205
205
Jul 5, 2010
07/10
by
Nicholas, G. W.; Hovland, D. N.; Belmont, A. D
texts
eye 205
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To improve the specification of stratospheric horizontal temperature and geopotential height fields from satellite radiation data, needed for high flying aircraft, a technique was derived to estimate data between satellite tracks using interpolated IRIS 15-micron data from Nimbus III. The interpolation is based on the observed gradients of the MRIR 15-micron radiances between subsatellite tracks. The technique was verified with radiosonde data taken within 6 hours of the satellite data. The...
Topics: LIGHTNING, PROTECTION, ENVIRONMENTAL TESTS
270
270
Jul 5, 2010
07/10
by
Farley, E. P
texts
eye 270
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Induction plasma heating techniques were studied for calcining zinc orthotitanate particles for use in thermal control coatings. Previous studies indicated that the optimum calcining temperature is between 1400 and 1750 C. An intermediate temperature (1670 C) was chosen as a reference point for running a temperature series at the reference point and 220 C on both sides. The effect of varying chamber temperature on the reflectance spectra, before and after vacuum UV irradiation, is presented....
Topics: DETONATORS, GAS VALVES, PERFORMANCE TESTS, BALLOONS, ENVIRONMENTAL TESTS
175
175
Jun 21, 2010
06/10
by
Loretsyan, Zh. M
texts
eye 175
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Microsurface thermal stability of astronomical mirrors fabricated from aluminum alloy with chromium and nickel coatings
Topics: MATHEMATICAL MODELS, RELIABILITY ENGINEERING, ENVIRONMENTAL TESTS, QUALITY CONTROL
232
232
Jun 12, 2011
06/11
by
Wrobel, K. E.; Schultz, P. H.; Crawford, D. A
texts
eye 232
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Following impact, vapor expansion creates an intense airblast that interacts with the ambient atmosphere. The resulting hemi-spherical shock wave leaves a signature on the surface that is dependent on initial atmospheric and surface conditions. Here we propose that the formation of pedestal craters (craters surrounded by an erosion-resistant pedestal) may be a direct consequence of extreme winds and elevated temperatures generated by such an impact-induced atmospheric blast. Pedestal craters,...
Topics: MECHANICAL PROPERTIES, HIGH TEMPERATURE, DIFFUSION, MICROSTRUCTURE, EMBRITTLEMENT, ENVIRONMENTAL...
210
210
Jul 5, 2010
07/10
by
ATSYUKOVSKIY, V. A
texts
eye 210
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THE NEED FOR MAXIMUM SIMPLIFICATION OF INFORMATION DEVICES, OF MEASURING, COMPUTING, AND CONTROL SYSTEMS, AND OF CONJUGATION UNITS IS POINTED OUT. EVALUATION OF THE INFORMATION CONTENT OF PROBLEMS AND OF THE INFORMATION CAPACITY OF UNITS IS PROPOSED. THE CONCEPT OF AN INFORMATION USE FACTOR FOR DEVICES IS INTRODUCED. IT IS SHOWN THAT THE MEAN INFORMATION USE FACTOR FOR ELEMENTS IN INFORMATION DEVICES IS EXTREMELY LOW, VARYING FROM 10 TO THE MINUS 15TH POWER (FOR DIGITAL COMPUTERS) TO .01 (FOR...
Topics: BALLOON SOUNDING, SOLAR GENERATORS, COMPONENT RELIABILITY, ENVIRONMENTAL TESTS, MECHANICAL...
266
266
Jul 5, 2010
07/10
by
BODULINSKIY, V. K.; MEDVEDYEV, Y. A
texts
eye 266
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THE CHARACTERISTICS METHOD OF ANALYSIS, EMPLOYING INTEGRAL TRANSFORMATIONS, WAS USED. IT DESCRIBES A PRIMARY DIMENSION PHYSICAL PHENOMENON: MAGNETIC FIELD COMPRESSION IN A COLLAPSING SPHERICAL CAVITY.
