. . . . . . . "1925-08-22Z"^^ . . . "Gordon Eugene Martin is a physicist and author in the field of piezoelectric materials for underwater sound transducers. He wrote early computer software automating iterative evaluation of direct computer models through a Jacobian matrix of complex numbers. His software enabled the Navy Electronics Laboratory (NEL) to accelerate design of sonar arrays for tracking Soviet Navy submarines during the Cold War."@en . . "Gordon Eugene Martin"@en .