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Chemical oxygen demand (COD)

(Environmental Engineering) The amount of oxygen required to oxidize any organic matter in the water using harsh chemical conditions.

Stiffness:

(english) This is a general term which may be applied to materials or structures. When a force is applied to a structure, there is a displacement in the direction of the force; stiffness is the ratio of the force divided by the displacement. High stiffness means that a large force produces a small displacement. When discussing the stiffness of a material, the concept is the same, except that stress substitutes for force, and strain substitutes for displacement; see modulus of elasticity.

Mass balance

(Environmental Engineering) An organized accounting of all inputs and outputs to an arbitrary but defined system. Stated in other terms, the rate of mass accumulation within a system is equal to the rate of mass input less the rate of mass output plus the rate of mass generation within the system.

Design walkthrough

(Software Engineering) a formal technical review of the design

Preliminary design

(Software Engineering) creates representation of the data and architecture

Base Metal Contamination

(english) Dirt or other impurities in the steel strip.

Project database

(Software Engineering) the place where configuration items are kept

Beta testing

(Software Engineering) testing that is conducted by the user

Constraints

(Software Engineering) an restrictions or limitations placed on requirements or design

Bandsaw

(english) A power saw, the blade of which is a continuous,narrow,steel band having teeth on one edge and passing over two large pulley wheels.

Basis path testing

(Software Engineering) a white box test case design technique that used the algorithmic flow of the program to design tests

ACCUMULATOR

(english) A vessel, normally cylindrical, which is used to store fluid and gas for future release of the energy in the compressed fluid and gas. Normally contains a diaphragm or piston between the fluid (liquid) and gas chambers. Fluid is normally introduced at one end and the gas at the opposite end.

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