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NIST Authors in Bold

Displaying 4801 - 4825 of 74358

JPEG 2000 CODEC Certification Guidance for 1000 ppi Fingerprint Friction Ridge Imagery

May 5, 2021
Author(s)
Shahram Orandi, John M. Libert, John Grantham, Michael Garris, Frederick R. Byers
The document describes the procedure by which applications of JPEG 2000 CODECs will be evaluated with respect to conformance to the NIST guidance for compression of 1000 ppi friction ridge images as detailed in NIST Special Publication 500-289 [NIST3]. The

Magnetic Ordering and Structural Distortion in PrFeAsO Single Crystal Studied by Neutron and X-ray Scattering

May 5, 2021
Author(s)
M. G. Kim, William D. Ratcliff, D. M. Pajerowski, J.-W. Kim, J.-Q. Yan, Jeffrey W. Lynn, A. I. Goldman, A. Kreyssig
We report the magnetic ordering and structural distortion in PrFeAsO crystals, the basis compound for one of the oxypnictide superconductors, using high-resolution x-ray diffraction, neutron diffraction, and x-ray resonant magnetic scattering (XRMS). We

Tunable three-body loss in a nonlinear Rydberg medium

May 5, 2021
Author(s)
James(Trey) Porto, Alexey Gorshkov, Michael Gullans, D. Ornelas-Huerta, Przemyslaw Bienias, A. Craddock, A. Hachtel, Marcin Kalinowski, Mary Lyon, Steven L. Rolston
Long-range Rydberg interactions, in combination with electromagnetically induced transparency(EIT), give rise to strongly interacting photons where the strength, sign, and form of the interactions are widely tunable and controllable. Such control can be

Vectorizing Green's Identities

May 5, 2021
Author(s)
Alex Yuffa
Green's theorem and Green's identities are well-known and their uses span almost every branch of science and mathematics. In this paper, we derive a vector analogue of Green's three scalar identities and consider some of their uses. We also offer a number

Eliciting Lessons from Small- and Medium-Sized Enterprises for Resilience During and Following Complex Events: Longitudinal Data Collection (Wave 2)

May 4, 2021
Author(s)
Jennifer Helgeson, Juan Fung, Alfredo Roa Henriquez, Ariela Zycherman, Payam Aminpour Mohammadabadi, Claudia Nierenberg, David Butry, Donna Ramkissoon
In 2020, there were 22 natural disasters with losses exceeding $1 billion each in the US (NOAA NCEI, 2021). Economic effects on the areas impacted directly were significant; Swiss Re estimated insured losses to be $83 billion, making 2020 the fifth

Mechanisms of Anelastic Loss in Langasite at Temperatures from 113 K to 1324 K

May 4, 2021
Author(s)
Ward L. Johnson, Yuriy Suhak, Holger Fritze
Synthetic piezoelectric crystals with the structure of langasite (LGS) are being pursued for resonant acoustic sensors that can operate at temperatures exceeding the range of conventional piezoelectric materials. The optimization of these crystals is

The NIST IrisDaily Dataset: Description and Initial Analysis

May 4, 2021
Author(s)
James Matey
This paper describes a dataset, IrisDaily-NIST, that is under construction by NIST. At the present, this dataset has (nearly) daily iris images of a single subject collected with a commercial iris camera over a period of approximately 4 months. The purpose

Timing Offset and Timing Stability for Dual-Clock Systems

May 4, 2021
Author(s)
Joshua Kast, Jeanne Quimby, Jake Rezac, Stefania Romisch
In this work, we describe a mathematical framework for evaluating timing offset and timing noise in channel sounders, based on a second-order deterministic model, and a stochastic metric based on the Allan Deviation. Using this framework, we analyze the

Use Case Scenarios for Digital Twin Implementation Based on ISO 23247

May 4, 2021
Author(s)
Guodong Shao
As a key part of digital transformation, digital twin is an important concept for achieving smart manufacturing. However, there remains a lot of confusion about the digital twin concept and how it can be implemented in real manufacturing systems

