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NIST Authors in Bold

Displaying 5751 - 5775 of 74068

Thickness-Dependent Permeability of Molecular Layer-By-Layer Polyamide Membranes

August 28, 2020
Author(s)
William D. Mulhearn, Vladimir Oleshko, Christopher Stafford
We present the thickness-dependent permeability of highly crosslinked polyamide (PA) membranes formed by a molecular layer-by-layer (mLbL) deposition process. The deposition allows for the synthesis of extremely smooth, uniform PA films of tunable

Camp Fire Preliminary Reconnaissance

August 27, 2020
Author(s)
Alexander Maranghides, William Mell, Steven Hawks, Eric D. Link, Christopher U. Brown, Cartier P. Murrill, Erin Ashley
The Camp Fire started in the early morning of November 8, 2018 in vegetative fuels to the northeast of Concow, California. Concow is an unincorporated community and census-designated place of primarily residential with a population of 762 in the Sierra

Observation of Quantum Anomalous Hall Effect and Exchange Interaction in Topological Insulator/Antiferromagnet Heterostructure

August 27, 2020
Author(s)
Lei Pan, Alexander Grutter, Peng Zhang, Xiaoyu Che, Tomohiro Nozaki, Alex Stern, Mike Street, Bing Zhang, Brian Casas, Qing L. He, Eun S. Choi, Steven M. Disseler, Dustin Gilbert, Gen Yin, Qiming Shao, Peng Deng, Yingying Wu, Xiaoyang Liu, Xufeng Kou, Sahashi Masashi, Xiaodong Han, Christian Binek, Scott Chambers, Jing Xia, Kang L. Wang
Integration of a quantum anomalous Hall insulator with a magnetically ordered material provides an additional degree of freedom through which we may control the resulting exotic quantum states. Here, we report an experimental observation of the quantum

Quasiuniversal Excess Entropy Scaling in Binary Supercooled Liquids

August 27, 2020
Author(s)
Ian H. Bell, Jeppe Dyre, Trond Ingebrigtsen
Transport coefficients, such as viscosity or diffusion coefficient, show significant dependence on density or temperature near the glass transition. Although several theories have been proposed for explaining this dynamical slowdown, the origin remains to

Report of the 104th National Conference on Weights and Measures

August 27, 2020
Author(s)
Yvonne A. Branden, Tina G. Butcher, Richard A. Harshman, Lisa Warfield, Gloria D. Lee, John W. Barton
The 104th Annual Meeting of the National Conference on Weights and Measures (NCWM) was held July 14 - 18, 2019, at the Hyatt Regency Milwaukee Hotel, Milwaukee, Wisconsin. The theme of the meeting was "Assuring Equity in the Marketplace: NIST and NCWM

Critical Current Density as a Performance Indicator for Gas-Evolving Electrochemical Devices

August 26, 2020
Author(s)
Jason K. Lee, ChungHyuk Lee, Benzhong Zhao, Jacob LaManna, Eli Baltic, Daniel S. Hussey, David L. Jacobson, Aimy Bazylak
Reaching high current densities is absolutely imperative for electrochemical energy conversion, from fuel cells to CO2 reduction. Here, we identify the existence of a performance indicator for gas-evolving electrochemical energy conversion devices: the

Layering of Magnetic Nanoparticles at Amorphous Magnetic Templates with Perpendicular Anisotropy

August 26, 2020
Author(s)
Apurve Saini, Julie Borchers, Sebastian George, Brian B. Maranville, Kathryn L. Krycka, Joseph Dura, Katharina Theis-Brohl, Max Wolff
We reveal the assembly of monodisperse magnetite nanoparticles of sizes 5 nm, 15 nm and 25 nm from dilute water-based ferrofluids onto an amorphous magnetic template with out-ofplane anisotropy. From neutron reflectometry experiments we extract density

Plasmon Lasers

August 26, 2020
Author(s)
Wenqi Zhu, Shawn M. Divitt, Matthew S. Davis, Cheng Zhang, Ting Xu, Henri Lezec, Amit Agrawal
Recent advancements in the ability to design, fabricate and characterize optical and optoelectronic devices at the nanometer scale have led to tremendous developments in the miniaturization of optical systems and circuits. Development of wavelength scale

