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psychotherapy

(Encyclopedia)psychotherapy, treatment of mental and emotional disorders using psychological methods. Psychotherapy, thus, does not include physiological interventions, such as drug therapy or electroconvulsive the...

spintronics

(Encyclopedia)spintronics, spin electronics, or magnetoelectronics, science and technology that harnesses the spin state of electrons in addition to the electrical charge state to store data or perform calculation...

Brook Farm

(Encyclopedia)Brook Farm, 1841–47, an experimental farm at West Roxbury, Mass., based on cooperative living. Founded by George Ripley, a Unitarian minister, the farm was initially financed by a joint-stock compan...

mechanics

(Encyclopedia)mechanics, branch of physics concerned with motion and the forces that tend to cause it; it includes study of the mechanical properties of matter, such as density, elasticity, and viscosity. Mechanics...

jet propulsion

(Encyclopedia)CE5 Types of jet engines: In the propeller-driven turbine a stream of high-velocity gases provides the power to drive the turbine and turn the propeller. In the jet-driven turbine the stream of gas...

Achebe, Chinua

(Encyclopedia)Achebe, Chinua chĭnˈwä ächāˈbā [key], 1930–2013, Nigerian writer, b. Albert Chinualumogu Achebe. A graduate of University College, Ibadan (1953), Achebe, an Igbo who wrote in English, is one ...

Donatello

(Encyclopedia)Donatello dŏnətĕlˈō, Ital. dōnätĕlˈlō [key], c.1386–1466, Italian sculptor, major innovator in Renaissance art, b. Florence. His full name was Donato di Niccolò di Betto Bardi. In his for...

existentialism

(Encyclopedia)existentialism ĕgzĭstĕnˈshəlĭzəm, ĕksĭ– [key], any of several philosophic systems, all centered on the individual and his relationship to the universe or to God. Important existentialists o...

embroidery

(Encyclopedia)embroidery, ornamental needlework applied to all varieties of fabrics and worked with many sorts of thread—linen, cotton, wool, silk, gold, and even hair. Decorative objects, such as shells, feather...

Victor Emmanuel II

(Encyclopedia)Victor Emmanuel II, 1820–78, king of Sardinia (1849–61) and first king of united Italy (1861–78). He fought in the war of 1848–49 against Austrian rule in Lombardy-Venetia and ascended the thr...