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Buildings & Construction

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Displaying 1426 - 1450 of 3873

Evaluation of Aerodynamic Drag and Torque for External Tanks in Low Earth Orbit

May 1, 2006
Author(s)
William C. Stone, Christoph J. Witzgall
A numerical procedure is described in which the aerodynamic drag and torque in low Earth orbit are calculated for a prototype Space Shuttle external tank and its components, the "LO2" and "LH2" tanks, carrying liquid oxygen and hydrogen, respectively, for

Damping of Stay-Cable Vibrations: Modeling Overview and Design Implications

April 25, 2006
Author(s)
Joseph A. Main, Nicholas P. Jones
Dampers have become widely accepted as an effective means of stay-cable vibration suppression and have been implemented on numerous bridges around the world. Dampers are typically attached to the stays transversely near the anchorages, and different types

Engineered Infills for Concrete Barriers

April 3, 2006
Author(s)
Kenneth A. Snyder, C Langton, B Clark, Chiara C. Ferraris, J Dawson
Entombment may be considered as an option for decommissioning nuclear concrete structures so that licenses for facilities on which these structures reside may be terminated. Prior to entombment, the nuclear facility permanently ceases operations and spent

Remotely Accessed Photovoltaic Power Experiment

March 21, 2006
Author(s)
W J. Hutzel, William M. Healy
A solar energy experiment that estimates the number of photovoltaic panels needed to provide supplemental power for a typical residence is described. The project is unique because it uses freely available on-line resources for collecting and analyzing

Characterizing Gaseous Air Cleaner Performance in the Field

March 20, 2006
Author(s)
Cynthia H. Reed, Steven J. Emmerich, Steven J. Nabinger
As part of an ongoing effort to better understand the performance of indoor air cleaners in buildings, the National Institute of Standards and Technology (NIST) has completed a series of gaseous air cleaner field tests and model simulations. This paper

Elevator Controls

March 1, 2006
Author(s)
Richard W. Bukowski, R P. Fleming, Jeffrey Tubbs, Christopher Marrion, Jill Dirksen, Chris Duke, Debbie Prince, Lee F. Richardson, Dave Beste, Dottie Stanlaske
The development of firefighter elevators and special application egress elevators is reviewed. Recent activities of the elevator industry and NIST to develop standards and building code requirements for elevators for use by the fire service and by

Using LADAR to characterize the 3-D shape of aggregates: Preliminary results

March 1, 2006
Author(s)
Edward J. Garboczi, Geraldine S. Cheok, William C. Stone
In previous publications, we have shown how using x-ray computed tomography to obtain the raw 3-D data for the coordinates of the surface, and then converting this raw data into an analytical function for the surface via an expansion in spherical harmonic

In-Flight Suppressant Deployment Temperatures

February 28, 2006
Author(s)
Donald Bein
This report describes review of DoD military fixed-wing and rotary aircraft fire mishap/incident data applicable to assess temperatures at which aircraft fire suppressants have been deployed in engine nacelle and APU compartment fires. Another model is

Modeling the Influence of Limestone Filler on Cement Hydration in CEMHYD3D

February 1, 2006
Author(s)
Dale P. Bentz
The ASTM C150 standard specification for portland cement now permits the addition of up to 5 % limestone filler. While these and much higher levels of limestone filler substitution have been employed in Europe and elsewhere for many years, the change in

R-22 Replacement Status (in Italian)

February 1, 2006
Author(s)
J M. Calm, Piotr A. Domanski
Since its initial recognition in 1928 and commercialization in 1936, R-22 has been applied in systems ranging from the smallest window air conditioners to the largest chillers and heat pumps, including those for district cooling and heating. Individual

Cost-Effectiveness Tool Primer: Software Overview

January 31, 2006
Author(s)
Robert E. Chapman, Amy S. Rushing
Economic tools are needed to help the owners and managers of buildings, industrial facilities, and other critical infrastructure to select cost-effective combinations of mitigation strategies that respond to natural and man-made hazards. Economic tools

A Review of the History of Fire Suppression of U.S. DOD Aircraft

January 1, 2006
Author(s)
Donald Bein
A review of the history of fire suppression on U.S. Department of Defense (DoD) aircraft is presented to provide a context against which the findings of the Next Generation Fire Suppression Technology Program (NGP) can be assessed. These findings are to be
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