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  • General Chemistry  (1,165)
  • INSTRUMENTATION AND PHOTOGRAPHY  (496)
  • THERMODYNAMICS AND COMBUSTION  (344)
  • Cell & Developmental Biology
  • 1985-1989
  • 1980-1984
  • 1970-1974  (2,194)
  • 1971  (2,194)
Collection
Keywords
Publisher
Years
  • 1985-1989
  • 1980-1984
  • 1970-1974  (2,194)
Year
  • 101
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    Spectral measurements of nitrogen continuum radiation behind incident shocks at speeds up to 13 km/sec (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Spectral measurements of nitrogen continuum radiation behind incident shocks at high speeds, suggesting free bound neutral atom-electron interactions origin
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; HYSICAL PROCESSES IN
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  • 102
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    Flightworthy, high performance insulation development. II (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Multilayer insulation systems development and selection for cryogenics thermal protection on space vehicles, considering mechanical properties, radiation shielding, components, evacuation rate and outgassing
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; DIOTEKHNIKA (
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  • 103
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    MSDS - An experimental 24-channel multispectral scanner system (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Multispectral scanner and data system with 24 channels for NASA C-130 earth resources survey aircraft
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ; 121- 147. (
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  • 104
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    Nonisotropic exchange coefficients in turbulent swirling flames from mean value distributions (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Turbulent swirling flames nonisotropic exchange coefficients determination from time mean velocity, pressure, temperature and concentration distributions
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; - DISCRETE CONTROL S
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  • 105
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    Shape evolution of a subliming surface subjected to unsteady spatially nonuniform heat flux (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Two dimensional unsteady heat conduction in solid with subliming surface, replacing original boundary value problem by ordinary integrodifferential equation
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; - CALCULATION OF THR
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  • 106
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    Use of a multichannel scaler and computing calculator to generate optical transfer functions (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Multichannel scaler as interface between edge scan unit and calculator to generate optical transfer functions
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ; HEORETICAL PROBLEMS
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  • 107
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    Ocean-height measurement by satellite altimetry (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Ocean height measurement by orbit determination from satellite altimetry, considering least squares solutions and instrument errors
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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  • 108
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    AC power meter (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: AC power meters using electronic multiplier for overcoming limitations concerning frequency ranges, response times, power factor and distortion
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ; ADEMIE DES SCIENCES
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  • 109
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    Computerized micromechanical testing (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Materials microstrain determination using automatic capacitance bridge gage and analog or hybrid computer for measurement signal processing
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ; ADEMIE DES SCIENCES
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  • 110
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    The effect of high-frequency periodic disturbances on axisymmetric wake diffusion flames (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Axisymmetric wake diffusion flame response to HF periodic velocity oscillations at combustor boundaries
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; BROTECHNIKA, NO. 1(
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  • 111
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    Calibration of the Mariner Mars 1969 television cameras (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Mariner Mars 1969 TV cameras instrument design and calibration techniques
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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  • 112
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    A comparison of analysis and experiment for solid propellant combustion instability (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Combustion instability data with same solid propellants by T-burner and L super asterisk burner, discussing theoretical models of transient combustion
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; BROTECHNIKA, NO. 2(
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  • 113
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    Improved RF calibration techniques: System operating noise temperature calibrations (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: System operating noise temperature calibrations of S band research operational cone at Venus Deep Space Station and polarization diversity S band cone at Mars Deep Space Station
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: The Deep Space Network, Vol. 4; p 105-109
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  • 114
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    Lee side heating investigations. Part 1 - Experimental lee side heating studies on a delta wing orbiter (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Lee surface flow and aerodynamic heating on delta wing orbiter
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 1 APR. 1971; P 267-287
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  • 115
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    Design and operation of the NASA 91.5-cm airborne telescope (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: StarLifter borne large aperture astronomical telescope for IR and submillimeter observations, discussing design and operation
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ; IENCES (
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  • 116
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    Summary of the NASA-SRI Round Robin Ablation Program (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: NASA-SRI Round Robin Ablation Program summary, discussing dimensional analysis, Teflon, nylon and surface temperature
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; 121- 147. (
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  • 117
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    Influence of water vapor upon the properties of shocked air in thermodynamic equilibrium (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Water vapor effects on shock compressed air in thermodynamic equilibrium by computer program, noting temperature and electron concentration reduction
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; IBRATIONAL COMBUSTIO
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  • 118
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    The effect of boundaries on the velocity deficit and the limit of gaseous detonations (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Boundary effects on gaseous detonation velocity deficit and limit using approximation into boundary layer equations, comparing to experimental data
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; UG REVUE(
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  • 119
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    An in situ, metal-gas, secondary-standard assembly for ultrahigh-vacuum instrumentation (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: In situ metal-gas secondary standard assembly for ultrahigh vacuum gage calibration, using repeatable pressure generation from binary erbium- hydrogen system
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ; - EXACT METHODS OF S
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  • 120
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    Use of photomultiplier tubes for photon counting (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Critique on photomultiplier tube for photon counting, considering pulse height distribution, SNR and electron collection efficiency errors
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ; YSICA STATUS SOLIDI
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  • 121
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    Influence of differences in thermochemistry data upon high-temperature gas composition (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Thermochemistry data changes influence in form of heat of formation, partition functions, specie free energy or specific heat on high temperature gas mixtures composition
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; - DISCRETE CONTROL S
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  • 122
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    Thermal emissivity and solar absorptivity of aluminum coated with double layers of aluminum oxide and silicon oxide (1971)
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    Publication Date: 2011-08-16
