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 7901 - 7925 of 73747

Over-The-Air Calibration of a Dual-Beam Dual-Polarized 28-GHz Phased-Array Channel Sounder

July 9, 2020
Author(s)
Sung Yun Jun, Derek Caudill, Jelena Senic, Camillo Gentile, Jack Chuang, Nada T. Golmie
This paper describes an over-the-air calibration procedure for the impulse response of a 28-GHz phased-array antenna channel sounder. The silicon-germanium (SiGe) antenna board is composed from two 8x8 planar arrays; each array can generate a distinct beam

Increasing the Coverage of a Mass Spectral Library of Milk Oligosaccharides Using a Hybrid- Search-Based Bootstrapping Method and Milks from a Wide Variety of Mammals

July 8, 2020
Author(s)
Concepcion A. Remoroza, Tytus D. Mak, Yuri A. Mirokhin, Sergey L. Sheetlin, Xiaoyu Yang, Stephen E. Stein, Power L. Michael, San Andres V. Joice, Yuxue Liang
This study significantly expands both the scope and method of identification for construction of a previously reported tandem mass spectral library of 74 human milk oligosaccharides (HMOs) derived from results of LC-MS/MS experiments. In the present work

Localized Excitons in NbSe2-MoSe2 Heterostructures

July 8, 2020
Author(s)
Jaydeep Joshi, Tong Zhou, Sergiy Krylyuk, Albert Davydov, Igor Zutic, Patrick M. Vora
Neutral and charged excitons (trions) in atomically-thin materials offer important capabilities for photonics, from ultrafast photodetectors to highly-efficient lightemitting diodes and lasers. Recent studies of van der Waals (vdW) heterostructures

Penetration Loss at 60 GHz for Indoor-to-Indoor and Outdoor-to-Indoor Mobile Scenarios

July 8, 2020
Author(s)
Sung Yun Jun, Derek Caudill, Jack Chuang, Peter B. Papazian, Anuraag Bodi, Camillo Gentile, Jelena Senic, Nada T. Golmie
This paper investigates the penetration loss of an office building in indoor-to-indoor and outdoor-to-indoor mobile scenarios. The measurements were collected using our 60-GHz double- directional switched-antenna channel sounder. During measurement, the

TREC-COVID: Rationale and Structure of an Information Retrieval Shared Task for COVID-19

July 8, 2020
Author(s)
Ellen Voorhees, Ian Soboroff, Tasmeer Alam, Kirk Roberts, William Hersh, Dina Demner-Fushman, Steven Bedrick, Kyle Lo, Lucy L. Wang
TREC-COVID is an information retrieval (IR) shared task initiated to support clinicians and clinical research during the COVID-19 pandemic. IR for pandemics breaks many normal assumptions, which can be seen by examining nine important basic IR research

Coherent optical nano-tweezers for ultra-cold atoms

July 7, 2020
Author(s)
Przemek Bienias, Sarthak Subhankar, Yang Wang, Tsz-Chun Tsui, Fred Jendrzejewski, Tobias Tiecke, Gediminas Juzeliunas, Liang Jiang, Steven Rolston, James V. Porto, Alexey Gorshkov

NIST Roadmap Toward Criteria for Threshold Schemes for Cryptographic Primitives

July 7, 2020
Author(s)
Luis Brandao, Michael S. Davidson, Apostol T. Vassilev
This document constitutes a preparation toward devising criteria for the standardization of threshold schemes for cryptographic primitives by the National Institute of Standards and Technology (NIST). The large diversity of possible threshold schemes, as

Sensitive neutron transverse polarization analysis using a 3He spin filter

July 7, 2020
Author(s)
Y.- Y. Jau, Wangchun Chen, Thomas R. Gentile, Daniel S. Hussey
We report an experimental implementation for neutron transverse polarization analysis that is able to detect a small angular change (10^-3 rad) of neutron spin orientation and works for both monochromatic and polychromatic neutron beams. Our approach

