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Displaying 701 - 725 of 2717

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

Modeling of Suspension Flow in a Pipe Geometry and Rheometers

May 18, 2016
Author(s)
Nicos Martys, Chiara F. Ferraris, William L. George
Abstract Measurement and prediction of the flow of suspensions like cement based materials represents a significant challenge for both the experimentalist and modeler. In this paper, results of a computational study of suspension flow in a pipe and a

Antenna Metrology 100-500 GHz: A New Approach

May 16, 2016
Author(s)
Perry F. Wilson, Joshua A. Gordon, David R. Novotny, Jeffrey R. Guerrieri
A typical near-field scanning range for antenna measurements is based on simple translation stages (planar) or stacked rotators (spherical), or both (cylindrical). Above 100 GHz problems arise in both specialized waveguide components, such as precision

Uncertainty of Error: The Error Dilemma

May 11, 2016
Author(s)
Charles D. Ehrlich
Measurement error has historically been defined in the metrology community as a difference of 'values,' usually as a difference between a 'measured value' and a 'reference value.' The reference value is sometimes considered to be a 'true value,' which is

National Voluntary Laboratory Accreditation Program (NVLAP) Calibration Laboratories

May 10, 2016
Author(s)
Barbara J. Belzer, Kari K. Harper, Thomas R. Hettenhouser, Warren R. Merkel
NIST Handbook 150-2, 2016 edition, presents the technical requirements and guidance for the accreditation of laboratories under the National Voluntary Laboratory Accreditation Program (NVLAP) Calibration Laboratories Program. The 2016 edition of NIST

Does Accuracy Matter to You?

May 1, 2016
Author(s)
Elizabeth J. Benham, Georgia L. Harris
This paper summarizes the importance of accuracy in measurement communications and provides reference to available resources for ensuring accuracy in written communications.

Diagnostics for geometric performance of machine tool linear axes

April 29, 2016
Author(s)
Gregory W. Vogl, M A. Donmez, Andreas Archenti
Machine tools degrade during operations, yet knowledge of degradation is elusive; accurately detecting degradation of linear axes is mainly a manual and time-consuming process. Thus, manufacturers need automated and efficient methods to diagnose the

Synchrotron X-Ray Microbeam Diffraction Measurements of Full Elastic Long Range Internal Strain and Stress Tensors in Commercial-Purity Aluminum Processed by Multiple Passes of Equal-Channel Angular Pressing

April 23, 2016
Author(s)
Thien Q. Phan, Lyle E. Levine, I-Fang Lee, Jonathan Z. Tischler, Ruqing Xu, Yi Huang, Terrance G. Langdon, Michael E. Kassner
Synchrotron X-ray microbeam diffraction was used to measure the full elastic long range internal strain and stress tensors of low dislocation density regions within the submicrometer grain/subgrain structure of equal-channel angular pressed (ECAP) AA1050

Engineered metal nanoparticles in the sub-nanomolar levels kill cancer cells

April 18, 2016
Author(s)
Yasmine C. Daniels, William A. MacCrehan, Shinichiro Muramoto, Gheorghe NMN Stan, Vitaly Vodyanoy, Oleg Pustovyy
Zinc and copper metal nanoparticles were produced from bulk metal rods by an underwater high-voltage discharge method. The metal nanoparticles, with estimated diameters of 1 nm to 2 nm, were determined to be more than 85 % non-oxidized. Exposure of rat RG2

Towards Establishing Compact Imaging Spectrometer Standards

March 31, 2016
Author(s)
David W. Allen, Elmer T. Slonecker, Ronald G. Resmini
Remote sensing science is currently undergoing a tremendous expansion in the area of hyperspectral imaging (HSI) technology. Spurred largely by the explosive growth of Unmanned Aerial Vehicles (UAV), sometimes called Unmanned Aircraft Systems (UAS), or
Displaying 701 - 725 of 2717
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