    Description: Thermal emissivity and solar absorptivity of Al coated with surface layers of aluminum oxide and silicon oxide, describing fabrication techniques and performance measurements
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; TROPHYSICAL JOURNAL
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  • 123
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    A method of treating the nongray error in total emittance measurements (1971)
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    Publication Date: 2011-08-16
    Description: Total emittance measurements by portable IR reflectometer, tabulating nongray error effects
    Keywords: THERMODYNAMICS AND COMBUSTION
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  • 124
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    Noise characteristics of photographic emulsions used for holography (1971)
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    Publication Date: 2011-08-16
    Description: Photographic emulsion model for signal to average noise irradiance ratio analysis in hologram reconstruction
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ; BROTECHNIKA, NO. 1(
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  • 125
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    Sensitive fast response electron detector (1971)
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    Publication Date: 2011-08-16
    Description: Sensitive fast response scintillation electron detector for use with signal energy analyzer
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ; VUE SCIENTIFIQUE ET
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  • 126
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    Ablation and luminosity of artificial meteors (1971)
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    Publication Date: 2011-08-16
    Description: Artificial meteors ablation and luminosity measurements, using ballistic range shadowgraph and radiometric equipment for velocity history, shock wave formation and mass loss process
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; YAL SOCIETY (
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  • 127
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    Maximum discriminability versions of the near- encounter Mariner pictures (1971)
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    Publication Date: 2011-08-16
    Description: Mariner near encounter pictures with maximum discriminability, applying algorithms for contrast and resolution enhancement and noise removal
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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  • 128
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    Digital period detector oscilloscope trigger (1971)
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    Publication Date: 2011-08-16
    Description: Digital period detector oscilloscope trigger for multitrace display
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: The Deep Space Network, Vol. 4; p 79-83
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  • 129
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    Development status of reusable nonmetallic thermal protection (1971)
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    Publication Date: 2011-08-16
    Description: Development of reusable oxidation resistant carbon-carbon laminates and surface insulation materials for thermal protection systems
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 2 APR. 1971; P 1-38
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  • 130
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    A digital pressure transducer (1971)
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    Publication Date: 2011-08-16
    Description: Specifications and performance tests for digital pressure transducers designed for spacecraft application
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: INSTRUMENTATION AND COMMUN. RES. AT MSFC, VOL. 4 MAY 1971; P 11-18
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  • 131
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    Plume impingement during separation of a two stage space shuttle vehicle (1971)
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    Publication Date: 2011-08-16
    Description: Optimum separation trajectory analysis for two stage space shuttle configuration considering plume impingement effect
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 1 APR. 1971; P 393-421
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  • 132
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    Shock interference heating on the space shuttle booster during ascent (1971)
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    Publication Date: 2011-08-16
    Description: Aerothermodynamic shock heating of space shuttle booster surface during atmospheric ascent
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA, WASHINGTON NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 1 APR. 1971; P 245-266
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  • 133
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    Shock interference heating and density-ratio effects. Part 1 - Flow field visualization, thermocouple measurements, and analysis (1971)
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    Publication Date: 2011-08-16
    Description: Flow visualization, thermocouple measurements, and analyses of shock interference heating effects on straight wing space shuttle model
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 1 APR. 1971; P 185-215
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  • 134
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    An analysis of predicted space shuttle temperatures and their impact on thermal protection systems (1971)
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    Publication Date: 2011-08-16
    Description: Comparison of space shuttle aerodynamic heating analyses for metallic heat shield and surface insulation concepts
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA, WASHINGTON NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 1 APR. 1971; P 75-96
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  • 135
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    Shock interference heating and density ratio effects. Part 2 - Hypersonic density ratio effects (1971)
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    Publication Date: 2011-08-16
    Description: Hypersonic shock/density ratio effects in aerothermodynamic heating of space shuttle configuration
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 1 APR. 1971; P 217-243
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  • 136
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    Analysis of the longitudinal high frequency stability of a staged combustion cycle, Appendix B (1971)
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    Publication Date: 2011-08-16
    Description: Time lag theory for longitudinal high frequency stability analysis on staged combustion cycle of liquid propellant rocket engine
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: STABILITY CHARACTERIZATION OF ADVANCED INJECTORS, DESIGN GUIDE, VOL. 2 FEB. 1971 (SEE N71-20415 09-28)
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  • 137
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    Photogrammetric and photometric investigation of a smoke plume viewed from space. (1971)
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    Publication Date: 2011-08-16
    Description: Use of detailed analyses of an Apollo 6 stereographic photograph of a smoke plume which originated in southern Arizona and crossed over into Mexico to illustrate how high-resolution photography can aid meteorologists in evaluating specific air pollution events. Photogrammetric analysis of the visible smoke plume revealed that the plume was 8.06 miles long and attained a maximum width of 4000 ft, 3.0 miles from the 570-ft chimney emitting the effluent. Stereometric analysis showed that the visible top of the plume rose nearly 2400 ft above stack top, attaining 90% of this total rise 1.75 miles downwind from the source. Photometric analysis of the plume revealed a field of plume optical density that portrayed leptokurtic and bimodal distributions rather than a true Gaussian distribution. A horizontal eddy diffusivity of about 650,000 sq cm/sec and a vertical eddy diffusivity of 230,000 sq cm/sec were determined from the plume dimensions. Neutron activation analysis of plume samples revealed the elemental composition of the smoke to be copper, arsenic, selenium, indium and antimony, with trace amounts of vanadium and scandium.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Journal of Applied Meteorology; 10; Dec. 197
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  • 138
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    Thermodynamic properties and nozzle flow of hydrogen to 1000 atm and 100,000 K (1971)
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    Publication Date: 2011-08-16
    Description: Thermodynamic properties and nozzle flow calculations for high temperature and pressure hydrogen, presenting results in Mollier diagram
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; ADEMIE DES SCIENCES
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  • 139
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    In-situ measurement of objective lens data of a high-resolution electron microscope. (1971)
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    Publication Date: 2011-08-16
    Description: Bragg-reflex images of small individual crystallites in the size range of 20-100 A diameter with known crystallographic orientation were used in a transmission electron microscope to determine in-situ: (a) the relationship between objective lens current (or accelerating voltage) changes in discrete steps and corresponding defocus, (b) the spherical aberration coefficient, and (c) the axial chromatic aberration coefficient of the objective lens. The accuracy of the described method is better than 5%. The same specimen can advantageously be used to properly aline the illuminating beam with respect to the optical axis.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Optik; 34; 1971
