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NIST Authors in Bold

Displaying 5201 - 5225 of 74359

Substrate-mediated hyperbolic phonon polaritons in MoO3

February 15, 2021
Author(s)
Jeffrey Schwartz, Son T. Le, Sergiy Krylyuk, Curt A. Richter, Albert Davydov, Andrea Centrone
Hyperbolic phonon polaritons (HPhPs) are hybrid excitations of light and coherent charge oscillations that exist in strongly optically anisotropic, two-dimensional materials (e.g., MoO3). These polaritons propagate through the material's volume with long

Micromechanical Behaviorof Multilayered Ti/Nb Composites Processed by Accumulative Roll Bonding: An in-situ Synchrotron X-ray Diffraction Investigation

February 14, 2021
Author(s)
S. Jiang, R. L. Peng, Z. Hegedus, Thomas Gnaupel-Herold, J. J. Moverare, U. Lienert, F. Fang, X. Zhao, L. Zuo, N. Jia
Ti/Nb multilayered composites were fabricated by accumulative roll bonding (ARB). With increasing ARB cycles, shear bands become predominant in the continuously strengthened composites. The correlation between micromechanical behavior and mechanical

Note: A Bitter-type electromagnet for complex atomic trapping and manipulation

February 12, 2021
Author(s)
Jacob L. Siegel, Daniel Barker, James A. Fedchak, Julia Scherschligt, Stephen Eckel
We create a pair of symmetric Bitter-type electromagnet assemblies capable of producing multiple field configurations including uniform magnetic fields, spherical quadruple traps, or Ioffe-Pritchard magnetic bottles. Unlike other designs, our coil allows

Why Polymer Glasses with Enhanced Sub-nanosecond Relaxation are Tougher

February 12, 2021
Author(s)
Christopher Soles, Adam B. Burns, Kanae N. Ito, Jack F. Douglas, Robert Dimeo, Madhusudan (Madhu) Tyagi, Jingsheng Wu, Albert F. Yee, Yueh-Ting Shih, Liping Huang
This manuscript explores the connection between the fast relaxation processes in a polymer glass and essential trends in the mechanical toughness, a non-linear mechanical property that is of practical interest for engineering polymers with high impact

Foundational PNT Profile: Applying the Cyber Security Framework for the Responsible Use of Positioning, Navigation, and Timing (PNT) Services

February 11, 2021
Author(s)
Jim McCarthy, Karen Reczek, Michael Bartock, Ya-Shian Li-Baboud, Suzanne Lightman, Arthur Scholz, Theresa Suloway, Doug Northrip, Joesph Brule
The national and economic security of the United States (US) is dependent upon the reliable functioning of critical infrastructure. Positioning, Navigation and Timing (PNT) services are widely deployed throughout the critical infrastructure. A disruption

Key Practices in Cyber Supply Chain Risk Management: Observations from Industry

February 11, 2021
Author(s)
Jon M. Boyens, Celia Paulsen, Nadya Bartol, Kris Winkler, James Gimbi
In today's highly connected, inter-dependent world, all organizations rely on others for critical products and services. However, the reality of globalization, while providing many benefits, has resulted in a world where organizations no longer fully

Voices of First Responders - Applying Human Factors and Ergonomics Knowledge to Improve the Usability of Public Safety Communications Technology: Findings from User-Centered Interviews, Phase 1, Volume 5

February 11, 2021
Author(s)
Yee-Yin Choong, Gavriel Salvendy
With the newly created Nationwide Public Safety Broadband Network (NPSBN), the public safety community is in the process of supplementing the use of land mobile radios with a technology ecosystem that will include a variety of new and improved

A quantum enhanced search for dark matter axions

February 10, 2021
Author(s)
K M. Backes, Daniel A. Palken, S A. Kenany, Benjamin M. Brubaker, S B. Cahn, A Droster, Gene C. Hilton, Sumita Ghosh, H. Jackson, Steve K. Lamoreaux, A. F. Feder, Konrad Lehnert, S M. Lewis, Maxime Malnou, R H. Maruyama, N M. Rapidis, M Simanovskaia, Sukhman Singh, D H. Speller, I Urdinaran, Leila R. Vale, E. C. van Assendelft, K van Bibber, H. Wang

Dynamic Structure of Active Sites in Ceria-Supported Pt Catalysts for the Water Gas Shift Reaction

February 10, 2021
Author(s)
Yuanyuan Li, Matthew Kottwitz, Joshua L. Vincent, Zongyuan Liu, Michael J. Enright, Lihua Zhang, Jiahao Huang, Sanjaya D. Senanayake, Wei-Chang Yang, Peter A. Crozier, Ralph G. Nuzzo, Anatoly I. Frenkel
Oxide-supported noble metal catalysts have been extensively studied for decades for the water gas shift (WGS) reaction, a catalytic transformation central to a host of large volume processes that variously utilize or produce hydrogen. There remains

Gravity measured with record precision

February 10, 2021
Author(s)
Stephan Schlamminger
The gravitational constant G describes the strength of the gravitational uncertainty. Two new measurements with the world's smallest uncertainties are reported.

NIST Time and Frequency Bulletin

February 10, 2021
Author(s)
Kelsey A. Rodriguez
The Time and Frequency Bulletin provides information on performance of time scales and a variety of broadcasts (and related information) to users of the NIST services.

Redefining the kilogram and other SI units

February 10, 2021
Author(s)
Stephan Schlamminger
Units are at the heart of science and technology. Most measurements require units to express their result. The International System of Units (SI) provides a widely used coherent framework of units. While the present SI is fit for purpose for all

Blockchain Networks: Token Design and Management Overview

February 9, 2021
Author(s)
Loic D. Lesavre, Priam C. Varin, Dylan J. Yaga
Blockchain technology has enabled a new software paradigm for managing digital ownership in partial- or zero-trust environments. It uses tokens to conduct transactions, exchange verifiable data, and achieve coordination across organizations and on the web
Displaying 5201 - 5225 of 74359