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Displaying 37151 - 37175 of 74165

Cross-Dimensional Relaxation in Bose-Fermi Mixture

April 1, 2005
Author(s)
J Goldwin, S Inouye, M L. Olsen, Deborah S. Jin
We consider the equilibration rate for fermions in Bose-Fermi mixtures undergoing cross-dimensional rethermalization. Classical Monte Carlo simulations of the relaxation process are performed over a wide range of parameters, focusing on the effects of the

Experiments Toward Non-Contact Safety Standards for Automated Industrial Vehicles

April 1, 2005
Author(s)
Roger V. Bostelman, Tsai Hong Hong, Rajmohan Madhavan
The performance evaluation of an obstacle detection and segmentation algorithm for Automated Guided Vehicle (AGV) navigation in factory-like environments using a new 3D real-time range camera is the subject of this paper. Our approach expands on the US

Genetic Cellular Responses to Tyrosine-Derived Polycarbonate Blends

April 1, 2005
Author(s)
L A. Bailey, Matthew Becker, James A. Cooper, J Kohn, Eric J. Amis
The evaluation and identification of detrimental interactions between biological species and synthetic surfaces is a daunting challenge as the number of materials and control of physical variables increases. In this talk, the physical properties of

Hamiltonian Paths Through Two- and Three-Dimensional Grids

April 1, 2005
Author(s)
William F. Mitchell
This paper addresses the existence of Hamiltonian paths and cycles in two-dimensional grids consisting of triangles or quadrilaterals, and three-dimensional grids consisting of tetrahedra or hexahedra. The paths and cycles may be constrained to pass from

International Comparisons of Femtosecond Laser Frequency Combs

April 1, 2005
Author(s)
Long-Sheng Ma, Zhiyi Bi, A Bartels, Lennart Robertsson, Massimo Zucco, Robert Windeler, G Wilpers, Christopher W. Oates, Leo W. Hollberg, Scott A. Diddams
Two types of international comparisons of femtosecond laser frequency combs have been performed in France and the USA. Five combs were involved in the comparisons. Three combs, of which two are transportable, employ nonlinear photonic crystal fiber (PCF)

Investigations of Noise in Measurements of Electronic Voltage Standards

April 1, 2005
Author(s)
Thomas J. Witt, Yi-hua D. Tang
We have investigated noise in measurements of the 10 V outputs of electronic voltage standards based on Zener diode references (Zeners). Zener outputs were compared to NIST Josephson standards using a digital voltmeter (DVM) to measure voltage differences

Lateral Deformation of Diffusion Couples

April 1, 2005
Author(s)
William J. Boettinger, Geoffrey B. McFadden, Sam R. Coriell, R F. Sekerka, James A. Warren
A model is proposed to describe the shape change (displacement field) of a binary diffusion couple when the intrinsic (lattice) diffusivities of the two substitutional atomic species differ. As for the Kirkendall effect, the displacement is due the

Linearization of Large-Signal Scattering Functions

April 1, 2005
Author(s)
Jan Verspecht, Dylan Williams, Dominique Schreurs, Kate Remley, Michael McKinley
We present an improved smallsignal linearization of large-signal scatteringparameter functions that takes on a convenient form similar to scattering parameters. We develop rules for the evolution of the linearization and large-signal scattering functions

Liquid-state NMR Simulations of Quantum Many-body Problems

April 1, 2005
Author(s)
C. Negrevergne, Rolando Somma, Gerardo Ortiz, Emanuel Knill, R. Laflamme
The n-qubit concurrence canonical decomposition (CCD) is a generalization of the two-qubit canonical decomposition SU(4)=[SU(2) (x) SU(2)] ? [SU(2) (x) SU(2)], where ? is the commutative group which phases the maximally entangled Bell basis. A prequel

Magnetic Method to Characterize the Current Densities in a Breaker Arc

April 1, 2005
Author(s)
Nadia Machkour-Deshayes
The purpose of this research was to use magnetic induction measurements from a low voltage electric arc, to reconstruct the arc''s current density. The measurements were made using Hall effect sensors, which were placed close to, but outside the breaking

Manipulating Cell Adhesion on Gradient Poly(2-Hydroxyethyl Methacrylate)-Grafted Surfaces

April 1, 2005
Author(s)
Ying Mei, Tao Wu, Chang Xu, K J. Langenbach, John T. Elliott, B D. Vogt, Kathryn L. Beers, Eric J. Amis, N Washburn
In this study, a simple and versatile method was developed to prepare the low grafting density initaitor gradient, which was combined with surface initiated atom transfer radical polymerizations (ATRP) to produce a well defined poly(2-hydroxyethyl

Mechanisms of Osteoblast Adhesion on 3D Polymer Scaffolds Made by Rapid Prototyping

April 1, 2005
Author(s)
T DuttaRoy, Francis W. Wang, J J. Stone, E H. Cho, S J. Lockett
In this study, we looked at the adhesion of osteoblasts on 3D polycaprolactone (PCL) scaffolds compared to 2D PCL films and glass coverlsips. This adhesion was quantified after 24 hours by staining for vinculin, a marker of cell-substrate adhesion, and
Displaying 37151 - 37175 of 74165
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