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Displaying 6276 - 6300 of 7113

JCPDS-ICDD Research Associateship (Cooperative Program With NBS/NIST)

November 1, 2001
Author(s)
Winnie K. Wong-Ng, H F. McMurdie, C R. Hubbard, Alan D. Mighell
The Research Associateship Program of the Joint Committee on Powder Diffraction -International Centre for Diffraction Data (JCPDS-ICDD, now known as the ICDD) at NBS/NIST was a long-standing (over 35 years), successful, industry-government cooperation. The

Standards for Collaborative Product Development

September 1, 2001
Author(s)
Ram D. Sriram
We are currently witnessing the emergence of an Internet-based engineering marketplace, where engineers, designers, and manufacturers from small and large companies are collaborating through the Internet to participate in RFQs (requests for quotes), create

Biometric Authentication Technology: From the Movies to Your Desktop

August 7, 2001
Author(s)
Fernando L. Podio, J S. Dunn
Biometrics are automated methods of identifying a person or verifying the identity of a person based on a physiological or behavioral characteristic. Biometric authentication technologies such as face, finger, hand, iris, and speaker recognition are

The NIST Industrial Thermometer Calibration Laboratory

June 1, 2001
Author(s)
C D. Vaughn, Gregory F. Strouse
The NIST Industrial Thermometer Calibration (ITC) Laboratory provides calibrations of industrial thermometers over the range from 196 C to 550 C. The different types of thermometers include liquid-in-glass (LiG), thermistors, thermocouples (

Development of NIST Standard Bullets and Casings Status Report

November 1, 2000
Author(s)
Jun-Feng Song, Theodore V. Vorburger, Alim A. Fatah
In April 1998, two prototype standard bullets were developed at the National Institute of Standards and Technology (NIST). In October 1999, prototype standard casings were also developed at NIST. The standard bullets and casings are intended for use in

Challenges in Developing Environmentally Safe Heat Pumping Systems

July 1, 2000
Author(s)
David Didion, J S. Brown
The advent of the global warming crisis has brought about a viewpoint, in many governments, that the halogen family of refrigerants should be replaced, in part or in toto, by the so-called natural refrigerants. For this proposal to be valid it is necessary

Effects of Cement PSD on Porosity Percolation and Self-Desiccation

August 1, 1999
Author(s)
Dale P. Bentz
The degree of self-desiccation in field concrete depends on the availability of external water to replace that consumed due to the chemical shrinkage that occurs during cement hydration. As the cement hydrates, the capillary porosity depercolates

Analytic Solution for a Non-Axisymmetric Isothermal Dendrite

March 1, 1999
Author(s)
Geoffrey B. McFadden, Sam R. Coriell, R F. Sekerka
The Ivantsov solution for an isothermal paraboloidal dendrite growing into a pure, undercooled melt provides a relation between the bulk undercooling and a dimensionless product, the Peclet number, of the growth velocity and tip radius of the dendrite

Cryptography Standards and Infrastructures for the Twenty-First Century

September 17, 1998
Author(s)
Shirley M. Radack
This bulletin reports on the progress being made by NIST and by its government and industry partners to advance the development of electronic commerce systems in which users will have confidence. There are efforts underway to update existing standards for

Personal Identification From Mugshot Ear Images

March 1, 1998
Author(s)
F E. McFadden
This work establishes the high value of ear images for personal identification from mugshot data, using the NIST database of police mugshots. It starts with a method for boundary analysis based on two innovations. First edge analysis is performed only

Field Modeling: Simulating the Effects of HVAC Induced Air Flow From Various Diffusers and Returns on Detector Response. International Fire Detection Research Project. Year 4 Report/Data

January 1, 1998
Author(s)
J H. Klote, William D. Davis, Glenn P. Forney, Richard W. Bukowski
Rapid activation of fire protection systems in response to a growing fire is one of the important factors required to provide for life safety and property protection. Airflow due to the heating, ventilating and air conditioning (HVAC) system can

Generalized Message Passing in a Virtual Reality Application

February 1, 1997
Author(s)
David W. Flater
The message passing semantics of an object-oriented programming language is one of the factors that determines how powerful the language is. Whether it is referred to as a method invocation, a dispatching call, an event, a signal, or something else, each

Unified Process Specification Language: Requirements for Modeling Process

January 1, 1996
Author(s)
Craig I. Schlenoff, Amy Knutilla, Steven R. Ray
A wide range of applications deal with the manipulation and expression of collections of activities. Examples include project management, workflow management, business process reengineering, product realization process modeling, manufacturing process

Comparison of a Fractal Smoke Optics Model With Light Extinction Measurements

January 1, 1994
Author(s)
R A. Dobbins, George W. Mulholland, Nelson P. Bryner
Optical cross-sections of carbonaceous aggregates (smoke) formed by combustion sources have been computed based on fractal concepts. Specific extinction depends upon the primary particle size, the structure of the aggregate as represented by the fractal
Displaying 6276 - 6300 of 7113
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