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  • Other Sources  (94)
  • EARTH RESOURCES AND REMOTE SENSING  (50)
  • Launch Vehicles and Launch Operations  (22)
  • AIRCRAFT DESIGN, TESTING AND PERFORMANCE  (13)
  • STRUCTURAL MECHANICS  (9)
  • 2005-2009  (22)
  • 1975-1979  (72)
Collection
  • Other Sources  (94)
Source
Keywords
Years
Year
  • 1
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    Fatigue failure load indicator (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An indicator for recording the load at which a fatigue specimen breaks during the last cycle of a fatigue test is described. A load cell is attached to the specimen which is alternately subjected to tension and compression loads. The output of the load cell which is proportional to the load on the specimen is applied to the input of a peak detector. Each time the specimen is subjected to a compression load, means are provided for applying a positive voltage to the rest of the peak detector to reset it. During the last cycle of the tension load the peak detector measures the maximum load on the specimen. Means are provided for disconnecting the load cell from the peak detector when there is a failure in the specimen.
    Keywords: STRUCTURAL MECHANICS
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Constellation Launch Vehicles Overview (2009)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This slide presentation reviews the current status of the launch vehicles associated with the Constellation Program. These are the Ares I and the Ares V. An overview of the Ares launch vehicles is included. The presentation stresses that the major criteria for the Ares I launcher is the safety of the crew, and the presentation reviews the various features that are designed to assure that aim. The Ares I vehicle is being built on a foundation of proven technologies, and the Ares V will give NASA unprecedented performance and payload volume that can enable a range of future missions. The CDs contain videos of scenes from various activities surrounding the design, construction and testing of the vehicles.
    Keywords: Launch Vehicles and Launch Operations
    Type: Human Space Flight Review; Jul 29, 2009; Huntsville, AL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Advanced structures technology applied to a supersonic cruise arrow-wing configuration (1976)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The application of advanced technology to a promising aerodynamic configuration was explored to investigate the improved payload range characteristics over the configuration postulated during the National SST Program. The results of an analytical study performed to determine the best structural approach for design of a Mach number 2.7 arrow-wing supersonic cruise aircraft are highlighted. The data conducted under the auspices of the Structures Directorate of the National Aeronautics and Space Administration, Langley Research Center, established firm technical bases from which further trend studies were conducted to quantitatively assess the benefits and feasibility of using advanced structures technology to arrive at a viable advanced supersonic cruise aircraft.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA. Langley Res. Center Proc. of the SCAR Conf., Pt. 2,; 34 p
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Sampling for area estimation: A comparison of full-frame sampling with the sample segment approach (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The effect of sampling on the accuracy (precision and bias) of crop area estimates made from classifications of LANDSAT MSS data was investigated. Full-frame classifications of wheat and non-wheat for eighty counties in Kansas were repetitively sampled to simulate alternative sampling plants. Four sampling schemes involving different numbers of samples and different size sampling units were evaluated. The precision of the wheat area estimates increased as the segment size decreased and the number of segments was increased. Although the average bias associated with the various sampling schemes was not significantly different, the maximum absolute bias was directly related to sampling unit size.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E83-10256 , NASA-CR-171627 , SR-P1-04160 , NAS 1.26:171627 , LARS-062779
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Processing techniques development (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: There are no author-identified significant results in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E78-10045 , NASA-CR-151610 , LARS-112777 , T-1314/4 , MA-129TA
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Test of spectral/spatial classifier (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The author has identified the following significant results. The supervised ECHO processor (which utilizes class statistics for object identification) successfully exploits the redundancy of states characteristic of sampled imagery of ground scenes to achieve better classification accuracy, reduce the number of classifications required, and reduce the variability of classification results. The nonsupervised ECHO processor (which identifies objects without the benefit of class statistics) successfully reduces the number of classifications required and the variability of the classification results.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E78-10044 , NASA-CR-151609 , LARS-112877 , T-1314/4 , MA-129TA
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Effect of end-ring stiffness on buckling of pressure-loaded stiffened conical shells (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Buckling studies were conducted on truncated 120 deg conical shells having large end rings and many interior reinforcing rings that are typical of aeroshells used as spacecraft decelerators. Changes in base-end-ring stiffness were accomplished by simply machining away a portion of the base ring between successive buckling tests. Initial imperfection measurements from the test cones were included in the analytical model.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TP-1079 , L-11915
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Buckling tests of three 4.6 meter diameter aluminum honeycomb sandwich conical shells loaded under external pressure (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Three aluminum honeycomb sandwich conical shells with a 120 apex angle and a 4.6-m (15.0-ft) base diameter were loaded to failure by a uniform external pressure. The cones differed from one another only in the thickness of their respective face sheets. Test specimen details, test procedure, and test results are discussed. Both buckling and prebuckling data are compared with appropriate theoretical predictions, and good agreement was obtained between test and theory. Extensive imperfection measurements were made and reported on the three cones in the as fabricated condition.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TN-D-7935 , L-9936
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    ECHO user's guide (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: There are no author-identified significant results in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E78-10172 , NASA-CR-151817 , LARS-PUBL-083077
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Low-cost, aerial photographic inventory of tidal wetlands (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: There are no author-identified significant results in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E76-10444 , NASA-CR-148521 , CRS-2-76
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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