Briefs: Mechanical & Fluid Systems
Radial-Electric-Field Piezoelectric Diaphragm Pumps

In a recently invented class of piezoelectric diaphragm pumps, the electrode patterns on the piezoelectric diaphragms are configured so that the electric fields in the diaphragms have...

Briefs: Mechanical & Fluid Systems
Ejector-Enhanced, Pulsed, Pressure-Gain Combustor

An experimental combination of an off-the-shelf valved pulsejet combustor and an aerodynamically optimized ejector has shown promise as a prototype of improved combustors for gas turbine...

Briefs: Mechanical & Fluid Systems
“Zero-Mass” Noninvasive Pressure Transducers

Extremely lightweight, compact, non-invasive, rugged, relatively inexpensive strain- gauge transducers have been developed for use in measuring pressures of fluids in tubes. These gauges were...

A modified scheme for electron-beam (E-beam) writing used in the fabrication of convex or concave diffraction gratings makes it possible to suppress the ghost diffraction heretofore...

A mathematical model, and software to implement the model, have been devised to enable numerical simulation of the transport of electric charge in, and the resulting electrical performance...

Compounds having compositions of Mo3Sb7–xTex (where x = 1.5 or 1.6) have been investigated as candidate thermoelectric materials. These compounds...

In a proposed alternative to previous approaches to making hot-shoe contacts to the legs of thermoelectric devices, one relies on differential thermal expansion to increase contact...

Several techniques for manipulating neutral atoms (more precisely, ultracold clouds of neutral atoms) in chip-based magnetic traps and atomic waveguides have been demonstrated. Such...

Briefs: Information Technology
Physical Principle for Generation of Randomness

A physical principle (more precisely, a principle that incorporates mathematical models used in physics) has been conceived as the basis of a method of generating randomness in Monte Carlo simulations. The principle eliminates the need for conventional random-number generators.

A computational method and system based on a hybrid of an artificial neural network (NN) and a support vector machine (SVM) (see figure) has been conceived as a means of maximizing or...

Briefs: Information Technology
DSN Beowulf Cluster-Based VLBI Correlator

The NASA Deep Space Network (DSN) requires a broadband VLBI (very long baseline interferometry) correlator to process data routinely taken as part of the VLBI source Catalogue Maintenance and...

A recently invented speech-recognition method applies to words that are articulated by means of the tongue and throat muscles but are otherwise not voiced or, at most, are spoken sotto...

Briefs: Information Technology
Associative Memory Using Quantum-Inspired Resonance

In this innovation, the retrieval of stored items from an exponentially large, unsorted database is performed by quantum-inspired resonance using polynomial resources due to quantum-like superposition effect. The model is represented by a modified Madelung equation in which the quantum...

Briefs: Physical Sciences
Criteria for Modeling in LES of Multicomponent Fuel Flow

A report presents a study addressing the question of which large-eddy simulation (LES) equations are appropriate for modeling the flow of evaporating drops of a multicomponent liquid in a gas (e.g., a spray of kerosene or diesel fuel in air). The LES equations are obtained from the direct...

Briefs: Mechanical & Fluid Systems
Computerized Machine for Cutting Space Shuttle Thermal Tiles

A report presents the concept of a machine aboard the space shuttle that would cut oversized thermal-tile blanks to precise sizes and shapes needed to replace tiles that were damaged or lost during ascent to orbit. The machine would include a computer-controlled jigsaw enclosed in a...

Briefs: Mechanical & Fluid Systems
Orbiting Depot and Reusable Lander for Lunar Transportation

A document describes a conceptual transportation system that would support exploratory visits by humans to locations dispersed across the surface of the Moon and provide transport of humans and cargo to sustain one or more permanent Lunar outpost. The system architecture reflects...

Briefs: Electronics & Computers
FPGA-Based Networked Phasemeter for a Heterodyne Interferometer

A document discusses a component of a laser metrology system designed to measure displacements along the line of sight with precision on the order of a tenth the diameter of an atom. This component, the phasemeter, measures the relative phase of two electrical signals and transfers...

Briefs: Electronics & Computers
Aquarius Digital Processing Unit

Three documents provide information on a digital processing unit (DPU) for the planned Aquarius mission, in which a radiometer aboard a spacecraft orbiting Earth is to measure radiometric temperatures from which data on sea-surface salinity are to be deduced. The DPU is the interface between the radiometer and an...

The figure schematically depicts some alternative designs of proposed compact, lightweight optoelectronic microscopes that would contain no lenses and would generate magnified video images of...

An analog electronic camera that is part of a metrology system measures the varying direction to a light-emitting diode that serves as a bright point target. In the original application for which...

A method of polarimetric imaging, now undergoing development, involves the use of two photoelastic modulators in series, driven at equal amplitude but at different frequencies. The net...

The figure depicts a proposed wide-angle lens that would be especially well suited for an electronic camera in which the focal plane is occupied by an image sensor that has small...

Briefs: Physical Sciences
Modal Filters for Infrared Interferometry

Modal filters in the ≈10-μm spectral range have been implemented as planar dielectric waveguides in infrared interferometric applications such as searching for Earth-like planets. When looking for a small, dim object (“Earth”) in close proximity to a large, bright object (“Sun”), the...

Podcasts
Nicholas Johnson, Chief Scientist and Program Manager for NASA’s Orbital Debris Program Office, Johnson Space Flight Center

Nicholas Johnson is Chief Scientist and Program Manager for NASA’s Orbital Debris Program Office. In July 2008 he was awarded the Department of Defense Joint Meritorious Civilian Service Award for his contribution to...

Articles: Electronics & Computers
Patient Monitoring Using Capacitive Sensors

Capacitive sensors can be used to measure many different physical parameters that are important when monitoring the health of patients. In particular, the technical advances made by sensor...

Articles: Electronics & Computers
Designing Flexible Printed Circuit Boards

General purpose flexible circuit boards are those with electronic components that can be bent to fit in tight spaces. Most are just one or two layers thick and are meant for "flex to install"...

Articles: Electronics & Computers
Software Development for Low Power Designs

The increasing emphasis on green technologies has focused more attention on low power design. Microcontroller vendors are responding by increasing their offerings of ultra low power devices that...

Application Briefs: Electronics & Computers
New Small Form Factor Storage Standard Targets Embedded Systems

To achieve small size, low power consumption and fast time to market requirements, embedded systems designers often look to chipsets found in cell phone handsets or mobile...

Products: Electronics & Computers
Audio Enrichment Technology

ARC International (San Jose, CA), has introduced the Virtual Bass™ audio enrichment technology that delivers a deep rich bass response on existing speakers or headphones, eliminating the need to add...

Videos