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  • Other Sources  (3,623)
  • AERODYNAMICS  (1,272)
  • CHEMISTRY  (1,193)
  • PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR  (1,158)
  • 1970-1974  (3,607)
  • 1950-1954  (16)
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  • Other Sources  (3,623)
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  • 1
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    Preliminary results on tritium in Surveyor 3 material (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Painted aluminum samples taken from Surveyor 3 were examined for possible tritium implanted by the solar wind. There was found to be a correlation of tritium content with exposure to sunlight. The amount of tritium in sample 1011,2 nearly perpendicular to the lunar surface exceeded the amount expected from the tritium content of lunar rock 12002 by at least a factor of 3. It is concluded that if there is tritium implanted by solar wind on lunar rocks, it is not retained by them.
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 180-184
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Muon production (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The production of muons by collisions of primary cosmic ray particles with air nuclei is discussed. From these collisions pions and kaons are produced which then decay into muons. Two cases, oblique incidence and vertical incidence, are analyzed theoretically. Theoretical calculations agree well with observed data.
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: Significant Accomplishments in Sci., 1970; p 212-216
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Auger electrons (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Results are briefly described of efforts undertaken to assign proper electron transitions to the Auger lines of copper. Based on these investigations, using X-ray excitation and higher resolution, all three prominent Auger peaks of copper were determined to be L3MM type rather than L2MM type.
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: Significant Accomplishments in Sci., 1970; p 103-106
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    New polymer systems: Chain extension by dianhydrides (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The results are presented for a systematic investigation on the use of anhydrides to prepare stable elastomeric materials for space use, under mild reaction conditions. The three anhydrides investigated were found to provide effective chain extension of hydroxy-terminated poly(alkylene oxides) and poly(butadienes). These were tetrahydrofuran tetracarboxylic dianhydride, pyromellitic dianhydride, and benzophenone tetracarboxylic diahydride. The most effective catalyst investigated was ferric acetylacetonate, which resulted in chain extension at 333 K (60 C). One feature of these anhydride reactants is that they are difunctional as anhydrides, but tetrafunctional if conditions are selected that lead to reaction of all carboxyl groups. Therefore, chain extension can be effected and then followed by crosslinking via the residual carboxyl groups.
    Keywords: CHEMISTRY
    Type: JPL Quart. Tech. Rev., Vol. 1, No. 4; p 97-103
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Experiment D008: Radiation in the Spacecraft (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The ionization and penetration power of various primary and secondary radiations that were present within the Gemini spacecraft was studied. This was accomplished by measurement of the contributions to dose according to profile, particle type, time, and position (location) within the spacecraft. Both active- and passive-dosimetry data collected in this experiment showed that no radiation hazard was associated with manned space operations within the Gemini spacecraft at altitudes as great as 310 kilometers in the South Atlantic anomaly region. This conclusion is warranted also by theoretical calculations.
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: NASA. Manned Spacecraft Center The Gemini Program: Phys. Sci. Expt. Sum.; p 227-272
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  • 6
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    Experiment M409: Bremsstrahlung spectrometer (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Spectrometric data were used to gain information for computation of the flux-energy spectra of bremsstrahlung inside the Gemini spacecraft and to determine if energetic electrons are able to penetrate the vehicle walls. The spectra were compared with computer predicted bremsstrahlung spectra by the use of data from beta spectrometers flown on Gemini 10 and 12 missions. The calculations of bremsstrahlung radiation involved uncertainties because of the small amount of information available on cross-section interaction and because of the complex, heterogeneous composition of the spacecraft. The bremsstrahlung detector was designed for time-differentiated measurement of the electron-induced gamma rays over a large section of the vehicle. Preliminary analysis of the data obtained during the missions was indicative that electrons did penetrate the spacecraft wall.
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: The Gemini Program: Phys. Sci. Expt. Sum.; p 169-184
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    NASA TECHNICAL REPORTS
  • 7
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    Application of advanced aerodynamics to future transport aircraft (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Applications of supercritical airfoils to transport aircraft designs
    Keywords: AERODYNAMICS
    Type: NASA AIRCRAFT SAFETY AND OPERATING PROBL., VOL. 1 1971; P 165-176
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    NASA TECHNICAL REPORTS
  • 8
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    Aircraft response to the wing trailing vortices generated by large jet transports (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Flight tests for evaluating effect of wing-tip vortex wake generated by large jet transports on smaller aircraft
    Keywords: AERODYNAMICS
    Type: NASA AIRCRAFT SAFETY AND OPERATING PROBL., VOL. 1 1971; P 115-126
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  • 9
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    Progress report on wing-trailing-vortex studies (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Effect of wing-tip vortex wakes generated by large jet transport aircraft on smaller airplanes
    Keywords: AERODYNAMICS
    Type: NASA AIRCRAFT SAFETY AND OPERATING PROBL., VOL. 1 1971; P 101-113
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Gust alleviation (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Alleviation of lateral and longitudinal gust effects on aircraft
    Keywords: AERODYNAMICS
    Type: PERFORMANCE AND DYN. OF AEROSPACE VEHICLES 1971; P 505-553
    Format: text
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    NASA TECHNICAL REPORTS
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