THE distance of the sun from the earth or, speaking more correctly—for the distance is, of course, variable—the semi-major axis of the earth's orbit, is the most important constant in astronomy. It ...
A common sight in ‘smart homes’, door sensors allow you to detect whether a door is closed or open, enabling the triggering ...
Abstract: A multiband antenna is presented for aircraft communication of traffic collision avoidance system (TCAS), distance measuring equipment (DME) and radio altimeter (RadAlt). This single antenna ...
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