Achieving meV tunneling resolution in an in-operando scanning tunneling microscopy, atomic force microscopy, and magnetotransport system for quantum materials research

July 6, 2020
Author(s)
Johannes Schwenk, Sungmin Kim, Julian Berwanger, Fereshte Ghahari Kermani, Daniel T. Walkup, Marlou R. Slot, Son T. Le, W. G. Cullen, Steven R. Blankenship, Sasa Vranjkovic, Hans Hug, Young Kuk, Franz Giessibl, Joseph A. Stroscio
Research in new quantum materials require multi-mode measurements spanning length scales, correlations of atomic scale variables with macroscopic function, and with an ultimate energy resolution only obtainable at ultra-low temperatures, typically in a

Magnetic Phase Transitions and Spin Density Distribution in the Molecular Multiferroic System GaV 4 S 8

July 6, 2020
Author(s)
Rebecca Dally, William Ratcliff, Lunyong Zhang, Heung-Sik Kim, Markus Bleuel, J. W. Kim, Kristjan Haule, David Vanderbilt, Sang-Wook Cheong, Jeffrey Lynn
We have carried out neutron diffraction and small angle neutron scattering measurements on a high quality single crystal of the cubic lacunar spinel multiferroic, GaV 4S 8, as a function of magnetic field and temperature to determine the magnetic form

Obtaining More Energetic Modelocked Pulses From a SESAM Fiber Laser

July 6, 2020
Author(s)
Nathan Newbury, Laura Sinclair, Ian Coddington, Stefan Droste, Shaokang Wang, chaoran Tu, Seyed E. Jamali, Thomas Carruthers, Curtis Menyuk
Increasing the output power by increasing the pulse energy without increasing the noise level or decreasing the bandwidth is a major optimization goal for femtosecond fiber lasers that produce frequency combs. Here, we perform a computational study to

Reversible Room-Temperature Fluoride-Ion Insertion in a Tunnel-Structured Transition Metal Oxide Host

July 6, 2020
Author(s)
Cherno Jaye, Wasif Zaheer, Justin L. Andrews, Forrest P. Hyler, Conan Weiland, David A. Shapiro, Jinghua Guo, Jesus M. Velazquez, Sarbajit Banerjee, Abhishek Parija, Daniel Fischer
An energy storage paradigm orthogonal to conventional Li-ion battery chemistries can be conceptualized by employing anions as the primary charge carriers. F-ion conversion chemistries show promise but have limited cyclability as a result of the significant

Determination of molecular mass 302 polycyclic aromatic hydrocarbons in Standard Reference Material 1597a by reversed-phase liquid chromatography and constant energy synchronous fluorescence spectroscopy

July 3, 2020
Author(s)
Hugh V. Hayes, Walter B. Wilson, Anthony M. Santana, Andres D. Campiglia, Lane C. Sander, Stephen A. Wise
High-performance liquid chromatography with fluorescence detection is often used for the analysis of polycyclic aromatic hydrocarbons (PAH) in environmental extracts. Since fluorescence chromatograms are usually recorded at a single set of excitation and

Comparison of Chemometric Problems in Food Analysis Using Non-Linear Methods

July 2, 2020
Author(s)
Werickson Fortunato de Carvalho Rocha, Charles Prado, Niksa Blonder
Food analysis is a challenging analytical problem, often addressed using sophisticated laboratory methods that produce large data sets. Linear and non-linear multivariate methods can be used to process these types of datasets and to answer questions such

Crystal Chemistry and Phase Equilibria of the CaO- 1/2Ho2O3-CoOz System at 885 degC in Air

July 2, 2020
Author(s)
Winnie K. Wong-Ng, William J. Laws, Qingzhen Huang, Jie Hou, James A. Kaduk, Saul H. Lapidus, Lynn Ribaud
The phase diagram of the CaO-½Ho2O3-CoOz system was determined at 885 ºC in air. This diagram offers detailed compatibility relationships in the ternary oxide system that are essential for processing and for the understanding of thermoelectric properties
Displaying 7901 - 7925 of 73747
Was this page helpful?