Modeling & simulation research

News and Updates

A Billion Tiny Pendulums Could Detect the Universe’s Missing Mass

October 13, 2020

Researchers at the National Institute of Standards and Technology (NIST) and their colleagues have proposed a novel method for finding dark matter, the cosmos’s

Man with dark hair writing mathematical formulas on a whiteboard on a wall.

NIST Formula May Help 5G Wireless Networks Efficiently Share Communications Frequencies

May 26, 2020

Researchers at the National Institute of Standards and Technology (NIST) have developed a mathematical formula that, computer simulations suggest, could help 5G

Divide and Conquer: New Algorithm Examines Crime-Scene Bullets Segment by Segment

March 26, 2020

On the morning of March 22, 1915, residents of the small town of West Shelby, New York, awoke to a horrific scene. A woman clad only in a bloodied nightgown lay

Calibration of a Commercial Rheometer for Orthogonal Superposition Measurement

March 12, 2020

NIST researchers have addressed crucial calibration procedures for an advanced rheological technique that can make measurements on the structural dynamics of

Projects and Programs

Optical and Optoelectronic Materials Characterization

This project aims to develop rigorous measurements and methodology needed for determining optical and electrical properties of advanced materials that might be

Sub-Surface Elastic Depth-Profiling by Intermittent-Contact Resonance Atomic Force Microscopy

The Intermittent Contact Resonance AFM (ICR-AFM) technique aims to add 3D mechanical property mapping to the surface topographies generated during force

Modeling and Simulation of Nanofabrication (Archived)

Most manufacturing has historically been based on top-down fabrication and assembly. With rapid advances in nanotechnology, there is increasing interest in

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

We want to quantify the breakdown of geometrical optics when computing the throughput of optical systems for the purpose of calculating "diffraction corrections

Publications

Developing Cost Functions for Estimating Solar Photovoltaic System Installed Using Historical Data and OLS Regression

November 20, 2020

Author(s)

David H. Webb, Joshua D. Kneifel

Solar photovoltaics (PV) continues to increase in market share. Policy decisions and the nature of solar markets continue to shift; however, it is likely that

Analysis and Uncertainty Quantification of DNA Fluorescence Melt Data: Applications of Affine Transformations

October 15, 2020

Author(s)

Paul N. Patrone, Anthony J. Kearsley, Jacob M. Majikes, James A. Liddle

Rheology of Crystallizing LLDPE

October 8, 2020

Author(s)

Marat Andreev, David Nicholson, Anthony P. Kotula, Jonathan D. Moore, Jaap Den Doelder, Gregory C. Rutledge

Polymer crystallization occurs in many plastic manufacturing processes, from injection molding to film blowing. Linear low-density polyethylene (LLDPE) is one

Multi-Integral Representations for Associated Legendre and Ferrers Functions

September 25, 2020

Author(s)

Howard S. Cohl

We obtain antiderivatives and complex integral representations for associated Legendre functions and Ferrers functions (associated Legendre functions on-the-cut

Software

HVAC SIMulation PLUS other systems (HVACSIM+)

August 24, 2020

The first version of HVACSIM+, which stands for “HVAC SIMulation PLUS other systems”, was introduced by National Institute of Standards and Technology (NIST) in

Smart Investment Tool

June 15, 2020

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

VCCTL Software

(Return to Cement Hydration and Degradation Modeling Software) The Virtual Cement and Concrete Testing Laboratory (VCCTL) software provides a virtual

Tools and Instruments

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

Xiao Tang - 2016 Fellow of the American Physical Society

The criterion for election is exceptional contributions to the physics enterprise; e.g., outstanding physics research, important...