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There are a total of 13 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Systems for ultrasonic scanning, analysis and imagery
Author(s): Stang, David B.; Generazio, Edward R.; Abe, Steve
Abstract: A variety of ultrasonic scanning and imagery techniques are used to investigate various aspects of materials and microstructures. Two ultrasonic scanning systems are in use by the Lewis Research Center's Structural Integrity ...
NASA Center: Glenn Research Center
Publication Year: 1988
Added to NTRS: 2008-05-30
Accession Number: 88N22414; Document ID: 19880013030
Noise reduction for model counterrotation propeller at cruise by reducing aft-propeller diameter
Author(s): Dittmar, James H.; Stang, David B.
Abstract: The forward propeller of a model counterrotation propeller was tested with its original aft propeller and with a reduced diameter aft propeller. Noise reductions with the reduced diameter aft propeller were measured at ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N19057; Document ID: 19870009624; Report Number: E-3378, NAS 1.15:88936, NASA-TM-88936
Cruise noise of the 2/9th scale model of the Large-scale Advanced Propfan (LAP) propeller, SR-7A
Author(s): Dittmar, James H.; Stang, David B.
Abstract: Noise data on the Large-scale Advanced Propfan (LAP) propeller model SR-7A were taken in the NASA Lewis Research Center 8 x 6 foot Wind Tunnel. The maximum blade passing tone noise first rises with increasing helical tip ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N28398; Document ID: 19870018965; Report Number: E-3746, NAS 1.15:100175, NASA-TM-100175
Switching An Image Processor Between Two Computers
Author(s): Bodis, Jim; Generazio, Edward R.; Stang, David B.
Abstract: Remote-control parallel switching circuit connects either of two computers (but not both simultaneously) to image processor. Includes two parallel switches actuated mechanically by solenoids. Each solenoid controlled by ...
NASA Center: Glenn Research Center
Publication Year: 1993
Added to NTRS: 2005-09-30
Accession Number: 93B10762; Document ID: 19930000762; Report Number: LEW-15451
Multiple-User, Multitasking, Virtual-Memory Computer System
Author(s): Generazio, Edward R.; Roth, Don J.; Stang, David B.
Abstract: Computer system designed and programmed to serve multiple users in research laboratory. Provides for computer control and monitoring of laboratory instruments, acquisition and anlaysis of data from those instruments, and ...
NASA Center: Glenn Research Center
Publication Year: 1993
Added to NTRS: 2005-09-30
Accession Number: 93B10259; Document ID: 19930000259; Report Number: LEW-15295
Dynamic porosity variations in ceramics
Author(s): Generazio, Edward R.; Stang, David B.; Roth, Don J.
Abstract: A silicon carbide disk was sintered from 2090 to 2190 C in 25 C steps. After each sintering step the disk was examined using a precision acoustic scanning system to determine acoustic attenuation and velocity. The bulk ...
NASA Center: Glenn Research Center
Publication Year: 1988
Added to NTRS: 2005-08-25
Accession Number: 89N17668; Document ID: 19890008297; Report Number: E-4358, NAS 1.15:101340, NASA-TM-101340
Ultrasonic imaging of textured alumina
Author(s): Stang, David B.; Salem, Jonathan A.; Generazio, Edward R.
Abstract: Ultrasonic images representing the bulk attenuation and velocity of a set of alumina samples were obtained by a pulse-echo contact scanning technique. The samples were taken from larger bodies that were chemically similar ...
NASA Center: Glenn Research Center
Publication Year: 1989
Added to NTRS: 2005-08-25
Accession Number: 89N28853; Document ID: 19890019482; Report Number: E-4600, NAS 1.15:101478, NASA-TM-101478
Interfacing laboratory instruments to multiuser, virtual memory computers
Author(s): Generazio, Edward R.; Stang, David B.; Roth, Don J.
Abstract: Incentives, problems and solutions associated with interfacing laboratory equipment with multiuser, virtual memory computers are presented. The major difficulty concerns how to utilize these computers effectively in a medium ...
NASA Center: Glenn Research Center
Publication Year: 1989
Added to NTRS: 2005-08-25
Accession Number: 89N19578; Document ID: 19890010207; Report Number: E-4510, NAS 1.15:4106, NASA-TM-4106
Cruise noise of the 2/9 scale model SR-7A propeller
Author(s): Dittmar, James H.; Stang, David B.
Abstract: No Abstract Available
NASA Center: Glenn Research Center
Publication Year: 1988
Added to NTRS: 2004-11-03
Accession Number: 89A12561; Document ID: 19890025190
Cruise noise of the 2/9 scale model of the Large-scale Advanced Propfan (LAP) propeller, SR-7A
Author(s): Dittmar, James H.; Stang, David B.
Abstract: Noise data on the Large-scale Advanced Propfan (LAP) propeller model SR-7A were taken in the NASA Lewis Research Center 8 x 6 foot Wind Tunnel. The maximum blade passing tone noise first rises with increasing helical tip ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2004-11-03
Accession Number: 88A16565; Document ID: 19880029338; Report Number: AIAA PAPER 87-2717
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