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Detection of defects in friction stir welding process is a challenging task since most of the defects are internal or subsurface. An attempt has been made to explore the methodologies based on temperature signal for possible detection of defects in friction stir welding process using different tool profiles. The presence of defect is affected by temperature diffusion and is better reflected by the...
An attempt has been made in this investigation to explore the possibility of quantifying the dynamic spectrum of signals in friction stir welding process using the concept of fractal dimension. A series of scan with a fixed span of time signals is characterized by computed fractal dimension. Difference observed in the computed fractal dimension for defective welding condition. The factual change in...
We describe a generic framework for determining and monitoring access rights derived from credential documents. Distributed authorization systems intended to support collaborative coalitions (such as trust management systems) typically incorporate mechanisms to both validate credentials, and to determine authorization. This conjunction of distinct functions increases complexity of both components...
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