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Search Publications

NIST Authors in Bold

Displaying 29351 - 29375 of 73697

Accoustic Studies of Composite-Material Interfaces

October 16, 2008
Author(s)
H M. Ledbetter
We review six recent acoustic studies of composite-material interfaces. Measured physical properties are either elastic constants (sound velocities resonance frequencies) or internal frictions. The materials considered include (1) glass fiber/epoxy, (2)

Accuracy Issues in Chemical and Dimensional Metrology in the SEM and TEM

October 16, 2008
Author(s)
J H. Scott
In this work computer simulations are used to understand systematic errors and accuracy concerns in both dimensional and chemical metrology in the scanning electron microscope (SEM) and transmission electron microscope (TEM).Multislice high-resolution TEM

Accurate Determination of High Energy Gamma-Ray Standards

October 16, 2008
Author(s)
Ernest G. Kessler Jr., Maynard S. Dewey, R Deslattes, Albert Henins, H G. Borner, M Jentschel, H Lehmann
The extension of accurate crystal diffraction spectroscopy to the 2 to 6 MeV region is described. Gamma-ray standards with a relative uncertainty of (2 to 5)x10 -7 are obtained by measuring the small diffraction angles (a few tenths of a degree) through

AFM Observations of Slip Band Development in AI Single Crystals

October 16, 2008
Author(s)
D E. Kramer, M Savage, Lyle E. Levine
In situ atomic force microscopy (AFM) is used to observe the structure and evolution of slip bands on the surface of plastically deformed aluminum single crystals. Both the structure and evolution of the slip bands are observed to be a function of the

Alloy Selection

October 16, 2008
Author(s)
C A. Handwerker, Ursula R. Kattner, Kil-Won Moon, J Bath, E -. Bradley, P Snugovsky
In this chapter, the key results and analyses leading to the choice of tin-silver-copper alloys by NEMI as the new national standard Pb-free solder system are discussed in detail. These include data on phase transformations in solders (including melting

Amphiphilic Block Copolymer Nanotubes and Vesicles Stabilized byPhotopolymerization

October 16, 2008
Author(s)
Ana Jofre, John B. Hutchison, Laurie E. Locascio, Kristian Helmerson
Photopolymerization is implemented to crosslink and stabilize vesicles and nanotubes composed of amphiphilic block copolymer chains. Stabilized membranes of nanotubes and vesicles were formed by the directed self-assembly of poly(ethylene oxide)-block

An Approach for Assessing Total Cellular DNA Damage

October 16, 2008
Author(s)
Marc Roy
The capability to relate phenotypic effects with damage associated with either of the two genomes is especially useful under a number of circumstances. Potential hazardous exposures (e.g. smoking, pesticides, uv-light) can be evaluated for genotoxicity and

An Element of Physical Reality on the Choice of Measurement Basis

October 16, 2008
Author(s)
David Song
It is shown that the choice of measurement basis where entangled systems are measured in cannot be local elements of reality. Two distant parties share maximally entangled states and chosen bases between Z and X with P=1/2 are used to perform measurements

An Estimate of Effect Size Based on the Mann-Whitney Statistic

October 16, 2008
Author(s)
James H. Yen
Meta analysis, the statistical synthesis of results from several different studies, often involves combining estimates of effect sizefrom several experiments. The standardized mean difference is one of the most commonly used estimates of effect size

An Investigation of Discrimination Capacity and the Cause of Null Alleles in Linear Array Mitostrips Using Control Region Sequence Data.

October 16, 2008
Author(s)
Michael D. Coble, Margaret C. Kline, Janette W. Redman, Amy E. Decker, Peter Vallone, John Butler
Mitochondrial DNA (mtDNA) analysis of forensic evidentiary materials such as degraded bones and shed hairs can provide the forensic scientist with some genetic information especially when highly discriminatory systems, such as nuclear STRs, completely fail

An Observable Measure of Multiqubit Entanglement for Pure States

October 16, 2008
Author(s)
G K. Brennen
Recently, Meyer and Wallach [D.A. Meyer and N.R. Wallach (2002), J. of Math. Phys., 43, pp. 4273] proposed a measure of multi-qubit entanglement that is a function on pure states. We find that this function can be interpreted as a physical quantity related

An Optical Sensor for Measuring Fluorescence Anisotropy of Oriented Polymers

October 16, 2008
Author(s)
S C. Roth, Anthony J. Bur
An optical sensor containing polarizing optical components has been constructed for the purpose of measuring fluorescence anisotropy of fluorescent dyes. The measurement involves the detection of vertical and horizontal components of fluorescent light

Analyses of QC Materials for Huntington s Disease Genetic Testing

October 16, 2008
Author(s)
J P. Jakupciak, Kristy L. Richie
The expansion of molecular testing using nucleic acid technologies in clinical and public health practice has increased the need for appropriate reference materials and verified quality control (QC) materials for quality assurance, test validation

Analysis of High-Resolution Infrared and N 1 CARS Spectra of 34 S 18 O 3

October 16, 2008
Author(s)
Tony Masiello, J Barber, E T. Chrysostom, J Nibler, A G. Maki, A Weber, Thomas A. Blake, R L. Sams
Three fundamental modes and several hot bands of 34S 18O 3 have been investigated using both infrared spectroscopy and coherent anti-Stokes Raman scattering spectroscopy (CARS). Coriolis coupling effects are particularly noticeable in 34S 18O 3 due to the
Displaying 29351 - 29375 of 73697
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