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Displaying 3176 - 3200 of 74634

Welcome to SAMURAI's documentation!

January 13, 2022
Author(s)
Alec Weiss, Jeanne Quimby, Rod Leonhardt, Ben Jamroz, Peter Vouras, Kate Remley, Dylan Williams
The National Institute of Standards and Technology (NIST) Communication Technology Laboratory (CTL) developed the Synthetic Aperture Measurement with Uncertainties and Angle of Arrival (SAMURAI) millimeter-wave testbed and technique. SAMURAI utilizes a

A Convolutional Neural Networks-Based Approach for Texture Directionality Detection

January 12, 2022
Author(s)
Marcin Kociolek, Michal Kozlowski, Antonio Cardone
The perceived texture directionality is an important, not fully explored image characteristic. In many applications texture directionality detection is of fundamental importance. Several approaches have been proposed, such as the fast Fourier-based method

A Kinetic Mechanism for CF3I Inhibition of Methane-Air Flames

January 12, 2022
Author(s)
Valeri I. Babushok, Donald R. Burgess Jr., Gregory T. Linteris
The influence of CF3I on the burning velocity of methane–air flame is experimentally and numerically studied. Experimental results demonstrate that the inhibition effectiveness of CF3I is very close to that of CF3Br. A detailed kinetic model of flame

Core-hole potentials and related effects

January 12, 2022
Author(s)
Eric L. Shirley, Lars G. Pettersson, D. Prendergast
We consider the constrained-occupancy and (linear-response) self-consistent-field methods for screening of core-hole potentials that affect core excitation near-edge spectra. The methods are not exact, but each has distinct advantages and limitations. The

Magnetotransport and magnetic textures in Ho/FeCoGd/b-W multilayers

January 12, 2022
Author(s)
Ramesh Budhani, Vinay Sharma, Ezana Negusse, Jacob Casey, Arjun Pathak, Jerzy Sadowski, Brian Kirby
The enhancement of interfacial Dzyaloshinskii – Moriya Interaction (DMI) in magnetic multilayers results in the stabilization of topological spin textures like chiral domain walls and skyrmions. Here we report on the evaluation of interface-driven magnetic

Noble-metal dark-edge fermiology: core-hole memory and the "Zeeman Auger" effect

January 12, 2022
Author(s)
Eric L. Shirley, Joseph Woicik, Conan Weiland, Ahmed Rumaiz, Charles Cardot, Joshua Kas, John Rehr
Gold and platinum have the face-centered-cubic crystal structure, are considered noble metals, and differ by one in atomic number. Near-edge M4,5 x-ray absorption and resonant M4,5N6,7N6,7 Auger spectroscopy reveal "dark" edges and a photon-energy

Global perspectives of the bulk electronic structure of URu2Si2 from angle-resolved photoemission

January 11, 2022
Author(s)
Jonathan Denlinger, J.-S. Kang, L. Dudy, J. Allen, Kyoo Kim, J.-H. Shim, Kristjan Haule, J. Sarrao, Nicholas Butch, M. Maple
Previous high-resolution angle-resolved photoemission (ARPES) studies of URu 2Si 2 have characterized the temperature-dependent behavior of narrow-band states close to the Fermi level (E F) at low photon energies near the zone center, with an emphasis on

A Fundamental Equation of State for Vinyl Chloride

January 10, 2022
Author(s)
Monika Thol, Florian Fenkl, Eric W. Lemmon
A fundamental equation of state in terms of the Helmholtz energy is presented for vinyl chloride. Due to its fundamental nature, it can be used to consistently calculate all thermodynamic state properties in the fluid region. Based on the underlying

CODATA Recommended Values of the Fundamental Physical Constants: 2018

January 10, 2022
Author(s)
Eite Tiesinga, Peter J. Mohr, David B. Newell, Barry N. Taylor
We report the 2018 self-consistent values of constants and conversion factors of physics and chemistry recommended by the Committee on Data of the International Science Council (CODATA). The recommended values can also be found at physics.nist.gov

Easy-plane spin Hall nano-oscillators as spiking neurons for neuromorphic computing

January 10, 2022
Author(s)
Danijela Markovic, Matthew Daniels, Pankaj Sethi, Andrew Kent, Mark Stiles, Julie Grollier
We show analytically using a macrospin approximation that easy-plane spin Hall nano-oscillators excited by a spin-current polarized perpendicularly to the easy-plane have phase dynamics analogous to that of Josephson junctions. This allows them to

Geometric interference in a high-mobility graphene annulus p-n junction device

January 10, 2022
Author(s)
Son Le, Albert Rigosi, Joseph Hagmann, Christopher Gutierrez, Ji Ung Lee, Curt A. Richter
The emergence of interference is observed in the resistance of a graphene annulus pn junction device as a result of applying two separate gate voltages. The observed resistance patterns are carefully inspected, and it is determined that the position of the

Head Rotation Model for VR System Level Simulations

January 10, 2022
Author(s)
Steve Blandino, Tanguy Ropitault, Raied Caromi, Nada T. Golmie
The paper proposes a flexible mathematical time-correlated model, by leveraging experimental data adopted from recent measurements, to describe the head rotation in virtual reality applications. Virtual Reality (VR) promises immersive experience in diverse

NIST Outdoor Structure Separation Experiments (NOSSE): Preliminary Test Plan

January 10, 2022
Author(s)
Alexander Maranghides, Shonali Nazare, Eric Link, Matthew Bundy, Artur A. Chernovsky, Erik L. Johnsson, Kathryn Butler, Steven Hawks, Frank Bigelow, William (Ruddy) Mell, Anthony Bova, Derek McNamara, Tom MIlac, Daniel Gorham, Faraz Hedayati, Bob Raymer, Frank Frievalt, William Walton
The Structure Separation Project is a multi-level project to assess structure-to-structure fire spread in Wildland-Urban Interface (WUI) communities. The project is divided into three phases with each phase assessing radiant and convective heat exposures

Optical Fiber Time Delay Comparison between NIST and LAMETRO

January 10, 2022
Author(s)
Tasshi Dennis, Johnny Jimenez
We describe the results of a bilateral measurement comparison of optical fiber time delay between the National Institute of Standards and Technology (NIST, USA) and Laboratorio de Metrología, Instituto Costarricense de Electricidad (LAMETRO-ICE, Costa Rica

Large Change of Interlayer Vibrational Coupling with Stacking in Mo 1-x W x Te 2

January 7, 2022
Author(s)
John A. Schneeloch, Yu Tao, Jaime Fernandez-Baca, Guangyong Xu, Despina Louca
Stacking variations in quasi-two-dimensional materials can have an important influence on material properties, such as changing the topology of the band structure. Unfortunately, the weakness of van der Waals interactions makes it difficult to compute the

How important is microstuctural feature selection for data-driven structure-property mapping?

January 6, 2022
Author(s)
Hao Liu, Berkay Yucel, Daniel Wheeler, Baskar Ganapathysubramanian, Surya Kalidindi, Olga Wodo
Data-driven approaches now allow for systematic mapping of microstructure to properties. In particular, we now have d\ iverse approaches to "featurize" microstructures, creating a large pool of machine-readable descriptors for subsequent stru\ cture

Interfacial water asymmetry at ideal electrochemical interfaces

January 6, 2022
Author(s)
Abhishek Shandilya, Kathleen Schwarz, Ravishankar Sundararaman
Controlling electrochemical reactivity requires a detailed understanding of the charging behavior and thermodynamics of the electrochemical interface. Experiments can independently probe the overall charge response of the electrochemical double layer by
Displaying 3176 - 3200 of 74634