Topics: LOADS (FORCES), SATURN 5 LAUNCH VEHICLES, VIBRATION TESTS, CONFERENCES, ENVIRONMENTAL TESTS
194
194
Jun 21, 2010
06/10
by
Tashjian, H
texts
eye 194
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Computation of potential function of compressible fluid near Mach number 1
Topics: BLOCKING, GELS, PROPELLANT STORAGE, CONTAMINATION, ENVIRONMENTAL TESTS, IMPURITIES, PLUGGING,...
546
546
Jun 21, 2010
06/10
by
Heer, E.; Yang, J.-N
texts
eye 546
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Optimization design methods for spacecraft structural systems and subsystems
Topics: MARS 71 PROJECT, SPACECRAFT INSTRUMENTS, SYSTEMS ANALYSIS, ENVIRONMENTAL TESTS, SPACECRAFT...
244
244
Jul 11, 2010
07/10
by
Todd, P
texts
eye 244
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Plant and certain animal embryos appear to be responsive to the gravity vector during early stages of development. The convection of particle sedimentation as the basis for the sensing of gravity is investigated using the cells of wheat seedlings, amphibian embryos, and mammals. Exploration of the mammalian cell for sedimenting particles reveals that their existence is unlikely, especially in the presence of a network of microtubules and microfilaments considered to be responsible for...
Topics: DIGITAL SYSTEMS, MULTIPLEXING, DATA ACQUISITION, ENVIRONMENTAL TESTS, FLIGHT TESTS, PULSE CODE...
258
258
Jul 21, 2010
07/10
by
Willis, P
texts
eye 258
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A detailed summary of the diverse encapsulation materials and techniques that evolved to meet the cost goals of the Flat-plate Solar Array (FSA) Project is presented. A typical solar cell now consists of low iron glass, two layers of ethylene vinyl acetate (EVA) polymers, a porous space, primers/adhesives, a back cover of Tedlar, and a gasket/seal for a volume cost of 1.30/sq ft. This compares well with the project goal of 1.40/sq ft.
Topics: ANTENNA ARRAYS, ANTENNA COMPONENTS, GRAPHITE-EPOXY COMPOSITES, WAVEGUIDE ANTENNAS, ADHESIVES,...
268
268
Jun 27, 2010
06/10
by
Menees, G. P
texts
eye 268
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comment 0
No Abstract Available
Topics: INTAKE SYSTEMS, WIND TUNNEL STABILITY TESTS, AERODYNAMIC CONFIGURATIONS, ENVIRONMENTAL TESTS,...
283
283
Jun 21, 2010
06/10
by
Griffiths, P. R.; Lippincott, E. R.; Schuhmann, P. J.; Weiffenbach, C. K
texts
eye 283
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comment 0
No Abstract Available
Topics: COMMAND MODULES, ENVIRONMENTAL TESTS, FLOTATION, SCALE MODELS, BUOYANCY, ENVIRONMENT SIMULATION,...
322
322
May 30, 2010
05/10
by
Tysdal, R. M
texts
eye 322
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Environmental test program for Beacon Explorer spacecraft - optimization of thermal design and evaluation of current limiter
Topics: BEACON SATELLITES, BEACONS, ENVIRONMENTAL TESTS, EXPLORER SATELLITES, OPTIMIZATION, BEACON...
383
383
Jul 11, 2010
07/10
by
Merchant, D. H.; Straayer, J. W
texts
eye 383
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Methods are presented for calculating design limit loads compatible with probabilistic structural design criteria. The approach is based on the concept that the desired limit load, defined as the largest load occuring in a mission, is a random variable having a specific probability distribution which may be determined from extreme-value theory. The design limit load, defined as a particular value of this random limit load, is the value conventionally used in structural design. Methods are...
Topics: BANDS, MANUFACTURING, MECHANICAL DEVICES, ROLLERS, SUSPENSION SYSTEMS (VEHICLES), ENVIRONMENTAL...
