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Search Publications

NIST Authors in Bold

Displaying 2526 - 2550 of 3873

Thermal Agent Extinguishment of Two Types of Diffusion Flames

March 25, 2001
Author(s)
William M. Pitts, Rodney A. Bryant, Jiann C. Yang
The extinguishment of diffusion flames on two types of burners-an opposed-flow Tsuji burner and an axisymmetric burner with a surrounding coflow-by thermal agents has been investigated. Thermal agents are those that act primarily by extracting heat and

Nanomechanical Measurements of Polymeric Systems

March 13, 2001
Author(s)
Mark R. VanLandingham, Christopher C. White, Xiaohong Gu, Tinh Nguyen
Durability, in terms of service life, is often related to the failure due to service conditions of an unacceptable percentage of a product population. In many cases, this percentage is much less than 1 %, and thus the factors affecting early times-to

Toward Next-Generation Construction Machines

March 4, 2001
Author(s)
Roger V. Bostelman, James S. Albus, William C. Stone
Construction equipment is typically massive and operated manually with minimal use of sensors or computers for measurement or control. Research in the Intelligent Systems and Structures Divisions at the National Institute of Standards and Technology has

A Tool for Modeling Airflow & Contaminant Transport

March 1, 2001
Author(s)
William S. Dols
Multizone modeling refers to annalysis techniques that use a simplified, zonal representation of a building to study building airflows, pressure differences, and contaminant transport. Each zone is assumed to have uniform temperature, pressure, and

Critical Properties and Phase Separation in Lattice Boltzmann Fluid Mixtures

March 1, 2001
Author(s)
Nicos Martys, Jack F. Douglas
Basic equilibrium properties of Lattice Boltzmann (LB) fluid mixtures (coexistence curve, surface tension, interfacial profile, correlation length) are calculated to characterize the critical phenomena occurring in these model liquids and to establish a

Flammable and Combustible Liquid Spill/Burn Patterns

March 1, 2001
Author(s)
Anthony D. Putorti Jr., Jay A. McElroy, Daniel M. Madrzykowski
Discussions with fire investigators indicate that it would be beneficial to have the ability to predict the quantity of liquid fuel necessary to create a burn pattern of a given size. Full-scale spill and fire experiments were conducted with gasoline and

Laser Scanning for Construction Metrology

March 1, 2001
Author(s)
Geraldine S. Cheok, William C. Stone, Robert R. Lipman, Christoph J. Witzgall, Javier Bernal
This paper summarizes work at the National Institute of Standards and Technology (NIST) in the Non-Intrusive Scanning Technologies for Construction Assessment Project. It will briefly describe the initial proof-of-concept phase of this project, the

Mechanical Properties of High-Strength Concrete at Elevated Temperatures

March 1, 2001
Author(s)
Long T. Phan, Nicholas J. Carino
This report describes results of NIST's experimental program that focuses on effects of elevated temperature exposure on mechanical properties of hing strength concrete (HSC). Mechanical properties were measured by heating, with and without preload, the

Nanoindentation of Polymers: An Overview

March 1, 2001
Author(s)
Mark R. VanLandingham, John S. Villarrubia, William F. Guthrie, G F. Meyers
Indentation measurements made with atomic force microscopy (AFM) probes are relative measurements, largely due to the lack of information regarding the tip shape of the AFM probes. Also, current tip shape calibration procedures used in depth-sensing

Slab Effects in SMRF Retrofit Connection Tests

March 1, 2001
Author(s)
S A. Civjan, M D. Engelhardt, John L. Gross
A series of six full-scale subassemblages were tested to investigate dogbone and haunch retrofits for pre-Northridge steel moment connections. Tests included matched pairs of specimens, one bare steel and one including composite slab. Data were collected

State-of-the-Art Research Is the Future of Fire Investigation

March 1, 2001
Author(s)
Daniel M. Madrzykowski
Researchers at the National Institute of Standards and Technology's Building and Fire Research Laboratory are working with the U.S. Fire Administration; the bureau of Alcohol, Tobacco, and Firearms; and the U.S. Department of Justice to provide a more

Using BEES to Select Cost-Effective Green Products

March 1, 2001
Author(s)
Barbara C. Lippiatt, A Boyles
The BEES (Building for Environmental and Economic Sustainability) version 2.0 software implements a rational, systematic technique for selecting environmentall and economically balanced building products. The technique is based on consensus standards and

Characterization of Coating System Interphases with Phase Imaging AFM

February 1, 2001
Author(s)
Tinh Nguyen, Xiaohong Gu, Mark R. VanLandingham, M Giraud, R Dutruc-Rosset, R Ryntz, D Nguyen
The interphase between a polymer film and a substrate controls the adhesion and durability of a variety of polymeric systems including adhesives, coatings on plastics and metals, and electronic packaging. A polymeric coating system consists of a coating

Distributed Sensor Fire Detection (NIST SP 965)

February 1, 2001
Author(s)
Thomas G. Cleary, Kathy A. Notarianni
This paper details a case study that utilized model simulations to assess the relative performance benefits of distributed sensing over single-station, single-sensor smoke detection and co-located multi-sensor detection. 500 individual CFAST computer fire

Fire Emulator/Detector Evaluator: Design, Operation, and Performance (NIST SP 965)

February 1, 2001
Author(s)
Thomas G. Cleary, Michelle K. Donnelly, William L. Grosshandler
This paper describes the fire emulator/detector evaluator which was developed by NIST. The FE/DE has proven to be a very flexible design. The main function of the device is to reproduce the environment (temperature, air velocity, aerosol and gas species

How Interoperability Saves Money

February 1, 2001
Author(s)
Robert E. Chapman
The pressures of competing in the global marketplace are forcing building control companies, equipment and systems manufacturers, energy providers, utiliites, and design engineers to improve performance and reduce costs. One means of meeting this twin

Nanomechanical Characterization of Polymers Using Scanning Probe Microscopes

February 1, 2001
Author(s)
Mark R. VanLandingham
Scanning probe microscopy (SPM) has been used to study polymeric materials with nanometer spatial resolution. Indentation methods based on SPM technology include the use of cantilever probes with an atomic force microscope (AFM), depth-sensing transducers
Displaying 2526 - 2550 of 3873
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