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Displaying 14301 - 14325 of 73898

A Direct Error Measure for Affine Models of Nonlinear Algebraic Systems

February 19, 2017
Author(s)
D M. Lorenzetti
This paper proposes a measure of the deviation between a nonlinear equation and its affine model, and demonstrates applications to nonlinear systems. The measure expresses the model error relative to a representative change in its predicted value

A Performance-Based Analysis of a Hotel Building Using Two Egress Models

February 19, 2017
Author(s)
Erica D. Kuligowski, James A. Milke
This report compares results from similar egress models based on documented evacuation movement data. When EXIT89 and Simulex1 are used to 1) simulate the same design scenarios and 2) perform a bounding analysis of the hotel building, differences in egress

A Re-Examination of a Specific Surface Area Research Material

February 19, 2017
Author(s)
Dennis B. Minor
Specific surface area(SSA) analysis is one of the most common, quick, and inexpensive techniques used in analytical laboratories to characterize a variety of solid materials using a variety of gases. The technique is not labor intensive, can yield results

A Simple Model of Fireball Dynamics

February 19, 2017
Author(s)
Howard R. Baum, Ronald G. Rehm
An analytical model of the initial expansion of a fireball is presented.The model is based on an exact solution of the low Mach number combustion equations in the form initially proposed by the authors. The equations consist of the conservation of mass

A Simple Model of the WTC Fireball Dynamics

February 19, 2017
Author(s)
Howard R. Baum, Ronald G. Rehm
An analytical model of the initial expansion of a fireball is presented.The model is based on an exact solution of the low Mach number combustion equations in the form initially proposed by the authors. The equations consist of the conservation of mass

A Technical Guide for Smokeview Version 5

February 19, 2017
Author(s)
Glenn P. Forney
Smokeview is a software tool designed to visualize numerical calculations generated by the NIST Fire Dynamics Simulator (FDS), a computational fluid dynamics (CFD) model of fire-driven fluid flow. This report documents some of the technical details and

Abrasive Machining of Glass-Infiltrated Alumina with Diamond Burs

February 19, 2017
Author(s)
L Yin, L K. Ives, S Jahanmir, E D. Rekow, E Romberg
The abrasive machining characteristics of a glass-infiltrated dry-pressed alumina used for fabrication of all-ceramic dental crowns are investigated using a high-speed dental handpiece and diamond burs containing supercoarse (180 m), fine (40 m), and

ACerS-NIST Phase Equilibria Diagrams Volume XIV Oxides

February 19, 2017
Author(s)
Robert S. Roth, Terrell A. Vanderah
This volume is the fourteenth of the topically-oriented series of phase diagram compilations and the tenth to appear since the National Institute of Standards (NIST) and the American Ceramic Society (ACerS) embarked on a jointly-sponsored expanded Ceramic

Advances in Atomic Structure Calculations

February 19, 2017
Author(s)
Charlotte F. Fischer
Correlation and relativistic effects are both needed for accurate atomic structure calculations of energy levels and their atomic properties. For transition probabilities between low-lying levels of a spectrum, accurate wave functions for the outer region

Advances in Thermal Imaging Technology in the First Responder Arena

February 19, 2017
Author(s)
Francine K. Amon, Nelson P. Bryner
The Building and Fire Research Laboratory (BFRL) at the National Institute of Standards and Technology (NIST) has been conducting research that will provide a quantifiable physical and scientific basis upon which industry standards for imaging performance

Aerodynamic Damping in the Along-Wind Response of a Tall Building

February 19, 2017
Author(s)
Rene D. Gabbai, Emil Simiu
We present an estimate of the aerodynamic damping that affects the along-wind response of an isolated tall building in suburban terrain. The evaluation uses measurements of the external pressures on the windward and leeward faces under wind normal to a

AEX XML Schema Reference Guide

February 19, 2017
Author(s)
Mark E. Palmer, M Burns, T L. Teague, Mary Turton, Rurik Turton
The AEX XML Schema Reference Guide summarizes the design principles and the structures of the AEX (Automating Equipment Information eXchange) XML schemas, guidance for making schema extensions and usage guidance for those who wish to deploy the AEX schemas

Alert Categorization, Revision 1.0

February 19, 2017
Author(s)
Alan B. Vinh
There are many types of sensor devices available in today s market with many still in development. These devices send signals representing the detection of entities such as temperature and smoke. With the availability of sensor devices monitoring various

An Exception to Amontons' Law: The Friction of Carbon Surfaces in Air

February 19, 2017
Author(s)
P M. McGuiggan
The friction of carbon has been of much interest in recent years due to its good tribological properties. These properties include high wear resistance, high hardness, low friction coefficients, and low corrosion. 1 In computer hard disks, the magnetic
Displaying 14301 - 14325 of 73898
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