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sintering

(Encyclopedia)sintering, process of forming objects from a metal powder by heating the powder at a temperature below its melting point. In the production of small metal objects it is often not practical to cast the...

Red River Settlement

(Encyclopedia)Red River Settlement, agricultural colony in present Manitoba, North Dakota, and Minnesota. It was the undertaking of Thomas Douglas, 5th earl of Selkirk. Wishing to relieve the dispossessed and impov...

ultrasonics

(Encyclopedia)ultrasonics, study and application of the energy of sound waves vibrating at frequencies greater than 20,000 cycles per second, i.e., beyond the range of human hearing. The application of sound energy...

appeal

(Encyclopedia)appeal, in law, hearing by a superior court to consider correcting or reversing the judgment of an inferior court, because of errors allegedly committed by the inferior court. The party appealing the ...

Hague Tribunal

(Encyclopedia)Hague Tribunal, popular name for the Permanent Court of Arbitration established in 1899 by a convention of the First Hague Peace Conference to facilitate arbitration and other forms of dispute resolut...

Plutarch

(Encyclopedia)Plutarch plo͞oˈtärk [key], a.d. 46?–c.a.d. 120, Greek essayist and biographer, b. Chaeronea, Boeotia. He traveled in Egypt and Italy, visited Rome (where he lectured on philosophy) and Athens, an...

Siegbahn, Karl Manne Georg

(Encyclopedia)Siegbahn, Karl Manne Georg, 1886–1978, Swedish physicist. In 1913, he began a series of experiments that led to the discovery of the M series of X rays and demonstrated the shell arrangement of elec...

découpage

(Encyclopedia)découpage dāˌko͞opäzhˈ [key], any process of decorating surfaces in which paper cutouts made of new materials completely cover the surface. These cutouts are attached to the work by pasting or g...

encaustic

(Encyclopedia)encaustic, painting medium in which the binder for the pigment is wax or wax and resin. Examples of encaustic tomb portraits from Roman Egypt bear witness to the durability of the medium, which is tho...

freezing

(Encyclopedia)freezing, change of a substance from the liquid to the solid state. The temperature at which freezing occurs for a pure crystalline solid is called the freezing point and is a characteristic of the pa...