Time Domain Reflectometry The pulse reflection method, pulse echo method or time domain reflectometry are several terms applied to what is referred to as cable radar or a TDR. The technique, developed ...

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This has, for the first time, made it ... Nov. 4, 2024 — Astronomers have discovered a supermassive black hole at the center of a galaxy just 1.5 billion years after the Big Bang that is ...

Subscribe now to get unlimited access to TIME.com and more! Scientists say the long-term increase in temperatures, driven by the constant increase of greenhouse gases in the atmosphere ...

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Optical clocks, for example, have the potential to define the unit of time — the second — to a more precise degree than is possible in the atomic clocks used at present.