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  • Other Sources  (2,347)
  • CHEMISTRY  (1,193)
  • GENERAL  (1,154)
  • 1970-1974  (2,347)
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  • Other Sources  (2,347)
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  • 1
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    Who owns the moon? (1974)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: It is stipulated that all of mankind owns the moon and that lunar exploration must be exclusively for peaceful purposes. In addition to the right to build stations on the moon, every country has the right to utilize the moon's natural resources. This includes: exploration, extraction, and processing of minerals and other natural resources, and their utilization and processing for local needs and possible also for export to earth.
    Keywords: GENERAL
    Type: Inhabited Space, Pt. 2 (NASA-TT-F-820); p 177-184
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  • 2
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    Quantum chemical study of the thermodynamics, kinetics of formation and bonding of H2CN - Relevance to prebiotic chemistry (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Keywords: CHEMISTRY
    Type: Journal of Molecular Evolution; 3; 3, 19; 1974
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  • 3
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    GC-MS in the analysis of organic compounds in meteorites (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The application of an analytical approach combining gas chromatography with mass spectrometry (GC-MS) has shown that the amino acid composition of meteorite extracts is quite complex. A computer was used in the evaluation of the data obtained in the investigations. The computer programs developed have been concerned solely with the mass spectra of amino acids. Specialized programs have been written to determine the number of carbon atoms in an amino acid which is a member of any of three subclasses.
    Keywords: CHEMISTRY
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  • 4
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    A flash photolysis-resonance fluorescence kinetics study of the reaction S/3P/ + OCS (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Using the technique of flash photolysis-resonance fluorescence, the reaction of ground-state atomic sulfur with carbonyl sulfide has been investigated over the temperature range from 233 to 445 K. Over this temperature range, the experimental data were fitted to an Arrhenius equation of the form k sub 1 = (1.52 plus or minus 0.20) x 10 to the minus 12th power exp(-3.63 plus or minus 0.12 kcal/mol/RT) cu cm/molecule/sec. A comparison of these results with previous investigations on this reaction system is presented.
    Keywords: CHEMISTRY
    Type: Journal of Physical Chemistry; 78; June 6
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  • 5
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    Enhanced oxidative vaporization of Cr2O3 and chromium by oxygen atoms (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Rates of oxidative vaporization of Cr2O3 have been found to be markedly enhanced in the presence of oxygen atoms. Investigations were conducted over the temperature range 200-1250 C. For Cr2O3 the enhancement was about 10 to the 9th power at 550 C in oxygen containing 2.5% atoms. Rapid oxidative vaporization of bare chromium was observed below 800 C, the rate being about one-half that of Cr2O3. Results are interpreted in terms of thermochemical analysis.
    Keywords: CHEMISTRY
    Type: Electrochemical Society; vol. 121
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  • 6
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    Sticking probabilities for the adsorption of hydrogen on clean Ni/111/, Ni/100/, Ni sheet and evaporated Ni films (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Determination of the sticking probability for hydrogen adsorption on clean Ni(111), Ni(100), polycrystalline nickel sheet, and polycrystalline evaporated nickel films, using a modification of the reflection detector technique of Horgan and King (1970) for metal films. The initial sticking probability for hydrogen adsorption on a nickel film at 300 K by the proposed method is found to be 0.25 in comparison to 0.35 for hydrogen adsorption on a nickel film using the reflection detector technique. Also, the sticking probabilities on smooth single-crystal (111) and (100) planes and polycrystalline sheets are found to be lower than those on the rougher polycrystalline nickel films.
    Keywords: CHEMISTRY
    Type: Surface Science; 41; 2, Fe; Feb. 197
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  • 7
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    Mariner Venus/Mercury '73 - A strategy of cost control (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The Mariner Venus/Mercury '73 project kept within its originally established goals for schedule, performance, and cost. Underlying this development success was the availability of the Mariner technology. But meeting the goals demanded management determination, planning, and discipline to make optimum use of state-of-the-art technology. The present work points out management approaches and techniques that kept schedules and controlled costs, the intent being to stimulate thought about how to do the same with future spacecraft and payloads.
    Keywords: GENERAL
    Type: Astronautics and Aeronautics; 12; June 197
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  • 8
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    Photo-induced free radicals on a simulated Martian surface (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Results of an electron spin resonance study of free radicals in the ultraviolet irradiation of a simulated Martian surface suggest that the ultraviolet photolysis of CO or CO2, or a mixture of both, adsorbed on silica gel at minus 170 C involves the formation of OH radicals and possibly of H atoms as the primary process, followed by the formation of CO2H radicals. It is concluded that the photochemical synthesis of organic compounds could occur on Mars if the siliceous surface dust contains enough silanol groups and/or adsorbed H2O in the form of bound water.
    Keywords: CHEMISTRY
    Type: Nature; 248; Apr. 12
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  • 9
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    Major and trace elements in the Allende meteorite (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The Allende samples analyzed include seven Ca, Al-rich aggregates, ten melilite chondrules, an olivine chondrule, and two olivine-rich aggregates. The Allende meteorite has been described as a type III carbonaceous chondrite. Major element abundances were determined with the electron microprobe technique reported by Reed and Ware (1972). An MS7 spark source mass spectrometer was used for the determination of trace element abundances.
    Keywords: CHEMISTRY
    Type: Nature; 249; May 24
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  • 10
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    Evidence for two immunologically distinct acetyl-coenzyme A synthetases in yeast (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Evidence is presented that clearly establishes the presence of two acetyl-CoA synthetases in Saccharomyces cerevisiae, one elaborated under 'aerobic' conditions, the other under 'nonaerobic' conditions. The antibody produced by each enzyme is immunologically specific.
    Keywords: CHEMISTRY
    Type: Biochimica et Biophysica Acta; 341; 1974
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  • 11
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    Thermochemical water decomposition processes (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Thermochemical processes which lead to the production of hydrogen and oxygen from water without the consumption of any other material have a number of advantages when compared to other processes such as water electrolysis. It is possible to operate a sequence of chemical steps with net work requirements equal to zero at temperatures well below the temperature required for water dissociation in a single step. Various types of procedures are discussed, giving attention to halide processes, reverse Deacon processes, iron oxide and carbon oxide processes, and metal and alkali metal processes. Economical questions are also considered.
    Keywords: CHEMISTRY
    Type: I & EC - Industrial and Engineering Chemistry; vol. 13
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  • 12
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    The determination of soil moisture by extraction and gas chromatography (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Soil moisture content was determined by extracting soil with methanol and subsequently analyzing the extract for water by gas chromatography. With air-dried mineral soils, this method gave slightly higher moisture content values than those obtained by the oven-dry method. Moisture content was determined quantitatively in soils to which various amounts of water had been added. The complete procedure, including extraction and analysis, requires less than one hour and gives results that closely compare to the oven-dry method.
