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Displaying 526 - 550 of 73898

Fabrication of Specimens for Atom Probe Tomography using a Combined Gallium and Neon Focused Ion Beam Milling Approach

August 16, 2023
Author(s)
Frances Allen, Paul Blanchard, David Pappas, Russell Lake, Deying Xia, John Notte, Ruopeng Zhang, Andrew Minor, Norman A. Sanford
We demonstrate a new focused ion beam sample preparation method for atom probe tomography. The key aspect of the new method is that we use a neon ion beam for the final tip shaping after conventional annulus milling using gallium ions. This dual-ion

Impact of Dynamic Prices on Distribution Grid Power Quality

August 16, 2023
Author(s)
David Holmberg, Thomas Roth, Farhad Omar
Dynamic price signals may provide a way to support integration of customer distributed energy resources (DER) into the electric grid and to help manage DER flexibility to support distribution system and bulk grid needs. Use of DER flexibility includes peak

MODELLING AND REMOVING DIGITIZER NONLINEARITY FOR ACCURATE DUAL FREQUENCY COMB SPECTROSCOPY

August 15, 2023
Author(s)
Nathan Malarich, Kevin Cossel, JEAN-DANIEL DESCHENES, Fabrizio Giorgetta, Brian Washburn, Nathan Newbury, Ian Coddington, Jerome Genest
Operation of any dual-comb spectrometer requires digitization of the interference signal before further processing. Nonlinearities in the analog-to-digital conversion can alter the apparent gas concentration by multiple percent, limiting both precision and

Report from the 2022 NIST Rapid Microbial Testing Methods (RMTM) Workshop

August 15, 2023
Author(s)
Stephanie Servetas, Nancy Lin, Nadratun Chowdhury, Scott Jackson, Jason Kralj, Sheng Lin-Gibson, Melody Sanders, Tara Eskandari
Safety and quality of advanced therapies, including cellular, gene, and tissue-engineered medical products, is paramount for success of these products. Sterility assurance testing confirming the absence of microbial contamination in advanced therapy

Measuring the permittivity tensor of anisotropic DyScO3 to 110 GHz

August 14, 2023
Author(s)
Florian Bergmann, Meagan Papac, Nick Jungwirth, Bryan Bosworth, Tomasz Karpisz, Anna Osella, Lucas Enright, Eric Marksz, Angela Stelson, Chris Long, Nate Orloff
DyScO3 (DSO) is an attractive substrate on which to grow epitaxial thin films with extraordinary materials physics. However, its highly anisotropic permittivity makes some measurements exceedingly difficult: For instance, its permittivity tensor has not

pH-Dependent Solution Micellar Structure of Amphoteric Polypeptoid Block Copolymers with Positionally Controlled Ionizable Sites

August 14, 2023
Author(s)
Meng Zhang, Yun Liu, Xiaobing Zuo, Shuo Qian, Sai Pingali, Richard E. Gillilan, Qingqiu Huang, Donghui Zhang
Solution self‐assembly of ionic block copolymers (BCP) with randomly distributed ionization sites along the hydrophilic segments have been extensively studied. By contrast, the roles of positionally controlled ionization sites along the BCP chains in their

Results of German external quality assessment schemes for SARS-CoV-2 antigen detection

August 14, 2023
Author(s)
Laura Vierbaum, Nathalie Wojtalewicz, Peter Grunert, Anika Zimmerman, Annemarie Scholz, Sabine Goseberg, Patricia Kaiser, Ulf Duehring, Christian Drosten, Victor Max Corman, Daniela Niemeyer, Holger F. Rabenau, Martin Obermeier, Andreas Nitsche, Janine Michel, Jim Huggett, Denise O'Sullivan, Simon Cowen, Peter Vallone, Megan Cleveland, Samreen Falak, Andreas Kummrow, Ingo Schellenberg, Heinz Zeichhardt, Martin Kammel
The COVID-19 pandemic illustrated the important role of diagnostic tests, including lateral flow tests (LFTs), in identifying patients and their contacts to slow the spread of infections. INSTAND performed external quality assessments (EQA) for SARS-CoV-2

Accelerator-Based Production of Scandium Radioisotopes for Applications in Prostate Cancer: Toward Building a Pipeline for Rapid Development of Novel Theranostics

August 13, 2023
Author(s)
Jason Meier, Hannah Zhang, Richard Freifelder, Mohammed Bhuiyan, Phillip Selman, Megan Mendez, Pavithra Kankanamalage, Thomas Brossard, Antonino Pusateri, Hsiu-Ming Tsai, Lara Leoni, Sagada Penano, Kaustab Ghosh, Brittany Broder, Erica Markiewicz, Amy Renne, Walter Stadler, Ralph Weichselbaum, Jerry Nolen, Chien-Min Kao, Satish Chitneni, David Rotsch, Russell Szmulewitz, Chin-Tu Chen
In the field of nuclear medicine, the β+ emitting 43Sc and β- emitting 47Sc are promising candidates in cancer diagnosis and targeted radionuclide therapy (TRT) due to their fa-vorable decay schema and shared pharmacokinetics as a true theranostic pair

