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NIST Authors in Bold

Displaying 6826 - 6850 of 74303

NIST Time and Frequency Bulletin

March 20, 2020
Author(s)
Kelsey A. Rodriguez
The Time and Frequency Bulletin provides information on performance of time scales and a variety of broadcasts (and related information) to users of the NIST services.

Tuning between photon-number and quadrature measurements with weak-field homodyne detection

March 20, 2020
Author(s)
G Thekkadath, David Phillips, Jacob Bulmer, W.R. Clements, A. Eckstein, B.A. Bell, J Lugani, Adriana Lita, Sae Woo Nam, Thomas Gerrits, C.G. Wade, Ian Walmsley
Variable measurement operators enable optimization of strategies for testing quantum properties and for preparation of a range of quantum states. Here, we experimentally implement a weak-field homodyne detector that can continuously tune between performing

Voices of First Responders—Nationwide Public Safety Communication Survey Methodology: Development, Dissemination, and Demographics, Phase 2, Volume 1

March 20, 2020
Author(s)
Kristen Greene, Shanee T. Dawkins, Sandra S. Prettyman, Pamela J. Konkol, Mary F. Theofanos, Kevin C. Mangold, Susanne M. Furman, Michelle P. Steves
With the newly created Nationwide Public Safety Broadband Network (NPSBN), the public safety community is in the process of supplementing the use of land mobile radios (LMR) to a technology ecosystem that will include a variety of new communication tools

Doping of MoTe2 via surface charge-transfer in ambient air

March 19, 2020
Author(s)
Gheorghe Stan, Cristian Ciobanu, Sri Ranga Jai Likith, Asha Rani, Sergiy Krylyuk, Albert Davydov
Doping is a key process that facilitates the use of semiconductors for electronic and optoelectronic devices, by which the concentration and type of majority carriers (electrons or holes) can be modified controllably to achieve desired conduction

Effect of Elevated Temperature and Humidity on Fibers Based on 5-amino-2-(p-aminophenyl) benzimidazole (PBIA)

March 19, 2020
Author(s)
Amy E. Engelbrecht-Wiggans, Ajay Krishnamurthy, Lucas H. Kaplan, Amanda L. Forster, Thanh N. Hoang, Viviana Bentley
Traditionally, soft body armor has been made from materials such as poly(p-phenylene terephthalamide) (PPTA) and ultra-high molar mass polyethylene (UHMMPE). However, to diversify the fiber choices in the United States body armor market, copolymer fibers

Reduced-Order Modeling of Composite Floor Slabs in Fire. I: Heat-Transfer Analysis

March 18, 2020
Author(s)
Jian Jiang, Joseph Main, Jonathan Weigand, Fahim H. Sadek
This paper presents a reduced-order numerical modeling approach for the analysis of heat transfer in composite floor slabs with profiled steel decking exposed to fire effects. This approach represents the thick and thin portions of a composite slab with

Second harmonic generation in GaAs-on-insulator waveguides fabricated at the wafer-scale

March 18, 2020
Author(s)
Eric J. Stanton, Jeff Chiles, Nima Nader, Galan Moody, Nicolas Volet, Lin Chang, John E. Bowers, Sae Woo Nam, Richard Mirin
Second harmonic generation (SHG) is demonstrated with unprecedented efficiency for a single-pass device. Modal phase-matching in GaAs-on-insulator waveguides is used to convert a 2.0 µm TE pump to a 1.0 µm TM signal with an efficiency of 40 W−1 in a length

Coherent spin pumping in a strongly coupled magnon-magnon hybrid system

March 17, 2020
Author(s)
Yi Li, Wei Cao, Vivek P. Amin, Zhizhi Zhang, Jonathan Gibbons, Joseph Sklenar, John Pearson, Paul M. Haney, Mark D. Stiles, William E. Bailey, Valentine Novosad, Axel Hoffmann, Wei Zhang
We have experimentally identified coherent spin pumping acting as a dampinglike coupling in the magnon-magnon hybrid modes of permalloy/yttrium iron garnet (Py/YIG) bilayers. Using broadband ferromagnetic resonance, an ''avoided crossing" is observed well

A chip-scale optical frequency reference for the telecommunication band based on acetylene

March 16, 2020
Author(s)
Roy Zektzer, Matthew T. Hummon, Liron Stern, Yefim Barash, Noa Mazurski, John Kitching, Levy Uriel
Lasers precisely stabilized to known transitions between energy levels in simple, well-isolated quantum systems such as atoms and molecules are highly desired for myriad of applications ranging from precise measurements to optical communications. The

Automatic Recognition of Advanced Persistent Threat Tactics for Enterprise Security

March 16, 2020
Author(s)
Qingtian Zou, Anoop Singhal, Xiaoyan Sun, Peng Liu
Advanced Persistent Threats (APT) has become the concern of many enterprise networks. APT can remain undetected for a long time span and lead to undesirable consequences such as stealing of sensitive data, broken workflow, and so on. To achieve the attack

Design Considerations to Improve Charpy Instrumented Strikers

March 16, 2020
Author(s)
Nicholas Vlajic, Akobuije Chijioke, Enrico Lucon
Instrumented impact testing allows the applicability of conventional Charpy tests to be extended toward assessing mechanical properties such as dynamic fracture toughness and dynamic tensile properties. In this work, we present design considerations for
Displaying 6826 - 6850 of 74303