    Keywords: CHEMISTRY
    Type: Soil Science; 117; 2, 19; 1974
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  • 13
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    The chemical composition of cosmic ray nuclei above 1.3 GeV per nucleus and 23 GeV per nucleus (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Measurements made with a balloon-borne counter telescope are reported. The telescope was flown from Palestine, Tex., during the fall of 1971 for a total of 10 hours under an average residual atmospheric depth of 4.4 g per sq cm. The data analysis indicates that the integral flux ratios above 1.3 GeV per nucleus and 23 GeV per nucleus are consistent with energy independence.
    Keywords: CHEMISTRY
    Type: Astrophysics and Space Science; 28; May 1974
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  • 14
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    The chemisorption of H2O, HCOOH and CH3COOH on thin amorphous films of Al2O3 (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Investigation of the irreversible chemisorption of water, formic acid and acetic acid on a thin amorphous aluminum oxide film, using inelastic tunneling spectroscopy. All of the tunnel junctions employed were Al-Al2O3-Pb junctions with the adsorbate on the Al2O3 surface between the Al2O3 and the Pb electrode. The results obtained include the finding that all Al2O3 surfaces prepared by oxidation of Al have free CH groups present on them.
    Keywords: CHEMISTRY
    Type: Surface Science; 41; 1, Ja; Jan. 197
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  • 15
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    Oxygen and hydrogen atom concentration profiles in the premixed propane/oxygen flame (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The oxygen and hydrogen free radical (atom) concentration profiles in the premixed propane/oxygen flame at 92.5% oxygen were determined using electron spin resonance (ESR) spectroscopy techniques. The ESR instrument was specially modified so that the flame can be probed for determining the oxygen and hydrogen atom population densities during the actual combustion process of propane burning in oxygen. The technique used for propane is similar to that suggested by Fristrom and Westenberg to measure the free radical concentration profiles in C-C hydrocarbon/oxygen combustion.
    Keywords: CHEMISTRY
    Type: Thermochimica Acta; 8; Apr. 197
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  • 16
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    The physical interaction of nitrogen with Pyrex, stainless steel, and nickel at very low pressure (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Keywords: CHEMISTRY
    Type: Journal of Vacuum Science and Technology; 11; Jan
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  • 17
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    Production of organic molecules by proton irradiation (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Preliminary experiments were carried out to investigate the effectiveness of proton irradiation for producing organic chromophores. The source of the 2 MeV protons used in the experiments was a model Van de Graaff accelerator. The gas cells used were hollow aluminum cylinders. The test results show that energetic protons can be an effective energy source for the formation of complex molecules from simple ones. With the exception of sulfide compounds none of the molecules that were identified are colored. However, coloring agents could be contained in unresolvable fractions.
    Keywords: CHEMISTRY
    Type: Nature; 247; Jan. 11
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  • 18
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    Internal pressures and molecular dimensions in aqueous solutions of some chlorides (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: On the basis of measurements of the velocity of ultrasounds in aqueous solutions of some alkaline-earth chlorides (MgCl2, CaCl2, BaCl2) the concentration and temperature dependences of the internal pressure were determined. Using these results, as well as surface tension measurements, the mean diameters of the molecular species as a function of concentration and temperature, were determined.
    Keywords: CHEMISTRY
    Type: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 172-176
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  • 19
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    Checking the statistical theory of liquids by ultraacoustic measurements (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The manner of theoretically obtaining radial distribution functions 9(r) for n-hexane as a function of temperature is described. With the aid of function g(r) the coefficient of dynamic viscosity and the coefficient of volumetric viscosity for temperatures ranging from 213 K to 273 K were calculated. With the aid of the two coefficients of viscosity the coefficient of absorption of ultrasounds in n-hexane referred to the square of the frequency was determined. The same values were measured experimentally. Comparison of theory with experiments resulted in satisfactory agreement.
    Keywords: CHEMISTRY
    Type: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 166-171
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  • 20
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    Molecular compressibility of some halides in alcohols (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: After measuring ultrasonic velocity and density, the molecular compressibility values from Wada's formula were calculated, for alkali metal halide solutions in methyl, ethyl, butyl, and glycol alcohol. The temperature and concentration dependence were studied, finding deviations due to the hydrogen bonds of the solvent.
    Keywords: CHEMISTRY
    Type: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 158-161
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  • 21
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    Specialist conference: Propellant pressing (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Keywords: GENERAL
    Type: APL Bull. of the 20th Interagency Solid Propulsion Meeting, Vol. 4; p 427-437
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  • 22
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    Detection of dilute organic acids in water by inelastic tunneling spectroscopy (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Study of inelastic electron tunneling spectroscopy (IETS) spectra obtained from junctions exposed to dilute solutions of organic molecules in both liquid and vapor phases. The results indicate that it is possible in principle to detect the presence and to measure the concentration of at least some organic molecules in dilute aqueous solution by means of the IETS technique. Some fine points pertaining to the application of this technique are discussed, and it is pointed out that through appropriate refinements IETS may become a valuable tool for analytical water chemistry.
    Keywords: CHEMISTRY
    Type: Surface Science; 43; 2, Ju; June 197
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  • 23
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    Studies of aircraft wake chemistry and dispersion (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Use of aerospace technology to study aircraft wakes is reviewed. It is shown how aerospace vehicles can be used to provide data for increased understanding of the atmosphere and of aircraft exhaust trails where knowledge is inadequate to evaluate fully the potential impact of the engine emissions. Models of aircraft near-field exhaust wakes are characterized by jet, vortex, and dispersion regimes. Wake growth in the jet regime is self-determined and rapid, whereas further spreading is inhibited in the vortex regime because of circulating vortex motion. Wake diffusion in the dispersion regime is initially influenced by aircraft induced turbulence but is dominated later by small-scale atmospheric turbulence. Computed fluid mechanical results show the importance of effects such as wake buoyancy, wind shear, turbulence, and traffic corridor exhaust buildup on dispersion of the wake. In the jet regime the exhaust characteristics and thermochemistry serve to illustrate initial chemical changes involving potential pollutant species.
    Keywords: CHEMISTRY
    Type: Acta Astronautica; 1; Jan
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  • 24
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    Multitopic load chart for the design office subdivison (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The methods of development, designation and application of the charts under multitopic conditions are considered.
    Keywords: GENERAL
    Type: Technol. for the Production of Space Equipment (NASA-TT-F-15766); p 15-20
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  • 25
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    Organization of operations with respect to checking drawings (drawing checking procedure) (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: One of the basic conditions of high quality manufacture of instruments is the error free developed design documentation. A procedure is described for organizing the design check of the drawings.
    Keywords: GENERAL
    Type: Technol. for the Production of Space Equipment (NASA-TT-F-15766); p 21-24
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  • 26
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    PERT simulation of experimental design work (1974)
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    Publication Date: 2011-08-16
    Description: The basic principles of constructing the models and rules for their application in the development of PERT charts are discussed.
