Notice: Undefined property: stdClass::$fileId in /home/icstaror/journal.ic-star.org/lib/pkp/classes/db/SchemaDAO.inc.php on line 235
Notice: Trying to get property 'type' of non-object in /home/icstaror/journal.ic-star.org/lib/pkp/classes/db/SchemaDAO.inc.php on line 235
View of Activation of Natural Zeolite Mixture and Coal Flyash Using Microwave as Air Filter for the Improvement of Gasoline Four-Stroke Motorcycle Engine Acceleration