atmospheric correction factor
1Klinkenberg correction — In petroleum engineering, a Klinkenberg correction is a procedure for calibration of permeability data obtained from a minipermeameter device. When using nitrogen gas for core plug measurements, the Klinkenberg correction is usually necessary due …
2Compressible flow — is the area of fluid mechanics that deals with fluids in which the fluid density varies significantly in response to a change in pressure. Compressibility effects are typically considered significant if the Mach number (the ratio of the flow… …
3dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or …
4Thermal radiation — is electromagnetic radiation emitted from the surface of an object which is due to the object s temperature. Infrared radiation from a common household radiator or electric heater is an example of thermal radiation, as is the light emitted by a… …
5Calorimeter — This article is about heat measuring devices. For particle detectors, see Calorimeter (particle physics). The world’s first ice calorimeter, used in the winter of 1782 83, by Antoine Lavoisier and Pierre Simon Laplace, to determine the heat… …
6Kilogram — Kg redirects here. For other uses, see Kg (disambiguation). Kilogram A computer generated image of the international prototype kilogram (IPK). The IPK is the kilogram. The IPK, which is roughly the size of a golf ball, sits here alongside a ruler …
7radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …
8Clutter (radar) — Clutter is a term used for unwanted echoes in electronic systems, particularly in reference to radars. Such echoes are typically returned from ground, sea, rain, animals/insects, chaff and atmospheric turbulences, and can cause serious… …
9Remote sensing — There are two kinds of remote sensing. Passive sensors detect natural energy (radiation) that is emitted or reflected by the object or surrounding area being observed. Reflected sunlight is the most common source of radiation measured by passive… …
10Alveolar gas equation — The alveolar pO2 is not routinely measured but is calculated from blood gas measurements by the Alveolar gas equation:p AO 2 = p IO 2 p ACO 2/R + F , where: * R is the Respiratory quotient (normally about 0.8)* pAO2 is the Alveolar pO2* pIO2 is… …
