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Search Publications

NIST Authors in Bold

Displaying 3051 - 3075 of 75021

Dynamic vapor microextraction of ignitable liquid from casework containers

April 25, 2022
Author(s)
Jennifer Berry, Mary Gregg, Adam Friss, Amanda Koepke, Chris Suiter, Reta Newman, Megan Harries, Kavita Jeerage
Dynamic vapor microextraction (DVME) is a headspace concentration method that can be used to collect ignitable liquid (IL) from fire debris onto chilled adsorbent capillaries. Unlike passive headspace concentration onto activated carbon strips (ACSs) that

Photon Efficient Optical Time Transfer

April 24, 2022
Author(s)
Emily Caldwell, Laura Sinclair, William C. Swann, Nathan R. Newbury, Benjamin Stuhl, Jean-Daniel Deschenes
We present a novel frequency comb-based system for optical two-way time-frequency transfer to support very long distance free-space links between clocks. Our Photon-Efficient Agile Comb Optical Clock Synchronization (PEACOCS) system supports sub

Multimodal X-ray Probing of the Capacity Fade Mechanisms of Nickel Rich NMC - Progress and Outlook

April 22, 2022
Author(s)
Cherno Jaye, Daniel A. Fischer, Calvin Quilty, Patrick West, Wenzao Li, Mikaela Dunkin, Garrett Wheeler, Steven Ehrlich, Lu Ma, Esther Takeuchi, Kenneth Takeuchi, David Bock, Amy Marschilok
NMC is a commercially successful Li-ion battery cathode due to its high energy density; however, its delivered capacity must be intentionally limited to achieve capacity retention over extended cycling. To design next-generation NMC batteries with longer

Update of Atomic Data for the First Three Spectra of Actinium

April 22, 2022
Author(s)
Alexander Kramida
Abstract: The present article describes a complete re-analysis of all published data on observed spectral lines and energy levels of the first three spectra of actinium (Ac I–III). In Ac I, three previously determined energy levels have been rejected, 12

Exceptional points in lossy media lead to deep polynomial wave penetration with spatially uniform power loss

April 21, 2022
Author(s)
Alexander Yulaev, Sangsik Kim, Qing Li, Daron Westly, Brian Roxworthy, Kartik Srinivasan, Vladimir Aksyuk
Waves entering a spatially uniform lossy medium typically undergo exponential decay, arising from either the energy loss of the Beer–Lambert–Bouguer transmission law or the evanescent penetration during reflection. Recently, exceptional point singularities

High-fidelity indirect readout of trapped-ion hyperfine qubits

April 21, 2022
Author(s)
Stephen Erickson, Jenny Wu, Panyu Hou, Daniel Cole, Shawn Geller, Alexander Kwiatkowski, Scott Glancy, Emanuel Knill, Daniel Slichter, Andrew C. Wilson, Dietrich Leibfried
We propose and demonstrate a protocol for high-fidelity indirect readout of trapped ion hyperfine qubits, where the state of a 9Be+ qubit ion is mapped to a 25Mg+ readout ion using laser-driven Raman transitions. By partitioning the 9Be+ ground-state

Potentiometric Rotating Ring Disk Electrode (RRDE) Study of Interfacial pH during CO2 Reduction and H2 Generation in Neutral and Weakly Acidic Media

April 21, 2022
Author(s)
Thomas P. Moffat, Nicole Ritzert, David Raciti, Brian Tackett, Nicholas Brady
Electrocatalytic reduction of CO2 to CO in aqueous media offers an important path to more sustainable carbon utilization. Optimization of this process relies on a detailed understanding of the dynamics of boundary layer chemistry, e.g., pH, adjacent to the

Structures and Dynamics of Anionic Lipoprotein Nanodiscs

April 21, 2022
Author(s)
D. Sweeney, Susan T. Krueger, Kakali Sen, John Hackett
Nanolipoprotein particles known as nanodiscs (NDs) have emerged as versatile and powerful tools for the stabilization of mem-brane proteins permitting a plethora of structural and biophysical studies. Part of their allure is their flexibility to

Hardware-Enabled Security: Policy-Based Governance in Trusted Container Platforms

April 20, 2022
Author(s)
Michael Bartock, Murugiah Souppaya, Haidong Xia, Raghu Yeluri, Uttam Shetty, Brandon Lum, Mariusz Sabath, Harmeet Singh, Alaa Youssef, Gosia Steinder, Yu Cao, Jayashree Ramanathan
In today's cloud data centers and edge computing, attack surfaces have significantly increased, cyber attacks are industrialized, and most security control implementations are not coherent or consistent. The foundation of any data center or edge computing

