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Displaying 30701 - 30725 of 73802

NCSLI: Approved for the 2008 Combined Federal Campaign (CFC)!

July 15, 2008
Author(s)
Georgia L. Harris
Federal employees can now contribute their tax-deductible contributions through the Combined Federal Campaign (CFC) and support NCSL International efforts at the same time. NCSLI's code is 26683 for 2008. We will be listed in the National/International

Conformance Testing and Interoperability: A Case Study in Healthcare Data Exchange

July 14, 2008
Author(s)
Robert D. Snelick, Leonard E. Gebase, Mark Skall
Correct data exchange is critical for ensuring reliable healthcare systems. Standards based systems are the foundation for achieving this goal. However, standards alone are not enough to ensure this promise; conformance and interoperability testing are

Generating Network Models Using the S-Metric

July 14, 2008
Author(s)
Isabel M. Beichl, Brian D. Cloteaux
The ability to create random models of real networks is useful for understanding the interactions of the networks. Several researchers have proposed modeling of complex networks using the degree distribution, the most popular being a power-law distribution

Joe D. Simmons Memorial Scholarship

July 14, 2008
Author(s)
Norman B. Belecki, Dilip Shah, Diana Poulton, Mark Lapinskis, J. M. Suraci, Patricia Simmons, J H. Simmons, Georgia L. Harris
The Joe D. Simmons Memorial Scholarship fosters the furtherance of metrology through education by striving to: support the academic pursuit of a metrology career by worthy students; promote and improve measurement science education and educational

Nature of Transition Layers at the SiO 2 /SiC Interface

July 14, 2008
Author(s)
T Zheleva, Aivars Lelis, G Duscher, F Liu, Igor Levin, M Das
Electrical performance of SiC-based microelectronic devices is strongly affected by the densities of interfacial traps introduced by the chemical and structural changes at the SiO2/SiC interfaces during processing. We analyzed the structure and chemistry

PRACTICAL METHOD FOR MEASUREMENT OF AC-DRIVEN HIGH-POWER LEDS

July 14, 2008
Author(s)
Yuqin Zong, Yoshihiro Ohno, Pei-ting Chou
Alternating-current (AC) driven high-power LEDs are available and used in SSL products. AC LEDs operate directly from a mains supply and thus have advantages in simplifying product design, increasing product reliability, and extending product lifetime

Web Thermo Tables an On-Line Version of the TRC Thermodynamic Tables

July 14, 2008
Author(s)
Andrei F. Kazakov, Chris D. Muzny, Robert D. Chirico, Vladimir Diky, Michael D. Frenkel
It has long been understood that availability of thermophysical and thermochemical property data is vital to scientific research and industrial design. For over 65 years, the Thermodynamics Research Center (TRC) has been publishing tables of critically

Applications of highly coherent femtosecond fiber lasers

July 13, 2008
Author(s)
Nathan R. Newbury, Ian R. Coddington, William C. Swann
Coherent, broadband fiber lasers produce pulse trains with <1 femtosecond relative timing uncertainty and <1 mHz relative frequency uncertainty. These sources can advance many applications including optical frequency metrology, ranging LIDAR, and broadband

Complex micropatterning of periodic structures on elastomeric surfaces

July 10, 2008
Author(s)
Arnaud Chiche, Christopher Stafford, J Cabral
We report a simple methodology to fabricate complex sub-micron periodic structures in poly(dimethylsiloxane) over large surface areas (several cm2). Single-frequency, uni- and multi-axial sinusoidal surface modulations, with tunable amplitude and

Inverted spectra of single-wall carbon nanotube films

July 10, 2008
Author(s)
John H. Lehman, Katie Hurst, Lara Roberson, K. Nield, J. D. Hamlin
We present absolute measurements of reflectance and absorbance for a purified single wall carbon nanotube (SWCNT) film. The absorbance spectrum of a SWCNT-laminated pyroelectric detector for wavelengths 0.6 - 2 υm is inverted when compared to absorbance

