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Her earlier career includes stints as science director at the U.S. Office of Naval Research (Global) and as a technical consultant at the Defense Advanced Research Projects Agency (DARPA).
TIMEKEEPER—As part of a Defense Advanced Research Projects Agency project, Yuan-Yu Jau is working on an atomic clock at Sandia that will use the element cesium, which has a natural resonance frequency of 9,192,631,770 hertz.
Source: https://phys.org/news/2023-08-world-smallest-atomic-clock.html