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Displaying 2201 - 2225 of 143806

WUI Fire Evacuation and Sheltering Considerations: Assessment, Planning, and Execution (ESCAPE)

August 21, 2023

Author(s)

Alexander Maranghides, Eric Link

Impacts of wildland-urban interface (WUI) fires continue to rise in the US, evidenced by the string of devastating and record-breaking events occurring since 2017. As seen in several events in recent years, WUI fires can impact communities quickly, leaving

A Turbulence Model Sensitivity Analysis on the Hydraulic Behavior in the Inlet Plenum of the Proposed NIST Neutron Source Design

August 20, 2023

Author(s)

Abdullah Weiss, Joy Shen, Anil Gurgen

The NIST Neutron Source, or NNS, is a proposed reactor designed to eventually replace the aging National Bureau of Standards Reactor at the NIST Center for Neutron Research (NCNR). The NNS is a light water moderated and cooled, compact reactor used to

Determination of Optimized Biaxial Cruciform Specimens of Mild Steels, SS 316L, and Aluminum Alloys

August 20, 2023

Author(s)

Dilip K. Banerjee, Mark Iadicola, Evan Rust

A methodology is described for obtaining optimum biaxial cruciform specimen designs by combining equibiaxial tension test data with finite element analysis (FEA) in conjunction with the application of an appropriate and a practical optimization strategy

Simulating the Power Noise Response Due to Voiding in the NBSR During the February 3rd Incident

August 20, 2023

Author(s)

Lap-Yan Cheng, Athi Varuttamaseni, Peter Kohut, Anil Gurgen, Dagistan Sahin, Abdullah Weiss

Ergodicity breaking in rapidly rotating C 60 fullerenese

August 18, 2023

Author(s)

Lee R. Liu, Dina Rosenberg, P. Bryan Changala, David Nesbitt, Timur Tscherbul, Jun Ye

Skyrmion-Excited Spin-Wave Fractal Networks

August 18, 2023

Author(s)

Nan Tang, W. L. N. C. Liyanage, Sergio A. Montoya, Sheena Patel, Lizabeth J. Quigley, Alexander Grutter, Michael R. Fitzsimmons, Sunil Sinha, Julie A. Borchers, Eric E. Fullerton, Lisa Debeer-Schmitt, Dustin A. Gilbert

Magnetic skyrmions exhibit unique, technologically relevant pseudo-particle behaviors which arise from their topological protection, including well-defined, three-dimensional breathing and gyration modes which occur at microwave frequencies. During dynamic

CFD informed design of bench-scale experiments to characterize air entrainment into fuel beds induced by columnar vortices

August 17, 2023

Author(s)

Giovanni Di Cristina Torres, Rodney Bryant

Recent experiments show that strong vortices, similar to fire whirls, can form far from a fire front in the region of smoldering fuel. These buoyancy-induced columnar vortices, visualized by entrained smolder smoke, were observed lofting hot embers into

Ergodicity breaking in rapidly rotating C 60 fullerenes

August 17, 2023

Author(s)

Lee R. Liu, Dina Rosenberg, Bryan Changala, Philip Crowley, David Nesbitt, Norman Yao, Timur Tscherbul, Jun Ye

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

Laser tracker relative range error evaluation by the back-to-back, common path single pass, and common path double pass methods

August 16, 2023

Author(s)

Marcos Motta de Souza, Bala Muralikrishnan, Vincent Lee, Daniel S. Sawyer

The Dimensional Metrology Group (DMG) at the National Institute of Standards and Technology (NIST) has a unique 60 m long length facility that provides traceable reference lengths for the evaluation of measuring tapes, optical fibers, electronic distance

Layered Porous Molecular Crystals via Interdigitation-Directed Assembly

August 16, 2023

Author(s)

Nie Fang, Siquan Zhang, Zhenchuang Xu, Si Chen, Xu Zhang, Hui Wu, Wei Zhou, Yanchuan Zhao

Building robust porous molecular architectures with van der Waals interactions holds promise for advancements in catalysis, chemosensing, and separation techniques. In a macroscopic context, grand buildings, toy houses, and jigsaw puzzles can be

Toward Voxel Level Control for Laser Powder Bed Fusion Additive Manufacturing Processes

August 16, 2023

Author(s)

Ho Yeung, Jorge Neira

In the Laser Powder Bed Fusion (LPBF) additive manufacturing (AM) process, a high-speed scanning laser beam is employed to construct components by melting and fusing metal powder together. While AM is generally characterized as a layer-by-layer technique

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

Reducing Bias and Quantifying Uncertainty in Fluorescence Produced by PCR

August 14, 2023

Author(s)

Robert De Jaco, Matthew Roberts, Erica Romsos, Peter Vallone, Anthony J. Kearsley

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

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