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Successful room temperature ambient-pressure magnetic levitation of LK-99

arxiv.org

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Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#471

Post by EvgeniyZh »

scarmig wrote: post #15
ufo wrote: post #6

Seems to be the same one that had a video a couple of days ago https://news.ycombinator.com/item?id=36953396 Back then, many asked if this was superconduction or merely diamagnetism. Does the new paper shine any light on this question?

The paper shows a clear phase transition to diamagnetism as the material is cooled. That would be seen in superconductors and not in regular diamagnetic materials. I'm not aware of any that have that kind of phase transition. Though since we're in weird territory here, it's important to note some weird non-superconductor behavior that's beyond regular diamagnetism might be going on as an alternative explanation. But…

Magnetic transitions as a function of temperature are not unheard of, and it makes sense for them to depend on external field (they are magnetic after all). Lanthanum cobaltite for example has transition from diamagnet to paramagnet, likely due to change of spin state (see, e.g., [1]). I'm not saying that's what's happening, but transition (if it is there, hastily written papers tend to have subtle inaccuracies) doesn't rule out non-SC diamagnetism

[1] https://www.sciencedirect.com/science/article/abs/pii/S09258...

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#472

Post by iraqmtpizza »

isaacfung wrote: post #272
bretpiatt wrote: post #170

Earlier quoted context omitted.

1) Subset breakthrough here potentially related to cancer, we'll see how the peer review and evolution to becoming an available standard of care goes. City of Hope scientists develop targeted chemotherapy able to kill all solid tumors in preclinical research https://www.eurekalert.org/news-releases/997141

A few weeks ago, there was news that some Harvard MIT researchers had discovered a chemical cocktail that can reverse aging. https://news.yahoo.com/harvard-mit-scientists-claim-chemical...

is heart damage considered aging? asking for the 1 in 35.

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#473

Post by mellosouls »

nindalf wrote: post #267
someplaceguy wrote: post #141

Earlier quoted context omitted.

It would have been more convincing if you had given real past examples rather than speculative future ones :) Although I'm pretty sure there are plenty that many people can think of, so it doesn't really detract much from your point.

Auctions, sanitary towels, retirement, banking, disposable razor, sewing machine, canned food, interchangeable parts, antibiotics, solar cells, postage stamp, light bulb, pencil, air conditioning, insurance, dwarf wheat, spreadsheet, cold chain, double entry book-keeping, S-bend, infant formula, clocks, public key cryptography, passports, batteries, printing press, video games, GPS, contraceptive pill, shipping conta…

A minor observation - pretty much all of those describe a type where applicable, except for iPhone. "Smartphone" would have been consistent and more accurate. I don't know if that's a bias or proofreading issue.

It's an interesting and thought-provoking list though.

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#474

Post by iraqmtpizza »

CSMastermind wrote: post #179
xvector wrote: post #143

Earlier quoted context omitted.

I'd go as to far as saying GPT-4 is capable of fairly complex reasoning, at least in my experience tossing complicated questions and situations at ChatGPT Plus.

When I was tutoring people in college for their computer science classes I was struck with how some people could do reasonably well on programming assignments and then when presented with anything even slightly novel would be completely unable to reason their way to a solution. A classic tell of this is people handling out of bounds errors in loops by trying to randomly add or subtract 1 from their for-loop parameter…

subtracting 1 from your loop variable and running again is common sense and the quickest way to narrow the problem. also, some people can still think while typing, still think while compiling and running.

this is all assuming that someone is trying to be productive rather than stop and ponder the abstraction that is a loop and divine its nature in a rigorous way

if the students are having problems with loops, that's not surprising considering that computer science doesn't teach software development skills. like... at all.

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#475

Post by actionfromafar »

balaji1 wrote: post #260
jliptzin wrote: post #198

Earlier quoted context omitted.

Antibiotics Electricity Internal combustion engine Flight Li-Ion batteries Radio communication

insane agricultural productivity. storage and transportation of food.

That’s all oil.

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#476

Post by inglor_cz »

anovikov wrote: post #385
nindalf wrote: post #267

Earlier quoted context omitted.

Auctions, sanitary towels, retirement, banking, disposable razor, sewing machine, canned food, interchangeable parts, antibiotics, solar cells, postage stamp, light bulb, pencil, air conditioning, insurance, dwarf wheat, spreadsheet, cold chain, double entry book-keeping, S-bend, infant formula, clocks, public key cryptography, passports, batteries, printing press, video games, GPS, contraceptive pill, shipping conta…

Passports are not a good invention. They are a dystopian evil we grew to take for granted and even see as something that exists for our own benefit. Before WWI there were no passports and no need for them. Those were Good Old Days that are not coming back. It's weird to see some people seeing some kind of benefit in them.

"Before WWI there were no passports and no need for them."

Passports are much older than that, but in pre-WWI Europe, most countries didn't require them for travel. (Russia and Turkey did.)

Passports certainly do have a dystopian element to them, especially if they are demanded too frequently / aggressively. But on their own, they aren't particularly evil; they just identify you much like your face does.

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#477

Post by King-Aaron »

belter wrote: post #460
King-Aaron wrote: post #438

Earlier quoted context omitted.

Have you got any back-story on that? I only saw that their team posted it to arxiv, hadn't heard the other drama

See this: https://news.ycombinator.com/item?id=36953050

Fascinating, thank you

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#478

Post by BaculumMeumEst »

pcrh wrote: post #461
jjallen wrote: post #432

One somewhat ironic fact of this story is that the rogue former employee perhaps deserves some credit for bringing this thing out into the world. They had been working on this for quite a long time themselves, rightfully so. But now the whole world is working on it and exploring other methods and combinations of materials I would assume (to improve upon the original design and avoid any patents). How long would they…

There's apparently a patent published in 2020. It surprises me that it never gained attention. edit: KR20210062550A - Mehtod of manufacturing ceramic composite with low resistance including superconductors and the composite thereof - https://patents.google.com/patent/KR20210062550A/en

people will claim all kinds of crazy, implausible shit in patents. you would go insane trying to draw conclusions from the set of applications sent to patent offices as a whole, it would be impossible to differentiate what is legitimately worth paying attention to.

Re: Successful room temperature ambient-pressure magnetic levitation of LK-99

#479

Post by acters »

suby wrote: post #457
jjallen wrote: post #442

Earlier quoted context omitted.

A former employee was the first to publish a paper with only three authors. I am surprised you haven't heard about this. Then a few hours later a paper was published with six authors (without one of the original three authors), ostensibly by the core team that has been working on this. There should be much more detail on the Internet if you search for it.

Notably, the missing author from the second paper is the rogue employee who published the first paper. The order of the first two authors is the same for both papers.

earlier in the week, someone posted that the person who posted the paper early is someone who wanted to fund the project, but the researchers didn't want to include him. So he took as much data as he could collect and posted it publicly with the addition of his name. He is not a researcher or scientist for the team.
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