Keyword: Mathematical models

Articles: Software

As new concepts need to be investigated, and a wide range of operating conditions has to be considered, the design of new products and processes must push the limits of...

Briefs: Aerospace
Separation Assurance Framework for ACES Simulation

National Airspace (NAS)-wide simulations provide modeling to emulate tens of thousands of flights for full days of traffic in the U.S. They allow system-level research to be conducted for the simulated airspace, and are currently being used by NASA, FAA, and industry to study interactions,...

Briefs: Aerospace
Orion Guidance, Navigation, and Control Flight Software

The Orion Spacecraft is NASA’s vehicle for manned exploration outside of low Earth orbit. At the center of the Guidance, Navigation & Control (GN&C) subsystem is the GN&C Flight Software (FSW) that executes on the Vehicle Management Computers (VMCs). This software receives...

Briefs: Aerospace
Multi-Fidelity Simulator (MFS)

Many next-generation air traffic algorithms may be formed by learning algorithms or dynamic programming techniques. These techniques form their solutions through iterative methods where the efficacy of a proposed solution needs to be evaluated for every round of iteration. In complex air traffic scenarios, often...

Briefs: Software
Efficient Two-Dimensional Solution Methods for the Navier-Stokes Equations

ARC2D is a computational fluid dynamics (CFD) program for two-dimensional airfoil and simply connected geometries. The program uses implicit finite-difference techniques to solve two-dimensional Euler equations and Navier-Stokes equations. It is based on the Beam and...

Briefs: Software
An Upwind Parabolized Navier-Stokes Solver (UPS) for Supersonic and Hypersonic Flow Simulation, Version 6.1

The simulation of high-speed flow involves unique challenges such as the treatment of strong flow gradients associated with shock waves and expansion fans, as well as the modeling, at hypersonic speeds, of air chemistry effects. However,...

Briefs: Software
Pegasus 5.2 Software for Automated Pre-Processing of Overset CFD Grids

Pegasus software is used as a pre-processor for overset-grid Computational Fluid Dynamics (CFD) simulations. It provides the hole-cutting and connectivity information between structured overset grids. The main features of the software include automated hole-cutting...

Briefs: Software
Software Suite for Identifying Suspicious Individuals

It can be very useful to know about activities among individuals; for example, which individuals are associated with other individuals? When two or more individuals get together, is there an intended purpose? Who are the leaders or important individuals of a group? What is the organizational...

Briefs: Software

The Automated Impacts Routing (AIR) software is advanced route finding technology for air and ground vehicles. The software provides users the ability to find optimized paths through...

Briefs: Software
Python Interface to Dual-Pol Radar Algorithms (DualPol)

This object-oriented Python module facilitates precipitation retrievals (e.g., hydrometeor type, precipitation rate, precipitation mass, particle size distribution) from polarimetric radar data. It leverages existing open-source radar software packages to perform all-in-one retrievals that...

Briefs: Software

Software-Defined Networking (SDN) usually requires network administrators to be skilled in programming languages such as C++, Python, or Ruby. Many IT operators tasked with...

Briefs: Test & Measurement

The Container Screening Device (CSD) is a portable, benchtop measurement system for real-time sealed-container inspection, and content (liquid/ material) classification and discrimination. The technology uses...

Briefs: Photonics/Optics

When women undergo lumpectomies to remove breast cancer, doctors try to remove all the cancerous tissue while conserving as much of the healthy breast tissue as possible. But currently there's no...

Articles: Software

Between 1985 and 1987, a radiation therapy device called the Therac-25 was involved in at least six incidents in which the device delivered massive overdoses of radiation. The patients...

Briefs: Software
PLOT3D 4.1

PLOT3D is an interactive graphics program designed to help scientists visualize computational fluid dynamics (CFD) grids and solutions. Today, supercomputers and CFD algorithms can provide scientists with simulations of such highly complex phenomena that obtaining an understanding of the simulations has become a major problem. Tools...

Briefs: Mechanical & Fluid Systems

Researchers at NASA's Armstrong Flight Research Center have developed a new technology to reduce inaccuracies in force/haptic feedback devices and systems. Used at NASA in aircraft...

Briefs: Imaging

Researchers use fluorescent imaging to locate proteins and other molecules in cells and tissues by tagging the molecules with dyes that glow under certain kinds of light — the...

Articles: Sensors/Data Acquisition

The U.S. Army uses wired and wireless systems to monitor real-time performance and safe operating limits of vehicles and aircraft, but no comparable systems exist for soldiers. New wearable technologies...

Articles: Imaging

Alens is cylindrical. It captures light in a circular plane for collection onto a rectangular digital sensor plane. This collection of photons is then transformed into electricity by...

Briefs: Test & Measurement
Decoupled Ranging and Orientation Inversions Enable Linear and Fast Long-Range Non-Line-of-Sight Positioning

The wireless radio positioning or radiolocation problem is of great importance in society today. Existing radiolocation systems such as the Global Positioning System (GPS), Radio-Frequency Identification (RFID) systems, and Ultra...

Facility Focus: Research Lab

In 1928, physics professor Ernest O. Lawrence left his faculty position at Yale University for a job at the University of California's Berkeley campus. While at Berkeley, Lawrence invented a unique...

Articles: Motion Control

Adding vision to a collaborative robot can open a world of possibilities for automation applications. With a vision system, a robot can inspect parts, check specific features of a part,...

Briefs: Robotics, Automation & Control

Researchers at NASA's Johnson Space Center (JSC), in collaboration with General Motors and Oceaneering, have designed a state-of-the-art, highly dexterous, humanoid robot: Robonaut 2 (R2)....

Briefs: Software
AUTONOMIE Automotive System Design Software

AUTONOMIE is a MATLAB-based software environment and framework for automotive control system design, simulation, and analysis. It simulates subsystems, systems, or an entire vehicle, and predicts and analyzes fuel efficiency and performance. The software performs analyses and tests for virtual...

Briefs: Software
iOrca Code Release

The iOrca outlier detection algorithm is based on the K-nearest neighbors approach. It calculates the distances across the dataset to determine if data points are near or far away from their set of neighbors. If a point has an unusually large distance to its neighbors, it is considered an outlier and of interest to the user....

Briefs: Software
Representation and Analysis of System Behavior Using Monotonic Signals

NASA has developed a new method for analyzing complex system behavior that also may be viewed as a type of data visualization and decision support tool. Large complex control systems may have thousands or even millions of sensors, each providing some type of signal that...

Briefs: Communications
GPS Satellite Geometry Analysis Tool (GPSGEM)

The purpose of the GPS Satellite Geometry Analysis Tool (GPSGEM) is to evaluate GPS satellite geometry for a given Earth-fixed location or for a provided trajectory. The tool will generate a listing of all satellites in view, the best satellite combination defined by the most optimum Geometric...

Briefs: Sensors/Data Acquisition

The invention developed is a piezoelectric stimulus-response quantification-based gravimeter (PEG). The PEG takes a completely innovative approach towards utilization of the...

Briefs: Sensors/Data Acquisition

Research by the University of Chicago provides scientists looking at single molecules or into deep space a more accurate way to analyze imaging data captured by microscopes, telescopes, and other...

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