361–370 of 906 posts
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One catch would be the use of lead would restrict the use cases fairly heavily
Lead is used everywhere. Not in paint anymore but you can buy lead weights at hardware stores. Don't grind it up and put it in your muni water supply, but it's a household substance that is harmful if ingested, like many others.
Those are often bismuth weights.
After skimming the paper, it reads like a legitimate paper even though I have zero expertise in the area. That it is in Word instead of LaTeX makes it feel a bit less legitimate to me and they could of course always have some error in there setup. The most notable thing to me was that this was done in a thin film where structural defects are supposedly responsible for strain in the material which in turn enables the…
> After skimming the paper, it reads like a legitimate paper even though I have zero expertise in the area. Ummm am I the only one who finds this line hilarious?
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> the use of lead would restrict the use cases Most people aren't licking the insides of their computer processors, fusion reactors, radio telescopes and MRIs.
It's more about producing toxic waste and contaminating the environment - no one's licking the solder joints in their electronics either, but you still have to use lead-free solder. For instance in EU, https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A... Canada, https://www.canada.ca/en/health-canada/services/environmenta... USA, https://www.epa.gov/lead/learn-about-lead
Compared to refining traditional conductors and recycling/disposing of used electronics?
> you still have to use lead-free solder
One, fumes. Two, people touch their solder and then grab a cookie.
We're premature. The results need to be proven. But the benefits of RTP superconductors is mindblowingly high enough that risks from lead contamination (far from a novel problem, I might add) can be safely ignored.
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As long as you only want them to hover over a magnet...
Assuming the lift is there or the magnets are strong enough, it would be plausible to have an electromagnetic hover skate park where you could pay by the hour, and possibly even future X-game like events where the boards and riders could move in any direction they can get acceleration in.
- Please check out my paper, we just found a new superconductor, it has a critical temperature of 127 degrees. - Look, I'm a bit busy right now - Celsius
I don't understand, I assume it's a dialogue? What is the meaning of the punchline being Celsius? Does the first sentence intend to include "room-temperature"?
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It's more about producing toxic waste and contaminating the environment - no one's licking the solder joints in their electronics either, but you still have to use lead-free solder. For instance in EU, https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A... Canada, https://www.canada.ca/en/health-canada/services/environmenta... USA, https://www.epa.gov/lead/learn-about-lead
> more about producing toxic waste Compared to refining traditional conductors and recycling/disposing of used electronics? > you still have to use lead-free solder One, fumes. Two, people touch their solder and then grab a cookie. We're premature. The results need to be proven. But the benefits of RTP superconductors is mindblowingly high enough that risks from lead contamination (far from a novel problem, I might a…
You might want to read more in the links I shared about the harmful effects of lead before "whatabouting" to other problems of electronics recycling/waste.
and yes, it's entirely possible this application would get an exemption from usual restrictions on lead. For example in the EU directive, one of the exemptions is:
> Lead in solders for servers, storage and storage array systems, network infrastructure equipment for switching, signalling, transmission, and network management for telecommunications
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One obvious application: your family doctor will have an MRI machine in her office, same for all physio clinics
MRI will get much cheaper, but you still need a good upper critical field and a proper access control (Zone 2/3/4) protocol. So probably not in very small buildings.
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Copper does this already. It's not like ferromagnets. https://www.youtube.com/watch?v=sENgdSF8ppA
In the video, it's when they stop moving the magnet, it maintains its position, neither repelling nor attracting. Several physicists have spoken up and said this, and a few other tells distinguishes it from any conventional materials, which is why they made the video to begin with I'm sure. That said I'm just parroting back the things I've picked up from this discussion.
If you move the magnet, the metal will also move since you're inducing a current and the fields from the eddy currents will react against the moving magnet.
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They could only cause problems solvable by more superconducting railguns, so they're a net zero at worst.
> could only cause problems solvable by more superconducting railguns If the projectile is ferromagnetic, or potentially even just diamagnetic, a defense system involving shaped ultra-high intensity magnetic fields becomes conceivable.
- Please check out my paper, we just found a new superconductor, it has a critical temperature of 127 degrees. - Look, I'm a bit busy right now - Celsius
I don't understand, I assume it's a dialogue? What is the meaning of the punchline being Celsius? Does the first sentence intend to include "room-temperature"?