Instrumentation for measuring aircraft noise and sonic boom [PDF]
, 1976 Improved instrumentation suitable for measuring aircraft noise and sonic booms is described. An electric current proportional to the sound pressure level at a condenser microphone is produced and transmitted over a cable and amplified by a zero drive ...
Zuckerwar, A. J.
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Development of a ninety string solar array simulator [PDF]
A power source was developed to support testing for the Space Station Freedom Power Management and Distribution (PMAD) DC Testbed. The intent was to simulate as closely as possible the steady-state and transient responses of a solar array.
Birchenough, Arthur G., Vasek, Thomas E.
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PERFORMANCE OF SCREW HORIZONTAL AND BRIDGE LINKAGE PHOTOVOLTAIC ARRAY CONFIGURATIONS
Journal of Engineering and Sustainable DevelopmentDue to partial shading effects on the productivity of solar panels which in turn negatively impacts the performance characteristics of photovoltaic systems, researchers work on different studies to overcome this phenomenon and improve solar system ...
Mohammed Osamah Subhi +1 more
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Low-voltage programming of RRAM-based crossbar arrays using MOS parasitic diodes
Frontiers in NanotechnologyDue to their high density, scalability, and low-power properties, 1-transistor-1-resistor (1T1R) RRAM-based crossbars have been exploited in the past. However, the series resistance of the transistor is a major problem in 1T1R crossbar arrays.
Sachin Maheshwari +2 more
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COMSAT Laboratories' on-board baseband switch development [PDF]
Work performed at COMSAT Laboratories to develop a prototype on-board baseband switch is summarized. The switch design is modular to accommodate different service types, and the architecture features a high-speed optical ring operating at 1 Gbit/s to ...
Inukai, Thomas +4 more
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Experimental and Simulation for the Effect of Partial Shading on Solar Panel Performance
Journal of Engineering, 2016 Partial shading is one of the problems that affects the power production and the efficiency of photovoltaic module. A series of experimental work have been done of partial shading of monocrystalline PV module; 50W, Isc: 3.1A, Voc: 22V with 36 cells in ...
Emad Talib Hahsim, Ass. Prof. Dr. +1 more
doaj
Development and performance of power processor system for 2-gigahertz, 200-watt amplifier for communications technology satellite [PDF]
The electrical and environmental requirements for a power processor system (PPS) designed to supply the appropriate voltages and currents to a 200-watt traveling wave tube (TWT) for a communication technology satellite is described.
Gourash, F. +2 more
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Turbomachinery technology for high-speed civil flight [PDF]
NASA Lewis' research and technology efforts applicable to turbomachinery for high-speed flight are discussed. The potential benefits and cycle requirements for advanced variable cycle engines and the supersonic throughflow fan engine for a high-speed ...
Glassman, Arthur J., Saunders, Neal T.
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Review and test of chilldown methods for space-based cryogenic tanks [PDF]
The literature for tank chilldown methods applicable to cryogenic tankage in the zero gravity environment of earth orbit is reviewed. One method is selected for demonstration in a ground based test.
Chato, David J., Sanabria, Rafael
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Automatic control of liquid cooling garment by cutaneous and external auditory meatus temperatures [PDF]
An automatic control apparatus for a liquid cooling garment is described that is responsive to actual physiological needs during work and rest periods of a man clothed in the liquid cooling garment.
Fulcher, C. W. G.
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