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

Now showing items 2241-2260 of 3613

    • NASA-LLIS-1596 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2005
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      The requirements for the ensemble suite were derived from the scene requirements which were derived from the individual technologies, which made it difficult to establish measurement criteria ...
      Subject(s) : Risk Management/Assessment ,

    • NASA-LLIS-0723 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Practice:
      To produce high quality, reliable software, use Independent Verification and Validation (IV&V) in an independent, systematic evaluation process throughout the software life cycle. Using the ...

    • NASA-LLIS-1807 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2007
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      Despite the unusually large percentage of the Phoenix design and hardware that was inherited from previous Mars spaceflight projects, the format used for Phoenix project system and subsystem ...
      Subject(s) : Additional Categories. , Additional Categories.Flight Equipment , Additional Categories.Hardware , Additional Categories.Packaging,Handling,Storage , Additional Categories.Payloads , Additional Categories.Risk Management/Assessment , Additional Categories.Software , Additional Categories.Spacecraft , Engineering Design (Phase C/D). , Engineering Design (Phase C/D).Lander Systems , Engineering Design (Phase C/D).Robotics , Engineering Design (Phase C/D).Software Engineering , Engineering Design (Phase C/D).Spacecraft and Spacecraft Instruments , Integration and Testing , Missions and Systems Requirements Definition. , Missions and Systems Requirements Definition.Configuration control and data management , Missions and Systems Requirements Definition.Planetary entry and landing concepts , Missions and Systems Requirements Definition.Review boards , Program Management. , Program Management.Acquisition / procurement strategy and planning , Program Management.Configuration and data management , Program Management.Contractor relationships , Program Management.Program level review processes , Safety and Mission Assurance. , Safety and Mission Assurance.Reliability , Safety and Mission Assurance.Review systems and boards , Systems Engineering and Analysis. , Systems Engineering and Analysis.Planning of requirements verification processes ,

    • NACA-TR-546 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1937
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: in determining the effect of turbulence on the forces exerted on bodies in the air stream of a wind tunnel, it is commonly assumed that the indications of the standard Pitot-static tube used to determine the air speed are ...
      Subject(s) : AERODYNAMIC , ANEMOMETERS , CIRCULAR , DISKS , DRAG , EFFECTS , FLAT , FLOW , PITOT , PLATES , SHAPES , TESTS , TUBES , TUNNEL , TUNNELS , TURBULENCE , TURBULENT , WIND ,

    • NASA-LLIS-1517 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2005
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      During welding operations at the E-Complex in support of the Full-Volume RP Construction Project at Stennis Space Center, a fire occurred as a result of welding/cutting operations being ...
      Subject(s) : Accident Investigation , Emergency Preparedness , Energetic Materials - Explosive/Propellant/Pyrotechnic , Fire Protection , Human Factors , Policy & Planning , Risk Management/Assessment , Safety & Mission Assurance , Test Facility ,

    • NASA-TR-R-57 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1960
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: This report presents the status of spin research for recent airplane designs as interpreted at the Langley Research Center of the National Aeronautics and Space Administration. Major problem areas discussed include: (1) ...

    • NASA-LLIS-6146 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2012
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Design of vehicle propulsion systems requires explicit definition of fluid properties across component interfaces to ensure safety and reliability. The propellant delivery system components are designed and verified to ...
      Subject(s) : 0.Accident Investigation , 1.Ground processing and manifesting , 1.Level II/III requirements definition , 1.Long term sustainability and maintenance planning , 1.Maintenance , 1.Propulsion ,

    • NACA-TR-1224 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1955
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: An investigation was made to determine the effects of wing position and fuselage size on the low-speed static and rolling stability characteristics of airplane models having a triangular wing and vertical tail surfaces. (author)
      Subject(s) : AERODYNAMIC , AERODYNAMICS , AIRCRAFT , ASSEMBLIES , BODY , CONFIGURATIONS , DELTA , DIMENSIONS , DYNAMICS , FLUID , FUSELAGES , INTERACTIONAL , LATERAL , LOCATION , LONGITUDINAL , LOW , MODELS , POSITION , ROLLING , SIZE , SPEED , STABILITY , STABILIZERS , STATIC , TAIL , TESTS , TUNNEL , WIND , WING , WINGS ,

    • NASA NPD 3713.6 REV P 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2007
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: APPLICABILITY
      This Directive is applicable to NASA Headquarters and Centers, including Component Facilities, and those employees paid from nonappropriated funds.

