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.

Mathematics & Statistics

Modeling & simulation research

News and Updates

Blog Posts

Zach Grey poses outdoors with wind turbines in the background.

Riding the Wind: How Applied Geometry and Artificial Intelligence Can Help Us Win the Renewable Energy Race

Read more
Jeffrey Fong poses smiling in front of a railing overlooking a concrete dam.

My Journey From Designing Dams to Helping Structures Live Their Longest Lives

Read more
Zach Levine in his kitchen wearing an orange and white striped apron and chef's hat

Minding your Peas and Carrots: Please Try This at Home

Read more

Events

Projects and Programs

Breathalyzer

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
Spectroscopic ellipsometry measurement of a 2D monolayer and the optical property for such a thin layer.

Optical and Optoelectronic Materials Characterization

Ongoing
Today's electronics have reached a point where sheer computation power has combined form and function as the key driver of large consumer markets. The demand for portable and pervasive electronics with greater functionality promises significant changes over the next decades in how society interacts

Modeling and Simulation of Nanofabrication (Archived)

Completed
While self-assembly is still in its relative infancy with respect to practical use, with much additional research required to reach maturity, the more widely utilized top-down methods will continue to require advances and modifications to improve current nanomanufacturing techniques. This modeling
Figure 1. Class of optical setup considered in this work. The aperture can be limiting (as shown in this case) or nonlimiting.

Diffraction effects in radiometry

Ongoing
Essentially, classical radiometry relies on geometrical optics (to relate source radiance), geometrical aspects of an optical layout, and the irradiance at the detector. One considers the propagation of radiation from points on the surface of the source to points on the surface of the detector. In

Publications

Graphic Approximation of Integer Sequences

Author(s)
Brian D. Cloteaux
A variety of network modeling problems begin by generating a degree sequence drawn from a given probability distribution. If the randomly generated sequence is

Software

Calculator

Smart Investment Tool

This tool calculates metrics for investment analysis documented in NIST Advanced manufacturing Series 200-5. It calculates net present value, internal rate of

Network Modeling Software

This software is a set of NetworkX additions for the creation of graphs to model networks. Graphicality Testing -- This is a set of routines for testing if a

Tools and Instruments

Large Aperture Scanner

Large Aperture Scanner

The Large Aperture Scanner (LAS) scans a radar transceiver over a 5 meter by 20 meter aperture. Image reconstruction techniques enable a three-dimensional

Awards