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Search Publications

NIST Authors in Bold

Displaying 15351 - 15375 of 73697

Interaction of aerosol particle with a standing wave optical field

September 16, 2016
Author(s)
John J. Curry
Trajectories of spherical dielectric particles carried across an optical standing wave by a flowing medium areinvestigated. Trajectories are determined by a three-dimensional Monte Carlo calculation that includes drag forces, Brownian motion, and optical

Spin Transport at Interfaces with Spin-orbit Coupling: Formalism

September 16, 2016
Author(s)
Vivek P. Amin, Mark D. Stiles
Spin transport remains poorly understood in multilayer systems with interfacial spin-orbit coupling. Currently, drift-diffusion models cannot accurately treat this phenomenon, since the important consequences of interfacial spin-orbit scattering remain

Spin Transport at Interfaces with Spin-Orbit Coupling: Phenomenology

September 16, 2016
Author(s)
Mark D. Stiles, Vivek P. Amin
Spin transport remains poorly understood in multilayer systems with interfacial spin-orbit coupling. While the important consequences of interfacial spin-orbit scattering can be captured by a spin-dependent Boltzmann equation, currently they cannot be

X-ray Powder Diffraction Reference Patterns for Bi1-xPbxOCuSe

September 16, 2016
Author(s)
Winnie K. Wong-Ng, Yonggao Yan, James A. Kaduk, Xinfeng Tang
The structures and powder X-ray reference diffraction patterns of the ‘natural superlattice’ series Bi1-xPbxOCuSe (x=0, 0.02, 0.04, 0.06, 0.08 and 0.1) have been investigated. As the ionic radius of Pb2+ is greater than that of Bi3+, the unit cell volume

Application of the advanced distillation curve method for the characterization of two alternative transportation fuels prepared from the pyrolysis of polyethylene bags*

September 15, 2016
Author(s)
Thomas J. Bruno, Megan E. Harries, B. K. Sharma, Bidhya Kunwar
The properties of alternative fuels must be evaluated to determine their suitability for use in existing engines, either as blends with conventional petroleum products or as stand-alone substitutions (that is, drop in replacements). Alternative fuels made

Code-division-multiplexed readout of large arrays of TES microcalorimeters

September 15, 2016
Author(s)
Kelsey M. Morgan, Bradley K. Alpert, Douglas A. Bennett, William B. Doriese, Joseph W. Fowler, Johnathon D. Gard, Gene C. Hilton, Kent D. Irwin, Young Il Joe, Galen C. O'Neil, Carl D. Reintsema, Edward V. Denison, Daniel R. Schmidt, Joel N. Ullom, Daniel S. Swetz
Code-division multiplexing (CDM) offers a path to reading out large arrays of transition edge sensor (TES) X-ray micro-calorimeters with excellent energy and timing resolution. We demonstrate the readout of X-ray TESs with a 32-channel flux-summed code

Comparison of Registration Methods for Mobile Manipulators

September 15, 2016
Author(s)
Roger V. Bostelman, Roger Eastman, Tsai H. Hong, Omar Aboul-Enein, Steven A. Legowik, Sebti Foufou
Mobile manipulators can be effective, efficient and flexible for automation on the factory floor but will need safety and performance standards for wide adoption. This paper looks at a specific area of performance standards [1] for docking and workpiece

Film morphology evolution during solvent vapor annealing of highly efficient small molecule donor/acceptor blends

September 15, 2016
Author(s)
Sebastian Engmann, Hyun W. Ro, Andrew Herzing, Chad R. Snyder, Lee J. Richter, Paul Geraghty, David Jones
Solution-processable small molecule photovoltaics based on the novel molecular donor, benzodithiophene terthiophene rhodamine (BTR), recently have shown maximum power conversion efficiencies above 8% for active layer thicknesses up to 400 nm, using post

HIV-1 Matrix-31 Membrane Binding Peptide Interacts Differently with Membranes Containing PS vs. PI(4,5)P 2

September 15, 2016
Author(s)
Lauren O'Neil, Kathryn Andenoro, Isabella Pagano, Laura Carroll, Leah Langer, Zachary Dell, Davina Perera, Bradley W. Treece, Frank Heinrich, Mathias Loesche, John F. Nagle, Stephanie Tristram-Nagle
Efficient assembly of HIV-1 at the plasma membrane (PM) of the T-cell specifically requires PI(4,5)P 2. It was previously shown that a highly basic region (HBR) of the matric protein (MA) on the Gag precursor polyprotein Pr55^gag^ is required membrane

NIST Programs to Advance Accurate, Internationally-Recognized Stack Emissions Measurements

September 15, 2016
Author(s)
Aaron Johnson, Iosif Isaakovich Shinder, Rodney A. Bryant, JohnPaul R. Abbott, Keith A. Gillis, Joey Boyd, James Filla, Michael R. Moldover
Accurate flow measurements are essential to quantify the amount of greenhouse gases (GHGs) and other pollutants emitted from power plant stacks. Although protocols have been developed, the uncertainty of stack flow measurements has not been documented. 

