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Polymer coatings and films have been disclosed that are photochemically processed for producing safer paints and coatings for a wider range of applications. View this technology at: http://link.abpi.net/l.php?20070102A3

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Mine Detection



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Current Attractions

Embedded Technology magazine features board-level electronics and COTS solutions for design engineers, as well as a variety of product offerings. The January issue of Embedded Technology contains a feature story on “Sensor Interface Design Demystified.” In this article, Dr. Kevin A. Shaw, director of business at Sensor Platforms Inc. (San Jose, CA) discusses, in light of the growth of MEMS (mircoelectromechanical systems), the considerations needed to be taken in sensor interface design. The designer must take into account smaller signals and application in order to develop the proper sensor, and the pit-falls involved. This article covers some of the basics of sensor interface design and gives an overview to the challenges and trade-offs of the possible approaches.

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Advances in Measurement of Skin Friction in Airflow

This system implements a combination of established experimental techniques and advanced image processing. The surface interferometric skin-friction (SISF) measurement system is an instrument for determining the distribution of surface shear stress (skin friction) on a wind-tunnel model. The SISF system utilizes the established oil-film interference method, along with advanced image-data-processing techniques and mathematical models that express the relationship between interferograms and skin friction, to determine the distribution of skin friction over an observed region of the surface of a model during a single wind-tunnel test.

Posted in: Test & Measurement, Briefs, TSP

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Improved Apparatus for Testing Monoball Bearings

Automated tests can be performed over wide ranges of conditions. A desk-sized apparatus for testing monoball bearings and their lubricants offers advantages, relative to prior such apparatuses, of (1) a greater degree of automation and (2) capability of operation under wider and more realistic ranges of test conditions. The ranges of attainable test conditions include load from 100 to >50,000 lb (445 to >2.22 × 105 N), resisting torque up to 30,000 lbin. (≈3,390 N-m), oscillating rotation through an angle as large as 280°, and oscillation frequency from 0 to 6 Hz. With addition of some components and without major modification of the apparatus, it is also possible to perform tests under environmental conditions that include temperature from –320 to 1,000 °F (–196 to +538 °C), relative humidity from 0 to 100 percent, and either air at ambient pressure, high vacuum, or an atmosphere of monatomic oxygen.

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Instrument for Aircraft-Icing and Cloud-Physics Measurements

Data on cloud water content are deduced from hot-wire power a levels. The figure shows a compact, rugged, simple sensor head that is part of an instrumentation system for making measurements to characterize the severity of aircraft-icing conditions and/or to perform research on cloud physics. The quantities that are calculated from measurement data acquired by this system and that are used to quantify the severity of icing conditions include sizes of cloud water drops, cloud liquid water content (LWC),cloud ice water content (IWC), and cloud total water content (TWC).

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Apparatus for Hot Impact Testing of Material Specimens

It is not necessary to cool and reheat the furnace between tests. An apparatus for positioning and holding material specimens is a major subsystem of a system for impact testing of the specimens at temperatures up to 1,500 °C. This apparatus and the rest of the system are designed especially for hot impact testing of advanced ceramics, composites, and coating materials.

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