ABSTRACT.
The ultrasonic testing of concrete structures has posed many problems. Conventional methods such as pulse echo and pitch catch are of limited use due to its composition, aggregates will cause scattering and multiple reflections. Alternative ultrasonic methods have been recently investigated that examine the shape of the waveform as it traverses through a complex material, the idea being not to located a single defect but to determine the overall mechanical properties within a certain region. In damaged materials, particularly ones t ....etc

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I Dushmant kumar setha , mechanical engg. student of indus college of engineering (bput university, odisha). sir i want a seminer report on ultersonic machining process..so kindly give a report in this topic. thus i will thankful to u. please send to my email ([email protected]). ....etc

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Laser Micro-Patterning by Means of Optical Fibers with Micro-grinded Lens End Faces



Introduction

Nano-patterning of polymer surface has found a wide range of applications including biotechnology, where holes in the size of hundreds nm can influence the growth and differentiation of relatively large living cells . Instead of the e-beam patterning technique used in the Ref. 1, we ap-plied direct writing by laser-light. In our previous papers , we have demonstrated that th ....etc

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Demand for the research and development of the micro-manufacturing technologies is being fueled by the ever-increasing trend towards miniaturization over a wide spectrum of disciplines and industries. Recent technological advancement in the defense, biomedical, telecom-munications, consumer electronics have spearheaded the need for micromanufacturing technology, which is now beginning to find application in the automotive and aerospace industries due to the economic potential of the micro-factory paradigm. Micro-scale mechanical manufacturing p ....etc

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On the macro scale, feedback control is routinely applied to improve performance and enable new tasks in complex and uncertain systems operating in noisy environments. Our lab has focused on applying feedback control ideas to systems on the micro scale. Here we show how control methods can improve existing performance in the UCLA lab-on-a-chip electrowetting system and can create entirely new capabilities in our 'micro fluidic tweezers' cell steering devices.In the Electro-Wetting-On-Dielectric (EWOD) system developed at UCLA by CJ Kim, a grid ....etc

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A new precision finishing process called MRAFF has been developed, which is basically a combination of Abrasive Flow Machining (AFM) and Magnetoreological Finishing (MRF), for nano-finishing parts even with a complicated geometry for a wide range of Industrial applications. This article deals with the theoretical investigations about the mechanism of the MRAFF process to study the effects of several process parameters. In the present work we have tried to analyze the flow of the medium through the installation by finite difference method assumi ....etc

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