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Tracer-gas leak testing. A tracer-gas leak testing method is a nondestructive testing method that detects gas leaks. A variety of methods with different sensitivities exist. Tracer-gas leak testing is used in the petrochemical industry, the automotive industry, the construction industry [1] and in the manufacture of semiconductors, among other ...
Cavitation damage evident on the propeller of a personal watercraft. Cavitation in fluid mechanics and engineering normally refers to the phenomenon in which the static pressure of a liquid reduces to below the liquid's vapour pressure, leading to the formation of small vapor-filled cavities in the liquid. [ 1]
A response to an SAT math question marked on an optical answer sheet. An optical answer sheet or bubble sheet is a special type of form used in multiple choice question examinations. OMR is used to detect answers. The Scantron Corporation creates many optical answer sheets, although certain uses require their own customized system. [citation ...
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Aurora Generator Test. The diesel generator used in the Aurora experiment beginning to smoke. Idaho National Laboratory ran the Aurora Generator Test in 2007 to demonstrate how a cyberattack could destroy physical components of the electric grid. [1] The experiment used a computer program to rapidly open and close a diesel generator 's circuit ...
Microbubble. Microbubbles are bubbles smaller than one hundredth of a millimetre in diameter, but larger than one micrometre. They have widespread application in industry, medicine, [1] life science, [2] and food technology. [3] The composition of the bubble shell and filling material determine important design features such as buoyancy, crush ...
TestU01. TestU01 is a software library, implemented in the ANSI C language, that offers a collection of utilities for the empirical randomness testing of random number generators (RNGs). [ 1] The library was first introduced in 2007 by Pierre L’Ecuyer and Richard Simard of the Université de Montréal. [ 2]
A spirit level, bubble level, or simply a level, is an instrument designed to indicate whether a surface is horizontal (level) or vertical ( plumb ). Two basic designs exist: tubular (or linear) and bull's eye (or circular ). Different types of spirit levels may be used by carpenters, stonemasons, bricklayers, other building trades workers ...