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Displaying 11976 - 12000 of 73927

Assessment of Carrier Lifetimes and Surface Recombination Velocity through Spectral Measurements

May 11, 2018

Author(s)

John F. Roller, Behrang H. Hamadani

Charge carrier lifetimes and surface recombination velocities were measured on photovoltaic- grade silicon wafers using a spectral-dependent method. Narrow bandwidth light emitting diodes (LEDs) were used to generate excess charge carriers inside the

Opportunities and Challenges in Implementation of Multiparameter Single Cell Analysis Platforms for Clinical Translation

May 11, 2018

Author(s)

susan M. Keating, D. Lansing Taylor, Anne L. Plant, E. David Litwack, Peter Kuhn, Emily J. Greenspan, Christopher M. Hartshorn, Caroline C. Sigman, Gary J. Kelloff, Gregory Friberg, Jerry S. Lee, Keisuke Kuida

The high-content interrogation of single cells with platforms optimized for the multiparameter characterization of cells in liquid and solid biopsy samples can enable characterization of heterogeneous populations of cells ex vivo. Doing so will advance the

pyPRISM Documentation

May 11, 2018

Author(s)

Tyler B. Martin, Thomas E. Gartner, Ronald L. Jones, Chad R. Snyder, Arthi Jayaraman

pyPRISM Tutorial

May 11, 2018

Author(s)

Tyler B. Martin, Thomas E. Gartner, Ronald L. Jones, Chad R. Snyder, Arthi Jayaraman

Resolving the neutron lifetime puzzle

May 11, 2018

Author(s)

Hans P. Mumm

A measurement of trapped neutrons dramatically improves control of systematic uncertainties

Carrier Density Control of Magnetism and Berry Phases in Doped EuTiO 3

May 10, 2018

Author(s)

Kaveh Ahadi, Zhigang Gui, Zach Porter, Jeffrey W. Lynn, Zhijun Xu, Stephen D. Wilson, Anderson Janotti, Susanne Stemmer

In materials with broken time-reversal symmetry, the Berry curvature acts as a reciprocal space magnetic field on the conduction electrons and is significant contribution to the magnetotransport properties, including to the intrinsic anomalous Hall effect

Design and Construction of Long-Span Composite Beam Specimens for Large Structural-Fire Tests

May 10, 2018

Author(s)

Selvarajah Ramesh, Lisa Choe, Matthew Hoehler, William L. Grosshandler, John L. Gross

A series of experiments is being conducted on five 12.8 m long composite floor beams at the newly-commissioned National Fire Research Laboratory at the National Institute of Standards and Technology. The test beams were designed according to current U.S

Energy Renormalization Method for the Coarse-Graining of Polymer Viscoelasticity

May 10, 2018

Author(s)

Jake Song, David D. Hsu, Kenneth R. Shull, Frederick R. Phelan Jr., Jack F. Douglas, Wenjie Xia, Sinan Keten

Developing time and temperature transferable coarse-grained (CG) models is essential for the computational prediction and design of polymeric glass-forming materials, but this goal has remained elusive. The dynamics of CG models are often greatly altered

Quick Start Guide for Populating Mobile Test Devices

May 10, 2018

Author(s)

Richard Ayers, Benjamin R. Livelsberger, Barbara Guttman

This guide provides procedures for documenting and populating various data elements typically found within the contents of a mobile device, e.g., mobile phone, tablet, etc. The guide discusses techniques and considerations for preparing the internal memory

The Influence of Annealing Temperature and Time on the Formation of delta-Phase in Additively-Manufactured Inconel 625

May 10, 2018

Author(s)

Mark R. Stoudt, Eric Lass, Daniel S. Ng, Maureen E. Williams, Fan Zhang, Carelyn E. Campbell, Greta Lindwall, Lyle E. Levine

This research evaluated the kinetics of delta-phase growth in laser powder bed additively- manufactured (AM) Inconel 625 during post-build stress-relief heat treatments. The temperatures ranged between 650 °C to 1050 °C, and the times from 0.25 h to 168 h

Time-Resolved Vibrational Spectroscopy

May 10, 2018

Author(s)

Huib Bakker, Stephen Meech, Edwin J. Heilweil

'Software Science' revisited: rationalizing Halstead's system using dimensionless units

May 9, 2018

Author(s)

David W. Flater

The set of software metrics introduced by Maurice H. Halstead in the 1970's has seen much scrutiny and not infrequent criticism. This article takes a fresh look at these metrics using quantity calculus (the algebra of units) and a new approach to

Evaluating error with atomistic simulations: the effect of potential and calculation methodology on the modeling of lattice and elastic constants.

