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Micromachined Chemical/Biological Agent Sensor Arrays Based on Combinatorial Libraries: The Development of an Electronic Tongue
This site highlights the capabilities of a sensor array structure. Smart sensors which are capable of discriminating between different analytes, toxins, and bacteria have become more important in a range of applications. These include military, environmental, medicinal, food processing/evaluation, health and safety, remote sensing, and chemical processing. A new type of sensor array has been developed that functions in a manner analogous to an "electronic tongue". Methods have also been developed in which a combination of state-of-the-art micromachining, novel photochemical sensing schemes, molecular engineering of receptor sites, and pattern recognition protocols can be used to detect a variety of important biological and chemical agents.
DERA Signal Processing Group
Sensor array systems have significant advantages over conventional single sensor systems, including beam agility, diversity, reliability and multi-role capability. The DERA Signal Processing Group carries out research into advanced DSP algorithms and architectures which address: adaptive beamforming for rejection of interference and clutter, adaptive multi-channel equalisation to combat fading and multipath, estimation and reception of multiple simultaneous signals, and improved angular resolution. If individual sensor outputs can be directly sampled, intelligent signal processing can offer these characteristics.
The well presented and interesting site also contains information about adaptive beamforming, broad-band adaptive beamforming, super-resolution, direction-finding and spectral estimation, algorithms and architectures, high order signal analysis, element digitised radar, communications array processing, adaptive array processing toolset (AdAPT), and applications.
This page is an abstract submitted for the Johns Hopkins University, Applied Physics Laboratory 3rd Symposium on Research and Development. Entitled "Demonstration of Navy SonoBuoy Dipole Processing Techniques for Land-Based Army Microphone Sensors", it introduces the work carried out with an Army microphone array. The microphone array is part of a multistatic field of arrays designed to provide the Army with a means to perform localisation, tracking, and identification of tanks, trucks, and troops etc. The method has been verified using field data of recorded tanks travelling around the sensor. The Symposium was held at the Kossiakoff Center on 7-8 November, 1995.
Communications Research Group
Part of the School of Engineering at the University of Hull, the Communications Research Group homepage is still under development. So far it only gives details of Dr Alan Tennant's Research Group's activities on Volume Arrays and Acoustic Array Antennas. Information is well presented, in a clear and simple manner, along with a useful toolbar and relevant links.
CAIP Microphone Array Research
The Center for Computer Aids for Industrial Productivity (CAIP Center) at Rutgers University, researches high quality sound capture as part of a larger interest in multimedia-related research. The current research has a particular focus on active and passive microphone arrays, as it enables the capture of high quality audio waveforms from remote sound sources, under adverse acoustic conditions. Arrays also allow the tracking and recording of moving human talkers without requiring the use of a cumbersome tethered microphone.
This site contains plenty of information, with many publications available to download. The Huge Microphone Array (HMA), a real-time 512-microphone array system, is also presented.
Mobile & Portable Radio Research Group (MPRG), Virginia Tech Information Systems Center
The MPRG homepage is well presented and easy to navigate. There are links to other areas of research, including the Virginia Tech. Antenna Group. The page above web address gives details of a simulation testbed written in Matlab, to compare the performances of some adaptive algorithms. The two blind algorithms (do not require a training signal) are discussed. These are Multi-target Least Squares Constant Modulus Algorithm (MT-LSCMA) - which can adapt an antenna array to separate and capture multiple communications signals, and Beam-space Constant Modulus Algorithm (BSCMA) a beam-space based adaptive algorithm.
As part of a comprehensive personal homepage, this site gives a good introduction to sonar array theory. It discusses aperture theory, phased arrays (including 2-element arrays, N-element array, two-dimensional arrays, arrays of arbitrary arrangement, aperture shading, beam steering, and noise cancellation with nulls) and acoustic arrays.
The Official Website of Jaguar Cars
This website is suitably befitting for a company renowned for style, performance, and quality. A huge amount of information is available on this site, and all of it spectacularly presented. There are Virtual Reality Jaguars, not what you might expect but very nice anyway! The Jaguar Collection, fashion accessories, sports equipment, luggage, bags, and keyrings etc., the Picture and Video Gallery, which is well worth a visit, and a lot more. Information is available on the current range of cars, Jaguar dealers, safety and security, design and development, Jaguar archives, Jaguar news, advertising, sovereign magazine, a guest book from which you can send electronic postcards, approved used cars, and financial services. There are also links to a complete Website dedicated to the S-type Jaguar.