    • NASA-TN-D-424 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1960
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Design charts are presented from which the buckling strength of corrugated shear webs can be determined. The charts are applicable to webs with supported edges in which the edge rotations of the web along lines of support ...
      Subject(s) : ANALYSIS , BENDING , BUCKLING , CORRUGATED , ELASTIC , FORCES , LOADS , MATHEMATICAL , MODELS , MOMENTS , PLATES , SANDWICH , SHEAR , STRESS , STRUCTURES , SUPPORTS , WEBS ,

    • NASA-CR-4499 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1993
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: This report presents the derivation of a frequency domain theory and working equations for radiation of propeller harmonic noise in the presence of angular inflow. In applying the acoustic analogy, integration over the ...
      Subject(s) : ACOUSTIC FREQUENCIES , AEROACOUSTICS , COMPUTER PROGRAMS , DIRECTIVITY , FAR FIELDS , GREEN'S FUNCTIONS , NEAR FIELDS , NOISE PREDICTION (AIRCRAFT) , PROPELLER BLADES , PROPELLER FANS , PROPELLER NOISE , PROP-FAN TECHNOLOGY , QUADRUPOLES ,

    • NASA-LLIS-0463 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1994
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      On March 25, 1993 an Atlas/Centaur launch vehicle (AC-74, Atlas1) inserted a Hughes UHF followon spacecraft into orbit with an apogee altitude of 4,967 nmi instead of the ...
      Subject(s) : Hardware , Parts Materials & Processes ,

    • NASA-LLIS-0273 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1993
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      Two days prior to the planned delivery of the flight Solar Array Drive, the unit was accidentally dropped on the floor. An employee who was unfamiliar with the device tilted the assembly to ...
      Subject(s) : Policy & Planning , Risk Management/Assessment , Test & Verification ,

    • NASA-LLIS-1039 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2001
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      In order to mitigate seal extrusion-related failures in the Primary Reaction Control System (PRCS) pilot-operated valve (POV), an effort was undertaken to develop a ...
      Subject(s) : Hardware , Parts Materials & Processes , Research & Development , Test & Verification ,

    • NASA-TN-D-8360 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1976
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: An investigation was made in the V/STOL tunnel to determine, by the trailing wing sensor technique, the effectiveness of various segments of the existing flight spoilers on a medium range wide body tri-jet transport airplane ...
      Subject(s) : AERODYNAMIC , AIRCRAFT , BREAKDOWN , COEFFICIENTS , DIMENSIONAL , EDGE , FLAPS , FLIGHT , FLOW , SPOILERS , TESTS , THREE , TRAILING , TRANSPORT , TUNNEL , VORTEX , WIND ,

    • NASA-LLIS-1304 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2002
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      A positive experience resulted from establishing an effective Steering Group of senior managers from the participating mission organizations.
      Subject(s) : Administration/Organization ,

    • NACA-RM-L55I20 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1955
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: INTRODUCTION
      The longitudinal instability that occurs for some swept-wing air planes operating at high lift coefficients has been found to result from flow separation on the wing or improper location of the horizontal ...

    • NASA-CR-145 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1964
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Effect of spiral longitudinal vortices on turbulent boundary layer skin friction.
      Subject(s) : SKIN FRICTION , TURBULENT BOUNDARY LAYER , VORTEX , VORTICES ,

    • NASA-TN-D-2056 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1963
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Pneumatic tire hydroplaning.
      Subject(s) : HYDROPLANE , HYDROPLANING , PNEUMATIC EQUIPMENT , PNEUMATICS , TIRES ,

    • NASA-LLIS-0366 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1995
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      IRAS posed new challenges to contamination control due to the extremely low temperatures (3 degrees Kelvin) required to achieve successful low noise infrared signal detector operation in the ...
      Subject(s) : Cryogenic Systems , Cryogenics ,