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Nouvel, Jean

(Encyclopedia)Nouvel, Jean zhäN no͞ovĕlˈ [key], 1945–, French architect, grad. École des Beaux-Arts, Paris (1971). He opened his own firm in 1975, and became known for innovative techniques, the use of moder...

Novgorod

(Encyclopedia)Novgorod nôvˈgərət [key], city (1989 pop. 229,000), capital of Novgorod region, NW European Russia, on the Volkhov River near the point where it leaves Lake Ilmen. Novgorod's industries produce ch...

Noyce, Robert Norton

(Encyclopedia)Noyce, Robert Norton nois [key], 1927–90, American engineer, inventor, and entrepeneur, b. Burlington, Iowa.; grad. Grinnell College (B.A., 1949), Massachusetts Institute of Technology (Ph.D., 1953)...

nuclear reactor

(Encyclopedia)CE5 Power reactor system nuclear reactor, device for producing controlled release of nuclear energy. Reactors can be used for research or for power production. A research reactor is designed to pr...

nuclear weapons

(Encyclopedia)nuclear weapons, weapons of mass destruction powered by atomic, rather than chemical, processes. Nuclear weapons produce large explosions and hazardous radioactive byproducts by means of either nuclea...

nucleosynthesis

(Encyclopedia)nucleosynthesis or nucleogenesis, in astronomy, production of all the chemical elements from the simplest element, hydrogen, by thermonuclear reactions within stars, supernovas, and in the big bang at...

nucleus, in physics

(Encyclopedia)nucleus, in physics, the extremely dense central core of an atom. Following the discovery of radioactivity by A. H. Becquerel in 1896, Ernest Rutherford identified two types of radiation given off b...

nullification

(Encyclopedia)nullification, in U.S. history, a doctrine expounded by the advocates of extreme states' rights. It held that states have the right to declare null and void any federal law that they deem unconstituti...

nullity of marriage

(Encyclopedia)nullity of marriage, in law, an unlawful marriage that is either void or voidable because of conditions existing at the time of the marriage. A bigamous or incestuous marriage, for example, is void, a...

number

(Encyclopedia)number, entity describing the magnitude or position of a mathematical object or extensions of these concepts. A real or complex number z is called algebraic if it is the root of a polynomial equati...