Briefs: Electronics & Computers
Photodiode Preamplifier for Preamplifier for Weak Signals

An improved preamplifier circuit has been designed for processing the output of an avalanche photodiode (APD) that is used in a high-resolution laser ranging system to detect laser pulses returning from a target. The improved circuit stands in contrast to prior such circuits in which the...

Briefs: Electronics & Computers
Advanced High-Definition Video Cameras

A product line of high-definition color video cameras, now under development, offers a superior combination of desirable characteristics, including high frame rates, high resolutions, low power consumption, and compactness. Several of the cameras feature a 3,840 × 2,160-pixel format with progressive...

Briefs: Semiconductors & ICs
Circuit for Full Charging of Series Lithium-Ion Cells

An advanced charger has been proposed for a battery that comprises several lithium-ion cells in series. The proposal is directed toward charging the cells in as nearly an optimum manner as possible despite unit-to-unit differences among the nominally identical cells.

Briefs: Semiconductors & ICs
Analog Nonvolatile Computer Memory Circuits

In nonvolatile random-access memory (RAM) circuits of a proposed type, digital data would be stored in analog form in ferroelectric field-effect transistors (FFETs). This type of memory circuit would offer advantages over prior volatile and nonvolatile types:

Briefs: Software
World Wind 3D Earth Viewing

World Wind allows users to zoom from satellite altitude down to any place on Earth, leveraging high-resolution LandSat imagery and SRTM (Shuttle Radar Topography Mission) elevation data to experience Earth in visually rich 3D. In addition to Earth, World Wind can also visualize other planets, and there are already...

Briefs: Software
JavaGenes Molecular Evolution

JavaGenes is a general-purpose, evolutionary software system written in Java. It implements several versions of a genetic algorithm, simulated annealing, stochastic hill climbing, and other search techniques. This software has been used to evolve molecules, atomic force field parameters, digital circuits, Earth...

Briefs: Materials
Accounting for Uncertainties in Strengths of SiC MEMS Parts

A methodology has been devised for accounting for uncertainties in the strengths of silicon carbide structural components of microelectromechanical systems (MEMS). The methodology enables prediction of the probabilistic strengths of complexly shaped MEMS parts using data from tests of...

Briefs: Materials
Lithium Dinitramide as an Additive in Lithium Power Cells

Lithium dinitramide, LiN(NO2)2 has shown promise as an additive to nonaqueous electrolytes in rechargeable and non-rechargeable lithium-ion-based electrochemical power cells. Such non-aqueous electrolytes consist of lithium salts dissolved in mixtures of organic...

Briefs: Materials

Ion-conducting polymers that are hybrids of organic and inorganic moieties and that are suitable for forming into solid electrolyte membranes have been invented in an effort to improve upon the...

Briefs: Materials

MoO3 has shown promise as a cathode material that can extend the upper limit of operating temperature of rechargeable lithium thin-film electrochemical cells. Cells of...

Who's Who: Aerospace

In a crash, keeping the occupants alive and uninjured is paramount. In order to study the dynamics of an impact, military and general aviation...


NextEngine, Santa Monica, CA, offers the Desktop 3D Scanner, a full-color multi-laser scanner that scans complex shapes for CAD and 3D design applications on the desktop. About the size of a cereal box, the scanner...

Briefs: Mechanical & Fluid Systems
Sierra Design Engineering, Mount Aukum, California BUB Enterprises, Grass Valley, California; ALGOR, Inc., Pittsburgh, Pennsylvania

A streamliner motorcycle designed and built...

Briefs: Manufacturing & Prototyping

A counterrotating-shoulder mechanism has been proposed as an alternative to the mechanism and fixtures used in conventional friction stir welding. The mechanism would internally...

Briefs: Manufacturing & Prototyping

A method of detecting mechanical failure induced by variation in temperature at an adhesive bond between two materials that have different coefficients of thermal expansion (CTEs)...

Briefs: Medical

Antibodies that bind to preselected regions of the urokinase molecule have been developed. These antibodies can be used to measure small quantities of each of three molecular forms of urokinase...

Briefs: Medical
Understanding and Counteracting Fatigue in Flight Crews

The materials included in the collection of documents describe the research of the NASA Ames Fatigue Countermeasures Group (FCG), which examines the extent to which fatigue, sleep loss, and circadian disruption affect flight-crew performance. The group was formed in 1980 — in response to...

Application Briefs: Photonics/Optics
SLP-330 Laser Scanning Probe Laser Design
Minneapolis, MN

The loss of the Space Shuttle Columbia because...

Michael Kaplan
Director of Engineering
Adobe Acrobat
Adobe Systems Inc.
San Jose, CA

When I started graduate studies in 3D computer graphics in 1978, dinosaurs roamed the Earth. I still remember my...

Articles: Manufacturing & Prototyping
Emhart Teknologies Presents “Create the Future” 2006 Design Contest Winners

Creating the future is about change, creativity, and risk - the core building blocks that foster innovation.

For the past five years, Emhart Teknologies has partnered with NASA Tech Briefs in challenging the engineering community through our “Create the...

Articles: Motion Control
Winner of a hybrid automobile or $20,000

Designed by:David A. Torrey, Ph.D., P.E.

Advanced Energy Conversion LLC

Malta, NY

There is tremendous...

Articles: Manufacturing & Prototyping
Winner of a Panasonic 42" plasma TV

Designed by:

Buck Albritton
Ashland, VA
Articles: Manufacturing & Prototyping
Merit Prize Winners, “Create the Future” 2006 Design Contest
Parallel-Plate Motorcycle Frame

Martin O’Toole, Revolution Motorcycles, Doylestown, PA

The concept of the parallel-plate framing system is to eliminate the welded tubular frame. The components are made using 3-axis CNC milling, waterjet, and laser-cutting machines. By...

Articles: Aerospace
Meet the Judges, “Create the Future” 2006 Design Contest
William Brosey, Section Manager,
BWXT Y-12, Oak Ridge, TN Joe Buford, Mfg. Engineer,
Boeing Satellite Development Center,
El Segundo, CA
Articles: Manufacturing & Prototyping

In today’s competitive marketplace, manufacturers need suppliers who not only deliver the parts required to build a product, but those who deliver support and consultation on how best to...

Briefs: Physical Sciences
Balloon for Long-Duration, High-Altitude Flight at Venus

A document describes a 5.5-m-diameter, helium-filled balloon designed for carrying a scientific payload having a mass of 44 kg for at least six days at an altitude of about 55 km in the atmosphere of Venus. The requirement for floating at nearly constant altitude dictates the choice of a...

Briefs: Electronics & Computers
Wide-Temperature-Range Integrated Operational Amplifier

A document discusses a silicon-oninsulator (SOI) complementary metal oxide/ semiconductor (CMOS) integrated- circuit operational amplifier to be replicated and incorporated into sensor and actuator systems of Mars- explorer robots. This amplifier is designed to function at a supply...

Tech Needs
Environmentally Friendly Solvents

A specialty chemical company is seeking innovative green, renewable raw materials, products, and processes for replacement of existing non-environmentally friendly solvents while not compromising the performance or significantly increasing the costs. The solutions should be biodegradable, low/non- VOC, low...