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NIST Authors in Bold

Displaying 2051 - 2075 of 73697

Optical n(p, T_90) measurement suite 1: He, Ar, and N_2

November 23, 2023
Author(s)
Patrick Egan, Yuanchao Yang
An n(p, T90) measurement suite is reported for the gases helium, argon, and nitrogen. The methodology is optical refractive-index gas metrology, operating at laser wavelength 633 nm and covering the temperature range (293 T 433) K and pressures p 0.5

Untargeted metabolomics analyses and contaminant chemistry of Dreissenid mussels at the Maumee River Area of Concern in the Great Lakes

November 22, 2023
Author(s)
Tracey Schock, Daniel Bearden, Fabio Casu, Michael Edwards, Annie Jacob, Edward Johnson, Amanda Bayless, Elena Legrand
Bivalves stand out as an ideal ecological indicator and have been the basis of NOAA's Mussel Watch Program to monitor environmental health. In this study, we aimed to investigate the health of the Dreissenid mussel in the Maumee River. In addition to the

An investigation into an approach for automated supply chain onboarding

November 21, 2023
Author(s)
Elena Jelisic, Nenad Ivezic, Boonserm Kulvatunyou, Perawit Charoenwut, Ana Nikolov
The COVID-19 pandemic has brought the cold chain for bio-pharmaceutical products to the spotlight. To preserve their structure and function, biopharmaceuticals such as cells, proteins and enzymes, RNA molecules, and RNA-based drugs (e.g., mRNA-based COVID

Developmental Validation of the VersaPlex(R) 27PY System

November 21, 2023
Author(s)
Kristy Lenz, Stephen McDaniel, Dawn Rabbach, Becky Steffen, Douglas Storts, Robert McLaren
The VersaPlex™ 27PY System is a short tandem repeat (STR) multiplex from Promega that co-amplifies 27 loci. This six-dye multiplex was designed for casework samples and includes loci that meet database requirements for the US (CODIS) and Europe (ESS). The

Facilitating Stakeholder Communication around AI-Enabled Systems and Business Processes

November 21, 2023
Author(s)
Edward Griffor, Matthew Bundas, Chasity Nadeau, Jeannine Shantz, Thanh Nguyen, Marcello Balduccini, Tran Son
Artificial Intelligence (AI) is often critical to the success of modern business processes. Leveraging it, however, is non-trivial. A major hurdle is communication: discussing system requirements among stakeholders with different backgrounds and goals

Knowledge Management for Data Analytics in Additive Manufacturing

November 21, 2023
Author(s)
Yeun Park, Paul Witherell, Albert T. Jones, Hyunbo Cho
As a multi-staged digital manufacturing process, Additive manufacturing (AM) inherently benefits from data analytics (DA) decision-making opportunities. The abundance of data associated with the various observations and measurements taken throughout the

NIST efforts in extreme-ultraviolet metrology

November 21, 2023
Author(s)
Charles S. Tarrio, Steven Grantham, Rob Vest, Thomas A. Germer, Bryan Barnes, Stephanie Moffitt, Brian Simonds, Matthew Spidell
For several decades, the National Institute of Standards and Technology (NIST) has actively supported metrology programs for extreme ultraviolet (EUV) lithography. We will describe our existing programs in optics lifetime, reflectometry, and radiometry

2023 NIST Summary of U.S. Legal Metrology Activities

November 20, 2023
Author(s)
Lisa Warfield, Katrice Lippa, Jan Konijnenburg, Loren Minnich, Gloria Diane Lee, Juana Williams, John McGuire
The NIST Office of Weights and Measures (OWM) presents its second issue of the 2023 NIST Annual Summary of U.S. Legal Metrology Activities report. This report includes a summary of changes made to NIST Handbook 44 (2023) Specifications, Tolerances and

Monitoring Spectrometer Drift with Unsupervised Machine Learning

November 20, 2023
Author(s)
Benjamin Harding, Ziling Hu, Ashley Hiett, Frank Delaglio, Katherine Henzler- Wildman, Chad Rienstra
Solid-state NMR spectroscopy (SSNMR) is a powerful technique to probe structural and dynamic properties of molecules at an atomic level. Modern SSNMR methods employ multidimensional pulse sequences requiring data collection over a period of days to weeks

Optimal binary gratings for multi-wavelength magneto-optical traps

November 20, 2023
Author(s)
Oliver Burrow, Robert Fasano, Michael Wright, Wesley Brand, Wenbo Li, Andrew Ludlow, Erling Riis, Paul Griffin, Aidan Arnold
Grating magneto-optical traps are an enabling quantum technology for portable metrological devices with ultracold atoms. However, beam diffraction efficiency and angle are affected by wavelength, creating a single-optic design challenge for laser cooling

Robust Measurements for RF Fingerprinting with Constellation Patterns of Radiated Waveforms

November 20, 2023
Author(s)
Ameya Ramadurgakar, Jake Rezac, Lennart Heijnen, Kate Remley, Dylan Williams, MELINDA PIKET-MAY, Rob Horansky
We introduce a type of RF fingerprint for nondestructive, cellular device identification. The new fingerprinting algorithm, termed Eigenphones, is a data-driven technique based on a singular value decomposition of a user equipment's symbol-constellation

Scalable and robust beam shaping using apodized fish-bone grating couplers

November 20, 2023
Author(s)
Chad Ropp, Dhriti Maurya, Alexander Yulaev, Daron Westly, Gregory Simelgor, Vladimir Aksyuk
Efficient power coupling between guided and free-space optical modes requires precision spatial mode matching with apodized Bragg gratings. Yet, grating apodizations are often limited by the minimum feature size realizable by the fabrication approach

Understanding and Leveraging Short Range Order in Compositionally Complex Alloys

November 20, 2023
Author(s)
Mitra Taheri, Elaf Anber, Annie Barnett, Nick Birbilis, Brian DeCost, Daniel Foley, Emily Holcombe, Jonathan Hollenbach, Howie Joress, Yevgeny Rakita, James Rondinelli, Nathan Smith, Michael Waters, Chris Wolverton
In this article, we review the opportunities and challenges associated with complex concentrated materials that exhibit short-range order. Although the presence of such phenomena has been theorized, accurate computational representation, characterization

Microfluidic Blood Separation: Key Technologies and Critical Figures of Merit

November 18, 2023
Author(s)
Karina Torres Castro, Katherine Acuna-Umana, Leonardo Lesser-Rojas, Darwin Reyes-Hernandez
Blood is a complex sample comprised mostly of plasma, red blood cells (RBCs), and other cells whose concentrations correlate to physiological or pathological health conditions. There are also many blood-circulating biomarkers, such as circulating tumor
Displaying 2051 - 2075 of 73697
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