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(Concrete Engineering) Moisture which is mechanically held in a material. In aggregates, that water which is not available to become part of the mixing water is designated "absorbed" water.
(Environmental Engineering) Synthetic organic compounds used for refrigerants, aerosol propellants (prohibited in the U.S.), and blowing agents in plastic foams. CFCs migrate to the upper atmosphere destroying ozone and increasing global warming. Typical atmospheric residence times are 50 to 200 years.
(english) (1) Permanently damaging a metal or alloy by heating to cause either incipient melting or intergranular oxidation. (2) In grinding getting the work hot enough to cause discoloration or to change the microstructure by tempering or hardening.
(english) Any vector can be expressed as a collection of vectors whose sum is equal to the original vector. Each vector in this collection is a component of the original vector. It is common to express a vector in terms of components which are parallel to the x and y axes.
(english) A hardened steel bar or plate that is shaped accordidng to the operation to be performed and the material to be machined.
(Software Engineering) the degree to which a product conforms to both explicit and implicit requirements
(english) Sand adhering to the surface of the casting that is extremely difficult to remove.
(Environmental Engineering) The biological oxidation of ammonia and ammonium sequentially to nitrite and then nitrate. It occurs naturally in surface waters, and can be engineered in wastewater treatment systems. The purpose of nitrification in wastewater treatment systems is a reduction in the oxygen demand resulting from the ammonia.
(english) Conforms to a standard or tolerance.
(Environmental Engineering) Particle destabilization to enhance agglomeration.
(Environmental Engineering) An attached growth biological process in which the microbial film is attached to non-moving rock or plastic media.
(english) Molten metal on the hearth of a furnace, in a crucible, or in a ladle