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  • 140
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    Comparison of SLAR images and small-scale, low-sun aerial photographs. (1971)
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    Publication Date: 2011-08-16
    Description: A comparison of side-looking airborne radar (SLAR) images and black and white aerial photos of similar scale and illumination of an area in the Mojave Desert of California shows that aerial photos yield far more information about geology than do SLAR images because of greater resolution, tonal range, and geometric fidelity, and easier use in stereo. Nevertheless, radar can differentiate some materials or surfaces that aerial photos cannot; thus, they should be considered as complementary, rather than competing tools in geologic investigations. The most significant advantage of SLAR, however, is its freedom from the stringent conditions of weather, date, and time that are required by small-scale aerial photos taken with a specified direction and angle of illumination. Indeed, in low latitudes, SLAR is the only way to obtain small-scale images with low illumination from certain directions; moreover, in areas of nearly continuous cloudiness, radar may be the only practical source of small-scale images.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Geological Society of America Bulletin; 82; June 197
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  • 141
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    Kinetic limitations on the diffusional control theory of the ablation rate of carbon. (1971)
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    Publication Date: 2011-08-16
    Description: It is shown that the theoretical maximum oxidation rate is limited in many cases even at temperatures much higher than 1650 deg K, not by oxygen transport, but by the kinetics of the carbon-oxygen reaction itself. Mass-loss rates have been calculated at air pressures of 0.01 atm, 1 atm, and 100 atm. It is found that at high temperatures the rate of the oxidation reaction is much slower than has generally been assumed on the basis of a simple linear extrapolation of Scala's 'fast' and 'slow' rate expressions. Accordingly it cannot be assumed that a transport limitation inevitably must be reached at high temperatures.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: Journal of Spacecraft and Rockets; 8; Dec. 197
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  • 142
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    Thin wing corrections for phase-change heat-transfer data. (1971)
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    Publication Date: 2011-08-16
    Description: Since no methods are available for determining the magnitude of the errors incurred when the semiinfinite slab assumption is violated, a computer program was developed to calculate the heat-transfer coefficients to both sides of a finite, one-dimensional slab subject to the boundary conditions ascribed to the phase-change coating technique. The results have been correlated in the form of correction factors to the semiinfinite slab solutions in terms of parameters normally used with the technique.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: Journal of Spacecraft and Rockets; 8; Dec. 197
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  • 143
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    Criteria for electrically heated temperature probes in flames. (1971)
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    Publication Date: 2011-08-16
    Description: Measurement techniques proposed by Gilbert and Lobdell (1953) and Rein and O'Laughlin (1967) are considered, giving attention to an apparent paradox. The criteria under which the assumptions made for the measurement techniques apply are specified. If sensors of different diameters are tested and the resultant plots of the parameter ?S' vs the wire temperature intersect below the abscissa, the considered measurement techniques are not applicable.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: AIAA Journal; 10; Jan. 197
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  • 144
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    New half-range differential approximation for spherically-symmetric radiative transfer. (1971)
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    Publication Date: 2011-08-16
    Description: A new half-range differential approximation for radiative transfer with spherical symmetry is presented. The development is motivated by the various failures of existing differential approximations in determining emissive-power distributions and heat transfer for concentric-spheres problems. The new approach represents a modification of the four-moment double spherical-harmonics method, to which it reduces in the planar limit. The difference is effected by relocating the discontinuity of the assumed directional distribution of radiation intensity. The shift takes the discontinuity from precisely on the division between radially inward and radially outward, to just within the radially-outward directional half range. The method is tested on a variety of concentric spheres problems with and without internal heat sources, reproducing all the important features of the exact results.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: AIAA Journal; 9; Dec. 197
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  • 145
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    The Jimsonde - A high resolution temperature sensor. (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The Jimsonde, a high-resolution lightweight temperature sensor developed for use with the FPS-16 Radar/Jimsphere wind system, and its related systems are discussed; and an error analysis that shows the sonde to have an rms error of 0.41 C at sea level and 0.56 C at 18 km is presented. Five flight tests, a sequence of four tests and one individual test, of the Jimsonde were made. For comparative purposes, radiosonde temperature data are presented along with the Jimsonde data.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Journal of Geophysical Research; 76; Dec. 20
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    Molybdenum work function determined by electron emission microscopy. (1971)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: A polycrystalline molybdenum sample was recrystallized and thermally stabilized. Quantitative measurements of the emission from each individual grain were obtained with an electron emission microscope. The effective work function for each grain was then calculated. The crystallographic orientation of each grain was determined by Laue back-reflection techniques. A polar plot of effective work function vs crystallographic orientation for the sample was constructed to provide a correlation between effective work function and crystallographic orientation.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Metallurgical Transactions; 2; Nov. 197
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  • 147
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    Analysis of heat transfer for compressible flow in two-dimensional porous media (1971)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Compressible gas flow in two dimensional porous wall, calculating heat transfer and mass flow by conformal mapping for Laplace equation solution
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: ; - PHYSICAL AND RADIO
    Format: text
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  • 148
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    Testing Multiband and Multidate Photography for Crop Identification (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Procedures used and results derived in a series of prerequisite interpretation tests that were performed on multiband and multidate photography are described. The results of these quantitative tests led to the selection of what was considered to be the best combination of multiband and multidate photographs for use in the Maricopa County Survey.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA, Washington Intern. Workshop on Earth Resources Surv. Systems, Vol. 2; p 32-46
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  • 149
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    Photographic Remote Sensing of Sick Citrus Trees (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Remote sensing with infrared color aerial photography (Kodak Ektachrome Infrared Aero 8443 film) for detecting citrus tree anomalies is described. Illustrations and discussions are given for detecting nutrient toxicity symptoms, for detecting foot rot and sooty mold fungal diseases, and for distinguishing among citrus species. Also, the influence of internal leaf structure on light reflectance, transmittance, and absorptance are considered; and physiological and environmental factors that affect citrus leaf light reflectance are reviewed briefly and illustrated.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA, Washington Intern. Workshop of Earth Resources Surv. Systems, Vol. 2; p 14-30
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  • 150
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    Agricultural Applications and Requirements for Thermal Infrared Scanners (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Some of the applications of thermal scanner data in agriculture are presented along with illustrations of some of the factors affecting the temperature of plants, soil, and water. Examples of thermal imagery are included.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA, Washington Intern. Workshop on Earth Resources Surv. Systems, Vol. 2; p 66-81
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  • 151
