33,549 research outputs found
Values-Based Leadership: How Our Personal Values Impact the Workplace
As an individual’s personal values ostensibly impact others and influence their actions, values-based leaders can benefit greatly by exercising their own values to develop vision and to inspire others
Results of tests of MTA-2 TPS on the SRB hold-down bolt blast container
The four solid rocket booster (SRB) hold-down posts are fastened to the mobile launch platform (MLP) with four large nuts. At liftoff the nuts are split with explosive changes to release the SRB/Shuttle. A blast container is placed over the nuts to protect the vehicle from flying debris. The blast container is a reusable part and has to be protected from aerodynamic heating during flight. The thermal protection system (TPS) used to protect these blast containers is cork. Fitting the flat cork sheet to this hemispherical shaped blast container is both time consuming and expensive. Another problem is removing the charred cork and epoxy glue from the blast containers. Replacements of this cork with another TPS material such as MTA-2 was examined. Heating rates along the centerline of the forward facing areas of the blast container were determined. The feasibility of using 1/2 in. MTA-2 on the SRB blast containers for protection from ascent, plume impingement and reentry heating is demonstrated
Distribution of Naegleria fowleri in Selected Northeast Arkansas Lakes
Seven northeast Arkansas recreational lakes were examined for the presence of pathogenic and nonpathogenic Naegleria fowleri. Cultural differentiation and microscopic morphology were used as species determining tests, while mouse pathogenicity tests were conducted to determine virulence. Only one isolate met all criteria utilized for definite identification of Naegleria fowleri, although Naegleria type organisms were found in all of the lakes. None of the isolates were pathogenic in mice
Magnetic Solutions to 2+1 Gravity
We report on a new solution to the Einstein-Maxwell equations in 2+1
dimensions with a negative cosmological constant. The solution is static,
rotationally symmetric and has a non-zero magnetic field. The solution can be
interpreted as a monopole with an everywhere finite energy density.Comment: 9 pages, harvmac; we correct a reference and a typ
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