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Displaying 1176 - 1200 of 5218

A Snapshot of 118 Solid State Lighting Testing Laboratories' Capabilities

June 23, 2016
Author(s)
C Cameron Miller, Hannah Hasting, Maria Nadal
The National Institute of Standards and Technology (NIST) began to offer proficiency testing for Solid-State Lighting (SSL) products through a Measurement Assurance Program (MAP) in 2010. The MAP program provided proficiency testing complimenting

A precise instrument to determine the Planck constant, and the future kilogram

June 21, 2016
Author(s)
Darine El Haddad, Frank C. Seifert, Leon S. Chao, David B. Newell, Jon R. Pratt, Carl J. Williams, Stephan Schlamminger, Shisong Li
A precise instrument, called a watt balance, compares mechanical power measured in terms of the meter, the second and the kilogram to electrical power measured in terms of the volt and the ohm. A direct link between mechanical action and the Planck

Hydrodynamic Radius Fluctuations in Model DNA-Grafted Nanoparticles

June 16, 2016
Author(s)
Luis Fernando Vargas Lara, Francis W. Starr, Jack F. Douglas
We utilize molecular dynamics simulations (MD) and the path-integration program ZENO to quantify hydrodynamic radius (Rh) fluctuations of spherical symmetric gold nanoparticles (NPs) decorated with single-stranded DNA chains (ssDNA). In particular, we

Sub-Femto-g Free Fall for Space-Based Gravitational Wave Observatories: LISA Pathfinder Results

June 7, 2016
Author(s)
Michele Armano, Heather Audley, Gerard Auger, Jonathon Baird, Massimo Bassan, Pierre Binetruy, Michael Born, Daniele Bortoluzzi, Nico Brandt, Antonella Cavalleri, Andrea Cesarini, Giacomo Ciani, Giuseppe Congedo, Mike Cruise, Karsten Danzmann, Marcus de Deus Silva, Rosario De Rosa, Marc Diaz Aguilo, Luciano Di Fiore, Ingo Diepholz, George Dixon, Rita Dolesi, Luigi Ferraioli, Valerio Ferroni, Walter Fichter, Reinhold Flatscher, Antonio F. Garcia Marin, Cesar Garcia Marirrodriga, Ruediger Gerndt, Ferran Gibert, Domenico Giardini, Roberta Giusteri, Felipe Guzman, Aniello Grado, Catia Grimani, Adrien Grynagier, Jonathan Grzymisch, Ian Harrison, Gerhard Heinzel, Martin Hewitson, Daniel Hollington, David Hoyland, Mauro Hueller, Henri Inchauspe, Oliver Jennrich, Philippe Jetzer, Ulrich Johann, Bengt Johlander, Nico Karnesis, Natalia Korsakova, Christian Killow, Alberto Lobo, Ivan Lloro, Li Liu, Juan P. Lopez Zaragoza, Rolf Maarschalkerweerd, Davor Mance, Victor Martin, Luis Martin Polo, Joseph Martino, Fernando Martin Porqueras, Sean Madden, Ignacio Mateos, Paul McNamara, Jose Mendes, Luis Mendes, Anneke Monsky, Daniele Nicolodi, Miquel Nofrarias, Sarah Paczkowski, Michael Perreur-Lloyd, Antoine Petiteau, Paolo Pivato, Eric Plagnol, Pierre Prat, Ulrike Ragnit, Boutheina Rais, Juan Ramos Castro, Jens Reiche, David I. Robertson, Hans Rozemeijer, Francisco Rivas, Giuliana Russano, Josep Sanjuan, Paolo Sarra, Alexander Schleicher, Diana Shaul, Jacob Slutsky, Carlos Sopuerta, Ruggero Stanga, Frank Steier, Damien Texier, James I. Thorpe, Christian Trenkel, Hai-Bo Tu, Daniele Vetrugno, Stefano Vitale, Vinzenz Wand, Gudrun Wanner, Henry Ward, C Warren, Peter Wass, David Wealthy, William J. Weber, Lennart Wissel, Andreas Wittchen, Andrea Zambotti, Carlo Zanoni, Tobias Ziegler, Peter Zweifel
We report the first results of the LISA Pathfinder in-flight experiment. The results demonstrate that two free-falling reference test masses, such as those needed for a space-based gravitational wave observatory like LISA, can be put in free fall with a

Methods and Tools for Performance Assurance of Smart Manufacturing Systems

June 2, 2016
Author(s)
Deogratias Kibira, Katherine C. Morris, Senthilkumaran Kumaraguru
The emerging concept of smart manufacturing systems is defined in part by the introduction of new technologies that are promoting rapid and widespread information flow within the manufacturing system and surrounding its control. These systems can deliver

Minority-carrier dynamics in semiconductors probed by two-photon microscopy

May 31, 2016
Author(s)
Benoit H. Gaury, Paul M. Haney
Two-photon time-resolved photoluminescence has been recently applied to various semiconductor devices to determine carrier lifetime and surface recombination velocities. So far the theoretical modeling activity has been mainly limited to the commonly used

Multiple Sensor Detection of Process Phenomena in Laser Powder Bed Fusion

May 20, 2016
Author(s)
Brandon M. Lane, Eric P. Whitenton, Shawn P. Moylan
Laser powder bed fusion (LPBF) is an additive manufacturing (AM) process in which a high power laser melts metal powder layers into complex, three-dimensional shapes. LPBF parts are known to exhibit relatively high residual stresses, anisotropic
Displaying 1176 - 1200 of 5218
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