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This study reports effects of aspect ratio of test specimens on the stress-strain and stress-relaxation behaviors of polydimethylsiloxane (PDMS) and PDMS composites comprising 5 vol % of micrometer sized Cu powders, Cu(p). PDMS and PDMS-Cu(p) composites of aspect ratio ranging from 0.1 to 0.4 were cyclically loaded in compression at a strain rate of 1.0 × 10−3 s−1. Irrespective of the aspect ratio,...
This work reports the effects of strain rate on mechanical behavior of polydimethylsiloxane (PDMS)-based composites, prepared through inclusion of either micrometer or nanometer sized Cu particles into PDMS matrix. Pure PDMS and 5 vol % Cu-PDMS composites were cyclically loaded to a strain of 30% at a fixed strain rate, ranging from 1.0 × 10−3 to 5.0 × 10−1 s−1, for several loading-unloading cycles...
This paper reports a rapid microwave biosensor to check for Escherichia coli contamination in water samples, which can thereafter be extended for testing of other microbes as well. The sensor is a 3×3 array of polystyrene cylinders 8 of which are filled with poly vinyl chloride solid cylinders with the centre hollow cylinder holding the sample to be investigated. The sensor takes only 4–5 minutes...
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