The present invention relates to a noise attenuating window comprised of two panes of glass separated by a spacer tube. The spacer tube contains T-shaped acoustic resonator capable of targeting a single mode or multiple-mode to be attenuated.
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This invention provides double-skin tubular structural members having fiber-reinforced polymer outer tubes, steel or otherwise generally metallic inner tubes and generally a bound aggregate such as concrete in between the tubes.
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A novel method is disclosed for the preparation of an aqueous polyacrylate modified polyurethane dispersion. The preparation method includes three main steps: (a) preparation of polyacrylates polymer or copolymer without using cationic surfactants; (b) preparation of polyurethane prepolymer with car.....
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Traditional methods for resistivity measurements of concrete have to use two plate electrodes at opposite sides of a prism specimen. The major drawback of such a method is that the electrodes can be easily detached from the specimen due to shrinkage of concrete. Thus the measurement of resistivity.....
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The Safe nCosy Blanket System is an improved safety bedding system for a cot comprising a multipurpose safety blanket for infants made up of a size adjustable blanket, an anchor fastenable to an anchor point on the cot for holding the blanket in situ in the cot and attachment means for releasably at.....
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