311–320 of 501 posts
So where do we stay up to date with whether it's valid or not.
https://polymarket.com/event/is-the-room-temp-superconductor... graphs the sentiment over time.
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Do you have a link handy for "we don't know how bikes work" ?
As a bit of an aside, most people don't know how bicycle wheels work. There's a whole section in https://en.wikipedia.org/wiki/The_Bicycle_Wheel that talks about how they actually work. It's not tension at the top, it's compression on the bottom.
if you want to test this take nearly all the pretension out of your spokes and sit on your bike. feel which ones are taught and which ones are completely loose. or just go to walmart. those bikes hardly have any pretension in their wheels.
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> sudden resistivity changes at a critical temperature (bizarrely high though that is in this case) How high? Just wondering if it might eventually be possible to use it in some power/clocking distribution layers of a semiconductor chip without bulky cooling.
That's a good idea. Honestly, I find it pretty amazing that modern CPUs don't just instantly turn into a puddle of molten metal as soon as you turn them on. The critical temperature is 127 C, as the other commenter mentioned. That seems like it's high enough to be useful in a computer CPU. I suppose there might also be applications for power distribution in a data center. You might use a few large, high-efficiency lo…
2. The disc is not hovering.
3. The disc is damaged; one edge is thicker/heavier than the other. Thus causes the rolling. Notice that the heavier part always stays on the magnet. It it were superconductive they would be able use a uniform disc.
I call BS.
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I'm assuming they mean the balance mechanism, and specifically what allows us to balance. How much is it the rider shifting their weight, how much is micro steering adjusts as we move forward, how much is the gyroscopic forces of the wheels, how much of it has to do with the angle of the handle bars to the wheel verse the center of weight. That said, I'm guessing this one is well understood by experts, but more compl…
I wonder what learning the specific system by which bikes are balanced would teach us about the world or human beings? It's such a banal thing to be so fascinating.
I actually find the ice skate a better example than a bike. We have all the physics solved for bikes, it's a complicated system but so is everything in motion. Hence we assume a spherical cow for the sake of the problem.
But ice skates... Now that's a funky one. Why do ice skates works? Ice skates aren't sharp bladed, they actually have flats. Ice is not slippery, it's when something is on ice in between our shoes and the ice that cause it to be slippery. Some people think it's the localized pressure of the blade that causes ice to locally melt. Hard to really wrap your head around. But it works :)
This is an extremely useful summarization of the original paper. > The authors believe that the modified/strained structure of their material creates a large number of “quantum wells” between particular lead atoms and the adjacent oxygens of the phosphate groups bound to them, in effect making a two-dimensional “electron gas”. They propose that electron tunneling between these quantum wells, which are between 3.7 and…
I want ONE breakthrough like this in my lifetime. Something completely game changing.
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>I would say they are not faking it, but instead they just don’t understand what they are looking at What? How do they get funding and lab space if they can't read their own measurements? Something is fishy here.
They in fact could not get funding and the research is funded by investment money. They explicitly thank their investors at the end.
Funding: This research was mainly supported by Quantum Energy Research Centre, Inc. and was also partially supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education(2019R111A1A01059675) and Young-Wan Kwon is supported by a Korea University Grant.
I don't know, either: what's the difference between receiving funding for research and taking investment money for it? Are you talking about public vs private funding?
This is an extremely useful summarization of the original paper. > The authors believe that the modified/strained structure of their material creates a large number of “quantum wells” between particular lead atoms and the adjacent oxygens of the phosphate groups bound to them, in effect making a two-dimensional “electron gas”. They propose that electron tunneling between these quantum wells, which are between 3.7 and…
I don't think the actual proposed superconductivity mechanism is the relevant part of this paper. It is much easier to prove that this is superconducting than to prove why. And in a sense it is a bit less relevant. Although developing a working theory for room temperature is also probably worth a Nobel prize, so I am willing to bet some theorists are also running to their blackboards as we speak.
If this material does just what they say it does, what would it revolutionise? Or as the article talks about, is this just a pointer at other possibilities that would be the real game changers?
Of course if you can make wire out of it, I wonder how much smaller your fusion reactor can get?
There are a lot of applications for even a thin film, consider spray coating a resonant cavity with it.
I'm sure there is a way to improve almost anything you could think about if you start talking about making CPUs with lower heat dissipation, perhaps enabling 3D designs and much more efficient computing... [edit: obviously there is a limit from literally the entropy in computing and transistors are most of that, I wonder if the superconductor is a good thermal conductor...]
I'm sure there are at least 222 startups that have some idea they're pitching right now ;-)
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As a bit of an aside, most people don't know how bicycle wheels work. There's a whole section in https://en.wikipedia.org/wiki/The_Bicycle_Wheel that talks about how they actually work. It's not tension at the top, it's compression on the bottom.
what do you mean it's not tension at the top? did you misspeak? bicycle spokes are solely under tensile forces. they can't support compressive forces at all. i'm a hobbyist wheel builder and a once upon a time professional bicycle mechanic during hs & college. if you want to test this take nearly all the pretension out of your spokes and sit on your bike. feel which ones are taught and which ones are completely loose…