Skip to main content
U.S. flag

An official website of the United States government

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.

Projects/Programs

Topic Area
Displaying 1426 - 1450 of 1644

Standard Reference Materials for Hexavalent Chromium in Contaminated Soil

Completed
During the last century, chromate and dichromate chemical production facilities processed considerable amounts of chromite ore for industrial manufacturing purposes. The waste material from these operations called chromite ore processing residue (COPR) was disposed of in waste sites across the

Standard Reference Materials: Standardization of 232U (SRM 4324c)

Ongoing
The certified massic activity for 232U was obtained by 4παβ LS spectrometry with two commercial LS counters. The beta detection efficiencies for the 232U daughters were calculated using the MICELLE2 code for the CIEMAT/NIST efficiency tracing (CNET) method with composition-matched LS cocktails of a

Standard Reference Materials: Standardization of 243Am (SRM 4332f)

Ongoing
The certified massic activity for 243Am was obtained by 4παβ LS spectrometry with two commercial LS counters. The beta detection efficiencies for the 243Am daughter ( 239Np) were calculated using the CN2003 code for the CIEMAT/NIST efficiency tracing (CNET) method with composition-matched LS

Standard Reference Materials: Standardization of 239Pu (SRM 4330d)

Ongoing
The certified massic activity for 239Pu was obtained by 4πα liquid scintillation (LS) spectrometry with two commercial LS counters. Confirmatory measurements were performed by LS counting comparative measurements against SRM 4330d, which was also standardized in 2009 by 4pa liquid scintillation (LS)

Standard Reference Measurements

Ongoing
State-of-the art property measurements have been the hallmark of the Fluid Properties Group for more than four decades. Many of these measurements have been carried out on one-of-a-kind instruments developed at NIST. In some cases the older instruments are still among the very best of their kind

Standard Solution SRMs Provide Traceability for Millions of Measurements

Ongoing
Literally millions of measurements of elemental composition are performed each year worldwide. The vast majority of these measurements depend upon reference materials for establishing traceability of results to the SI. Leveraged through commercial CRM producers, the NIST SRM 3100 series provides an

Standards

Ongoing
Standards for Optical Based Standoff Detection NIST is researching methods for creating explosive threat materials standards relevant to optical detection technologies (e.g. that result in samples with particle morphologies similar to those found in explosive threat devices). This includes both

Standards Development to Ensure Reliable Breath Analysis in the Field

Ongoing
Numerous volatile organic compounds (VOCs) have been identified in human breath. These compounds can be produced by the body or by organisms in the body (e.g., bacteria or viruses) and provide a non-invasive window into human health. Inexpensive point-of-care devices are being developed to diagnose

Standards for Metagenomics

Ongoing
Metagenomics is a powerful technology combining high-throughput (a.k.a. “next-generation”) sequencing with advanced bioinformatics to identify and quantify mixtures of organisms in a sample. Metagenomics workflows consist of 4 main steps: Sample collection: location, amount, storage, etc. Extraction

Standards to Support Biological Detection in the Field

Ongoing
NIST is working in partnership with the Department of Homeland Security Science and Technology Directorate (DHS S&T) to develop methods, guidance, standards, and reference materials to support and improve our Nation's ability to detect and respond to suspected biothreat incidents. Specific

Standards to Support Biothreat Detection

Ongoing
Since 9/11 and the subsequent anthrax attacks in 2001, suspicious white powder incidents continue to occur within the US, often requiring Federal law enforcement response. Suspect samples are sent to public health laboratories for confirmatory evaluation, which can take hours to weeks to receive

Standards & Testing - Healthcare

Ongoing
Please continue to the Healthcare - Standards & Testing page. The site will provide information about the key health IT testing initiatives underway. It provides an overview of the Health IT Standards Testing Infrastructure as well as educational material on conformance testing, access to Meaningful

State Estimation for Uncertain Power Systems

Completed
The deployment of renewable resources in distributed grid systems poses a set of new challenges mainly due to their variability and dependency on climate parameters, which can have a major impact on the system parameters that are needed to measure power flow and state estimation. More precisely, a

Statistical Characterization of High-Speed Oscilloscopes and Photodiodes

Ongoing
As part of a interdisciplinary team including staff from the Optoelectronics and the Radio Frequency Technology Divisions of EEEL, SED staff are developing statistical methods and associated software for calibration of high-speed digital sampling oscilloscopes and characterizing the impulse response

Statistical Education Project

Ongoing
The NIST laboratory has over 1300 scientists and engineers formulating investigations, planning experiments, collecting data, analyzing data, and deriving scientific/ engineering conclusions. All of these scientific-method components may benefit from both the general and NIST-specific statistical

Statistical Friction Ridge Analysis (SFRA)

Ongoing
Introduction Friction ridge analysis in crime scene investigation is one of the crucial forensic methods to find the suspects and victims of crime and solve cases. Latent fingerprints—the friction ridge patterns from fingertips left at crime scenes and photographed or lifted from the surfaces—are

Statistical methods for MGI metrology

Ongoing
We focus on research and development of statistical methods to enable new measurement science and metrology relevant to MGI. In particular, we illustrate our methods for examples from near-field scanning probe microwave microscopy (NSSM) for characterization, development, and modeling of novel

Statistical Methods in Millimeter-Wave Wireless Metrology

Ongoing
DESCRIPTION: One of the measurement solutions is the use of reverberation chambers for free-field testing of wireless devices. A reverberation chamber is an environment for electromagnetic compatibility testing and other investigations. Quantities of interest that have been studied for wireless

Statistical Methods for Quantitative Imaging

Ongoing
In this project, we have gained valuable experience in the emerging area of developing metrology support for medical image decision making, and we have focused mainly in the area of high resolution CT imaging for lung nodules,using both phantoms and clinical data, in the context of RSNA's QIBA

Statistical Methods in Waveform Metrology

Ongoing
One of the methods developed is the timebase correction procedure for waveforms. A waveform is a representation of a signal varies with time. The most familiar waveform is the sine wave. Waveform measurements are required throughout the optical communications, computer, wireless communications

Statistical modeling of images of electronic materials

Ongoing
Correcting NSSM images of materials for topographic backgrounds is a major challenge. Based on the Atomic Force Microscopy (AFM) topography images, we predict the signature of topographic variations to any NSSM image. The difference between the observed NSSM image and this prediction is our estimate
Was this page helpful?