317
317
Jun 21, 2010
06/10
by
Krawczoner, E. M.; Sloop, J. L
texts
eye 317
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comment 0
No Abstract Available
Topics: ACTUATORS, HYDRAULIC EQUIPMENT, SATURN S-4B STAGE, ENVIRONMENTAL TESTS, VALVES, VIBRATION TESTS
250
250
Jun 21, 2010
06/10
by
Baston, J. G
texts
eye 250
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Mariner 5 magnetic field control program
Topics: ATS, ENGINE DESIGN, ENVIRONMENTAL TESTS, THRUST CHAMBERS, APOGEES, FABRICATION, SOLID PROPELLANT...
621
621
Jul 5, 2010
07/10
by
Neal, L. G.; Wanous, D. J.; Clausen, O. W
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eye 621
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Results of an analytical study investigating the application of capillary pumping to the heat rejection loop of an advanced Rankine cycle power conversion system are presented. The feasibility of the concept of capillary pumping as an alternate to electromagnetic pumping is analytically demonstrated. Capillary pumping is shown to provide a potential for weight and electrical power saving and reliability through the use of redundant systems. A screen wick pump design with arterial feed lines was...
Topics: GLANDS (SEALS), PACKINGS (SEALS), TURBINE ENGINES, ENVIRONMENTAL TESTS, EQUIPMENT SPECIFICATIONS,...
334
334
Jun 21, 2010
06/10
by
Shapira, J
texts
eye 334
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Conversion of human wastes, carbon dioxide water, and urea into food for space rations
Topics: CERAMIC COATINGS, EMITTANCE, SPACE ENVIRONMENT SIMULATION, THERMAL RADIATION, THICKNESS,...
408
408
Jul 9, 2010
07/10
by
Akkerman, J. W
texts
eye 408
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A cryogenic liquid distribution system suitable for the reaction control system on space shuttles is described. The system thermodynamics, operation, performance and weight analysis are discussed along with the design, maintenance and integration concepts.
Topics: CHEMICAL ANALYSIS, CHEMICAL REACTIONS, PHYSICAL PROPERTIES, POLYMERS, ENVIRONMENTAL TESTS,...
257
257
Jun 21, 2010
06/10
by
Rupe, J. H
texts
eye 257
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Experimental correlation of nonreactive properties of injection schemes and combustion effects in liquid propellant rocket engine - influence of vanes on combustion stability
Topics: ENVIRONMENTAL TESTS, MICROMINIATURIZED ELECTRONIC DEVICES, SURFACE DEFECTS, TEMPERATURE EFFECTS,...
281
281
Jun 21, 2010
06/10
by
Wingrove, R. C
texts
eye 281
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Pilot describing function estimates from closed loop tracking operation data
Topics: ACTUATORS, ELECTRICAL PROPERTIES, MECHANICAL PROPERTIES, SERT 2 SPACECRAFT, ENVIRONMENTAL TESTS,...
By substituting several components to bio-based, more biodegradable, and less toxic ingredients, anti-icing fluids (AAFs) that are more environmentally friendly were achieved. Development of these fluids focused on the replacement of alkylphenol ethoxylate (APE) surfactants that are toxic, replacement of triazole corrosion inhibitors which are toxic and non-biodegradable, and replacement of non-biodegradable anti-precipitant. All three newly developed AAFs are free of APE surfactants and...
Topics: DTIC Archive, BATTELLE MEMORIAL INST COLUMBUS OH, *DEICING SYSTEMS, AIRCRAFT, BIODETERIORATION,...
233
233
Jun 27, 2010
06/10
by
Mayhue, R. J
texts
eye 233
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comment 0
No Abstract Available
Topics: SURVEYOR PROJECT, SYSTEMS ANALYSIS, SYSTEMS ENGINEERING, ENVIRONMENTAL TESTS, MISSION PLANNING,...
