NASA - National Aeronautics and Space Administration (NASA): Recent submissions

Now showing items 2721-2740 of 3613

    • NASA-LLIS-0272 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1993
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      The ATMOS instrument experienced a randomly occurring failure on the ground that was fixed each time by resetting the instrument. After an extended investigation that failed to identify the ...
      Subject(s) : Hardware , Risk Management/Assessment , Software ,

    • NASA-TN-D-8351 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1976
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: An expression for the Strouhal number of lengthwise cavity oscillations is obtained which includes the effect of length-to-depth ratio. This expression, which agrees well with the experimental data, is also used to predict ...
      Subject(s) : AERODYNAMIC , AIRFRAMES , CAVITIES , FLOW , GENERATORS , MACH , NOISE , NUMBER , OSCILLATIONS , PRESSURE , SOUND , SPECTRA , STROUHAL , SUBSONIC ,

    • NASA-LLIS-1303 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2002
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      Science requirements were clearly defined at the beginning of the mission and served as a basis for clear understanding of mission expectations between the project and HQ.
      Subject(s) : Administration/Organization ,

    • NACA-RM-L55G08 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1955
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: INTRODUCTION
      Recently a wind-tunnel test program was undertaken at the Langley Laboratory of the National Advisory Committee for Aeronautics to obtain aerodynamic data in the transonic and supersonic speed ranges for ...

    • NASA-CR-33 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1964
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Random process theory - peak prediction, structural fatigue damage, and catastrophic structural failure
      Subject(s) : FAILURE , FAILURE MODE , FAILURE MODES , FATIGUE , FATIGUE (MATERIALS) , PROBABILITY THEORY , RANDOM NOISE , RANDOM PROCESS , RANDOM PROCESSES , RAYLEIGH EQUATIONS , STRUCTURAL FAILURE ,

    • NASA-LLIS-4977 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2012
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: It is important to synchronize all projects periodically to a single program-approved technical baseline to ensure commonality in design across all projects. The approved technical baseline and architecture configuration ...

    • NASA-TN-D-1584 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1964
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Effects of variable-amplitude axial loads and ground-air-ground cycles on fatigue life of aluminum alloys.
      Subject(s) : ALUMINUM ALLOY , ALUMINUM ALLOYS , AXIAL LOADS , CYCLES , FATIGUE LIFE , LOADS (FORCES) , RANDOM LOAD , RANDOM LOADS ,

    • NASA NPD 3000.1 REV C 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2010
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: APPLICABILITY
      a. This NPD is applicable to NASA Headquarters and NASA Centers, including Component Facilities, and Technical and Service Support Centers.
      b. This NPD does not apply to the Office ...

    • NASA-LLIS-0340 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1994
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      A characteristic of rotor machinery has been subsynchronous whirl rotor-dynamics, most recently experienced on the SSME. This motion takes the form of whirling or whipping ...
      Subject(s) : Hardware ,

    • NASA-LLIS-1997 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2008
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      NASA use of general-industry standards and specs issued by standards developing organizations and international bodies is explicitly encouraged by government policy, but these general-use ...
      Subject(s) : Additional Categories.NASA Standards , Missions and Systems Requirements Definition.Level 0/1 Requirements , Safety and Mission Assurance.Early requirements and standards definition , Systems Engineering and Analysis.Engineering design and project processes and standards , Systems Engineering and Analysis.Level II/III requirements definition ,

    • NASA-LLIS-1072 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1998
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      Shuttle-Mir Lessons Learned Analysis and Application.
      Subject(s) : Aerospace Safety Advisory Panel , Ground Operations , Policy & Planning , Risk Management/Assessment , Safety & Mission Assurance ,

    • NASA NPD 1000.3 REV D 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2008
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Purpose
      This NASA Policy Directive (NPD) documents the NASA organization, defines terms, and sets forth the standards and requirements for establishing, modifying, and documenting the NASA organizational ...

    • NACA-RM-A8E21 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1948
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: INTRODUCTION
      Wings of triangular plan form, combining the structural advantages of low aspect ratio and high taper ratio with the aerodynamic benefits of a highly swept leading edge, have been shown to be suitable for ...
      Subject(s) : COMPLETE , CONTROLS , EFFECTS , FLAP , FLAPS , HINGE , LONGTIUDINAL , MACH , MOMENTS , NUMBER , STABILITY , STATIC , TYPE , WINGS ,

    • NASA-LLIS-0686 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Practice:
      Use established design guidelines for selection of materials that provide safe operation when exposed to elemental fluorine and fluorine-oxygen (FLOX) mixtures.

    • NASA-LLIS-1757 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2006
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      During facility refurbishment, an electrical conduit was misidentified as being a pneumatic tube and shorted during a cutting operation
      Subject(s) : Additional Categories. , Additional Categories.Configuration Management , Additional Categories.Energy , Additional Categories.Facilities , Additional Categories.Ground Operations , Additional Categories.Industrial Operations , Additional Categories.Personal Protective Equipment , Additional Categories.Program and Project Management , Additional Categories.Risk Management/Assessment , Missions and Systems Requirements Definition. , Missions and Systems Requirements Definition.Configuration control and data management , Program Management. , Program Management.Communications between different offices and contractor personnel , Program Management.Configuration and data management , Program Management.Contractor relationships , Program Management.Risk management , Safety and Mission Assurance. , Safety and Mission Assurance.Configuration Change Control , Systems Engineering and Analysis. , Systems Engineering and Analysis.Planning of requirements verification processes ,

    • NASA-TR-R-474 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1977
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: An engineering-type method is presented for computing normal-force and pitching-moment coefficients for slender bodies of circular and noncircular cross section alone and with lifting surfaces. In this method, a semi-empirical ...
      Subject(s) : AERODYNAMIC , ANGLE , ASSEMBLIES , ATTACK , BODIES , BODY , CHARACTERISTICS , CONFIGURATIONS , FORCES , LIFTING , MOMENTS , PITCHING , REVOLUTION , SLENDER , TAIL , WING ,

    • NASA-LLIS-1531 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2005
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      A feedthrough condition commonly occurs shortly after most JPL spacecraft launches during initial acquisition of the downlink signal. Caused by the extremely strong uplink signal transmitting ...
      Subject(s) : Communication Link , Communication Systems , Communications , Downlink Degradation , Flight Operations , Ground Equipment , Ground Operations , Hardware , Radio Frequency Subsystem , Range Operations , RF Compatibility , RF Interference , Risk Management/Assessment , Safety & Mission Assurance , Signal Acquisition , Spacecraft , Spacecraft Commanding ,

    • NASA-LLIS-0818 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Practice:
      The source for selection of acceptable flight quality EEE parts for use on Goddard projects is the GSFC Preferred Parts List (PPL-20) (Reference 2). PPL-20 complements NASA Standard Electrical, ...

    • NASA-LLIS-0451 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1991
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      When a quick disconnect was checked for compatibility with hydrazine the "O" seal disintegrated. It was found to have been made of material other than the required ...
      Subject(s) : Parts Materials & Processes , Safety & Mission Assurance ,

    • NASA-TN-D-7613 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1974
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: The high temperature vaporization of the metal-carbon systems TiC, ZrC, HfC, and ThC was studied by the Knudsen effusion - mass spectrometric method. For each system the metal dicarbide and tetracarbide molecular species ...
      Subject(s) : BEAMS , CARBIDES , COMPOUNDS , ENTHALPY , FLOW , GROUP , HIGH , KNUDSEN , MASS , MOLECULAR , SPECTROMETERS , TEMPERATURE , VAPORIZING ,