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NIST Authors in Bold

Displaying 9326 - 9350 of 73751

Ceramic Materials and Powder Diffraction

September 15, 2019
Author(s)
Winnie K. Wong-Ng
Contrary to general public’s perception of ceramics as primarily encompassing art work, table ware, porcelain enamels, tiles, and sanitary ware, ceramics cover a broad range of materials and applications. We have attempted to categorize these materials in

Dual Cavity Refractivity measurements using a single Laser

September 15, 2019
Author(s)
Kevin O. Douglass, Jacob Edmond Ricker, Stephen Eckel, Jay H. Hendricks
We present a method for measuring refractivity-based pressure changes using a dual Fabry-Perot cavity utilizing a single laser with off-set sideband locking to the second cavity. Preliminary data illustrate the utility of the technique.

Experimental and numerical study of multi-phase medium-Mn TWIP-TRIP steel: influences of strain rate and phase constituents

September 15, 2019
Author(s)
William E. Luecke, Y. Liu, Jake Benzing, X. Zhang, A. Dutta, D. Ponge, C. Oksay, D. Raabe, J.E. Wittig
The present work investigates the room temperature tensile properties of a Fe-12Mn-3Al-0.05C (weight %) twinning- and transformation-induced plasticity (TWIP-TRIP) steel from quasi-static to low-dynamic strain rates ( ̇ = 10-4 /s to  ̇ = 102 /s). The

Experimental Variation of Magnification Calibration for Localization Microscopy

September 15, 2019
Author(s)
Craig R. Copeland, Bojan R. Ilic, Samuel M. Stavis
We study the experimental variation of a localization microscope due to temporal and thermal factors, enabling elucidation of the discrepancy between transillumination brightfield and epi-illumination fluorescence of an aperture array for magnification

Indistinguishable photons from deterministically integrated single quantum dots in heterogeneous GaAs/Si3N4 quantum photonic circuits

September 15, 2019
Author(s)
Peter Schnauber, Anshuman Singh, Johannes Schall, Suk I. Park, Jin Dong Song, Sven Rodt, Kartik Srinivasan, Stephan Reitzenstein, Marcelo I. Davanco
With in-situ electron beam lithography we deterministically integrate single InAs quantum dots into heterogeneous GaAs/Si3N4 waveguide circuits. Through microphotoluminescence spectroscopy, we show on-chip quantum dot emission of single, postselected

John Werner Cahn

September 15, 2019
Author(s)
William J. Boettinger, C A. Handwerker, Frank W. Gayle
John Werner Cahn, retired Senior Fellow of the National Institute of Standards and Technology (NIST), died in Seattle, WA on March 14, 2016 at age 88. After distinguished careers at General Electric in Schenectady, N.Y. (1954-1964) and at MIT (1964-1978)

Molecular Partitioning in Ternary Solutions of Cellulose

September 15, 2019
Author(s)
Xin Zhang, Yimin NMN Mao, Madhu Sudan Tyagi, Feng Jiang, Doug Henderson, Bo Jiang, Zhiwei Lin, Ronald L. Jones, Liangbing Hu, Robert M. Briber, Howard Wang
Scattering measurements on the structure and dynamics of ternary solutions from dissolving microcrystalline cellulose (MC) in mixtures of ionic liquid (IL) and polar organic solvent have revealed dissolved cellulose molecular coils and partitioning of IL

The 2018 NIST Speaker Recognition Evaluation

September 15, 2019
Author(s)
Omid Sadjadi, Craig Greenberg, Elliot Singer, Douglas A. Reynolds, Lisa Mason, Jaime Hernandez-Cordero
In 2018, the U.S. national institute of standards and technology (NIST) conducted the most recent in an ongoing series of speaker recognition evaluations (SRE). SRE18 was organized in a similar manner to SRE16, focusing on speaker detection over

Effect of Oxygen Stoichiometry on the Magnetization Profiles and Negative Magnetization in LSMO Thin Films