A Distinct Spin Structure and Giant Baromagnetic Effect in MnNiGe Compounds with Fe-Doping

May 3, 2021
Author(s)
Feiran Shen, Houbo Zhou, Fengxia Hu, Jian-Tao Wang, Hui Wu, Qingzhen Huang, Jiazheng Hao, Zibing Yu, Yihong Gao, Yuan Lin, Yangxin Wang, Cheng Zhang, Zhuo Yin, Jing Wang, Sihao Deng, Jie Chen, Lunhua He, Tianjiao Liang, Jirong Sun, Tongyun Zhao, Baogen Shen
Spin structure of a magnetic system results from the competition of various exchange couplings. Pressure driven spin structure evolution, through altering interatomic distance and hence electronic structure, produces baromagnetic effect(BME), which has

Cautionary Note on Contamination of Reagents Used for Molecular Detection of SARS-CoV-2

May 3, 2021
Author(s)
Peter Vallone, James Huggett, Vladimir Benes, Jeremy Garson, Kathryn Harris, Mikael Kubista, Timothy McHugh, Jacob Moran-Gilad, Tania Nolan, Michael Pfaffl, Marc Salit, Greg Shipley, Jo Vandesompele
Reverse transcription (RT)-PCR, the principal diagnostic method applied in the world-wide struggle against COVID-19, is capable of detecting a single molecule of a viral genome. Correctly designed and practiced RT-PCR assays for SARS-CoV-2 should not cross

Comparison of electrostatic and photon pressure force references at the nanonewton level

May 3, 2021
Author(s)
Gordon Shaw, John A. Kramar, Paul Williams, Matthew Spidell, Richard Mirin, Julian Stirling
This work describes a comparison between nanonewton force references derived from an electrostatic force balance and photon pressure force from calibrated laser optical power in the 1 watt range. The NIST Electrostatic Force Balance (EFB) is used to

Filling the Pharmacopeial Gaps of Visual Inspection Toward Standardization and Consistency of Visible Particle Testing

May 3, 2021
Author(s)
Linda Narhi, George M. Bou-Assaf, Kristen Gonzalez, Maryam Mazaheri, Steven Messick, Srivalli Telikepalli
The presence of visible particles that are not anticipated to be present in drug products is one of the most common causes of recalls, and warning letters1, 2. This critical quality attribute, which is typically determined during visual inspection (along

Quantum field theory for the chiral clock transition in one spatial dimension

May 3, 2021
Author(s)
Seth P. Whitsitt, Rhine Samajdar, Subir Sachdev
We describe the quantum phase transition in the N-state chiral clock model in spatial dimension d=1. With couplings chosen to preserve time-reversal and spatial inversion symmetries, such a model, is in the universality class of recent experimental studies

Report of the 104th National Conference on Weights and Measures

May 3, 2021
Author(s)
Yvonne Branden
The 104th Annual Meeting of the National Conference on Weights and Measures (NCWM) was held July 14 - 18, 2019, at the Hyatt Regency Milwaukee Hotel, Milwaukee, Wisconsin. The theme of the meeting was "Assuring Equity in the Marketplace: NIST and NCWM

Revision of the SNPforID 34-plex forensic ancestry test: Assay enhancements, standard reference sample genotypes and extended population studies

May 3, 2021
Author(s)
John Butler, Manuel Fondevila, Carla Santos, Ana Freire, Christopher Phillips, M Lareu, Peter Vallone
A revision of an established 34 SNP forensic ancestry test has been made by swapping the under- performing rs727811 component SNP with the highly informative rs3827760 that shows a near-fixed East Asian specific allele. We collated SNP variability data for

Scaling of Mass and Force Using Electrical Metrology

May 3, 2021
Author(s)
Gordon Shaw
The impending redefinition of the International System of Units (SI) allows realization of the kilogram using electrical metrology. It can be shown that electrical metrology can also be used to scale mass using electrostatic forces. An approach to mass
Displaying 4801 - 4825 of 74358