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Directional expansion of blast-induced crack is always the common purpose for directional controlled...
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It is well known that the dynamic response of the structure to an earthquake excitation is affected ...
In PCAC(Po?os de Caldas Alkaline Complex),in southeastern Brazil,it is observed a polyphase minerali...
The article presents a brief history of the Institute of Geological Sciences(IGS)of the NAS of RA,an...
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