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Displaying 16301 - 16325 of 74049

The performance of structural steel beams subject to a localized fire

June 7, 2016
Author(s)
Lisa Choe, Selvarajah Ramesh, Chao Zhang, John L. Gross
This paper presents the results from the open flame, localized fire tests conducted on the 6.17-m long, simply supported W16×26 beam specimens. The cross sections at midspan (i.e. expected plastic hinge zone) of the beam specimen directly exposed to the

Derived PIV Application and Data Model Test Guidelines

June 6, 2016
Author(s)
David Cooper, Hildegard Ferraiolo, Ramaswamy Chandramouli, Nabil Ghadiali, Jason Mohler, Steven Brady
NIST Special Publication (SP) 800-157 contains technical guidelines for the implementation of standards-based, secure, reliable, interoperable Public Key Infrastructure (PKI)-based identity credentials that are issued for mobile devices by federal

FEA parameter verification for strain localization experiments

June 6, 2016
Author(s)
Mark A. Iadicola, Dilip K. Banerjee, Adam A. Creuziger
Multi-axial specimen geometry optimization through finite element analysis requires robust models that incorporate the critical physics of the experiment as well as a sufficiently robust constitutive law. This can be difficult even at low nominal strain

Opportunities for Inverse Analysis in Dynamic Tensile Testing

June 6, 2016
Author(s)
Steven P. Mates, Fadi Abu-Farha
Dynamic tensile testing using Kolsky Bar methods are used to assess crashworthiness of new structural materials needed for lightweight automotive design. High speed Digital Image Correlation (DIC) measurements routinely show that the strain experienced by

Phase-coherent microwave-to-optical link with a self-referenced microcomb

June 6, 2016
Author(s)
Pascal P. Del'Haye, Aurelien C. Coillet, Tara M. Fortier, Katja M. Beha, Daniel C. Cole, Hansuek Lee, Kerry J. Vahala, Scott B. Papp, Scott A. Diddams
The counting and control of optical cycles of light has become common with modelocked laser frequency combs. But even with advances in laser technology, modelocked laser combs remain bulk-component devices that are hand-assembled. In contrast, a frequency

Propagation of Error from Registration Parameters to Transformed Data

June 6, 2016
Author(s)
Mili Shah, Marek Franaszek, Geraldine Cheok
Methods to register two sets of data have existed for quite some time. However, these sets of data are rarely error-free. Consequently, any parameters obtained from a registration method will be affected by the error in the sets of data. Moreover, if these

Thermometry with Optomechanical Cavities

June 6, 2016
Author(s)
Thomas P. Purdy, Karen E. Grutter, Kartik Srinivasan, Nikolai Klimov, Zeeshan Ahmed, Jacob Taylor
Thermally-driven motion of a nanomechanical resonator may be employed as an absolute thermometer. We experimentally measure radiation pressure shot noise induced quantum correlations to absolutely calibrate the motional signal transduced onto an optical

Measurement of DNA repair protein apurinic/apyrimidinic endonuclease 1 (APE1) in human tissues by liquid chromatography/tandem mass spectrometry with isotope dilution

June 5, 2016
Author(s)
Pawel Jaruga, Guldal Kirkali, Prasad T. Reddy, Alessandro Tona, Bryant C. Nelson, Li Mengxia, David M. Wilson III, Erdem Coskun, M Miral Dizdar
Introduction DNA repair proteins may be used as biomarkers in disease etiology and therapy. Thus, the accurate determination of DNA repair protein expression and genotype in human tissues is of fundamental importance. Apurinic/apyrimidinic endonuclease 1

A Programmable Solar Simulator for Realistic Seasonal, Diurnal, and Air-Mass Testing of Multi-Junction Concentrator Photovoltaics

June 4, 2016
Author(s)
Tasshi Dennis, chanud yasanayake, Tim Gerke, Alex Payne, Lars Eng, brent fisher, Matt Meitl
We built a spectrally programmable super-continuum solar simulator and applied it to the realistic laboratory testing of a multi-junction concentrator solar cell. The novel simulator generated a broad range of illumination conditions representing changes

Saturation in Solar Cells from Ultra-Fast Pulsed-Laser Illumination

June 4, 2016
Author(s)
Tasshi Dennis
We investigate the potential saturation of a silicon solar cell in response to excitation from continuous-wave and ultra-fast pulsed lasers of equivalent average optical power. Because ultra-fast pulsed sources such as the super-continuum laser have very

Virtual Factory Based Data Analytics

June 4, 2016
Author(s)
Sanjay Jain, Guodong Shao, Seungjun Shin
The concept of a virtual factory representation and its use to support data analytics in multiple ways in manufacturing environment are proposed. The proposed virtual factory when implemented can facilitate improvements in manufacturing operations through

Extending Network Security into Virtualized Infrastructure

June 3, 2016
Author(s)
Ramaswamy Chandramouli, Larry Feldman, Gregory A. Witte
This bulletin summarizes the information presented in NIST Special Publication (SP) 800-125B, "Secure Virtual Network Configuration for Virtual Machine (VM) Protection." That publication provides an analysis of various virtual network configuration options

Orbital-Exchange and Fractional Quantum Number Excitations in an f-electron Metal Yb 2 Pt 2 Pb

June 3, 2016
Author(s)
L. S. Wu, W. J. Gannon, I. A. Zaliznyak, A. M. Tsvelik, M. Brockmann, J.-S. Caux, M. S. Kim, Yiming Qiu, John R. Copley, G. Ehlers, A. Podlesnyak, M. C. Aronson
Exotic quantum states and fractionalized magnetic excitations, such as spinons in one-dimensional chains, are generally viewed as belonging to the domain of 3d transition metal systems with spin 1/2. Our neutron scattering experiments on the 4f-electron

Quantum mechanical effects in plasmonic structures with subnanometre gaps

June 3, 2016
Author(s)
Wenqi Zhu, Ruben Esteban, Andrei G. Borisov, Jeremy J. Baumberg, Peter Nordlander, Henri J. Lezec, Javier Aizpurua, Kenneth B. Crozier
Metal nanostructures with nanogap features have proven highly effective as building blocks for plasmonic systems as they can provide a wide tuning range of operating frequencies and large near-field enhancements. It has recently become apparent that

Single-frequency 571 nm VECSEL for photoionization of magnesium

June 3, 2016
Author(s)
Shaun C. Burd, Tomi Leinonen, Jussi-Pekka Penttinen, David T. Allcock, Daniel H. Slichter, Raghavendra Srinivas, Andrew C. Wilson, Micrea Guina, Dietrich G. Leibfried
We report the development of an intracavity-frequency-doubled VECSEL emitting at 571 nm for photoionization of magnesium. The laser employs a V-cavity geometry with a gain chip at the end of one cavity arm and a lithium triborate (LBO) crystal for second
Displaying 16301 - 16325 of 74049
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