537 research outputs found
Design integration and noise studies for jet STOL aircraft. Task 7C: Augmentor wing cruise blowing valveless system. Volume 2: Small-scale development testing of augmentor wing critical ducting components
Augmentor wing ducting system studies conducted on a valveless system configuration that provides cruise thrust from the augmentor nozzles have shown that most of the duct system pressure loss would occur in the strut-wing duct y-junction and the wing duct-augmentor lobe nozzles. These components were selected for development testing over a range of duct Mach numbers and pressure ratios to provide a technical basis for predicting installed wing thrust loading and for evaluating design wing loading of a particular wing aspect ratios. The flow characteristics of ducting components with relatively high pressure loss coefficients were investigated. The turbulent pressure fluctuations associated with flows at high Mach numbers were analyzed to evaluate potential duct fatigue problems
The Occurrence of Rhopilema verrilli (Cnidaria: Scyphozoa: Rhizostomeae) on Galveston Island, Texas, and a Discussion on Its Distribution in U.S. Waters
A specimen of the rhizostome scyphomedusa Rhopilema verrilli was stranded on the beach at Galveston Island, Texas, in the spring of 1985. Two young specimens have since been collected In the marshes on the north side of Galveston bordering West Galveston Bay. This species Is relatively rare throughout most of Its range and has only been reported once before in the western Gulf of Mexico.
Seasonal and geographic distributions from literature records are discussed in relation to temperature, salinity, currents, and life history. Occurrences along the U.S. East Coast Indicate progressively later seasonal appearances and decreased abundances from Georgia to New England. Occurrences In the Gulf of Mexico are almost all limited to the Mississippi Sound area. Collection records suggest that R. verrilli has two centers of distribution, one in southern U.S. East Coast waters and one in the northeastern Gulf of Mexico, and that occurrences outside these centers are due to transport by currents. We believe that R. verrilli\u27s apparent rarity in the western Gulf of Mexico results primarily from a combination of wind-driven current patterns, timing of volume of Mississippi-Aatchafalaya River discharge, and temperature-salinlty tolerances of the species acting against transport into, and survival in, the western Gulf
Minor Elements in Kansas Salt
Mine run salt from three underground workings, raw brine, and some prepared salt products were examined spectrochemically for elements occurring in trace amounts. One mineral was isolated and determined to be a potassium-bearing mineral, tentatively identified as polyhalite (K2SO4·MgSO4·2CaSO4·2H2O). This mineral has not been reported previously from samples of commercially mined Kansas salt. One other mineral was isolated and identified as celestite (SrSO4). This mineral occurs with anhydrite in the ratio of 1:0.129 (CaSO4 x 0.129=SrSO4). The red color sometimes found in commercially mined rock salt usually accompanies the celestite but has not been directly associated with the celestite. This red material has been shown not to be Fe2O3, as might be suggested by the color
Oil Shale in Kansas
Shale oil can be produced from a number of black shale deposits in Kansas. This report presents the results of testing of samples of some of these black shales from 37 locations. Kansas oil shales are in general black platy to fissile shales composed of fine silt and clay-sized minerals. They contain a relatively large percentage of black to light-brown bituminous matter. When viewed in thin section normal to the bedding plane the organic matter appears as thin laminations, but when viewed from a section cut parallel to the bedding planes it appears as blotches. Obtainable yields of shale oil range from a slight trace to a maximum of 22.8 gallons per ton, and the average yield from favorable localities is from 6 to 12 gallons per ton. Most of the shales tested yield a large volume of gas concurrent with the oil. The average yield is about 1,230 cubic feet per ton of gas that shows from 30 to 45 percent hydrogen and a very high B.t.u. content. The average specific gravity of the shale oil ranges from 0.53 to 0.73 with the majority of the samples from 0.61 to 0.63. Determination of the gross heating value of the shale as a bulk fuel showed that much of the material contains from 1,000 to more than 3,000 B.t.u. per pound
Corporate Social Responsibility and the New Governance: In Search of Epstein\u27s Good Company in the Employment Context
The purpose of this Article is to apply Epstein’s Good Company framework to corporate behavior that falls under three distinct employment law issues31 that continually challenge TNCs as they conduct business. Part I summarizes Epstein’s Good Company framework and his insights about the Good Company. Part II integrates Epstein’s Good Company framework with TNCs’ ability to curb the use of abusive forms of child labor (enact responsible child labor policies), foster open, democratic, and collaborative workplaces (improved employer-employee bargaining), and to create an ethic of care for employees (ethic of care). Part III briefly analyzes our findings, suggests modifications to Epstein’s Good Company framework, and positions the modifications in the context of New Governance scholarship. The article concludes by affirming Epstein’s approach to the Good Company and offers final reflections about fostering Good Companies in the employment context
Planar lattice gases with nearest-neighbour exclusion
We discuss the hard-hexagon and hard-square problems, as well as the
corresponding problem on the honeycomb lattice. The case when the activity is
unity is of interest to combinatorialists, being the problem of counting binary
matrices with no two adjacent 1's. For this case we use the powerful corner
transfer matrix method to numerically evaluate the partition function per site,
density and some near-neighbour correlations to high accuracy. In particular
for the square lattice we obtain the partition function per site to 43 decimal
places.Comment: 16 pages, 2 built-in Latex figures, 4 table
Identification of a Novel Binding Partner of Phospholipase Cβ1: Translin-Associated Factor X
Mammalian phospholipase Cβ1 (PLCβ1) is activated by the ubiquitous Gαq family of G proteins on the surface of the inner leaflet of plasma membrane where it catalyzes the hydrolysis of phosphatidylinositol 4,5 bisphosphate. In general, PLCβ1 is mainly localized on the cytosolic plasma membrane surface, although a substantial fraction is also found in the cytosol and, under some conditions, in the nucleus. The factors that localize PLCβ1in these other compartments are unknown. Here, we identified a novel binding partner, translin-associated factor X (TRAX). TRAX is a cytosolic protein that can transit into the nucleus. In purified form, PLCβ1 binds strongly to TRAX with an affinity that is only ten-fold weaker than its affinity for its functional partner, Gαq. In solution, TRAX has little effect on the membrane association or the catalytic activity of PLCβ1. However, TRAX directly competes with Gαq for PLCβ1 binding, and excess TRAX reverses Gαq activation of PLCβ1. In C6 glia cells, endogenous PLCβ1 and TRAX colocalize in the cytosol and the nucleus, but not on the plasma membrane where TRAX is absent. In Neuro2A cells expressing enhanced yellow and cyano fluorescent proteins (i.e., eYFP- PLCβ1 and eCFP-TRAX), Förster resonance energy transfer (FRET) is observed mostly in the cytosol and a small amount is seen in the nucleus. FRET does not occur at the plasma membrane where TRAX is not found. Our studies show that TRAX, localized in the cytosol and nucleus, competes with plasma-membrane bound Gαq for PLCβ1 binding thus stabilizing PLCβ1 in other cellular compartments
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