GC: n CT: In 1831, Michael Faraday, an English physicist gave one of the most basic laws of electromagnetism called Faraday’s law of electromagnetic induction. This law explains the working principle of most of the electrical motors, generators, electrical transformers and inductors. This law shows the relationship between electric circuit

GC: n CT: «Cybernetics» comes from the Greek: «the art of steering». In short, cybernetics is a discipline for understanding how actions may lead to achieving goals. Knowing whether you have reached your goal (or at least are getting closer to it) requires «feedback«, a concept that comes from cybernetics.

CG: nf CA: Biología animal y vegetal; Ecología; Climatología. CT: La fenología estudia cómo cambian las fechas en las que ocurren los diferentes fenómenos naturales (migración, reproducción, floración, fructificación, aparición de los insectos, etc.), que se repiten año tras año y que están muy influenciados por las condiciones meteorológicas. F:

CG : nm CT : Le fil d’Ariane est fortement recommandé sur l’ensemble des sites, particulièrement lorsque l’arborescence possède plus de 2 niveaux: il permet à l’utilisateur de revenir à une page de niveau supérieur en l’utilisant à la place du bouton «Retour» du navigateur ou de la navigation principale.

GC: n CT: Energy flow. As we have seen, generating and utilising energy means converting energy from one form into another. Often, intermediate steps are Implied. The energy flows through a number of forms, as well as conversion steps, between the source and the end-use. The costs increase accordingly. We

GC: n CT: The trend in final energy consumption by fuel type and by sector provides a broad indication of progress in reducing final energy consumption and associated environmental impacts by the different end-use sectors (transport, industry, services and households). The type and magnitude of energy-related pressures on the environment

CG: n CT:  A firewall is a system designed to prevent unauthorized access to or from a private network. You can implement a firewall in either hardware or software form, or a combination of both. Firewalls prevent unauthorized internet users from accessing private networks connected to the internet, especially intranets. All

Véase fisión nuclear

CG: nf CA: Ciencia y tecnología nucleares; Física atómica – Reactor nuclear; Tecnología energética. CT: En la fisión nuclear, cuando el núcleo estable es bombardeado por partículas, se rompe en dos núcleos desiguales más ligeros. En el proceso se libera energía (proceso exotérmico) y se produce la emisión de neutrones.

Cf. fission nucléaire

See nuclear fission

CG : nf CT : Certains radionucléides ont la particularité de pouvoir subir une réaction de fission nucléaire, sous l’effet d’un bombardement de neutrons de haute énergie («neutron rapides») : ce sont des atomes fissibles ; il s’agit de certains atomes lourds, notamment l’uranium 235, l’uranium 238 et tous les

GC: n CT: Pyrolysis is thermal degradation either in the complete absence of oxidizing agent, or with such a limited supply that gasification does not occur to an appreciable extent or may be described as partial gasification. Relatively low temperature are employed of 500 to 800 °C, compared to 800

GC: n CT: Flash steam power plants use hot water reservoirs. In flash plants, as hot water is released from the pressure of the deep reservoir in a flash tank, some if it flashes to steam. S: http://geothermal.marin.org/geopresentation/sld054.htm (last access: 26 February 2015) N: 1. Flash Steam Power Plants are

CG: n CT: Floating buoys have been developed which can generate energy from the bobbing or pitching motion caused by the waves. In some buoy type systems the buoy uses a simple mechanical system to turn a crankshaft. For example, in the Indian I-wave system the wave action raises the

CG: n CT: Calibrating a Parshall flume. Decrease water velocity: If the water velocity is too fast, the relationship between depth and velocity will be way off A small increase in depth will give you a disproportionately large change in discharge rate. You need to find some way to dissipate

CG: n CT: Since liquids are incompressible fluids, their flow rate depends only on the difference between the inlet and outlet pressures (Δp, pressure drop). The flow is the same whether the system pressure is low or high, so long as the difference between the inlet and outlet pressures is

CG : nm CT : Un fluide caloporteur est un liquide utilisé pour transporter de la chaleur d’un point à un autre. Dans un circuit de chauffage courant, le fluide caloporteur est simplement de l’eau qui est chauffée dans la chaudière destinée à céder sa chaleur en se diffusant dans

CG : nm CT : L’énergie géothermique provient de l’accroissement de température au fur et à mesure que l’on pénètre plus profondément dans l’écorce terrestre, soit du fait du gradient naturel (3 °C/100 m, avec un flux moyen de 60 mW/m2), soit du fait de singularités géophysiques (réservoirs géothermiques naturels

CG: nm CA: Física; Tecnología energética; Fuentes de energía renovables – Energía solar y Energía de la biomasa; Calefacción. CT: El elemento principal de la producción de calor es una caldera acuotubular ubicada en la parte superior sobre el hogar, con disposición vertical. A través del serpentín que recorre la

CG: nm CA: Geología – Geotermia; Tecnología energética; Fuentes de energía renovables – Energía geotérmica. CT: Energía geotérmica es la energía almacenada en forma de calor por debajo de la superficie sólida de la Tierra. Esta definición es oficial en Alemania (VDI 4640) y ha sido adoptada por el Consejo

CG: nm CA: Física – Fotometría; Alumbrado; Electricidad y Electromagnetismo. CT: Apuesta por la ecoeficiencia y las energías renovables como valor empresarial: La eficiencia energética se define como la reducción del consumo de energía manteniendo los mismos servicios energéticos, sin disminuir el confort y la calidad de vida, protegiendo el

GC: n CT: There are many types of open channel flow measuring devices available. Of these, flow measuring flumes are one of the most commonly used. How a Flume Operates Flumes are specially shaped, fixed hydraulic structures that under free-flow condtions force flow to accelerate in such a way that

CG : nm CT : Le flux lumineux – Les valeurs communément rencontrées courant 2013 pour des Led blanches monopuces (de tension d’alimentation comprise entre 2,9 VDC et 3,5 VDC, en mode continu) sont les suivantes, en fonction des différents courants (considérant des Led de type « top emitting »