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    The Use of Small Scale Aerial Photography in a Regional Agricultural Survey (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The feasibility of performing inventories of agricultural resources using very small scale aerial or space photography has been investigated. Results to date are encouraging on two counts: (1) the questions posed initially are being answered, and (2) it would seem that a fully operational agricultural inventory using very small scale photography is not beyond the scope of present technology. The biggest problems to be faced in establishing a functional inventory system are those concerning logistics and data handling.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA, Washington Intern. Workshop on Earth Resources Surv. Systems, Vol. 2; p 2-12
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  • 152
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    Flammability testing conducted in support of Apollo 13 (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: In support of the Apollo 13 investigation of the oxygen tank failure, flame propagation rates were determined for Teflon insulation in cryogenic and ambient temperature oxygen for upward, downward, and zero g burns. The propagation rates depended heavily on configuration and varied from 4.8 to 10.9 cm/sec for upward one g burns to 0.48 cm/sec for zero g burns. In addition to the flame propagation rates, tests were conducted to determine if Teflon burning in cryogenic oxygen could ignite metals (promoted ignition) with which it came in contact. Tests conducted on various metal alloys used in the oxygen tank indicated that most of the alloys could be ignited by burning Teflon in certain configurations. After the propagation rates and promoted metal ignitions had been evaluated, a test was conducted on a quantity gauge and wire harness used in the oxygen tank to determine if flame propagation to the tank wall was possible. Propagation of the wire bundle after ignition resulted in a catastrophic failure of the test vessel in the area of the quantity gauge.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: MSC Cryog. Symp. Papers; p 455-474
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  • 153
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    Zero-gravity transient thermal mixing simulation (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The experimental program described is an outgrowth of independent investigations into alternate redesign concepts for the Apollo SM cryogenic oxygen storage system. The experiments were continued, after the redesign was established, to provide physical insight into transient thermal mixing in zero-gravity and to aid in the characterization of the system performance in flight. Zero-gravity heat transfer and fluid mixing were simulated experimentally through an analogy between unsteady heat conduction and species diffusion. To further support numerical analyses of the cryogenic oxygen storage system, the experimental investigation was extended to include a cubical tank geometry, representative of existing numerical models. In general, the transient flow patterns in the cubical tank are far more complex than those of the spherical tank and the extent of fluid mixing is significantly greater but less repeatable.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: MSC Cryog. Symp. Papers; p 407-432
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  • 154
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    Correlation of Apollo oxygen tank thermodynamic performance predictions (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Parameters necessary to analyze the stratified performance of the Apollo oxygen tanks include g levels, tank elasticity, flow rates and pressurized volumes. Methods for estimating g levels and flow rates from flight plans prior to flight, and from quidance and system data for use in the post flight analysis are described. Equilibrium thermodynamic equations are developed for the effects of tank elasticity and pressurized volumes on the tank pressure response and their relative magnitudes are discussed. Correlations of tank pressures and heater temperatures from flight data with the results of a stratification model are shown. Heater temperatures were also estimated with empirical heat transfer agreement with flight data when fluid properties were averaged rather than evaluated at the mean film temperature.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA. Manned Spacecraft Center MSCCryog. Symp. Papers; p 103-129
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  • 155
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    Utilization of available skills and materials in fire prevention (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Procedures for installing fire protection systems in large buildings are discussed. Factors considered in the safety management are: (1) distribution of water supply, (2) design and location of exits, (3) emergency power system, and (4) maintenance procedures.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: Univ. of S. Calif. Fireproofing and Safety Symp. Proc.; p 33-40
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  • 156
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    How to reduce your fire insurance rates (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Construction procedures and utilization of materials to reduce the cost of insuring large buildings against losses from fire are discussed. Examples of good and bad techniques in building construction and fire safety management are provided. The inadequacies of building codes and the hazards resulting from improper construction are examined.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: Univ. of S. Calif. Fireproofing and Safety Symp. Proc.; p 41-53
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  • 157
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    Introduction to program subject: Fireproofing (1971)
    In:  CASI
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    Publication Date: 2016-06-07
    Description: Various processes for fireproofing materials are discussed. The conditions under which fireproofing measures may be adequate are compared with conditions under which the measures may be inadequate. The mechanisms for flame propagation and conditions required for ignition and burning are described.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: Fireproofing and Safety Symp. Proc.; p 19-32
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  • 158
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    The characterization of facsimile camera systems for lunar and planetary surface exploration (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Advantages of facsimile camera systems are reviewed for imagery of lunar and planetary surfaces from stationary or stopped remotely controlled vehicles. They include: better geometric fidelity than television systems, more picture elements per frame, ability to take single frame panoramic pictures, a very high contrast ratio within a picture, a choice of one or more narrow-band spectral responses over a wide possible range, image transmission over a low bit-rate communications channel without storage, very low power, small size, low weight, and ruggedizability to meet space flight requirements. Systems of this kind are under development for the 1975 Viking Martian lander, and have been used by the Soviets on Lunas and Lunokhod laboratory and field evaluation of a completed facsimile camera system is presented. The applicability of facsimile cameras to lunar and planetary rovers is demonstrated.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: JPL Quart. Tech. Rev., Vol. 1, No. 3; p 1-16
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  • 159
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    The Flash Evaporator for Transient Heat Loads (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Liquid spray flash evaporator for space shuttle thermal control
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA. Kennedy Space Center Space Shuttle Technol. Conf., Vol. 2; p 35-65
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  • 160
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    Production of Motion Pictures of a Continuously Deforming Structure Using NASTRAN (1971)
    In:  CASI
    Details
    Publication Date: 2014-09-03
    Description: NASTRAN generation of motion pictures for analysis of elastic structure transient responses under continuous deformation conditions
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Langley Res. Center NASTRAN: Users Experiences; p 647-657
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  • 161
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    Shuttle sensors (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Requirements, quantities, location, and temperature environment limitations of sensors for space shuttles
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Proc. of the Space Shuttle Integrated Electron. Conf., Vol. 2; p 73-104
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  • 162
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    The effects of gravity on flammability (1971)
    In:  CASI
    Details
    Publication Date: 2017-01-27
    Description: The effects of weightlessness and increased gravity on flammability and flame propagation are discussed. The test equipment and procedures for determining gravity effects are described. Comparisons are made between flammability under normal gravity conditions and occurrences under altered gravity conditions
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: Conf. on Mater. for Improved Fire Safety; 137-139
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  • 163
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    A nuclear magnetic resonance spectrometer for the measurement of the moisture content of soils and rocks (1971)
    In:  Other Sources
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    Publication Date: 2019-01-25
    Description: Nuclear magnetic resonance spectrometer for moisture content measurement of lunar and terrestrial soils and rocks
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: GEOLOGICAL PROBLEMS IN LUNAR AND PLANETARY RESEARCH.; P. 123-136.
