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Displaying 18176 - 18200 of 74061

Statistical Models and Computation to Evaluate Measurement Uncertainty

July 11, 2014
Author(s)
Antonio M. Possolo
In the course of the twenty years since the publication of the GUM, the recognition has been steadily growing, of the value that statistical models and statistical computing bring to the evaluation of measurement uncertainty, and of how they enable its

Direct Measurement of Hydrogen Dislocation Pipe Diffusion in Deformed Polycrystalline Pd using Quasielastic Neutron Scattering

July 10, 2014
Author(s)
Brent J. Heuser, Dallas R. Trinkle, Niina Jalarvo, Joseph Serio, Eugene Mamontov, Madhu Sudan Tyagi
The temperature-dependent diffusivity D(T) of hydorgen solute atoms trapped at dislocations - dislocation pipe diffusion of hydorgen - in deformed polycrystalline PdH x(x'0 -3[H]/[Pd] has been quantified with quasi-elastic neutron scattering (QENS) between

Experimental measurements and noise analysis of a cryogenic radiometer

July 10, 2014
Author(s)
Solomon I. Woods, Timothy M. Jung, Adriaan C. Carter, Raju V. Datla , Stephen M. Carr
A cryogenic radiometer device, intended for use as part of an electrical-substitution radiometer, was measured at low temperature. The device consists of a receiver cavity mechanically and thermally connected to a temperature-controlled stage through a

Non-local propagation of correlations in long-range interacting quantum systems

July 10, 2014
Author(s)
Phil Richerme, Zhexuan Gong, Aaron Lee, Crystal Senko, Jacob Smith, Michael S. Foss-Feig, Spyridon Michalakis, Alexey Gorshkov, Christopher Monroe
The maximum speed with which information can propagate in a quantum many-body system directly affects how quickly disparate parts of the system can become correlated and how difficult the system will be to describe numerically. For systems with only short

Release of NIST Interagency Report 7946, CVSS Implementation Guidance

July 10, 2014
Author(s)
Harold Booth, Joshua M. Franklin, Larry Feldman, Greg Witte
The Common Vulnerability Scoring System (CVSS) is an open standard designed to convey severity and risk of information system vulnerabilities. CVSS was commissioned by the National Infrastructure Advisory Council (NIAC) in support of the global

Spectral Emissivity Measurements

July 10, 2014
Author(s)
Hiromichi Watanabe, Juntaro Ishii, Hidenobu Wakabayashi, Tomoyuki Kumano, Leonard Hanssen
Chapter 9 describes the wide variety of experimental instrumentation and methods used for spectral emissivity measurements at both ambient and elevated temperatures, along with specific examples of materials studied. There are a number of measurement

Trapping atoms using nanoscale quantum vacuum forces

July 10, 2014
Author(s)
Jacob M. Taylor, Darrick E. Chang, Kanupriya Sinha, H J. Kimble
Quantum vacuum forces dictate the interaction between individual atoms and dielectric surfaces at nanoscale distances. For example, their large strengths typically overwhelm externally applied forces, which makes it challenging to controllably interface

A Stiffness Model for Control and Analysis of a MEMS Hexapod Nanopositioner

July 9, 2014
Author(s)
Hongliang Shi, Hai-Jun Su, Nicholas Dagalakis
This paper presents a stiffness based kinematic model for analysis and control of a MEMS flexure-based hexapod nanopositioner that was previously built by the National Institute of Standards and Technology (NIST). This nanopositioner is capable of

Structures and thermoelectric properties of double-filled (CaxCe1-x)Fe4Sb12 skutterudites

July 9, 2014
Author(s)
Yonggao Y. Yan, Winnie Wong-Ng, James A. Kaduk, Matthew Suchomel, Xiang Sun, Gangjian Tan, Xinfeng Tang, Lan (. Li, Igor Levin
The structures and thermoelectric properties of double-filled (CaxCe1-x)Fe4Sb12 series (x=0, 0.25, 0.5, 0.75, and 1) have been investigated using the combination of experimental and computational approaches. Structural analysis shows that single phases of

Sustainable Manufacturing Program Workshop Report

July 9, 2014
Author(s)
Sudarsan Rachuri, Katherine C. Morris, Utpal Roy, David Dornfeld, Soundar Kumara
The National Institute of Standards and Technology (NIST)’s Sustainable Manufacturing Program held a workshop on November 13-14, 2012, in Gaithersburg, MD. Dr. Shyam Sunder, Director of NIST’s Engineering Laboratory, initiated the workshop proceedings. In

Chapter 10: Color and Appearance

July 8, 2014
Author(s)
Maria E. Nadal, Clarence J. Zarobila
This chapter will cover the topic of color and appearance measurements. These measurements essentially constitute a specific example of the measurements described in previous chapters; except that they are performed in the specific wavelength range sensed

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
Displaying 18176 - 18200 of 74061