U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 13526 - 13550 of 73902

Atom-based RF electric field metrology above 100 GHz

July 16, 2017
Author(s)
Christopher L. Holloway, Matthew T. Simons, Joshua A. Gordon
While atom-based radio-frequency (RF) electric field probes have the potential to improve electric field measurements for a broad range of frequencies (from a few GHz to 100s of GHz) and field strengths (mV/m to kV/m), extending the measurement

Synchrophasor Sensor Networks for Grid Communication and Protection

July 15, 2017
Author(s)
Hamid Gharavi
This paper focuses primarily on leveraging synchronized current/voltage amplitudes and phase angles measurements to foster new categories of applications, such as improving the effectiveness of grid protection and minimizing outage duration for distributed

Fast-Responding Bio-Based Shape Memory Thermoplastic Polyurethanes

July 14, 2017
Author(s)
Zoran S. Petrovic, Jelena Milic, Fan Zhang, Jan Ilavsky
Fast response shape-memory polyurethanes were prepared from bio-based polyols, diphenyl methane diisocyanate and butane diol. The bio-based polyester polyols were synthesized from 9-hydroxynonanoic acid, a product obtained by ozonolysis of fatty acids

Measurement Challenges for 5G and Beyond

July 14, 2017
Author(s)
Catherine A. Remley, Jeffrey A. Jargon, Joshua A. Gordon, Alexandra E. Curtin, David R. Novotny, Christopher L. Holloway, Robert D. Horansky, Michael S. Allman, Jeanne T. Quimby, Camillo A. Gentile, Peter B. Papazian, Ruoyu Sun, Damir Senic, Jelena Senic, Matthew T. Simons, Maria G. Becker, Dylan F. Williams, Richard A. Chamberlin, Jerome G. Cheron, Ari D. Feldman, Paul D. Hale, Mohit S. Mujumdar, Nada T. Golmie
National Metrology Institutes (NMIs) around the world are charged with supporting industry through improved measurement science and by providing a traceability path to fundamental physical standards. Mobile wireless communications have become a ubiquitous

Quantitative characterization of gold nanoparticles by size-exclusion and hydrodynamic chromatography, coupled to inductively coupled plasma mass spectrometry and quasi-elastic light scattering

July 14, 2017
Author(s)
Leena M. Pitkanen, Antonio Montoro Bustos, Karen E. Murphy, Michael R. Winchester, Andre Striegel
The physicochemical characterization of nanoparticles, in general, and of gold nanoparticles (Au NPs), in particular, is of paramount importance for tailoring and optimizing the properties of these materials in specific applications, as well as for

Exposure to Engineered Nanomaterials: Impact on DNA Repair Pathways

July 13, 2017
Author(s)
Neenu Singh, Bryant C. Nelson, Leona D. Scanlan, Erdem Coskun, Pawel Jaruga, Shareen Doak
Some engineered nanomaterials (ENMs) may have the potential to cause damage to the genetic material in living systems. The mechanistic machinery functioning at the cellular/molecular level, in the form of DNA repair processes, has evolved to help

Receptor heterogeneity in optical biosensors

July 13, 2017
Author(s)
David A. Edwards, Ryan Evans
Many biochemical reactions in nature involve a stream of chemical reactants (ligand molecules) flowing over a surface to which other reactants (receptors) are confined. Scientists measure rate constants associated with these reactions in an optical

Summary of Workshop Large Outdoor Fires and the Built Environment

July 13, 2017
Author(s)
Samuel L. Manzello, Raphaele Blanchi, Michael Gollner, Sara McAllister, Eulalia Planas, Guillermo Rein, Pedro Reszka, Sayaka Suzuki
Large outdoor fires present risk to the built environment. In this workshop, presentations highlighted large outdoor fires throughout the world, and explored synergies between these fires. Specifically, each presentation provided an overview of the large

Assembly of Multi-flavored Two-Dimensional Colloidal Crystals

July 12, 2017
Author(s)
Nathan Mahynski, Hasan Zerze, Harold W. Hatch, Vincent K. Shen, Jeetain Mittal
We systematically investigate the assembly of binary multi-flavored colloidal mixtures in two dimensions. In these mixtures all pairwise interactions between species may be tuned independently. This introduces an additional degree of freedom over more

Complex Three-Dimensional Magnetic Ordering in Segmented Nanowire Arrays

July 12, 2017
Author(s)
Alexander J Grutter, Kathryn Krycka, Elena V. Tartakovskaya, Julie A. Borchers, K. Sai Madhukar Reddy, Eduardo Ortega, Arturo Ponce, Bethanie J. H. Stadler
The first comprehensive three-dimensional picture of magnetic ordering in high-density arrays of segmented FeGa/Cu nanowires is experimentally realized through the application of Polaris small angle neutron scattering. The competing energetics of dipolar

Cryogenic LED pixel-to-frequency mapper for kinetic inductance detector arrays

July 12, 2017
Author(s)
Jiansong Gao, Xiangliang Liu, W Guo, Wei L.F., Christopher M. McKenney, Bradley J. Dober, Tasha Billings, Johannes Hubmayr
We present a cryogenic wafer mapper based on light emitting diodes (LEDs) for mapping a large microwave kinetic inductance detector (MKID) array. In this scheme, an array of LEDs, addressed by DC wires and collimated through horns onto the detectors, are

Rapid Wafer-Scale Growth of Polycrystalline 2H-MoS2 by Pulsed Metalorganic Chemical Vapor Deposition

July 12, 2017
Author(s)
Berc Kalanyan, William A. Kimes, Ryan Beams, Stephan J. Stranick, Elias J. Garratt, Irina Kalish, Albert Davydov, Ravindra Kanjolia, James E. Maslar
High volume manufacturing of devices based on transition metal dichalcogenide (TMD) ultra-thin films will require deposition techniques that are capable of reproducible wafer-scale growth with monolayer control. To date, TMD growth efforts have largely

The Empirical Core-Chain Model

July 12, 2017
Author(s)
Boualem Hammouda, Man-Ho Kim
Small-angle scattering requires models to analyze the data. A core-chain model has been available to fit data from solutions of core-chain particles. When the core particles are "hard" with well-defined surface, that model has been found to work well and

The Open Academic Robot Kit

July 12, 2017
Author(s)
Raymond K. Sheh, Amy Eguchi, Haldun Komsuoglu, Adam Jacoff
The Open Academic Robot Kit (OARKit) lowers the barrier of entry into robotics research. A community driven initiative, it was developed in the context of the RoboCupRescue Robot League competition to advance the state of research in response robotics. All

VMEXT: A Visualization Tool for Mathematical Expression Trees

July 12, 2017
Author(s)
Moritz Schubotz, Howard Cohl, Bela Gipp, Norman Meuschke, Thomas Hepp
Mathematical expressions can be represented as a tree consisting of terminal symbols, such as identifiers or numbers (leaf nodes), and functions or operators (non-leaf nodes). Expression trees are an important concept to store and process mathematical

Calibration of night vision goggles: an SI-units-based measurement technique

July 11, 2017
Author(s)
Vyacheslav B. Podobedov, George P. Eppeldauer, Thomas C. Larason
A new night vision goggles (NVG) gain definition for the calibration process is proposed and evaluated. This definition is based on the radiance measurements at the input and output of the NVG. In contrast to the old definition which uses a non-
Displaying 13526 - 13550 of 73902
Was this page helpful?