NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
A set of C and Fortran computer programs have been developed for computing the permeability of three-dimensional porous media under incompressible Stokes flow conditions. In this NISTIR, the background for developing these codes is reviewed and the
Sandwich plates with cellular metal cores are being widely considered for blast mitigation applications, due largely to the energy absorption capacity of the cellular core material. Computational simulations have shown that sandwich plates exhibit reduced
This report describes the development of a low cost vibration amplitude sensor. The processes used to develop this sensor involve the use of Micro-Electronic and Mechanical Systems (MEMS) manufacturing techniques. The major mechanical element of the
Cheol D. Park, Paul A. Reneke, Michael A. Galler, Steven T. Bushby, William D. Davis
As part of a Cybernetic Building Systems project at the NIST Building and Fire Research Laboratory, a whole building emulator called the Virtual Cybernetic Building Testbed (VCBT) has been developed. The VCBT combines simulation tools with commercial
This investigation compares the Heating Seasonal Performance Factor (HSPF) and the high temperature heating capacity (Q(47)) ratings of Independent Coil Manufacturers (ICMs) and Original Equipment Manufacturers (OEMs) to determine the distribution of mixed
Inspired by the development of a collaborative plan on understanding wildland fires, their interaction with weather and the built environment, the National Institute of Standards and Technology (NIST) and the National Oceanic and Atmospheric Administration
Exact analytical solutions are formulated for the complex eigenmodes of tensioned beams with an intermediate viscous damper. The problem is formulated using the dynamic stiffness method, and characteristic equations are obtained for both clamped and pinned
Exact analytical solutions are used to investigate the complex eigenfrequencies of tensioned beams with a viscous damper attached transversely near a support, for which the complex eigenfrequencies remain fairly close to their undamped values. This problem
In recent years, increasing interest has been shown in developing and designing slim floor systems in steel-framed buildings. This paper describes the results of a furnace test conducted on two full-scale composite steel frames with slim floor slab
Andrew K. Persily, Dennis Stanke, Gordon Holness, Richard Hermans
ASHRAE Standard 62 was first published in 1973, with the title Standards for Natural and Mechanical Ventilation [REF]. The most recent version (designated as 62.1 and titled Ventilation for Acceptable Indoor Air Quality) was published in 2004, with some
Andrew K. Persily, Robert E. Chapman, Steven J. Emmerich, William S. Dols, Heather Davis, Priya D. Lavappa, Amy S. Rushing
Due to concerns about potential airborne chemical and biological (chembio) releases in or near buildings, building owners and managers and other decision makers are considering retrofitting buildings to provide some degree of protection against such events
Stephen Kerber, Daniel M. Madrzykowski, D W. Stroup
One hundred and sixty experiments were conducted in a thirty-story vacant office building in Toledo, Ohio to evaluate the ability of fire department positive pressure ventilation fans to pressurize a stairwell in a high-rise structure in accordance with
Automation is being increasingly explored as a possible solution for safely increasing productivity in structural steelwork erection. The research investigates the extent to which the CIMsteel Integration Standards (CIS/2) can support automated steelwork
Experiments designed to characterize the ignition behavior of typical outdoor fuels by heated mufflers and catalytic converters found on outdoor power equipment are described. Ignition by direct contact with a heated surface and by radiation from a heated
Mark H. Salley, Jason Dreisbach, Kendra Hill, Bijan Najafi, Francisco Joglar, Anthony Hamins, Kevin B. McGrattan, Richard Peacock, Robert Kassawara
Both domestically and worldwide, there is a movement to introduce risk-informed and performance-based analyses into fire protection engineering practice. One key tool needed to support risk-informed, performance-based (RI/PB) fire protection is fire models
Economic tools are needed to help the owners, managers, and designers of constructed facilities to select cost-effective combinations of mitigation strategies that respond to natural and man-made hazards. Economic tools include evaluation methods
As integrated circuits become smaller and faster, the measurement of line width must have less uncertainty and more versatility. The common requirement for uncertainty is less than 10 nanometers. The industrial need for versatility is three dimensional
Aline Granier, Tinh Nguyen, Naomi Eidelman, Jonathan W. Martin
Carbon nanotubes (CNTs) have a wide range of potential applications due to their unique mechanical properties, high aspect ratios, and electronics structures. Many of these applications require good dispersion and chemical reactivity of CNTs in polymer
A Presentation by Daniel Madrzykowski. Localized Residential Fire Suppression Systems: -Kitchen fire hazard characterization. -Investigate "passive" and "active" fire protection systems. -Full-scale demonstrations/evaluations.
A series of full-scale fire experiments was conducted at NIST in 2003 to provide data for an international benchmarking exercise to validate fire models over a range of operating conditions expected within a variety of compartments in a nuclear power plant
This paper investigates the effect that an additive had on the boiling performance of an R134a/polyolester lubricant (POE) mixture and an R123/naphthenic mineral oil mixture on a roughened, horizontal flat surface. Both pool boiling heat transfer data and
Approximately 20 % of fire fighters killed at structure fires over the past ten years have been as a result of structural collapse. Predicting a structural collapse is one of the most challenging tasks facing an incident commander at a fire scene. Usually
A new correlation for two-phase flow pressure drop in 180? return bends is proposed based on a total of 241 experimental data points for R-22 and R-410A from two independent studies. The data span smooth tubes with inner diameters (D) from 3.3 mm to 11.6