Minor planets. II.
Photographic magnitude of minor planets, discussing photometric system and Indiana University asteroid program observations
Gehrels, T.↗
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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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A search for minor constituents in the atmosphere of Venus.
Venus spectrum studied in search for minor constitutents in atmosphere
Owen, T.↗
Changes in minority-carrier lifetime in silicon and gallium arsenide resulting from irradiation with 22 and 40 MeV protons
Proton irradiation effects on minority carrier lifetime in silicon and gallium arsenide semiconductor materials
Beatty, M. E., III↗
Absorption cross sections of minor constituents in planetary atmospheres from 1050 to 2100 angstrom
Absorption cross sections of minor constituent gases in planetary atmospheres from 1050 to 2100 A
Myer, J. A.↗
Measurement of minor reactance changes with synchronized electronic oscillators
Circuitry for phase modulated synchronized electronic oscillators for measuring minor reactance changes during remote sensing
Dalins, I.↗
Vertical transport of minor constituents in the lower thermosphere by nonlinear processes of gravity waves
Lower thermosphere minor gaseous constituents vertical transport by nonlinear gravity wave process, showing density scale height decrease from diffusive equilibrium
Hodges, R. R., Jr.↗
Elemental abundances of major, minor and trace elements in Apollo 11 lunar rocks, soil and core samples
Apollo 11 lunar rocks, soil and core samples major, minor and trace elements abundance by radiochemical and instrumental activation analyses
Rey, P.↗
Minor ion diffusion in the F2-region of the ionosphere
Minor ion diffusion coefficients in F 2 region, noting Coulomb collisions role in ion density sensitivity to ionospheric fluxes
Schunk, R. W.↗
Graphite minority carriers, from transport measurements to 10 teslas
Minority carries in single crystal and pyrolytic graphite studied by observing magnetic field oscillations in Hall voltage and thermopower
Woollam, J. A.↗
A refined step-recovery technique for measuring minority carrier lifetimes and related parameters in asymmetric p-n junction diodes
Forward biased asymmetric p-n junction diodes with arbitrary impurity distributions, measuring minority carrier lifetimes by refined step recovery technique
Dean, R. H.↗
Minor elements in Apollo 11 and Apollo 12 olivine and plagioclase
Minor element concentrations and population sources of Apollo 11 and 12 olivine and plagioclase, using microprobe analyses
Smith, J. V.↗
Minor constituents in planetary atmospheres: Ultraviolet spectroscopy from the orbiting astronomical observatory
OAO data between 2000 A and 3600 A, obtained by the Wisconsin experimental package objective grating scanning spectrometer, are used to set upper limits to the abundances of many minor constituents in the atmospheres of Mars, Jupiter, Saturn, and Venus.
Owen, T.↗
Minority carriers in graphite.
Quantum oscillations as a function of magnetic field in the Hall effect and thermoelectric power are studied in two samples of pressure-annealed pyrolytic graphite. Only the oscillations originating from minority-Fermi-surface carriers are discussed. Frequencies of the de Haas-van Alphen type are measured over a wide range of angles between the magnetic field and the c axis of the Brillouin zone. Results are given graphically and analyzed.
Woollam, J. A.↗
Seasonal effects on distributions of minor neutral constituents in the mesosphere and lower thermosphere.
Calculations have been made of the diurnal variations in minor neutral constituents in the mesosphere and lower thermosphere for the condition of 60 deg latitude, summer and winter. Excited molecular oxygen has been added, and the effects of absorption of Schumann-Runge bands have been taken into account. The results show significant seasonal differences, which may be interpreted mainly in terms of the difference of penetration of solar radiation and the duration of sunlit hours. However, the comparison of the observed seasonal and diurnal variations in the airglow emissions from hydroxyl, atomic oxygen (5577 A), and excited molecular oxygen with those calculated from models suggests that effects of large-scale meridional circulation (horizontal and vertical transports) may be important in explaining these observations. It is shown that the concentration of the constituents whose main loss mechanism is recombination with atomic oxygen decreases sharply above 80 km.
Shimazaki, T.↗
Minor constituents in planetary atmospheres - Ultraviolet spectroscopy from the Orbiting Astronomical Observatory.
Orbiting Astronomical Observatory data between 2000 and 3600 A, obtained by the Wisconsin Experimental Package objective grating scanning spectrometer, are used to set upper limits to the abundances of many minor constituents in the atmospheres of Mars, Jupiter, Saturn, and Venus.
Owen, T.↗
Minor and trace elements in some meteoritic minerals.
Despite the information available (Mason, 1971) on trace elements in different types of meteorites, relatively little is known about the distribution of these elements among the individual mineral phases. The mineral phases including olivine, orthopyroxene, clinipyroxene, troilite, nickel-iron, plagioclase, chromite, and the phosphates were separated from several meteorites. The purified minerals were analyzed for trace and minor elements by spark source mass spectrometry and instrumental neutron activation analysis. The elements are classified as siderophile, lithophile, and chalcophile.
Allen, R. O., Jr.↗
High latitude minor ion enhancements: A clue for studies of magnetosphere-atmosphere coupling
Unexpectedly abrupt and pronounced distributions of the thermal molecular ions NO(+), O2(+) and N2(+) were observed at mid and high latitudes by the OGO-6 ion mass spectrometer. These minor ions may reach concentration levels exceeding 1000 ions/cu cm at altitudes as great as 1000 km, suggestive of scale heights well in excess of those inferred from low and mid-latitude measurements, under relatively undisturbed conditions. The high latitude ion enhancements were observed to be narrowly defined in time and space, with molecular ion concentrations changing by as much as an order of magnitude between successive orbits.
Taylor, H. A., Jr.↗
The design, development, and presentation of a pilot seminar called technology and opportunity: A new approach for minority business
A seminar program is reported that furthers the transfer of NASA technology to the minority community and assists in the commercial development of marketable products and manufacturing capabilities.
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