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Displaying 11251 - 11275 of 17277

ZigBee-Wireless Mesh Networks for Building Automation and Control

April 12, 2010
Author(s)
Wenqi Guo, William M. Healy, Mengchu Zhou
ZigBee is a wireless technology developed as an open global standard to address the unique needs of low-cost low-power wireless sensor networks. This standard takes full advantages of the IEEE 802.15.4 physical radio specification and operates in

Treatment of Uncertainties in Radiation Dosimetry

August 18, 2009
Author(s)
Michael G. Mitch, Larry DeWerd, Ronaldo Minniti, J Williamson
… with those of other laboratories, including primary standards laboratories? To answer these questions, it is … in dosimetry measurements and calculations, for primary standards to clinical practice. …

A proposed laser frequency comb based wavelength reference for high resolution spectroscopy

September 12, 2007
Author(s)
Steve Osterman, Scott A. Diddams, Matthew Beasley, Cynthia Froning, Leo W. Hollberg, Phillip MacQueen, Vela Mbele, Andrew Weiner
… technology in development at the National Institute of Standards and Technology in Boulder, Colorado, to the needs … has the potential to extend the two current wavelength standards both in terms of spectral coverage and in terms of …

Cost-Effectiveness Tool Primer: Software Overview

January 31, 2006
Author(s)
Robert E. Chapman, Amy S. Rushing
… hazards. Economic tools include evaluation methods, standards that support and guide the application of those … descriptions of the evaluation methods and associated standards are presented in NISTIR 7073. This document focuses …

Systematic Approach for Describing the Geometry of Spectrophotometry

August 1, 2003
Author(s)
E A. Early
… describe the measurement geometry. Many documentary standards specify the geometry for a particular application. … which will hopefully contribute positively to documentary standards. The key to describing the geometry is to consider …

Uncertainty Calculation for the Ratio of Dependent Measurements

June 1, 2003
Author(s)
C M. Wang, H K. Lyer, J Hannig
In this paper we consider the problem of computing an uncertainty interval a ratio with a prescribed confidence level. Although an exact confidence interval procedure, known as the Fieller interval, is available for this problem, practitioners often use

Ultrastable Laser Array at 633 nm for Real-Time Dimensional Metrology

July 1, 2001
Author(s)
John R. Lawall, J Pedulla, Y LeCoq
We describe a laser system for very high-accuracy dimensional metrology. A sealed-cavity helium-neon laser is offset-locked to an iodine-stabilized laser in order to realize a secondary standard with higher power and less phase noise. Synchronous averaging

A New Type of Frequency Chain and its Application to Fundamental Frequency Metrology

June 1, 2001
Author(s)
Thomas Udem, J Reichert, R Holzwarth, Scott Diddams, D J. Jones, Jun Ye, S T. Cundiff, T W. Hansch, John L. Hall
… andrecalibrate several important optical frequency standards. In particular, the improved measurement of the … In addition, several of the best-known optical frequency standards have beenrecalibrated via the fs method. By …

An Optical Clock Based on a Single Trapped Hg + Ion

January 1, 2001
Author(s)
Scott A. Diddams, T Udem, K R. Vogel, Christopher W. Oates, E A. Curtis, W D. Lee, Wayne M. Itano, Robert E. Drullinger, James C. Bergquist, Leo W. Hollberg
… Microwave atomic clocks have been the de facto standards for precision time and frequency metrology over the …
Displaying 11251 - 11275 of 17277
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