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NIST Authors in Bold

Displaying 30826 - 30850 of 74129

Assessment of measurement uncertainty via observation equations

December 3, 2007
Author(s)
Antonio M. Possolo, Blaza Toman
According to the Guide to the Expression of Uncertainty in Measurement, measurement uncertainty is assessed by computational propagation of error based on a measurement equation that expresses the measurand as a known function of input variables. However

Case Study in the Challenges of Integrating CNC Production and Enterprise Systems

December 3, 2007
Author(s)
Sid Venkatesh, B. Sides, John L. Michaloski, Frederick M. Proctor
Integration of factory floor Computer Numerical Control (CNC) information into Enterprise Resource Planning (ERP) subsystems has been difficult, if not impossible, as traditionally, factory floor machines have been islands of automation. Boeing/NIST/Okuma

Grouping Sensory Primitives for Object Recognition and Tracking

December 3, 2007
Author(s)
Rajmohan Madhavan, M Foedissch, Tommy Chang, Tsai Hong Hong
In this paper, we describe our recent efforts in grouping sensory data into meaningful entities. Our grouping philosophy is based on perceptual organization principles using gestalt hypotheses where we impose structural regularity on sensory primitives

Investigations into the potential contribution of a thermal mechanism for pulsed-high intensity focused ultrasound mediated delivery

December 3, 2007
Author(s)
Brian E. O'Neill, Howard Vo, Mary Angstadt, Victor Frenkel, Bradford Wood, Timothy P. Quinn
The mechanism behind pulsed high intensity focused ultrasound (pHIFU) effects leading to increased drug delivery are currently poorly understood. In this work, the thermal dose and peak temperatures associated with a typical pHIFU treatment were measured

Performance of a Cryocooled Nb DC Programmable Voltage Standard at 4 K

December 3, 2007
Author(s)
Robert J. Webber, Charles J. Burroughs, Masoud Radparvar
We report on the performance of a 1 Volt DC programmable Josephson voltage standard (PJVS) operating on a commercially available Gifford-McMahon (G-M) cryocooler at 4 K. The NIST-fabricated niobium superconductor-normal metal-superconductor (SNS) junction

Smart Cards for Mobile Devices

December 3, 2007
Author(s)
Wayne Jansen, Serban I. Gavrila, Clement Seveillac
While mobile handheld devices provide productivity benefits, they also pose new risks. User authentication is the best safeguard against the risk of unauthorised use and access to a device¿s contents. This paper describes two novel types of Smart Card (SC)

Analysis of Inter-laboratory Testing of Non-loadbearing Gypsum/Steel-Stud Wall Assemblies

December 1, 2007
Author(s)
William L. Grosshandler, Samuel L. Manzello, Alexander Maranghides, T Mizukami
This report summarizes the results of a test program conducted in 2006 and 2007 by the North American Fire Testing Laboratories (NAFTL) consortium. Gypsum/steel-stud wall assemblies, nominally rated at 1-h, were tested by six different organizations in

Evaluation of a Capacitance Scaling System

December 1, 2007
Author(s)
Svetlana Avramov-Zamurovic, Andrew D. Koffman, Bryan C. Waltrip, Yicheng Wang
A capacitance scaling system from 10 nF to 100 mF [1], [2] has been implemented at the National Institute of Standards and Technology (NIST). Standard four-terminal-pair (4TP) capacitors are characterized using a capacitance scaling calibration procedure

Foam-based optical absorber for high-power laser radiometry

December 1, 2007
Author(s)
Krishna Ramadurai, Christopher L. Cromer, Xiaoyu X. Li, Roop Mahajan, John H. Lehman
We report damage threshold measurement results for novel absorbers comprised of either liquid-cooled silicon carbide or vitreous carbon foams. The measurements demonstrate damage thresholds up to 1.6×10^+4 W/cm 2 at an incident circular spot size of 2 mm

Indoor Localization: Technology That Can Save First Responder Lives

December 1, 2007
Author(s)
Nader Moayeri, Camillo A. Gentile, Kamran Sayrafian, Michael R. Souryal
Every year a number of first responders lose their lives while battling fires or rescuing civilians during such emergencies. Indoor localization or location tracking roughly provides the same capability inside buildings that GPS does outdoors. It allows a

Multilayers for Next Generation X-Ray Sources

December 1, 2007
Author(s)
Sasa Bajt, H N. Chapman, E Spiller, S Hau-Riege, J Alameda, A J. Nelson, C C. Walton, B Kjornrattanawanich, Andrew Aquila, Charles Tarrio, Steven Grantham
Multilayers are artificially layered structures that can be used to create optics and optical elements for a broad range of x-ray wavelengths, or can be optimized for other applications. The development of next generation x-ray sources (synchrotrons and x

NIST Fire Fighter Technology Program Overview (NIST SP 1051)

December 1, 2007
Author(s)
Nelson P. Bryner
The Advanced Fire Service Technologies (AFST) Program objectives are to (*) Provide the science and performance metrics for development and implementation of new technology, (*) Enable an information-rich environment, firefighter training tools, and

NIST Primary Frequency Standards and the Realization of the SI Second

December 1, 2007
Author(s)
Michael A. Lombardi, Thomas P. Heavner, Steven R. Jefferts
As the base unit of time interval, the second holds a place of preeminence in the world of metrology. Time interval, and its reciprocal, frequency, can be measured with more resolution and less uncertainty than any other physical quantities. The precise

Performance of Home Smoke Alarms Analysis of the Response of Several Available Technologies in Residential Fire Settings (NIST TN 1455-1)

December 1, 2007
Author(s)
Richard W. Bukowski, Richard D. Peacock, Jason D. Averill, Thomas G. Cleary, Nelson P. Bryner, William D. Walton, Paul A. Reneke, Erica D. Kuligowski
This report presents the results of the project and provides details of the response of a range of residential smoke alarm technologies in a controlled laboratory test and in a series of real-scale tests conducted in two different residential structures

Portable X-Ray Systems for Use in Bomb Identification and Interdiction

December 1, 2007
Author(s)
Nicholas G. Paulter Jr.
The NIJ Standard for Portable X-Ray Systems is a minimum performance standard as applied to the man-portable battery-powered x-ray systems for use by bomb technicians and investigators. These systems comprise the x-ray generator, the image acquisition
Displaying 30826 - 30850 of 74129