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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

#341

Post by ETH_start »

dclowd9901 wrote: post #286
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…

I’ll add some more: Language, standards, the internet, agriculture, glass, sunscreen, resilient rice, sterilization, human flight, spontaneous development of sentient life in the universe… When you think about it all, you start to appreciate how miraculous things actually are.

Similar to language, money, which Nick Szabo—the person who first conceptualized a decentralized blockchain—speculates may have increased the carrying capacity of the environment ten fold and allowed humans to outcompete Neanderthals.

https://www.fon.hum.uva.nl/rob/Courses/InformationInSpeech/C...

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

#342

Post by mrtksn »

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)…

> Commercially viable fusion energy. Will change a lot of things

Considering that we already have a fusion reactor in the skies, I think that the room temp room pressure superconductor is the next best thing. Fusion is good but at this stage, the natural one will just do. Think global network of solar cells interconnected with LK-99.

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

#343

Post by birdiesanders »

macinjosh wrote: post #259
bawolff wrote: post #149

Earlier quoted context omitted.

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.

full of lead, haha!

I feel like lead in toys is worth a comeback, the "simpler times" people pine for were because lead.

I joke, of course.

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

#344

Post by fnordpiglet »

qnleigh wrote: post #263
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.

That's right. The standard way to measure resistance without being sensitive to contact resistance is called the four-terminal method, see ( https://en.m.wikipedia.org/wiki/Four-terminal_sensing ). You drive a current using two outer wires, but then detect the voltage across the sample using a different pair of wires. You'll measure zero voltage if it's superconducting, since V=IR. Or if one of the probe wires became…

It also doesn’t make sense to me because you would expect they didn’t just say “omg super conductivity!” on their first measurement and presumably measured more than once, verified connections, and generally assumed scrutiny would be high on any claim and (from what I’ve read of the history so far) the reason it’s from 1999 and published now is they didn’t believe it was real to begin with but believed it was a measurement mistake. This doesn’t mean others should be credulous and replication is crucial. But it seems to beggar reality to assume they made such an amateur mistake. I would assume outright fraud first.

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

#345

Post by nwiswell »

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…

As I read this list, the rhythm to We Didn't Start the Fire spontaneously started playing in my head.

Sorry not sorry if I just subjected you to the same.

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

#346

Post by rnk »

DrBenCarson wrote: post #190
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)…

If my understanding is correct, 2 is nearly solved if we have a room temp ambient superconductor

Please connect the dots for me. What does a room temp & atmosphere superconductor do for space travel? I am unaware of any obvious impact.

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

#347

Post by urinotherapist »

TheSpiceIsLife wrote: post #150
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.

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

Full scale war between Russia and Ukraine (with help of NATO) progressing right now with constant threats to use nuclear weapons or blow up a nuclear power station.

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

#348

Post by hwillis »

mycall wrote: post #314
heisenzombie wrote: post #248

Earlier quoted context omitted.

I think LK99 is a 1D — not 2D — material.

I still don't understand 0D and 1D. Quantum dots, nanoparticles.. are they really 3D but too small to measure?

1D just means it conducts in one direction. Like it's got tiny wires in it.

It's not particularly unusual; anisotropic conductive adhesive is used in your cellphone to glue the screen on. They tape over the electrical pads, then line up the corresponding LCD pads. The tape allows current to flow vertically between the pads, but for adjacent pads it's insulating.

Neodymium magnets are another example. They're made up of a little honeycomb, and inside the cells of the comb are very long, needles of neodymium a single atom thick. They create a magnetic field in a single direction.

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

#349

Post by rnk »

lottin wrote: post #313
ChicagoDave wrote: post #292

Earlier quoted context omitted.

1. Anti-gravity 2. Light year capable transport 3. Inertia dampers 4. Mass scale carbon capture technology 5. Robots to prepare space for habitation 6. World recognition to manage resources globally

> 6. World recognition to manage resources globally Do you mean communism?

Think of the sea and pirate trawlers destroying the seabeds everywhere. We need to manage it.

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

#350

Post by SanderNL »

deely3 wrote: post #328
Smoosh wrote: post #280

Earlier quoted context omitted.

I'm unsure if we want people living forever. While disease, illness, and senility are terrible things, as soon as people can live forever we will have eternal dictatorships (or people trying for it) as well as other questions of perpetual inequality. "Death renders all equal".

> we will have eternal dictatorships I can't agree. We can have eternal dictatorship now. Nothing prevents it except other people, therefore people will prevent eternal dictatorship just as now (with various results). Anyway, Im ready to accept this risk.

We cannot have them though? The leaders die and the resulting fights over succession is what keeps us out of eternal territory.

These maniacs didn’t have enough time to accrue enough mass to become power black holes, but give them a century or two to work with..

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