Results 261 to 270 of about 241,910 (308)
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Shuttle Environment Effects On Coated Mirrors
SPIE Proceedings, 1987oated mirrors used in optical instrument payloads designed for use at ultraviolet wave-lengths face the risk that molecular contamination, in small amounts, can degrade reflectivity. This can be particularly damaging if a combination of solar ultraviolet radiation and organic gases are present, resulting in photopolymerization of hydrocarbon tars onto ...
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Effect of gap flow on shuttle heat transfer
Cryogenics, 2000A comprehensive analysis is performed to investigate the effect of the oscillating flow of gap fluid on the shuttle heat transfer in reciprocating expanders. For a sinusoidal motion of displacer over cylinder having an axial temperature gradient, a new exact expression for shuttle heat transfer is derived from the analytical solution of the velocity ...
Ho-Myung Chang +2 more
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Catalytic surface effects experiment on the Space Shuttle
16th Thermophysics Conference, 1981A Space Shuttle experiment planned to measure the surface catalytic efficiency of the baseline high-temperature reusable surface insulation (HRSI) during earth entry is described. A spray-on overcoat, with high catalytic efficiency, will be used as a comparative basis for determining the HRSI surface catalytic efficiency through surface temperature ...
D. STEWART, J. RAKICH, M. LANFRANCO
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Effective placement of chips on a shuttle mask
SPIE Proceedings, 2003An effective algorithm was developed to prepare a mask layout from several chip databases. The underlying idea is solving so called “strip packing” problems, which actually have been very common in many industries. A major difference between applications is the definition of cost function used in a particular packing problem.
Shih-Ying Chen, Eric C. Lynn
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Thyroid Status of Space Shuttle Crewmembers: Effects of Iodine Removal
Aviation, Space, and Environmental Medicine, 2011Iodine is often used for water purification and has been used throughout the U.S. space program. Because of concern about potential effects on crewmembers' thyroid function, in 1997 a system was implemented on board the Space Shuttles to remove iodine from water before it was consumed.
Scott M, Smith +3 more
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Effects of potential environmental interferents on kinesin-powered molecular shuttles
Nanoscale, 2012Biomolecular motor-powered active transport represents an alternate means for analyte processing in nanoscale biosensors and bioanalytical devices. For example, a prototype "smart dust" biosensor has recently been reported in which the motor protein kinesin processes antibody-functionalized microtubules (MTs) to capture and separate optically tagged ...
Marlene, Bachand, George D, Bachand
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Effects of stimulus modality on the shuttle activity in rats
Behavioural Brain Research, 2004Shuttle activity during repeated presentation of irrelevant auditory (white band noise) and visual (darkness) stimuli was studied in 32 male Möll-Wistar rats. The subjects were randomly divided into two groups. In Group ND the auditory stimulus was used in the first habituation session, and the visual stimulus in the second habituation session.
Tomasz, Werka +2 more
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Environmental effects of Shuttle launch and landing
Shuttle Environment and Operations Meeting, 1983The areas of concern were the toxic exhaust cloud produced by Shuttle launch, the effect of launch operations on the total ecology, and the sonic boom produced by Orbiter re-entry. Wet acidic dust fell from the exhaust cloud for about ten minutes after launch.
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Effect of lesions in hippocampal subareas on rat shuttle behavior
Physiology & Behavior, 1979Abstract Rats with lesions in subareas CA3 and CA4/dentate gyrus of the dorsal hippocampus were submitted to four different experimental situations in a shuttlebox. Animals with CA3 lesions made less shuttle responses to a buzzer than sham-operated or intact control animals in two of the tests, in which the buzzer was paired (i.e., given contiguous ...
Calderazzofilho, L. S. +2 more
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Reliability of Space-Shuttle Pressure Vessels with Random Batch Effects
Technometrics, 2000In this article we revisit the problem of estimating the joint reliability against failure by stress rupture of a group of fiber-wrapped pressure vessels used on Space-Shuttle missions. The available test data were obtained from an experiment conducted at the U.S.
Alan H. Feiveson, Pandurang M. Kulkarni
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