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structuralism
(Encyclopedia)structuralism, theory that uses culturally interconnected signs to reconstruct systems of relationships rather than studying isolated, material things in themselves. This method found wide use from th...pipe
(Encyclopedia)pipe, hollow structure, usually cylindrical, for conducting materials. It is used primarily to convey liquids, gases, or solids suspended in a liquid, e.g., a slurry. It is also used as a conduit for ...art conservation and restoration
(Encyclopedia)art conservation and restoration, the preservation of structurally sound works of art, the halting of processes that lead to the damage of works of art, and the repair of already damaged works of art....Orlon
(Encyclopedia)Orlon, trademark for an acrylic fiber available in filaments (long single strands) or staples (bundles of short fibers). Orlon is resistant to sunlight and atmospheric gases, which makes it ideal for ...oxygen
(Encyclopedia)oxygen, gaseous chemical element; symbol O; at. no. 8; interval in which at. wt. ranges 15.99903–15.99977; m.p. −218.4℃; b.p. −182.962℃; density 1.429 grams per liter at STP; valence −2. T...group
(Encyclopedia)group, in mathematics, system consisting of a set of elements and a binary operation a∘b defined for combining two elements such that the following requirements are satisfied: (1) The set is closed ...Anaximenes
(Encyclopedia)Anaximenes ănˌəksĭmˈĭnēz [key], Greek philosopher, 6th cent. b.c., last of the Milesian school founded by Thales. With Thales he held that a single element lay behind the diversity of nature, a...dating
(Encyclopedia)dating, the determination of the age of an object, of a natural phenomenon, or of a series of events. There are two basic types of dating methods, relative and absolute. In relative dating, the tempor...rare-earth metals
(Encyclopedia)rare-earth metals, in chemistry, group of metals including those of the lanthanide series and actinide series and usually yttrium, sometimes scandium and thorium, and rarely zirconium. Promethium, whi...infrared radiation
(Encyclopedia)infrared radiation, electromagnetic radiation having a wavelength in the range from c.75 × 10−6 cm to c.100,000 × 10−6 cm (0.000075–0.1 cm). Infrared rays thus occupy that part of the electrom...Browse by Subject
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