Fiducial approach for assessing agreement between two instruments

July 9, 2008
Author(s)
Chih-Ming Wang, Hariharan K. Iyer
This paper presents an approach for making inferences about the intercept and the slope of a linear regression model with both variables subject to measurement errors. The approach is based on the principle of fiducial inference. A procedure is presented

REPRESENTING LAYOUT INFORMATION IN THE CMSD SPECIFICATION

July 9, 2008
Author(s)
Frank H. Riddick, Yung-Tsun T. Lee
Developing mechanisms for the efficient exchange of information between simulations and other manufacturing tools is a critical problem today. For many areas of manufacturing, neither representations for the information nor mechanisms for exchanging the

Unconventional spin glass behavior in the pyrochlore Mn2Sb2O7

July 9, 2008
Author(s)
H. D. Zhou, C. R. Wiebe, A. Harter, Naresh S. Dalal, Jason Gardner
The new pyrochlore Mn2Sb2O7 has been synthesized via a low-temperature method to retain cubic Fd2m symmetry. The resulting material has an unconventional spin glass state at TSG∼41 K, in the absence of detectable site disorder or a structural phase

Grain Size Distribution in Two Dimensions in the Long Time Limit

July 8, 2008
Author(s)
Geoffrey B. McFadden, C.S. Pande, K.P. Cooper
It is shown that the inclusion of a "noise" term in the growth rate of individual grains leads to a stochastic model that provides a more realistic description of grain growth phenomenon. The resulting Fokker-Planck equation for the grain size distribution

Statistical Learning Methods for Neutron Transmission Tomography of Fuel Cells

July 8, 2008
Author(s)
Kevin Coakley, Dominic F. Vecchia, Daniel S. Hussey
In a fuel cell, water is formed as a by-product of the reaction between hydrogen and oxygen. As a neutron beam passes through a fuel cell, it can undergo s-wave scattering. For the dry and wet states of a fuel cell, there are spatially varying neutron

TRc Thermodynamic Tables, Non-Hydrocarbon Supplement NH-99

July 8, 2008
Author(s)
Michael D. Frenkel
1. Table 9-db - Pages db-92.0 through db-92.9: New table for fluorine containing the density for the real fluid at selected temperatures and pressures. 2. Table 23-2-1-(1.10214)-db - Pages db-5098.0 and db-5098.1: New table for 3-methyl-3-pentanol

NIST Goniospectrometer for Surface Color Measurements

July 7, 2008
Author(s)
Maria E. Nadal, Gael Obein
The goniospectrometer at the National Institute of Standards and Technology (NIST) can measure the spectral reflectance of colored samples over a wide range of illumination and viewing angles. This capability is important for the colorimetric

Observations of Pt/Ne hollow cathode lamps similar to those used on the Cosmic Origins Spectrograph

July 7, 2008
Author(s)
Gillian Nave, Craig J. Sansonetti, S. V. Penton, Nathaniel Cunningham, Matthew Beasley, Steve Osterman, F Kerber, Charles D. Keyes, Michael R. Rosa
We report accelerated aging tests on three Pt/Ne lamps from the same manufacturing run as lamps installed on the Cosmic Origins Spectrograph (COS). One lamp was aged in air at the National Institute of Standards and Technology (NIST) at a current of 10 mA

Spatial-Temporal Correlations at the Onset of Flow in Concentrated Suspensions

July 7, 2008
Author(s)
Nicos Martys, Didier Lootens, William L. George, Steven G. Satterfield, Pascal Hebraud
Spatial-temporal correlations in the startup-up flow of colloidal suspensions composed of attractive spherical particles under static and shear conditions are studied by computer simulation. The evolution of particle organization with time is followed as

Stationary and non-stationary deformations in three-flat tests

July 7, 2008
Author(s)
Ulf Griesmann, Quandou (. Wang, Nicolas Laurenchet, Johannes A. Soons
Calibration procedures for optical reference flats of phase-shifting interferometers (three-flat tests) are critically important if flatness measurements with low uncertainty are desired. In these tests, all combinations of three flats with unknown
Displaying 30701 - 30725 of 73802
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