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NIST Authors in Bold

Displaying 19826 - 19850 of 74186

Colored Noise and Regularization Parameter Selection for Waveform Metrology

July 8, 2014
Author(s)
Andrew M. Dienstfrey, Paul D. Hale
We study six regularization parameter selection algorithms applied to deconvolution problems relevant for characterization of high-speed communication measurement systems. In particular we investigate the performance of these selectors in the presence of

Comparing Matched Polymer:Fullerene Solar Cells Made by Solution-Sequential Processing and Traditional Blend Casting: Nanoscale Structure and Device Performance

July 8, 2014
Author(s)
Andrew Herzing, Steven A. Hawks, Jordan C. Aguirre, Laura T. Schelhas, Robert Thompson, Rachel Huber, Amy Ferreira, Guangye Zhang, Robert A. Street, Sarah Tolbert, Benjamin Schwartz
Efficient bulk heterojunction (BHJ) solar cells based on polymer:fullerene photoactive layers can be created either by traditional blend casting (BC), where the components are mixed together in solution before being cast, or by solution-sequential

1588 Power Profile Test Plan

July 7, 2014
Author(s)
Carol Perkins, Jeff Laird, Ryan McEachern, Bob Noseworthy, Julien M. Amelot, Ya-Shian Li-Baboud, Kevin G. Brady
The National Institute of Standards and Technology (NIST) is an agency of the U.S. Department of Commerce, facilitating the industry adoption of IEEE Standard C37.238 for the use of IEEE 1588 in Power Systems Applications in support of the Smart Grid. The

Cathodoluminescence Quantum Efficiency of Quantum Dot Thin Films

July 7, 2014
Author(s)
Heayoung Yoon, Christopher C. Bohn, Youngmin Lee, Seung H. Ko, Jonathan S. Steckel, Seth Coe-Sullivan, Nikolai B. Zhitenev
A thin film of quantum dots (QD) was used to visualize the local photo-response of polycrystalline CdTe solar cells by down-converting an electron beam of high energy to photons of visible light. The efficient photon generation in the QD film is compared

Sealed Gravitational Capillary Viscometers for Volatile Liquids

July 7, 2014
Author(s)
Arno R. Laesecke
The evolution of sealed gravitational capillary viscometers for measurements of volatile liquids is reviewed. Two corrections need to be applied to measurements with them: (i) the vapor buoyancy correction and, if coiled capillaries are used, (ii) the

Solid-State 29 Si NMR and Neutron-Diffraction Studies of Sr 0.07 K 0.3 SiO 2.85 Oxide Ion Conductors

July 7, 2014
Author(s)
Jungu Xu, Xiaoming Wang, Hui Fu, Craig Brown, Xiping Jing, Fuhui Liao, Fengqi Lu, Xiaohui Li, Xiaojun Kuang, Mingmei Wu
The new oxide ion conductors Sr 1-xK xSiO 3-05x, recently reported as promising candidate electrolytes for solid oxide fuel cells, were characterized using solid-state 29Si nuclear magnetic resonance (NMR)spectroscopy, neutron powder diffraction (NPD) and

Spectral Fluorescence Measurements

July 7, 2014
Author(s)
Paul C. DeRose, Joanne C. Zwinkels, James Leland
This chapter covers the topic of spectral fluorescence measurements. These fluorescence measurements offer significant advantages in terms of sensitivity and selectivity, finding wide use in a range of applications in analytical and color technologies. The

Standards Related to Prognostics and Health Management (PHM) for Manufacturing

July 7, 2014
Author(s)
Gregory W. Vogl, Brian A. Weiss, M A. Donmez
Prognostics and health management (PHM) systems are utilized to reduce burdensome maintenance tasks of monitored products or processes through diagnostics and prognostics, which provide actionable information that support decision-making for improved

The Suppression of Curie Temperature by Sr Doping in Diluted Ferromagnetic Semiconductor (La 1-x Sr x )(Zn 1-y MnYdy^)AsO