September 14, 2019
Author(s)
Robbyn Trappen, Alexander Grutter, Chih-Yeh Huang, Aubrey Penn, Navid Mottaghi, Saeed Yousefi, Allison Haertter, Shalini Kumari, James LeBeau, Brian Kirby, Mikel B. Holcomb
The depth dependent magnetization in thin film oxygen stoichiometric and oxygen deficient La 0.7Sr 0.3MnO 3 is investigated by using polarized neutron reflectivity. The stoichiometric sample shows enhanced interfacial magnetization relative to the rest of

Assessment of Radiation Solver of Fire Simulation Models Using RADNNET-ZM

September 13, 2019
Author(s)
Wai Cheong Tam, Walter W. Yuen
The paper presents a neural-network based zonal method (RADNNET-ZM) for the analysis of radiative heat transfer in an arbitrary Cartesian enclosure with an isothermal, inhomogeneous, non-gray medium. The model accounts for the non-gray effect of absorbing

Automated Mechanical Exfoliation of MoS2 and MoTe2 Layers for 2D Materials Applications

September 13, 2019
Author(s)
Albert Davydov, Sergiy Krylyuk, Kyle J. DiCamillo, Makarand Paranjape, Wendy Shi
An automated technique is presented for mechanically exfoliating single-layer and few-layer transition metal dichalcogenides using controlled shear and normal forces imposed by a parallel plate rheometer. A thin sample that is removed from bulk MoS2 or

Face Recognition Vendor Test (FRVT) Part 2: Identification

September 13, 2019
Author(s)
Patrick Grother, Mei Ngan, Kayee Hanaoka
This report updates and extends NIST Interagency Report 8238, documenting performance of new face recognition algorithms submitted for evaluation to NIST in November 2018. The algorithms implement one-to-many identification of faces appearing in two-

HEXRD Measurement of Strain and Dislocation Density ahead of Crack Tips Grown in Hydrogen

September 13, 2019
Author(s)
Matthew J. Connolly, May L. Martin, Peter E. Bradley, Damian S. Lauria, Andrew J. Slifka, Jun Sang Park, Robert Amaro
The deformation fields near fatigue crack tips grown in hydrogen and in air were measured using high-energy x-ray diffraction. A larger magnitude of elastic strain was observed in the hydrogen case compared to the air case. The magnitude of elastic strain

On Correlating Mixed Forest Fuel Bed Fire Spread Data

September 13, 2019
Author(s)
Jiann C. Yang
Mixing rules are proposed and used to correlate well-mixed forest fuel bed fire spread data from the literature using the dimensionless correlations previously developed for single-species forest fuel bed fire spread with the help of dimensional analysis

System Level Evaluation of UE-to-Network Relays in D2D-enabled LTE Networks

September 13, 2019
Author(s)
Samantha M. Gamboa Quintiliani, Raghav Thanigaivel, Richard A. Rouil
The 3rd Generation Partnership Program (3GPP) introduced UE-to-Network Relays in Long Term Evolution (LTE) Release 13. This technology leverages Proximity Services (ProSe), i.e., the LTE Device-to-device (D2D) communication functionality, to provide user

Thin Filament Pyrometry Field Measurements in a Medium-Scale Pool Fire.

September 13, 2019
Author(s)
Zhigang Wang, Andy Tam, Jian Chen, Ki Y. Lee, Anthony Hamins
This paper presents the development of a thin filament pyrometry method to characterize the time- varying temperature field in a medium-scale pool fire in a quiescent environment. A digital camera with optical filters and zoom lens was used to record the

A photonic pH sensor based on photothermal spectroscopy

September 12, 2019
Author(s)
Zeeshan Ahmed, Nathan J. Castro, Matthew R. Hartings
Although the determination of pH is a standard laboratory measurement, new techniques capable of measuring pH are being developed to facilitate modern technological advances. Bio-industrial processing, tissue engineering, and intracellular environments

Global alignment of solution-based single-wall carbon nanotube films via machine-vision controlled filtration

September 11, 2019
Author(s)
Jeffrey A. Fagan, Angela R. Hight Walker, Adam J. Biacchi, Joshua S. Walker, William D. Rice, Thomas Searles, Valerie A. Kuehl
Over the past decade, substantial progress has been made in the chemical processing (chiral enrichment, length sorting, handedness selectivity, and filling substance) of single- wall carbon nanotubes (SWCNTs). Recently, it was shown that large
Displaying 9326 - 9350 of 73751
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