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Search Publications

NIST Authors in Bold

Displaying 6176 - 6200 of 73697

High-accuracy room temperature planar absolute radiometer based on vertically aligned carbon nanotubes

July 1, 2021
Author(s)
Anna Vaskuri, Michelle Stephens, Nathan Tomlin, Matthew Spidell, Chris Yung, Andrew Walowitz, Cameron Straatsma, David Harber, John H. Lehman
We have developed a Planar Absolute Radiometer for Room Temperature (PARRoT) that will replace the legacy C-series calorimeter as the free-space continuous-wave laser power detector standard at the National Institute of Standards and Technology (NIST)

Polarization Effects of X-ray Monochromators Modeled Using Dynamical Scattering Theory

July 1, 2021
Author(s)
Marcus Mendenhall, David R. Black, Donald Windover, James Cline
The difference in the diffracted intensity of the sigma-and pi-polarized components of an X-ray beam in powder diffraction has generally been treated according to equations based on dipole scattering, also known as kinematic X-ray scattering. Although this

Two-Dimensional Overdamped Fluctuations of the Soft Perovskite Lattice in CsPbBr 3

July 1, 2021
Author(s)
T. Lanigan-Atkins, X. He, M. Krogstad, D. M. Pajerowski, D. Abernathy, Guangyong Xu, Zhijun Xu, D.-Y. Chung, M. G. Kanatzidis, S. Rosenkranz, R. Osborn, O. Delaire
Lead halide perovskites exhibit structural instabilities and large atomic fluctuations thought to impact their optical and thermal properties, yet detailed structural and temporal correlations of their atomic motions remain poorly understood. Here, these

CODATA Recommended Values of the Fundamental Physical Constants: 2018

June 30, 2021
Author(s)
Eite Tiesinga, Peter Mohr, David B. Newell, Barry Taylor
We report the 2018 self-consistent values of constants and conversion factors of physics and chemistry recommended by the Committee on Data of the Interna- tional Science Council (CODATA). The recommended values can also be found at physics.nist.gov

Dipole-Dipole Frequency Shifts in Multilevel Atoms

June 30, 2021
Author(s)
Andre Cidrim, Asier Pineiro Orioli, Christian Sanner, Ross B. Hutson, Jun Ye, Romain Bachelard, Ana Maria Rey
Dipole-dipole interactions lead to frequency shifts which are expected to limit the performance of next generation atomic clocks. In this work, we compute dipolar frequency shifts accounting for the intrinsic atomic multilevel structure in standard Ramsey

IRIS-HEP Blueprint Workshop Summary: Learning from the Pandemic: the Future of Meetings in HEP and Beyond

June 30, 2021
Author(s)
Mark Neubauer, Todd Adams, Jennifer Adelman-McCarthy, Gabriele Benelli, Tulika Bose, David Britton, Ben Galewsky, Bo Jayatilaka, Brendan Kiburg, Maciej Gladki, Aman Goel, Jonathan E. Guyer, Pat Burchat, Joel Butler, Timothy Cartwright, Tomas Davidek, Jacques Dumarchez, Peter Elmer, Matthew Feickert, Mandeep Gill, Benjamin Krikler, David Lange, Claire Lee, Nick Manganelli, Giovanni Marchiori, Meenakshi Narain, Ianna Osborne, Jim Pivarski, Harrison Prosper, Graeme Stewart, Eduardo Rodrigues, Roberto Salerno, Marguerite Tonjes, Jaroslav Trnka, Vera Varanda, Vassil Vassilev, Gordon Watts, Sam Zeller, Yuanyuan Zhang
The COVID-19 pandemic has by-and-large prevented in-person meetings since March 2020. While the increasing deployment of effective vaccines around the world is a very positive development, the timeline and pathway to "normality" is uncertain and the "new

NVLAP Cryptographic and Security Testing

June 30, 2021
Author(s)
Bradley Moore, Beverly Trapnell, James F. Fox, Carolyn French
NIST Handbook 150-17 presents the technical requirements and guidance for the accreditation of laboratories under the National Voluntary Laboratory Accreditation Program (NVLAP) Cryptographic and Security Testing (CST) program. It is intended for

Adapting natural language processing for technical text

June 29, 2021
Author(s)
Alden A. Dima, Sarah Lukens, Melinda Hodkiewicz, Thurston Sexton, Michael Brundage
Despite recent dramatic successes, Natural Language Processing (NLP) is not ready to address a variety of real-world problems. Its reliance on large standard corpora, a training and evaluation paradigm that favors the learning of shallow heuristics, and

Freezing of a Disorder Induced Spin Liquid with Strong Quantum Fluctuations

June 29, 2021
Author(s)
Xiao Hu, Daniel M. Pajerowski, Depei Zhang, Andrey Podlesnyak, Yiming Qiu, Qing Huang, Haidong Zhou, Israel Klich, Alexander I. Kolesnikov, M. B. Stone, Seung-Hun Lee
Sr 2CuTe 0.5W 0.5O 6 is a square-lattice magnet with super-exchange between S = 1/2 Cu 2+ spins mediated by randomly distributed Te and W ions. Here, using sub-K temperature and 20 µeV energy resolution neutron scattering experiments we show that this

Prospects of a Pb$^2+}$ ion clock

June 29, 2021
Author(s)
Kyle Beloy
We propose a high-performance atomic clock based on the 1.81 PHz transition between the ground and first-excited state of doubly ionized lead. Utilizing an even isotope of lead, both clock states have $I=J=F=0$, where $I$, $J$, and $F$ are the conventional

Super-Ancillary Equations for Cubic Equations of State

June 29, 2021
Author(s)
Ian Bell, Ulrich K. Deiters
Calculation of thermodynamic phase equilibrium is error-prone and can fail both near the critical point and at very low temperatures because of the limited precision available in double precision arithmetic. Most importantly, these calculations frequently

Towards Deep Q-Network Based Resource Allocation in Industrial Internet of Things

June 29, 2021
Author(s)
Fan Liang, Wei Yu, Xing Liu, David W. Griffith, Nada T. Golmie
With the increasing adoption of Industrial Internet of Things (IIoT) devices, infrastructures, and supporting applications, it is critical to design schemes to effectively allocate resources (e.g., networking, computing, and energy) in IIoT systems
Displaying 6176 - 6200 of 73697
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