Results 261 to 270 of about 78,383 (300)

Shuttle Environment Effects On Coated Mirrors

SPIE Proceedings, 1987
oated 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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Effects of Delta Wing Separation on Shuttle Dynamics

Journal of Spacecraft and Rockets, 1973
The unsteady aerodynamics of a candidate delta-wing shuttle orbiter have been investigated. Three potentially dangerous flow separation phenomena involving the delta wing have been identified, each of which could seriously compromise the flight dynamics.
J. PETER REDING, LARS E. ERICSSON
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Reliability of Space-Shuttle Pressure Vessels with Random Batch Effects

Technometrics, 2000
In 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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Hydrogen shuttling effect of azaaromatics in the hydrogenolysis of the diarylmethane

Fuel, 1989
Abstract The effects of hydrogen shuttling encountered in coal liquefaction have been discussed by using 2- and 3-ring azaaromatics and aromatic hydrocarbons as hydrogen shuttlers in the hydrogenolysis of 9-benzylphenanthrene in tetralin at 430 °C.
Shigeru Futamura, Seiya Koyanagi, Yoshio Kamiya   +2 more
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Effects of amphetamine on shuttle-box performance of hamsters

Pharmacological Research Communications, 1970
Summary Golden and albino hamsters showed poor avoidance responding in the shuttle-box. The administration of amphetamine in pretrained animals clearly improved performance. Results are discussed in relation to a possible disinhibitory effect of the drug and to a consequent increase in the vigilance level.
Mario Sansone, Paolo Renzi
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Dynamic Effects from the Space Shuttle Liftoff

Engineering, Construction, and Operations in Space V, 1996
This paper presents a study of the dynamic effects of the Space Shuttle launches on the ground support structures at Launch Pad 39A at the NASA-Kennedy Space Center. Pressure and structural acceleration data recently recorded at the Kennedy Space Center in support of a 1990-1992 study were reviewed and incorporated with additional recordings of similar
Barsoum, Fady F., Carroll, William F.
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Effects of low attenuation in a nanomechanical electron shuttle

Journal of Applied Physics, 2004
We have measured the spectral current characteristics of a nanomechanical electron shuttle in a tuning-fork configuration. This particular design enhances the quality factor Q of the nanoelectromechanical system. Comparing the experimental results to a precedingly studied low-Q device, we find a substantially different current behavior, indicating an ...
Dominik V. Scheible, Christoph Weiss, Robert H. Blick   +2 more
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Modeling and experiment of shuttling speed effects on the OSTRYCH

Applied Thermal Engineering, 2011
Abstract A novel OScillatory TheRmal cYcler CHamber (OSTRYCH) has been designed and fabricated in our work. The sample is placed in a fixed chamber, and three constant isothermal zones are established and lined up in the system. The sample is oscillated and comes into contact with three different isothermal zones to complete thermal cycles.
Jyh Jian Chen, Yao Tsung Yang
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Surfactant adsorption rather than “shuttle effect”?

Chemical Engineering Science, 2005
Abstract In the absence of chemical reaction, mass transfer enhancement by suspended particles (mostly activated carbon) at the gas/liquid interface has been frequently reported and is usually explained by a “shuttle mechanism” exerted by particles with a high adsorption capacity for the transfer component.
Aydin Kaya, Adrian Schumpe
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Amphetamine effects on poor performance of rats in a shuttle-box

Psychopharmacologia, 1966
In rats which showed consistently low rates of avoidance in the shuttle-box, in spite of extensive training, d-amphetamine caused a significant increase in performance. l-Amphetamine also stimulated these rats (type II poor performers) to better performance, but was much less potent.
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