41,581 to 41,590 of 42,164 Results
Apr 19, 1993
Mal, A. K.; Lih, S.-S.; Bar-Cohen, Y., 1993, "Nondestructive Characterization of the Elastic Constants of Fiber Reinforced Composites", https://hdl.handle.net/2014/34953, La Jolla, California, USA, JPL Open Repository
Composite structural components may be subjected to a variety of defects resulting in a sharp reduction in their load carrying capacity or even catastrophic failure...A nondestructive method based on ultrasonics has recently been developed for the quantitative evaluation of compo... |
Apr 19, 1993
Rahman, Z.; Spanos, J.; O'Brien, J.; Chu, C., 1993, "Optical Pathlength Control Experiment on JPL Phase B Testbed", https://hdl.handle.net/2014/34901, La Jolla, California, USA, JPL Open Repository
An experimental implementation of a nanometer level optical pathlength control for large baseline space interferometry is presented. The pathlength compensation system is installed on a large flexible experimental truss, thus structural motions play a dominant role in the control... |
Apr 19, 1993
Salama, M.; Umland, J.; Bruno, R.; Garba, J., 1993, "Adaptive Adjustment of a Precision Truss Structure: Experimental Validation", https://hdl.handle.net/2014/34938, La Jolla, California, USA, JPL Open Repository
Previous analytical studies have shown the feasibility of using a limited number of active members to adaptively alter the structural shape or behavior to other desired states. As a demonstration of this concept, this paper describes the results of a sequence of validation tests,... |
Apr 19, 1993
Thakoor, S., 1993, "Optically Addressable Ferroelectric Memory and its Applications", https://hdl.handle.net/2014/35181, Colorado Springs, Colorado, USA, JPL Open Repository
The objective of this task was to critically assess the potential of the concept of |
Apr 18, 1993
Chen, G.S.; Bidinger, G.M.; Lou, M.C., 1993, "Impact Damage Tolerance of Thin Wall Composite STRUTS", https://hdl.handle.net/2014/34909, La Jolla, California, USA, JPL Open Repository
An experimental investigation was made to study the impact damage tolerance of thin wall composite struts made of both brittle epoxy and toughtened epoxy based composite materials. |
Apr 18, 1993
Jackson, H.W.; Barmatz, M.; Wagner, P., 1993, "Transient Temperature Behavior of a Sphere Heated by Microwaves", https://hdl.handle.net/2014/35091, Cincinnati, Ohio, USA, JPL Open Repository
We have developed a model for microwave heating of a sphere in a rectangular resonant cavity. The model calculates transient temperature distributions within a sphere during the approach to steady state conditions or on the path to thermal runaway. |
Apr 18, 1993
McDonough, C.; Barmatz, M.; Jackson, H., 1993, "Application of Boltzmann-Ehrenfest Principle to Containerless Microwave Processing in Microgravity", https://hdl.handle.net/2014/35182, ['The American Ceramic Society', 'Cincinnati, Ohio, USA'], JPL Open Repository
The Boltzmann-Ehrenfest principle of adiabatic invariance has been applied to a resonant microwave cavity containing a dielectric sphere. |
Apr 16, 1993
Schumaker, Bonnie L.; Ulvestad, James S.; Agronin, Michael L., 1993, "POINTS (Precision Optical INTerferometer in Space)", https://hdl.handle.net/2014/35177, Orlando, FL, JPL Open Repository
POINTS is a high-precision, high-throughput interferometer intended for astromomy only. It can perform science compatable with astrophysics (AIM) and planet detection (TOPS-1). The spacecraft will be compact, lightweight, and suitable for high Earth orbit. It will employ the mini... |
Apr 16, 1993
Bothun, Gregory D.; Schombert, James M.; Impey, Christopher D.; Sprayberry, David; McGaugh, Stacy S., 1993, "The Small Scale Environment of Low Surface Brightness Disk Galaxies", https://hdl.handle.net/2014/35041, USA, JPL Open Repository
We use a sample of ~340 low surface brightness (LSB) disk galaxies with measured redshifts in combination with the Center for Astrophysics redshift survey to test the hypothesis that LSB galaxies have a deficit of nearby companion galaxies compared to high surface brightness (HSB... |
Apr 16, 1993
Cunningham, Thomas J.; Gee, Russell; Fossum, Eric R.; Baier, Steven M., 1993, "Noise and Electrical Characteristics below 10 K of small CHFET Circuits and Discrete Devices", https://hdl.handle.net/2014/35332, Orlando, Florida, USA, JPL Open Repository
This paper discusses the lates results of a continuing study of the properties of the complementary heterojunction field-effect transistor (CHFET) at 4K. The electrical characteristics, including the gate leakage current and the subthreshold transconductance, and the input-referr... |