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.
Richard M. Silver, Bryan M. Barnes, Hui Zhou, Nien F. Zhang, Ronald G. Dixson
This paper introduces recent advances in scatterfield microscopy using improved normalization and fitting procedures. Reduced measurement uncertainties are
The calculation of natural gas viscosity has been implemented many different ways including the use of constants. Different methods of calculating natural gas
Critical flow venturis (CFVs) can be used to measure flow under transient pressure, temperature, and flow conditions with k=2 uncertainties of 0.4 % or less
We report progress in testing a dynamic gravimetric standard using both steady and unsteady water flows. For steady flows in the range 10 kg/s to 60 kg/s, the
Measurements of the flow and the energy content of natural gas rely on equations of state to compute four thermodynamic properties: 1) compressibility factor; 2
The manufacturing companies are facing the challenging dilemma on how to achieve better quality products while reducing manufacturing costs and define the
This paper recommends practices for development and deployment of modeling, simulation and analysis (MS&A) tools for homeland security applications. The set of
This paper proposes a framework for application of system dynamics modeling to sustainable manufacturing. Sustainable manufacturing involves interaction of
Substantial global climate changes due to global warming and the growing rate resource depletion have compelled several researchers to focus their research in
Antonio Izquierdo Manzanares, Nada T. Golmie, Richard A. Rouil
In this paper we study the performance of the authentication process in media independent handovers, and consider the impact of using IEEE 802.21 link triggers
Thomas A. Germer, Heather J. Patrick, Richard M. Silver, Benjamin Bunday
This article describes how an uncertainty analysis may be performed on a scatterometry measurement. A method is outlined for propagating uncertainties through a
Chiara F. Ferraris, Zughuo Li, Mona Mohseni, Nicholas Franson
Oil is the most used standard material for the calibration of rheometers. Other products are used to calibrate flow devices, i.e., the flow table is calibrated
Charles S. Tarrio, Robert E. Vest, Thomas B. Lucatorto, R. Caudillo
Optics in EUVL exposure tools are known to suffer reflectivity degradation, mostly from the buildup of carbon. The sources of this carbon have been difficult to
Fiber optic networks are an attractive means for the remote distribution of highly stable frequencies from optical clocks. The highest performance is achieved
At NIST, said Dr. Rochford, "we are very broad, but we focus like a laser on measurement science." NIST also helps develop standards and promote technology. He
Modeling and simulation (M&S) techniques are increasingly being used to solve problems and aid decision making in many different fields. It is particularly
A number of modeling, simulation and analysis (MSA) efforts have evolved to support homeland security initiatives. Various organizations involved in homeland
This paper focuses on efforts by the Mass and Force Group at the National Institute of Standards and Technology (NIST) to enhance the data taking operations of
Gale A. Holmes, Eun S. Park, Jae Hyun Kim, Walter G. McDonough, John R. Sieber, Haruki Kobayashi, Michael A. Riley, Kirk D. Rice
The use of high performance fibers (such as, poly[(benzo-[1,2-d;5,4-d ]-benzoxazole-2,6-diyl)-1,4-phenylene]1 (PBO), ultra-high molecular weight polyethylene2
Jeffrey T. Fong, Roland deWit, Pedro V. Marcal, James J. Filliben, Nathanael A. Heckert, Stephen R. Gosselin
In a 2007 paper entitled "Application of Failure Event Data to Benchmark Probabilistic Fracture Mechanics (PFM) Computer Codes" (Simonen, F. A., Gosselin, S. R
Over the last thirty years, much research has been done on the development and application of inservice inspection (ISI) and failure event databases for
The understanding of shape and size of the human head and faces is vital for design of facial wear products, such as respirators, helmets, eyeglasses and for
We are developing a device for measuring the heat capacity of candidate absorber materials for gamma-ray microcalorimeters with the goal of finding materials
Donald L. Hunston, Kar T. Tan, Sushil K. Satija, Christopher C. White, Bryan D. Vogt, Cyril Clerici
It is well-known that moisture will attack many adhesive joints. A particularly interesting feature is the observation that when the moisture level in certain
The CBC-MAC, or cipher block chaining message authentication code, is a well-known method to generate message authentication codes. Unfortunately, it is not
In opinion-finding, the retrieval system is tasked with re- trieving not just relevant documents, but those that also express an opinion towards the query
A computational approach to analyzing respirator fit is demonstrated using geometries generated by laser scanning, mechanical drawings, and CAD files. Three fit
Metrology frames have proven to be an excellent tool for improving the accuracy of machine tools, and because of the small sizes and travels involved, they may