a simple radio receiver It uses only the power of the received radio signal to produce sound, needing no external power. It is named for its most important component, a crystal detector, originally made from a piece of crystalline mineral such as galena. This component is now called a diode.
radio transmitters around the world, including mobile telephones, handheld radios, mobile base stations, and television/radio broadcasting stations. • TV/FM station • GSM base station • WiFi (PoWiFi) • Etc. Powered by EPAM = ∙( 4 ∙ ∙ )2 Friis equation Soviet Union broadcast station – 12..500kW Belarus DVT-T TV station – 24.6kW
cooling at an electrified junction of two different conductors and is named after the French physicist Jean Charles Athanase Peltier who discovered it in 1834. Изображение Powered by EPAM
heat energy from a source of heat to what is called a heat sink. Heat pumps move thermal energy in the opposite direction of spontaneous heat transfer by absorbing heat from a cold space and releasing it into a warmer one. A heat pump uses a small amount of external power to accomplish the work of transferring energy from the heat source to the heat sink. Изображение Powered by EPAM • Soil-Water • Air-Air
Иванов Формулы творчества, или Как научиться изобретать Powered by EPAM Генрих Альтшуллер (Genrich Altshuller) Найти идею. Введение в ТРИЗ - теорию решения Use the resources of the existing system, subsystems, super- systems and the environment
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