The thecosomes are a group of planktonic pteropods with thin, 1 mm-sized aragonitic shells, which are known to possess a unique helical microstructure consisting of interlocking nanofibres. Here we ...
The Concrete Reinforcing Steel Institute (CRSI) has released a digital version of its Design Guide on the ACI 318 Building Code Requirements for Structural Concrete, a design guide based on the ACI ...
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