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Displaying 4851 - 4875 of 73741

Universal Dynamics of Magnetic Monopoles in Two-Dimensional Kagome Ice

December 15, 2021
Author(s)
Hiroshi Takatsu, Kazuki Goto, Taku J. Sato, Jeffrey W. Lynn, Kazuyuki Matsubayashi, Yoshiya Uwatoko, Ryuji Higashinaka, Kazuyuki Matsuhira, Zenji Hiroi, Hiroaki Kadowaki
A magnetic monopole in spin ice is a novel quasiparticle excitation in condensed matter physics, and we found that the AC frequency dependent magnetic susceptibility X(ω) in the two-dimensional (2D) spin ice (so-called kagome ice) of Dy 2Ti 2O 7 shows a

Using Simulation and Digital Twins to Innovate: Are We Getting Smarter?

December 15, 2021
Author(s)
Simon Taylor, Bjorn Johansson, Sumin Jeon, Loo Hay Lee, Peter Lendermann, Guodong Shao
Digital Twins have recently emerged as a major new area of innovation. Digital Twins are often found at the core of "smart" solutions that have also emerged as major areas of innovation. Modeling and Simulation (M&S) approaches create a model of a real

Circular Economy in the High-Tech World Workshop Report

December 14, 2021
Author(s)
Martin L. Green, Kelsea Schumacher
The National Institute of Standards and Technology (NIST) held a Technical Workshop on January 27 and 28, 2021 to assess the state and challenges of a Circular Economy (CE) in the High-Tech World. Scientists, researchers, and program managers in the CE

Considerations in applying neutron depth profiling to Li-ion battery research

December 14, 2021
Author(s)
Daniel Lyons, Jamie Weaver, Anne Co
Li distribution within micron-scale battery electrode materials is quantified with neutron depth profiling (NDP). This method allows determination of intra- and inter-electrode parameters such as lithiation efficiency, electrode morphology change and Li

The PROSPECT Experiment

December 14, 2021
Author(s)
Hans Pieter Mumm
The Precision Reactor Oscillation and Spectrum Experiment, PROSPECT, is designed to both perform a reactor-model independent search for eV-scale sterile neutrino oscillations at meter-long baselines and to make a precise measurement of the antineutrino

Ultra-broadband Kerr microcomb through soliton spectral translation

December 14, 2021
Author(s)
Gregory Moille, Edgar Perez, Jordan Stone, Ashutosh Rao, Xiyuan Lu, Tahmid Rahman, Yanne Chembo, Kartik Srinivasan
Broad bandwidth and stable microresonator frequency combs are critical for optical atomic clocks, optical frequency synthesis, dual comb spectroscopy, and a host of other applications that require accurate and precise optical frequency measurements in a

Calculation of likelihood ratios in forensic glass comparisons; introduction to a R code and Shiny app applied to existing background glass elemental databases

December 13, 2021
Author(s)
Anuradha Akmeemana, Ruthmara Corzo, Jodi Webb, Emily Haase, Jose Almirall
The use of standardized and robust analytical methods for the quantitative analysis of the elemental composition of glass fragments enables the characterization and comparison of glass as forensic evidence. This paper in- troduces a new R-based Shiny

Modification of the optical properties of molecular chains upon coupling to adatoms

December 13, 2021
Author(s)
Garnett W. Bryant, Marvin Muller, Miriam Kosik, Marta Pelc, Karolina Slowik, Andres Ayuela, Carsten Rockstuhl
Adsorbed atoms (adatoms) coupled to the matrix of solid state host materials as impurities can signi cantly modify their properties. Especially in low-dimensional materials, such as one-dimensional organic polymer chains or quasi-one-dimensional graphene

Solution Structures of Bacillus Anthracis Protective Antigen Proteins using Small Angle Neutron Scattering and Protective Antigen 63 Ion Channel Formation Kinetics

December 11, 2021
Author(s)
Ariel Michelman-Ribeiro, Kenneth A. Rubinson, Vitalii Silin, John J. Kasianowicz
We are studying the structures of bacterial toxins that form ion channels and catalyze macromolecule transport across membranes. For example, the crystal structure of the Staphylococcus aureus α-hemolysin (α-HL) channel in its functional state was

Cavity Entanglement and State Swapping to Accelerate the Search for Axion Dark Matter

December 10, 2021
Author(s)
K. Wurtz, B.M. Brubaker, Y. Jiang, Elizabeth Ruddy, Dan Palken, Konrad Lehnert
In cavity-based axion dark matter detectors, quantum noise remains a primary barrier to achieving the scan rate necessary for a comprehensive search of the axion parameter space. Here we introduce a method of scan rate enhancement in which an axion

Model for the Bipolar Amplification Effect

December 10, 2021
Author(s)
James Ashton, Stephen Moxim, Ashton Purcell, Patrick Lenahan, Jason Ryan
We present a model based on Fitzgerald-Grove surface recombination for the bipolar amplification effect (BAE) measurement, which is widely utilized in electrically detected magnetic resonance (EDMR) to measure reliability and performance-limiting interface

Mixture model analysis of Transition Edge Sensor pulse height spectra

December 9, 2021
Author(s)
Kevin J. Coakley, Jolene D. Splett, Thomas Gerrits
To calibrate an optical transition edge sensor, for each pulse of the light source (e.g., pulsed laser), one must determine the ratio of the expected number of photons that deposit energy and the expected number of photons created by the laser. Based on

Developing Cyber-Resilient Systems: A Systems Security Engineering Approach

December 8, 2021
Author(s)
Ronald S. Ross, Victoria Yan Pillitteri, Richard Graubart, Deborah Bodeau, Rosalie McQuaid
NIST Special Publication (SP) 800-160, Volume 2, Revision 1, focuses on cyber resiliency engineering—an emerging specialty systems engineering discipline applied in conjunction with systems security engineering and resilience engineering to develop
Displaying 4851 - 4875 of 73741
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