    Keywords: GENERAL
    Type: Technol. for the Production of Space Equipment (NASA-TT-F-15766); p 11-14
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  • 27
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    Characteristic features of determining the labor input and estimated cost of the development and manufacture of equipment (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The difficulties in obtaining exact calculation data for the labor input and estimated cost are noted. The method of calculating the labor cost of the design work using the provisional normative indexes with respect to individual forms of operations is proposed. Values of certain coefficients recommended for use in the practical calculations of the labor input for the development of new scientific equipment for space research are presented.
    Keywords: GENERAL
    Type: Technol. for the Production of Space Equipment (NASA-TT-F-15766); p 3-10
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  • 28
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    Government-Industry Data Exchange Program (GIDEP) (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The Government-Industry Data Exchange Program (GIDEP) was originated in 1959 by the Army, Navy, and Air Force Ballistic Missile Agencies. Known at that time as IDEP--Interservice Data Exchange Program--its intent was to eliminate duplicate testing of parts and components by disseminating pertinent test data among Department of Defense contractors and various government agencies. In 1966 both the National Aeronautics and Space Administration and the Canadian Military Electronics Standards Agency (CAMESA) recognized the value of the data provided by the program and became participants. Today, GIDEP provides the interchange of specialized technical data to all the military services, participating government contractors and numerous government agencies such as the Atomic Energy Commission, Federal Aviation Administration, Defense Supply Agency, and the Small Business Administration.
    Keywords: GENERAL
    Type: NBS The Role of Cavitation in Mech. Failures; p 166-170
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  • 29
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    Ultrasonic filtration of industrial chemical solutions (1974)
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    Publication Date: 2011-08-16
    Description: The practical results obtained as a result of filtering industrial chemical solutions under continuous flow conditions with the aid of an ultrasonic filter are presented. The main part of the assembly consists of an ultrasonic generator with an output power of about 400 W and the filtration assembly, in which there is a magnetostrictive amplifier constructed for 20.5 kHz. In addition to ensuring a continuous flow of filtered solution, ultrasonic filters can be replaced or cleaned at intervals of time that are 8-10 times greater than in the case of mechanical filters. They yield considerably better results as far as the size of the filtered particles is concerned. The parameters on which filtration quality depends are also presented.
    Keywords: CHEMISTRY
    Type: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-156631); p 153-157
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  • 30
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    Effects of ultrasonic fields in the phosphoric acid process (1974)
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    Publication Date: 2011-08-16
    Description: A process of apatite decomposition with sulfuric acid was studied under the influence of ultrasound in the phosphoric acid production process. The studies were carried out with and without ultrasonic fields in the reaction mixture, which resembled the mixing ratio used in technical production processes. Ultrasound with a frequency of 20 kHz and an intensity of 1 W/sq cm was used in the studies. A very favorable ultrasonic effect upon the degree of apatite decomposition was observed. The ultrasonic field affects the shape of byproduct gypsum crystals. In the H3PO4 production process without ultrasound, the byproduct gypsum crystallizes as long, thin needles which cause problems in filtration. In the trials involving the application of wound, gypsum crystallized in the form of small platelets possessing a favorable ratio of length to width.
    Keywords: CHEMISTRY
    Type: The 4th Natl. Conf. on acoustics, Vol. 2, B (NASA-TT-F-15663); p 148-152
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  • 31
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    Acoustic properties of organic acid mixtures in water (1974)
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    Publication Date: 2011-08-16
    Description: The variation of the rate of propagation of ultrasounds in organic acid mixtures in water points to structural changes caused by interactions that take place under conditions of thermal agitation, at different acid concentrations. At the same time, a difference is found in the changes in velocity as a function of the length of the carbon chain of the acids in the mixture as a result of their effect on the groups of water molecules associated by hydrogen bonds.
    Keywords: CHEMISTRY
    Type: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 183-188
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  • 32
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    Application of describing functions for evaluation of space shuttle landing aid display concepts (1974)
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    Publication Date: 2011-08-16
    Keywords: GENERAL
    Type: AF Inst. of Technol. Proc. of the 10th Ann. Conf. on Manual Control; p 677-703
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  • 33
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    Future terminal air traffic management concepts (1974)
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    Publication Date: 2011-08-16
    Keywords: GENERAL
    Type: AF Inst. of Technol. Proc. of the 10th Ann. Conf. on Manual Control; p 477-501
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  • 34
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    Simulator evaluation of three situation and guidance displays for V/STOL zero-zero landings (1974)
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    Publication Date: 2011-08-16
    Keywords: GENERAL
    Type: AF Inst. of Technol. Proc. of the 10th Ann. Conf. on Manual Control; p 439-465
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  • 35
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    Decision behavior with changing signal strength (1974)
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    Publication Date: 2011-08-16
    Keywords: GENERAL
    Type: AF Inst. of Technol. Proc. of the 10th Ann. Conf. on Manual Control; p 1-38
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  • 36
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    An evaluation of a predictor used with two different aircraft map display orientations (1974)
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    Publication Date: 2011-08-16
    Keywords: GENERAL
    Type: AF Inst. of Technol. Proc. of the 10th Ann. Conf. on Manual Control; p 397-426
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  • 37
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    Digitally controlled transient waveform testing: Alternative method to slow sine sweep (1974)
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    Publication Date: 2011-08-16
    Keywords: GENERAL
    Type: Shock and Vibration Inform. Center The Shock and Vibration Bull. No. 44, Part 3; p 1-5
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  • 38
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    Gas chromatographic separation of water from cryogenically collected air samples - Enhanced concentration of trace organic volatiles prior to GC-MS analyses (1974)
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    Publication Date: 2011-08-16
    Keywords: CHEMISTRY
    Type: Analytical Chemistry; 46; Apr. 197
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  • 39
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    Natural evidence for chemical and early biological evolution (1974)
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    Publication Date: 2011-08-16
    Description: Oparin (1924) and Haldane (1929) have independently hypothesized that life arose under reducing conditions through an evolutionary sequence of events involving increasingly complex organic substances. The natural evidence for this hypothesis of chemical evolution is considered, giving particular attention to tangible samples which have been chemically analyzed in earth-bound laboratories. It is found that meteorites provide naturally occurring evidence in support of chemical evolution, but not of biological evolution. Studies on the early Precambrian Swaziland Sequence and the Bulawayan System of southern Africa provide evidence for very early biological evolution.
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  • 40
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    Oxidative vaporization kinetics of Cr2O3 in oxygen from 1000 to 1300 C (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Rates of oxidative vaporization of Cr2O3 on preoxidized resistively heated chromium were determined in flowing oxygen at a pressure of 0.115 Torr for temperatures from 1000 to 1300 C. Reaction controlled rates were obtained from experimental rates by a gold calibration technique, and these rates were shown to agree with those predicted by thermochemical analysis. The activation energy obtained for the oxidative vaporization reaction corresponded numerically with the thermochemical enthalpy of the reaction. A theoretical equation is given for calculating the rate from thermodynamic data using boundary-layer theory.
