Boulder

ACMD Seminar: The Concept of Effective Resistance in a Directed Network

Fern Hunt Scientist Emeritus, Applied & Computational Mathematics Division, NIST Tuesday, May 20, 2025, 3:00-4:00 PM ET (1:00-2:00 PM MT) In...

NIST USNO 2024 Archive

UTC (USNO) - UTC (NIST) The United States Naval Observatory (USNO) and the National Institute of Standards and Technology (NIST) make...

NIST UTC 2024 Archive

UTC - UTC (NIST) The deviation of UTC(NIST) from UTC has been less than +/-100 ns since July 6, 1994. The table below shows values of UTC -...

2025 - Presidential Early Career Award for Scientists and Engineers---Ann Debay

Dr. Ann Debay of the NIST Material Measurement Laboratory has had remarkable successes in measuring the atomic makeup of advanced materials

ACMD Seminar: Accurate, provable, and fast nonlinear tomographic reconstruction

Sara Fridovich-Keil Assistant Professor, Electrical and Computer Engineering, Georgia Tech Tuesday, April 22, 2025, 3:00-4:00 PM ET (1:00-2...

Interfacial thermodynamics of 2D-materials-based nanofluidic systems

Controlled aqueous ion flow through nanoporous membranes is a critical function of protein ion channels, which ubiquitously control salinity in living cells

FireLiDAR

Light Detection and Ranging (LiDAR) is a powerful tool to precisely measure and track the surface geometry of solid objects. However, in...

Recommended Reference Materials for Phase Equilibrium Studies (IUPAC 2011-037-2-100)

The objective is to provide lists of recommended reference materials (primarily organics and common gases) with critically evaluated property values for phase

ThermoML-2017 Revision of an XML based IUPAC Standard for Thermodynamic Property Data (IUPAC 2017-016-3-100)

It is intended to update the XML-based dictionary for storage and exchange of thermophysical and thermochemical data based on fundamental principles of

screenshot of the published report's title and abstract

Good Reporting Practice for Thermophysical and Thermochemical Property Measurements (IUPAC 2019-013-1-100)

Thermophysical and thermochemical properties are frequently measured during scientific research funded by public money. While the primary goals may be different

Supporting Scientific Reviewing of Thermophysical and Thermochemical Research Publications (IUPAC 2023-008-1-024)

The principles of Good Reporting Practice have been stated and justified in the IUPAC project "Good Reporting Practice for Thermophysical and Thermochemical

UV chirped pulse electro-optic dual comb generation

Dual electro-optic frequency comb (DOFC) methods are being developed to enhance detection sensitivity and speed for gas sensing in ultraviolet (UV) region. The

THz chirped-pulse electro-optic dual comb generation

Dual electro-optic frequency comb (DOFC) methods are being developed to enhance detection sensitivity and speed for (bio)molecular sensing in THz region. Phase

2025 Berthold Leibinger Zukunftspreis Prize - Jun Ye

The award acknowledges Ye's groundbreaking work in optical clocks and frequency metrology, which has significantly advanced precision

A first-ever comparison between National Metrology Institutes in the kW-power regime

March 5, 2025

NIST has continuously positioned itself at the forefront of high-power laser calibrations for over three decades [1]. To better meet needs of the manufacturing

Management Resources Leadership

Del Brockett Del Brockett is the Associate Director for Management Resources for the U.S. Department of Commerce's National Institute of...

2025 SPIE Fellow - Jeeseong Hwang

For distinguished contributions in optics, photonics, and imaging.

2025 Optica Fellow - David Plusquellic

For pioneering advances in electro-optic frequency comb technology from ultraviolet to terahertz frequencies for spectroscopy, molecular

About Us

Management Resources is committed to providing comprehensive institutional support services that enable NIST and its organizational units to...

Sources and Detectors group ensures U. S. Military gas mask performance

February 26, 2025

“To survive and win…we must leverage ingenuity and technology to develop comprehensive solutions” -U. S. Army CBRN capability development update, 2024 CBRN

Calibration leaders and researchers in the NIST Sources and Detectors Group support U.S. Military Aviation with laser-targeting system calibrations

February 21, 2025

“Air Power alone does not guarantee America’s security, but I believe it best exploits the nation’s greatest asset – our technical skill” -Gen. Hoyt Vandenberg

Metrology of Purity and Contaminants in Solid Materials

Chips manufacturers use a variety of high-purity solid materials, such as silicon, germanium, copper, gold, silver, GeSi, AlGaN, etc., in their processes

Gas Flow and Properties: Standards and Models for Flow Metering Semiconductor Gases at Flows from 10 μL/min to 1 L/min

Numerous gases are used in the production of semiconductor chips, and the accurate metering of these gases into the process chamber is critical for maximizing

ACMD Seminar: Modeling AI Supply Chains: How Increased Outsourcing and Complexity in AI/ML Development Introduces New Considerations for Machine Learning

Aspen Hopkins Ph.D. Candidate, Dept. of Electrical Engineering & Computer Science, Massachusetts Institute of Technology Tuesday, Feb. 25...

NIST Time and Frequency July 29-31, 2025 NIST Boulder

2025 NIST Time and Frequency Seminar

Tue, Jul 29 - Thu, Jul 31 2025

NIST Time and Frequency Division's annual seminar covers precision clocks and oscillators, atomic frequency standards

ACMD Seminar: Calibration and Verification of Expensive Chaotic Models; Short Runs, Ensembles, and Approximate Gradients

Expensive chaotic models, like those used in weather simulation, present a unique set of challenges for tasks like validation and calibration. Often, they are computationally expensive, highly sensitive to parameters, and are written in languages that don't support approaches like automatic differentiation. This talk will provide an overview of approaches that employ ultra-short runs and ensembles to address these challenges with a specific focus on methods to detect unwanted changes in large model codes.