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Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

arxiv.org

161–170 of 316 posts

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#161

What are the implications in general of room temperature superconductors? I just know that they needed typically ultra low temperatures right? But what would be the practical implications?

Hyperloop

SCMaglev is a better design and application, no need for low pressure.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#162

Earlier quoted context omitted.

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What isn't true? Is both the average and the variance of IQ in men/women identically equal? Why would we even expect it to be?

Is the likelihood of risk taking behaviour identically equal between men/women? Why would we even expect it to be?

Is the likelihood that a man/women will be identically equally interested in a career in the hard sciences? Why would we even expect it to be?

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#163

Earlier quoted context omitted.

Yes, but computer chips are powered by DC.

Power dissipation in chips isn't an issue with the DC power supply but switching the current billions of times a second.

I thought that was the switching loss of the transistors themselves, not the interconnects?

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#164

Earlier quoted context omitted.

Oh, did he write about this? Maybe I should check him out.

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I'm not hearing much argument for why I might be wrong, other than pearl clutching, tone policing and guilt by association

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#165
post #23

https://www.bilibili.com/video/BV14p4y1V7kS/ Latest update: the diamagnetism has been confirmed from a tiny LK-99 replica sample. The Author posted: > Under the guidance of Professor Haixin Chang, postdoctor Hao Wu and PhD student Li Yang from the School of Materials Science and Technology of Huazhong University of Science and Technology successfully for the first time verified the LK-99 crystal that can be magnetica…

Doesn't anyone working in the physical sciences know how to record a decent video that isn't shaky, blurry, out-of-focus, or a handheld mobile phone recording of a computer screen? He's using a digital microsocope! Just press the "record" button and upload that! I can't wait for someone to successfully reproduce it, use a polaroid camera to take the photo, print it out, fax it, and have someone scan in the photocopy,…

I feel like one of the reasons is that it is a lot harder to fake a shaky video than a still one and he won't need to add in his voiceover in comparing to if he is directly recording from the digital microscope presumably.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#166
post #126

Earlier quoted context omitted.

I feel it's pretty clear he's aiming for the Nobel if it's true. It can only be split three ways, after all.

Yeah, but that is quite amateurish. Just having the paper out first does not establish priority for the Nobel. What you need is the first paper with solid proof . It has happened more than once before that the guys with the second or third paper won the Nobel because the earlier paper was too weak.

To add a concrete example: Randy Hulet at Rice claimed BEC first, then Wieman and Cornell at Colorado, then Ketterle at MIT. Wieman, Cornell and Ketterle shared the Nobel. Hulet was passed over, because his data was judged insufficient to establish his claim.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#167
post #28

Earlier quoted context omitted.

> 1) it takes a undergrad to make and measure a superconductor by a Nobel laureate to explain it. Another example of Taleb’s idea that experimentation comes first and theories second. Universities pretend that it’s the other way around but apart from an Einstein it’s usually not.

It's a feedback loop. Experimental results suggest new theories, which suggest new experiments to test those theories.

That's what I am thinking when commenters compare LLMs with humans. Humans got the experimental loop going through the real world, pure LLMs are brains in vats. They need experimental confirmation to become truly creative.

But on the other hand are the commenters who think AGI to ASI is going to take hours. When is there time to experiment anything? Even ASI needs real world confirmation to do research.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#169
post #95

This is why space exploration is important. If we could find some astroid having superconductor materials at room temperature, everything will be revolutioned here.

I strongly disagree with this view. We don’t even know if such material can exist, and the intersected odds of it 1) existing 2) naturally and 3) us stumbling into it in the short term are astronomically low. Not saying space exploration is not important, but the reason you cite for it is about at the bottom of the list.

> Space exploration

> Astronomically low

Why, yes, my dear fellow. That’s the name of the game.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#170
post #130

Earlier quoted context omitted.

Note that the resistance of superconductors is 0 only for DC currents. The AC resistance is not 0 and typically gets larger for higher frequencies!

Yes, but computer chips are powered by DC.

At the frequencies computer chips operate, it acts more like AC. Sure, you place some nice bypass capacitors capacitors very close to the chip so you can feed it nice clean DC power, but when you start switching those transistors in the GHz range, the signals inside the chip rapidly start to look a lot like AC.

You see the same thing with external signals, like a connection between CPU and memory. Operate the bus at 1MHz and it is effectively DC. The signal has a wavelength of 300 meters, so when the signal travels a distance literally two orders of magnitude smaller across your motherboard the AC behavior is negligible. Operate that same bus at 1GHz and your wavelength is down to 30cm. Got a 40cm-wide motherboard? Better treat it like a transmission line or it isn't going to work!

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