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Displaying 11151 - 11175 of 73832

Advanced Maintenance in Manufacturing: Costs and Benefits

September 23, 2018
Author(s)
Douglas Thomas
The costs of maintenance and the potential effect on maintenance costs from adopting predictive maintenance techniques is not well documented at the national level. A number of data items need to be collected to estimate the costs and losses associated

Methodology for evaluating and comparing fluorescence measurement capabilities: Multi-site study of 23 flow cytometers

September 23, 2018
Author(s)
David R. Parks, Wayne A. Moore, Ryan Brinkman, Yong Chen, Danilo Condello, Faysal E. Khettabi, John P. Nolan, Stephen P. Perfetto, Doug Redelman, Josef Spidlen, Jonathan V. Dyke, Lili Wang, James C. Wood
We developed measurement methods and analysis procedures to perform inter-instrument comparisons and used them to evaluate and compare the fluorescence measurement capabilities among 23 cytometers in 9 laboratories selected to provide a range of

MCDC-Star An Open-source MC/DC Measurement Tool

September 22, 2018
Author(s)
Raghu N. Kacker, David R. Kuhn, Eric Wong
Applying MC/DC criterion to real-world projects can be expensive due to not only the cost of commercial tools, but also the difficulty of generating test cases to achieve high coverage. To lower the expense from both aspects, this paper presents an easy-to

Nanoscale Hygromechanical Behavior of Lignin

September 22, 2018
Author(s)
Kristen M. Hess, Jason Killgore, Wil Srubar
The nanoscale hygromechanical behavior of lignin is presented in this work. Three atomic force microscopy experimental methods were used to correlate moisture sorption of lignin to its mechanicalbehavior. First, sorption isotherms were established using

Approaches for the Quantitative Analysis of Oxidation State in Cerium Oxide Nanomaterials

September 21, 2018
Author(s)
Christopher M. Sims, Russell A. Maier, Aaron C. Johnston-Peck, Justin M. Gorham, Vincent A. Hackley, Bryant C. Nelson
Cerium oxide nanomaterials (nanoceria, CNMs) are receiving increased attention from the research community due to their unique chemical properties, most prominent of which is their ability to alternate between the Ce3+ and Ce4+ oxidation states. While many

Dietary Supplement Laboratory Quality Assurance Program: Exercise N Final Report

September 21, 2018
Author(s)
Chuck Barber, Melissa M. Phillips, Kate Rimmer, Laura J. Wood, Steven J. Christopher
The NIST Dietary Supplement Laboratory Quality Assurance Program (DSQAP) was established in collaboration with the National Institutes of Health (NIH) Office of Dietary Supplements (ODS) in 2007 to enable members of the dietary supplement community to

Improving Measurement for Smokestack Emissions - Workshop Summary

September 21, 2018
Author(s)
Rodney A. Bryant, Aaron N. Johnson, John D. Wright, Tamae M. Wong, James R. Whetstone, Michael R. Moldover, Iosif I. Shinder, Scott Swiggard, Chris Gunning, David Elam, Tom Martz, Eric Harman, David Nuckols, Liang Zhang, Woong Kang, Salvator Vigil
The complex flow conditions inherent in power plant smokestacks make accurate flow measurements challenging, which in turn limits the accuracy of hazardous emissions measurements. While stack composition measurements are assessed daily via comparison to a

Natural Alteration of 6Li Neutron Shielding Glass

September 21, 2018
Author(s)
Jamie L. Weaver, Danyal J. Turkoglu
Li-6 alumino-silicate glass, a neutron shielding material, has been studied to determine if and to what extent it alters under natural conditions. Analyses included neutron depth profiling, prompt gamma activation analysis, x-ray diffraction, and scanning

On the mechanisms and the characterization of the pulsed electron grafting of styrene onto poly(tetrafluoroethylene-co-hexafluoropropylene) to synthesize a polymer electrolyte membrane

September 21, 2018
Author(s)
Byung N. Kim, Alia Weaver, Marina Chumakov, Ileana M. Pazos, Dianne L. Poster, Karen Gaskell, Do H. Han, Gunther Scherer, Michael A. Yandrasits, Byung C. Lee, Mohamad Al-Sheikhly
During the pulsed-electron beam direct grafting of neat styrene onto poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) substrate, the radiolytically-produced styryl and carbon-centered FEP radicals undergo various desired and undesired competing

Structure, Rheology, and Microrheology of Wormlike Micelles made of PB-PEO Diblock Copolymers

September 21, 2018
Author(s)
Antonio Tavera-Vazquez, Brisa Arenas-Gomez, Cristina Garza, Yun Liu, Rolando Castillo
A diblock copolymer made of poly(but-2-ene-1,4-diyl)-block-poly(oxyethylene), with a degree of polymerization of the polybutadiene and polyethylene blocks of 37 and 57, respectively, self-assembles in water as worm-like micelles determined with small angle

Atom Probe Tomography Analysis of the Reference Zircon GJ-1: A Round-Robin Experiment

September 20, 2018
Author(s)
Ann C. Chiaramonti Debay, Paul T. Blanchard, Alexandre La Fontaine, Florent Exertier, Sandra Piazolo, Elena Belousova, Zirong Peng, Baptiste Gault, David W. Saxey, Denis Fougerouse, Steven Reddy, Julie Cairney
In recent years, atom probe tomography (APT) has been increasingly used to study minerals, and in particular Zircons. The mineral Zircon (ZrSiO4) is ideally suited for geochronology by utilising the U-Th-Pb isotope systems, and trace element compositions

Defect-Driven Extreme Magnetoresistance in an I-Mn-V Semiconductor

September 20, 2018
Author(s)
Junjie Yang, Aaron Wegner, Craig Brown, Despina Louca
Semiconducting electronics have been transformed in part due to progress in spin polarized transport. Central to modern day spintronics, contemporary magnetoresistive components are based on ferromagnetic multilayers. New directions in the search for the

A Method for Measuring the Quantity of Drugs on Surfaces in a Forensic Laboratory

September 19, 2018
Author(s)
Edward R. Sisco, Marcela N. Najarro, Amber Burns
While background studies have been commonplace in many occupational fields for a long time, attempts to understand the chemical background in forensics labs has been largely understudied. However, given the increasing sensitivity of instrumentation and

An optical Bragg scattering readout for simultaneous detection of all low-order mechanical modes of gallium nitride nanowires in nanowire arrays

September 19, 2018
Author(s)
Kristine A. Bertness, John P. Houlton, Matthew D. Brubaker, Charles T. Rogers
We report the use of optical Bragg scattering and homodyne interferometry to simultaneously measure all the first order cantilever-mode mechanical resonance frequencies and quality factors (Q) of gallium nitride nanowires (GaN NWs) in 100 NW periodic
Displaying 11151 - 11175 of 73832
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