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Displaying 6401 - 6425 of 74061

Using Text Visualization to aid Analysis of Machine Maintenance Logs

April 30, 2020
Author(s)
Michael P. Brundage, Senthil K. Chandrasegaran, Xiaoyu Zhang, Kwan-Liu Ma
Maintenance and error logs for machines in manufacturing organizations are typically written as informal notes by operators or technicians working on the machines. These logs are written using a combination of common language and internally-used

2020 Numisheet benchmark study uniaxial tensile tests summary

April 29, 2020
Author(s)
Evan Rust, William E. Luecke, Mark Iadicola
This report describes the test equipment, process, analysis, and data file formats for the 2020 Numisheet benchmark study tensile testing of the four materials associated with the Numisheet conference benchmarks. The four materials include two steel alloys

Laser-free trapped-ion entangling gates with simultaneous insensitivity to qubit and motional decoherence

April 29, 2020
Author(s)
R. T. Sutherland, Raghavendra Srinivas, Shaun C. Burd, Hannah M. Knaack, Andrew C. Wilson, David J. Wineland, Dietrich Leibfried, David T. Allcock, Daniel Slichter, S. B. Libby
The dominant error sources for state-of-the-art implementations of laser-free trapped-ion entangling gates are decoherence of the qubit state and motion. The gate error from these decoherence mechanisms can be suppressed with additional control fields, or

Automation Support for Security Control Assessments: Software Vulnerability Management

April 28, 2020
Author(s)
Kelley L. Dempsey, Eduardo K. Takamura, Paul Eavy, George Moore
The NISTIR 8011 capability-specific volumes focus on the automation of security control assessment within each individual information security capability. The capability-specific volumes add tangible detail to the more general overview given in NISTIR 8011

Enhanced magnetization in proton irradiated Mn3Si2Te6 van der Waals crystals

April 28, 2020
Author(s)
L. M. Martinez, H. Iturriaga, R. Olmos, L. Shao, Y. Liu, Thuc Mai, C. Petrovic, Angela R. Hight Walker, S. R. Singamaneni
van der Waals (vdW) engineering of magnetism is a topic of increasing research interest in the community at present. We study the magnetic properties of quasi-two-dimensional layered vdW Mn3Si2Te6 (MST) crystals upon proton irradiation as a function of

Estimating the Impact of 16 CFR Part 1633 on Bed Fire Outcomes

April 28, 2020
Author(s)
Stanley W. Gilbert, David T. Butry, Richard G. Gann, Rick D. Davis
Effective July 1, 2007, the U.S. Consumer Product Safety Commission promulgated a Standard that would severely reduce the heat release rate and the early heat output from mattresses and foundations that had been ignited by a flaming ignition source

Ion transport across solid-state ion channels perturbed by directed strain

April 28, 2020
Author(s)
Alex Smolyanitsky, Alta Y. Fang, Andrei F. Kazakov, Eugene Paulechka
We combine quantum-chemical calculations and molecular dynamics simulations to consider aqueous ion flow across non-axisymmetric nanopores in monolayer graphene and MoS2. When the pore-containing membrane is subject to uniaxial tensile strains applied in

Optimization of the Pore Structures of MOFs for Record High Hydrogen Volumetric Working Capacity

April 28, 2020
Author(s)
Xin Zhang, Rui-Biao Lin, Jing Wang, Bin Wang, Bin Liang, Taner N. Yildirim, Jian Zhang, Wei Zhou, Banglin Chen
Metal-organic frameworks are promising materials for onboard hydrogen storage thanks to the tunable pore size, pore volume, and pore geometry. In consideration of pore structures, the correlation between the pore volume and hydrogen storage capacity is

Frequency stability of the mode spectrum of broad bandwidth Fabry-Perot interferometers

April 27, 2020
Author(s)
Jeffrey M. Jennings, Ryan C. Terrien, Connor Fredrick, Michael Grisham, Mark Notcutt, Samuel Halverson, Suvrath Mahadevan, Scott Diddams
When illuminated by a white light source, the discrete resonances of a Fabry- Perot interferometer (FP) provide a broad bandwidth, comb-like spectrum useful for frequency calibration. We report on the design, construction, and laboratory characterization

Index of refraction of germanium

April 27, 2020
Author(s)
John H. Burnett, Eric C. Benck, Simon G. Kaplan, Erik Stover, Adam Phenis
Measurements of the index of refraction of a sample of high-quality, single-crystal germanium using the minimum deviation refractometry method are presented for temperatures near 22 degC and for wavelengths in the range 2 micron to 14 micron. The standard

Prevention of Cooktop Ignition Using Detection and Multi-Step Machine Learning Algorithms

April 27, 2020
Author(s)
Wai Cheong Tam, Eugene Yujun Fu, Amy E. Mensch, Anthony P. Hamins, Christina Yu, Grace Ngai, Hong va Leong
This paper presents a study to examine the potential use of machine learning models to build a real-time detection algorithm for prevention of unattended cooking fires. 16 sets of time- dependent sensor signals were obtained from 60 normal/ignition cooking

Uncertainty analysis of adsorption measurements using commercial gravimetric sorption analyzers with simultaneous density measurement based on a magnetic-suspension balance

April 27, 2020
Author(s)
Xiaoxian Yang, Reiner Kleinrahm, Mark O. McLinden, Markus Richter
A commercial gravimetric sorption analyzer, which is based on a magnetic-suspension balance, was significantly improved to reduce the uncertainty in adsorption measurements. In a previous paper, we investigated the force-transmission error (FTE) of the

In Situ Neutron Scattering of Antibody Adsorption during Protein A Chromatography

April 26, 2020
Author(s)
Maria Papachristodoulou, James Doutch, Hoi Sang Beatrice Leung, Andy Church, Thomas Charleston, Luke A. Clifton, Paul Butler, Christopher J. Roberts, Daniel G. Bracewell
A deeper understanding of the nano and mesoscale structure of chromatographic adsorbents and the distribution of proteins within the media, is critical to a mechanistic understanding of separation processes using these materials. Characterisation of the

The Chemical Structure of a 30 cm Methanol Pool Fire

April 25, 2020
Author(s)
Ryan Falkenstein-Smith, Kunhyuk Sung, Jian Chen, Anthony Hamins
This study documents a series of time-averaged gas species measurements made along the centerline of a 30 cm methanol pool fires steadily burning in a quiescent environment. All gas species measurements are obtained using a Gas Chromatograph/ Mass

FROM SCAN STRATEGY TO MELT POOL PREDICTION: A NEIGHBORING-EFFECT MODELING METHOD

April 23, 2020
Author(s)
Zhuo Yang, Yan Lu, Ho Yeung, Sundar Krishnamurty
The quality of AM built parts is highly correlated to the melt pool characteristics. Hence melt pool monitoring and control can potentially improve AM part quality. This paper presents a neighboring-effect modeling method (NBEM) that uses scan strategy to

Flammable Refrigerant Safety

April 22, 2020
Author(s)
Gregory T. Linteris, Peter Sunderland
Most refrigerants currently in use have relatively high Global Warming Potential (GWP). For example, the GWPs of R-134a and R-410a are 1300 and 2088. Leaks to the atmosphere are common – typically about 10% of the total charge annually. This has motivated
Displaying 6401 - 6425 of 74061