gas Research Institute, Contract No. 5014-352-0203

Dispersion of vapor from LNG spills: simulation in a meteorological wind tunnel

CER76-77RNM-JEC-DEN-MM57.Under contract to R & D Associates, Marina del Ray (C.A.).Includes bibliographical references (page 35).May 1977

LNG plume interaction with surface obstacles: final report, September 1980-September 1982

September 1981.CER81-82KMK-RNM-DEN22.Includes bibliographical references.Prepared for Gas Research Institute, Contract No. 5014-352-0203