    Keywords: CHEMISTRY
    Type: Electrochemical Society; vol. 121
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  • 41
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    Ultrasonic velocity and adiabatic compressibility in dioxane-water mixtures (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Using a method of diffraction of light on an ultrasonic beam, the velocity of ultrasounds and the adiabatic compressibility in dioxane-water mixtures were determined. The dependence of these quantities on the temperature (in the 15-50 C range) and on the concentration (0-100%) were studied. For each temperature there was found a velocity maximum and a compressibility minimum for a given value of the dioxane concentration. The different behavior of these mixtures is due to intense interactions between the molecules of the two liquids composing the mixture.
    Keywords: CHEMISTRY
    Type: the 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 189-193
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  • 42
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    The lower ionosphere of Venus (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Galactic cosmic ray bombardment provides a permanent background ionosphere in planetary atmospheres. A transport technique is used to compute the cosmic ray ionization rate profile in a model of the Venusian atmosphere at altitudes between 55 and 100 km. These ionization rates are then applied to a model of ion chemistry to predict equilibrium electron and ion density profiles. Ionization rates for typical solar flare proton events are available from earlier calculations and have been included.
    Keywords: CHEMISTRY
    Type: Planetary and Space Science; 22; Apr. 197
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  • 43
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    Approximate spin projection of three-component UHF wavefunctions - The states of the pentachlorocyclopentadienyl cation and the croconate dianion, C5O5/2-/ (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The approximate spin projection method of Amos et al. is extended to handle UHF wave functions having three significant components of differing multiplicity. An expression is given for the energy after single annihilation which differs from that of Amos and Hall. The new expression reproduces the results obtained from a previous exact calculation for which the weights and energies of the components are known. The extended approximate projection method is applied to the pi-electron UHF wave functions for the ground states of the pentachlorocyclopentadienyl cation and the croconate dianion, C5O5(2-). The results indicate a triplet ground state for the former and a singlet ground state for the latter, in agreement with experimental ESR susceptibility measurements for these molecular ions. C5C15(-) cannont be treated by restricted Hartree-Fock theory, due to its open-shell ground state. Incorrect results are obtained for the croconate dianion, if restricted Hartree-Fock theory and singly excited configuration interactions are utilized.
    Keywords: CHEMISTRY
    Type: Journal of Chemical Physics; 60; Feb. 15
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  • 44
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    Thin-layer assay of chlorophyll and analogous dry-column separation with effluent fluorometry (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Keywords: CHEMISTRY
    Type: Journal of Chromatography; 88; 1974
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  • 45
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    Restudy of pyroxene-pyroxene equilibration temperature for ordinary chondrite meteorites (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Experimental verification of the conclusions of Van Schmus and Koffman (1967) that the equilibration temperatures of ordinary chondrites are roughly the same regardless of classification, and that these temperatures range from 770 to 860 C. The higher average relative equilibrium temperatures found are attributed to improvements in microprobe techniques, and better standards and correction procedures introduced over the last six years. Agreement is expressed with their conclusion that ordinary chondrites embody equilibria achieved within the metamorphic temperature regime and not under igneous temperatures as postulated earlier by Craig (1964) and Mueller (1964).
    Keywords: CHEMISTRY
    Type: Contributions to Mineralogy and Petrology; 43; 1974
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  • 46
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    Identification and dissociation energy of gaseous hafnium mononitride (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Keywords: CHEMISTRY
    Type: Journal of Physical Chemistry; 78; Jan. 31
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  • 47
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    Determining an optimal set of research experiments (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Description of a procedure for optimal selection of research experiments to be performed aboard the Space Shuttle. The procedure is designed to provide the study team with a credible approach to their task. The procedure is characterized as methodologically sound and based on assumptions which reasonably approximate the real conditions. The data-gathering techniques proposed are accepted by scientifically trained personnel.
    Keywords: GENERAL
    Type: IEEE Transactions on Engineering Management; EM-21; Feb. 197
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  • 48
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    Teleoperator equations of motion (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Keywords: GENERAL
    Type: NASA-CR-150043 , SR-S-30
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  • 49
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    Quantitation and detection of vanadium in biologic and pollution materials (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A review is presented of special considerations and methodology for determining vanadium in biological and air pollution materials. In addition to descriptions of specific analysis procedures, general sections are included on quantitation of analysis procedures, sample preparation, blanks, and methods of detection of vanadium. Most of the information presented is applicable to the determination of other trace elements in addition to vanadium.
    Keywords: CHEMISTRY
    Type: NASA-TM-X-71497 , E-7853
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  • 50
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    Modification of one man life raft (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: A one man inflatable life raft is described. The raft has an inflatable tube perimetrically bounding the occupant receiving space with a flexible floor member. A zippered opening in the floor allows entry and facilitates the use of a constant diameter tube. An airtight fabric bulkhead divides the peripheral tube longitudinally into inflatable tube sections, where if either tube section were punctured, the bulkhead would move into the punctured section to substitute for the punctured wall portion and maintain the inflatable volume of the tube. The floor member is attached to the central portion of the tube wall so that either side of the raft can be the up side.
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  • 51
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    Method of making rolling element bearings (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: A method is described of making rolling elements by forming low mass cores having either hollow centers or being of a low mass material. The low mass cores are plated and heat treated to provide hard surfaces on the rolling elements. After grinding to the proper diameter the rolling elements are assembled between races to form a hearing.
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  • 52
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    Temperature compensated digital inertial sensor (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: A circuit which maintains the inertial element of a gyroscope or accelerometer at a constant position by delivering pulses to a rebalancing motor is discussed. The circuit compensates for temperature changes by using a temperature sensor that varies the threshold of inertial element movement required to generate a rebalance pulse which reacts to changes in viscosity of the flotation fluid. The output of the temperature sensor also varies the output level of the current source to compensate for changes in the strength of the magnets of the rebalancing motor. The sensor also provides a small signal to the rebalance motor to provide a temperature dependent compensation for fixed drift or fixed bias.
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  • 53
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    A guide for performing system safety analysis (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: A general guide is presented for performing system safety analyses of hardware, software, operations and human elements of an aerospace program. The guide describes a progression of activities that can be effectively applied to identify hazards to personnel and equipment during all periods of system development. The general process of performing safety analyses is described; setting forth in a logical order the information and data requirements, the analytical steps, and the results. These analyses are the technical basis of a system safety program. Although the guidance established by this document cannot replace human experience and judgement, it does provide a methodical approach to the identification of hazards and evaluation of risks to the system.