Three-Dimensional Neutron Far-Field Tomography of a Bulk Skyrmion Lattice

August 13, 2023
Author(s)
Melissa Henderson, Benjamin Heacock, Markus Bleuel, David Cory, Colin Heikes, Michael G. Huber, Jeffery Krzywon, Olivier Nahman-Levesque, Graeme Luke, M Pula, Dusan Sarenac, Kirill Zhernenkov, Dmitry Pushin
Magnetic skyrmions are localized non-collinear spin textures, characterized by an integer topo-logical charge. Their nanometric size and topological protection gives rise to unique dynamics and emergent electromagnetic phenomena, ideal for spintronic

American Competitiveness Of a More Productive Emerging Tech Economy Act (The American COMPETE Act)

August 11, 2023
Author(s)
Commerce Secretary, Kevin A. Kimball, Matthew Hoehler, Anne Lane, Elham Tabassi, Connie LaSalle, Mark VanLandingham, James A. Warren, Naomi Lefkovitz, Nada T. Golmie, Chris Greer, Matthew Scholl, Dylan Yaga, Andrew C. Wilson, Kevin Stine, Karen Reczek, Institute for Defense Analyses Science and Technology Policy Institute (IDA STPI), Quantum Economic Development Consortium (QED-C), Federal Trade Commission (FTC)
Under DIVISION FF, Title XV, §1501 of the Consolidated Appropriations Act of 2021 (Public Law 116-260)—the "American Competitiveness Of a More Productive Emerging Tech Economy Act" (the "American COMPETE Act")—the United States Congress directed the

Rapid chemical screening of microplastics and nanoplastics by thermal desorption and pyrolysis mass spectrometry with unsupervised fuzzy clustering

August 11, 2023
Author(s)
Thomas P. Forbes, John Pettibone, Eric S. Windsor, Joseph M. Conny, Robert A. Fletcher
The transport and chemical identification of microplastics and nanoplastics (MNPs) are critical to the concerns over plastic accumulation in the environment. Chemically and physically transient MNP species present unique challenges for isolation and

Recommendations for Setting a Criterion for Assessing Commutability of Secondary Calibrator Certified Reference Materials

August 11, 2023
Author(s)
W. Greg Miller, Thomas Keller, Jeffrey Budd, Jesper Johansen, Mauro Panteghini, Neil Greenberg, Vincent Delatour, Ferruccio Ceriotti, Robert Rej, Johanna Camara, Liesbet Deprez, Finlay MacKenzie, Alicia Lyle, Eline van der Hagen, Chris Burns, Pernille Fauskanger, Sverre Sandberg
A secondary higher-order calibrator is required to be commutable with clinical samples to be suitable for use in the calibration hierarchy of an end-user clinical laboratory in vitro diagnostic medical device (IVD-MD). Commutability is a property of a

An Equation of State for the Thermodynamic Properties of Helium

August 10, 2023
Author(s)
Diego Ortiz Vega, Kenneth Hall, James Holste, Allan H. Harvey, Eric W. Lemmon
This report documents the equation of state for fluid helium implemented in Version 10 of NIST's REFPROP Standard Reference Database. The equation of state is expressed as the molar Helmholtz energy as a function of temperature and density, and is valid

Fundamentals of Geometric Dimensioning and Tolerancing, Part II

August 10, 2023
Author(s)
Jaime Berez, Maxwell R. Praniewicz
This 45-60 minute presentation (part II of II) provides a contextual and technical introduction to the fundamentals of geometric dimensioning and tolerancing (GD&T), a system used in engineering product definition, i.e., engineering drawings. This

AutoEIS: automated Bayesian model selection and analysis for electrochemical impedance spectroscopy

August 9, 2023
Author(s)
Runze Zhang, Robert Black, Debashish Sur, Parisa Karimi, Kangming Li, Brian DeCost, John Scully, Jason Hattrick-Simpers
Electrochemical Impedance Spectroscopy (EIS) is a powerful tool for electrochemical analysis; however, its data can be challenging to interpret. Here, we introduce a new open-source tool named AutoEIS that assists EIS analysis by automatically proposing

Quantum Lego Expansion Pack: Enumerators from Tensor Networks

August 9, 2023
Author(s)
ChunJun Cao, Michael Gullans, Brad Lackey, Zitao Wang
We provide the first tensor network method for computing quantum weight enumerator polynomials in the most general form. As a corollary, if a quantum code has a known tensor network construction of its encoding map, our method produces an algorithm that

14 Examples of How LLMs Can Transform Materials Science and Chemistry: A Reflection on a Large Language Model Hackathon

August 8, 2023
Author(s)
Kevin Maik Jablonka, Alexander Al-Feghali, Shruti Badhwar, Joshua Bocarsly, Stefan Bringuier, Kamal Choudhary, Defne Circi, Samantha Cox, Matthew Evans, Nicolas Gastellu, Jerome Genzling, Maria Victoria Gil, Ankur Gupta, Wibe de Jong, Tao Liu, Sauradeep Majumdar, Garrett Merz, Nicolas Moitessier, Lynda Brinson, Beatriz Mourino, Brenden Pelkie, Mayk Caldas Ramos, Bojana Rankovic, Jacob Sanders, Ben Blaiszik, Andrew White, Ian Foster, Ghezal Ahmad Jan Zia
Chemistry and materials science are complex. Recently, there have been great successes in addressing this complexity using data-driven or computational techniques. Yet, the necessity of input structured in very specific forms and the fact that there is an
Displaying 526 - 550 of 73898