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Search Publications

NIST Authors in Bold

Displaying 9951 - 9975 of 73742

Spin-orbit coupled bosons in one dimension: Emergent gauge field and Lifshitz transition

May 16, 2019
Author(s)
Ian B. Spielman, William Cole, Junhyun Lee, Khan Mahmud, Yahya Alavirad, Jay Sau
We propose the two component spin-orbit coupled Bose liquid as a platform for studying quantum criticality in itinerant magnets. Apart from being pervasive in the solid state, quantum critical fluctuations in such itinerant systems often involve the

Stable Postfullerene Solar Cells via Direct C-H Arylation Polymerization. Morphology-Performance Relationships

May 16, 2019
Author(s)
Subhrangsu Mukherjee, Thomas Aldrich, Weigang Zhu, Lee J. Richter, Eliot Gann, Dean DeLongchamp, Antonio Facchetti, Ferdinand Melkonyan, Tobin Marks
The scope of the environmentally benign direct C-H arylation polymerization (DARP) process is validated and significantly extended in the synthesis of a high-performance benzodithiophene- based copolymer series, PBDT(Ar)-FTTE, with previously untested and

Structured Illumination Mueller Matrix Imaging

May 16, 2019
Author(s)
Joseph P. Angelo, Thomas Germer, Maritoni Litorja
We perform Mueller matrix imaging (MMI) of diffusely scattering phantoms under sinusoidal irradiance of varying spatial frequency. Quantitative polarimetric sensing via MMI completely characterizes a sample's polarimetric properties, while structured

Time delay measurements: estimation of the error budget

May 16, 2019
Author(s)
G.D. Rovera, Marco Siccardi, Stefania Romisch, M. Abgrall
The measurement of the time difference between two heterogeneous electrical sources is a necessary task in several branches of metrology. In particular the dissemination of Coordinated Universal Time (UTC) around the world requires one to quantify the

Electromagnetically induced transparency in inhomogeneously broadened solid media

May 15, 2019
Author(s)
Kumel H. Kagalwala, Fan Haoquan, Sergey Polyakov, Alan L. Migdall, Elizabeth A. Goldschmidt
We study, theoretically and experimentally, electromagnetically induced transparency (EIT) in two di erent solid-state systems. Unlike many implementations in homogeneously broadened media, these systems exhibit inhomogeneous broadening of their optical

Incommensurate Magnetism near Quantum Criticality in CeNiAsO

May 15, 2019
Author(s)
Shan Wu, W. A. Phelan, L. Liu, J. R. Morey, J. A. Tutmaher, J. C. Neuefeind, Ashfia Huq, Matthew B. Stone, M. Feygenson, David W. Tam, Benjamin A. Frandsen, Benjamin Trump, Cheng Wan, S. R. Dunsiger, Tyrel M. McQueen, Y. J. Uemura, Collin L. Broholm

On the Importance of Firebrand Processes in Large Outdoor Fires

May 15, 2019
Author(s)
Samuel L. Manzello
Firebrands are produced from combustion of both vegetative and structural fuels in large outdoor fires. It is well known that firebrand generation, transport, and ignition mechanisms result in rapid and potentially devastating fire spread processes in

Post-Quantum Cryptography and 5G Security: Tutorial

May 15, 2019
Author(s)
T. Charles Clancy, Robert W. McGwier, Lidong Chen
The Fifth Generation (5G) mobile broadband standards make a fundamental shift in cryptography. Prior generations based their security and privacy principally on symmetric key cryptography. The Subscriber Identity Module (SIM) and its successors contain a

Practical Guides for X-Ray Photoelectron Spectroscopy: First Steps in Planning, Conducting, and Reporting XPS Measurements

May 15, 2019
Author(s)
Cedric J. Powell, Donald R. Baer, Kateryna Artyushkova, Christopher R. Brundle, James E. Castle, Mark Engelhard, Karen Gaskell, John Grant, Richard Haasch, Matthew Linford, Peter Sherwood, Vincent Smentkowski, Alexander Shard
Over the past three decades, the use of x-ray photoelectron spectroscopy (XPS) in research and applications has grown to make XPS the most popular method of surface analysis. There has also been an increase in the number of new or inexperienced users along

Voices of First Responders Examining Public Safety Communication Problems and Requested Functionality: Findings from User-Centered Interviews, Phase 1, Volume 2.1

May 15, 2019
Author(s)
Shanee T. Dawkins, Yee-Yin Choong, Mary F. Theofanos, Kristen Greene, Susanne M. Furman, Michelle P. Steves, Sandra S. Prettyman
The public safety community has a unique opportunity to improve communication technology for incident response with the creation of the national public safety broadband network (NPSBN). Understanding the problems currently being experienced by first