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  • 164
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    System safety plan for the ultraviolet spectrometer experiment S169 (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Comprehensive safety program requirements are defined and a methodology for implementing the defined safety tasks in support of the design, development, manufacturing, testing and flight phases of the ultraviolet spectrometer experiment is presented.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-128570 , T72-19228 , SOR-71-002
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  • 165
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    Final stress analysis report ultraviolet spectrometer S169 (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The stress analysis report verifies the structural integrity of the Apollo S-169 UV-spectrometer experiment. The methods by which the various members were analyzed are described. A detailed summary of results for the individual structural elements appears in the form of a table of minimum margins of safety. No negative margins of safety were experienced. It is concluded that the component structure is more than adequate to withstand the environmental load conditions given in the design criteria.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-128551 , T72-19413 , S4M-2-250
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  • 166
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    Shock-tube thermochemistry tables for high-temperature gases. Volume 5: Carbon dioxide (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Equilibrium thermodynamic properties and species concentrations for carbon dioxide are tabulated for moving, standing, and reflected shock waves. Initial pressures range from 6.665 to 6665 N/sq m (0.05 to 50.0 torr), and temperatures from 2,000 to over 80,000K. In this study, 20 molecular and atomic species were considered.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA-CR-135944 , JPL-TR-32-1408-VOL-5
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  • 167
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    Measurement of energies using a glass-scintillator ionization spectrometer. (1971)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: A method is proposed for obtaining the energies of high-energy hadrons incident upon a glass-scintillator ionization spectrometer. The description of the apparatus and of its calibration with cosmic ray muons is followed by a demonstration of the processing of the data obtained.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Nuclear Instruments and Methods; 97; 1971
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  • 168
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    An interlaboratory comparison of piston-cylinder pressure calibration using the albite-breakdown reaction. (1971)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: An attempt is made to compare pressure calibration methods among several laboratories in an unbiased way to produce some indication of the bandwidth of observations on the pressure of an equilibrium reaction where sources of discrepancy not resulting from pressure calibration are likely to have been eliminated. The reaction chosen is the breakdown of albite to jadeite and quartz under pressure.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Contributions to Mineralogy and Petrology; 32; 1971
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  • 169
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    An assessment of remote sensor imagery in the determination of housing quality data (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Selected census tracts in the metropolitan Washington area were examined using varying scales of aerial photography. Observable characteristics of housing and neighborhoods were assessed to determine feasibility of providing data on housing stock and quality and neighborhood condition from the imagery. Small scale imagery is shown to be of relatively marginal value in providing much of the data in the detail required, but can be useful for general survey purposes.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-127865 , USGS-IR-NASA-228
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    A study of an advanced confined linear energy source (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A literature survey and a test program to develop and evaluate an advanced confined linear energy source were conducted. The advanced confined linear energy source is an explosive or pyrotechnic X-Cord (mild detonating fuse) supported inside a confining tube capable of being hermetically sealed and retaining all products of combustion. The energy released by initiation of the X-Cord is transmitted through the support material to the walls of the confining tube causing an appreciable change in cross sectional configuration and expansion of the tube. When located in an assembly that can accept and use the energy of the tube expansion, useful work is accomplished through fracture of a structure, movement of a load, reposition of a pin, release of a restraint, or similar action. The tube assembly imparts that energy without release of debris or gases from the device itself. This facet of the function is important to the protection of men or equipment located in close proximity to the system during the time of function.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA-CR-112096
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    Recent progress in the remote detection of vapours and gaseous pollutants (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Work has been continuing on the correlation spectrometry techniques described at previous remote sensing symposiums. Advances in the techniques are described which enable accurate quantitative measurements of diffused atmospheric gases to be made using controlled light sources, accurate quantitative measurements of gas clouds relative to background using solar illumination and semi-quantitation measurements of well diffused atmospheric gases using solar illumination. Specific applications of these techniques are described including preliminary results of a high altitude balloon experiment designed to test the feasibility of measuring pollution at the earth's surface from high altitude balloons and satellites.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-127632
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  • 172
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    Long life high reliability thermal control systems study data handbook (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The development of thermal control systems with high reliability and long service life is discussed. Various passive and semi-active thermal control systems which have been installed on space vehicles are described. The properties of the various coatings are presented in tabular form.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA-CR-123734
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  • 173
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    Mathematical modeling of high and low temperature heat pipes (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Following a review of heat and mass transfer theory relevant to heat pipe performance, math models are developed for calculating heat-transfer limitations of high-temperature heat pipes and heat-transfer limitations and temperature gradient of low temperature heat pipes. Calculated results are compared with the available experimental data from various sources to increase confidence in the present math models. Complete listings of two computer programs for high- and low-temperature heat pipes respectively are included. These programs enable the performance to be predicted of heat pipes with wrapped-screen, rectangular-groove, or screen-covered rectangular-groove wick.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA-CR-122419
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  • 174
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    Spaceborne clock system: Some alternatives for a proposed NASA experiment (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A spaceborne clock experiment is proposed with the objectives of improving international time and frequency comparisons, studying precise one-way Doppler tracking and one-way ranging techniques, performing relativistic studies, and developing new atomic frequency standards technology. Various alternatives are considered for accomplishing these goals, including the use of existing satellite and earth-based time dissemination systems as well as the development of a new frequency standard for this specific application. One conclusion is that several attractive alternatives already exist for meeting the goal of improved time and frequency dissemination. However, to achieve all the other 4 goals at the NASA-stated levels of accuracy, a spaceborne atomic frequency standard may be required. An analysis of achievements to date with quartz oscillators, rubidium standards, cesium beam standards, hydrogen masers, and several other possibilities leads to the conclusion that cesium and rubidium standards offer the best choices for the experiment as proposed by NASA. The greatest obstacle to a spaceborne atomic standard appears to be its electrical power requirements.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-122394 , NBS-10735
