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Displaying 27176 - 27200 of 74070

A Standards-based Global Ocean Monitoring System

August 16, 2009
Author(s)
Eugene Song, Kang B. Lee
This paper describes a standards-based global ocean monitoring system developed at the National Institute of Standards and Technology (NIST) with collaborating partners. This system adapts the Institute of Electrical and Electronics Engineers (IEEE) 1451

Adhesion and Mechanics of Complex Polymer Interfaces

August 16, 2009
Author(s)
Christopher M. Stafford, Jun Y. Chung, Heqing Huang, Adam J. Nolte, Peter M. Johnson, Edwin P. Chan
The structure and properties of polymer interfaces play an integral role in numerous technological applications, particularly in the areas of coatings and adhesives. These interfacial interactions are dependent on a host of factors, including interfacial

Differences in PDMS Modification Affect Laminin Deposition and Smooth Muscle Cell Response

August 16, 2009
Author(s)
Joy P. Dunkers, Hae-Jeong Lee, Marvi Matos, Lisa Pakstis, Juan M. Taboas, Steven D. Hudson, Marcus T. Cicerone
When culturing cells on flexible surfaces, it is important to consider extracellular matrix treatments that will remain on the surface under mechanical strain. Here we investigate differences in laminin surfaces that were deposited on oxidized PDMS (plasma

Nanoscale Photoresponse in Blended Organic Photovoltaics

August 16, 2009
Author(s)
Behrang H. Hamadani, Suyong S. Jung, Nikolai B. Zhitenev
Organic solar cells, which have attracted considerable interest over the last few years as low-cost, simply-processed alternatives for harvesting the solar energy, have interesting nanoscale properties; a thorough understanding of which is currently

Angle-resolved Optical Metrology using Multi-Technique Nested Uncertainties

August 15, 2009
Author(s)
Richard M. Silver, Bryan M. Barnes, Hui Zhou, Nien F. Zhang, Ronald G. Dixson
This paper introduces recent advances in scatterfield microscopy using improved normalization and fitting procedures. Reduced measurement uncertainties are obtained through the use of more accurate normalization procedures in combination with better

Applications of artificial neural networks in optical performance monitoring

August 15, 2009
Author(s)
Jeffrey A. Jargon, Xiaoxia Wu, Ronald Skoog, Loukas Paraschis, Alan Willner
Applications using artificial neural networks (ANNs) for optical performance monitoring (OPM) are proposed and demonstrated. Simultaneous identification of optical signal-to-noise-ratio (OSNR), chromatic dispersion (CD), and polarization-mode-dispersion

Conversion of laser optical rotation noise in cesium vapor

August 15, 2009
Author(s)
Ricardo Jimenez Martinez, Svenja A. Knappe, William C. Griffith, John E. Kitching
We have studied the noise in the optical rotation of a linearly polarized laser beam transmitted through a spin-polarized 133Cs vapor as a function of its frequency detuning from the optical resonance. Our measurements demonstrate the direct conversion of

Coalescing GSICS Correction Coefficients

August 14, 2009
Author(s)
Ruediger Kessel
We would like to present a technique to adjust the uncertainty estimates of each point in a time series, so that the variance of the time series is consistent with the uncertainty estimates of its component points. This would allow the uncertainty of the

Dynamic Gravitational Standard for Liquid Flow: Model and Measurements

August 14, 2009
Author(s)
Iosif I. Shinder, Michael R. Moldover
We report progress in testing a dynamic gravimetric standard using both steady and unsteady water flows. For steady flows in the range 10 kg/s to 60 kg/s, the difference between the dynamic standard and NIST s static primary standard was 0.015 % with a

The Calculation of Natural Gas Viscosity

August 14, 2009
Author(s)
Aaron N. Johnson, William Johansen
The calculation of natural gas viscosity has been implemented many different ways including the use of constants. Different methods of calculating natural gas viscosity may produce values with differences as large as 50%. Increasing natural gas prices

Use of ISO/IEC 24727

August 14, 2009
Author(s)
Hildegard Ferraiolo, Teresa T. Schwarzhoff, William I. MacGregor, Hung Dang, Ketan Mehta
This document describes the use of ISO/IEC 24727 in enabling client-applications to access identity credentials issued by different credential issuers.

ENABLING STANDARDS FOR NANOMATERIAL CHARACTERIZATION

August 13, 2009
Author(s)
Vincent A. Hackley, Martin Fritts, James F. Kelly, Anil K. Patri, Alan F. Rawle
A two-day international workshop was convened recently in order to scope out and address the urgent need for standards to accurately characterize the physico-chemical and biological properties of engineered nanomaterials. These standards are needed by

Recommended Practices for Homeland Security Modeling and Simulation

August 13, 2009
Author(s)
Sanjay Jain, Charles McLean
This paper recommends practices for development and deployment of modeling, simulation and analysis (MS&A) tools for homeland security applications. The set of recommended practices applicable to any MS&A application includes: software engineering practice

Performance of a Nanopositioner Controller Filter Compensator

August 12, 2009
Author(s)
Donna Le, Nicholas Dagalakis, Jason J. Gorman, Jae M. Yoo
We describe the use of appropriate type simple resistor and capacitor (RC) compensators, which properly connected to a power amplifier, can improve the dynamic performance of MEMS nanopositioners. Research on compensators led to the design of several
Displaying 27176 - 27200 of 74070