    Keywords: GENERAL
    Type: NASA-TM-X-64799
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  • 54
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    Adaptive voting computer system (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: A computer system is reported that uses adaptive voting to tolerate failures and operates in a fail-operational, fail-safe manner. Each of four computers is individually connected to one of four external input/output (I/O) busses which interface with external subsystems. Each computer is connected to receive input data and commands from the other three computers and to furnish output data commands to the other three computers. An adaptive control apparatus including a voter-comparator-switch (VCS) is provided for each computer to receive signals from each of the computers and permits adaptive voting among the computers to permit the fail-operational, fail-safe operation.
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  • 55
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    Developable images produced by X-rays using the nickel-hypophosphite system. 3: The latent image and trapped hydrogen (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: The hydrogen trapped in X-irradiated hypophosphites, phosphites, formates, oxalates, a phosphate, and some organic compounds was vacuum extracted and measured quantitatively with a mass spectrometer. After extraction, normally developable salts were found to be still developable. Thus, the latent image is not the trapped hydrogen but a species of the type HPO(-)2. The amplification factor for irradiated hypophosphites is about 100. A narrow range of wavelengths (at about 0.07 nm, 0.7 A) is responsible for the formation of the latent image.
    Keywords: CHEMISTRY
    Type: NASA-TN-D-7412 , E-7502
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  • 56
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    Trapping of hydrogen atoms in X-irradiated salts at room temperature and the decay kinetics (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: The salts (hypophosphites, formates, a phosphite, a phosphate, and an oxalate) were X-irradiated, whereby hydrogen formed chemically by a radiolytic process becomes trapped in the solid. By room temperature vacuum extraction, the kinetics for the evolution of this trapped hydrogen was studied mass spectrometrically. All salts except two exhibited second-order kinetics. The two exceptions (NaH2PO2(H2O) and K2HPO4) showed first-order kinetics. Based on experimental results, the escape of hydrogen involves three steps: the diffusion of hydrogen atoms from the bulk to the surface, association of these atoms on the surface (rate controlling step for second-order hydrogen evolution), and the desorption of molecular hydrogen from the surface. The hydrogen does not escape if the irradiated salt is stored in air, apparently because adsorbed air molecules occupy surface sites required in the escape mechanism.
    Keywords: CHEMISTRY
    Type: NASA-TN-D-7413 , E-7540
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  • 57
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    An overview of the National Space Science data Center Standard Information Retrieval System (SIRS) (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: A general overview is given of the National Space Science Data Center (NSSDC) Standard Information Retrieval System. A description, in general terms, the information system that contains the data files and the software system that processes and manipulates the files maintained at the Data Center. Emphasis is placed on providing users with an overview of the capabilities and uses of the NSSDC Standard Information Retrieval System (SIRS). Examples given are taken from the files at the Data Center. Detailed information about NSSDC data files is documented in a set of File Users Guides, with one user's guide prepared for each file processed by SIRS. Detailed information about SIRS is presented in the SIRS Users Guide.
    Keywords: GENERAL
    Type: NASA-TM-X-69903 , NSSDC-74-09
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  • 58
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    Comparative evaluation of solar, fission, fusion, and fossil energy resources, part 3 (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: The role of nuclear fission reactors in becoming an important power source in the world is discussed. The supply of fissile nuclear fuel will be severely depleted by the year 2000. With breeder reactors the world supply of uranium could last thousands of years. However, breeder reactors have problems of a large radioactive inventory and an accident potential which could present an unacceptable hazard. Although breeder reactors afford a possible solution to the energy shortage, their ultimate role will depend on demonstrated safety and acceptable risks and environmental effects. Fusion power would also be a long range, essentially permanent, solution to the world's energy problem. Fusion appears to compare favorably with breeders in safety and environmental effects. Research comparing a controlled fusion reactor with the breeder reactor in solving our long range energy needs is discussed.
    Keywords: GENERAL
    Type: NASA-CR-138117
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  • 59
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    Publications of the Jet Propulsion Laboratory, January - December 1973 (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: Five classes of publications are included in this bibliography: (1) Technical Reports in which the information is complete for a specific accomplishment and is intended for a wide audience. (2) Articles from the bimonthly Deep Space Network Progress Report. Each volume's collection of articles presents a periodical survey of current accomplishments by the Deep Space Network. (3) Technical Memorandums, in which the information is complete for a specific accomplishment but is intended for a limited audience to satisfy unique requirements. (4) Articles from the JPL Quarterly Technical Review. Each article summarizes a recent important development, interim or final results, or an advancement in the state of the art in a scientific or engineering endeavor, This publication has been discontinued, and the issues indexed in this bibliography are the last to be published. (5) Articles published in the open literature. The publications are indexed by: (1) author, (2) subject, and (3) publication type and number. A descriptive entry appears under the name of each author of each publication; an abstract is included with the entry for the primary (first-listed) author.
    Keywords: GENERAL
    Type: NASA-CR-138171 , JPL-BIBL-39-15
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  • 60
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    NSSDC and WDC-A-R and S document availability and distribution services (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: The documents available from the National Space Science Data Center and the World Data Center A for Rockets and Satellites are described. The availability, costs, ordering procedures for documents presently available, and the procedures for obtaining future documents are given.
    Keywords: GENERAL
    Type: NASA-TM-X-69904 , NSSDC/WDC-A-R/S-74-10
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  • 61
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    Comparative evaluation of solar, fission, fusion, and fossil energy resources. Part 5: Conclusions and recomendations (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: Air pollution resulting from the use of fossil fuels is discussed. Phenomena relating to the emission of CO2 such as the greenhouse effect and multiplier effect are explored. Particulate release is also discussed. The following recommendations are made for the elimination of fossil fuel combustion products in the United States: development of nuclear breeder reactors, use of solar energy systems, exploration of energy alternatives such as geothermal and fusion, and the substitution of coal for gas and oil use.
    Keywords: GENERAL
    Type: NASA-CR-138183
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    Comparative evaluation of solar, fission, fusion, and fossil energy resources. Part 4: Energy from fossil fuels (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: The conversion of fossil-fired power plants now burning oil or gas to burn coal is discussed along with the relaxation of air quality standards and the development of coal gasification processes to insure a continued supply of gas from coal. The location of oil fields, refining areas, natural gas fields, and pipelines in the U.S. is shown. The technologies of modern fossil-fired boilers and gas turbines are defined along with the new technologies of fluid-bed boilers and MHD generators.
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    Type: NASA-CR-138188
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  • 63
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    Skylab-2 handheld photography alphabetized geographical features list (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: This publication represents a relisting of the Skylab-2, PTD Handheld Photography Catalog. The purpose of this publication is to provide imagery researchers a supplement to the PTD Catalog by alphabetically sorting together all similar major and minor features. Some cross-referencing of feature names was accomplished where the authors deemed necessary; however, no attempt was made to exhaust all possible means of cross-referencing. An example of the cross-referencing which was done: Kuril Islands may be found under the major feature column and also as a minor feature of Islands.
