The temperature dependence of the response of 103a-0 and Tri-X at 4400 A
Temperature effects on 103a-0 and Tri-X photographic emulsion sensitivities at 4400 A
Gilliam, L. B.↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Structure of silicon films deposited on oxidized silicon wafers
Silane for polycrystalline films deposition on oxidized silicon wafers, noting substrate temperature effects on preferred orientation of deposits
Catlin, A.↗
Track etching parameters for plastics
Etchant type, concentration and temperature effect on various plastics track etching ratio and sensitivity
Blanford, G. E., Jr.↗
Thermionic reactor systems for electric propulsion
Thermionic reactor electric spacecraft propulsion system for unmanned outer planets missions, investigating voltage and radiator temperature effects on weight
Mondt, J. F.↗
The hydrolysis of proteins
Proteins hydrolysis, investigating temperature effect on reaction, determining optimum conditions for maximum amino acids yields
Gehrke, C. W.↗
Some numerical results on viscous low-density nozzle flows in the slender-channel approximation
Viscous convergent-divergent nozzle flow slender channel approximation, discussing nozzle geometry, Reynolds number and wall temperature effects
Rae, W. J.↗
A Jupiter atmospheric entry mission
Jupiter atmospheric entry probe mission, discussing descent depths, atmospheric pressure and temperature effects, data return techniques and Grand Tour Missions
Carroll, P. C.↗
Solar array technology for lunar surface applications
Solar array technology for lunar surface applications including silicon cells, cadmium sulphide thin films, temperature effects, prototype module and radiation degradation
Boretz, J. E.↗
Long-term tests of copper sulfide-cadmium sulfide thin-film solar cells under simulated orbital conditions
Copper sulfide-cadmium sulfide thin film solar cells under simulated orbital conditions, including thermal cycling, constant illumination and temperature effects
Clarke, D. R.↗
Temperature dependence of the long-wavelength optical phonons in diamond
Temperature effects on long wavelength photon frequency and linewidth in diamond, using Raman scattering techniques
Anastassakis, E.↗
Influence of target temperature on crater morphology and implications on the origin of craters on lunar glass spheres
Lunar glass spheres cratering origin hypothesis from target temperature effects on crater morphology in targets impacted by high velocity Al projectiles
Carter, J. L.↗
Thermoregulatory responses of a hibernator to preoptic and environmental temperatures
Preoptic and environmental temperature effects on hibernator thermoregulatory responses, noting changes in metabolic rates
Heath, J. E.↗
Development of mathematical models of environmental physiology
Selected articles concerned with mathematical or simulation models of human thermoregulation are presented. The articles presented include: (1) development and use of simulation models in medicine, (2) model of cardio-vascular adjustments during exercise, (3) effective temperature scale based on simple model of human physiological regulatory response, (4) behavioral approach to thermoregulatory set point during exercise, and (5) importance of skin temperature in sweat regulation.
Stolwijk, J. A. J.↗
Heat-transfer testing procedures in phase B shuttle studies with emphasis on phase change data improvement
The procedures used in the application of the phase change technique to the phase B shuttle configuration are discussed along with factors which may affect data accuracy. These factors include variation of thermal properties of phase change model material, sensitivity of measured heat transfer coefficients to the assumed value of the adiabatic to total temperature ratio, and wall temperature effects. These sensitivities are illustrated in sample calculations for a shuttle geometry. Factors which may affect the visual clarity and interpretation of phase change data are discussed, and a method of improving photographic data quality through the use of polarized light is presented.
Throckmorton, D. A.↗
Ultraviolet observations of weak-helium stars
Ultraviolet filter photometry aboard OAO-2 has been carried out for the weak helium stars 3 Cen A, 3 Sco, HD 144334, HD 21699, HD 144844, alpha Scl, HR 8535, HR 8770 and HD 144661. The flux distribution is compared with that of B3 to B8 main sequence and giant stars in terms of color-color diagrams. When allowance is made for line blocking shortward of 2800 A that most of the weak helium stars have normal fluxes in good agreement with their ground-based colors. The star alpha Scl is a light and spectrum variable. The strengthening of Ti II and Sr II lines around 2400 A appears to redistribute flux longward of the Balmer discontinuity. The flux distribution indicates an effective temperature about 1500 K higher than previously determined.
Bernacca, P. L.↗
C-4 155 nm line in beta Cephei
The class of early B variable stars known as beta Cephei stars are characterized by short-period radial velocity and light variations. The coolest stars of this group have an effective temperature of about 20,000 K and the hottest, about 28,000 K. These stars are not related to the classical Cepheids whose temperatures are of the order of 6000 K. The amplitude of the radial velocity variation beta Cephei stars is in the tens of kilometers per second and the light variation is less than 0.2 mag, that is, less than 10 percent. The fastest pulsation interval is 3 hr and the slowest is 6 hr. The prototype beta Cephei has a period of 4 hr 34 min. Ultraviolet observations were taken using OAO 2 to investigate the relationship between the visual and the ultraviolet variations.
Fischel, D.↗
Quantitative results of stellar evolution and pulsation theories.
The discrepancy between the masses of Cepheid variables deduced from evolution theory and pulsation theory is examined. The effect of input physics on evolutionary tracks is first discussed; in particular, changes in the opacity are considered. The sensitivity of pulsation masses to opacity changes and to the ascribed values of luminosity and effective temperature are then analyzed. The Cepheid mass discrepancy is discussed in the light of the results already obtained. Other astronomical evidence, including the mass-luminosity relation for main sequence stars, the solar neutrino flux, and cluster ages are also considered in an attempt to determine the most likely source of error in the event that substantial mass loss has not occurred.
Fricke, K.↗
Observations of zeta Puppis.
The visual line spectrum of zeta Puppis (O4f) cannot be matched by theoretical line profiles computed by Auer and Mihalas (1971) from their non-LTE models. The discrepancy between observation and prediction suggests that deviations from plane-parallel geometry and hydrostatic equilibrium must be accounted for in order for models to represent the atmospheric regions forming the observed lines. Relaxation of these classical assumptions may affect the value of effective temperature for this star derived from observations of its continuous spectrum.
Heap, S. R.↗