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.
complishments and current standards development activities of the American Society for Testing and Materials (ASTM) Subcommittee E06.23, Lead Hazards Associated
We review briefly basic Melnikov theory for both deterministic and stochastic systems. We then show how the theory can be used for the identification of a class
Previously published laboratory studies have indicated that ultrasonic extraction/anodic stripping voltammetry (UE/ASV) may be suitable for quantitative field
This letter contains a discussion of the article in the May-June 1999 issue of the ACI Materials Journal on the Investigation of Chloride Diffusion for High
The relative error of the Filliben [Technometrics, 17, 111, 1975] approximation for uniform order statistic medians is calculated from the ratio of the error to
Concrete maturity, often indicated by its equivalent age, is determined by the interaction of the temperature-dependent exothermic hydration reactions and the
ISO Technical Committee TC 59, Building Construction, is an international standards committee dealing with general rules for performance requirements for
The consistency of measurements performed in various wind tunnels is of concern to both design engineers and code writers. This study makes an initial attempt
The National Institute of Standards and Technology (NIST) has been conducting research in crane automation since the mid 1980 s. A robotic crane (RoboCrane)
Walter J. Rossiter Jr, Blaza Toman, M Vangel, M E. McKnight, M Baghai Anaraki, A Signor, I Emenanjo, E Byrd
This paper summarizes the results a three-year study conducted to evaluate the reliability of field-portable ultrasonic extraction-anodic stripping voltammetry
The U.S.-Japan Joint Panel on Wind and Seismic Effects is now entering its 33rd year. The Panel was formed in 1969 under the auspices of the U.S.-Japan
Tinh Nguyen, G Xiaohong, M Giraud, Mark R. VanLandingham, Jonathan W. Martin
The surface and film/substrate interface properties of a coating system have a strong influence on its adhesion and durability. However, both the surface and
The earliest work in the United States on the development of portland cement standards was conducted by the American Society of Civil Engineers in the late
Linking field and laboratory exposure results and predicting the service life of a polymeric materials exposed in its intended service environment have been
This contribution is a chapter for a manual on petrographic analysis of concrete. It adds new material on the application of scanning electron microscopy to
This paper presents an improved method for the design of steel structures that can save material and energy embodied therein while maintaining wind-resisting
A recently developed capability allows the routine creation, from National Weather Service Automated Surface Observing System (ASOS) records, of separate sets
Emil Simiu, Fahim H. Sadek, S M. Diniz, Michael A. Riley, S Jang, L W. Lu
Following Irminger s 1894 aerodynamic tests, Flachsbart s pioneering boundary-layer wind tunnel experiments in 1932, and University of Western Ontario (UWO)
The 4SIGHT computer code facilitates the performance assessments (PA) of nuclear waste and decommissioning facilities that employ concrete as the principal
In designing a building that will perform reliably over a specified time, a designer needs a vast amount of information about the performance of the available
One of the recommendations of the National Construction Safety Team for the Federal Building and Fire Safety Investigation of the World Trade Center Disaster
There is a growing awareness of the benefits that could accrue from improving the technologies used by the Nation s $995 billion/year building and construction
Brancusi s Endless Column (T rgu-Jiu, Romania) is an interesting case study in bluff body aeroelasticity. It has been referred to as aeroelastically indifferent
A rigorous procedure that calculates wind-induced effects on tall buildings is presented. The method, an extension of Database-Assisted Design (DAD), uses sets
Modeling of the separation of spherical particles in field-flow fractionation under conditions spanning the normal to steric transition is studied and is