    Keywords: GENERAL
    Type: NASA-CR-134245 , LEC-2059
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  • 64
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    Dispensing targets for ion beam particle generators (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: A target for dispensing high energy protons or neutrons or ionized atoms or ionized molecules is provided which comprises a container for the target gas, which is at atmospheric or higher pressure. The container material can release the target gas in the spot where the container is heated above a predetermined temperature by the impact of an ion beam where protons or neutrons are desired, or by electrons where ionized atoms or molecules are desired. On the outside of the container, except for the region where the beam is to impact, there is deposited a layer of a metal which is imperious to gaseous diffusion. A further protective coating of a material is placed over the layer of metal, except at the region of the ion impact area in order to adsorb any unreacted gas in the vacuum in which the target is placed, to thereby prevent reduction of the high vacuum, as well as contamination of the interior of the vacuum chamber.
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  • 65
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    Method and apparatus for optically monitoring the angular position of a rotating mirror (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: An optical system monitors the angular position of a rotating scanning mirror to indicate the effective start and end of each scan. At a certain angular position, a ray of energy transmitted to the mirror is reflected a plurality of times between the reflectors associated with the optical system and the line on the mirror parallel to the axis, and then to a detector to sense that angular position. A single optical system may be arranged to sense a plurality of different angular positions for each revolution of the mirror.
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  • 66
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    Trends in State and Federal land use law relating to inventories, monitoring and evaluation (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: A description and analysis of selected State and Federal laws relating to land use inventories, monitoring, and evaluation is presented. Legal requirements and information systems for land use in the following states are reviewed: Colorado, Delaware, Florida, Hawaii, Indiana, Kansas, Maine, Mississippi, Missouri, Oklahoma, Pennsylvania, Tennessee, Utah, Vermont, and West Virginia.
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    Type: NASA-CR-137332
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  • 67
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    Airline return-on-investment model for technology evaluation (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: This report presents the derivation, description, and operating instructions for a computer program (TEKVAL) which measures the economic value of advanced technology features applied to long range commercial passenger aircraft. The program consists of three modules; and airplane sizing routine, a direct operating cost routine, and an airline return-on-investment routine. These modules are linked such that they may be operated sequentially or individually, with one routine generating the input for the next or with the option of externally specifying the input for either of the economic routines. A very simple airplane sizing technique was previously developed, based on the Brequet range equation. For this program, that sizing technique has been greatly expanded and combined with the formerly separate DOC and ROI programs to produce TEKVAL.
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    Type: NASA-CR-132382
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  • 68
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    High speed shutter (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: A shutter element is described which is formed by a loop of an electrically conductive ribbon disposed adjacent to the end of a passageway to be shuttered. The shuttered end of the passageway is cut at an acute angle. The two leg portions of the ribbon loop are closely spaced to each other and disposed in a plane parallel to the axis of the passageway. A pulse of high current is switched through the loop to cause the current flowing in opposite directions through adjacent leg portions of the ribbon. This produces a magnetically induced pressure on one of the legs of the ribbon forcing the leg over the end of the passageway in gas tight sealing engagement, and thereby blocking passageway.
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  • 69
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    Heat transfer device (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: A heat transfer device is characterized by an hermetically sealed tubular housing including a tubular shell terminating in spaced end plates, and a tubular mesh wick concentrically arranged and operatively supported within said housing. The invention provides an improved wicking restraint formed as an elongated and radially expanded tubular helix concentrically related to the wick and adapted to be axially foreshortened and radially expanded into engagement with the wick in response to an axially applied compressive load. The wick is continuously supported in a contiguous relationship with the internal surfaces of the shell.
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  • 70
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    Reinforced polyquinoxaline gasket and method of preparing the same (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: A gasket or seal resistant to ionizing radiation and liquid hydrogen temperatures is made up of a laminated polyquinoxaline resin-fiberglass cloth body portion and a molded polyquinoxaline encapsulating film. The laminated body is prepared by stacking thin sheets of the resin alternately with fiberglass cloth and heating the assembly under pressure with the temperature, pressure and resin film thickness being controlled so that only partial impregnation of the fiberglass cloth is produced. The encapsulating resin film is preheated at about 300 f and applied to the laminate body by molding at a temperature of about 625 F. The molded gasket is then deflashed and post-cured by heating at 675 to 700 F.
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  • 71
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    High field CdS detector for infrared radiation (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: An infrared radiation detector including a cadmium sulfide platelet having a cathode formed on one of its ends and an anode formed on its other end is presented. The platelet is suitably doped such that stationary high-field domains are formed adjacent the cathode when based in the negative differential conductivity region. A negative potential is applied to the cathode such that a high-field domain is formed adjacent to the cathode. A potential measuring probe is located between the cathode and the anode at the edge of the high-field domain and means are provided for measuring the potential at the probe whereby this measurement is indicative of the infrared radiation striking the platelet.
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  • 72
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    Apparatus for remote handling of materials (1974)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: Apparatus for remote handling of materials are described. A closed housing is provided with first and second containers and first and second reservoirs for holding materials to be mixed. The materials are transferable from the reservoirs to the first container where they are mixed. The mixed materials are then conveyed from the first container to the second container preferably by dumping the mixed materials into a funnel positioned over the second container. The second container is then moved to a second position for analysis of the mixed materials. For example, the materials may be ignited and the flame analyzed. Access, such as a sight port, is provided in the housing at the analysis position. The device provides a simple and inexpensive apparatus for safely mixing a pyrophoric material and an oxidizer which together form a thermite type mixture that burns to produce a large quantity of heat and light.
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  • 73
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    Inverter ratio failure detector (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A failure detector which detects the failure of a dc to ac inverter is disclosed. The inverter under failureless conditions is characterized by a known linear relationship of its input and output voltages and by a known linear relationship of its input and output currents. The detector includes circuitry which is responsive to the detector's input and output voltages and which provides a failure-indicating signal only when the monitored output voltage is less by a selected factor, than the expected output voltage for the monitored input voltage, based on the known voltages' relationship. Similarly, the detector includes circuitry which is responsive to the input and output currents and provides a failure-indicating signal only when the input current exceeds by a selected factor the expected input current for the monitored output current based on the known currents' relationship.
    Keywords: GENERAL
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  • 74
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    A contemporary view of systems engineering (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The concept of a 'system' is defined, and the 'systems approach' is discussed. Four contemporary examples of the systems approach are presented: an operations research project, the planning-programming-budgeting system, an information processing system, and aerospace programs.
    Keywords: GENERAL
    Type: NASA-CR-136833 , JPL-TM-33-667
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  • 75
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    Multifunction audio digitizer (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An illustrative embodiment of the invention includes apparatus which simultaneously produces both direct delta modulation and pulse code modulation. An input signal, after amplification, is supplied to a window comparator which supplies a polarity control signal to gate the output of a clock to the appropriate input of a binary up-down counter. The control signals provide direct delta modulation while the up-down counter output provides pulse code modulation.
