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Displaying 2276 - 2300 of 5221

Concentration Measurement of Length-Fractionated Colloidal Single-Wall Carbon Nanotubes

September 20, 2012

Author(s)

Constantine Y. Khripin, Xiaomin X. Tu, John Howarter, Jeffrey A. Fagan, Ming Zheng

Determination of the colloid concentration for a given single-wall carbon nanotube (SWCNT) dispersion is a basic requirement for many studies. The commonly used optical absorption based concentration measurement is complicated by the spectral change due to

Program Handbook for Engine Fuel, Petroleum and Lubricant Laboratories

September 20, 2012

Author(s)

Kenneth S. Butcher

This handbook provides guidance to extablish a management system of State Fuel Quality Laboratories (FQL) using the International Organization for Standardization (ISO) International Electrotechnical Commission (IEC) ISO/IEC 17025:2005, "General

Factory Equipment Network Testing Framework: Concept, Requirements, and Architecture

September 17, 2012

Author(s)

James D. Gilsinn, Kang B. Lee, John L. Michaloski, Frederick M. Proctor, Yuyin Song

This document describes the purpose, concept, requirements, and architecture for the Factory Equipment Network Testing (FENT) Framework and the software to test equipment on real-time factory networks. Other documents contain more detailed information

Factory Equipment Network Testing Framework: Universal Client Application, Application Programming Interface

September 17, 2012

Author(s)

James D. Gilsinn, Kang B. Lee, John L. Michaloski, Frederick M. Proctor, Yuyin Song

This document describes the application programming interface (API) used by the Factory Equipment Network Testing (FENT) Framework to communicate between the main Universal Client Application (UCA) and the Personality Module (PM). This API abstracts a

Characterization of a High-Speed (10 MHz) Quadrant Avalanche Photodiode for Measuring Cantilever Displacement

September 16, 2012

Author(s)

Brian G. Burke, David A. LaVan

We have measured the characteristics of a high-speed (10 MHz) quadrant avalanche photodiode (APD) in order to detect high frequency resonant oscillations and tip displacements of a cantilever. Currently, no high-speed quadrant detectors with a response

Spin Dynamics in the Time and Frequency Domain

September 15, 2012

Author(s)

Thomas J. Silva

The current status of experimental approaches to analyze the spin wave dynamics in ferromagnetic nanoscale structures is reviewed. Recent developments in frequency- and field swept spectroscopy to determine the resonant response of nanoscale ferromagnets

BioCTS 2012: Advanced Conformance Test Architectures and Test Suites for Biometric Data Interchange Formats and Biometric Information Records

September 14, 2012

Author(s)

Fernando L. Podio, Dylan J. Yaga, Christofer J. McGinnis

The Computer Security Division of NIST/ITL supports the development of biometric conformance testing methodology standards and other conformity assessment efforts through active technical participation in the development of these standards and the

Absolute interferometric tests of spherical surfaces based on rotational and translational shears

September 13, 2012

Author(s)

Johannes A. Soons, Ulf Griesmann

Traceability of interferometric form measurements requires characterization of the reference wavefront. We investigate absolute tests for spherical surfaces where the form errors of both reference and test surface are estimated by minimizing the difference

Density and Speed of Sound Measurements of Four Bio-derived Fuels

September 13, 2012

Author(s)

Stephanie L. Outcalt, Tara J. Fortin

Compressed-liquid densities and ambient pressure densities and speeds of sound of four biomass-derived fuels have been measured. The compressed-liquid measurements were made from 270 K to 470 K, and 0.5 MPa to 50 MPa. The ambient pressure measurements were

FATIGUE CRACK GROWTH OF TWO X52 PIPELINE STEELS IN A PRESSURIZED HYDROGEN ENVIRONMENT

September 9, 2012

Author(s)

Andrew J. Slifka, Elizabeth S. Drexler, Neha N. Rustagi, Damian S. Lauria, Joseph D. McColskey, Robert L. Amaro

Fatigue crack growth tests were conducted on two API 5L X52 pipeline steel alloys. One alloy was from a new linepipe that was installed for hydrogen service in 2011. The other alloy was from a vintage pipe that first saw natural gas service in 1964

Measurement of the diameter variation and refractive index inhomogeneity of a fused silica sphere using four-surface phase-shifting interferometry

September 9, 2012

Author(s)

Chu-Shik Kang, Ulf Griesmann, Johannes A. Soons

The diameter variation and refractive index inhomogeneity of a fused silica sphere were measured with a frequency-shifting Fizeau interferometer in a four-surface configuration. The phase-shifting algorithms to analyze the interference signals for each

Measurement Techniques for Evaluating Current Range Extenders from 1 Amp to 3000 Amps

September 1, 2012

Author(s)

Marlin E. Kraft

When measuring standard resistors at different ratios with a Direct Current Comparator (DCC) incorporating Current Range Extenders (CREs) how do you know the value measured is correct and how can you evaluate the measurement uncertainty? This paper will

Error Modeling of Seebeck Coefficient Measurements Using Finite Element Analysis

August 28, 2012

Author(s)

Joshua B. Martin

Using finite element analysis, we have developed a metrology simulation to model errors in the measurement of the Seebeck coefficient. This physical parameter is the constant of proportionality relating the electric potential that is generated across a

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