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A new method for silencing internal machinery generated torpedo noise is proposed. This innovative solution to the problem has the added capabilites of: controlling on a wavevector basis the acoustic signal radiated by the torpedo and simulation of boundary layer excitation on a torpedo hull. The proposed device thus offers the capability to not only suppress internally generated noise, but flow n ...

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The research will investigate a uniquely configured optical to tactile converter which packages both the optical camera and a miniaturized vibrotactile display into a compact handheld configuration. The increased haptic awareness afforded to the user by this configuration is expected to improve the uniformity of text presentation to the sensing fingertip and may improve the performance and utility ...

This research will investigate a blind mobility aid which uses kinesthetic feedback to intuitively communicate to the user the range and texture of surfaces in the extended environment. The handheld device will contain an infrared optical ranging module with the range output. The sensitivity and directivity of the device will allow users to feel textural aspects as small as one centimeter and spat ...

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AT THE PRESENT TIME, ALL MATURITY SORTING OF FRUITS AND VEGETABLES, SUCH AS APPLES, PEACHES ANDTOMATOES, IS ACCOMPLISHED EITHER BY HAND, BY COLOR OR BY THE USE OF THE MAGNESS-TAYLOR . EACH OF THESE TECHNIQUES HAVE MAJOR DISADVANTAGES IN THE HIGH-SPEED MATURITY GRADING OF FRUITS AND VEGETABLES. THE ANNUAL VALUE OF THE THREE NAMED FOOD CROPS ALONE IS IN EXCESS OF ONE BILLION DOLLARS, AND THE OPPORTU ...

There are no commercial amplifiers that can operate at temperatures above 125 degrees Celsius. We will combine two comparable wide bandgap semiconducting materials to make electronic amplifiers and switches that operate at high temperatures (at least 500 degrees Celsius). These devices can be controlled remotely by a light beam. Hence wireless coupling to a room temperature macroprocessor is possi ...

THIS PROJECT PROPOSES TO EXPLORE THE USE OF A WIDE BANDGAP SEMICONDUCTOR TO MAKE DEVICES CAPABLE OF OPERATING AT TEMPERATURES OF AT LEAST 500 0C. PN JUNCTIONS WILL BW FABRICATED. THE MAJOR THRUST WILL BE THE STUDY OF ELECTRODE TECHNOLOGY TO MAKE OHMIC CONTACTS THAT ARE STABLE AT HIGH TEMPERATURE AND IN THE PRESENCE OF AN ELECTRIC BIAS. THE APPROPRIATE METALLIZATION MUST RESIST BOTH THERMAL DIFFUSI ...

WE PROPOSE TO DEVELOP AND STUDY A NEW MANUFACTURING TECHNOLOGY FOR THE EPITAXIAL GROWTH OF MULTILAYERS OF III-NITRIDES SEMICONDUCTORS (GaN AND AlGaN) AT TEMPERATURES SUBSTANTIALLY LOWER THAN PRESENTLY ACHIEVED. THE TECHNIQUE IS BASED ON THE ION BEAM DEPOSITION SYSTEM WHERE THE IONS ARE GENERATED BY AN ELECTRON CYCLOTRON RESONANCE (ECR) MICROWAVE PLASMA. THE ENERGY OF THE IONS INCIDENT ON THE SUBST ...