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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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Band-head wavelengths of some radicals & their ions for intepreting ultraviolet spectra of dayglow, twilight & aurorae of earth, mars & venus
Martian entry condition analyzed as nonequilibrium flow field phenomenon, noting chemical kinetics and radiation behind shock wave in gas mixtures
Absorption cross sections of electronic band systems of diatomic nitrogen, oxygen, carbon, nitrogen oxide, and carbon-nitrogen molecules at high temperatures
Experimental determination of oscillator strength of carbon-nitrogen radical violet system
Polycrystalline ammonium cyanide IR absorption spectrum as function of temperature, discussing ammonium ion hydrogen bonding to C or N atoms
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New photometric and UV spectroscopic data for the metal-deficient red giants CD -38 deg 245 and BD -18 deg 5550 are presented and discussed in light of recently noted photometric anomalies. From the IUE spectra it is aparent that the UV excess found in BD -18 deg 5550 is not the result of a hot companion. The IUE spectra, in conjunction with other observations, point to anomalous nitrogen abundances as the source of the discrepancies between the photometric and spectroscopic abundances for these stars. CD -38 deg 245 appears to be exceptionally nitrogen-rich while BD -18 deg 5550 is anomalously nitrogen-poor with respect to stars of comparable metallicities. While BD -18 deg 5550 appears to be an exception to the rule for its metallicity, the confirmation of a similar photometric pattern for CS 22885-96 may be an indication that the nitrogen overabundance in CD -38 deg 245 is typical for giants of extreme metal-deficiency.
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The National Aeronautics and Space Administration has been sponsoring efforts to develop very small planetary rovers for Mars and other planetary bodies. Recent advances in microtechnology and mobile robotics have made it feasible to create extremely small automated or remote-controlled vehicles which open new application frontiers.
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