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NIST Authors in Bold

Displaying 34451 - 34475 of 73697

Long-Term Frequency Instability of CPT Clocks With Microfabricated Vapor Cells

April 1, 2006
Author(s)
Vladislav Gerginov, Svenja A. Knappe, P Schwindt, V Shah, Leo W. Hollberg, John E. Kitching
We present an evaluation of the long-term frequency instability and environmental sensitivity of a chip-scale atomic clock based on coherent population trapping, particularly as affected by the light source subassembly. We find that the clock frequency is

Measuring the Modulus of Soft Polymer Networks via a Buckling-Based Metrology

April 1, 2006
Author(s)
Elizabeth A. Wilder, Shu Guo, Sheng Lin-Gibson, Michael J. Fasolka, Christopher Stafford
We present a new method for measuring the modulus of soft polymer networks (E 10 MPa).This metrology utilizes compression-induced buckling of a sensor film applied to the surface of the specimen,where the periodic buckling wavelength, assessed rapidly by

Migrating Legacy Data in the PCB Industry

April 1, 2006
Author(s)
Matthew L. Aronoff, John V. Messina
The printed circuit board (PCB) industry has been using the Gerber (RS-274) file format for decades, resulting in a substantial library of legacy designs. One of the main drawbacks of the Gerber format is that it does not convey design intent. In order to

New Guidelines for d13C Measurements

April 1, 2006
Author(s)
T Coplen, W A. Brandt, M Gehre, Manfred Groning, HAJ Meijer, Blaza Toman, Jennifer R. Verkouteren
Consistency of 13C measurements can be improved 39-47% by anchoring the 13C scale with two isotopic referencematerials differing substantially in 13C/12C. It isrecommended that 13C values of both organic andinorganic materials be measured and expressed

Prevailing Over Wires in Healthcare Environments: Benefits and Challenges

April 1, 2006
Author(s)
David E. Cypher, Nicolas Chevrollier, Nicolas Montavont, Nada T. Golmie
The objectives of this article are to survey the benefits and challenges that poise the deployment and operation of wireless communications in support of healthcare networks. While the main advantages of wireless communications remain to provide ubiquitous

Programmable Vector Point-Spread Function Engineering

April 1, 2006
Author(s)
M R. Beversluis, L Novotny, Stephan J. Stranick
We use a nematic liquid crystal spatial light modulator (SLM) to control the vector point spread function of a microscope objective by manipulating the pupil field polarization. In combination with an achromatic quarter-wave plate, the SLM acts as a

Radiation Properties of IR Calibrators With V-Grooved Surfaces

April 1, 2006
Author(s)
Leonard M. Hanssen, A Prokhorov, Sergey Mekhontsev
Use of linear or concentric grooves is a well-known approach for increasing the surface emissivity to enable the construction of compact blackbody radiators, improve absorptance of stray radiation traps, baffles and thermal radiation detectors, as well as

Recovering Spheres from 3D Point Data

April 1, 2006
Author(s)
Christoph J. Witzgall, Geraldine Cheok, Anthony J. Kearsley
The National Institute of Standards and Technology is involved in developing standard protocols for the performance evaluation of 3D imaging systems, which include laser scanners and LADARs (LAser Detection and Ranging). A LADAR is an optical device that

SANS and XRR Porosimetry of a Polyphenylene Low-k Dielectric

April 1, 2006
Author(s)
M S. Silverstein, Michael Shach-Caplan, Barry J. Bauer, R C. Hedden, V. J. Lee, B G. Landes
Nanometer scale porosity is being introduced into low-k dielectrics in an attempt to achieve the permittivities of less than 2.0. X-ray reflectivity (XRR) solvent porosimetry and small angle neutron scattering (SANS) contrast match solvent porosimetry can

Semantic Enterprise Application Integration Standards

April 1, 2006
Author(s)
Nenad Anicic, Zuran Marjanovic, Nenad Ivezic, Albert T. Jones
This paper investigates the potential of the Semantic Web technologies to support a semantic-based Enterprise Application Integration (EAI) standards architecture. We give a detailed information of the support that these technologies and the underlying

Setting standards and developing technology to aid the human identity testing community

April 1, 2006
Author(s)
John M. Butler, Michael D. Coble, Amy E. Decker, David L. Duewer, Carolyn R. Steffen, Margaret C. Kline, Janette W. Redman, Peter Vallone
Our project team at the U.S. National Institute of Standards and Technology (NIST) is funded by the National Institute of Justice (NIJ) to conduct research that benefits the human identity testing community and to create tools that enable forensic DNA

Some Improved Transition Probabilities for Neutral Carbon

April 1, 2006
Author(s)
Charlotte Fischer
An earlier paper ( Zatsarinny O and Froese Fischer C 2002 J.Phys. B: 35 4669) presented oscillator strengths for transitions from the 2p23P multiplet to high-lying excited states of carbon. The emphasis was on theaccurate prediction of energy levels

Spatial Distributions of Trapping Centers in HfO2/SiO2 Stacked Dielectrics

April 1, 2006
Author(s)
Da-Wei Heh, Eric M. Vogel, J B. Bernstein, Chadwin Yang, George A. Brown, Gennadi Bersuker, Pui-Yee Hung, Alain C. Diebold
An analysis methodology basd on charge pumping (CP) measurement was applied to extract the spatial depth profile of traps in the SiO2/HfO2 gate stacks. This analysis indicates that by changing CP measurement parameters it is possible to probe traps at

The Effect of Stress Induced Anisotropy in Patterned FeCo Thin Film Structures

April 1, 2006
Author(s)
Wonpil Yu, J A. Bain, Willard C. Uhlig, John Unguris
The usage of high moment FeCo alloys in magnetic recording heads can result in stress induced anisotropy due to the high magnetostriction constants of FeCo alloys with 30% to 50% Co. In this work, 1um thick FeCo (65% Fe, 35% Co) sheet films with a Cu

The evaluation of an autosomal SNP 12-plex assay

April 1, 2006
Author(s)
Peter M. Vallone, Amy E. Decker, Michael D. Coble, John M. Butler
SNPs have the potential to play a useful role in human identification testing. Small PCR amplicon sizes associated with SNP typing technologies make SNPs attractive for typing degraded DNA or other low copy number situations. SNP markers can be useful in

The Vapor Pressure of Mercury

April 1, 2006
Author(s)
Marcia L. Huber, Arno D. Laesecke, Daniel G. Friend
In this report, we review the available measurements of the vapor pressure of mercury and develop a new correlation for the vapor pressure of mercury that is valid from the triple point to the critical point. The equation is a Wagner-type form where the

Transport Properties of Argon at Zero Density From Viscosity-Ratio Measurements

April 1, 2006
Author(s)
E May, Michael R. Moldover, Robert F. Berg, John J. Hurly
We determined the zero-density viscosity and thermal conductivity of argon with an uncertainty of only 0.039 % in the temperature range 200 K to 400 K. Our results will improve: (1) the argon-argon interatomic potential, (2) calculated boundary-layer

Determination of Cyanide in Blood by Isotope Dilution Gas Chromatography-Mass Spectrometry

March 31, 2006
Author(s)
Karen E. Murphy, Michele M. Schantz, Therese A. Butler, Bruce A. Benner Jr, Laura J. Wood, Gregory C. Turk
A procedure based on isotope dilution gas chromatography/mass spectrometry (ID GC/MS) has been developed for the accurate and rapid determination of cyanide (CN) in whole blood. A known amount of isotopically labeled potassium cyanide (K13C15N) is added as
Displaying 34451 - 34475 of 73697
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