    Keywords: GENERAL
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  • 76
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    Diffusion welding in air (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Solid state welding a butt joint by fusion welding the peripheral surfaces to form a seal is described along with, autogenetically cleaning the faying or mating surfaces of the joint by heating the abutting surfaces to 1,200 C and heating to the diffusion welding temperature in air.
    Keywords: GENERAL
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  • 77
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    Automatic real-time pair-feeding system for animals (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A pair feeding method and apparatus are provided for experimental animals wherein the amount of food consumed is immediately delivered to a normal or control animal so that there is a qualitative, quantitative and chronological correctness in the pair feeding of the two animals. This feeding mechanism delivers precisely measured amounts of food to a feeder. Circuitry is provided between master and slave feeders so that there is virtually no chance of a malfunction of the feeding apparatus, causing erratic results. Recording equipment is also provided so that an hourly record is kept of food delivery.
    Keywords: GENERAL
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  • 78
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    Dual measurement ablation sensor (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A dual measurement ablation sensor for measuring both char-interface and surface recession at a point in an ablating material is described. The sensor permits measurement of the thickness of the char layer. Char-interface recession is indicated by a drop in the resistance to a current passed through the ablation material. Surface recession is indicated by the closing of an electrical circuit when melting causes the release of a spring switch.
    Keywords: GENERAL
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  • 79
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    Photoionization and ion cyclotron resonance studies of the reaction of vibrationally excited C2H2/+/ ions with H2 (1974)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Keywords: CHEMISTRY
    Type: Journal of Chemical Physics; 61; Sept. 1
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  • 80
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    ICR study of nonreactive ion-molecule collision rate constants for Cl/-/ and Cr/CO/5/-/ (1974)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Determination of experimental momentum transfer rate constants for systems of Cl(-) and Cr(CO)5(-) ions by means of an ion cyclotron resonance (ICR) line-broadening technique. It is found that in the pure polarization limit of small ion/large neutral collisions the Langevin ion mobility theory gives good agreement with experimental results. A comparison of isotropic and anisotropic neutral systems suggests that a correction for the anisotropic systems is necessary. Beyond the pure polarization limit the Langevin theory gives poor predictions for ion mobilities. The adjustable parameter, gamma, of the Mason-Schamp (12-6-4) potential function permits unique solution of the ion mobility for Cr(CO)5(-) in a wide range of neutral gases. The large values of gamma obtained for most of these systems imply, in terms of the Mason-Schamp theory, that the r to the minus 6th power contribution to the potential function is significant.
    Keywords: CHEMISTRY
    Type: Journal of Chemical Physics; 61; July 1
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  • 81
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    Three-dimensional tertiary structure of yeast phenylalanine transfer RNA (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Results of an analysis and interpretation of a 3-A electron density map of yeast phenylalanine transfer RNA. Some earlier detailed assignments of nucleotide residues to electron density peaks are found to be in error, even though the overall tracing of the backbone conformation of yeast phenylalanine transfer RNA was generally correct. A new, more comprehensive interpretation is made which makes it possible to define the tertiary interactions in the molecule. The new interpretation makes it possible to visualize a number of tertiary interactions which not only explain the structural role of most of the bases which are constant in transfer RNAs, but also makes it possible to understand in a direct and simple fashion the chemical modification data on transfer RNA. In addition, this pattern of tertiary interactions provides a basis for understanding the general three-dimensional folding of all transfer RNA molecules.
    Keywords: CHEMISTRY
    Type: Science; 185; Aug. 2
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  • 82
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    Drift mobility of holes in phenanthrene single crystals (1974)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: The temperature dependence of drift mobilities of holes in single crystals of phenanthrene was measured in the range from 203 to 353 K in three crystallographic directions. Below the anomaly temperature of 72 C, the mobility temperature dependences are consistent with the Munn and Siebrand slow-phonon hopping process in the b direction and the Munn and Siebrand slow-phonon coherent mode in the a and c prime directions. The drift mobility temperature dependences in crystals that have been cooled through the anomaly temperature in the presence of illumination and an electric field are consistent with the model of Spielberg et al. (1971), in which the hindered vibration of the 4,5 hydrogens introduces a new degree of freedom above 72 C.
    Keywords: CHEMISTRY
    Type: Journal of Chemical Physics; 60; Feb. 15
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  • 83
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    Direct synthesis of polypeptides - Polycondensation of alpha-amino acids by polymetaphosphate esters (1974)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Keywords: CHEMISTRY
    Type: Journal of Molecular Evolution; 3; 1, 19; 1974
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  • 84
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    On the asymmetric polymerization of aspartic acid enantiomers by Kaolin (1974)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Keywords: CHEMISTRY
    Type: Journal of Molecular Evolution; 3; 1, 19; 1974
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  • 85
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    The mechanism of the H2O-catalyzed chain photodecomposition of O3 and the reaction of HO with O3 (1974)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Keywords: CHEMISTRY
    Type: Journal of Photochemistry; 2; 1973-197
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  • 86
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    Center for development technology and program in technology and human affairs (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The role of technology in nontraditional higher education with particular emphasis on technology-based networks is analyzed nontraditional programs, institutions, and consortia are briefly reviewed. Nontraditional programs which utilize technology are studied. Technology-based networks are surveyed and analyzed with regard to kinds of students, learning locations, technology utilization, interinstitutional relationships, cost aspects, problems, and future outlook.
    Keywords: GENERAL
    Type: NASA-CR-140016 , R(T)-74/3 , THA-74/5
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  • 87
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    Hydrocarbons identified in extracts from estuarine water accommodated no. 2 fuel oil by gas chromatography-mass spectrometry (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Results are presented on a computerized gas chromatograph-mass spectrometer analysis of methylene chloride and n-heptane extracts of a No. 2 fuel oil accommodated estuarine water sample. The analytical method is briefly described, and the limitations on the identifications are categorized. Some attempt was made to determine major and trace constituents in the water accommodate. Altogether 66 hydrocarbon compounds were identified specifically, and 75 compounds were partially identified. Seven compounds could be recognized as major constituents of the water accommodated oil and ten were present only as traces. The aromatic compounds found were alkyl benzenes, naphthalene, tetralin, indane, biphenyl, fluorene, anthracene, and some of their alkyl substituted isomers in the range of carbon numbers C7 to C15. Four n-alkanes, C10 to C13, were found along with four other assorted hydrocarbons.
    Keywords: CHEMISTRY
    Type: NASA-TM-X-72009
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  • 88
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    Interaction of gases with lunar materials (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Quantitative efforts to assess the surface properties of lunar fines, particularly water induced porosity are discussed. Data show that: (1) changes induced in lunar fines are not visible in high energy electron micrographs, (2) scanning micrographs show no change in particle size distribution as a result of reaction with water, (3) water induced changes are internal to the particles themselves, (4) normal laboratory atmosphere blocks alteration reaction with water, and (5) surface properties of mature lunar soils appear to be almost independent of chemical composition and mineralogy, but there are some variations in their reactivity toward water.
