Photon-coupled isolation switch Quarterly report, 1 Jul. - 30 Sep. 1967

Development of gallium arsenide laser diode with silicon phototransistor for optical isolation switc

Development of a microelectronic module Final report

Feasibility of operating gallium arsenide devices in high temperature microelectronic circuit

An exploratory study of mental health providers\u27 awareness of internalized oppression of women who experience same-sex intimate partner violence

This exploratory study\u27s purpose was to examine mental health providers\u27 awareness of the intersecting and compounding internalized oppressions (racism, sexism and homophobia) of women who experience same-sex intimate partner violence. The research attempted to address the question: Are mental health providers aware of the internalized oppressions among women who are in same-sex relationships in which intimate partner violence occurs? A qualitative study was conducted using a semi-structured, self-designed interview guide with open-ended questions. The sample included a total of twelve mental health providers recruited using a non-probability, convenience method. The findings indicate all twelve participants were aware of internalized oppressions experienced by their clients. In addition, eight participants believed these oppressions intersected. Ten participants perceived a relationship between internalized oppressions and the violence. Additional research is necessary to further understand the relationship between these variables and enhance clinical intervention

Effects of Domestic Wastewater Effluent on the Water Quality and Aquatic Macroinvertebrates in a Sharp County, Arkansas Stream

The purpose of this study was to determine whether the effluent of the Ash Flat Wastewater Treatment Plant changes the water quality or aquatic macroinvertebrate community structure of North Big Creek. Weekly water samples were analyzed for pH, N, P, COD, TSS and fecal coliform bacteria from 17 June to 19 August 1992. Aquatic macroinvertebrates were collected biweekly using a Turtox Indestructible™ Dip Net, and density indices were calculated. Station 1, above the effluent, was a spring habitat. Fecal coliform, N, P, TSS and COD values were higher at this station, while the aquatic macroinvertebrate community was relatively simple. The effluent impact upon Station 2 was most obvious from the persistent presence of foam and filamentous algae. Moderating water temperature and enhanced nutrient supply has resulted in a more complex aquatic macroinvertebrate community with a lower numerical standing crop

Influence of tectonic folding on rockfall susceptibility, American Fork Canyon, Utah, USA

International audienceWe examine rockfall susceptibility of folded strata in the Sevier fold-thrust belt exposed in American Fork Canyon in north-central Utah. Large-scale geologic mapping, talus production data, rock-mass-quality measurements, and historical rockfall data indicate that rockfall susceptibility is correlated with limb dip and curvature of the folded, cliff-forming Mississippian limestones. On fold limbs, rockfall susceptibility increases as dip increases. This relation is controlled by several factors, including an increase in adverse dip conditions and apertures of discontinuities, and shearing by flexural slip during folding that has reduced the friction angles of discontinuities by smoothing surface asperities. Susceptibility is greater in fold hinge zones than on adjacent limbs primarily because there are greater numbers of discontinuities in hinge zones. We speculate that susceptibility increases in hinge zones as fold curvature becomes tighter

A Model of IceWedge Polygon Drainage in Changing Arctic Terrain

As ice wedge degradation and the inundation of polygonal troughs become increasingly common processes across the Arctic, lateral export of water from polygonal soils may represent an important mechanism for the mobilization of dissolved organic carbon and other solutes. However, drainage from ice wedge polygons is poorly understood. We constructed a model which uses cross-sectional flow nets to define flow paths of meltwater through the active layer of an inundated low-centered polygon towards the trough. The model includes the eects of evaporation and simulates the depletion of ponded water in the polygon center during the thaw season. In most simulations, we discovered a strong hydrodynamic edge eect: only a small fraction of the polygon volume near the rim area is flushed by the drainage at relatively high velocities, suggesting that nearly all advective transport of solutes, heat, and soil particles is confined to this zone. Estimates of characteristic drainage times from the polygon center are consistent with published field observations

A Model of IceWedge Polygon Drainage in Changing Arctic Terrain

As ice wedge degradation and the inundation of polygonal troughs become increasingly common processes across the Arctic, lateral export of water from polygonal soils may represent an important mechanism for the mobilization of dissolved organic carbon and other solutes. However, drainage from ice wedge polygons is poorly understood. We constructed a model which uses cross-sectional flow nets to define flow paths of meltwater through the active layer of an inundated low-centered polygon towards the trough. The model includes the eects of evaporation and simulates the depletion of ponded water in the polygon center during the thaw season. In most simulations, we discovered a strong hydrodynamic edge eect: only a small fraction of the polygon volume near the rim area is flushed by the drainage at relatively high velocities, suggesting that nearly all advective transport of solutes, heat, and soil particles is confined to this zone. Estimates of characteristic drainage times from the polygon center are consistent with published field observations

Diamond degradation in hadron fields

The energy dependence of the concentration of primary displacements induced by protons and pions in diamond has been calculated in the energy range 50 MeV - 50 GeV, in the frame of the Lindhard theory. The concentrations of primary displacements induced by protons and pions have completely different energy dependencies: the proton degradation is very important at low energies, and is higher than the pion one in the whole energy range investigated, with the exception of the delta33 resonance region. Diamond has been found, theoretically, to be one order of magnitude more resistant to proton and pion irradiation in respect to silicon.Comment: 7 pages, 3 figure