Warning: XSLTProcessor::transformToXml() [xsltprocessor.transformtoxml]: I/O warning : failed to load external entity "file:////srv-new/scielo/www/bases/xml/edu/v13n4/2077-2874-edu-13-04-23.xml" in /srv-new/scielo/www/htdocs/class.XSLTransformerPHP5.php on line 36 Student scientific activity: its dynamism in the educational teaching process at Ciego de Avila medical university