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Briefs: Software
Simulating Humans as Integral Parts of Spacecraft Missions
The Collaborative-Virtual Environment Simulation Tool (C-VEST) software was developed for use in a NASA project entitled "3-D Interactive Digital Virtual Human." The project is oriented toward the use of a comprehensive suite of advanced software tools in computational simulations for the...
Briefs: Software
Processing Raman Spectra of High-Pressure Hydrogen Flames
The Raman Code automates the analysis of laser-Raman- spectroscopy data for diagnosis of combustion at high pressure. On the basis of the theory of molecular spectroscopy, the software calculates the rovibrational and pure rotational Raman spectra of H2, O2, N2, and H2O in hydrogen/air...
Briefs: Software
Modular Aero-Propulsion System Simulation
The Modular Aero-Propulsion System Simulation (MAPSS) is a graphical simulation environment designed for the development of advanced control algorithms and rapid testing of these algorithms on a generic computational model of a turbofan engine and its control system. MAPSS is a nonlinear, non-real- time...
Briefs: Software
Generic Environment for Simulating Launch Operations
GEM-FLO (A Generic Simulation Environment for Modeling Future Launch Operations) is a computer program that facilitates creation of discrete event simulation models of ground processes in which reusable or expendable launch vehicles (RLVs) are prepared for flight. GEM-FLO includes a component,...
Briefs: Software
Infrastructure for Rapid Development of Java GUI Programs
The Java Application Shell (JAS) is a software framework that accelerates the development of Java graphical-user-interface (GUI) application programs by enabling the reuse of common, proven GUI elements, as distinguished from writing custom code for GUI elements. JAS is a software...
Briefs: Software
DCS-Neural-Network Program for Aircraft Control and Testing
A computer program implements a dynamic-cell-structure (DCS) artificial neural network that can perform such tasks as learning selected aerodynamic characteristics of an airplane from windtunnel test data and computing realtime stability and control derivatives of the airplane for use in...
Briefs: Mechanical & Fluid Systems
Large Deployable Reflectarray Antenna
A report discusses a 7-meter-diameter reflectarray antenna that has been conceived in a continuing effort to develop large reflectarray antennas to be deployed in outer space. Major underlying concepts were reported in three prior NASA Tech Briefs articles: "Inflatable Reflectarray Antennas" (NPO-20433), Vol....
Briefs: Mechanical & Fluid Systems
A proposed device would remove bubbles of gas from a stream of liquid (typically water), accumulate the gas, and periodically release the gas, in bulk, back into the stream. The device is intended...
Briefs: Electronics & Computers
Modular, Microprocessor-Controlled Flash Lighting System
A microprocessor- controlled lighting system generates brief, precisely timed, high- intensity flashes of light for scientific imaging at frame rates up to about 1 kHz. The system includes an array of light-emitting diodes (LEDs) that are driven in synchronism with an externally generated...
Briefs: Electronics & Computers
Highly Efficient Multilayer Thermoelectric Devices
Multilayer thermoelectric devices now at the prototype stage of development exhibit a combination of desirable characteristics, including high figures of merit and high performance/cost ratios. These devices are capable of producing temperature differences of the order of 50 K in operation at or...
Briefs: Electronics & Computers
A method has been proposed for extracting information on the rate of rotation of an aircraft, spacecraft, or other body from differential Doppler shifts of Global Positioning System...
Briefs: Electronics & Computers
A digital video camera system has been qualified for use in flight on the NASA supersonic F-15B Research Testbed aircraft. This system is capable of very-high-speed color digital...
Briefs: Software
Madsen Giersing, an Australian consulting engineering firm that specializes in marine engineering and construction solutions, was commissioned to design a new bulk liquids berth...
Briefs: Photonics/Optics
Whispering-gallery-mode (WGM) optical resonators of a type now under development are designed to support few well-defined waveguide modes. In the simplest case, a resonator of this type would support...
Briefs: Photonics/Optics
Electrically Tunable Terahertz Quantum-Cascade Lasers
Improved quantum-cascade lasers (QCLs) are being developed as electrically tunable sources of radiation in the far infrared spectral region, especially in the frequency range of 2 to 5 THz. (Heretofore, the wavelengths of QCLs have been adjusted by changing temperatures, but not by changing...
