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  • 1
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    Mauna Kea (1974)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Mauna Kea, the highest of Hawaii's five volcanoes, is the only high landmass in the central Pacific Ocean basin to bear unmistakable signs of Pleistocene glaciation. The stratigraphic record indicates that a summit ice cap formed and disappeared at least four times in the last 250,000 years, and that volcanic eruptions characterized not only the interglacial intervals, but also two of the glacial periods as well. Exposed rock units on the upper slopes of Mauna Kea have been divided into two major groups based on gross lithologic character. The Hamakua Group comprises the bulk of the subaerial shield of the volcano and consists largely of thin-bedded pahoehoe flows of olivine basalt. The overlying Laupahoehoe Group consists of a thin cap of alkalic lavas and pyroclastic layers confined largely to the upper slopes of the mountain. Interstratified with the volcanic units are sedimentary formations that provide evidence of four episodes of ice cap glaciation.
    Keywords: GEOPHYSICS
    Type: NASA. Ames Res. Center Guidebook to the Hawaiian Planetology Conf.; p 239-246
    Format: text
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  • 2
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    Silicon camera development (1973)
    In:  CASI
    Details
    Publication Date: 2005-08-31
    Keywords: GENERAL
    Type: Ann. Progr. Rev.; 5 p
    Format: text
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  • 3
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    Use of Sirtl etch for silicon-slice evaluation. (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: An investigation was conducted to explore the possibility of using Sirtl etch as a nondestructive evaluation step for categorizing silicon wafers before device fabrication is begun. It is known that chromium is deposited as a residue during the chemical reaction associated with etching silicon in Sirtl etch. There has been concern that the use of Sirtl etch could result in the diffusion of chromium into the silicon slice during subsequent high-temperature processing steps. The investigation revealed, however, that residual chromium resides only on the surface of the slice and can easily be removed.
    Keywords: PHYSICS, SOLID-STATE
    Type: Electrochemical Society; vol. 120
    Format: text
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  • 4
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    Microwave characteristics of the ocean surface in the 1-10 GHz band (1972)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The microwave characteristics of calm, rough, and foam-covered ocean surfaces were studied, and a technique was developed for deriving thermodynamic ocean surface temperatures from brightness temperatures measured by an earth-orbiting radiometer. This investigation encompassed frequencies in the range 1 to 10 GHz (wavelength range of 30 to 3 cm) and was based on the use of a one-dimensional geometrical optics roughness model, including shadowing and multiple scattering of radiant electromagnetic energy. Provision is made in the model for characterizing surface roughness through the rms slope versus wind velocity relations previously established. Suitable foam and atmospheric models were superimposed on the roughness model.
    Keywords: GEOPHYSICS
    Type: NASA. Manned Spacecraft Center 4th Ann. Earth Resources Program Rev., Vol. 4; 19 p
    Format: application/pdf
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  • 5
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    Study of blood flow sensing with microwave radiometry (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A study and experimental investigation has been performed to determine the feasibility of measuring regional blood flow and volume in man by means of microwave radiometry. An indication was expected of regional blood flow from measurement of surface and subsurface temperatures with a sensitive radiometer. Following theoretical modeling of biological tissue, to determine the optimum operating frequency for adequate sensing depth, a sensitive microwave radiometer was designed for operation at 793 MHz. A temperature sensitivity of of 0.06 K rms was realized in this equipment. Measurements performed on phantom tissue models, consisting of beef fat and lean beefsteak showed that the radiometer was capable of sensing temperatures from a depth between 3.8 and 5.1 cm. Radiometric and thermodynamic temperature measurements were also performed on the hind thighs of large dogs. These showed that the radiometer could sense subsurface temperatures from a depth of, at least, 1.3 cm. Delays caused by externally-generated RF interference, coupled with the lack of reliable blood flow measurement equipment, prevented correlation of radiometer readings with reginal blood flow. For the same reasons, it was not possible to extend the radiometric observations to human subjects.
    Keywords: BIOSCIENCES
    Type: NASA-CR-114675
    Format: application/pdf
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  • 6
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    Classical dynamical investigations of reaction mechanism in three-body hydrogen-halogen systems. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Keywords: CHEMISTRY
    Type: Journal of Chemical Physics; 58; Apr. 1
    Format: text
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  • 7
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    Effectiveness evaluation of STOL transport operations (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A short-takeoff and landing (STOL) systems simulation model has been developed and implemented in a computer code (known as STOL OPS) which permits evaluation of the operation of a STOL aircraft and its avionics in a commercial airline operating environment. STOL OPS concentrated on the avionics functions of navigation, guidance, control, communication, hazard aviodance, and systems management. External world factors influencing the operation of the STOL aircraft include each airport and its geometry, air traffic at each airport, air traffic control equipment and procedures, weather (including winds and visibility), and the flight path between each airport served by the route. The development of the STOL OPS program provides NASA a set of computer programs which can be used for detailed analysis of a STOL aircraft and its avionics and permit establishment of system requirements as a function of airline mission performance goals.
    Keywords: AIRCRAFT
    Type: NASA-CR-114631
    Format: application/pdf
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  • 8
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    Shuttle operations simulation model programmers'/users' manual (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The prospective user of the shuttle operations simulation (SOS) model is given sufficient information to enable him to perform simulation studies of the space shuttle launch-to-launch operations cycle. The procedures used for modifying the SOS model to meet user requirements are described. The various control card sequences required to execute the SOS model are given. The report is written for users with varying computer simulation experience. A description of the components of the SOS model is included that presents both an explanation of the logic involved in the simulation of the shuttle operations cycle and a description of the routines used to support the actual simulation.
    Keywords: COMPUTERS
    Type: NASA-CR-123735 , ASD-ASTN-1533
    Format: application/pdf
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  • 9
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    Long-term material compatibility testing system (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: System includes procedure for hermetically sealing solid materials and fluids in glass ampoule and use of temperature-controlled facility containing sample holder, which permits sample containers to be retrieved safely and conveniently. Solid material and fluid are sealed within chemically-clean glass ampoule according to highly detailed procedure.
    Keywords: MATERIALS
    Type: NPO-11776
    Format: application/pdf
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  • 10
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    Dynamics of the molecular and atomic mechanisms for the hydrogen-iodine exchange reaction. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The molecular and atomic mechanisms for the hydrogen-iodine exchange reaction are treated theoretically by means of extensive classical trajectories calculated on a reasonable potential energy surface on which the single adjustable parameter is the iodine-core effective charge. The analysis shows the molecular mechanism to be dynamically forbidden, but gives an over-all rate constant for the atomic mechanism that is in agreement with the experimental values. It is indicated that the formation of a weak H2I complex plays an important dynamical role if the atomic mechanism is limited to reactions with collision complexes involving no more than two hydrogen atoms and two iodine atoms. Excellent agreement with experiment is obtained for the rate constant for the recombination I+I+H2 yields I2+H2 and its negative temperature coefficient.
    Keywords: CHEMISTRY
    Type: Journal of Chemical Physics; 56; June 15
    Format: text
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