    Keywords: CHEMISTRY
    Type: NASA-CR-140194
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  • 89
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    Operations planning simulation: Model study (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The use of simulation modeling for the identification of system sensitivities to internal and external forces and variables is discussed. The technique provides a means of exploring alternate system procedures and processes, so that these alternatives may be considered on a mutually comparative basis permitting the selection of a mode or modes of operation which have potential advantages to the system user and the operator. These advantages are measurements is system efficiency are: (1) the ability to meet specific schedules for operations, mission or mission readiness requirements or performance standards and (2) to accomplish the objectives within cost effective limits.
    Keywords: GENERAL
    Type: NASA-CR-120429 , SU-OPS-RP-74-0001
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  • 90
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    Nonlinear models for estimating GSFC travel requirements (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A methodology is presented for estimating travel requirements for a particular period of time. Travel models were generated using nonlinear regression analysis techniques on a data base of FY-72 and FY-73 information from 79 GSFC projects. Although the subject matter relates to GSFX activities, the type of analysis used and the manner of selecting the relevant variables would be of interest to other NASA centers, government agencies, private corporations and, in general, any organization with a significant travel budget. Models were developed for each of six types of activity: flight projects (in-house and out-of-house), experiments on non-GSFC projects, international projects, ART/SRT, data analysis, advanced studies, tracking and data, and indirects.
    Keywords: GENERAL
    Type: NASA-TN-D-7642 , G-7415 , D-7642
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  • 91
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    Technology utilization in a non-urban region: Further impact and technique of the Technology Use Studies Center (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Updated information pertaining to clients who receive and use information disseminated by the Technology Use Studies Center (TUSC) is reported. Charts are provided which indicate TUSC's performance in information dissemination and technical assistance in terms of quantities of searches accomplished during several contract years. The faculty information service is described, along with details of cooperation with other agencies. Specific searches are listed according to subject, client, and client location, and a measure of client response to services provided is indicated by the included selection of transfer and impact reports. The impetus behind the formation of the general aviation news letter is also described.
    Keywords: GENERAL
    Type: NASA-CR-139565
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  • 92
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    Digital servo control of random sound test excitation (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A digital servocontrol system for random noise excitation of a test object in a reverberant acoustic chamber employs a plurality of sensors spaced in the sound field to produce signals in separate channels which are decorrelated and averaged. The average signal is divided into a plurality of adjacent frequency bands cyclically sampled by a time division multiplex system, converted into digital form, and compared to a predetermined spectrum value stored in digital form. The results of the comparisons are used to control a time-shared up-down counter to develop gain control signals for the respective frequency bands in the spectrum of random sound energy picked up by the microphones.
    Keywords: GENERAL
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  • 93
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    Star scanner (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A star scanner on a spin stabilized spacecraft is described which includes a reticle with a pair of slits having different separations as a function of the spacecraft vertical plane, to form a V slit. The time between a star image crossing one of the slits relative to a reference telemetry time provides an indication of azimuth angle. The time between the image crossing the two slits provides an indication of elevation angle of the star. If a star cluster is detected such that two stars pass the slits in less time than normally required for a single star to cross the two slits, an indication of the cluster occurrence is derived. Means are provided to prevent effective detection of large celestial bodies, such as the sun or moon.
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  • 94
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    Centrifugal lyophobic separator (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A centrifugal separator is described using a lyophobic filter for removing liquid particles from a mixed stream of gas and liquid under various negative or positive external acceleration conditions as well as zero g or weightless conditions. Rotating the lyophobic filter and inclining the filter to the entering flow improves the lyophobic properties of the filter, provides gross separation of larger liquid particles, and prevents prolonged contact of liquid droplets with the spinning filter which might change the filter properties or block the filter.
    Keywords: GENERAL
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  • 95
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    Kinetics of homogeneous nucleation in many component systems (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Reiss's classical treatment of the kinetics of homogeneous nucleation in a system containing two chemical components is extended to many-component systems. The formulation is analogous to the pseudo-stationary state theory of chemical reaction rates with the free energy as a function of the composition of the embryo taking the place of the potential energy as a function of interatomic distances.
    Keywords: CHEMISTRY
    Type: NASA-CR-139529 , WIS-TCI-510
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  • 96
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    Determinants of project success (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The interactions of numerous project characteristics, with particular reference to project performance, were studied. Determinants of success are identified along with the accompanying implications for client organization, parent organization, project organization, and future research. Variables are selected which are found to have the greatest impact on project outcome, and the methodology and analytic techniques to be employed in identification of those variables are discussed.
    Keywords: GENERAL
    Type: NASA-CR-139407
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  • 97
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    Automated Firearms Identification System (AFIDS), phase 1 (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Items critical to the future development of an automated firearms identification system (AFIDS) have been examined, with the following specific results: (1) Types of objective data, that can be utilized to help establish a more factual basis for determining identity and nonidentity between pairs of fired bullets, have been identified. (2) A simulation study has indicated that randomly produced lines, similar in nature to the individual striations on a fired bullet, can be modeled and that random sequences, when compared to each other, have predictable relationships. (3) A schematic diagram of the general concept for AFIDS has been developed and individual elements of this system have been briefly tested for feasibility. Future implementation of such a proposed system will depend on such factors as speed, utility, projected total cost and user requirements for growth. The success of the proposed system, when operational, would depend heavily on existing firearms examiners.
    Keywords: GENERAL
    Type: NASA-CR-139371 , JPL-SP-43-8
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  • 98
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    Measurement of plasma temperature and density using radiation absorption (1974)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: A procedure, using a light beam of predetermined wavelength, preferably monochromatic, for measuring plasma characteristics is presented. Light absorbed by the plasma is used to obtain an absorption coefficient for the plasma. From this known coefficient and independent measurement of either the electron density or temperature of the plasma, an equation may be solved to obtain other unknown quantities. In this procedure, the absorption coefficient of the plasma is derived simultaneously for two probing light beams of substantially different predetermined wavelengths. These two coefficients are used to solve the two equations, which are in turn used to determine plasma electron density and temperature.
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  • 99
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    Compatibility testing of spacecraft materials and space-storable liquid propellants (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Compatibility measurements were made for aluminum 2219-T87 alloy and titanium 6Al-4V alloy in the presence of liquid fluorine and flox. Results of post test characterization after exposure durations of 61 and 70 weeks are presented. Results of the total test program are analyzed.
    Keywords: CHEMISTRY
    Type: NASA-CR-139281 , TRW-23162-6023-RU-00
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  • 100
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    An implicit semianalytic numerical method for the solution of nonequilibrium chemistry problems (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The first order differential equation form systems of equations. They are solved by a simple and relatively accurate implicit semianalytic technique which is derived from a quadrature solution of the governing equation. This method is mathematically simpler than most implicit methods and has the exponential nature of the problem embedded in the solution.
    Keywords: CHEMISTRY
    Type: NASA-TM-X-71985
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