Statistical analysis

News and Updates

A close-up of a virus particle shows spikes protruding from the particle's surface and blobby sugars that cling to the spikes.

New NIST Method Can Better Identify Sneaky Sugars on Viruses’ Spiky Weapons

September 28, 2023

A better picture of the sugars can increase our understanding of how humans get infected by the virus behind COVID-19 and other pathogens.

Man wearing safety glasses leans toward a tabletop optical laser setup.

Spotlight: Meet a Mentor for Summer Undergraduates: NIST Quantum Physicist Krister Shalm

January 23, 2023

Quantum physicist Krister Shalm has a few spots in his laboratory for motivated undergrads. Do you know any STEM-centric college students who might be

Where Once Were Black Boxes, NIST’s New LANTERN Illuminates

June 22, 2022

Researchers at the National Institute of Standards and Technology (NIST) have developed a new statistical tool that they have used to predict protein function.

Events

Clipart of Person smoking Cannabis and images of cars

POSTPONED: Building a Path Forward for Meaningful Cannabis Breathalyzer Realization

Wed, Jun 18 - Thu, Jun 19 2025

We are bringing together participants from government, forensic laboratories, industry, academia, law enforcement

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

Projects and Programs

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

Uncertainty Estimation in Interlaboratory Studies

Ongoing

DESCRIPTION: Data sets consisting of multivariate samples occur increasingly often in applications in particular in in interlaboratory studies known as Key Comparisons in which the key comparison reference value (KCRV) is to be determined. The vector samples, being independent realizations of an

Radiative Decay of the Neutron

Ongoing

When a neutron decays by its radiative decay (RDK) mode, it produces a photon with a energy spectrum predicted by Quantum Electrodynamics. These RDK photons deposit energy in scintillators which produce voltage pulses in Avalanche Photo Diodes. We are developing nonlinear calibration models to

A Comparison of WD-EPMA Heterogeneity Testing Procedures

Ongoing

X-ray stage mapping (XSM) can be used to determine the extent of heterogeneity on the micron scale though it is more time consuming and not as accurate as the more rigorous NIST random-point (RP) testing procedure. The objective of this work is to demonstrate the advantage of the latter procedure

Publications

Value assignment and uncertainty evaluation for certified reference gas mixtures

September 9, 2024

Author(s)

Christina Cecelski, Jennifer Carney, Antonio Possolo

The procedures used to assign values to certified reference gas mixtures and to evaluate their associated uncertainties, which are described in ISO 6143, and

Pyramid Learning Based Part-to-Part Consistency Analysis in Laser Powder Bed Fusion

August 20, 2024

Author(s)

Erfan Ziad, Feng Ju, Zhuo Yang, Yan Lu

With the rapid growth of the manufacturing industry, laserbased metal additive manufacturing, such as laser powder bed fusion, has the potential to usher in a

Benford's law in atomic spectra and opacity databases

April 21, 2024

Author(s)

Yuri Ralchenko, Jean-Christophe Pain

The intriguing law of anomalous numbers, also named Benford's law, states that the significant digits of data follow a logarithmic distribution favoring the

Improving the TENOR of Labeling: Re-evaluating Topic Models for Content Analysis

March 23, 2024

Author(s)

Zongxia Li, Andrew Mao, Jordan Boyd-Graber, Daniel Stephens, Emily Walpole, Alden A. Dima, Juan Fung

Topic models are a popular tool for understanding text collections, but their evaluation has been a point of contention. Automated evaluation metrics such as

Statistical analysis

News and Updates

New NIST Method Can Better Identify Sneaky Sugars on Viruses’ Spiky Weapons

Spotlight: Meet a Mentor for Summer Undergraduates: NIST Quantum Physicist Krister Shalm

Where Once Were Black Boxes, NIST’s New LANTERN Illuminates

Events

POSTPONED: Building a Path Forward for Meaningful Cannabis Breathalyzer Realization

2025 NIST Time and Frequency Seminar

Projects and Programs

Standards Development to Ensure Reliable Breath Analysis in the Field

Uncertainty Estimation in Interlaboratory Studies

Radiative Decay of the Neutron

A Comparison of WD-EPMA Heterogeneity Testing Procedures

Publications

Value assignment and uncertainty evaluation for certified reference gas mixtures

Pyramid Learning Based Part-to-Part Consistency Analysis in Laser Powder Bed Fusion

Benford's law in atomic spectra and opacity databases

Improving the TENOR of Labeling: Re-evaluating Topic Models for Content Analysis

Software

Smart Investment Tool

Cost Assessment Tool for Sustainable Manufacturing (CATS)

Extreme Winds and Wind Effects on Structures