Physical Sciences

Briefs: Photonics/Optics

Adaptive Deblurring of Noisy Images

An algorithm for adaptive deblurring of images has been designed to be less adversely affected by image noise than are prior deblurring algorithms. The need for this or another noise-tolerant deblurring...

Briefs: RF & Microwave Electronics

Implementing a GPS Waveform Under the SCA

A continuing development effort focuses on implementation of a Global Positioning System (GPS) waveform under the Software Communications Architecture (SCA). [As used within the special technological...

Briefs: Physical Sciences

Nanodevices Based on Actin-Filament End-Tracking Motors

In a continuing research project, nanoscale actuators based on actin-filament end- tracking motors have been synthesized and characterized. It is envisioned that such actuators will...

Briefs: Physical Sciences

Arcing and Vibration Tests of High-Power Patch Antennas

Electric-breakdown and vibration tests were performed on one-patch and two-patch versions of a prototype of a patch antenna designed to radiate a continuous- wave or pulsed signal in...

Briefs: RF & Microwave Electronics

Antenna Electronically Steered Using MEMS Phase Shifters

An experimental phased-array microwave antenna assembly includes an array of eight patch antenna elements connected to Microelectromechanical System (MEMS) phase shifters, by means of...

Briefs: Physical Sciences

Advances Toward Development of "Smart Dust" Biosensors

Progress has been made toward meeting several technical challenges in a continuing effort to develop “smart dust” sensors for remote detection of chemical and biological agents....

Briefs: Physical Sciences

Structural Composite Batteries

A continuing program of research and development is devoted to the design, fabrication, and testing of polymeric composite- material devices that are multifunctional in the sense that they both store...

Briefs: Physical Sciences

Mechanical Aspects of Structural Composite Batteries

In furtherance of the development described in the immediately preceding article, an experimental study focusing on mechanical aspects of structural composite batteries was performed. In...

Briefs: Physical Sciences

Measuring Skin Friction in Complex Flows That Include Shocks

A methodology for measuring skin friction (also known as wall shear) in complex flows typical of those inside supersonic-combustion ramjet (scramjet) engines has been developed....

Briefs: Physical Sciences

Miniaturized GPS Controlled-Reception-Pattern Antenna Array

Aminiaturized Global Positioning System (GPS) antenna array is being developed for use on aircraft on which the room available for installation of this or any other equipment is...

Briefs: Physical Sciences

System for Imaging Turbulent Combustion Flows

Asystem of scientific instrumentation and data-processing equipment has been assembled for research and education in turbulence, mixing, and chemical reactions (especially combustion) in...

Briefs: Physical Sciences

Novel Methods of Detecting Buried Explosive Devices

Several novel methods of detecting landmines and other buried explosive devices have been proposed and are subjects of continuing research. The use of trained dogs has been shown to be an...

Briefs: Physical Sciences

All-Dielectric, Non-Electronic Radio-Receiver Front Ends

All-dielectric, non-electronic, photonicassisted front ends are being developed as alternatives to traditional metal antennas and the associated metal connections and input electronic...

Briefs: Physical Sciences

Liquid-Crystal-Particle Thermometry and Velocimetry System

A three-dimensional (3D) defocusing liquid-crystal-particle thermometry and velocimetry (3DDLCPTV) system has been designed and constructed (but not yet operated) for use in...

Briefs: Test & Measurement

Measuring Corrosion-Related Properties of Coupled Metals

Amethod and apparatus have been conceived for using electrochemical impedance spectroscopy (EIS) for determining rates of corrosion of coupled metals. EIS has been used heretofore for...

Briefs: Physical Sciences

Scaling of Flight Tests of Unmanned Air Vehicles

A program of research has addressed a methodology of scaling of flight tests of unmanned air vehicles (UAVs) intended primarily for military use in observing and/or attacking targets on the...

Briefs: Physical Sciences

Solid-State Viscosity Sensors For Military and Aerospace Applications

Embedded OEM application markets such as the military and aerospace industries are experiencing a growing demand for sensors that provide instantaneous and continuous...