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  • 175
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    The kinetics of reaction of the by-products of ablative materials at high temperatures and the rate of heat transfer between hot surfaces and reactive gases (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Research has been conducted by means of laboratory experiments to enhance understanding of the fundamental mechanisms of heterogeneous and homogeneous chemical reactions taking place during ablative processes that accompany the reentry or manned space vehicles into planetary atmospheres. Fundamental mechanisms of those chemical reactions believed to be important in the thermal degradation of ablative plastic heat shield materials, and the gases evolved, are described.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA-CR-114453
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    Hybrid thermocouple development program (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The design and development of a hybrid thermocouple, having a segmented SiGe-PbTe n-leg encapsulated within a hollow cylindrical p-SiGe leg, is described. Hybrid couple efficiency is calculated to be 10% to 15% better than that of a all-SiGe couple. A preliminary design of a planar RTG, employing hybrid couples and a water heat pipe radiator, is described as an example of a possible system application. Hybrid couples, fabricated initially, were characterized by higher than predicted resistance and, in some cases, bond separations. Couples made later in the program, using improved fabrication techniques, exhibited normal resistances, both as-fabricated and after 700 hours of testing. Two flat-plate sections of the reference design thermoelectric converter were fabricated and delivered to NASA Lewis for testing and evaluation.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-120875
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    Noise analysis of nucleate boiling (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The techniques of noise analysis have been utilized to investigate nucleate pool boiling. A simple experimental setup has been developed for obtaining the power spectrum of a nucleate boiling system. These techniques were first used to study single bubbles, and a method of relating the two-dimensional projected size and the local velocity of the bubbles to the auto-correlation functions is presented. This method is much less time consuming than conventional methods of measurement and has no probes to disturb the system. These techniques can be used to determine the contribution of evaporation to total heat flux in nucleate boiling. Also, these techniques can be used to investigate the effect of various parameters upon the frequency response of nucleate boiling. The predominant frequencies of the power spectrum correspond to the frequencies of bubble generation. The effects of heat input, degree of subcooling, and liquid surface tension upon the power spectra of a boiling system are presented. It was found that the degree of subcooling has a more pronounced effect upon bubble size than does heat flux. Also the effect of lowering surface tension can be sufficient to reduce the effect of the degree of subcooling upon the size of the bubbles.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA-CR-126382
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    Nimbus 4/IRLS Balloon Interrogation Package (BIP) (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The balloon interrogation package (BIP), an integral part of the overall interrogation, recording, and location subsystems (IRLS) for the Nimbus 4 program, is described. The BIP is a self-contained, integrated transponder designed to be carried aloft by a constant altitude, superpressure balloon to an altitude of 67,000 or 78,000 feet. After launch the BIP senses high-altitude balloon overpressure and temperature, and upon receipt of an interrogated command from the IRLS aboard the Nimbus 4 satellite, the BIP enodes the data on a real-time basis into a pulse-code modulation (PCM) format and transmits this data to the satellite. A summary of the program activity to produce 30 BIP systems and to support balloon launches from Ascension Island is presented.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-122375
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    Phase change materials handbook (1971)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: This handbook is intended to provide theory and data needed by the thermal design engineer to bridge the gap between research achievements and actual flight systems, within the limits of the current state of the art of phase change materials (PCM) technology. The relationship between PCM and more conventional thermal control techniques is described and numerous space and terrestrial applications of PCM are discussed. Material properties of the most promising PCMs are provided; the purposes and use of metallic filler materials in PCM composites are presented; and material compatibility considerations relevant to PCM design are included. The engineering considerations of PCM design are described, especially those pertaining to the thermodynamic and heat transfer phenomena peculiar to PCM design. Methods of obtaining data not currently available are presented. The special problems encountered in the space environment are described. Computational tools useful to the designer are discussed. In summary, each aspect of the PCM problem important to the design engineer is covered to the extent allowed by the scope of this effort and the state of the art.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA-CR-61363 , LMSC/HREC-D225138
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  • 180
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    Study of a remote probing technique for inhomogeneous media. (1971)
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    Publication Date: 2019-06-27
    Description: Study of remote probing of inhomogeneous media making use of the known reflection coefficient of the medium as a function of the varied incident angle of the probing plane wave. An analytical method is developed for processing these reflection coefficient data. A critical evaluation of the numerical aspects of the method is presented.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: IEEE; vol. 59
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  • 181
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    Levitation calorimetry. IV - The thermodynamic properties of liquid cobalt and palladium. (1971)
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    Publication Date: 2019-06-27
    Description: Some of the thermodynamic properties of liquid cobalt and palladium investigated by means of levitation calorimetry are reported and discussed. The presented data include the specific heats and heats of fusion of the liquid metals, and the emissivities of the liquid metal surfaces.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: Journal of Physical Chemistry; 75; Nov. 25
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  • 182
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    Transport properties of atomic hydrogen. (1971)
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    Description: Determination of a new set of values for the coefficients of viscosity and thermal conductivity of atomic hydrogen in the range from 1 to 100,000 K. The estimated error is about 5%. Quantal theory was used for low temperatures and classical theory for high temperatures. There is excellent agreement between the two theories as low as 20 K.-
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: Atomic Data; 3; Dec. 197
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  • 183
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    Compressibility measurements of gases using externally heated pressure vessels. (1971)
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    Publication Date: 2019-06-27
    Description: Most of the data collected under conditions of high temperature and pressure have been determined using a thick-walled bomb of carefully measured and fixed volume which is externally heated by an electric furnace or a thermostatically controlled bath. There are numerous variations on the basic method depending on the pressure-temperature range of interest, and the particular gas or gas mixture being studied. The construction and calibration of the apparatus is discussed, giving attention to the pressure vessel, the volume of the bomb, the measurement of pressure, the control and measurement of temperature, and the measurement of the amount and composition of gas in the bomb.
