41,581 to 41,590 of 42,163 Results
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... |
Apr 16, 1993
Thomas J. Cunningham; Mazed, Mohammad; Holtzman, Melinda J.; Fossum, Eric R., 1993, "Cosmic-ray Detector with Interdigitated-Finger Pixels for two-dimensional Position Information from a Singel Wafer Side", https://hdl.handle.net/2014/35417, Orlando, Florida, USA, JPL Open Repository
This paper describes a type of cosmic ray detector for isotopic and energy detection of energetic nuclei which derives both dimensions of position information from one side of the detector. This simplifies the required readout electronics, since only one precision amplifier conne... |