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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

#551

Post by phtrivier »

anonylizard wrote: post #523
phtrivier wrote: post #510

Earlier quoted context omitted.

For people who start the comic in the middle, can you provide the real names of the various superheroes mentionned here ?

The names are not helpful at all, because of Korean's overlapping surnames. But here you go. L&K = Sukbae Lee, Ji-Hoon Kim Korean professor: Young-Wan Kwon American professor: Hyun-Tak Kim Former (Long dead) professor: Tong-Seek Chair (Sample paper: https://link.springer.com/article/10.1007/BF02697404 )

> The names are not helpful at all, because of Korean's overlapping surnames.

Well, you have to provide the full name. Bummer :D

I assume the news would also be much shorter but slighly more confusing if we just called all "Joe"s "Joe" ?

Whereas they would be much less ambiguous but slighly harder if we all had a uuid assigned at birth. (Or maybe a checksum of our DNA ?)

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

#552

Post by seydor »

someplaceguy wrote: post #404
bobmaxup wrote: post #35

https://en.wikipedia.org/wiki/LK-99#Replication_attempts This Wikipedia article has a good summary of the replication attempts to date (including this paper).

Reading further below, I'm actually amazed by all the theoretical studies that have already been done from first principles (all apparently supporting the possibility of superconductivity). That's a pretty fast pace for science!

But have they asked chatgpt?

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

#553

Post by agumonkey »

wcerfgba wrote: post #455
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…

Exactly, the 99 stands for 1999, so potentially this material has existed for over 20 years and we could have started testing and replication on a much wider scale a decade ago. What benefit have we gained by disseminating this research so slowly?

One tiny thing, the compute power to research it in different ways maybe. In 99 the supercomputing/datascience landscape was very different.

Maybe not worth losing 20 years ... i don't know

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

#554

Post by dom96 »

anonylizard wrote: post #523
phtrivier wrote: post #510

Earlier quoted context omitted.

For people who start the comic in the middle, can you provide the real names of the various superheroes mentionned here ?

The names are not helpful at all, because of Korean's overlapping surnames. But here you go. L&K = Sukbae Lee, Ji-Hoon Kim Korean professor: Young-Wan Kwon American professor: Hyun-Tak Kim Former (Long dead) professor: Tong-Seek Chair (Sample paper: https://link.springer.com/article/10.1007/BF02697404 )

> because of Korean's overlapping surnames

This is why you list the full name, rather than just the surnames. As you've listed them they are quite helpful.

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

#555

Post by nindalf »

pineaux wrote: post #403
anovikov wrote: post #385

Earlier quoted context omitted.

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.

The Gestapo popularized passports. Think about that for a while.

Hitler was a vegetarian. Think about that for a while.

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

#558

Post by Cookingboy »

borissk wrote: post #290
asadm wrote: post #278

Earlier quoted context omitted.

Democracy is a diversion technique honestly. “Rulers” are always a few people/corps and the fate of the people depends on them.

Honestly there's a big difference in the way people live in North Korea and Switzerland.

I mean there is also a big difference in the way people live in India and Switzerland, and both are democratic countries. Your examples are the result of economic disparity, not political systems.

But if you compare India to China, one democratic and one not, suddenly it's not super clear which countries' citizens have "better" lives.

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

#559

Post by jacquesm »

voidmain wrote: post #145
jacquesm wrote: post #36

Earlier quoted context omitted.

> a badly attached probe could also result in zero resistance for example No, a badly attached probe would usually show a larger resistance, not a smaller one. That's actually the easiest error to make, making improper contact with the sample. The resistance is measured indirectly using a reference current. So you'd measure a higher resistance or a break rather than zero if a probe were not attached correctly (unless…

It's apparently hard to measure zero vs extremely low resistance with the two probe setup you are imagining (I guess because the probes and wires aren't superconducting, so most of the resistance in the circuit is not in the sample). The graphs I have seen are all made with a four probe setup [1], where a constant current is run through the outer probe pair and the voltage across the inner pair is measured. If the in…

I am not imagining a 'two probe' setup (see other comment in this thread).

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

#560

Post by ant6n »

danbruc wrote: post #435
concordDance wrote: post #406

Earlier quoted context omitted.

> this pushes my odds above 50% for the first time. Time for you to make some money then? :D https://polymarket.com/event/is-the-room-temp-superconductor...

Can one know how many people are in that market? When prediction markets where mentioned early during the LK-99 story, I looked a bit around out of interest, which platforms exist, which topics they cover, how many people participate in that markets. Where I could find the number of predictors, it seemed pretty underwhelming - one, ten, fifty, a hundred, I think the highest I ever saw was a bit over a thousand, but e…

I wanted to bet 10$ or so, but the two links above both seem to be some sort of cryptocurrency thing. I dunno, isn’t there a way to gamble on the future that isn’t so… shifty?
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