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NIST Authors in Bold

Displaying 28126 - 28150 of 73697

Optimization and Multi-Hazard Design

July 6, 2009
Author(s)
Emil Simiu, Florian A. Potra
There is a growing interest in the development of procedures for the design of structures exposed to multiple hazards. The goal is to achieve safer and/or more economical designs than would be the case if the structures were analyzed independently for each

Using the nonlinear Schroedinger equation for precision optical measurements

July 6, 2009
Author(s)
Nathan R. Newbury, Esther Baumann, Ian R. Coddington, Fabrizio R. Giorgetta, William C. Swann
Frequency combs produce light that is both broadband and highly coherent. However, their operation relies on the nonlinear Schroedinger equation, in particular to achieve the broad spectral output. Because it is a highly nonlinear system, this comb output

Comprehensive Evaluation of AIMS Texture, Angularity, and Dimension Measurements

July 3, 2009
Author(s)
Enad M. Mahmoud, Leslie L. Gates, Eyad A. Masad, Sinan T. Erdogan, Edward Garboczi
Aggregates are the most widely used construction materials in the world in structures built from both asphaltic and portland cement concrete composites. The performance of these composites is affected by aggregate shape characteristics (e.g., angularity

Microscale Polymer-Nanotube Composites

July 2, 2009
Author(s)
Erik K. Hobbie, Jeffrey A. Fagan, Jan Obrzut, Steven D. Hudson
Microscopic polymer colloids with an interfacial coating of purified single-wall carbon nanotubes (SWCNTs) have been synthesized from length and type sorted SWCNTs. Aqueous SWNCT suspensions sorted through density-gradient ultracentrifugation are used to

Certification Report for SRM 2112 and 2113

July 1, 2009
Author(s)
Christopher N. McCowan
This report documents the procedures used to develop certified maximum force and absorbed energy values for SRM 2112 and SRM 2113. The report serves to provide outside observers with accurate and detailed information on how the materials were certified and

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
Displaying 28126 - 28150 of 73697
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