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NIST Authors in Bold

Displaying 45651 - 45675 of 74186

Nonresonant Inelastic X-Ray Scattering Study of Cubic Boron Nitride

July 1, 2001
Author(s)
S Galambosi, J A. Soininen, K Hamalainen, Eric L. Shirley, C C. Kao
During the recent years boron nitride has been extensively studied via numerous experimental techniques because it exhibits several fascinating characteristics such as semiconducting properties, extreme hardness, high thermal conductivity and large band

Novel High-Voltage Range Resistors for Ac-DC Thermal Converters

July 1, 2001
Author(s)
H. O. Wolcott, Joseph R. Kinard Jr., Thomas E. Lipe Jr.
This paper discusses the factors contributing to the ac-dc differences of high-voltage thermal converters. A novel resistor designed to minimize these contributions is described and measurements illustrating its performance are summarized.

On Boundary Condition-Induced States in Low-Dimensional Semiconductor Structures

July 1, 2001
Author(s)
W Jaskolski, R -. Oszwaldowski, Garnett W. Bryant
We examine different solutions of multi-band k.p Hamiltonians. We refer mainly to the intrinsic surface states, with energies in the forbidden energy gap, that were proposed recently for bare and capped nanocrystals. We review analytical and numerical

On/Off Fluorescence Intermittency of Single Semiconductor Quantum Dots

July 1, 2001
Author(s)
M Kuno, D P. Fromm, H F. Hamann, Alan Gallagher, David Nesbitt
Single molecule confocal microscopy is used to investigate the detailed kinetics of fluoresence intermittency in colloidal H-VI (CdSe) semiconductor quantum dots. two distinct modes of behavior are observed corresponding to i) sustained on episodes (Τ on)

On/Off Flurescence Intermittency of Single Semiconductor Quantum Dots

July 1, 2001
Author(s)
M Kuno, D P. Fromm, H F. Hamann, Alan Gallagher, David Nesbitt
Single molecule confocal microscopy is used to investigate the detailed kinetics of fluorescence intermittency in colloidal II-VI (CdSe) semiconductor quantum dots. Two distinct modes of behavior are observed corresponding to (i) sustained on episodes (τ

Panel Session: Educational Needs for Simulation - A Government Perspective

July 1, 2001
Author(s)
Charles R. McLean
At the National Institute of Standards and Technology, the goal of the program in Manufacturing Simulation and Visualization is to accelerate the development of standards that are needed by manufacturing users and simulation software vendors. As such, our

Polymer Chain Relaxation: Surface Outpaces Bulk

July 1, 2001
Author(s)
William E. Wallace, Daniel A. Fischer, K Efimenko, Wen-Li Wu, Jan Genzer
In this work we show how carbon near-edge X-ray absorption fine structure (NEXAFS) can be applied to detect both surface and bulk segmental relaxation in uniaxially deformed polystyrene samples. We demonstrate that by simultaneously monitoring the partial

Recent Developments in the NIST Cryogenic Thermal Transfer Standard Project

July 1, 2001
Author(s)
Thomas E. Lipe Jr., Joseph R. Kinard Jr., Carl D. Reintsema
We describe the development of a cryogenic thermal transfer standard (CTTS) from the first prototype in 1997 to the present version. A description of the superconducting transition-edge sensor (TES) and the development of a superconducting input

Report of the 86th National Conference on Weights and Measures

July 1, 2001
Author(s)
H V. Oppermann, T L. Grimes
The 86th annual meeting of the National Conference on Weights and Measures will be held in Washington, DC, July 22-26, 2001. The theme of the Conference is Success Through Communication and Cooperation.The National Conference on Weights and Measures

Rubber Modeling Using Uniaxial Test Data

July 1, 2001
Author(s)
G Bradley, P C. Chang, G B. McKenna
Accurate modeling of severe rubber deformations is now possible with finite element codes. Many of these codes now have certain strain energy functions built-in, but it is hard to get material parameters and the behavior of the different built-in functions

Self-Organized Critical Behavior in a Deforming Metal

July 1, 2001
Author(s)
Y Shim, Lyle E. Levine, R Thomson
It has been shown that the transport of mobile dislocations through blocking dislocation walls in a deforming metal can be treated by a simple percolation theory. Two different mechanisms for strain propagation are proposed in the strain percolation model

SI Traceability of Force at the Nanonewton Level

July 1, 2001
Author(s)
David B. Newell, Jon R. Pratt, John A. Kramar, Douglas T. Smith, L. A. Feeney, Edwin R. Williams
Although nanonewton force measurements are commonplace in industry, no National Measurement Institute supports a link to the International System of Units (SI) below one newton. The National Institute of Standards and Technology has launched a five-year

Simulations of Filled Polymers on Multiple Length Scales

July 1, 2001
Author(s)
Francis W. Starr, S C. Glotzer
We present simulation results of the effect of nanoscopic and micron-sized fillers on the structure, dynamics, and mechanical properties of polymer melts and blends. At the smallest length scales, we use molecular dynamics simulations to study the effect

Single-Integral-Equation Method for Scattering by Dielectric Cylinders

July 1, 2001
Author(s)
Egon Marx
Electromagnetic scattering of an incident plane monochromatic wave by dielectric or finitely conducting infinite cylinders of arbitrary shape, possibly in the presence of a substrate, can be reduced to the solution of scalar Helmholtz equations in two

Single-Integral-Equation Method for Three-Dimensional Scattering

July 1, 2001
Author(s)
Egon Marx
The fields scattered by a homogeneous dielectric or finitely conducting object can be obtained from two tangential vector fields, the components of the electric and magnetic fields, on the interface. We have adapted the single-integral-equation method for

Some Physics and Chemistry of Hot-Wire Deposition

July 1, 2001
Author(s)
Alan Gallagher
Although hot-wire chemical vapor deposition (HWCVD) involves far fewer species than plasma enhanced CVD, I have used some physics and chemistry in the title because less is known than unknown regarding the hot-wire deposition processes, in even pure silane

Spin Spring Behavior in Exchange Coupled Soft and High-Coercivity Hard Ferromagnets

July 1, 2001
Author(s)
Robert D. Shull, Alexander J. Shapiro, V S. Gornakov, Valerian I. Nikitenko, J.S. Jiang, H Kaper, G Leaf, S D. Bader
The magnetization reversal processes in an epitaxial Fe/Sm 2Co 7 structure were investigated using the magneto-optical indicator film technique. The dependence of the magnitude and the orientation of the structure average magnetization have been studied on
Displaying 45651 - 45675 of 74186
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