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IMAGEN	These virtual laboratories constitute one of the fi rst efforts in the Ecuador to develop on-line interactive educational tools to illustrate structural dynamic concepts for earthquake engineering. Graduate students and professional engineers will fi nd these modules useful in understanding the cutting edge techniques used to design earthquake resilient structures. About 500 visitors per month from around the world access the fi ve modules currently available on the Internet.
This research was primarily supported by the Tecnica Particular de Loja University UTPL. This support is gratefully acknowledged.