Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Allen R. Parker"'
Autor:
Eric L. Christiansen, Francisco Pena, Anthony Piazza, Allen R. Parker, W. Lance Richards, Steven L. Rickman
Publikováno v:
Procedia Engineering. 188:233-240
Spacecraft in low earth orbit (LEO) experience a variety of hazards including exposure to micrometeoroids and orbital debris (MMOD). Average impact speeds for orbital debris on spacecraft in LEO are 9 to 10 km/s, and 20 km/s for micrometeoroids. Due
Autor:
Rorik Peterson, Douglas Keller, Allen R. Parker, Daniel R. Eagan, Hon Man Chan, Gilberto J. Fochesatto
Publikováno v:
The Review of scientific instruments. 90(7)
Electric motors are being investigated in-depth for their application in aerospace. Part of this investigation is the characterization of the loadings from the propulsion devices, in a stationary setup, usually accomplished through the utilization of
Autor:
Allen R. Parker, Francisco Pena, W. Lance Richards, Nathaniel W. Gardner, Michelle T. Rudd, Anthony Piazza, Mark W. Hilburger, Marc R. Schultz
Publikováno v:
2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference.
The National Aeronautics and Space Administration (NASA) Engineering and Safety Center Shell Buckling Knockdown Factor Project is a multicenter project tasked with developing new analysis-based shell buckling design guidelines and design factors (i.e
Publikováno v:
2015 IEEE Avionics and Vehicle Fiber-Optics and Photonics Conference (AVFOP).
An overview of the research and technological development of the fiber-optic sensing system (FOSS) at the National Aeronautics and Space Administration Armstrong Flight Research Center (NASA AFRC) is presented. Theory behind fiber Bragg grating (FBG)
Autor:
Jay J. Ely, Allen R. Parker, Jennifer G. Wilson, Ed Teets, Hon Man Chan, Truong X. Nguyen, Robert H. Brown, Lance Richards, Sean A. Laughter
Publikováno v:
SPIE Proceedings.
A 2015 NASA Aeronautics Mission "Seedling" Proposal is described for a Severe-Environment UAV (SE-UAV) that can perform in-situ measurements in hazardous atmospheric conditions like lightning, volcanic ash and radiation. Specifically, this paper desc
Autor:
Allen R. Parker, W. Lance Richards, Gregory P. Carman, Anthony Piazza, Scott M. Strutner, Frank Pena
Publikováno v:
SPIE Proceedings.
This study reports on signal recovery of optical fiber Bragg gratings embedded in a carbon fiber composite overwrapped pressure vessel's (COPV) structure which have become chirped due to microcracks. COPVs are commonly used for the storage of high pr
Publikováno v:
SPIE Proceedings.
The increased use of composite overwrapped pressure vessels (COPVs) in space and commercial applications, and the explosive nature of pressure vessel ruptures, make it crucial to develop techniques for early condition based damage detection. The need
Publikováno v:
Journal of Mammalogy. 77:1017-1027
We investigated interspecific relationships between fox squirrels ( Sciurus niger ) and raccoons ( Procyon lotor ) through a comparison of use of dens in winter at Muscatatuck National Wildlife Refuge in southcentral Indiana, January–March 1984–1
Publikováno v:
Archives of Disease in Childhood; Dec1964, Vol. 39 Issue 203, p95-100, 6p
Publikováno v:
Radiology. 80:203-207
Multilocular cystic hydronephrosis is one of the more common causes of an abdominal mass in the infant and young child. It is thought to be the result of congenital stricture of the ureteropelvic junction. Intravenous urography is one of the first di