Entangled aluminium ion is world’s best timekeeper – Physics World
https://physicsworld.com/a/entangled-aluminium-ion-is-worlds-best-timekeeper... "Does anyone know what time it is?" https://youtu.be/8qssWO8NSq0
On 7/13/19, jim bell <jdb10987@yahoo.com> wrote:
https://physicsworld.com/a/entangled-aluminium-ion-is-worlds-best-timekeeper... "Does anyone know what time it is?" https://youtu.be/8qssWO8NSq0
https://www.youtube.com/watch?v=FWwNQqGTOEg https://www.youtube.com/watch?v=VQHkoHiGFMQ https://www.youtube.com/watch?v=4ff6CjYBhoI https://www.youtube.com/results?search_query=syllables+per+second https://www.youtube.com/watch?v=jwZ8D1H3yW8 Time nuts indeed.
On 7/13/19, grarpamp <grarpamp@gmail.com> wrote:
On 7/13/19, jim bell <jdb10987@yahoo.com> wrote:
https://physicsworld.com/a/entangled-aluminium-ion-is-worlds-best-timekeeper... "Does anyone know what time it is?"
https://www.youtube.com/watch?v=FWwNQqGTOEg https://www.youtube.com/watch?v=VQHkoHiGFMQ https://www.youtube.com/watch?v=4ff6CjYBhoI
https://www.youtube.com/results?search_query=syllables+per+second https://www.youtube.com/watch?v=jwZ8D1H3yW8
Time nuts indeed.
Last but not least, it's time to rock around... https://www.youtube.com/watch?v=l-O5IHVhWj0
On Saturday, July 13, 2019, 11:22:10 AM PDT, grarpamp <grarpamp@gmail.com> wrote: On 7/13/19, jim bell <jdb10987@yahoo.com> wrote:
https://physicsworld.com/a/entangled-aluminium-ion-is-worlds-best-timekeeper... "Does anyone know what time it is?" https://youtu.be/8qssWO8NSq0
Time nuts indeed.
About 15 years ago, I read a biography of Alfred Loomis https://en.wikipedia.org/wiki/Alfred_Lee_Loomis an extremely wealthy amateur scientist. He was very instrumental in developing radar in America just before, and during WWII. This was primarily done at MIT, in Building 20 (built supposedly for the duration of the war, plus 6 months, but in fact not demolished until about 1997.) I frequently visited Building 20 while at MIT, because that was the location of MITERS (MIT Electronic Research Society, the student electronic club.). It also housed TMRC (Tech Model Railroad Club) which I occasionally visited. At one point, Loomis visited England and ordered three (3) "Shortt Clocks", the most precise mechanical pendulum clocks ever created. https://en.wikipedia.org/wiki/Shortt%E2%80%93Synchronome_clock His choice to buy three of them, not one or two, showed that he was thinking ahead, and more important, THINKING. Get one clock, and you know very little about its accuracy. Get two clocks, and you only know how they differ, not which one is causing the difference. Get three clocks, and you can begin to do serious work about learning how accurate your knowledge of their performance really is. Jim Bell
On 7/13/19, jim bell <jdb10987@yahoo.com> wrote:
WWII ... Building not demolished until about 1997
Doubt any such non top-secret dusty places made it past 2000 unravaged by remodelers, various forms of take-it-home collectors, and renewed searches by archivists.
https://en.wikipedia.org/wiki/Shortt%E2%80%93Synchronome_clock
Though out of sync, the one pictured has 6.5 inHg vac on it, likely from the draw on the bottom left :) Here's an earlier generation... https://en.wikipedia.org/wiki/Riefler_escapement
Get three clocks, and you can begin to do serious work about learning how accurate your knowledge of their performance really is.
Yes, lot's of things use comparison schemes... NTP discrimination, Shuttle guidance computers, nonstop computing, some filesystems, GPS, etc. Lots of cool stuff on ebay, especially back during dotbomb and other thinning cycles.
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jim bell