10986-1 IEEE P4001-Progress Towards a Hyperspectral Standard

May 14, 2019
Author(s)
David Allen
Hyperspectral imaging is an innovative and exciting technology that holds incredible diagnostic, scientific and categorization power. Current industry innovation is a testament to the creative power and imagination of the diverse community seeking to

Identification of machine tool squareness errors via inertial measurements

May 14, 2019
Author(s)
Karoly Szipka, Andreas Archenti, Gregory W. Vogl, Alkan Donmez
The accuracy of multi-axis machine tools is affected to a large extent by the behaviour of the system's axes and their error sources. In this paper, a novel methodology using circular inertial measurements quantifies changes in squareness between two axes

Industrial Robot Accuracy Degradation Monitoring and Quick Health Assessment

May 14, 2019
Author(s)
Guixiu Qiao, Brian A. Weiss
Robot accuracy degradation monitoring and assessment are critical activities in many industrial robot applications, especially when it comes to maintaining the high accuracy required operations, such as welding, material removal, robotic drilling, and

NISTIR 7383, Selected Procedures for Volumetric Calibrations (2019 Ed)

May 14, 2019
Author(s)
Georgia L. Harris, Val R. Miller
This publication contains Good Measurement Procedures (GMP), Good Laboratory Procedures (GLP), and Standard Operating Procedures (SOP) for use in calibration laboratories performing volumetric calibrations. It includes procedures for Volume Transfer and

Spectrometer stray light can bias retrievals of solar-induced fluorescence

May 14, 2019
Author(s)
Loren Albert, Katherine Cushman, Yuqin Zong, David Allen, Luis Alonso, James Kellner
Remote sensing of solar induced chlorophyll fluorescence (SIF) promises a significant advance in our ability to quantify gross primary productivity across spatial scales. Because the fluorescence emission is usually 5 % of recorded canopy radiance

Uncertainty of particle size measurements using dynamic image analysis

May 14, 2019
Author(s)

Justin G. Whiting, Vipin N. Tondare, John H. Scott, Thien Q. Phan, M A. Donmez

Metal powder particle size and size distribution (PSD) are critical factors affecting powder layer density and uniformity in additive manufacturing processes. Among various existing measurement methods, dynamic image analysis (DIA) instruments are very

Unraveling Low Abundance Intimate Mixtures with Deep Learning

May 14, 2019
Author(s)
Ronald G. Resmini, Kevin Christiansen, David Allen
The high-confidence detection and identification of very low abundance, subpixel quantities of solid materials in nonlinear/intimate mixtures are still significant challenges for hyperspectral imagery (HSI) data analysis. We compare the ability of a

A Testbed for Quantum Communication and Quantum Networks

May 13, 2019
Author(s)
Lijun Ma, Abdella Battou, Xiao Tang, Oliver T. Slattery
The development of Quantum Networks is underway with significant acceleration in in recent years. Meanwhile. quantum scale devices and components such as single photon sources, detectors, memories and interfaces are ever readier to leave the laboratory

BABAR: Black Array of Broadband Absolute Radiometers for far infrared sensing

May 13, 2019
Author(s)
Christopher S. Yung, Nathan A. Tomlin, Cameron Straatsma, Joel Rutkowski, Erik Richard, Dave Harber, John H. Lehman, Michelle S. Stephens
Currently at NIST, there is an effort to develop a black array of broadband absolute radiometers (BABAR) for far infrared sensing. The linear array of radiometer elements is based on uncooled vanadium oxide (VOx) microbolometer pixel technology but with

Co 25 Fe 75 Thin Films with Ultralow Total Damping

May 13, 2019
Author(s)
Eric R. Edwards, Hans T. Nembach, Justin M. Shaw
We measure the dynamic properties of Co 25Fe 75 thin films grown by dc magnetron sputtering. Using ferromagnetic resonance spectroscopy, we demonstrate an ultralow total damping parameter in the out-of-plane configuration of 0.0013, whereas for the in

Comparison of Models for Heat Transfer in High-Density Fibrous Insulation

May 13, 2019
Author(s)
Sergio A. Carvajal, Edward Garboczi, Robert R. Zarr
This paper evaluates different models for calculating the effective thermal conductivity of fibrous insulation by comparing predicted values with certified values of Standard Reference Material 1450c, Fibrous Glass Board. The fiber diameter distribution
Displaying 9951 - 9975 of 73742
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