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Displaying 36501 - 36525 of 74220

General Purpose Calculator for Outdoor Propagation Loss

February 1, 2005
Author(s)
Leonard E. Miller, Camillo Gentile, D Kaspar
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

Home Smoke Alarm Tests, Series 1, Report of Test FR 4016

February 1, 2005
Author(s)
Richard D. Peacock, Jason D. Averill, Richard W. Bukowski, Paul A. Reneke
This report documents the first test series in the program conducted to characterize the test environment. Data presented include CO, CO2, O2, smoke obscuration, and temperature. Additional measurement of smoke particle size and concentration, additional

Living With Uncertainty

February 1, 2005
Author(s)
Carl C. Miller, Yoshihiro Ohno
This article discusses measurement uncertainty. Definitions that are used in describing measurement uncertainty along with terms that should not be used. The significance and the procedure for calculating measurement uncertainty are presented.

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 C. Barker, James F. Dray Jr., Ramaswamy Chandramouli, Teresa T. Schwarzhoff, William T. Polk, Donna F. Dodson, Ketan L. Mehta, S Gupta, William E. Burr, Timothy Grance
[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
Displaying 36501 - 36525 of 74220