407
407
May 31, 2011
05/11
by
Craig, Larry; Smithers, Martin; Nein, Max; Hadaway, Jame
texts
eye 407
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This paper discusses NASTRAN structural analysis of the Sub-Scale Beryllium Mirror Demonstrator (SBMD), which has been developed by Ball Aerospace as an experimental design concept for the Next Generation Space Telescope (NGST). The mirror was repeatedly subjected to 35 K environment in the large cryogenic test chamber at Marshall Space Flight Center. Deformations on the mirror surface were measured optically. The surface distortions predicted by NASTRAN are analyzed optically for comparison...
Topics: AGING (MATERIALS), MANUFACTURING, FLUORESCENCE, ENVIRONMENTAL TESTS, CHEMICAL ANALYSIS, REPLACING,...
Topics: DTIC Archive, MINISTRY OF AVIATION LONDON (UNITED KINGDOM), *AIRCRAFT TORPEDOES, INSTRUMENTATION,...
The grenade was subjected to environmental field testing from 47 to 49 months. The grenade will function satisfactorily during this length of testing at the Arctic, Desert, Temperate and Tropic Test Sites.
Topics: DTIC Archive, ARMY DUGWAY PROVING GROUND UT, *GRENADES, CORROSION, ENVIRONMENTAL TESTS, SHELF LIFE,...
A study was made to evaluate the performance of wax/resin impregnated fiberboards and containers for applicability for use in shipment overseas under all environmental conditions, and as a substitute for conventional weather resistant materials which may become critical and are in short supply during periods of emergency. Sixteen different tests were performed conforming to ASTM Standards or to the requirements of Federal Specifications, utilizing up to 5 different environmental conditions:...
Topics: DTIC Archive, ARMY NATICK LABS MA CONTAINER DIV, *CONTAINERS, MILITARY SUPPLIES, ENVIRONMENTAL...
299
299
Jul 12, 2010
07/10
by
NON
texts
eye 299
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comment 0
No Abstract Available
Topics: ELECTRIC EQUIPMENT, ENVIRONMENTAL TESTS, LITTLE JOE 2 LAUNCH VEHICLE, EQUIPMENT SPECIFICATIONS,...
1,031
1.0K
Jun 21, 2010
06/10
by
NON
texts
eye 1,031
favorite 0
comment 0
No Abstract Available
Topics: SATURN S-4B STAGE, SKIRTS, STRUCTURAL ANALYSIS, ENVIRONMENTAL TESTS, MECHANICAL PROPERTIES, SATURN...
258
258
Jun 27, 2010
06/10
by
Florenskiy, P. V., et al
texts
eye 258
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Polar asymmetry in earth formations and on other planets
Topics: DYNAMIC RESPONSE, HIGH RESOLUTION, MASS SPECTROMETERS, PRODUCT DEVELOPMENT, QUADRUPOLES,...
The design of the space shuttle RCS engine has the primary objective of reusability with minimum servicing. Engine S/N FT-2A has successfully completed all ten environmental (salt water spray, sand and dust, vibration and humidity) and hot fire cycles with no change in engine performance (steady state or pulse mode).
Topics: NASA Technical Reports Server (NTRS), ENGINE DESIGN, SPACE SHUTTLES, ENGINE TESTS, ENVIRONMENTAL...
526
526
Jul 11, 2010
07/10
by
Moreno, R
texts
eye 526
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No Abstract Available
Topics: ENVIRONMENTAL TESTS, POSTFLIGHT ANALYSIS, PRELAUNCH TESTS, TIROS 4 SATELLITE, THOR DELTA LAUNCH...
This environment has not only attracted people and increased payrolls, but has also created a broader base for the local economy. The activity of the center was a catalyst to private enterprise and has led to sizeable residential and commercial developments. Adequate treatment of domestic and industrial waste water was maintained. A feasibility study is now being conducted to establish a plan for a coordinated, centerwide plan for advanced treatment of domestic and industrial waste water.
Topics: NASA Technical Reports Server (NTRS), AIR POLLUTION, TEST FACILITIES, TEXAS, WATER POLLUTION,...