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  • 184
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    An investigation of the solidification of a metal and two n-paraffins using an acoustic technique. (1971)
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    Publication Date: 2019-06-27
    Description: A novel acoustic technique is described for following the motion of the solid-liquid interface during the freezing of mercury, n-hexadecane and n-octadecane where heat transfer is unidirectional. It is shown that the actual amount of solidification occurring in a given time differs from that predicted using a numerical solution to the transient heat conduction problem. The differences are small for mercury but large for the paraffins. They are interpreted in terms of the nature of the solid-liquid interface. Furthermore the experimental and predicted temperature distributions in the liquid and solid phases differ. These differences are extremely small for mercury. The data for the three materials conform to a relationship observed previously according to which the thickness of the solidified layer is a linear function of the square root of time.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: Applied Scientific Research; 25; Dec. 197
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  • 185
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    Geometrical factor and directional response of single and multi-element particle telescopes. (1971)
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    Publication Date: 2019-06-27
    Description: After a general treatment of the gathering power of particle telescopes, exact formulae are presented for the geometrical factor and directional response of multielement cylindrically symmetric telescopes with circular or rectangular cross sections. Some useful approximations to these formulae are given. For the gathering power in arbitrary geometries, there is a discussion of applicable digital computer techniques focusing particularly on a Monte Carlo method.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Nuclear Instruments and Methods; 95; 1971
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  • 186
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    Evaluation of the MSFC facsimile camera system as a tool for extraterrestrial geologic exploration (1971)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: Utility of the Marshall Space Flight (MSFC) facsimile camera system for extraterrestrial geologic exploration was investigated during the spring of 1971 near Merriam Crater in northern Arizona. Although the system with its present hard-wired recorder operates erratically, the imagery showed that the camera could be developed as a prime imaging tool for automated missions. Its utility would be enhanced by development of computer techniques that utilize digital camera output for construction of topographic maps, and it needs increased resolution for examining near field details. A supplementary imaging system may be necessary for hand specimen examination at low magnification.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-123596 , REPT-40
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  • 187
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    Safety assessment for EPS electron-proton spectrometer (1971)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: A safety analysis was conducted to identify the efforts required to assure relatively hazard free operation of the EPS and to meet the safety requirements of the program. Safety engineering criteria, principles, and techniques in applicable disciplines are stressed in the performance of the system and subsystem studies; in test planning; in the design, development, test, evaluation, and checkout of the equipment; and the operating procedures for the EPS program.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-128851 , EPS-425
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  • 188
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    Thermal control and heat storage by melting and freezing. Space thermal control development (1971)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: Current results of an experimental study of increasing phase change material thermal diffusivity by means of solid fillers are reported. Aluminum honeycomb appears to offer the best improvement of any of the fillers investigated to date. Details of the experimental method developed in the present study for rapidly determining thermal diffusivities with a precision of about 10 percent are also reported. Further concepts regarding phase change material thermal diffusivity enhancement and of phase change material operation are discussed.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA-CR-124214 , HREC-5183-1 , LMSC/HREC-D162884
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  • 189
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    Combustion dynamics in liquid rocket engines (1971)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: A chemical analysis of the emission and absorption spectra in the combustion chamber of a nitrogen tetroxide/aerozine-50 rocket engine was conducted. Measurements were made under conditions of preignition, ignition, and post combustion operating periods. The cause of severe ignition overpressures sporadically observed during the vacuum startup of the Apollo reaction control system engine was investigated. The extent to which residual propellants or condensed intermediate reaction products remain after the engine has been operated in a pulse mode duty cycle was determined.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA-CR-128898 , DRI-2577
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  • 190
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    A program in refractory metal thermocouple research. (1971)
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    Publication Date: 2019-06-27
    Description: Description of a refractory metal thermocouple research program, directed towards establishing the parameters that are necessary to achieve reliable, long term, high temperature thermocouple performance. A description of special apparatus for exposing bare-wire thermoelements to high temperatures in vacuum and in high purity gaseous environments is given, and the design and performance of an ultra-high-vacuum, high-temperature furnace system are described. Bare-wire W-3 per cent Re and W-25 per cent Re thermoelements were exposed at 2400 K in argon, hydrogen, or vacuum, and experienced a shift in their emf-temperature relationship upon initial exposure. After the initial shift, the thermoelements exposed in the gaseous environments experienced no significant further change in their emf-temperature relationship for periods up to 1000 hrs. The thermoelements exposed in vacuum continually drifted in their emf-temperature relationship as a result of the preferential loss of Re by evaporation.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Journal of Research; vol. 75C
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  • 191
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    Calibration of a laboratory spectrophotometer for specular light by means of stacked glass plates. (1971)
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    Publication Date: 2019-06-27
    Description: Stacked glass plates have been used to calibrate a laboratory spectrophotometer, over the spectral range 0.5-2.5 microns, for specular light. The uncalibrated instrument was characterized by systematic errors when used to measure the reflectance and transmittance of stacked glass plates. Calibration included first, a determination of the reflectance of a standard composed of barium sulfate paint deposited on an aluminum plate; second, the approximation of the reflectance and transmittance residuals between observed and computed values by means of cubic equations; and, finally, the removal of the systematic errors by a computer. The instrument, after calibration, was accurate to 1% when used to measure the reflectance and transmittance of stacked glass plates.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Review of Scientific Instruments; 42; Dec. 197
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  • 192
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    Channel electron multiplier efficiency for protons of 0.2-10 keV. (1971)
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    Publication Date: 2019-06-27
    Description: The initial results of absolute proton efficiency measurements made in an auroral particle study by sounding rockets are given. The measurements were made at several counting rates from 1000 to 40,000 counts/sec on rocket-borne equipment. The results agree with those of Egidi et al. (1969) in the high energy range and show a disagreement at low energies.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Review of Scientific Instruments; 42; Nov. 197
