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Search Publications

NIST Authors in Bold

Displaying 28351 - 28375 of 73929

Comparison of the Josephson Voltage Standards of the NIST and the BIPM

July 1, 2009
Author(s)
Stephane Solve, Regis Chayramy, Michael Stock, Yi-hua D. Tang, June E. Sims
A comparison of the 10 V Josephson array voltage standard of the Bureau International des Poids et Mesures (BIPM) was made with that of the National Institute of Standards and Technology (NIST), USA, in March 2009. The results are in very good agreement

Crack tip opening angle: applications and developments in the pipeline industry

July 1, 2009
Author(s)
Elizabeth S. Drexler, Philippe Darcis, Richard J. Fields, Joseph D. McColskey, Christopher N. McCowan, Roni Reuven, Thomas A. Siewert
One of the most difficult safety problems associated with gas pipeline to be solved is the control of ductile fracture propagation. To address this issue, the crack tip opening angle (CTOA) criterion is becoming one of the more widely accepted properties

Depressed Phase Transition in Solution-Grown VO2 Nanostructures

July 1, 2009
Author(s)
Daniel A. Fischer, Luisa Whittaker, Cherno Jaye, Zugen Fu, Sarbajit Banerjee
The first-order metal insulator phase transition in VO2 is characterized by an ultrafast several orders of magnitude change in electrical conductivity and optical transmittance, which makes this material an attractive candidate for the fabrication of

Design of the DEMO Fusion Reactor Following ITER

July 1, 2009
Author(s)
Geoffrey B. McFadden, Paul R. Garabedian
Runs of the NSTAB equilibrium and stability code show there are many 3D solutions of the advanced tokamak problem subject to axially symmetric boundary conditions. These numerical simulations based on mathematical equations in conservation form predict

Direct Measurement of Association and Dissociation Rates of DNA Binding in Live Cells by Fluorescence Correlation Spectroscopy

July 1, 2009
Author(s)
Ariel Michelman-Ribeiro, Davide Mazza, Tilman Rosales, Timothy J. Stasevich, Boukari Hacene, Vikas Rishi, Charles Vinson, Jay R. Knutson, James G. NcNally
Measurement of live-cell binding interactions is vital for understanding the biochemical reactions that drive cellular processes. Here we develop, characterize and apply a new procedure to extract information about binding to an immobile substrate from FCS

Economics of Measurement Uncertainty and Tolerances

July 1, 2009
Author(s)
Steven D. Phillips, J.M. Baldwin, William T. Estler
Productivity is considered by considering Cobb-Douglas production function and focusing on total factor productivity (TFP). We argue that developed economies like the United States need to develop TFP by utilizing advances in computation power and insights

Fundamental constants and tests of theory in Rydberg states of hydrogenlike ions

July 1, 2009
Author(s)
Ulrich D. Jentschura, Peter Mohr, Joseph N. Tan, Benedikt J. Wundt
A comparison of precision frequency measurements to quantum electrodynamic (QED) theoretical predictions can be used to test theory and to obtain information regarding fundamental constants. We find that for Rydberg states, theoretical uncertainties due to

Magnetocorrosion Of Pipeline Steel

July 1, 2009
Author(s)
Angelique N. Lasseigne
The effects of magnetocorrosion, altered corrosion behavior in the presence of magnetic fields, are described for pipeline steels. Changes in corrosion behavior, including pitting, cracking, and hydrogen ingress, were assessed with and without an applied

Middleware and Metrology for the Pervasive Future

July 1, 2009
Author(s)
Antoine Fillinger, Imad Hamchi, Stephane Degre, Lukas L. Diduch, Richard T. Rose, Jonathan G. Fiscus, Vincent M. Stanford
Using data streams from acoustic, video, proximity, location, and even physiological sensors, to recognize user intent and respond appropriately is one of the grand challenges to the multimodal research community. We describe our sensor-net middleware, the

Sensitivities and Variances for Fitted Parameters of Spheres

July 1, 2009
Author(s)
Christoph J. Witzgall, Marek Franaszek
Experimental data have been gathered by applying 3D imaging systems, such as LIDAR/LADAR instruments, to spherical objects. This report provides a compilation of the statistical and analytical procedures to be used for an evaluation, to be reported

Supplementary Backward Equations v(p, T) for the Critical and Supercritical Regions (Region 3) of the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam

July 1, 2009
Author(s)
H J. Kretzschmar, Allan H. Harvey, K Knobloch, Radim Mares, Kiyoshi Miyagawa, N Okita, Roland Span, I. Stocker, Wolfgang Wagner, I Weber
When steam power cycles are modeled, thermodynamic properties as functions of pressure and temperature are required in the critical and supercritical regions (region 3 of IAPWS-IF97). With IAPWS-IF97, such calculations require cumbersome iterative

The 2008 NCSLi Josephson Voltage Standards Interlaboratory Comparison

July 1, 2009
Author(s)
Harold V. Parks, William B. Miller, Leonard P. Pardo, Curtis Kiser, Clark A. Hamilton, Yi-hua D. Tang, Barry M. Wood
Josephson voltage standards (JVS) provide a highly accurate representation of the volt. Although the Josephson Effect provides an intrinsic standard of voltage, inter-comparisons between different systems are important to insure that potential sources of

Uncertainty Analysis of a Simple Fringe Projection System

July 1, 2009
Author(s)
Shawn P. Moylan, Gregory W. Vogl
Fringe projection is an optical method of measuring the surface profile of a part. Most basic fringe projection processes require an initial calibration step to determine components of coordinate transformation matrices before the surface point coordinates

Improved Isotopic Analysis With a Large Array of Gamma-Ray Microcalorimeters

June 30, 2009
Author(s)
Nikhil Jethava, Joel N. Ullom, Douglas A. Bennett, William B. Doriese, James A. Beall, Gene C. Hilton, Robert D. Horansky, Kent D. Irwin, Eric Sassi, Leila R. Vale, Minesh K. Bacrania, Andrew Hoover, P. J. Karpius, Michael W. Rabin, Clifford R. Rudy, Duc T. Vo
We present results from the largest array of gamma-ray microcalorimeters operated to date. The microcalorimeters consist of Mo/Cu transition-edge sensors with attached Sn absorbers. The detector array contains 66 pixels each with an active area 2.25 mm 2

Improved Isotopic Analysis with a Large Array of Gamma-ray Microcalorimeters

June 30, 2009
Author(s)
Nikhil Jethava, Joel N. Ullom, Douglas A. Bennett, William B. Doriese, James A. Beall, Gene C. Hilton, Robert D. Horansky, Kent D. Irwin, Eric Sassi
We present results from the largest array of gamma-ray microcalorimeters operated to date. The microcalorimeters consist of Mo/Cu transition-edge sensors with attached Sn absorbers. The detector array contains 66 pixels each with an active area 2.25 mm2

Laboratory Recognition Process for Project 25 Compliance Assessment

June 30, 2009
Author(s)
Kurt Fischer, Andrew P. Thiessen
Project 25 (P25) is a standards development process for the design, manufacture and evaluation of interoperable digital two-way wireless communications products created by and for public safety professionals. The published P25 standards suite is

Robots to the Rescue

June 30, 2009
Author(s)
Elena R. Messina
Despite current limitations, robots can still play a significant role in helping the response community by being their eyes and ears in dangerous, unknown, or difficult-to-access locations. This article describes how the National Institute of Standards and
Displaying 28351 - 28375 of 73929
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