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• PHOTOGRAPHIE — La perception de l’apparence du monde matériel par notre organe visuel a comme support la lumière visible ou les autres radiations électromagnétiques, rendues visibles par l’intermédiaire de phénomènes auxiliaires. L’emploi direct de l’ensemble… …   Encyclopédie Universelle

• Battery (electricity) — For other uses, see Battery (disambiguation). Various cells and batteries (top left to bottom right): two AA, one D, one handheld ham radio battery, two 9 volt (PP3), two AAA, one C, one …   Wikipedia

• Evoked potential — Intervention MeSH D005071 An evoked potential (or evoked response ) is an electrical potential recorded from the nervous system of a human or other animal following presentation of a …   Wikipedia

• Dielectric elastomers — (DEs) are smart material systems which produce large strains (up to 300%[citation needed]) and belong to the group of electroactive polymers (EAP). Based on their simple working principle dielectric elastomer actuators (DEA) transform electric… …   Wikipedia

• photography, technology of — Introduction       equipment, techniques, and processes used in the production of photographs.  The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …   Universalium

• Mercury coulometer — is an electroanalytical chemistry device using mercury to determine the amount of matter transformed (in coulombs) during the following reaction: Hg2+ + 2e– = Hgo[1] These oxidation/reduction processes have 100% efficiency with the wide range of… …   Wikipedia

• technology, history of — Introduction       the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …   Universalium

• plaque — [ plak ] n. f. • 1562; « monnaie » XVe; de plaquer 1 ♦ Matériau, élément de matière rigide, plat et peu épais. ⇒ feuille. Petite plaque. ⇒ plaquette. Plaque d ardoise, de verre (⇒ carreau) , de carton. Plaque de métal, de plastique utilisée en… …   Encyclopédie Universelle

• plaqué — plaque [ plak ] n. f. • 1562; « monnaie » XVe; de plaquer 1 ♦ Matériau, élément de matière rigide, plat et peu épais. ⇒ feuille. Petite plaque. ⇒ plaquette. Plaque d ardoise, de verre (⇒ carreau) , de carton. Plaque de métal, de plastique… …   Encyclopédie Universelle

• Optics — For the book by Sir Isaac Newton, see Opticks. Optical redirects here. For the musical artist, see Optical (artist). Optics includes study of dispersion of light. Optics is the branch of …   Wikipedia

• Пищевод Барретта — Barrett s esophagus Endoscopic image of Barrett s esophagus, which is the area of red m …   Википедия