321
321
Jul 11, 2010
07/10
by
Alexander, A. D., II
texts
eye 321
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The United States transportation fuel economics in terms of fuel resources options, processing alternatives, and attendant economics for the period 1975 to 1995 are evaluated. The U.S. energy resource base is reviewed, portable fuel-processing alternatives are assessed, and selected future aircraft fuel options - JP fuel, liquid methane, and liquid hydrogen - are evaluated economically. Primary emphasis is placed on evaluating future aircraft fuel options and economics to provide guidance for...
Topics: ACTIVITY CYCLES (BIOLOGY), ENVIRONMENTAL TESTS, LOCOMOTION, SWINE, BIOLOGICAL EFFECTS, CORRELATION...
258
258
Jun 26, 2010
06/10
by
Berry, E. H.; Nola, F. J
texts
eye 258
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comment 0
Conversion of positive dc voltage to positive dc voltage of lower amplitude
Topics: ENVIRONMENTAL TESTS, MATERIALS TESTS, SYSTEMS ENGINEERING, TEST CHAMBERS, X RAY IRRADIATION,...
282
282
Jun 27, 2010
06/10
by
Green, R. N.; Hoffman, L. H.; Young, G. R
texts
eye 282
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Computer program for transfer orbit trajectory optimization based on Lagrange multipliers, Newton-Raphson method, and power series
Topics: ENVIRONMENTAL TESTS, SEALERS, SILVER ZINC BATTERIES, STERILIZATION, VIKING LANDER SPACECRAFT,...
This Asbestos Sampling Plan has been developed to guide an asbestos survey at Fort Douglas, Utah, (Figure 1-1) in support of an Environmental Investigation/Alternatives Analysis (EI/AA). The EI/AA is being conducted in support of the closure of approximately 51 acres of Fort Douglas, which was directed by the Base Closure and Realignment Act. The U.S. Army Toxic and Hazardous Materials Agency (USATHAMA) has been assigned the responsibility for centrally managing the Fort Douglas EI/AA program....
Topics: DTIC Archive, STOLLAR (R L) AND ASSOCIATES INC DENVER CO, *ENVIRONMENTAL TESTS, *ASBESTOS, TEST AND...
637
637
Jun 26, 2010
06/10
by
Etheridge, O. E
texts
eye 637
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Space shuttle trajectory performance data for east and west test range launch simulations
Topics: DRIFT (INSTRUMENTATION), VACUUM, ENVIRONMENTAL TESTS, THERMOCOUPLES, AIR, ARGON, ELECTRICAL...
261
261
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THE RESULTS OF QUALIFICATION TESTS CARRIED OUT WITH EOLE BALLOON SOLAR GENERATOR COMPONENTS ARE DESCRIBED. THESE INCLUDE MECHANICAL, ELECTRICAL, ENVIRONMENTAL, AND LAUNCH SIMULATION TESTS. THE COMPONENTS WERE FOUND TO BE ACCEPTABLE.
Topics: ENVIRONMENTAL TESTS, PERFORMANCE TESTS, SOLAR CELLS, THIN FILMS, CYCLIC LOADS, ELECTRICAL...
249
249
Jul 21, 2010
07/10
by
NON
texts
eye 249
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comment 0
No Abstract Available
Topics: AIRCRAFT STRUCTURES, ENVIRONMENTAL TESTS, GRAPHITE-EPOXY COMPOSITES, HELICOPTERS, KEVLAR...
Various devices and techniques are described for testing hardware and components in four special environments: low temperature, high temperature, high pressure, and vibration. Items ranging from an automatic calibrator for pressure transducers to a fixture for testing the susceptibility of materials to ignition by electric spark are included.
Topics: NASA Technical Reports Server (NTRS), ENVIRONMENTAL TESTS, HIGH TEMPERATURE, LOW TEMPERATURE, HIGH...
