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  • 131Bicycle lighting — has two purposes: seeing and being seen. There are many types of bicycle lights available, each with its own advantages and disadvantages. There is no one best solution for any rider, and many riders mix and match different technologies to… …

    Wikipedia

  • 132Thinned array curse — The thinned array curse (sometimes, sparse array curse ) is a theorem in electromagnetic theory of transmitters. It states that a transmitting aperture which is synthesized by a coherent phased array of smaller apertures that are spaced apart… …

    Wikipedia