Thermodynamics of Cottrell atmospheres tested by atomistic simulations

September 15, 2016
Author(s)
Yuri Mishin, John W. Cahn
Solute atoms can segregate to elastically deformed lattice regions around a dislocation and form an equilibrium distribution called the Cottrell atmosphere. We compare two approaches to describe Cottrell atmospheres. In the Eshelby theory, the solid

A pseudo-3D model to investigate heat and water transport in large area PEM fuel cells - Part 2: Application on an automotive driving cycle

September 14, 2016
Author(s)
Daniel S. Hussey, J-P Poirot-Crouvezier, M. Chandesris, S. Rosini, David L. Jacobson, Jacob M. LaManna, A. Morin, Y. Bultel
In this work, the pseudo-3D multiphysics model introduced in Part 1 of this two-part series of papers is used to investigate heat and water transport in a proton exchange membrane fuel cell designed for an automotive application. The main advantage of the

Characterizing Indoor Air Quality Performance Using a Graphical Approach

September 14, 2016
Author(s)
Kevin Y. Teichman, Andrew Persily, Steven Emmerich
In this paper, we describe and demonstrate an approach to illustrate the performance of buildings with respect to indoor air quality (IAQ). In the absence of an adequate or agreed-upon IAQ metric(s), we describe a graphical approach to presenting IAQ

Editorial: Special Issue on Industrial Robot Agility

September 14, 2016
Author(s)
Craig I. Schlenoff, Stephen B. Balakirsky, Murad Kurwa
The robotic systems of tomorrow need to be capable, flexible, and agile. These systems need to perform their duties at least as well as human counterparts, be quickly re-tasked to other operations, and cope with a wide variety of unexpected environmental

Grover search and the no-signaling principle

September 14, 2016
Author(s)
Ning Bao, Bouland Adam, Stephen P. Jordan
From an information processing point of view, two of the key properties of quantum physics are the no-signaling principle and the Grover search lower bound. That is, despite admitting stronger-than-classical correlations, quantum mechanics does not imply

Interfacial Symmetry Control of Emergent Ferromagnetism at the Nanoscale

September 14, 2016
Author(s)
Alexander J. Grutter, A. Vailionis, Julie A. Borchers, Brian J. Kirby, C. L. Flint, C. He, E. Arenholz, Y. Suzuki
We demonstrate tunable switching between ferromagnetic and antiferromagnetic order at the CaRuO 3/CaMnO 3 interface that originates from symmetry differences in the tilt and rotation of the oxygen octahedra across the boundary. Interfaces which are

NIST Electron Elastic-Scattering Cross-Section Database, Version 4.0

September 14, 2016
Author(s)
Cedric J. Powell, Aleksander Jablonski, Francesc Salvat, Angela Y. Lee
Version 4.0 of this database (SRD 64) provides values of differential elastic-scattering cross sections, total elastic-scattering cross sections, phase shifts, and transport cross sections for elements with atomic numbers from 1 to 96 and for electron

Polymorphism in the 1:1 Charge-Transfer Complex DBTTF-TCNQ and Its Effects on Optical and Electronic Properties

September 14, 2016
Author(s)
Katelyn Goetz, Jun?ya Tsutsumi, Sujitra Pookpanratana, Jihua Chen, Curt A. Richter, Christina Hacker, Tatsuo Hasegawa, Oana Jurchescu
The organic charge-transfer (CT) complex dibenzotetrathiafulvalene - 7,7,8,8-tetracyanoquinodimethane (DBTTF-TCNQ) is found to crystallize in two polymorphs when grown by physical vapor transport: the known α-polymorph and a new structure, the β-polymorph

Aspect-ratio driven evolution of high-order resonant modes and near-field distributions in localized surface phonon polariton nanostructures

September 13, 2016
Author(s)
Joseph G. Tischler, Chase T. Ellis, Orest Glembocki, Francisco Bezares, Alexander Giles, Richard Kasica, Loretta Shirley, Jeffrey C. Owrutsky, Dmitry Chigrin, Joshua Caldwell
Polar dielectrics have garnered much attention as an alternative to plasmonic metals in the mid- to long-wave infrared spectral regime due to their low optical losses. As such, nanoscale resonators composed of these materials demonstrate figures of merit
Displaying 15351 - 15375 of 73697
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