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motivation

(Encyclopedia)motivation, in psychology, the intention of achieving a goal, leading to goal-directed behavior. Some human activity seems to be best explained by postulating an inner directing drive. While a drive i...

virology

(Encyclopedia)virology, study of viruses and their role in disease. Many viruses, such as animal RNA viruses and viruses that infect bacteria, or bacteriophages, have become useful laboratory tools in genetic studi...

cognitive psychology

(Encyclopedia)cognitive psychology, school of psychology that examines internal mental processes such as problem solving, memory, and language. It had its foundations in the Gestalt psychology of Max Wertheimer, Wo...

fire

(Encyclopedia)fire, the phenomenon of combustion as seen in light, flame, and heat. One of the basic tools of human culture, its use is extremely ancient, predating the existence of Homo sapiens by several hundred ...

Darwish, Mahmoud

(Encyclopedia)Darwish, Mahmoud, 1941–2008, widely considered the Palestinian national poet, b. Barwa, Palestine (now in Israel). He was born to middle-class Sunni Muslim farmers, who were displaced when soldiers ...

behaviorism

(Encyclopedia)behaviorism, school of psychology which seeks to explain animal and human behavior entirely in terms of observable and measurable responses to environmental stimuli. Behaviorism was introduced (1913) ...

Valla, Lorenzo

(Encyclopedia)Valla, Lorenzo lōrānˈtsō välˈlä [key], c.1407–57, Italian humanist. Valla knew Greek and Latin well and was chosen by Pope Nicholas V to translate Herodotus and Thucydides into Latin. From hi...

Organization for Security and Cooperation in Europe

(Encyclopedia)Organization for Security and Cooperation in Europe (OSCE), international organization established as the Conference on Security and Cooperation in Europe (CSCE) in 1973, during the cold war, to promo...

interferon

(Encyclopedia)interferon ĭnˌtərfērˈŏn [key], any of a group of proteins produced by cells in the body in response to an attack by a virus. A cell infected by a virus releases minute amounts of interferons, wh...

subsidence

(Encyclopedia)subsidence, lowering of a portion of the earth's crust. The subsidence of land areas over time has resulted in submergence by shallow seas (see oceans). Land subsidence can occur naturally or through ...