The official Blackpink (kpop group) light sticks from one of their tours have this functionality built in. The annoying part is that one of their Spotify albums have this 18-20khz control track present, and (when I was younger) I could hear it and it annoyed the heck out of me.
that's the max temp beyond which it loses superconductivity, not a requirement. The paper has a graph of max current vs temp, and it gets vastly better at actual room temp of ~300k
In a normal conducting material eddy currents dissipate relatively quickly. The shard of material in the magnet video appears to be floating quite stably for dozens of seconds, which implies that eddy currents are not being dissipated. I'm personally excited, I think it's the real deal but with some limits on maximum field strength and current
Huh, same! I remember the changeover happened sometime around fifth grade, so 2011-12 for our district? (Strangely enough our school's wifi used WEP until 2014ish. I remember the password was obviously contrived to the right length)
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