detection of nuclear explosions
61Dense plasma focus — Plasma gun redirects here. For the science fiction weapon, see plasma weapon (fiction). A dense plasma focus (DPF) is a machine that produces, by electromagnetic acceleration and compression, a short lived plasma that is so hot and dense that it… …
62Asteroid deflection strategies — are methods by which near Earth objects could be diverted, preventing potentially catastrophic impact events. A sufficiently large impact would cause massive tsunamis and/or, by placing large quantities of dust into the stratosphere blocking… …
63Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …
64Earth exploration — Introduction the investigation of the surface of the Earth and of its interior. By the beginning of the 20th century most of the Earth s surface had been explored, at least superficially, except for the Arctic and Antarctic regions. Today the… …
65Reines , Frederick — (1918–1998) American physicist Born at Paterson in New Jersey, Reines was educated at the Stevens Institute of Technology and gained his PhD in theoretical physics at New York University in 1944. From 1944 to 1959 he was a group leader at the Los …
66USS George Eastman (YAG-39) — USS George Eastman (YAG 39), a Liberty type cargo ship, was laid down under Maritime Commission contract on 24 March 1943 by Permanente Metals Corp., Yard 2, Richmond, California; launched on 20 April 1943; sponsored by Mrs. Ann Trout man; and… …
67Pipeline transport — An elevated section of the Alaska Pipeline …
68Antarctica — /ant ahrk ti keuh, ahr ti /, n. the continent surrounding the South Pole: almost entirely covered by an ice sheet. ab. 5,000,000 sq. mi. (12,950,000 sq. km). Also called Antarctic Continent. * * * Antarctica Introduction Antarctica Background:… …
69Battleship — For other uses, see Battleship (disambiguation). The firepower of a battleship demonstrated by USS Iowa (ca. 1984) A battleship is a large armored warship with a main battery consisting of heavy caliber guns. Battleships were large …
70Forensic science — Forensics redirects here. For other uses, see Forensics (disambiguation). Forensic science …
