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Displaying 16151 - 16175 of 74202

Direct Measurements of 3D Structure, Chemistry, and Mass Density During the Induction Period of C3S Hydration

July 27, 2016
Author(s)
Qinang Hu, Mohammed Aboustait, Taehwan Kim, Tyler Ley, Jeffrey W. Bullard, Jay C. Hanan, Volker Rose, Robert Winarski
The reasons for the start and end of the induction period remain a mystery in cement hydration. One long-standing hypothesis is the importance of early hydration products on the surface of cement particles. However, because this material is not widely

Machine Condition Detection For Milling Operations Using Low Cost Ambient Sensors

July 27, 2016
Author(s)
Anantha Narayanan Narayanan, Alec Kanyuck, Satyandra K. Gupta, Sudarsan Rachuri
In recent years, sensor technology and data mining capabilities have advanced greatly, allowing advanced manufacturing enterprises to closely monitor their manufacturing operations. Conditions such as tool breakage and tool wear can be predicted by

NIST Handbook 133: Checking the Net Contents of Packaged Goods (2016 Ed.)

July 27, 2016
Author(s)
Linda D. Crown, David Sefcik, Lisa Warfield
This handbook has been prepared as a procedural guide for the compliance testing of net contents statements on packaged goods. Compliance testing of packaged goods is the determination of the conformance results of the packaging, distribution, and

Usability and Security Considerations for Public Safety Mobile Authentication

July 27, 2016
Author(s)
Yee-Yin Choong, Joshua M. Franklin, Kristen Greene
There is a need for cybersecurity capabilities and features to protect the Nationwide Public Safety Broadband Network (NPSBN). However, cybersecurity requirements should not compromise the ability of first responders to complete their missions. In addition

Design of a Table-Top Watt Balance

July 26, 2016
Author(s)
Stephan Schlamminger, Jon R. Pratt, David B. Newell, Frank C. Seifert, Michael Liu, Leon S. Chao, Luis Manuel Pea Prez, Shisong Li, Darine El Haddad
Measurements of the Planck constant with watt balances using 1 kg masses have achieved relative standard uncertainties below 2 x 10-8. Having established a metrological link between the kilogram and this fundamental constant of nature, a redefinition of

Re-entrance of Poly(N,N-diethylacrylamide) in D 2 O/d-Ethanol Mixture at 27degC

July 26, 2016
Author(s)
Di Jia, Taisen Zuo, Sararh Rogers, He Cheng, Boualem Hammouda, Charles C. Han
The re-entrance of poly(N,N-diethyl acrylamide) (PDEA)in D 2O/d-ethanol mixtures (i.e., the coil-to-globule-to-coil transition) has been observed at 27 °C by small-angle neutron scattering (SANS). PDEA has a lower critical solution temperature (LCST) phase

Thermal Exposure Sensor for Fire Fighters - full-Scale Performance Experiments

July 26, 2016
Author(s)
Nelson P. Bryner, Atul Deshmukh, John Casali, Jeff Lancaster, Roy A. McLane
During structural fire fighting suppression operations, fire fighters wear protective gear to insulate them from the high temperature environment including hot combustion gases, burning surfaces, and thermal radiation. Current turnout gear insulates the

Thermal Exposure Sensor for Fire Fighters - Laboratory-Scale Performance Experiments

July 26, 2016
Author(s)
Nelson P. Bryner, Atul Deshmukh, John Casali, Jeff Lancaster, Roy A. McLane
During structural fire fighting operations, fire fighters wear protective gear to insulate them from high temperature environments, including hot combustion gases, burning surfaces, and thermal radiation. Current turnout gear insulates the fire fighter to

A New Molecular Model for Lithium's Biological Interactions

July 25, 2016
Author(s)
John Marino, Katharine T. Briggs, Gary G. Giulian, Joe Kao, Gong Li
Lithium carbonate, a drug for the treatment of Bipolar Disorder, provides mood stability to mitigate recurrent episodes of mania and/or depression. Despite its long term and widespread use, the mechanism by which lithium acts to elicit these psychological

Chemical kinetic model uncertainty minimization through laminar flame speed measurements

July 25, 2016
Author(s)
Okjoo Park, Peter S. Veloo, David Sheen, Yujie Tao, Fokion N. Egolfopoulos, Hai Wang
Laminar flame speed measurements were carried for mixture of air with eight C3-4 hydrocarbons (propene, propane, 1,3-butadiene, 1-butene, 2-butene, iso-butene, n-butane, and iso-butane) at the room temperature and ambient pressure. Along with C1-2

Durability of Carbon Nanotube Polymer-Fiber Composites

July 25, 2016
Author(s)
Aaron Forster, James Liddle, Donald Hunston, Ajay Krishnamurthy
Significant composite strength improvements have been achieved using highly aligned and dense carbon nanotube fibers with low resin concentration, but these remain ac-cessible only to aerospace applications [1]. The potential of carbon nanotubes for high

Effects of Wind Speed and Angle on Fire Spread along Privacy Fences

July 25, 2016
Author(s)
Erik L. Johnsson, Alexander Maranghides
A series of experiments was conducted to examine fire spread along fences subjected to wind at various speeds and angles. Specifically, sections of western redcedar, California redwood, or vinyl privacy fences were ignited with a burner. Wind fields of 9 m
Displaying 16151 - 16175 of 74202
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