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  • 1
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    A system for mapping and monitoring subsurface processes in enhanced-recovery schemes (1979)
    In:  Istanbul, no. 132, pp. 7-22
    Details
    Publication Date: 1979
    Keywords: Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Applied geophysics
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Information transfer during contingency operations: Emergency air-ground communications (1981)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Safety related problems are reported which occur as a consequence of information transfer deficiencies that arise when air/ground communications are (or should be) used as a resource in inflight emergency situations. The system factors, the human errors, and the associated causes of these problem are defined.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: Inform. Transfer Probl. in the Aviation System; p 73-83
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    The effects of stability augmentation on the gust response of a STOL aircraft during a curved manual approach (1975)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The task of investigating the effect of SAS was formulated as two optimal control problems for stochastic systems: (1) to compute SAS gains with a rate model in the performance index algorithm; and (2) to calculate the pilot gains and system gust response using an optimal pilot model. Both problems were solved to yield reasonable low gains for the pilot and SAS, and the lateral directional mode poles and the longitudinal short period poles could be placed accurately by the model matching algorithm. Of the longitudinal (SAS) poles achieved, the vertical rms path error was least for the unaugmented poles. The lateral rms path error was an order of magnitude larger than the vertical error and showed a plus or minus 50 percent variation with SAS. It increased with dutch roll frequency and damping, and it decreased most significantly with increased roll stability. The variation in lateral error with bank angle for curved flight was also a significant function of the augmented poles.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: NASA. Ames Res. Center 11th Ann. Conf. on Manual Control; p 486-503
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Some proposed experiments with the Communications Technology Satellite (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The satellite (CTS) is tentatively scheduled to be launched in January 1976. It will be available for educational and societal experimentation early in 1977. This paper will outline some of the educational experiments involving the CTS. The major object of the experiments is to assess the communications and educational implications of the CTS in northern Ontario; the existing communications facilities for this region of approximately 725,000 sq km (inhabited largely by native people) are extremely limited. It is expected to assess the extent to which: (1) a satellite communications system might resolve the communications deficiency, (2) the native people will use the experimental facility, and (3) health and general educational programs, especially utilizing the interactive mode, will be viable.
    Keywords: COMMUNICATIONS AND RADAR
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    An analytic formulation for heating source memory in the thermospheric composition (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Numerical calculations from a spectral circulation model are utilized to construct an analytic Green's function formulation describing the meridional, time-dependent thermospheric composition and temperature response during magnetic storms. The purpose is to develop a formulation that embodies source memory while being sufficiently simple to serve as a heuristic guide for empirical modeling. By passing from the discrete Fourier series representation, utilized for the numerical circulation model, to a continuous Fourier integral representation, explicit waves are obtained for the thermospheric response times. The response times are altitude and species dependent and can exceed two days below 200 km. Thus, for certain storm scenarios, pronounced source memory signatures for the composition and temperature are predicted. Response times obtained from the formulation are shown to give a response consistent with previously published neutral composition data from AE-C for the February 1974 storm when an ap dependent heat source is employed.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 86; May 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Semiempirical modeling of thermospheric magnetic storms (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: An improved formulation for empirical modeling of magnetic storm effects in neutral thermospheric composition and temperature is utilized in a study of two disturbed periods. The formulation, which incorporates the prior history of the heat input rather than a single phase delay, is based on a Fourier integral representation of an existing theoretical model. This results in an improved representation of the detailed time variations and a better carry-over of model parameters from one storm to the other and provides a basis for theoretical interpretation.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 86; May 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Waste heat management and regulatory problems (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA, Washington Proc. of the Conf. on Waste Heat Management and Util., volume 1; 11 p
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    NASA TECHNICAL REPORTS
  • 8
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    Comparison of Monte Carlo and continuous slowing-down approximation treatments of 1-keV proton energy deposition in N2 (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: Journal of Applied Physics; 46; Nov. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Practical applications of interactive voice technologies: Some accomplishments and prospects (1977)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A technology assessment of the application of computers and electronics to complex systems is presented. Three existing systems which utilize voice technology (speech recognition and speech generation) are described. Future directions in voice technology are also described.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NADC, Proceedings: Voice Technology for Interactive Real-Time Command(Control Systems Application; p 217-234
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    CO2 and CO electron vibrational cooling rates (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Electron cooling rates for electron vibrational excitation of CO2 and CO and rotational excitation of CO are calculated. Results of the calculation are expressed as closed form analytic relations that are both convenient for numerical calculations and valid over a wide range of electron and neutral temperatures. It is found that the cooling rates and their temperature dependences differ significantly from other calculations. For CO2, these differences are related mainly to the assumptions about the approach to equilibrium and not to the actual cross-section choices. For electron temperatures below 1000 K and gas temperatures near 300 K (representative of conditions in the Venus atmosphere, where collisional cooling of the electrons dominates), the CO2 cooling rate is as much as an order of magnitude larger than previously considered in ionospheric models.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research; 84; Nov. 1
    Format: text
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    NASA TECHNICAL REPORTS
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