#Papers: 28082
#Citation: 907481
H-Index: 329
G-Index: 551
Sociability: 9
Diversity: 4
Activity: 803
Ames Research Center,National Aeronautics and Space Administration,Government of the United States of America
28082Publications
907481 Citations
Org Statistics
Publications & Citations Over Time
Journal Level
AIAA Modeling and Simulation Technologies Conference (2012)
New theory is presented for evolving systems, which are autonomously controlled subsystems that self-assemble into a new evolved system with a higher purpose. Evolving systems of aerospace structures often require additional control when assembling to maintain stability during th...
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High Performance Computing and Communications (2000)
We are developing particle methods oriented at improving computational modeling capabilities of multiscale physical phenomena in : (i) high Reynolds number unsteady vortical flows, (ii) particle laden and interfacial flows, (iii)molecular dynamics studies of nanoscale droplets an...
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Space Programs and Technologies Conference (1990)
A Space Station can provide reliable, long duration access to ug environments for basic and applied biological research. The uniqueness of access to near-weightless environments to probe fundamental questions of significance to gravitational and Space biologists can be exploited ...
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AlAA 4th International Aerospace Planes Conference (1992)
The Arc Jet Complex facilities at NASA Ames and their performance capabilities and support systems are presented. An overview of the typical testing procedures is provided. Attention is focused on a basic understanding of the types of facilities available at Ames for aerothermody...
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This lecture considers a-posteriori error estimates for the numerical solution of conservation laws with time invariant constraints such as those arising in magnetohydrodynamics (MHD) and gravitational physics. Using standard duality arguments, a-posteriori error estimates for th...
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Optimal control theory is used to design linear state variable feedback to improve the dynamic characteristics of a rotor and cantilever wing representing the tilting proprotor aircraft in cruise flight. The response to a vertical gust and system damping are used as criteria for ...
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Infrared spectroscopy in the 2.5-16 microns (4000-625/cm) range is a principle means by which organic compounds are detected and identified in space. Ground-based, airborne, and spaceborne IR spectral studies have already demonstrated that a significant fraction of the carbon in ...
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The time-dependent, compressible Reynolds-averaged, Navier-Stokes equations are applied to solve an axisymmetric supersonic flow around a flat-face/flat-base body with and without a sting support. Important transient phenomena, not yet well understood, are investigated, and the s...
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The subject of the paper will be the assay of fluid/electrolyte hormones. ADH (antidiuretic hormone also referred to as vasopressin) reduces fluid loss by increasing water reabsorption by the kidney. The stimuli for its release from the pituitary are loss of blood, dehydration, o...
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Inlet-performance and external-drag-coefficient characteristics are presented without analysis. Effects are shown of variations of fuselage boundary-layer diverter profile, bleed-surface porosity, bleed-exit area, and inlet ramp, and lip angle.
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I'm going to cover four issues to emphasize why design-by-prototype has significant value: 1) We start too soon and end too late; 2) If you don't know where you're going, go there! 3) Iteration is not a dirty word, it's how we learn; 4) Experts at fabrication know how to design b...
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Overview of Astrobee System design and current status for the SPHERES/Astrobee Working Group quarterly meeting.
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An analysis is made of the stresses in the skin of an inflated nonstretchable sphere during normal, nonrotating impact with a hard flat surface, assuming infinite modulus of elasticity in the skin and infinite propagation speed of stress waves. The analysis is further applied to ...
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Plans for Pioneer 11's approach to Saturn are described. A flyby somewhat parallel to the ring plane is being proposed as an interim target, with a future option held for a possible high risk (or suicide) plunge through the nearly transparent space between Saturn and its rings.
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Most of the materials in the universe are so distant or inaccessible that the only way we can study them is remotely using various types of telescopes. However, in some cases we can study these materials directly because the samples become physically available to us. Some samples...
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The measurement capabilities of laser velocimetry and holographic interferometry in transonic airfoil testing were demonstrated. Presented are representative results obtained with these two nonintrusive techniques on a 15.24 cm chord airfoil section. These results include the den...
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Visibility of point sources approaching or receding from high luminance source in apparent frontal plane
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We are on the path to meet the major challenges ahead for TCAD (technology computer aided design). The emerging computational grid will ultimately solve the challenge of limited computational power. The Modular TCAD Framework will solve the TCAD software challenge once TCAD softw...
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