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  • EARTH RESOURCES AND REMOTE SENSING  (4)
  • ACOUSTICS  (1)
  • Magnetism
  • Surface physics, nanoscale physics, low-dimensional systems
  • 1975-1979  (5)
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Keywords
Years
Year
  • 1
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    Three dimensional thermal pollution models. Volume 3: Free surface models (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Two sets of programs, named Nasum 2 and Nasum 3 are presented in detail. Nasum 2 is a far field formulation and is used without including the plant thermal discharge. Nasum 3 uses horizontal stretching to provide higher resolution at thermal discharge joints; and includes far field influences such as varying tides and ambient currents far from point of discharge.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-154624-VOL-3 , KSC-TR-43-2-VOL-3
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Three dimensional thermal pollution models. Volume 1: Review of mathematical formulations (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A mathematical model package for thermal pollution analyses and prediction is presented. These models, intended as user's manuals, are three dimensional and time dependent using the primitive equation approach. Although they have sufficient generality for application at sites with diverse topographical features; they also present specific instructions regarding data preparation for program execution and sample problems. The mathematical formulation of these models is presented including assumptions, approximations, governing equations, boundary and initial conditions, numerical method of solution, and same results.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-154624-VOL-1 , KSC-TR-43-2-VOL-1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Low frequency cabin noise reduction based on the intrinsic structural tuning concept: The theory and the experimental results, phase 2 (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Low frequency cabin noise and sonically induced stresses in an aircraft fuselage may be reduced by intrinsic tuning of the various structural members such as the skin, stringers, and frames and then applying damping treatments on these members. The concept is also useful in identifying the key structural resonance mechanisms controlling the fuselage response to broadband random excitation and in developing suitable damping treatments for reducing the structural response in various frequency ranges. The mathematical proof of the concept and the results of some laboratory and field tests on a group of skin-stringer panels are described. In the so-called stiffness-controlled region, the noise transmission may actually be controlled by stiffener resonances, depending upon the relationship between the natural frequencies of the skin bay and the stiffeners. Therefore, cabin noise in the stiffness-controlled region may be effectively reduced by applying damping treatments on the stiffeners.
    Keywords: ACOUSTICS
    Type: NASA-CR-145262 , D6-44283 , D748-10113-3
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Three Dimensional Thermal Pollution Models (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: Three versions of rigid lid programs are presented: one for near field simulation; the second for far field unstratified situations; and the third for stratified basins, far field simulation. The near field simulates thermal plume areas, and the far field version simulates larger receiving aquatic ecosystems. Since these versions have many common subroutines, a unified testing is provided, with main programs for the three possible conditions listed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-154624-VOL-2 , KSC-TR-43-2-VOL-2
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Remote sensing applied to numerical modelling (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Progress and remaining difficulties in the construction of predictive mathematical models of large bodies of water as ecosystems are reviewed. Surface temperature is at present the only variable than can be measured accurately and reliably by remote sensing techniques, but satellite infrared data are of sufficient resolution for macro-scale modeling of oceans and large lakes, and airborne radiometers are useful in meso-scale analysis (of lakes, bays, and thermal plumes). Finite-element and finite-difference techniques applied to the solution of relevant coupled time-dependent nonlinear partial differential equations are compared, and the specific problem of the Biscayne Bay and environs ecosystem is tackled in a finite-differences treatment using the rigid-lid model and a rigid-line grid system.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Remote sensing: Energy-related studies; Dec 02, 1974 - Dec 04, 1974; Miami, FL
    Format: text
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    NASA TECHNICAL REPORTS
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