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Displaying 7826 - 7850 of 73741

Measurements and Modeling of Spherical CH2F2-Air Flames

July 27, 2020
Author(s)
Michael J. Hegetschweiler, John L. Pagliaro, Lukas Berger, Raik Hesse, Joachim Beeckmann, Heinz Pitsch, Gregory T. Linteris
The burning velocity of mixtures of the refrigerant R-32 (CH2F2) with air over a range of equivalence ratios are studied via spherically expanding flames SEFs in a large, optically accessible spherical chamber at constant pressure. Shadowgraph images from

Overview of the TREC 2019 Deep Learning Track

July 27, 2020
Author(s)
Ellen Voorhees, Nick Craswell, Bhaskar Mitra, Daniel Campos, Emine Yilmaz
The Deep Learning Track is a new track for TREC 2019, with the goal of studying ad hoc ranking in a large data regime. It is the first track with large human-labeled training sets, introducing two sets corresponding to two tasks, each with rigorous TREC

Broadband detection of multiple spin and orbital angular momenta via dielectric metasurface

July 26, 2020
Author(s)
Si Zhang, Pengcheng Huo, Wenqi Zhu, Cheng Zhang, Peng Chen, Mingze Liu, Lu Chen, Henri Lezec, Amit Agrawal, Yanqing Lu, Ting Xu
Light beams carrying spin angular momentum (SAM) and orbital angular momentum (OAM) have created novel opportunities in the areas of optical communications, imaging, micromanipulation and quantum optics. However, complex optical setups are required to

Deterministic Intra-Vehicle Communications: Timing and Synchronization

July 26, 2020
Author(s)
Hamid Gharavi
As we power through to the future, in-vehicle communications' reliance on speed is becoming a challenging predicament. This is mainly due to the ever-increasing number of electronic control units (ECUs), which will continue to drain network capacity, hence

The Status of Thermodynamic Data and Models for CF3I and its Mixtures

July 24, 2020
Author(s)
Ian H. Bell, Mark O. McLinden
There is a renewed interest in the use of the refrigerant CF3I for refrigeration and air conditioning applications, driven by its low global warming potential (equivalent to CO2), and very low (but nonzero) ozone depletion potential. In this paper we will

Crystallographic Polarity Measurements in Two-Terminal GaN Nanowire Devices by Lateral Piezoresponse Force Microscopy

July 23, 2020
Author(s)
Matthew Brubaker, Alexana Roshko, Samuel Berweger, Paul T. Blanchard, Todd E. Harvey, Norman A. Sanford, Kristine Bertness
Lateral piezoresponse force microscopy (L-PFM) is demonstrated as a reliable method for determining the crystallographic polarity of individual, dispersed GaN nanowires that were functional components in electrical test structures. In contrast to PFM

Evacuation Decision-Making in the 2016 Chimney Tops 2 Fire: Results of a Household Survey

July 23, 2020
Author(s)
Emily H. Walpole, Erica D. Kuligowski, Lauren B. Cain, Alicea N. Fitzpatrick, Christin Salley
To gain insight into the emergency communication and evacuation decision-making surrounding the 2016 Chimney Tops 2 fire, NIST conducted (via a small business survey research contractor) an online survey targeting homeowners in the Gatlinburg, TN area from

Experimental and Theoretical Evidence of Hydrogen Doping in Solution Processed Indium Gallium Oxide via Polymer Incorporation

July 23, 2020
Author(s)
Wei Huang, Joshua Tedesco, Po-Hsiu Chien, Kyle McMillen, Li Zeng, Subhrangsu Mukherjee, Binghao Wang, Yao Chen, Gang Wang, Yang Wang, Yanshan Gao, Michael Bedzyk, Dean DeLongchamp, Julia E. Medvedeva, Yan-Yan Hu, Tobin Marks, Antonio Facchetti
Aqueous solution processed high performance indium gallium oxide (IGO) thin-film transistors (TFTs) are realized by the simple addition of a hydroxyl (C-OH) containing polymer [polyvinyl alcohol (PVA)] into an IGO precursor solution. The field-effect

Importance of Sub-Nanosecond Fluctuations on the Toughness of Polycarbonate Glasses

July 23, 2020
Author(s)
Christopher L. Soles, Kanae N. Ito, Adam B. Burns, Edwin P. Chan, Robert M. Dimeo, Madhu Sudan Tyagi, Albert F. Yee, Jianwei Liu
This article explores the relationship between the nano- to picosecond dynamics, as quantified by elastic incoherent neutron scattering, in polycarbonate (PC) glasses with their mechanical toughness. We establish a robust correlation between mechanical

Structure Vulnerability to Firebrands from Fences and Mulch

July 23, 2020
Author(s)
Kathryn M. Butler, Erik L. Johnsson, Wei Tang
Fences and mulch contribute to the spread of WUI fires. They act as both ignition targets and as sources that may themselves ignite nearby objects through direct flame contact and firebrand generation. The linear nature of fences gives them the capability

Atom Probe Mass Spectrometry of Uranium Isotopic Reference Materials

July 22, 2020
Author(s)
Frederick Meisenkothen, Mark McLean, Irina Kalish, Daniel V. Samarov, Eric B. Steel
Atom probe tomography (APT) has the highest spatial resolution of any mass spectrometry technique, permitting chemically and isotopically resolved images to be recorded at near-atomic length scales. The technique also has a combined ionization efficiency

Crystallography, Morphology, Electronic Structure, and Transport in Non-Fullerene/Non-Indacenodithienothiophene Polymer:Y6 Solar Cells

July 22, 2020
Author(s)
Weigang Zhu, Subhrangsu Mukherjee, Joaquin Alzola, Vinod K. Sangwan, Samuel H. Amsterdam, Steven M. Swick, Leighton Jones, Michael Heiber, Guoping Li, Kevin L. Kohlstedt, Charlotte Stern, Dean DeLongchamp, Mark C. Hersam, George C. Schatz, Michael R. Wasielewski, Antonio Facchetti, Andrew Herzing, Lin Chen, Tobin Marks
Emerging nonfullerene acceptors (NFAs) with crystalline domains enable high-performance bulk heterojunction (BHJ) solar cells. Thermal annealing is known to enhance the BHJ photoactive layer morphology and performance. However, the microscopic mechanism of

Nanophotonic tantala waveguides for supercontinuum generation pumped at 1560 nm

July 22, 2020
Author(s)
Kieran F. LaMee, David Carlson, Zachary Newman, Su P. Yu, Scott Papp
We experimentally demonstrate efficient and broadband supercontinuum generation in nonlinear tantala (Ta2O5) waveguides using a 1560 nm femtosecond seed laser. With incident pulse energies as low as 100 pJ, we create spectra spanning up to 1.6 octaves

Principal Component Analysis for Automated Classification of 2D Spectra and Interferograms of Protein Therapeutics: Influence of Noise, Reconstruction Details, and Data Preparation

July 22, 2020
Author(s)
Robert Brinson, Wade Elliott, Luke Arbogast, David Sheen, John Giddens, John Marino, Frank Delaglio
Protein therapeutics must retain their proper three-dimensional fold without forming aggregates for safe and effective use in the clinic. Therefore, the ability to monitor protein higher order structure (HOS) can be valuable throughout the lifecycle of a
Displaying 7826 - 7850 of 73741
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