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Displaying 2126 - 2150 of 74303

The kilogram: inertial or gravitational mass?

August 5, 2022
Author(s)
Stephan Schlamminger, Giovanni Mana
The redefinition of the international system of units fixes the values of the unperturbed ground state hyperfine transition frequency of the $^133}$Cs atom, speed of light in vacuum, and Planck constant. Therefore, differently from the past, the kilogram

Structural Fingerprinting of siRNA Therapeutics by Solution NMR Spectroscopy

August 4, 2022
Author(s)
Owen Becette, Anh Tran, Jace Jones, John Marino, Robert Brinson
Nucleic acids are an increasingly popular platform for the development of biotherapeutics to treat a wide variety of illnesses, including diseases where traditional drug development efforts have failed. To date, there are 14 short oligonucleotide

The Effect of Organic Coatings in the Magnetization of CoFe 2 O 4 Nanoparticles

August 4, 2022
Author(s)
Priscyla L. Andrade, Valdeene Silva, Kathryn L. Krycka, Juscelino Leao, I-Lin Liu, Maria P. Silva, J. Albino Aguiar
Cobalt ferrite has attracted considerable attention in recent years due to the unique physical properties such as high Curie temperature, large magnetocrystalline anisotropy, high coercivity, moderate saturation magnetization, large magnetostrictive

Prototype of high accuracy single input phase measurement instrument

August 2, 2022
Author(s)
Nicholas G. Paulter Jr., Ioan Tudosa, Francesco Picariello, Pasquale Daponte, Luca De Vito, Sergio Rapuano
A prototype implementation of a phase measurement method (PMM) for a sine-wave signal delivered at the output port of a generator and its experimental assessment is presented. This PMM is capable of measuring the output phase of a sine-wave signal respect

D-to-A_eff converter

August 1, 2022
Author(s)
Patrick Egan, Eric S. Stanfield, John R. Stoup
Recent developments in diameter metrology at NIST have enabled the dimensional characterization of piston-cylinder assemblies (PCA) with unprecedented precision. For the newest generation of PCA, standard uncertainty on measurement of outer diameter is 12

Effect of Tribologically-Induced Changes in Surface Termination of Silicon-Containing Diamond-Like Carbon Coatings on the Resistance to Biomolecule Adsorption

August 1, 2022
Author(s)
Cherno Jaye, Daniel A. Fischer, Zixuan Li, Jennings Z. Ye, Jieming Yan, Nicolas Molina, Hsu-Ming Lien, Robert Chrostowksi, Jianliang Lin, Mangolini Mangolini
Silicon-containing diamond-like carbon (DLC) is a class of thin-film materials with excellent mechanical properties, high thermal stability, and good tribological performance over a wide range of environmental conditions. While non-alloyed/non-doped DLCs

Gap Analysis for Key Interoperability Scenarios in Election Technology

August 1, 2022
Author(s)
John Dziurlaj, Benjamin Long
This document describes potential use-cases for data interoperability in election technology components not previously considered in past efforts. Such components include on-demand ballot printing systems, remote ballot marking systems and electronic poll

IG3IS Urban Greenhouse Gas Emission Observation and Monitoring Best Research Practices

August 1, 2022
Author(s)
Jocelyn Turnbull, Philip DeCola, Kimberly Mueller, Felix Vogel, Anna Karion, Israel Lopez Coto, James Whetstone
The Integrated Global Greenhouse Gas Information System (IG3IS) aims to coordinate an integrated global greenhouse gas information system, linking inventory and process model-based information with atmospheric observations and atmospheric modelling, to

Levels and profiles of perfluorinated alkyl acids in liver tissues of birds with different habitat types and trophic levels from an urbanized coastal region of South Korea

August 1, 2022
Author(s)
Sang Hee Hong, Jessica L. Reiner, Mi Jang, Stacy Schuur, Gi Myung Han, John Kucklick, Won Joon Shim
Contamination status and characteristics of perfluorinated alkyl acids (PFAAs) including perfluorinated carboxylic acids (PFCAs) and perfluorinated sulfonic acids (PFSAs) was examined using liver tissue of birds - blacktailed gulls (Larus crassirostris)

Off-spec fly ash-based lightweight aggregate properties and their influence on the fresh, mechanical, and hydration properties of lightweight concrete: A comparative study

August 1, 2022
Author(s)
Edward Garboczi, Mohammad Balapour, Mohammad Khaneghahi, Yick Hsuan, Diana Hun, Yaghoob Farnam
In this study, an off-spec fly ash-based spherical lightweight aggregate (LWA), designated SPoRA, was manufactured through a pilot-scale production and its engineering properties, including specific gravity, dry rodded unit weight, water absorption

Recommendations for Voting System Interoperability

August 1, 2022
Author(s)
John Dziurlaj, Benjamin Long
There is currently no common data format for ballot styles and associated use-cases. This white paper investigates this and other potential interoperability gaps within the voting system in a holistic manner, by considering previous voting interoperability

Shrinks When It's Colder

August 1, 2022
Author(s)
Patrick Egan
Thermal expansion can be a leading cause of uncertainty in length metrology. A cell-based refractometer has been designed at NIST which targets 10^-6} relative uncertainty in the measurement of helium refractivity; in terms of refractive index at ambient
Displaying 2126 - 2150 of 74303