Townsend discharge — The Townsend discharge is a gas ionization process where an initially very small amount of free electrons, accelerated by a sufficiently strong electric field, give rise to electrical conduction through a gas by avalanche multiplication: when the … Wikipedia
Raether limit — The Raether limit is the physical limiting value of the multiplication factor (M) or gas gain in an ionization avalanche process (Townsend avalanche). Even though, theoretically, it seems as if M can increase without limit (exponentially),… … Wikipedia
GAZEUX (ÉTAT) — La matière se présente sous quatre états (solide, liquide, gazeux, plasma), dont les propriétés sont très différentes. Pour un corps pur et sous une pression donnée, le passage de l’un de ces états à un autre se produit lorsque la température… … Encyclopédie Universelle
china — /chuy neuh/, n. 1. a translucent ceramic material, biscuit fired at a high temperature, its glaze fired at a low temperature. 2. any porcelain ware. 3. plates, cups, saucers, etc., collectively. 4. figurines made of porcelain or ceramic material … Universalium
China — /chuy neuh/, n. 1. People s Republic of, a country in E Asia. 1,221,591,778; 3,691,502 sq. mi. (9,560,990 sq. km). Cap.: Beijing. 2. Republic of. Also called Nationalist China. a republic consisting mainly of the island of Taiwan off the SE coast … Universalium
Scientific phenomena named after people — This is a list of scientific phenomena and concepts named after people (eponymous phenomena). For other lists of eponyms, see eponym. NOTOC A* Abderhalden ninhydrin reaction Emil Abderhalden * Abney effect, Abney s law of additivity William de… … Wikipedia
CONDUCTION DE L’ÉLECTRICITÉ — Le terme de conduction électrique désigne l’ensemble des phénomènes qui ont pour effet la transmission d’électricité. L’aptitude d’une substance à conduire l’électricité se mesure par la résistivité ou par son inverse, la conductivité.… … Encyclopédie Universelle
Avalanche transistor — An Avalanche Transistor is a bipolar junction transistor designed for operation in the region of its collector current/collector to emitter voltage characteristics beyond the collector to emitter breakdown voltage, called avalanche breakdown… … Wikipedia
Decision field theory — (DFT), is a dynamic cognitive approach to human decision making. It is a cognitive model that describes how people make decisions rather than a rational model that prescribes what people should do. It is also a dynamic model of decision making… … Wikipedia
TURBULENCE — Le mot turbulence fait songer à agitation, désordre, chaos. L’évolution spatiale ou temporelle de nombreux phénomènes est caractérisée par l’absence apparente d’ordre, la coexistence d’échelles très différentes, l’impossibilité d’une reproduction … Encyclopédie Universelle
