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Displaying 15601 - 15625 of 74203

Report on the May 2016 ASTM E57.02 instrument runoff at NIST, Part 2 - NIST realization of test procedures and uncertainties in the reference lengths

October 19, 2016
Author(s)
Balasubramanian Muralikrishnan, Prem K. Rachakonda, Katharine M. Shilling, Vincent D. Lee, Christopher J. Blackburn, Daniel S. Sawyer, Geraldine S. Cheok, Luc Cournoyer
There is ongoing activity within ASTM E57.02 working group WK43218 [1] to develop a documentary standard for point-to-point distance performance evaluation of 3D imaging systems. The Dimensional Metrology Group (DMG) at the National Institute of Standards

The Nanolithography Toolbox

October 19, 2016
Author(s)
Krishna Coimbatore Balram, Daron Westly, Marcelo I. Davanco, Karen E. Grutter, Qing Li, Thomas Michels, Christopher H. Ray, Richard Kasica, Christopher B. Wallin, Ian J. Gilbert, Brian A. Bryce, Gregory Simelgor, Juraj Topolancik, Nicolae Lobontiu, Yuxiang Liu, Pavel Neuzil, Vojtech Svatos, Kristen A. Dill, Neal A. Bertrand, Meredith Metzler, Gerald Lopez, David Czaplewski, Leonidas Ocola, Kartik Srinivasan, Samuel Stavis, Vladimir Aksyuk, James Alexander Liddle, Slava Krylov, Robert Ilic
This article describes a platform-independent software package for scripted lithography pattern layout generation and complex processing. The Nanolithography Toolbox, developed at the Center for Nanoscale Science and Technology (CNST) at the National

An Investigation of the Temperature and Strain-Rate Effects on Strain-to-Failure of UHMWPE Fibers

October 18, 2016
Author(s)
Don Jenket II, Amanda L. Forster, Nicholas G. Paulter Jr., Tusit Weerasooriya, Carey A. Gunnarsson, Mohamad Al-Sheikhly
During a ballistic impact, Ultra High Molecular Weight Polyethylene (UHMWPE) fibers are subjected to high temperatures and high strain-rates. Their tensile strength increases with increasing strain-rate and decreases with increasing temperature. To

Influence of Pressure on Glass Formation in a Simulated Polymer Melt

October 18, 2016
Author(s)
Jack F. Douglas, Wensheng Xu, Karl Freed
We investigate the thermodynamic and dynamic properties of a model unentangled glass-forming polymer melt over a wide range of pressures (P) and temperatures (T) using molecular dynamics simulation. We show that the T dependence of the reduced thermal

Origin and Reduction of 1=f Magnetic Flux Noise in Superconducting Devices

October 18, 2016
Author(s)
P Kumar, David P. Pappas, Robert Mcdermott, J.W. Freeland, Clare Yu, M Beck, Hui Wang, Ruqian Wu
Magnetic flux noise is a dominant source of dephasing and energy relaxation in superconducting qubits. The noise power spectral density varies with frequency as 1=f^α, with α ≲ 1, and spans 13 orders of magnitude. Recent work indicates that the noise is

Atomistic Modelling of Scattering Data in the Collaborative Computational Project for Small Angle Scattering (CCP-SAS) 1

October 17, 2016
Author(s)
Stephen J. Perkins, David W. Wright, Hailiang Zhang, Emre H. Brookes, Jianhan Chen, Thomas C. Irving, Susan T. Krueger, David J. Barlow, Karen J. Edler, David J. Scott, Nicholas J. Terrill, Stephen M. King, Paul Butler, Joseph E. Curtis
In solution scattering, the major investment worldwide in multiuser X-ray synchrotrons and neutron sources have resulted in huge advances in the throughput and accuracy of the experimental measurements. Whilst closed-source non-atomistic analytical

Characterization of Emissions from a Non-Ideal Spray Polyurethane Foam Sample

October 17, 2016
Author(s)
Dustin G. Poppendieck, Mengyan Gong, Lauren E. Lawson, Steven J. Emmerich
Many homeowners and government programs are using insulating products, such as SPF, at a growing rateto increase the energy efficiency of their residences and other constructed buildings. Retrofitting or addition of foam insulation in new construction is

Final Report - Characterization of Emissions from Spray Polyurethane Foam

October 17, 2016
Author(s)
Dustin G. Poppendieck, Andrew K. Persily, Steven J. Nabinger
This report summarizes NIST activities under the FY2013 interagency agreement between the Consumer Product Safety Commission (CPSC) and the National Institute of Standards and Technology (NIST). The objective of that agreement is to develop testing and

