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Airborne particles are implicated in morbidity and mortality of certain high-risk subpopulations. Exposure to particles occurs mostly indoors, where a main removal mechanism is deposition to surfaces. Deposition can be affected by the use of forced-air
Until recently, visualization of 3D models required computational resources available only on desktop computers in office environments. With the advance of technology, it is now possible to visualize substantial 3D models on mobile handheld computers in
The Vulcan re-eld model is employed to simulate the evolution of pool res and the distribution of re suppressants in a engine nacelle simulator. The objective is to identify conditions for which suppression will and will not be successful in order to (1)
Seven concrete beams reinforced internally with steel and externally with carbon fiber-reinforced polymers (FRP) applied after the concrete had cracked were tested under four-point bending. Results show that FRP is very effective for flexural strengthening
The structure and suppression of laminar methane air co-flow diffusion flames formed on a cup burner have been studied experimentally and numerically using physically acting fire-extinguishing agents (CO2, N2, He, and Ar) in normal earth (1g) and zero
Christoph J. Witzgall, Javier Bernal, Geraldine Cheok
This report addresses the task of meshing point clouds by triangulated elevated surfaces referred to as TIN surfaces. It describes the general features of this approach, and refers to prototype TIN software employed at NIST for research into the analysis
P J. Disimile, J R. Tucker, Joe Stern, Luke Mehl, B Croswell
The current work is presented as part of an effort to help develop a spray transport model that would be used within the computational fire code currently under development by Sandia National Laboratory. As part of a halon replacement research program, new
The development of a virtual testing system is no small task. It requires fundamental scientific research into the physics, chemistry, and materials science of concrete. The Virtual Cement and Concrete Testing Laboratory consortium has identified three
The objective of this project was to develop a startup data set to guide the modeling efforts under the project "Fire Suppressant Dynamics in Cluttered DoD Weapon System Compartments (NGP 6A/1)," and to develop a parametric data set for model validation.
In order to facilitate nationwide analysis of ventilation and indoor air quality issues in residential buildings, a set of homes has been defined to represent the housing stock of the United States. This so-called suite of homes is based on two residential
Emil Simiu, Fahim Sadek, T Whalen, S Jang, L L. Lu, S M. Diniz, A Grazini, Michael A. Riley
Following Irminger's 1894 aerodynamic tests, Flachsbart's 1932 boundary-layer wind tunnel experiments, and University of Western Ontario (UWO) 1970's tests, considerable progress has been achieved in low-rise building design for wind. Nevertheless, the
This paper describes a fault detection method developed for application to variable-air-volume (VAV) boxes. VPACC (VAV Box Performance Assessment Control Charts) is a fault detection tool that uses a small number of control charts to assess the performance
This paper describes a fault detection method developed for application to variable-air-volume (VAV) boxes. VPACC (VAV Box Performance Assessment Control Charts) is a fault detection tool that uses a small number of control charts to assess the performance
In the last quarter of the 20th Century, building and fire research programs at the National Institute of Standards and Technology, formerly the National Bureau of Standards, provided one of the most significant sources of technology, measurements and
The CYCLE_D package simulates the vapor compression refrigeration cycles that use pure refrigerants or mixtures of refrigerants. The model can simulate a basic refrigeration cycle as well as a cycle with a liquidline/suction-line heat exchanger. CYCLE_D
Summarizes World Trade Center (WTC) investigation activities since the May 2003 progress report. Access has been obtained to nearly all of the important information needed for the investigation. The selection process for all major contractors and experts
Several studies have shown the importance of particle losses in real homes due to deposition; however, none have shown the impact of using a central forced air fan and in-duct filter on particle deposition rates. In an attempt to provide such data, this
The building automation industry is moving away from isolated building control systems toward building automation systems (BAS) integrated with business applications on a shared "IT" network. This open shared architecture allows not only for integration of
Opposed-flow flame spread over the surface of a semi-infinite solid has been a subject of much investigation in the past. Several elegant analytical flame spread models have also appeared in the literature. It is indeed fascinating to note how the authors