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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

#141

Post by someplaceguy »

ChuckMcM wrote: post #129

For those experiencing this type of "black swan, but good" event for the first time, it is helpful to recognize that the human tendency to believe that all future "big events" will be dystopian downers, is statistically unsound. For a while I've kept a list of the things that could be "good" swan events, but to be fair I didn't have "room temperature superconductor on that list" :-) Other things that could happen: 1)…

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.

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

#143

Post by xvector »

icapybara wrote: post #137
ChuckMcM wrote: post #129

For those experiencing this type of "black swan, but good" event for the first time, it is helpful to recognize that the human tendency to believe that all future "big events" will be dystopian downers, is statistically unsound. For a while I've kept a list of the things that could be "good" swan events, but to be fair I didn't have "room temperature superconductor on that list" :-) Other things that could happen: 1)…

1) doesn't make a whole lot of sense. A perfect understanding of something doesn't mean you can fix anything wrong with it. 3) has already happened. The AI chat bots aren't very smart, but they're clearly capable of some degree of basic reasoning.

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.

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

#144

Post by marmakoide »

est wrote: post #92

So far lab replication efforts are: Two from HUST: https://www.bilibili.com/video/BV14p4y1V7kS/ https://www.bilibili.com/video/BV13k4y1G7i1/ One by USTC https://www.bilibili.com/video/BV1Ex4y1X7ix/ this tiny sample can stand on its pointy side. One by Qufu Normal University https://www.zhihu.com/zvideo/1669820225079070720 One with THU background but claims a personal project https://www.bilibili.com/video/BV14z4y1s7V…

I guess it's a mix of - It's a good opportunity to gain visibility by working something grabbing the news. 1st room temperature superconductor, that's big - (Under)graduate lab interns can be thrown onto any crash projects at will without much repercussion or resistance, boss is boss and should not be subject to questioning

I did a post-doc in China, so that's my sample size N=1 piece of cheap opinion

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

#145

Post by voidmain »

jacquesm wrote: post #36
Daneel_ wrote: post #29

Earlier quoted context omitted.

It’s difficult to rule out external factors - a badly attached probe could also result in zero resistance for example. Showing diamagnetism is one of the least error-prone ways to demonstrate the superconductor effect. That’s my understanding anyway.

> 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 inner probes have contact issues, the voltage (and inferred resistance) drops, potentially to zero.

[1] https://www.ni.com/docs/en-US/bundle/ni-daqmx/page/measfunds...

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

#146

Post by a_bonobo »

icapybara wrote: post #137
ChuckMcM wrote: post #129

For those experiencing this type of "black swan, but good" event for the first time, it is helpful to recognize that the human tendency to believe that all future "big events" will be dystopian downers, is statistically unsound. For a while I've kept a list of the things that could be "good" swan events, but to be fair I didn't have "room temperature superconductor on that list" :-) Other things that could happen: 1)…

1) doesn't make a whole lot of sense. A perfect understanding of something doesn't mean you can fix anything wrong with it. 3) has already happened. The AI chat bots aren't very smart, but they're clearly capable of some degree of basic reasoning.

There's a wonderful paper on 1) from a few years ago:

https://journals.plos.org/ploscompbiol/article?id=10.1371/jo...

>Could a Neuroscientist Understand a Microprocessor?

>We show that the [neuroscience experimental] approaches reveal interesting structure in the data but do not meaningfully describe the hierarchy of information processing in the microprocessor. This suggests current analytic approaches in neuroscience may fall short of producing meaningful understanding of neural systems, regardless of the amount of data.

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

#147

Post by marmakoide »

neteresy wrote: post #8

Korean scientists embody key cultural values: (Jeong) fosters deep bonds and commitment to their work; (In-gan-mi) encourages inherent honesty and sincerity; (Che-Myun) upholds honor, discouraging dishonesty; and Confucianism instills respect, loyalty, and duty. These values shape their dedication to research integrity and professional conduct. I choose to believe!

Yeah, nah https://en.wikipedia.org/wiki/Hwang_affair

National pride and science are not a very good mix

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

#148

Post by FriedPickles »

ChuckMcM wrote: post #129

For those experiencing this type of "black swan, but good" event for the first time, it is helpful to recognize that the human tendency to believe that all future "big events" will be dystopian downers, is statistically unsound. For a while I've kept a list of the things that could be "good" swan events, but to be fair I didn't have "room temperature superconductor on that list" :-) Other things that could happen: 1)…

I like the idea of this list. Some others: - Quantum supremacy - HIV vaccine - Synthetic life - Discovery of ET life - P vs NP solution

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

#149

Post by bawolff »

nocoder wrote: post #139

I get the idea of superconductivity at room temperature in theory. But I don't have enough knowledge to understand in real terms, how will the world change if this is true?

Everyone talking about all sorts of important applications.

All i want is a maglev hot wheels track using flux pinning.

Just imagine all the cool toys a room temp semiconductor would enable.

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

#150

Post by TheSpiceIsLife »

someplaceguy wrote: post #141
ChuckMcM wrote: post #129

For those experiencing this type of "black swan, but good" event for the first time, it is helpful to recognize that the human tendency to believe that all future "big events" will be dystopian downers, is statistically unsound. For a while I've kept a list of the things that could be "good" swan events, but to be fair I didn't have "room temperature superconductor on that list" :-) Other things that could happen: 1)…

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.

Nuclear weapons.

There hasn’t been a full scale war between major powers since.

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