41,871 to 41,880 of 42,221 Results
Jan 1, 1993
Hastrup, R.; Cesarone, R.; Miller, A., 1993, "Mars Relay Satellite: Key to Enabling Low-Cost Exploration Missions", https://hdl.handle.net/2014/36286, ['Acta Astronautica', 'International Academy of Astronautics (IAA): Conference on Low-Cost Planetary Missions', 'Laurel, Maryland'], JPL Open Repository
Recently, there has been increasing evidence of a renewed focus on Mars exploration both by NASA and the international community. The thrust of this renewed interest appears to be manifesting itself in numerous low-cost missions employing small, light weight elements, which utili... |
Jan 1, 1993
Liu, Huang-Kuang; Wu, John, 1993, "An Unipolar Terminal-Attractor Based Neural Associative Memory with Adaptive Threshold and Perfect Convergence", https://hdl.handle.net/2014/34970, ['Optics Letters', 'Optical Society of America: Neural Networks', 'Denver, CO'], JPL Open Repository
For the first time, a unipolar terminal-attractor based neural associative memory (TABAM)system with adaptive threshold and perfect convergence is presented. By adaptively setting thethreshold values for the dynamic iteration for the unipolar binary neuron states with terminal-at... |
Jan 1, 1993
Halpern, D., 1993, "Progress of Space Studies of the Earthճ Surface, Meteorology, and Climate 1992- 1993", https://hdl.handle.net/2014/36478, ['Highlights in Space: Progress in Space Science, Technology and Applications 1994', 'United Nations, New York'], JPL Open Repository
This report briefly summarizes the progress made by satellite-dependent systems that are necessary to accomplish global earth monitoring and associated studies of the interactions between the earth's atmosphere, land surface, and ocean. |
Jan 1, 1993
Lin, T.; Park, J. S.; Gunapala. S. D.; Jones, E. W.; del Castillo, H. M., 1993, "Tailorable Doping-Spike PtSi Infrared Detectors Fabricated by Si Molecular Beam Epitaxy", https://hdl.handle.net/2014/36017, ['1993 International Conference on Solid State Devices and Materials', 'Chiba, Japan', 'Japan Journal of Applied Physics'], JPL Open Repository
By incorporating a 1-nm-thick p+ doping spike at the PtSi/Si interface, we have successfullydemonstrated extended cutoff wavelengths of PtSi Schottky infrared detectors. The extended cutoffwavelengths resulted from the reduced effective potential barriers due to the combined effe... |
Jan 1, 1993
Israelsson, U. E.; Strayer, D. M.; Chui, T. C. P.; Duncan, R. V., 1993, "Dynamic Measurements Near the Lambda-point in a Low-G Simulator on the Ground", https://hdl.handle.net/2014/35028, ['Physica B', 'LT-20 Low Temperature Physics Conference', 'Eugene, Oregon'], JPL Open Repository
The properties of liquid helium very near the lambda-transition in the presence of a heat current has received recent theoretical and experimental attention. In this regime, gravity induced pressure effects place severe constraints on the types of experiments that can be performe... |
Jan 1, 1993
Kuiper, T. B. H.; Whiteoak, J. B.; Peng, R.-S.; Peters, W. L. III.; Reynolds, J. E., 1993, "Refrigeration of the 18.3 GHz C_3H_2 Transition in Dark Clouds G1.6-0.25", https://hdl.handle.net/2014/35754, Astrophysical Journal (Letters), JPL Open Repository
We have observed the 1_(10)-1_(01) (18.3 GHz) transition of orthocyclopropenylidene, C_(-3)H_(-2), at 24 positions in the unusual dense cloud G1.6- 0.025. Except for one position, the transition is refrigerated, a phenomenon which has not been seen in this transition before. |
Jan 1, 1993
Madore, B.; Sun, H.; Bennett, J.; Corwin, J. Jr.; Helou, G.; Lague, C.; Schmitz, M.; Wu, X., 1993, "Revised Sizes and Positions for the Mailyan Dwarf Galaxy Cataolgue", https://hdl.handle.net/2014/35885, JPL Open Repository
This paper presents new positions, revised sizes, and sample cross-identifications for dwarf galaxies discovered and published by Mailyan in 1973. |
Jan 1, 1993
Carlson, R. W.; Kamp, L. W.; Baines, K. H.; Pollack, J. B.; Grinspoon, G. H.; Encrenaz, T.; Drossart, P.; Taylor, F. W., 1993, "Variations in Venus Cloud Particle Properties", https://hdl.handle.net/2014/35734, n/a, JPL Open Repository
Using Venus nightside data obtained by the Galileo Near Infrared Mapping spectrometer, we hav studied the correclation of 1.74 and 2.30 m radiation which is transmitted through the clouds. |
Jan 1, 1993
Bourhill, G.; Bredas, J-L.; Cheng, L-T.; Marder, S. R.; Meyers, F.; Perry, J. W.; Tiemann, B. G., 1993, "Experimental Demonstration of the Dependence of the First Hyperpolarizability of Donor-Acceptor Substituted Polyenes on the Ground-State Polarization and Bond Length Alternation", https://hdl.handle.net/2014/36576, NA, JPL Open Repository
The dependence of the product of the first hyperpolarizability, beta, and the ground-state dipole moment, mu, for a series of donor-acceptor polyenes with a large range of ground-state polarization, was measured in a variety of solvents by electric field induced second harmonic g... |
Jan 1, 1993
Gao, B. C.; Goetz, A. F. H.; Westwater, E. R.; Conel, C. E.; Green, R. O., 1993, "Possible Near-IR Channels for Remote Sensing Precipitable Water Vapor from Geostationary Satellite Platforms", https://hdl.handle.net/2014/35960, ['Future Publication', 'American Meteorology Society', 'USA'], JPL Open Repository
Remote sensing of tropospheric water vapor profiles from current geostationary weather satellites are made using a few broadband infrared (IR) channels in the 6 to 13- micrometers region. Uncertainties greater than 20 percent exist in derived water vapor values just above the sur... |