Tech Briefs

A program now in progress is dedicated to making improvements in automated fiber placement (AFP) for the manufacture of advanced composite-material (matrix/fiber) structural...

Experiments in patterning of thin films of polycrystalline bismuth telluride (Bi2Te3) on silicon substrates have been performed. Bi2Te3 is...

The term "tactical medical coordination system" (TacMedCS) denotes any of several prototype electronic systems for tracking patients in a scenario that may involve multiple instances of treatment by...

Briefs: Medical
Remote Blood Pressure Waveform Sensing

This non-contact, non-invasive blood pressure apparatus continuously measures and monitors blood pressure using a laser Doppler vibrometer to create waveforms. The laser-based system may be utilized to continuously provide highly detailed information about the timing characteristics of the blood pressure...

Automating large-scale material handling systems that involve picking up or retrieving items via cranes or robot arms can yield big benefits, particularly in harsh or...

Briefs: Physical Sciences
Advanced Concepts for Space Access

A paper summarizes commonly proposed advanced launch concepts, including both concepts that employ propellant and propellant-less concepts. A wide range of advanced launch concepts have been proposed in an effort to revolutionize space access through either a significant reduction in launch costs or significant...

Briefs: Information Technology
Explicitly Timed Authorization Logic

A document describes explicitly timed authorization logic (nicknamed "η-logic"). In prior authorization logics, it is, variously, impossible or difficult to handle time explicitly; express security policies that involve complex, time-dependent relationships; or reason accurately about time. By enabling...

Briefs: Electronics & Computers
Emerging Power and Energy Technologies for Portable Electronics

A report discusses data obtained for the Navy's Special Operations Command (SOCOM), which seeks a portable power/energy source capable of providing sufficient power and energy for complex missions at a minimal weight penalty. The report focuses on the specific energy of systems,...

A method for providing a time code for multiple streams of simultaneously received data has been developed in order to allow reconstruction of the data after asynchronous transfer. It is often...

The Flowslide, developed by Royal Boon Edam Group Holding BV, is a combination of a revolving door and curved sliding panels, installed at Charles de Gaulle Airport, Paris. The...

Briefs: Physical Sciences
Digital-Image Data Acquisition System for Turbulent Mixing and Combustion

An equipment and instrumentation system for high-speed digital image data acquisition and processing includes components for Planar Laser Induced Fluorescence (PLIF), flame-speed, and ignition and extinction measurements of laminar flames at variable pressure; tracking...

Briefs: Software
Tool for Processing and Displaying Genomics Data in Spreadsheets

ChromaBlast is a computer program that facilitates and accelerates processing and display of data by use of Microsoft Excel or other spreadsheet software that affords similar capabilities. The development of ChromaBlast was prompted by a need for improved means of analyzing and...

Briefs: Electronics & Computers
Magnetic Memory Devices for Embedded Computing

A program of research has been dedicated to the development of magnetic memory devices than can be incorporated into complementary metal oxide/semiconductor (CMOS) integrated circuits, wherein...

A prototype hybrid micro-electro- mechanically tunable optical filter (MEM-TF) based partly on an electrostatic-actuation principle has been built and tested as an essential component...

Silicon nanowires have been investigated as alternatives to the graphite heretofore widely used as an anode material in rechargeable lithium-ion power cells. The theoretical...

Briefs: Materials
Composites Containing Nanostructured Shape-Memory Alloys

A continuing program of research is devoted to understanding composite materials that include nanostructured shape-memory alloy (SMA) constituents and to developing methods of fabricating components from such materials. This research is intended to improve the utilization of SMAs in...

Several advances have been made in research in the art of tailoring polymeric films to be, variously, (1) much more effective as barriers to diffusion of liquids and gases than they...

Briefs: Physical Sciences
Perspective on Research in Laser Propulsion

A document summarizes the history of research on laser propulsion, starting with the first publication of the laser-propulsion concept in the year 1969, proceeding through studies of laser propulsion within the broader context of advanced propulsion systems in general, and culminating in...

Briefs: Physical Sciences
Some Advances in Understanding of Environmental Fatigue

A research program has yielded advances in understanding of numerous aspects of environmental crack propagation in aerospace aluminum alloys. From one perspective, the objective of this program was to quantitatively establish governing crack-tip-mechanics conditions and damage mechanisms...

An experimental study of the mechanical behavior of cracked aluminum specimens repaired with composite-material patches has yielded findings that may eventually contribute to the...

Military planners are aggressively developing network-centric warfare platforms that use wireless communications as a force multiplier. The...

A system for noncontact measurement and analysis of vibrations of an electronic circuit board or a similar lightweight, nominally flat, rectangular object has been developed. This...

Tests have been performed in an effort to gain understanding of electrical and mechanical properties of silver-coated nylon fibers subjected to stresses and strains and exposed to...

The two-transmission method is an improved method of determining, from microwave measurements, the complex permeability and complex permittivity of a sample of a material typified...

An apparatus for in-plane biaxial tension/compression and in-plane shear testing of fabrics, other flexible sheet materials, or relatively rigid thin plate materials has been invented....

A five-year program comprising several coordinated research efforts was devoted to increasing understanding and developing capabilities for computational modeling of the effects of...

Near-field light lenses for focusing beams of light and beams of atoms to spots having a width of no more than several nanometers are undergoing development. There are numerous...

Progress has been made on several fronts in a continuing program of research oriented toward the development of real-time algorithms, and computer and control systems that utilize...

Electrochromic devices that exhibited adjustable infrared emissivity were developed in a research program that was part of a larger effort to develop adaptive infrared camouflage....

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