Path: ...!feeds.phibee-telecom.net!weretis.net!feeder8.news.weretis.net!reader5.news.weretis.net!news.solani.org!.POSTED!not-for-mail From: Jan Panteltje Newsgroups: sci.electronics.design Subject: Re: Strings that can vibrate forever (almost) Date: Sat, 25 May 2024 05:04:00 GMT Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; ISO-8859-15 Content-Transfer-Encoding: 8bit Injection-Date: Sat, 25 May 2024 05:04:02 -0000 (UTC) Injection-Info: solani.org; logging-data="784451"; mail-complaints-to="abuse@news.solani.org" User-Agent: NewsFleX-1.5.7.5 (Linux-5.15.32-v7l+) Cancel-Lock: sha1:gzuvO4xlWPQ/FEYfWyGrjuMfkm0= X-Newsreader-location: NewsFleX-1.5.7.5 (c) 'LIGHTSPEED' off line news reader for the Linux platform NewsFleX homepage: http://www.panteltje.nl/panteltje/newsflex/ and ftp download ftp://sunsite.unc.edu/pub/linux/system/news/readers/ X-User-ID: eJwFwQEBACAIA7BKHgU0jsLfP4Kbz0BUrvBYLtepZ7BHritkpBHWjZGzyWuOoT1aBoWforCbjVl8p7NgH2YgFkM= Bytes: 2410 Lines: 28 On a sunny day (Thu, 23 May 2024 11:04:02 +0200) it happened Jeroen Belleman wrote in : >On 5/23/24 07:08, Jan Panteltje wrote: >> Strings that can vibrate forever (kind of) >> https://www.sciencedaily.com/releases/2024/05/240522130402.htm >> Source: >> Delft University of Technology >> Summary: >> Researchers have engineered string-like resonators capable of vibrating longer at ambient temperature >> than any previously known solid-state object -- approaching what is currently only achievable near absolute zero >> temperatures. >> Their study pushes the edge of nanotechnology and machine learning to make some of the world's most sensitive mechanical >> sensors. >> >> Interesting for inertial navigation! >> >> Mechanical 214 kHz resonator with a Q of 6.6 billion at room temperature >> see paper: >> https://www.nature.com/articles/s41467-024-48183-7 >> figure 4 >> > >Interesting, indeed, but this looks *very* fragile! Yes, but maybe not enough free space to move so much it breaks? I just hope they used a Faraday cage and kept it away from other sources and their harmonics in the 214 kHz range. Wallwarts! bats? some other piezo stuff.