controlled sampling
51steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
52Deepwater Horizon oil spill — 2010 oil spill and BP oil spill redirect here. For other oil spills in 2010, see 2010 oil spill (disambiguation). For the 2006 oil spill involving BP, see Prudhoe Bay oil spill. For the drilling rig and explosion, see Deepwater Horizon… …
53Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
54wind instrument — /wind/ a musical instrument sounded by the breath or other air current, as the trumpet, trombone, clarinet, or flute. [1575 85] * * * ▪ music Introduction any musical instrument that uses air as the primary vibrating medium for the… …
55Pixel — This article is about the picture element. For other uses, see Pixel (disambiguation). This example shows an image with a portion greatly enlarged, in which the individual pixels are rendered as little squares and can easily be seen …
56Roland Corporation — Infobox Company company name = Roland Corporation company company type = Public corporation (tyo|7944, Osaka) foundation = April 18, 1972 location city = Hamamatsu location country = Japan key people = Ikutaro Kakehashi area served = industry =… …
57Analysis of variance — In statistics, analysis of variance (ANOVA) is a collection of statistical models, and their associated procedures, in which the observed variance in a particular variable is partitioned into components attributable to different sources of… …
58Polychlorinated dibenzodioxins — See also: 2,3,7,8 Tetrachlorodibenzodioxin, Dioxins and dioxin like compounds, and 1,4 Dioxin General structure of PCDDs where n and m can range from 0 to 4 Polychlorinated dibenzodioxins (PCDDs), or simply dioxins, are a group of organic… …
59Spectrum analyzer — A spectrum analyzer Spectrum analyzer display A spectrum analyzer measures the magnitude of an input signal versus frequency with …
60Multiple comparisons — In statistics, the multiple comparisons or multiple testing problem occurs when one considers a set of statistical inferences simultaneously.[1] Errors in inference, including confidence intervals that fail to include their corresponding… …