Surveying Practicing Firearm Examiners

April 20, 2022
Author(s)
Nicholas Scurich, Brandon Garrett, Robert M. Thompson
The comparison of discharged bullets and shell casings by firearm examiners is one of the most conducted forensic analyses. However, little is known empirically about how practicing firearm examiners view and conduct their work, the range of conclusions

Trusted Cloud: Security Practice Guide for VMware Hybrid Cloud Infrastructure as a Service (IaaS) Environments

April 20, 2022
Author(s)
Murugiah Souppaya, Michael Bartock, Karen Scarfone, Donna Dodson, Daniel Carroll, Gina Scinta, Hemma Prafullchandra, Harmeet Singh, Raghuram Yeluri, Tim Shea, Carlos Phoenix, Robert Masten, Paul Massis, Jason Malnar, Michael Dalton, Anthony Dukes, Brenda Swarts, Rajeev Ghandi, Laura Storey, Rocky Weber, Jeff Haskins
A cloud workload is an abstraction of the actual instance of a functional application that is virtualized or containerized to include compute, storage, and network resources. Organizations need to be able to monitor, track, apply, and enforce their

Assessing Arsenic Species in Foods Using Regularized Linear Regression of the Arsenic K-edge X-ray Absorption Near Edge Structure

April 19, 2022
Author(s)
Evan Jahrman, Lee L. Yu, William P. Krekelberg, David Sheen, Thomas C. Allison, John L. Molloy
The toxicity and bioavailability of arsenic is heavily dependent on its speciation. Therefore, robust and accurate methods are needed to determine arsenic speciation profiles for materials related to public health initiatives, such as food safety. Here, X

Bipolar Waveform Synthesis with an Optically Driven Josephson Arbitrary Waveform Synthesizer

April 19, 2022
Author(s)
Justus Brevik, Dahyeon Lee, Anna Fox, Yiwei Peng, Akim Babenko, Joe Campbell, Paul Dresselhaus, Franklyn Quinlan, Samuel P. Benz
An array of Josephson junctions (JJs) was driven with photonically generated current pulses to synthesize a high-fidelity 1 kHz bipolar voltage waveform with a quantum-based amplitude that can be directly related to fundamental constants. A photodiode

Impact of Varying Side Chain Structure on Organic Electrochemical Transistor Performance: A Series of Oligoethylene Glycol-substituted Polythiophenes

April 19, 2022
Author(s)
Shinya Chen, Lucas Flagg, Jonathan Onorato, Lee J. Richter, Christine Luscombe, David Ginger
We study the electrochemical doping/dedoping kinetics, and the organic electrochemical transistor (OECT) performance of a series polythiophene homopolymers with ethylene glycol units in their side chains using both kosmotropic and chaotropic anion

Methodology for Measuring the Frequency Dependence of Multipath Channels Across the Millimeter-Wave Bands

April 19, 2022
Author(s)
Damla Guven, Ben Jamroz, Jack Chuang, Camillo Gentile, Rob Horansky, Kate Remley, Dylan Williams, Jeanne Quimby, Rod Leonhardt
Millimeter-wave (mmWave) communications promise Gigabits-per-second data rates thanks to the availability of large swaths of bandwidth between 10–100 GHz. Although cellular operators prefer the lower portions of the bands due to the general belief that

Q-Dependent Collective Relaxation Dynamics of Glass-Forming Liquid Ca 0.4 K 0.6 (NO 3 ) 1.4 Investigated by Wide-Angle Neutron Spin-Echo

April 19, 2022
Author(s)
Peng Luo, Yanqin Zhai, Peter Falus, Victoria Garcia Sakai, Monika Hartl, Maiko Kofu, Kenji Nakajima, Antonio Faraone, Y. Z
Employing high-intensity wide-angle neutron spin-echo spectroscopy, we measured the coherent intermediate scattering function of the prototypical ionic glass former Ca 0.4K 0.6(NO 3) 1.4 in the equilibrium and supercooled liquid state from 383 to 519 K

Quantum computing hardware for HEP algorithms and sensing

April 19, 2022
Author(s)
Corey Rae McRae
Quantum information science harnesses the principles of quantum mechanics to realize computational algorithms with complexities vastly intractable by current computer platforms. Typical applications range from quantum chemistry to optimization problems and

Thermal release tape-assisted semiconductor membrane transfer process for hybrid photonic devices embedding quantum emitters

April 19, 2022
Author(s)
Cori Haws, Biswarup Guha, Edgar Perez, Marcelo Davanco, Jin Dong Song, Kartik Srinivasan, Luca Sapienza
Being able to combine different materials allows taking advantage of different properties and device engineering that cannot be found or exploited within a single system. In the realm of quantum and nanophotonics, for instance, one might want to increase
Displaying 3051 - 3075 of 75021