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  • 1
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    Tectonics and volcanisms of Mars (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Televised images of Mars transmitted from interplanetary stations are used to develop a theory of the structure and development of the planet. Crater chronology, the structure of planetary bodies in the Earth group, and a comparison of the Earth planetary bodies are among the factors included.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-75604
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Preliminary results of a gamma-ray burst study in the Konus experiment on the Venera-11 and Venera-12 space probes (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: Twenty-one gamma-ray bursts and 68 solar flares in the hard X-ray range were detected on Venera-11 and Venera-12 space probes during the initial 50-day observation period. Major characteristics of the equipment used and preliminary data on the temporal structure and energy spectra of the gamma-ray bursts are considered. The pattern of gamma-ray burst frequency distribution vs. intensity, N(S), is established.
    Keywords: SPACE RADIATION
    Type: NASA-TM-75610
    Format: application/pdf
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  • 3
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    Changes of gas metabolism, gas homeostasis and tissue respiration in rats during prolonged hypokinesia (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The oxygen uptake and tissue gas homeostasis of restrained albinic rats remained relatively constant during a 60 day experiment. The gas metabolism in some tissues changed, and O2 consumption increased in the liver and decreased in the myocardium. Capacity for physical work was reduced by five times. Hypokinesia for 60 days resulted in a delay in the animals growth.
    Keywords: LIFE SCIENCES (GENERAL)
    Type: NASA-TM-75982
    Format: application/pdf
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  • 4
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    A flaring X-ray pulsar in Dorado (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A study of unusual gamma-ray bursts detected on March 5 and March 6, 1979 in the KONUS experiment on the Venera 11 and Venera 12 spacecraft shows their source to be flaring X-ray pulsar in Dorado.
    Keywords: ASTRONOMY
    Type: NASA-TM-75658 , REPT-617
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Comparisons of observed seasonal climate features with a winter and summer numerical simulation produced with the GLAS general circulation model (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Results are presented from numerical simulations performed with the general circulation model (GCM) for winter and summer. The monthly mean simulated fields for each integration are compared with observed geographical distributions and zonal averages. In general, the simulated sea level pressure and upper level geopotential height field agree well with the observations. Well simulated features are the winter Aleutian and Icelandic lows, the summer southwestern U.S. low, the summer and winter oceanic subtropical highs in both hemispheres, and the summer upper level Tibetan high and Atlantic ridge. The surface and upper air wind fields in the low latitudes are in good agreement with the observations. The geographical distirbutions of the Earth-atmosphere radiation balance and of the precipitation rates over the oceans are well simulated, but not all of the intensities of these features are correct. Other comparisons are shown for precipitation along the ITCZ, rediation balance, zonally averaged temperatures and zonal winds, and poleward transports of momentum and sensible heat.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: WMO Climate Models: Performance, Intercomparison and Sensitivity Studies, Vol. 1; p 207-253
    Format: text
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  • 6
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    T and F comparisons via broadcasting satellite and navigation technology satellite (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The preliminary time/frequency dissemination experiments were made using the BSE. In order to establish the technique of the doppler shift canceling, the phase control servo including the satellite link and the precompensating frequency control using the measured values or using the orbital data of the satellite are tested. The amount of the residual doppler shift at the control station can be reduced to the order of 1 part in 10 to the 12th power or less by use of the first and the second methods. The method using the orbit data is expected to give a control capability of a few parts in 10 to 11th power. Thus, the maximum value of the doppler shift at the farther most place of the country is estimated to be + or - 2 x 10 to the -10 power without any correction. The experiment of the international time comparison via the NTS 1 was made for about one year since October 1978. The data of time difference between UTC(USNO) and UTC(RRL) are in good agreement with those via the portable clock of the USNO. By applying the correction for ionospheric delay the standard deviation of the data can be reduced to about one-half.
    Keywords: PHYSICS (GENERAL)
    Type: NASA. Goddard Space Flight Center Proc. of the 11th Ann. Precise Time and Time Interval (PTTI) Appl. and Planning Meeting; p 315-328
    Format: text
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  • 7
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    Cryostatic influence of Formvar coatings on sizing of the stabilizer in superconductive NbTi-Cu - Conductor bundle effects (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: In continuation of single-conductor studies, quench onset data of quasi-steady operation are reported for a Formvar-coated composite (Nb48Ti/Cu) in bundle geometry (conductor thickness about 0.2 cm, approximately square cross section). Overall thermal conductances of the heater simulation technique applied are of the order 0.1 W/(sq cm-K), comparable to single-specimen results, around 4 K and below the lambda transition in agreement with model predictions. Considerable deterioration, however, occurs below 3 K and down to the lambda temperature during operation in near-saturated He I. Consequences for magnets of intermediate energy density are discussed with emphasis on the modifications necessitated by coatings.
    Keywords: SOLID-STATE PHYSICS
    Format: text
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  • 8
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    Adaptive allocation of decisionmaking responsibility between human and computer in multitask situations (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: As human and computer come to have overlapping decisionmaking abilities, a dynamic or adaptive allocation of responsibilities may be the best mode of human-computer interaction. It is suggested that the computer serve as a backup decisionmaker, accepting responsibility when human workload becomes excessive and relinquishing responsibility when workload becomes acceptable. A queueing theory formulation of multitask decisionmaking is used and a threshold policy for turning the computer on/off is proposed. This policy minimizes event-waiting cost subject to human workload constraints. An experiment was conducted with a balanced design of several subject runs within a computer-aided multitask flight management situation with different task demand levels. It was found that computer aiding enhanced subsystem performance as well as subjective ratings. The queueing model appears to be an adequate representation of the multitask decisionmaking situation, and to be capable of predicting system performance in terms of average waiting time and server occupancy. Server occupancy was further found to correlate highly with the subjective effort ratings.
    Keywords: SYSTEMS ANALYSIS
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Versatile digital signal processor for dc to dc converters (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Digital signal processor (DSP) for dc-to-dc converters, processes all incoming signals and transmits correct signal to operate power switch.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LEW-13020 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 170
    Format: text
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  • 10
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    Solar Stirling system development (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A low-cost, high-efficiency dish-Stirling solar thermal-electric power system is being developed for test in 1981. System components are the solar concentrator, receiver, fossil fuel combustor, thermal energy storage (TES), engine-generator, and power processing. System conceptualization is completed and design is in progress. Two receiver alternatives are being evaluated, a direct-coupled receiver-engine configuration with no TES and a heat pipe receiver with TES. System cost projections are being made. Goals for the system development task are (1) to develop an advanced dish-Stirling technology, utilizing a team of industrial contractors, (2) to demonstrate that technology at the system level, and (3) to determine how to achieve low production cost.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: AIAA PAPER 79-1009 , American Institute of Aeronautics and Astronautics, Terrestrial Energy Systems Conference; Jun 04, 1979 - Jun 06, 1979; Orlando, FL
    Format: text
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