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  • 1
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    Southern Agriculture (1909)
    American Association for the Advancement of Science
    Details
    Publication Date: 1909-01-01
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science
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    PAPER CURRENT
  • 2
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    Pressure-Sensitive Paint and Video Model Deformation Systems at the NASA Langley Unitary Plan Wind Tunnel (1999)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: Pressure-sensitive paint (PSP) and video model deformation (VMD) systems have been installed in the Unitary Plan Wind Tunnel at the NASA Langley Research Center to support the supersonic wind tunnel testing requirements of the High Speed Research (HSR) program. The PSP and VMD systems have been operational since early 1996 and provide the capabilities of measuring global surface static pressures and wing local twist angles and deflections (bending). These techniques have been successfully applied to several HSR wind tunnel models for wide ranges of the Mach number, Reynolds number, and angle of attack. A review of the UPWT PSP and VMD systems is provided, and representative results obtained on selected HSR models are shown. A promising technique to streamline the wind tunnel testing process, Modern Experimental Design, is also discussed in conjunction with recently-completed wing deformation measurements at UPWT.
    Keywords: Nonmetallic Materials
    Type: 1997 NASA High-Speed Research Program Aerodynamic Performance Workshop; Volume 1; Part 1; 509-560; NASA/CP-1999-209691/VOL1/PT1
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Pressure-Sensitive Paint and Video Model Deformation Systems at the NASA Langley Unitary Plan Wind Tunnel (1999)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: Pressure-sensitive paint (PSP) and video model deformation (VMD) systems have been installed in the Unitary Plan Wind Tunnel at the NASA Langley Research Center to support the supersonic wind tunnel testing requirements of the High Speed Research (HSR) program. The PSP and VMD systems have been operational since early 1996 and provide the capabilities of measuring global surface static pressures and wing local twist angles and deflections (bending). These techniques have been successfully applied to several HSR wind tunnel models for wide ranges of the Mach number, Reynolds number, and angle of attack. A review of the UPWT PSP and VMD systems is provided, and representative results obtained on selected HSR models are shown. A promising technique to streamline the wind tunnel testing process, Modern Experimental Design, is also discussed in conjunction with recently-completed wing deformation measurements at UPWT.
    Keywords: Nonmetallic Materials
    Type: 1997 NASA High-Speed Research Program Aerodynamic Performance Workshop; Volume 1; Part 1; 509-542; NASA/CP-1999-209691/VOL1/PT1
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    A combined boundary-profile and automated data-reduction and analysis system (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: A portable boundary-layer meteorological data-acquisition and analysis system is described which employs a small tethered balloon and a programmable calculator. The system is capable of measuring pressure, wet- and dry-bulb temperature, wind speed, and temperature fluctuations as a function of height and time. Other quantities, which can be calculated in terms of these, can also be made available in real time. All quantities, measured and calculated, can be printed, plotted, and stored on magnetic tape in the field during the data-acquisition phase of an experiment.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Boundary-Layer Meteorology; 10; Aug. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Airport noise impact reduction through operations (1981)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The effects of various aeronautical, operational, and land-use noise impact reduction alternatives are assessed for a major midwestern airport. Specifically, the relative effectiveness of adding sound absorbing material to aircraft engines, imposing curfews, and treating houses with acoustic insulation are examined.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: The 1980 Aircraft Safety and Operating Probl., Pt. 2; p 759-778
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Pilot evaluation of experimental flight trajectories in the near-terminal area (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Advanced cockpit avionics systems now under development at NASA Langley Research Center will provide the means for effectively utilizing MLS technology to achieve a number of important objectives in the near-terminal airspace. A simulator study has recently been completed at NASA Langley Research Center in which guest pilots from a number of airlines were asked to fly curved ground tracks designed to avoid population centers in four airport communities. Eight two-man crews comprised of commercial line pilots, and three NASA crews each evaluated a total of eight departures and eight approaches on the basis of such factors as workload, safety, passenger acceptance, controllability, and piloting skill. Various physical measurements were also made, including cross-track errors, altitude errors, bank angles, and fuel flow rates. Half of the trajectories were curved and designed to be population-minimal, and half were designed to represent conventional ground tracks. The objective of the study was to determine if statistically significant differences could be detected between curved and conventional ground tracks on the basis of these parameters.
    Keywords: RESEARCH AND SUPPORT FACILITIES (AIR)
    Type: AIAA PAPER 86-2074
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Airport-Noise Levels and Annoyance Model (ALAMO) system's reference manual (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The airport-noise levels and annoyance model (ALAMO) is described in terms of the constituent modules, the execution of ALAMO procedure files, necessary for system execution, and the source code documentation associated with code development at Langley Research Center. The modules constituting ALAMO are presented both in flow graph form, and through a description of the subroutines and functions that comprise them.
    Keywords: ACOUSTICS
    Type: NASA-TM-87694 , NAS 1.15:87694
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Airport-Noise Levels and Annoyance Model (ALAMO) user's guide (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A guide for the use of the Airport-Noise Level and Annoyance MOdel (ALAMO) at the Langley Research Center computer complex is provided. This document is divided into 5 primary sections, the introduction, the purpose of the model, and an in-depth description of the following subsystems: baseline, noise reduction simulation and track analysis. For each subsystem, the user is provided with a description of architecture, an explanation of subsystem use, sample results, and a case runner's check list. It is assumed that the user is familiar with the operations at the Langley Research Center (LaRC) computer complex, the Network Operating System (NOS 1.4) and CYBER Control Language. Incorporated within the ALAMO model is a census database system called SITE II.
    Keywords: ACOUSTICS
    Type: NASA-TM-87695 , NAS 1.15:87695
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Location of noise sources using a phase-slope method (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Two three-element microphone arrays have been used to predict the position of both pure-tone and broadband noise sources in an anechoic chamber under different ground impedance conditions. Source positions are predicted using the slope of phase-frequency plots between array elements. A phase-slope method for quantitatively assessing both the accuracy and precision of estimates of noise source location is introduced and illustrated. When the phase-slope method is used, there is higher accuracy and more precision in estimates of source location with a small ground impedance than with a large ground impedance. As would be expected, ground impedance effects are larger for low elevation angles than for high elevation angles.
    Keywords: ACOUSTICS
    Type: NASA-TP-2505 , L-15793 , NAS 1.60:2505
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    End-mass instrumentation for the first SEDS/Delta II mission (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The dynamics instrumentation is described which will be flown in the end-mass of the first tethered satellite to be deployed from a Delta II launch vehicle with the SEDS (Small Expendable Deployer System) low-tension deployer. Transducers, signal conditioning, power supply design, data acquisition procedures and data recovery plans are discussed. The effects of temperature variations and other potential error sources are considered.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: AIAA PAPER 90-0537
    Format: text
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    NASA TECHNICAL REPORTS
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