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Displaying 37926 - 37950 of 74205

Template Fabrication of Protein-Functionalized Gold-Polypyrrole-Gold Segmented Nanowires

September 1, 2004
Author(s)
R M. Hernandez, Lee J. Richter, Stephen Semancik, Stephan J. Stranick, Thomas E. Mallouk
Gold nanowires containing protein-modified poly(pyrrole) (Ppy) junctions were synthesized electrochemically using porous aluminum oxide as a template. The effects of the conditions of electrochemical synthesis on Ppy growth and protein (avidin or

The NIST 3 Megawatt Quantitative Heat Release Rate Facility - Description and Procedures

September 1, 2004
Author(s)
Rodney A. Bryant, Thomas J. Ohlemiller, Erik L. Johnsson, Anthony P. Hamins, B S. Grove, William F. Guthrie, Alexander Maranghides, George W. Mulholland
The 3 Megawatt Heat Release Rate Facility was developed at NIST as a first step toward having broad capabilities for making quantitative large scale fire measurements. Such capabilities will be used at NIST to validate fire models and to develop sub-grid

Transformation of Phase Size Distribution Into Scattering Intensity

September 1, 2004
Author(s)
Barry J. Bauer
A practical method of calculating the small angle scattering intensity (SAS) and the density correlation function (CF) from the phase size distribution (PSD) is presented for a sample with a two-phase morphology. The CF can be calculated in terms of joint

Triple-Detector GPC Characterization and Processing Behavior of Long-Chain-Branched Polyethylene Prepared by Solution Polymerization With Constrained Geometry Catalyst

September 1, 2004
Author(s)
W Wang, S B. Kharchenko, Kalman D. Migler, S Zhu
Fourteen long-chain branched (LCB) polyethylene (PE) samples were prepared by a constrained geometry catalyst. The PE samples had average branching frequencies of 0.06 to 0.98 branches per polymer chain, determined by 13C NMR. These samples as well as five

Uncertainty Analysis of Radar Cross Section Calibration at Etcheron Valley Range

September 1, 2004
Author(s)
Lorant A. Muth, Dale M. Diamond, John A. Lelis
The Etcheron Valley Range, Naval Air Warfare Center, Weapons Division at China Lake, CA conducts monostatic and bistatic radar cross section measurements on various targets of interest to DoD. This document, which follows general guidelines proposed by the

Uncertainty and Traceability for the CEESI Iowa Natural Gas Facility

September 1, 2004
Author(s)
Aaron N. Johnson, Tom Kegel
This paper presents an uncertainty analysis for the CEESI Iowa natural gas calibration facility. This facility calibrates flow meters up to flows of 10.7 actual m3/s, at nominal pressures of 174 kPa. Flow meters are calibrated by a set of nine turbine

Uncertainty Propagation for NIST Visible Spectral Standards

September 1, 2004
Author(s)
J L. Gardner
Uncertainties in the NIST spectral standards for detectors and sources in the visible wavelength range are propagated from the high-accuracy cryogenic radiometer measurements, taking correlations into account at every stage. Partial correlations between

Parallel Adaptive Multilevel Methods With Full Domain Partions

August 31, 2004
Author(s)
William F. Mitchell
aptive multilevel methods are methods for solving partial differential equations that combine adaptive grid refinement with multigrid solution techniques. These methods have been shown to be very effective on sequential computers. Recently, a technique for

A Four-Terminal Current Shunt with Calculable AC Response

August 30, 2004
Author(s)
Owen B. Laug, T. M. Souders, Bryan C. Waltrip
The design of a 0.1 Ohm, four-terminal current shunt with calculable frequency dependence up to 1 MHz is described. It is intended for use as a standard for current measurements up to 10 A rms with the primary purpose of being able to tie alternating

Hydra User's Guide

August 30, 2004
Author(s)
Matthew L. Aronoff
This document is intended to be a User's Guide to Hydra. It is aimed toward the standards development engineers and other technical users who may be interested in using Hydra. Hydra is a three-dimensional XML viewer/editor that was developed to aid in

A New Technique for Estimating Frequency from GPS Carrier-Phase Time Transfer Data

August 28, 2004
Author(s)
C Hackman, Judah Levine, Tom Parker, Dirk Piester, Juergen Becker
GPS carrier-phase time transfer (GPSCP1T) offers high frequency stability at short averaging times, approaching a fractional frequency stability of 10-15 at averaging times of one day. However, a discontinuity occurs in the time transfer estimates between

Experimental Studies of Integrated Cognitive Systems

August 26, 2004
Author(s)
P Langley, Elena R. Messina
In this paper, we examine the issues that arise in the experimental study of integrated cognitive systems. We review the reasons why such artifacts are dicult to evaluate, then consider some dependent measures that can be used to characterize their

Autonomous Road Driving Arenas for Performance Evaluation

August 24, 2004
Author(s)
Christopher J. Scrapper Jr, Stephen B. Balakirsky, Brian Weiss
The development of performance metrics is critical in the evaluation and advancement of intelligent systems. Obtaining the pinnacle of intelligence in autonomous vehicles requires evolutionary standards and community support. In order to analyze and

Comparing Algorithms: Rules of Thumb and an Example

August 24, 2004
Author(s)
Stephen B. Balakirsky, Thomas R. Kramer
This paper provides twenty rules of thumb for comparing algorithms having the same function, one of which is to be selected for use in an intelligent system. The rules are illuminated by a specific example, the comparison of three algorithms for dealing
Displaying 37926 - 37950 of 74205