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  • 193
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    A thermal conductivity cell for small powdered samples. (1971)
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    Publication Date: 2019-06-27
    Description: A thermal conductivity cell is described for making measurements of the thermal conductivity and thermal diffusivity of small samples of powdered dielectric materials. The principle used is that of the line heat source. A novel way is described for applying this method so that much smaller samples than normal may be tested. This size requirement is necessary for investigations involving limited samples as does the Lunar Science Program. The method is checked by measuring the conductivity of standard samples and comparing the results with those found in the literature.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Review of Scientific Instruments; 42; Nov. 197
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  • 194
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    Radiative transfer effects on reflected shock waves. I - Transparent gas. (1971)
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    Publication Date: 2019-06-27
    Description: Analytical and numerical calculation of the effects of radiative cooling on the flow field and heat transfer behind a reflected shock wave. The analytical solutions are developed by an expansion procedure about the Newtonian limit - i.e., the flow variables are expanded in the small parameter epsilon representing the initial density ratio across the shock front. Solutions carried out through the zeroth- and first-orders in epsilon show an accuracy to the order of epsilon squared - namely, for the specific conditions considered the analytically calculated enthalpy changes agree to within 2% with the numerically computed changes. The numerical procedure consists of a finite-difference calculation with pressure gradients neglected. The analytical calculations show that pressure-gradient effects may be neglected, except at very long times when the shocked gas has cooled by a large amount. The present calculations show much greater shock-wave attenuation than does a previous numerical computation. This difference is attributed to a better representation of the thermodynamic properties in the present calculations.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: AD-737423 , Physics of Fluids; 14; Dec. 197
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  • 195
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    Capabilities of a single scan TV-radiographic system for digital data acquisition. (1971)
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    Publication Date: 2019-06-27
    Description: A single scan TV-radiography system capable of providing analogue signals ready for A-D conversion for input to a computer has been investigated. Modulation transfer functions of both horizontal and vertical resolution have been obtained. The capability for gray scale reproduction was also investigated. The output data rate of the system is 16 KHz thereby providing compatibility to A-D converters generally available for most computers. In general, the capability of the system was found to exceed the input capabilities of available image-amplifiers and is therefore acceptable for quantitative fluoroscopic applications.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Investigative Radiology; 6; July-Aug
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  • 196
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    Dielectric siphons. (1971)
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    Publication Date: 2019-06-27
    Description: The normally weak polarization force density, exerted on insulating dielectric liquids by a nonuniform electric field, is enhanced if high pressures are used. The nonuniform electric field acts as an elastic ?wall' to contain and guide the dielectric fluid. A general theory for these electrohydrodynamic (EHD) conduits has been developed. An illustrative example of the EHD conduits is the dielectric siphon consisting of two U-shaped electrodes held adjacent to each other by insulating nylon screws.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Science; 174; Dec. 17
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  • 197
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    A statistical mechanical calculation of the thermodynamic properties of interstitial solid solutions involving second nearest neighbor interactions. (1971)
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    Publication Date: 2019-06-27
    Description: A previous calculation of the thermodynamic properties of interstitial solid solutions based on the technique of Kirkwood expansions has been extended to include the effects of second nearest neighbor solute atom mutual interactions. The error inherent in the first order (or quasi-chemical) counting of the degeneracy of the solution crystal is avoided. It is shown that, at high temperatures, even strong second nearest neighbor solute mutual interactions have a negligible effect on the entropy of the solution and a small, temperature-dependent effect on the solute partial enthalpy.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: Acta Metallurgica; 20; Jan. 197
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  • 198
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    Combustion of a premixed system in stagnation flow. I - Theoretical. (1971)
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    Publication Date: 2019-06-27
    Description: The theoretical steady-state and transient characteristics of a premixed combustible system in laminar axisymmetric stagnation flow are studied by way of numerical solution of the governing boundary-layer equations. Computations, which are based on the oxidation reaction of carbon monoxide in humid air, invoke a minimum of simplifying assumptions. Steady-state results include prediction of (1) profiles of the state variables, (2) extinction of blow-off conditions, (3) ignition conditions, and (4) the heat flux to the stagnation point. Computer simulations of the unsteady state provide an indication of the stability of a given steady state to perturbations. Comparisons between some of the predictions of the mathematical model and the results of laboratory experiments will be reported in Part II.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: AD-743387 , AROD-5648-8-E , Combustion Science and Technology; 4; Nov. 197
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  • 199
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    Combustion stabilization with acoustic cavities. (1971)
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    Description: An experimental and analytical study has been performed to develop the technology necessary for effective use of acoustic cavities to suppress acoustic modes of combustion instability. An unbaffled variation of the LM ascent engine has been made dynamically stable with acoustic cavities only; five different cavity configurations were found sufficient to produce dynamic stability. An analytical model was developed to calculate the damping contributed by the cavity. Further, subscale tests were made to determine the nonlinear acoustic impedance of these cavities.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: Journal of Spacecraft and Rockets; 8; Dec. 197
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  • 200
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    Application of holographic optical techniques to bulk memory. (1971)
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    Publication Date: 2019-06-27
    Description: Current efforts to exploit the spatial redundancy and built-in imaging of holographic optical techniques to provide high information densities without critical alignment and tight mechanical tolerances are reviewed. Read-write-erase in situ operation is possible but is presently impractical because of limitations in available recording media. As these are overcome, it should prove feasible to build holographic bulk memories with mechanically replaceable hologram plates featuring very fast (less than 2 microsec) random access to large (greater than 100 million bit) data blocks and very high throughput (greater than 500 Mbit/sec). Using volume holographic storage it may eventually be possible to realize random-access mass memories which require no mechanical motion and yet provide very high capacity.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: IEEE PAPER 19,4
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