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Displaying 1301 - 1325 of 3873

A Stokes Permeability Solver for Three-Dimensional Porous Media

April 4, 2007
Author(s)
Dale P. Bentz, Nicos Martys
A set of C and Fortran computer programs have been developed for computing the permeability of three-dimensional porous media under incompressible Stokes flow conditions. In this NISTIR, the background for developing these codes is reviewed and the

Uniaxial Crushing of Cellular Sandwich Plates Under Air Blast

April 3, 2007
Author(s)
Joseph A. Main, George A. Gazonas
Sandwich plates with cellular metal cores are being widely considered for blast mitigation applications, due largely to the energy absorption capacity of the cellular core material. Computational simulations have shown that sandwich plates exhibit reduced

A Low Cost Digital Vibration Meter

April 1, 2007
Author(s)
William V. Payne, Jon Geist
This report describes the development of a low cost vibration amplitude sensor. The processes used to develop this sensor involve the use of Micro-Electronic and Mechanical Systems (MEMS) manufacturing techniques. The major mechanical element of the

Vibration of Tensioned Beams with Intermediate Damper. II: Damper Near Support

April 1, 2007
Author(s)
Joseph A. Main, Nicholas P. Jones
Exact analytical solutions are used to investigate the complex eigenfrequencies of tensioned beams with a viscous damper attached transversely near a support, for which the complex eigenfrequencies remain fairly close to their undamped values. This problem

ASHRAE Standard 62.1: Problems, Perceptions and Panaceas?

March 1, 2007
Author(s)
Andrew K. Persily, Dennis Stanke, Gordon Holness, Richard Hermans
ASHRAE Standard 62 was first published in 1973, with the title Standards for Natural and Mechanical Ventilation [REF]. The most recent version (designated as 62.1 and titled Ventilation for Acceptable Indoor Air Quality) was published in 2004, with some

Building Retrofits for Increased Protection Against Airborne Chemical and Biological Releases

March 1, 2007
Author(s)
Andrew K. Persily, Robert E. Chapman, Steven J. Emmerich, William S. Dols, Heather Davis, Priya D. Lavappa, Amy S. Rushing
Due to concerns about potential airborne chemical and biological (chembio) releases in or near buildings, building owners and managers and other decision makers are considering retrofitting buildings to provide some degree of protection against such events

Verification and Validation--How to Determine the Accuracy of Fire Models.

March 1, 2007
Author(s)
Mark H. Salley, Jason Dreisbach, Kendra Hill, Bijan Najafi, Francisco Joglar, Anthony Hamins, Kevin B. McGrattan, Richard Peacock, Robert Kassawara
Both domestically and worldwide, there is a movement to introduce risk-informed and performance-based analyses into fire protection engineering practice. One key tool needed to support risk-informed, performance-based (RI/PB) fire protection is fire models

Localized Residential Fire Suppression Systems (NIST SP 1006)

February 1, 2007
Author(s)
Daniel M. Madrzykowski
A Presentation by Daniel Madrzykowski. Localized Residential Fire Suppression Systems: -Kitchen fire hazard characterization. -Investigate "passive" and "active" fire protection systems. -Full-scale demonstrations/evaluations.

Structural Collapse Research at NIST

January 1, 2007
Author(s)
D W. Stroup, Nelson P. Bryner
Approximately 20 % of fire fighters killed at structure fires over the past ten years have been as a result of structural collapse. Predicting a structural collapse is one of the most challenging tasks facing an incident commander at a fire scene. Usually
Displaying 1301 - 1325 of 3873
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