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Fire

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Displaying 2376 - 2400 of 3902

The Visible Cement Data Set

March 1, 2002
Author(s)
Dale P. Bentz, S Mizell, Steven G. Satterfield, J E. Devaney, William L. George, Peter M. Ketcham, James R. Graham, J E. Porterfield, Daniel A. Quenard, F A. Vallee, H Sallee, E Boller, J Baruchel
With advances in X-ray microtomography, it is now possible to obtain three-dimensional representations of a material's microstructure with a voxel size of less then one micrometer. The Visible Cement Data Set represents a collection of 3-D data sets

Determination of Planck Mean Absorption Coefficients for HBr, HCl, and HF

February 1, 2002
Author(s)
Stephen P. Fuss, Anthony P. Hamins
The Planck mean absorption coefficient has been calculated for HBr HCl, and HF over a temperature range from 300 K-2300 K using data from the 1996 edition of the HITRAN molecular database. Plots of ap versus temperature showed monotonically decreasing

Development of a Reliability-Based Method of Service Life Prediction for Sealant

February 1, 2002
Author(s)
Christopher C. White, C Buch, Mark R. VanLandingham
Standard test methods, such as ASTM C719, evaluate sealant performance though threshold test measurements. This method and its derivatives do not offer reliable predictions of in-service performance. This article will detail efforts to move away from the

E-Concrete? Believe It!

February 1, 2002
Author(s)
G J. Frohnsdorff, Edward J. Garboczi
In recent years, the complexity of concrete mixture proportioning has increased dramatically. New chemical admixtures, such as high-performance superplasticizers and shrinkage-reducing admixtures, have been introduced into the marketplace. Due to both

Effects of Crosslink Density on Surface and Interface Properties of Amine-Cured Epoxy

February 1, 2002
Author(s)
Xiaohong Gu, Tinh Nguyen, Mark R. VanLandingham, D T. Raghavan
The effect of network changes on the surface and interface properties of amine-cured epoxy has been investigated. Samples of different crosslinked epoxies are prepared by mixing stoichiometrically pure diglycidyl ether of bisphenol A (n=0.03) with

Measuring Droplet Arrival Times Using Phase Doppler Interferometry

February 1, 2002
Author(s)
J F. Widmann, Cary Presser
The difficulty of accurately measuring droplet arrival time statistics is demonstrated using phase Doppler interferometry (PDI) measurements obtained in water sprays produced by pressure-swirl atomizers. It is shown that Doppler burst splitting, in which

Using Sensor Signals to Analyze Fires

January 23, 2002
Author(s)
William D. Davis, Thomas G. Cleary, Michelle K. Donnelly, S. D. Hellerman
Building fire sensors are capable of supplying substantially more information to the fire service than just the simple detection of a possible fire. Nelson, in 1984, recognized the importance of tying all the building sensors to a smart fire panel. In

Prototype Software for Contaminant-Based Design

January 2, 2002
Author(s)
George Walton, Andrew K. Persily
Outdoor air intake rates of mechanical ventilation systems have traditionally been determined using prescriptive methods based on ventilation requirements per unit floor area or per occupant. This approach has serious shortcomings. It provides no

An Economic Assessment of Selected Integration and Automation Technologies

January 1, 2002
Author(s)
Robert E. Chapman
This paper presents a critical analysis of the economic impacts of past, ongoing, and planned research of BFRL's construction systems integration and automation technologies (CONSIAT) Program. The CONSIAT program is an interdisciplinary research effort

Elastic Properties of Model Random Three-Dimensional Open-Cell Solids

January 1, 2002
Author(s)
A P. Roberts, Edward Garboczi
Most cellular solids are random materials, while practically all theoretical structure-property relations are for periodic models. To generate theoretical results for random models the finite element method (FEM) was used to study the elastic properties of

Enhanced Powder Panels

January 1, 2002
Author(s)
D C. Cyphers, Scott A. Frederick, John P. Haas
Ballistic threat-induced fires are a major contributor to aircraft vulnerability. This paper describes a recent investigation of new concepts for powder panels, an old alternative for discharging dry chemical agents to extinguish combat-induced fires in

Experimental Study of a Water Droplet Impinging on a Liquid Surface

January 1, 2002
Author(s)
Samuel L. Manzello, Jiann C. Yang
An experimental study is presented for water droplet impingement on a liquid surface. The impaction process was recorded using a high-speed digital camera at 1000 frames per second. The initial droplet diameter was fixed at 3.1 mm 0.1 mm and all

Field Test of a Photovoltaic Water Heater

January 1, 2002
Author(s)
Arthur H. Fanney, Brian P. Dougherty, J O. Richardson
A solar photovoltaic water heating system has been installed at the Great Smoky Mountains National Park. The system provides hot water for the restroom facilities at the Park's main visitor center. This paper gives an overview of the technology, describes

Fluoroalkyl Phosphorus Fire Extinguishing Agents

January 1, 2002
Author(s)
R E. Tapscott, J M. Shreeve, J D. Mather
Phosphorus compounds show extraordinary effectiveness as flame extinguishants, and there is evidence for a chemical mechanism. Most work to date, however, has emphasized alkyl phosphonates and related materials or phosphonitriles. The former compounds are

Inhibition of Premixed and Non-Premixed Flames with Fine Droplets of Water and Solutions

January 1, 2002
Author(s)
Harsha K. Chelliah, A K. Lazzarini, P N. Wanigarathne, Gregory T. Linteris
Inhibition/extinction of premixed and non-premixed methane-air flames with fine-droplets of water and solutions containing several chemical agents are investigated experimentally. While solutions allow delivery of much higher concentrations of chemical

INTUMESCENT INSTANT FIREWALLS FOR LOW-COST FIRE PROTECTION

January 1, 2002
Author(s)
Ginger Bennett
Intumescent materials respond to impingement of a fire by swelling and forming a protective char that physically and thermally protects the structure. Intumescent materials have been used (or investigated for use) in various military platforms for all
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