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NIST Authors in Bold

Displaying 13051 - 13075 of 74068

NIST Time and Frequency Bulletin

February 9, 2017
Author(s)
Kathryn R. Stephenson
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.

Believable Statements of Uncertainty

February 8, 2017
Author(s)
Richard M. Lindstrom
Nearly fifty years ago, two landmark papers appeared that should have cured the problem of ambiguous uncertainty statements in published data. Eisenhart’s paper in Science called for statistically meaningful numbers, and Currie’s Analytical Chemistry paper

Enabling photoemission electron microscopy in liquids via graphene-capped microchannel arrays

February 8, 2017
Author(s)
Hongxuan Guo, Evgheni Strelcov, Alexander Yulaev, Jian Wang, Narayana Appathurai, Stephen Urquhart, John Vinson, Subin Sahu, Michael P. Zwolak, Andrei Kolmakov
Photoelectron emission microscopy (PEEM) is a powerful tool to spectroscopically access dynamic surface processes at the nanoscale but is traditionally limited to ultra-high or moderate vacuum conditions. Here, we develop a novel graphene-capped

Investigating Bias in Maximum Likelihood Quantum State Tomography

February 8, 2017
Author(s)
Scott C. Glancy, Hilma M. Vasconcelos, George B. Silva
Maximum likelihood quantum state tomography yields estimators that, in spite of the fact that they are consistent, may have bias. The bias of an estimator is the difference between the expected value of the estimate and the true value of the parameter

The Impact of Data Dependency on Speaker Recognition Evaluation

February 8, 2017
Author(s)
Jin Chu Wu, Alvin F. Martin, Craig S. Greenberg, Raghu N. Kacker
The data dependency due to multiple use of the same subjects has impact on the standard error (SE) of the detection cost function (DCF) in speaker recognition evaluation. The DCF is defined as a weighted sum of the probabilities of type I and type II

Deconvoluting the Influences of 3D Structure on the Performance of Photoelectrodes for Solar-Driven Water Splitting

February 7, 2017
Author(s)
Daniel V. Esposito, Youngmin Lee, Heayoung Yoon, Paul M. Haney, Natalie Labrador, Thomas P. Moffat, A. A. Talin, Veronika A. Szalai
Abstract Three-dimensionally (3D) structured photoelectrodes offer a number of potential benefits for solar fuels production compared to conventional planar photoelectrodes, including decreased optical losses, higher surface area for catalysis, more facile

Reconstructing the Distributed Force on an Atomic Force Microscope Cantilever

February 7, 2017
Author(s)
Ryan Wagner, Jason P. Killgore
A methodology to reconstruct a distributed force applied to an atomic force microscopy (AFM) cantilever given the shape in which it vibrates is developed. This is accomplished by rewriting Bernoulli Euler beam theory such that the force on the cantilever

Accuracy of magnetic resonance based susceptibility measurements

February 6, 2017
Author(s)
Hannah E. Erdevig, Stephen E. Russek, Slavka Carnicka, Karl F. Stupic, Kathryn E. Keenan
Magnetic Resonance Imaging (MRI) is increasingly used to map the magnetic susceptibility of tissue to identify cerebral microbleeds associated with traumatic brain injury and pathological iron deposits associated with neurodegenerative diseases such as

Wind Effects on Flame Spread and Ember Spotting Near a Structure

February 6, 2017
Author(s)
Kathryn M. Butler, Erik L. Johnsson, Marco G. Fernandez, Mariusz Zarzecki, Glenn P. Forney, Eric Auth
In wildland-urban interface (WUI) fires, combustible materials pose a potential threat to contiguous or nearby structures. Flame spread and firebrand spotting have been studied in a series of field experiments involving fences and mulch beds under a

All-Dimensional H2-CO Potential: Validation with Fully Quantum Second Virial Coefficients

February 3, 2017
Author(s)
Giovanni Garberoglio, Piotr Jankowski, Krzysztof Szalewicz, Allan H. Harvey
We use a new high-accuracy all-dimensional potential to compute the cross second virial coefficient B12(T) between molecular hydrogen and carbon monoxide. The path-integral method is used to fully account for quantum effects. Values are calculated from 10
Displaying 13051 - 13075 of 74068