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Search Publications

NIST Authors in Bold

Displaying 9251 - 9275 of 73697

Degradation of sunglasses filters after long-term irradiation within solar simulator

September 18, 2019
Author(s)
Deborah Jacobs, Mauro Masili, Fernanda O. Duarte, Liliane Ventura, Christopher C. White
In our previous investigations on sunglasses standards, limits and requirements have been suggested for ocular safety. In this paper we evaluate the degradation of the lenses (category and ultraviolet protection) as sunglasses are exposed to solar

Improving Reproducibility in Research: The Role of Measurement Science

September 18, 2019
Author(s)
Robert J. Hanisch, Anne L. Plant, Ian Gilmore
We present here a summary of a workshop held 1-3 May 2018 at the National Physical Laboratory, Teddington, UK in which the focus was how the national metrology institutes of the world might help to address challenges in reproducibility of research. The

Multi-functional integrated photonics in the mid-infrared with suspended AlGaAs on silicon

September 18, 2019
Author(s)
Jeff Chiles, Nima Nader, Eric Stanton, Daniel Herman, Galan Moody, Biswarup Guha, Kartik Srinivasan, Scott Diddams, Ian Coddington, Nathan Newbury, Jeff Shainline, Sae Woo Nam, Richard Mirin, Jiangang Zhu, Juliet Gopinath, Connor Fredrick
The microscale integration of mid- and longwave-infrared photonics could enable the development of fieldable and reliable chemical sensors. The choice of material platform immediately determines the strength and types of optical nonlinearities available

On-chip Silicon Photonics Radiation Sensors

September 18, 2019
Author(s)
Nikolai N. Klimov, Zeeshan Ahmed, Lonnie T. Cumberland, Ileana M. Pazos, Ronald E. Tosh, Ryan P. Fitzgerald
We have examined the impact of cobalt-60-ray radiation up to 1 megagray (MGy) absorbed dose on silicon photonic devices. We do not find any systematic impact of radiation on passivated devices, indicating the durability of passivated silicon devices

The Molybdenum K-shell X-ray Emission Spectrum

September 18, 2019
Author(s)
Marcus H. Mendenhall, Lawrence T. Hudson, Csilla I. Szabo-Foster, Albert Henins, James P. Cline
Abstract We present newly measured spectra of the X-ray emission of a molybdenum metal anode subject to electron bombardment, using a very high dispersion silicon double-crystal spectrometer. The measurement includes the dipole-allowed KL, KM, and KN

Anharmonic Acoustic Phonons and A-site Critical Fluctuations in the Lead Halide Perovskite CsPbBr 3

September 17, 2019
Author(s)
M. Songvilay, Nathan Giles-Donovan, M. Bari, Z.-G. Ye, J. L. Minns, M. A. Green, Guangyong Xu, Peter M. Gehring, K. Schmalzl, William D. Ratcliff, Craig Brown, D. Chernyshov, W. van Beek, Sandy Cochran, Christopher Stock
We apply neutron spectroscopy to investigate the transverse acoustic phonons in the lead halide CsPbBr 3 near the three zone boundaries of the cubic Pm3m Brillouin zone at QX = (2,1/2,0), Q M = (3/2,1/2,0), and Q R = (1/2,1/2,3/2). CsPbB r3 undergoes two

Manufacturing USA Annual Report, FY 2018

September 17, 2019
Author(s)
Robert G. Rudnitsky, Michael F. Molnar, Frank W. Gayle, Hong Liang, Lisa J. Fronczek, Said Jahanmir, Zahraha S. Brunner
This annual report documents the progress of the Manufacturing USA program in meeting its goals and describes the major accomplishments of the Manufacturing USA institutes in fiscal year 2018.

IREX Validation Dataset 2019

September 16, 2019
Author(s)
James R. Matey, George W. Quinn, Patrick J. Grother
The IRis EXchange (IREX) program at NIST employs best measurement practices to support the development, standardization, and interoperability of iris-based technology through ongoing evaluations of that technology; IREX evaluations provide information that

Platform-Independent Debugging of Physical Interaction and Signal Flow Models

September 16, 2019
Author(s)
Mehdi Dadfarnia, Raphael Barbau
Systems engineering tools are used to organize development activities of a wide variety ofen gineers, many of which develop their own discipline-specific simulation models. To increase the efficiency of this process, systems modeling tools have been

Ceramic Materials and Powder Diffraction

September 15, 2019
Author(s)
Winnie K. Wong-Ng
Contrary to general public’s perception of ceramics as primarily encompassing art work, table ware, porcelain enamels, tiles, and sanitary ware, ceramics cover a broad range of materials and applications. We have attempted to categorize these materials in

Dual Cavity Refractivity measurements using a single Laser

September 15, 2019
Author(s)
Kevin O. Douglass, Jacob Edmond Ricker, Stephen Eckel, Jay H. Hendricks
We present a method for measuring refractivity-based pressure changes using a dual Fabry-Perot cavity utilizing a single laser with off-set sideband locking to the second cavity. Preliminary data illustrate the utility of the technique.

Experimental and numerical study of multi-phase medium-Mn TWIP-TRIP steel: influences of strain rate and phase constituents

September 15, 2019
Author(s)
William E. Luecke, Y. Liu, Jake Benzing, X. Zhang, A. Dutta, D. Ponge, C. Oksay, D. Raabe, J.E. Wittig
The present work investigates the room temperature tensile properties of a Fe-12Mn-3Al-0.05C (weight %) twinning- and transformation-induced plasticity (TWIP-TRIP) steel from quasi-static to low-dynamic strain rates ( ̇ = 10-4 /s to  ̇ = 102 /s). The

Experimental Variation of Magnification Calibration for Localization Microscopy

September 15, 2019
Author(s)
Craig R. Copeland, Bojan R. Ilic, Samuel M. Stavis
We study the experimental variation of a localization microscope due to temporal and thermal factors, enabling elucidation of the discrepancy between transillumination brightfield and epi-illumination fluorescence of an aperture array for magnification
Displaying 9251 - 9275 of 73697
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