Briefs: Semiconductors & ICs
A system of electronic instrumentation, constituting the equivalent of a two-port vector network analyzer, has been developed for use in on-wafer measurement of key electrical characteristics...
Briefs: Semiconductors & ICs
PVM Enhancement for Beowulf Multiple-Processor Nodes
A recent version of the Parallel Virtual Machine (PVM) computer program has been enhanced to enable use of multiple processors in a single node of a Beowulf system (a cluster of personal computers that runs the Linux operating system). A previous version of PVM had been enhanced by addition of a...
Briefs: Semiconductors & ICs
Programs for Testing Processor-in-Memory Computing Systems
The Multithreaded Microbenchmarks for Processor-InMemory (PIM) Compilers, Simulators, and Hardware are computer programs arranged in a series for use in testing the performances of PIM computing systems, including compilers, simulators, and hardware. The programs at the beginning of the...
Briefs: Medical
Biomimetic/optical sensors have been proposed as means of real-time detection of bacteria in liquid samples through real-time detection of compounds secreted by the bacteria. Bacterial...
Briefs: Medical
Analysis of Membrane Lipids of Airborne Micro-Organisms
A method of characterization of airborne micro-organisms in a given location involves (1) large-volume filtration of air onto glass-fiber filters; (2) accelerated extraction of membrane lipids of the collected micro-organisms by use of pressurized hot liquid; and (3) identification and...
Briefs: Medical
A noninvasive, sensitive method of diagnosing certain pathological conditions of the human heart involves computational processing of digitized...
Briefs: Mechanical & Fluid Systems
A proposed data-fusion system, to be implemented mostly in software, would further process the digitized and preprocessed outputs of sensors in a turbofan engine to detect...
Briefs: Mechanical & Fluid Systems
Future nuclear-powered Ion-Propulsion- System-propelled spacecraft such as Jupiter Icy Moon Orbiter (JIMO) will carry more than 10,000 kg of xenon propellant. Typically, a small...
Briefs: Physical Sciences
Four methods of detection of bodies of water are under development as means to enable autonomous robotic ground vehicles to avoid water hazards when traversing off-road terrain. The...
Briefs: Information Technology
A new robust method of automated real-time diagnosis of faults in an aircraft engine or a similar complex system involves the use of a bank of Kalman filters. In order to be highly...
Briefs: Information Technology
Conflict-Aware Scheduling Algorithm
A conflict-aware scheduling algorithm is being developed to help automate the allocation of NASA's Deep Space Network (DSN) antennas and equipment that are used to communicate with interplanetary scientific spacecraft. The current approach for scheduling DSN ground resources seeks to provide an equitable...
Briefs: Materials
A liquid-chromatography technique has been developed for use in the quantitative analysis of urea (and of other nonvolatile organic compounds typically found with urea) dissolved in...
Briefs: Materials
A dry plasma process has been demonstrated to be useful for the selective modification of self-assembled monolayers (SAMs) of alkanethiolates. These SAMs are used, during the fabrication...
Briefs: Materials
Water-based pressure-sensitive paints (PSPs) have been invented as alternatives conventional organic- solvent-based pressure-sensitive paints, which are used primarily for indicating distributions of air...
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Blog: Energy
Batteries that Can Withstand the Cold
Quiz: Power
Blog: Communications
Microscopic Swimming Machines that Can Sense, Respond to Surroundings
Webcasts
On-Demand Webinars: Semiconductors & ICs
Advantages of Smart Power Distribution Unit Design for Automotive &...
Upcoming Webinars: Transportation
Quiet, Please: NVH Improvement Opportunities in the Early Design...
Upcoming Webinars: Sensors/Data Acquisition
From Spreadsheets to Insights: Fast Data Analysis Without Complex...
Upcoming Webinars: Aerospace
Cooling a New Generation of Aerospace and Defense Embedded...
Upcoming Webinars: Test & Measurement
Beyond AI-Copy-Paste Engineering: Advanced AI-Integration Success...
Upcoming Webinars: Energy