Tissue Engineering Measurands

August 26, 2020
Author(s)
Greta Babakhanova, Carl Simon Jr., Deepika Arora
A measurand is defined as the quantity that one intends to measure. As tissue engineering research translates into medical products, companies must prepare regulatory filings that contain many different types of measurement data that are collected about

Effectiveness of dataset reduction in testing machine learning algorithms

August 25, 2020
Author(s)
Raghu N. Kacker, David R. Kuhn
Abstract— Many machine learning algorithms examine large amounts of data to discover insights from hidden patterns. Testing these algorithms can be expensive and time-consuming. There is a need to speed up the testing process, especially in an agile

Impact Analysis Tool for Interdependent Cyber Supply Chain Risks

August 25, 2020
Author(s)
Celia Paulsen, Jon M. Boyens, Jeffrey Ng, Kris Winkler, James Gimbi
As awareness of cybersecurity supply chain risks grows among federal agencies, there is a greater need for tools that evaluate the impacts of a supply chain-related cyber event. This can be a difficult activity, especially for those organizations with

Low damping and high thermal stability of Ru-seeded L10-phase FePd perpendicular magnetic thin films

August 25, 2020
Author(s)
Daniel B. Gopman, Xinjun Wang, Delin Zhang, Dingbin Huang, Ryan Wu, Dustin Lattery, K. Andre Mkhoyan, Xiojia Wang, Jian-Ping Wang
Bulk perpendicular magnetic anisotropy materials are proposed to be a promising candidate for exploring next-generation ultrahigh density and ultralow energy spintronic devices. In this work, we experimentally investigate the structural, thermal stability

NIST Cloud Computing Forensic Science Challenges

August 25, 2020
Author(s)
Martin Herman, Michaela Iorga, Ahsen Michael Salim, Robert H. Jackson, Mark R. Hurst, Ross Leo, Richard Lee, Nancy Landreville, Anand K. Mishra, Yien Wang, Rodrigo Sardinas
This document summarizes research performed by the members of the NIST Cloud Computing Forensic Science Working Group and aggregates, categorizes, and discusses the forensics challenges faced by experts when responding to incidents that have occurred in a

Parallel Prefetching for Canonical Ensemble Monte Carlo Simulations

August 25, 2020
Author(s)
Harold Wickes Hatch
In order to enable large-scale molecular simulations, algorithms must efficiently utilize multi-core processors that continue to increase in total core count over time with relatively stagnant clock speeds. Although parallelized molecular dynamics (MD)

X-ray Scattering Studies of Reverse Osmosis Materials

August 25, 2020
Author(s)
Qinyi Fu, Nisha Verma, Benjamin S. Hsiao, Francisco J. Medellin-Rodriguez, Peter Beaucage, Christopher Stafford, Benjamin M. Ocko
Scarcity of freshwater is becoming a world crisis. In a recent annual risk report, the World Economic Forum lists it in their greatest global risk category. Currently, about four billion people live under conditions of severe water scarcity for at least

2019 NIST/ITL Cybersecurity Program Annual Report

August 24, 2020
Author(s)
Patrick D. O'Reilly, Kristina G. Rigopoulos, Larry Feldman, Gregory A. Witte
During Fiscal Year 2019 (FY 2019), from October 1, 2018 through September 30, 2019, the NIST Information Technology Laboratory (ITL) Cybersecurity and Privacy Program successfully responded to numerous challenges and opportunities in security and privacy

Binary pseudorandom array test standard optimized for characterization of large field-of-view optical interferometers

August 24, 2020
Author(s)
Valeriy V. Yashchuk, Sergey Babin, Stefano Cabrini, Weilun Chao, Ulf Griesmann, Ian Lacey, Stefano Marchesini, Keiko Munechika, Carlos Pina-Hernandez, Allen L. Roginsky
Recently, a technique for calibrating the modulation transfer function (MTF) of a broad variety of metrology instrumentation has been demonstrated. This technique is based on test samples structured as one-dimensional binary pseudo-random (BPR) sequences
Displaying 5751 - 5775 of 74068