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Search Publications

NIST Authors in Bold

Displaying 39226 - 39250 of 73697

Matrix Decompositions and Entanglement Dynamics

February 1, 2004
Author(s)
Stephen Bullock, G K. Brennen
Given a closed system of quantum data, quantum computations are mathematically modeled by exponentially large unitary matrices. A matrix decomposition is an algorithm for factoring matrices, and in this context such an algorithm splits a quantum

Modeling, Simulation and Prediction of Rockwell Hardness Indentation

February 1, 2004
Author(s)
Li Ma, Samuel R. Low III, Richard J. Fields, Roland deWit, Jun-Feng Song, Theodore V. Vorburger, J Zhou
Rockwell hardness test, as a measure of the resistance of a material to localized plastic deformation, is a valuable and widely used mechanical test. However, the accuracy of Rockwell hardness measurement is still in question. The indenter, including both

Molecular Dynamics Study of the Surface Tension of a Binary Immiscible Fluid

February 1, 2004
Author(s)
V Simmons, Joseph B. Hubbard
The planar interface between two liquids having two degrees of affinity to mix has been studied by molecular dynamics simulations. The surface tension is calculated from the normal, P N, and transverse, P T, components of the pressure tensor P for a wide

Near-Threshold Photoassociation of 87 Rb 2

February 1, 2004
Author(s)
M Kemmann, R Mistrik, S Nussmann, H Helm, Carl J. Williams, Paul S. Julienne
Photoassociation of cold 87Rb (5s, fb+2) atom pairs is studied within 15 GHz of the dissociation limits 87Rb(5p3/2, fa) + 87Rb(5s, fb =2). Vibrational levels in the long range, hyperfine-manifolds of the 0? and 1g states arising from the 87Rb(5p3/2)-fine

NIST CFTT: Testing Computer Forensics Tools

February 1, 2004
Author(s)
James R. Lyle
There is a critical need in the law enforcement community to ensure the reliability of computer forensic tools. A capability is required to ensure that forensic software tools consistently produce accurate and objective results. The goal of the Computer

Non-Linear Transport Properties of Carbon Nanotube Filled Polypropylene

February 1, 2004
Author(s)
S B. Kharchenko, Kalman D. Migler, Jack F. Douglas, Jan Obrzut, E A. Grulke
Dispersal of a relatively small concentration [O(1%) volume fraction] of multiwall carbon nanotubes (MWNT) into polypropylene (PP) is found to cause large and complex changes in nanocomposite transport properties. Specifically, both the shear viscosity h(g

Ontology of the Process Specification Language

February 1, 2004
Author(s)
Michael Gruninger
Representing activities and the constraints on their occurrences is an integral aspect of commonsense reasoning, particularly in manufacturing, enterprise modelling, and autonomous agents or robots. In addition to the traditional concerns of knowledge

Optical Anisotropy in Viscoelastic Carbon Nanotube Suspensions

February 1, 2004
Author(s)
D J. Fry, Erik K. Hobbie
Carbon nanotubes, having remarkably high tensile strength, large aspect ratio, and enhanced electrical and thermal properties, continue to hold much promise as filler particles for new classes of composite materials. Processing of these materials, such as

Organogelators and Their Application in Bioactive Dental Composites

February 1, 2004
Author(s)
Elizabeth Wilder, Joseph M. Antonucci
Concerns regarding the use of amalgam fillings in restorative dentistry have spurred an interest in alternative polymeric dental materials such as bioactive composites. However, current polymeric dental composites are inadequate for use in posterior dental

Parallel Programming with Interoperable MPI

February 1, 2004
Author(s)
William L. George, John G. Hagedorn, J E. Devaney
In this article we describe IMPI (Interoperable Message Passing Interface), a message passing protocol that allows you to easily run parallel programs across multiple clusters, SMPs (symmetric multiprocessors), parallel machines, personal computers, and

Peel Test Revisited Using Novel High Throughput Methods

February 1, 2004
Author(s)
A Chiche, Wenhua Zhang, Christopher Stafford
We have developed a novel combinatorial method for peel testing based on the use of gradient techniques, including surface roughness and energy, adhesive or backing layer thickness, and sample annealing temperature. The experimental design provides us with

Phase Field Modeling of Electrochemistry. I. Equilibrium

February 1, 2004
Author(s)
Jonathan E. Guyer, William J. Boettinger, James A. Warren, Geoffrey B. McFadden
A diffuse interface (phase field) model for an electrochemical system is developed. We describe the minimal set of components needed to model an electrochemical interface and present a variational derivation of the governing equations. With a simple set of

Phase Field Modeling of Electrochemistry. II. Kinetics

February 1, 2004
Author(s)
Jonathan E. Guyer, William J. Boettinger, James A. Warren, Geoffrey B. McFadden
The kinetic behavior of the phase field model described in (J.E. Guyer, W.J. Boettinger, J.A. Warren and G. B. McFadden, Phase field modeling of electrochemistry: Equilibrium, unpublished) is explored for advancing (plating) and receding (corroding)

Phase-locked, erbium-fiber-laser-based frequency comb in the near infrared

February 1, 2004
Author(s)
Brian Washburn, Jeffrey W. Nicholson, C. G. Jorgensen, M. Yan, Scott Diddams, Nathan R. Newbury
A phase-locked frequency comb in the near-infrared is demonstrated with a mode-locked, Erbium-doped, fiber laser, whose output is amplified and spectrally broadened in dispersion-flattened highly nonlinear optical fiber to span from 1100 nm to >2200 nm
Displaying 39226 - 39250 of 73697
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