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Sensors/Data Acquisition

Applying Reconfigurable Computing to Acoustic Sensors

There is growing interest in the U.S. Armed Forces in the development of microsensor systems that are easily deployed and that support reconnaissance, surveillance, and target acquisition...

Articles
Sensors/Data Acquisition

Digital Light Control Simplifies Focal Plane Array Testing and Image Sensor Production

Characterization of the performance of image sensors and image sensor systems is critical to success in many defense and security applications. From image...

Tech Transfer Reports

Fiber-Optic Technology Could Benefit Computer and Electronics Test Equipment

An innovative technology capable of moving data faster within high-end computers may soon benefit the multi-billion-dollar electronics test equipment market. Using...

Briefs
Physical Sciences

Nanostructured Ferromagnetic-Wire/Insulator Composites

A research and development effort now in progress is focused on nano-structured ferromagnetic- wire/insulator composite materials to be used as the magnetic-core materials of sensors for...

Briefs
Materials

Barium Ferrite Materials for Microwave Circulators

Barium ferrite thick disks have been fabricated for incorporation in self-biased microwave devices. The process uses barium ferrite nanopowder mixed with epoxy. The mix is placed on alumina substrates to fabricate 500 μm thick disks of BaM to achieve good magnetic properties such as magnetic...

Briefs
Materials

Lubrication Considerations for Military Equipment

Military equipment is subject to increasingly harsh environmental conditions and performance requirements. Simultaneously, engineers and equipment operators are demanding longer service life and less maintenance. The proper approach to lubrication is critical to minimizing equipment failures and...

Briefs
Materials

Thermal Characterization of Thin Films for MEMS Applications

Dielectric thin films play a very important role in the development of microelectromechanical systems (MEMS). These dielectric materials often are used as insulating layers in...

Briefs
Electronics & Computers

Optical Microwave-Signal-Channelization Technique Analyzed

In a recent study, a proposed technique for optical frequency-band channelization of a microwave signal or other wide-band radio signal in a receiver was analyzed and compared with...

Briefs
Electronics & Computers

High-Cycle Life Testing of RF MEMS Switches

The electromechanical, RF, and charging properties of an "air-gap" capacitive switch enable it to be utilized in high-cycle life testing. Monitoring both high-speed and low-speed switching...

Briefs
Photonics/Optics

Reduced Power Laser Designation Systems

This work contributes to the Micropulse Laser Designation (MPLD) project to develop a six-pound eye-safe micro-pulse laser system to locate, identify, range, mark, and designate stationary and moving targets. MPLD uses laser pulses of much lower energy and higher repetition rates than in existing laser...

Briefs
Photonics/Optics

Continuous-Wave Laser Diodes Based on a Novel InGaAsNSb Material System

Laser sources operating in the spectral region from 2 to 3.5 μm are in demand for ultra-sensitive laser spectroscopy, medical diagnostics, home security, industrial process monitoring, infrared countermeasures, and optical wireless communications. Currently, solid-state...

Briefs
Photonics/Optics

Photon Counting Chirped Amplitude Modulation Ladar

This work is a follow-up to prior efforts to develop a method using Geiger-mode avalanche photodiode (GM-APD) photon counting detectors in chirped amplitude modulation (AM) ladar receivers...

Briefs
Mechanical & Fluid Systems

SparkJet Actuators for Controlling Flows

SparkJet actuators are under investigation as means of controlling flows — especially supersonic and hypersonic flows. In one important class of potential applications, SparkJet actuators would...

Briefs
Mechanical & Fluid Systems

Stability of Rotors Supported by Hydrodynamic Film Bearings

The document, "Hydrodynamic Fluid Film Bearings and Their Effect on the Stability of Rotating Machinery" represents a lecture in a series "Design and Analysis of High-Speed Pumps," held in 2006 under the auspices of the North Atlantic Treaty Organization. The document introduces the...

Briefs
Mechanical & Fluid Systems

Prototype Rocket Engine for a Nanosat Launch Vehicle

A paper discusses a prototype rocket engine for a suborbital Reusable Nanosat Launch Vehicle (RNLV). The engine must operate with thrust levels from 3,000 to 5,000 lbf. The engine is comprised of three major subassemblies: the injector, igniter, and the combustion chamber nozzle. Propellants...

Briefs
Manufacturing & Prototyping

Improvements in Manufacturing BMI/Fiber Composites Using AFP

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...

Briefs
Manufacturing & Prototyping

Patterning of Polycrystalline Bi2Te3 Thin Films on Silicon

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

Briefs
Medical

Tactical Medical Coordination System

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...

Briefs
Physical Sciences

Robot Vision System for Precise Object Retrieval in Unmanned Systems

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,...