A new atomic clock is one of the world’s best timekeepers, researchers say — and after years of development, the “fountain”-style clock is now in use helping keep official U.S. time. Known as NIST-F4, ...
When installing the camera for crime prevention purposes it is troublesome to have to buy special equipment. However, if it is a simple thing, if you want to keep it for the time being, there is a ...
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