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NIST Authors in Bold

Displaying 34276 - 34300 of 74164

Analysis of Admixed CeO 2 Nanoparticles via TEM and X-Ray Diffraction Techniques

August 28, 2006
Author(s)
Andrew Vella, Rhys Whitley, N G. Armstrong, A Dowd, James Cline
The techniques used to identify nanoparticle size and shape characteristics are of vital importance in the development of functional nanoparticles. Each technique offers different advantages; this work compares the two techniques of transmission electron

A single-photon pump

August 25, 2006
Author(s)
Kevin Osborn, Mark W. Keller
We describe a gated quantum dot device called a single-photon pump that produces single photons on demand through the controlled tunneling of individual electrons and holes. Simulations using an InGaAs/GaAs dot show that two modes of operation are possible

HEMT Amplified SET Measurements of Individual InGaAs Quantum Dots

August 25, 2006
Author(s)
Kevin Osborn, Mark W. Keller, Richard Mirin
A High Electron Mobility Transistor (HEMT) is used with a Single Electron Transistor (SET) to measure single electrons tunnelling into individual InGaAs quantum dots. The SET detects the charge motion as an electron tunnels from an underlying n-doped layer

Robot Mapping for Rescue Robots

August 24, 2006
Author(s)
N Adluru, L J. Latecki, R Lakaemper, Rajmohan (. Madhavan
Rescue robots operate in disaster areas where odometric information is known to be highly unreliable. This paper presents a new approach to odometry independent 2D robot mapping. Scans obtained from different robot positions are assembled to a single

Characterization and Calibration of an Optical Time Domain Reflectometer Calibrator

August 23, 2006
Author(s)
Donald R. Larson, Nicholas Paulter, Kenneth C. Blaney
We report the results of an investigation into the signal characteristics and behavior of an instrument used to calibrate Optical Time Domain Reflectometers. This instrument implements the Telecommunications Industry Association standard TIA/EIA-455-226

Controlled Radical Polymerization in Confined Spaces

August 21, 2006
Author(s)
Kathryn L. Beers
Advanced polymeric materials in applications as diverse as tissue engineering, electronics and personal care products require superior control of a wide range of properties. From molecular properties such as molar mass and chain composition, to the

Metrics and Methodologies for Evaluating Technologies for Intelligence Analysts

August 21, 2006
Author(s)
Emile L. Morse, Michelle P. Steves, Jean C. Scholtz
In this paper we discuss the evaluation methodologies and metrics we have developed for ARDA's Novel Intelligence for Massive Data (NIMD) program. We discuss the challenges of developing methods and metrics in a situation where software components that

Connector-induced offsets in optical fiber power meters

August 20, 2006
Author(s)
Igor Vayshenker, Xiaoyu X. Li, Darryl A. Keenan
We discuss issues related to calibration of optical fiber power meters. The power readings may vary when using various types of fiber connectors, or even the same type of connectors made by different vendors. We study the connector effects by calibrating

Automating Thermo-Mechanical Warpage Estimation of PCBs/PCAs using a Design-Analysis Integration Framework

August 18, 2006
Author(s)
Manas Bajaj, Russell Peak, Dirk Zwemer, Thomas Thurman, Lothar Klein, Giedrius Liutkus, Kevin G. Brady, John V. Messina, Mike Dickerson
Accurate prediction, validation and reduction of thermally-induced PCB warpage are critical for enhancing manufacturing yield and reliability in time-to-market driven electronics product realization. In this paper, we describe a methodology to simulate

Electronically Induced Atom Motion in Engineered CoCu Nanostructures

August 18, 2006
Author(s)
Joseph A. Stroscio, Francesca M. Tavazza, Jason Crain, Robert Celotta, Anne M. Chaka
We have measured the quantum yield for exciting the motion of a single Co atom in CoCu n linear molecules constructed on a Cu(111) surface. The Co atom switched between two lattice positions during electron excitation from the tip of a scanning tunneling

Measuring Color Quality of Light Sources

August 17, 2006
Author(s)
Wendy L. Davis, Yoshihiro Ohno
The successful commercialization of solid-state lighting for general illumination will require an effective method to characterize the color quality of these sources. The distinctive spectral characteristics of solid-state lighting sources present both

Encapsulated Chondrocyte Response to Pulsatile Flow Bioreactor

August 16, 2006
Author(s)
James A. Cooper, W Li, L A. Bailey, Steven D. Hudson, Sheng Lin-Gibson, Kristi S. Anseth, Rocky Tuan, N Washburn
We have developed a bioreactor using microfluidic techniques that allow for dynamic culture conditions and measurement of the fluid flow impinging upon a three-dimensional (3-D) tissue engineering (TE) scaffold. Chondrocytes in scaffolds have been shown to

Correlation Filters for Elastic-Distorted Live-Scan Fingerprint Recognition

August 15, 2006
Author(s)
D P. Casasent, Craig I. Watson
This is a summary of a multi-year study of the use of distortion-invariant filters for recognition of live-scan dab fingerprints with elastic distortions. These fingerprints are characterized by elastic distortions. NIST special database 24 is used; it

Minimum-Phase Calibration of Sampling Oscilloscopes

August 15, 2006
Author(s)
Andrew M. Dienstfrey, Paul D. Hale, Darryl A. Keenan, Tracy S. Clement, Dylan F. Williams
We describe an algorithm for determining the minimum phase of a linear time-invariant response function from its magnitude. The procedure is based on Kramers Kronig relations in combination with auxiliary direct measurements of the desired phase response
Displaying 34276 - 34300 of 74164
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