useful cross section

См. также в других словарях:

• Radar cross section — (RCS) is a measure of how detectable an object is with a radar. For example a stealth aircraft (which is designed to be undetectable) will have design features that give it a low RCS, as opposed to a passenger airliner that will have a high… …   Wikipedia

• Neutron cross section — Science with Neutrons Foundations Neutron temperature Flux · Radiation  …   Wikipedia

• Optical cross section — or OCS is a value which describes the maximum amount of optical flux reflected back to the source. The standard unit of measurement is . It is dependent on the geometry and the reflectivity at a particular wavelength of an object. Optical cross… …   Wikipedia

• Photoionisation cross section — in the context of condensed matter physics refers to the probability of a particle (usually an electron) being emitted from its electronic state. Cross section in photoemission The photoemission is a useful experimental method for the… …   Wikipedia

• Section (fiber bundle) — In the mathematical field of topology, a section (or cross section) of a fiber bundle, pi; : E rarr; B , over a topological space, B , is a continuous map, f : B rarr; E , such that pi; ( f ( x ))= x for all x in B .A section is a certain… …   Wikipedia

• Cross-country skiing — Priit Narusk in the qualification for the Tour de Ski in Prague. Nickname(s) XC skiing Characteristics Categorization Outdoor or indoor in ski tunn …   Wikipedia

• Cross-linked polyethylene — PEX redirects here. For other uses, see Pex (disambiguation). Cross linked polyethylene, commonly abbreviated PEX or XLPE, is a form of polyethylene with cross links. It is formed into tubing, and is used predominantly in hydronic radiant heating …   Wikipedia

• Cross product — This article is about the cross product of two vectors in three dimensional Euclidean space. For other uses, see Cross product (disambiguation). In mathematics, the cross product, vector product, or Gibbs vector product is a binary operation on… …   Wikipedia

• Cross-multiplication — In mathematics, specifically in elementary arithmetic and elementary algebra, given an equation between two fractions or rational expressions, one can cross multiply to simplify the equation or determine the value of a variable. For an equation… …   Wikipedia

• Emblems of the International Red Cross and Red Crescent Movement — The emblems of the International Red Cross and Red Crescent Movement, under the Geneva Conventions, are to be placed on humanitarian and medical vehicles and buildings to protect them from military attack on the battlefield. There are four such… …   Wikipedia

• The True Cross —     The True Cross     † Catholic Encyclopedia ► The True Cross     (AND REPRESENTATIONS OF IT AS OBJECTS OF DEVOTION).     (1) Growth Of the Christian Cult;     (2) Catholic Doctrine on the Veneration of the Cross;     (3) Relics of the True… …   Catholic encyclopedia