Optimum currency area — In economics, an optimum currency area (OCA), also known as an optimal currency region (OCR), is a geographical region in which it would maximize economic efficiency to have the entire region share a single currency. It describes the optimal… … Wikipedia
Solar hot water — is water heated by the use of solar energy. Solar heating systems are generally composed of solar thermal collectors, a fluid system to move the heat from the collector to its point of usage. The system may use electricity for pumping the fluid,… … Wikipedia
Solar thermal collector — A solar thermal collector is a solar collector specifically intended to collect heat: that is, to absorb sunlight to provide heat. Although the term may be applied to simple solar hot water panels, it is usually used to denote more complex… … Wikipedia
Solar thermal energy — Solar thermal system for water heating in Santorini, Greece … Wikipedia
Copper indium gallium selenide solar cells — Copper indium gallium selenide (CuIn1 xGaxSe2 or CIGS) is a direct bandgap semiconductor useful for the manufacture of solar cells. Because the material strongly absorbs sunlight, a much thinner film is required than of other semiconductor… … Wikipedia
radiation measurement — ▪ technology Introduction technique for detecting the intensity and characteristics of ionizing radiation, such as alpha, beta, and gamma rays or neutrons, for the purpose of measurement. The term ionizing radiation refers to those… … Universalium
Fiber laser — A fiber laser or fibre laser is a laser in which the active gain medium is an optical fiber doped with rare earth elements such as erbium, ytterbium, neodymium, dysprosium, praseodymium, and thulium. They are related to doped fiber amplifiers,… … Wikipedia
Personajes de Bobobo — Anexo:Personajes de Bobobo Saltar a navegación, búsqueda Diferentes personajes aparecidos en la serie de Bobobo (, ボボボーボ・ボーボボ?, Bobobō bo Bō bobo), especialmente en su versión animada. Entre paréntesis aparece su nombre original, o el que se… … Wikipedia Español
nuclear reactor — Physics. reactor (def. 4). Also called nuclear pile. [1940 45] * * * Device that can initiate and control a self sustaining series of nuclear fission reactions. Neutrons released in one fission reaction may strike other heavy nuclei, causing them … Universalium
solar cell — a photovoltaic cell that converts sunlight directly into electricity. * * * Any device that directly converts the energy in light into electrical energy through the process of photovoltaics (see photovoltaic effect). Solar cells do not use… … Universalium
Chernobyl disaster — This article is about the 1986 nuclear plant accident in Ukraine. For other uses, see Chernobyl (disambiguation). Chernobyl disaster … Wikipedia
