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Displaying 11401 - 11425 of 73893

Photochemical Dynamics of a Trimethyl-Phosphine Derivatized [FeFe]-Hydrogenase Model Compound

August 17, 2018
Author(s)
Edwin J. Heilweil, Rachel L. Meyer, Tara M. Biser, Anet D. Zhandosova, Christopher J. Stromberg
Coupling photosensitizers with [FeFe]-hydrogenase model compounds can potentially create light- driven catalysts for production of hydrogen gas from acidic protons. Though there have been many studies on the synthesis, kinetics, and reaction mechanisms of

A Reference Material for Evaluation of Cs-137 Radiochronometric Measurements

August 16, 2018
Author(s)
Kevin B. Lavelle, Richard Essex, Jeffrey T. Cessna, Kevin P. Carney, Cole R. Hexel
A new nuclear forensic reference material has been characterized as a standard for radiochronometric determination of the model purification date for 137Cs sources. The purification date of a radioactive source is a potentially diagnostic nuclear forensic

Initiation of flash boiling of multicomponent miscible mixtures with application to transportation fuels and their surrogates

August 16, 2018
Author(s)
Charles T. Avedisian, Kyle Skyllingstad1, Richard E. Cavicchi, Corinne Lippe, Michael J. Carrier
This paper presents methodologies to predict thermodynamic conditions that initiate flash boiling by spontaneous nucleation of liquids consisting of hundreds of miscible liquids and their lower order surrogate mixtures. The methods are illustrated with a

Readout architectures for superconducting nanowire single photon detectors

August 16, 2018
Author(s)
Adam N. McCaughan
Advances in the development of superconducting nanowire single photon detectors (SNSPD) have guaranteed that they remain a leading photon detection technology in applications such as quantum information, low-power optical communications, and the life

Spinor Bose-Einstein condensate phase-sensitive amplifier for SU(1,1) interferometry

August 16, 2018
Author(s)
Jonathan Wrubel, Arne Schwettmann, Donald P. Fahey, Glassmann Zachary, Heywon Pechkis, Paul Griffin, Ryan Barnett, Eite Tiesinga
The SU(1,1) interferometer was originally conceived as a Mach-Zehnder interferometer with the beam-splitters replaced by parametric amplifiers. The parametric amplifiers produce states with correlations that result in enhanced phase sensitivity. F = 1

A theoretically based departure function for multi-fluid mixture models

August 15, 2018
Author(s)
Ian H. Bell, Andreas Jaeger, Cornelia Breitkopf
Multi-fluid models for highly accurate multiparameter equations of state have been applied very successfully in the past years in order to accurately model thermophysical properties of mixtures. However, the predictive capabilities of this type of mixture

Nanoparticle Manufacturing - Heterogeneity through Processes to Products

August 15, 2018
Author(s)
Samuel M. Stavis, Jeffrey Fagan, Michael Stopa, James Alexander Liddle
Commercial products are now making use of the unique properties of nanoscale particles. However, common challenges of making nanoparticles into products still limit their impact. In this article, we review recent advances in nanoparticle manufacturing in

Spatial Dimensions in Atomic Force Microscopy: Instruments, Effects, and Measurements

August 15, 2018
Author(s)
Ronald G. Dixson, Ndubuisi G. Orji, Ichiko Misumi, Gaoliang Dai
Atomic force microscopes (AFMs) are commonly and broadly regarded as being capable of three dimensional imaging. However, conventional AFMs suffer from both significant functional constraints and imaging artifacts that render them less than fully three

Chip Scale Atomic Devices

August 14, 2018
Author(s)
John E. Kitching
Chip-scale atomic devices combine elements of precision atomic spectroscopy, silicon micromachining and advanced diode laser technology to create compact, low-power and manufacturable instruments with high precision and stability. We review the design

Assessing Radiation Hardness of Silicon Photonic Sensors.

August 13, 2018
Author(s)
Zeeshan Ahmed, Lonnie T. Cumberland, Ronald E. Tosh, Nikolai N. Klimov, Ileana M. Pazos, Ryan P. Fitzgerald
In recent years silicon photonic platforms have undergone rapid maturation enabling not only optical communication but complex scientific experiments ranging from sensors applications to fundamental physics inquiries. There is con-siderable interest in

NIST Customer Demographics: Calibrations

August 13, 2018
Author(s)
Nicole K. Gingrich, Isaac S. Patterson
This economic analysis brief summarizes the efforts and results of the data collection and analysis of NIST's calibration customer information. Summary statistics for calibration customers are provided for fiscal years 2010 through 2015. Included in the

NIST Customer Demographics: Patent Licenses

August 13, 2018
Author(s)
Nicole K. Gingrich, Isaac S. Patterson
This economic analysis brief summarizes the efforts and results of the data collection and analysis of NIST's patent licensee information. Summary statistics for licensees are provided for fiscal years 2006 through 2015. Included in the analysis are

A Charge Integrator Amplifier and Trap Detector for pico-Joule Laser Pulse Energy Measurement

August 10, 2018
Author(s)
Malcolm G. White, David J. Livigni, Rodney W. Leonhardt, Geiland Porrovecchio, Marek Smid
We report the characterisation and calibration of a charge integrator amplifier, developed for pico-joule laser pulse energy measurement at repetition rates up to 1 kHz. The amplifier is designed to operate in conjunction with an input charge source, such
Displaying 11401 - 11425 of 73893
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