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One of the most familiar applications of OMR is the use of #2 pencil (HB in Europe) bubble optical answer sheets in multiple choice question examinations. Students mark their answers, or other personal information, by darkening circles on a forms. The sheet is then graded by a scanning machine.
Scantron Corporation. A Scantron 888P machine, used for testing in schools. Scantron Corporation is an American company based in Eagan, Minnesota. Scantron provides assessment solutions and technology services for business, education, certification, and government clients. Scantron Assessment Solutions deals with scanner manufacturing, forms ...
Contrast-enhanced ultrasound ( CEUS) is the application of ultrasound contrast medium to traditional medical sonography. Ultrasound contrast agents rely on the different ways in which sound waves are reflected from interfaces between substances. This may be the surface of a small air bubble or a more complex structure.
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This is a list of acronyms, expressions, euphemisms, jargon, military slang, and sayings in common or formerly common use in the United States Marine Corps.Many of the words or phrases have varying levels of acceptance among different units or communities, and some also have varying levels of appropriateness (usually dependent on how senior the user is in rank [clarification needed]).
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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 ...