1 Clinical Psychologist: Doctorate Degree in Psychology (4 to 7 years of graduate school) 2  Industrial-Organizational Psychologist: Master's Degree (2 to 3 years of graduate school)  Forensic Psychologist: Master's Degree (2 to 3 years of graduate school); a doctoral degree is recommended.
Submarine Propulsion Systems. During World War II, most American submarines were powered by diesel-electric systems. This was a departure from earlier submarine power systems, which were direct drive types, little changed from the earliest boats. In this direct-drive power system, the diesel engine is directly connected to the propeller shaft.
Hyman G. Rickover: Hyman G. Rickover, American naval officer and engineer who developed the worldâs first nuclear-powered engines and the first atomic-powered submarine, the USS Nautilus, launched in 1954. He then went on to supervise plans for harnessing nuclear energy for peaceful purposes. Brought up in Chicago,