May 9, 2018

Author(s)

Lucas M. Hale, Zachary T. Trautt, Chandler A. Becker

Atomistic simulations using classical interatomic potentials are powerful investigative tools linking atomic structures to dynamic properties and behaviors. It is well known that different interatomic potentials produce different results, thus making it

Fast Rotational Diffusion of Water Molecules in a 2D Hydrogen Bond Network at Cryogenic Temperatures

May 9, 2018

Author(s)

Timothy R Prisk, C. Hoffmann, A. I. Kolesnikov, E. Mamontov, A. A. Podlesnyak, X. Wang, P. R. C. Kent, L. M. Anovitz

Individual water molecules or small clusters of water molecules contained within microporous minerals present an extreme case of confinement where the local structure of hydrogen bond networks are dramatically altered from bulk water phases. In the zinc

Flowing water optical power meter design, operation, and uncertainty for multi-kilowatt laser power measurements

May 9, 2018

Author(s)

Paul A. Williams, Joshua A. Hadler, Christopher L. Cromer, Xiaoyu X. Li, John H. Lehman

A flowing water optical power meter for measuring multi-kilowatt laser emission has been built and operated. The design and operational details of this primary standard are described, and a full uncertainty analysis is provided covering the measurement

Improved threat identification using tonemapping of high dynamic range x-ray images

May 9, 2018

Author(s)

Jack L. Glover, Nicholas G. Paulter Jr., Lawrence T. Hudson

Short-time dental resin biostability and kinetics of enzymatic degradation

May 9, 2018

Author(s)

Xiaohong Wang, Sheng Song, Lei Chen, Christopher M. Stafford, Jirun Sun

Resin biostability is an important concern regarding the durability of methacrylate-based dental resin restorations. Current resin biostability evaluation methods take considerable time, from weeks to months, and provide no short-time kinetics of resin

Superconducting optoelectronic networks IV: transmitter circuits

May 9, 2018

Author(s)

Jeffrey M. Shainline, Adam N. McCaughan, Sonia M. Buckley, Richard P. Mirin, Sae Woo Nam, Amir Jafari-Salim

A superconducting optoelectronic neuron will produce a small current pulse upon reaching threshold. We present an amplifier chain which converts this small current pulse to a voltage pulse sufficient to produce light from a semiconductor diode. This light

A Standards-Based Approach for Linking As-Planned to As-Fabricated Product Data

May 8, 2018

Author(s)

Moneer M. Helu, Thomas D. Hedberg

The digital thread links disparate systems across the product lifecycle to support data curation and information cultivation and enable data-driven applications, e.g., digital twin. Realizing the digital thread requires the integration of semantically-rich

Beta-Bond Scission and the Yields of H and CH3 in the Decomposition of i-Butyl Radicals

May 8, 2018

Author(s)

Laura A. Mertens, Jeffrey A. Manion

The relative rates of C-C and C-H β-scission reactions of i-butyl radicals were investigated with shock tube experiments at temperatures of (950 to 1250) K and pressures of (200 to 400) kPa. We produce i-butyl radicals from the decomposition of dilute

Computational screening of high-performance optoelectronic materials using OptB88vdW and TB-mBJ formalisms

May 8, 2018

Author(s)

Kamal Choudhary, Qin Zhang, Sugata Chowdhury, Nhan V. Nguyen, Zachary T. Trautt, Marcus W. Newrock, Faical Y. Congo, Andrew C. Reid, Francesca M. Tavazza

We perform high-throughput density functional theory (DFT) calculations for optoelectronic properties (electronic bandgap and frequency dependent dielectric function) using the OptB88vdW functional (OPT) and the Tran-Blaha modified Becke Johnson potential

Noise Reduction in Optically Controlled Quantum Memory

May 7, 2018

Author(s)

Lijun Ma, Oliver T. Slattery, Xiao Tang

Quantum memory is an essential device for quantum communications systems and quantum computers. An important category of quantum memory, called Optically controlled quantum memory, uses a strong classical beam to control the storage and re-emission of a

Optical Measurements of Dynamic Absorptance during High-power Laser Spot Welding

May 7, 2018

Author(s)

Brian Simonds, Jeffrey W. Sowards, Joshua A. Hadler, Boris Wilthan, Erik A. Pfeif, Jack Tanner, Chandler Harris, Paul A. Williams, John Lehman

We present precision measurements of the time-dependent absorptance during a 10 ms fiber-laser spot weld on 316L stainless steel. From these, the precise time and energy at which a keyhole is formed can be determined.

Qualitative characterization of three combustion-related standard reference materials for polycyclic aromatic sulfur heterocycles and their alkyl-substituted derivatives via gas chromatography/mass spectrometry

May 7, 2018

Author(s)

Walter Wilson, Hugh Hayes, Andres Campiglia, Stephen Wise

This study represents the most comprehensive qualitative characterization of three combustion- related standard reference materials (SRMs) for polycyclic aromatic sulfur heterocycles (PASHs) and some alkyl-substituted (alkyl-) derivatives to date: SRM

Sequence-based U.S. population data for the SE33 locus

May 7, 2018

Author(s)

Lisa Borsuk, Katherine Gettings, Carolyn R. Steffen, Kevin M. Kiesler, Peter Vallone

A set of 1036 U.S. Population Samples were sequenced using the Illumina ForenSeq DNA Signature Prep Kit. This sample set has been highly characterized using a variety of marker systems for human identification. The FASTQ files obtained from a ForenSeq DNA

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