The ALSEP program status and monthly progress are reported. Environmental and quality control tests and test results are described. Details are given on the Apollo 17 Array E, and the lunar seismic profiling, ejecta and meteorites, mass spectrometer, surface gravimeter, and heat flow experiments. Monitoring of the four ALSEP systems on the moon is also described.
Topics: NASA Technical Reports Server (NTRS), APOLLO LUNAR SURFACE EXPERIMENTS PACKAGE, ENVIRONMENTAL...
The document provides background information relative to maintenance during desert environmental tests. It discusses general and unique maintenance requirements, problems, and evaluation guidance. It is applicable to all materiel.
Topics: DTIC Archive, ARMY TEST AND EVALUATION COMMAND ABERDEEN PROVING GROUND MD, *ARMY EQUIPMENT,...
Topics: DTIC Archive, TEXAS CHRISTIAN UNIV FORT WORTH, *BEHAVIOR, DECISION MAKING, PSYCHOLOGY,...
Phase one and two of a program to further develop and investigate advanced graphite epoxy waveguides, radiators, and components with application to space antennas are discussed. The objective of the two phases were to demonstrate mechanical integrity of a small panel of radiators and parts procured under a previous contract and to develop alternate designs and applications of the technology. Most of the emphasis was on the assembly and test of a 5 x 5 element module. This effort was supported...
Topics: NASA Technical Reports Server (NTRS), ANTENNA ARRAYS, ANTENNA COMPONENTS, GRAPHITE-EPOXY...
A key element of U.S. military strategy is the ability to rapidly deploy, employ, sustain, and redeploy capabilities in geographically separate and environmentally diverse regions around the world. To support that strategy, U.S. military systems must be able to operate effectively and safely in the full range of natural environments found around the globe. The ability to operate in a tropic environment is especially critical as approximately three-fourths of all regional conflicts have taken...
Topics: DTIC Archive, YUMA PROVING GROUND AZ, *ENVIRONMENTAL TESTS, *TROPICAL REGIONS, HISTORY, TROPICAL...
Exchange of DMS and OCS between the surface of Sphagnum peatlands and the atmosphere were measured with dynamic (S-free sweep air) and static enclosures. DMS emission rates determined by both methods were comparable. The dynamic method provided positive OCS flux rates (emission) for measurements performed at sites containing Sphagnum. Conversely, data from the static method indicated that OCS was consumed from the atmosphere. Short and long-term impacts of increased S deposition on fluxes of...
Topics: NASA Technical Reports Server (NTRS), ENVIRONMENT EFFECTS, ENVIRONMENTAL TESTS, SULFUR COMPOUNDS,...
Grease type lubricants in bearings were evaluated in five different adverse environments for a one year period. Four repetitions of each test were made to provide statistical samples. These tests were then used to select four lubricants for five year tests in selected environments with five repetitions of each test for statistical samples. Three five year tests were started in (1) continuous operation; (2) start-stop operation, with both in vacuum at ambient temperatures; and (3) continuous...
Topics: NASA Technical Reports Server (NTRS), ENVIRONMENTAL TESTS, GREASES, LUBRICANTS, BALL BEARINGS,...
Wind Test Report for the Navigational Set, TACAN, AN/TRN-41
Topics: DTIC Archive, E-SYSTEMS INC SALT LAKE CITY UT MONTEK DIV, *NAVIGATIONAL AIDS, *TACAN, ENVIRONMENTAL...
This study was conducted to identify dominant loss and movement processes for nitroguanidine (NG), diethyleneglycol dinitrate (DEGDN), and hexachloroethane smoke products in air, soil, and water environments. The loss of NG in the aqueous environment will be dominated by photolysis, with half-lives ranging from 1.6 days in the summer to 3.9 days in the winter. Biotransformation occurred under both aerobic and anaerobic conditions, with half-lives of 4 and 6 days, respectively, in the presence...
Topics: DTIC Archive, Spanggord, Ronald J, SRI INTERNATIONAL MENLO PARK CA, *NITROGUANIDINE, NITRATES,...