July 7, 2014
Author(s)
Cui Ding, Xin Gong, Huiyuan Man, Guoxiang Zhi, Shengli Guo, Yang Zhao, Hangdong Wang, Bin Chen, F.L. Ning
(La 1-xSr x)(Zn 1-yMndy^)AsO is a two dimensional diluted ferromagnetic semiconductor that has advantage of decoupled charge and spin doping. The substitution of Sr 2+ for La 3+ and Mn 2+ for Zn 2+ into parent semiconductor LaZnAsO introduces hole carriers

Viscosity Measurements of DNA Solutions with and without Condensing Agents

July 7, 2014
Author(s)
Arno D. Laesecke, Jessica L. Burger
Aqueous DNA solutions at three concentrations were studied as model sputum by viscosity measurements at ambient pressure. Initial measurements at 25 °C, 37.78 °C, and 50 °C indicated a viscosity increase toward 50 °C. This phenomenon was studied by

Evaluating and Verifying the Performance of the Ft. Huachuca Compact Range

July 6, 2014
Author(s)
Michael H. Francis, Ronald C. Wittmann
The National Institute of Standards and Technology (NIST) presents a plan for evaluating and verifying the performance of the refurbished Ft. Huachuca Antenna Test Facility outdoor compact range. This plan was drawn up based upon information supplied to

Evaluating the Performance of the Ft. Huachuca Compact Range

July 6, 2014
Author(s)
Michael H. Francis, Ronald C. Wittmann
The National Institute of Standards and Technology (NIST) presents a plan for evaluating and verifying the performance of the refurbished Ft. Huachuca Antenna Test Facility outdoor compact range. This plan was drawn up based upon information supplied to

Low Temperature Plasma for Bevel Crater Depth Profiling of Crosslinking Organic Multilayers: Comparison with C60 and Argon Gas Cluster Sources

July 6, 2014
Author(s)
Shinichiro Muramoto, Derk Rading, Brian G. Bush, John G. Gillen, David G. Castner
A model delta layer system made of thin films of an organometallic chelate and an aromatic molecule (aluminum hydroxyquinolinate and bathocuproine), both that crosslink under traditional ion beam irradiation, was used to evaluate the effectiveness of using

On Run Diversity in "Evaluation as a Service"

July 6, 2014
Author(s)
Ellen M. Voorhees
"Evaluation as a service" (EaaS) is a new methodology that enables community-wide evaluations and the construction of test collections on documents that cannot be distributed. The basic idea is that evaluation organizers provide a service API through which

The Effect of Sampling Strategy on Inferred Measures

July 6, 2014
Author(s)
Ellen M. Voorhees
Using the inferred measures framework is a popular choice for constructing test collections when the target document set is too large for pooling to be a viable option. Within the framework, different amounts of assessing effort is placed on different

Extreme ultraviolet spectra and analysis of ?n=0 transitions in highly charged barium

July 4, 2014
Author(s)
Joseph Reader, John D. Gillaspy, Dmitry D. Osin, Yuri Ralchenko
Extreme ultraviolet spectra of highly charged barium atoms were produced with an electron beam ion trap (EBIT) and recorded with a flat-field grazing-incidence spectrometer. The spectra were measured in the wavelength range 4 nm to 24 nm with the beam

Approximate Matching: Definition and Terminology

July 2, 2014
Author(s)
Frank Breitinger, Barbara Guttman, Michael McCarrin, Vassil Roussev, Douglas R. White
This document provides a definition of and terminology for approximate matching. Approximate matching is a promising technology designed to identify similarities between two digital artifacts. It is used to find objects that resemble each other or to find

Imaging the p-n junction in a gallium nitride nanowire with a scanning microwave microscope

July 2, 2014
Author(s)
Atif A. Imtiaz, Thomas M. Wallis, Joel C. Weber, Kevin J. Coakley, Matthew D. Brubaker, Paul T. Blanchard, Kristine A. Bertness, Norman A. Sanford
We used a broadband, atomic-force-microscope-based, scanning microwave microscope (AFM-SMM) to probe the axial dependence of the depletion in a GaN nanowire (NW) p-n junction structure. The NWs were c-axis oriented and grown by molecular beam epitaxy. The
Displaying 19826 - 19850 of 74186
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