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Saad S. Alrwashdeh, Ph.D., is an assistant professor and researcher at Mutah University and Helmholtz-Zentrum Berlin, Jordan, Germany. He has a Ph.D. in renewable energy from TU Berlin: Technische Universität Berlin, where he studied the investigation of water transport in PEMFCs. Before TU Berlin: Technische Universität Berlin, he earned his Master of Engineering degree from Mutah University. He currently an assistant professor in the Mechanical Engineering department of Mutah University. ."