U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 23901 - 23925 of 73727

Mechanical Properties of Polymer Nano-Films

November 28, 2011
Author(s)
Junghyun Lee, Jun Y. Chung, Christopher Stafford
Three fundamental mechanical properties of supported glassy polystyrene films with thickness ranging from 250 nm to 9 nm were quantitatively determined by a recently developed wrinkling-cracking method. Films below about 40 nm showed a decrease in both

NIST Handbook 150-31, NVLAP Healthcare Information Technology Testing

November 28, 2011
Author(s)
Dana S. Leaman, Lawrence I. Knab
NIST Handbook 150-31 presents the technical requirements and guidance for the accreditation of laboratories under the National Voluntary Laboratory Accreditation Program (NVLAP) Healthcare Information Technology Testing program. It is intended for

Recommendation for Key Derivation through Extraction-then-Expansion

November 28, 2011
Author(s)
Lidong Chen
This Recommendation specifies techniques for the derivation of keying material from a shared secret established during a key establishment scheme defined in NIST Special Publications 800-56A or 800-56B through an extraction-then-expansion procedure.

Viewpoint: Topological Invariants Made Manifest

November 28, 2011
Author(s)
Ian B. Spielman, Gediminas Juzeliunas
Topological order in some single particle cold atom systems can now be measured directly, instead of relying on proxies such as the quantized Hall conductance as is usually the case in conventional materials. This new measurement technique complements the

Towards realization of a large-area, LED-based solar simulator

November 27, 2011
Author(s)
Behrang H. Hamadani, Kangbin Chua, John F. Roller, Howard W. Yoon, Brian P. Dougherty
LED-based solar simulators have shown great promise as alternative light sources for indoor testing of PV cells as compared to their traditional counterparts. However, large-area uniform illumination more suitable for larger cells and module measurements

EVALUATION OF A MICROWAVE-ASSISTED METAL-LABELING STRATEGY FOR QUANTIFICATION OF PEPTIDES VIA RPLC-ICP-MS AND THE METHOD OF STANDARD ADDITIONS

November 26, 2011
Author(s)
Steven J. Christopher, Eric L. Kilpatrick, Lee L. Yu, William C. Davis, blakely adair
NIST has performed preliminary research on applying a calibration methodology based on the method of standard additions to the quantification of lanthanide-labeled peptides via reverse-phase liquid chromatography coupled to inductively coupled plasma mass

Performance Evaluation Experiments on a Laser Spot Triangulation Probe

November 25, 2011
Author(s)
Balasubramanian Muralikrishnan, Wei Ren, Dennis S. Everett, Eric S. Stanfield, Theodore D. Doiron
Laser triangulation probes are increasingly used for dimensional measurements in a variety of applications. At the National Institute of Standards and Technology, we have recently explored the use of laser spot triangulation probes to determine dimensional

Quantum simulation of the hexagonal Kitaev model with trapped ions

November 25, 2011
Author(s)
Dietrich G. Leibfried, Roman Schmied , Janus H. Wesenberg
We present a detailed study of quantum simulations of coupled spin systems in surface-electrode ion-trap arrays, and illustrate our findings with a proposed implementation of the hexagonal Kitaev model [A. Kitaev, Annals of Physics 321,2 (2006)]. The e

Isotope Dilution Liquid Chromatography - Mass Spectrometry Methods for Fat- and Water-Soluble Vitamins in Nutritional Formulations

November 24, 2011
Author(s)
Karen W. Phinney, Catherine A. Rimmer, Jeanice M. Brown Thomas, Lane C. Sander, Katherine E. Sharpless, Stephen A. Wise
Vitamins are essential to human health, and dietary supplements containing vitamins are widely used by individuals hoping to ensure they have adequate intake of these important nutrients. Measurement of vitamins in nutritional formulations is necessary to

Standard Reactions for Comparative Rate Studies: Experiments on the Dehydrochlorination Reactions of 2 Chloropropane, Chlorocyclopentane and Chlorocyclohexane

November 23, 2011
Author(s)
Iftikhar A. Awan, Donald R. Burgess Jr., Wing Tsang, Jeffrey A. Manion
Single pulse shock tube studies of the thermal dehydrochlorination reactions (chlorocyclopentane → cyclopentene + HCl) and (chlorocyclohexane → cyclohexene + HCl) at temperatures of 843 to 1021 K and pressures of 1.4 to 2.4 bar have been carried out using

Guidelines for Fire Design of Steel Beam-Columns: Part II, Beams.

November 22, 2011
Author(s)
M. M. Dwaikat, V. K. Kodur
Steel structures when exposed to fire develop significant fire induced forces and deformations, and these effects are to be properly accounted for in evaluating realistic response of structural systems. The current design methodologies are based on

Ignition Propensity of Hydrogen in the Presence of Metal Surfaces.

November 22, 2011
Author(s)
Chih-Jen Sung, James S. T'ien, Kyle Brady
Hydrogen as an energy carrier has received much attention in recent years as a result of a confluence of economic, environmental, and political pressures on the continued use of fossil fuels. The benefits of using hydrogen fuel over fossil fuel products

Wildfire Modeling.

November 22, 2011
Author(s)
Steven K. Krueger
This report documents the development and testing of the LES (Large Eddy Simulator) version of the WRF (Weather Research and Forecasting) model coupled with SFIRE, the wildland surface fire module, to simulate wildland fires. The relevance of this work to

Tracking the National Fire Problem: The Data behind the Statistics

November 21, 2011
Author(s)
Douglas S. Thomas, David T. Butry
The objective of this report is to support the development of descriptive statistics and associated measures of uncertainty for characterizing, tracking, and better understanding the root causes of the U.S. fire burden by identifying the relevant costs and

Phase-Sensitive Specular Neutron Reflectometry for Imaging the Nanometer Scale Compositional Depth profile of Thin-Film Materials

November 20, 2011
Author(s)
Brian Kirby, Paul A. Kienzle, Brian B. Maranville, Norman F. Berk, J. Krycka, Frank Heinrich, Charles Majkrzak
Neutron reflectometry is a powerful method for probing the molecular scale structure of both hard and soft condensed matter films. Moreover, the phase-sensitive methods which have been developed make it possible for specular neutron reflectometry to be
Displaying 23901 - 23925 of 73727
Was this page helpful?