Flame Retardant Emissions from Spray Polyurethane Foam Insulation

October 17, 2016
Author(s)
Dustin G. Poppendieck, Angelica A. Connor, Matthew P. Schlegel, Adam P. Blickley
The desire to build more energy efficient homes in the United States has led to the expansion of the residential spray polyurethane foam (SPF) insulation industry. Upon application of SPF, reacting chemicals form expanding polyurethane foam that fills

Magnetic microscopy and simulation of strain-mediated control of magnetization in Ni/PMN-PT nanostructures

October 17, 2016
Author(s)
Ian J. Gilbert, Andres C. Chavez, Daniel T. Pierce, John Unguris, Wei-Yang Sun, Cheng-Yen Liang, Gregory P. Carman
Strain-mediated thin film multiferroics comprising piezoelectric/ferromagnetic heterostructures enable the electrical manipulation of magnetization with much greater efficiency than other methods; however, the investigation of nanostructures fabricated

The PROSPECT Physics Program

October 17, 2016
Author(s)
Hans P. Mumm, Michael P. Mendenhall
The Precision Reactor Oscillation and Spectrum Experiment, PROSPECT, is designed to make a precise measurement of the antineutrino spectrum from a highly-enriched uranium reactor and probe eV-scale sterile neutrinos by searching for neutrino oscillations

Lessons Learned from Spray Polyurethane Foam Emission Testing using Micro-chambers

October 16, 2016
Author(s)
Dustin Poppendieck, Mengyan Gong, Lauren E. Lawson
Both governmental agencies and the SPF industry consortium have sought more information on potential chemical emissions from SPF to better understand any potential occupant exposures and health impacts. This research was designed to contribute to the

NIST Mini-Kolsky Bar: Historical Review

October 16, 2016
Author(s)
Dick Rhorer, Steven P. Mates, Jae Hyun Kim
The Society for Experimental Mechanics (SEM) has sponsored a series of technical paper sessions titled "Novel Testing Techniques" at their annual meetings. These sessions were organized by the Dynamic Material Properties Technical Division of SEM and

Non-equilibrium Transport of Light

October 16, 2016
Author(s)
Jacob M. Taylor, Chiao-Hsuan Wang
Understanding the behavior of light in non-equilibrium scenarios underpins much of quantum optics and optical physics. While lasers provide a severe example of a non-equilibrium problem, recent interests in the near-equilibrium physics of photon `gases'

Stochastic Single Flux Quantum Neuromorphic Computing using Magnetically Tunable Josephson Junctions

October 16, 2016
Author(s)
Stephen E. Russek, Christine A. Donnelly, Michael Schneider, Burm Baek, Matthew Pufall, William Rippard, Pete Hopkins, Paul Dresselhaus, Samuel P. Benz
Abstract— Single flux quantum (SFQ) circuits form a natural neuromorphic technology with SFQ pulses and superconducting transmission lines simulating action potentials and axons, respectively. Here we present a new component, magnetic Josephson junctions

Avian mercury exposure and toxicological risk across western North America: a synthesis

October 15, 2016
Author(s)
Joshua T. Ackerman, Collin A. Eagles-Smith, Mark P. Herzog, Alex Hartman, Sarah Peterson, David C. Evers, Allyson Jackson, John E. Elliott, Stacy Schuur, Colleen E. Bryan Sallee
Methylmercury contamination of the environment is an important issue globally and birds are useful bioindicators for mercury monitoring programs. We synthesized all of the available data on mercury contamination of birds in western North America. We

Mercury Risk to Avian Piscivores across the Western United States and Canada

October 15, 2016
Author(s)
Allyson Jackson, David C. Evers, Collin A. Eagles-Smith, Joshua T. Ackerman, James J. Willacker, John E. Elliott, Stacy Schuur, Colleen E. Bryan Sallee
As part of the Western North America Mercury Synthesis, we evaluated risk to avian piscivores across all or parts of their breeding range through the compilation of fish and bird tissue mercury (Hg) concentrations for western United States and Canada. We

The Algebra of Systems and System Interactions with an application to Smart Grid

October 14, 2016
Author(s)
Charif Mahmoudi, Hasnae Bilil, Edward R. Griffor
Systems are integrations of devices or component elements and even other systems. The notion of a system comprehends engineered and biological or mechanical or physical systems. Examples include information and dynamical systems as well as integrations of
Displaying 15601 - 15625 of 74203
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