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NIST Authors in Bold

Displaying 36951 - 36975 of 73697

Measurement of the Optical Extinction Coefficient of Combustion-Generated Aerosol

February 1, 2005
Author(s)
J F. Widmann, J X. Duchez, Joseph M. Conny, George W. Mulholland
This note describes mesurements of the optical extinction coefficient of carbonaceous aerosol produced during hydrocarbon combustion. Measurements of the mass specific extinction coefficient were obtained by laser extinction at 632 nm wavelength. The

Measuring the Permittivity and Permeability of Lossy Materials: Solids, Liquids, Metals, and negative-Index Materials

February 1, 2005
Author(s)
James R. Baker-Jarvis, Michael D. Janezic, Billy F. Riddle, Robert T. Johnk, Christopher L. Holloway, Richard G. Geyer, Chriss A. Grosvenor
The goal of this report is to be a comprehensive guide for researchers int he area of dielectric and magnetic measurements of lossy materials. The goal is to assemble the relevant information needed to perform and interpret dielectric measurements on lossy

Mixture Proportioning for Internal Curing

February 1, 2005
Author(s)
Pietro Lura, J W. Roberts
A methodology is presented for the mixture proportioning of ordinary Portland cement concretes to supply internal curing via the addition of saturated lightweight fine aggregates. The necessary internal curing water is calculated to balance the water

NIST Biometric Evaluations and Developments

February 1, 2005
Author(s)
Michael D. Garris, Charles L. Wilson
This paper presents an R&D framework used by the National Institute of Standards and Technology (NIST) for biometric technology testing and evaluation. The focus of this paper is on fingerprint-based verification and identification. Since 9-11 the NIST

Personal Identity Verification (PIV) of Federal Employees and Contractors

February 1, 2005
Author(s)
William Barker, James F. Dray Jr., Ramaswamy Chandramouli, Teresa T. Schwarzhoff, Tim Polk, Donna F. Dodson, Ketan Mehta, S Gupta, William E. Burr, Timothy Grance, National Institute of Standards and Technology (NIST)
[Superseded by FIPS 201-1 (March 2006): http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50836] FIPS 201 specifies the technical and operational requirements for interoperable PIV systems that issue smart cards as identification credentials and

Redesign of the 112.5 kN Dead Weight Machine Snubber System

February 1, 2005
Author(s)
Kevin L. Chesnutwood
This paper forcuses on the redesign of the snubber system that is used in the 112.5kN dead weight machine located at the National Institute of Standards and Technology in Gaithersburg, Maryland. Obstacles that were overcame pertaining to the original

Science at the Speed of Thought

February 1, 2005
Author(s)
J E. Devaney, Steven G. Satterfield, John T. Kelso, Adele Peskin, William L. George, John G. Hagedorn, Terence J. Griffin, Howard Hung, R D. Kriz

Seamless and Secure Mobility

February 1, 2005
Author(s)
Nada T. Golmie
We examine the performance of multimodal biometric authentication systems using state-of-the-art Commercial Off-the-Shelf (COTS) fingerprint and face biometric systems on a population approaching 1,000 individuals. Majority of prior studies of multimodal

Single-wall Carbon Nanotube Coating on a Pyroelectric Detector

February 1, 2005
Author(s)
John H. Lehman, Chaiwat Engtrakul, Thomas Gennett, Anne Dillon
Carbon single-wall nanotubes (SWNTs) are studied as the thermal-absorption coating on a large area pyroelectric detector. The SWNTs were produced by a laser vaporization method and dispersed onto the detector surface by use of a simple airbrush technique

Soft-Decision Decoding Error Probability Bounds for OFDM/QAM

February 1, 2005
Author(s)
Leonard E. Miller
We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all handled

Synopsis of the 2004 ASMS Fall Workshop on Polymer Mass Spectrometry

February 1, 2005
Author(s)
William E. Wallace
This year s fall workshop of the American Society for Mass Spectrometry was on the topic of synthetic polymer mass spectrometry and was chaired by Robert P. Lattimer (Noveon, Inc.) and Chrys Wesdemiotis (University of Akron, Department of Chemistry). The

The Rotational Spectrum of the Ground State of Methylamine

February 1, 2005
Author(s)
Vadim V. Ilyushin, E A. Alekseev, S F. Dyubkoa, R A. Motiyenkoa, Jon T. Hougen
Recent progress is reported in measuring, assigning and fitting the rotational spectrum of the ground vibrational state of methylamine, CH3NH2, a spectrum complicated both by internal rotation of the methyl top and by inversion of the amino group. New
Displaying 36951 - 36975 of 73697
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