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Frico IH Halogeninfra Gas burning patio heater. Radiant heating is a technology for heating indoor and outdoor areas. Heating by radiant energy is observed every day, the warmth of the sunshine being the most commonly observed example.
Solar insolation in Romania. Solar power in Romania had an installed capacity of 1,374 megawatt (MW) [1] [2] as of the end of 2017. The country had in 2007 an installed capacity of 0.30 MW, which increased to 3.5 MW by the end of 2011, [3] and to 6.5 MW by the end of 2012.
Diagram of leaky feeder cable. A leaky feeder is a communications system used in underground mines and inside tunnels. [1] Manufacturers and cabling professionals use the term "radiating cable" [2] [3] [better source needed] [4] as this implies that the cable is designed to radiate: something that a typical coaxial cable is generally not intended to do.
Radiant exitance of a surface, denoted M e ("e" for "energetic", to avoid confusion with photometric quantities), is defined as [1] =, where ∂ is the partial derivative symbol, Φ e is the radiant flux emitted, and A is the surface area.
Because radiation always transmits the energy, [2] it is useful to wonder what the speed of the transmission is. If all the radiation at given location propagates in the same direction, then the radiant flux through a unit area perpendicular to the propagation direction is given by the irradiance: [2]
US Vietnam War experience showed the need for air superiority fighters and better air-to-air training for fighter pilots. [11] Based on his experience in the Korean War and as a fighter tactics instructor in the early 1960s, Colonel John Boyd with mathematician Thomas Christie developed the energy–maneuverability theory to model a fighter aircraft's performance in combat.