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In the early 90s, Prof. Choi theorized a new way of creating a room temperature superconductor but it wasn't really accepted by the mainstream. Supposedly, in 1999, two researchers in Choi's lab, Lee and Kim (hence LK), created the first sample of LK-99. They weren't able to reliably replicate nor were they able to fully explain the theory.

In 2017, as a dying wish, Choi asked Lee and Kim to continue on with the LK-99 research but asked to not publish it until they understand the theory behind it.

They founded a lab and collaborated with other scientists in the field and Kwon was one of them.

4 months ago, Kwon left the lab and two weeks ago Kwon leaked the paper. The paper Kwon leaked only listed Lee, Kim and Kwon as the authors and excluded other collaborators. Some suspect Kwon excluded the other collaborators because Nobel prize can only be awarded to three people at most. A few days after the leak, Lee & Kim hastily published a paper with four more authors but not Kwon.

https://namu.wiki/w/LK-99/%EC%A0%84%EA%B0%9C

>Most likely, the material LK99 as reported in [1-3] is a heterophase structure, with co-existent non-superconducting constituents. This may yield superconducting droplets surrounded by nonsuperconducting material...

https://arxiv.org/abs/2308.01723

>In fact, I find that Cu on this Pb(2) is 1.08 eV more energetically favorable than Cu on the Pb(1) site, suggesting possible difficulties in robustly obtaining Cu substituted on the Pb(1) site.

https://arxiv.org/abs/2307.16892

The paper from Dr. Griffin at LBNL suggests copper atoms have to be placed in a specific (but less likely) position in the molecule to result in the desired flat band characteristic. Also, the original authors and the labs who were able to replicate LK-99 are reporting they had to make multiple batches to even find a tiny piece that shows levitation. This suggests that you just have to be very lucky to produce a sample with high enough concentration of LK-99 to observe levitation.

If we can somehow confirm that LK-99 is truly a room temperature superconductor, billions of dollars of R&D fund will pour in to improve the fabrication process. When the first transistor was invented, people probably weren't imagining that we'll be mass producing them in nanometer scale in the future. Or maybe LK-99 will be stuck in a lab like graphene. Who knows?

With the current fabrication process, they're only getting a chunk with LK-99 particles sprinkled in. Since nobody yet knows how to fabricate a pure chunk of LK-99, it'll be hard to measure the true resistance of LK-99.

This can take a while. With the current fabrication process, they're only getting a chunk with LK-99 particles sprinkled in. Since nobody yet knows how to fabricate a pure chunk of LK-99, it'll be hard to measure the true resistance of LK-99.

Clubhouse? The Facebook?

My company enforced 2FA on our GSuite accounts and discouraged using SMS for 2FA. Well, every year a new iPhone comes out, employees buy the new iPhone and factory reset their old phone. Now their 2FA codes are gone. Only recently Google Authenticator supported backing up to the cloud.

Trying to do 2FA correctly is one thing and trying to make your whole company do it correctly is a whole other challenge...

Mr. Beast is a content creator creating content. It's pretty obvious he's doing it for content and he doesn't deny it either. I guess the sprinkle of "philanthropy" flavor is rubbing some people the wrong way but he seems far less dodgy than some celebrity philanthropists or evangelists.

It's appalling some people are more upset that his motives were not altruistic than being happy for the people who got their eye sight back.

Are we going to start criticizing doctors next because they're saving lives to get paid?

He started from nothing and he's still a billionaire so I wouldn't just dismiss him like that.

He's just a different type of businessman who likes making big risky bets.

I went to Google IO in 2014 and it was very exciting as a young engineer. Google Glass, Google Cardboard, Modular Smartphone, 3D space scanning tablet, Android Wear, and Android Auto were all announced there.

Now it seems Android Wear never really took off and Android Auto is the only product that made it to somewhat mainstream.

I'm not seeing much exciting experimental projects from Google anymore but maybe I'm just older and not easily excited.

So you're telling me instead of the fragile and complicated shield on the James Webb Telescope, we could've used the entire moon as a shield?

China already has a rover on the far side of the moon so my hopes aren't high.

Once in a while I'll see news from Korea get blown out of proportion and make it to the front page of HN when the same topic didn't even make it to the front page of Korean news.

This article made it sound like the government will just start paying loners so I had to look up some Korean sources. Apparently, S.Korean government already has a program to financially help "at-risk youths" from households below median income and either not in school or have frequent trouble with the law. The news is now saying they'll include reclusive youths in the program. The article doesn't really say the criteria to qualify but it's not like the government will handout allowances to millions of loners like the title makes it seem.

I think we now have the technology to build the talking portraits we saw in Harry Potter. Voice, facial movements, dialogs that matches the character can all be generated by AI now. I'm just not sure if this can be done realtime yet to interact with another person.

In the future, you may be able to have a conversation with a portrait of your parents even after they pass away. (So collect as much training data now?)

Even if the TV requires internet connection and the OS is garbage, once I set the input source to Chromecast, I never have to interact with the TV's OS.

Can someone tell me why this is a big problem? I just plug in a Chromecast with Google TV and I never have to touch the TV remote or see the TV's original Smart TV UI ever.

Isn't this solvable by just plugging in a $50 streaming stick of your choice?

If someone setup a Ponzi scheme and and disclose to everyone that it is a Ponzi scheme, and people still put money in it, is it illegal?

There's a thin line between Social Security and Ponzi scheme and I'm not sure where this one lands.

Also, was Do Kwon's intentions malicious? Does it matter?

As the famous saying goes “Markets can remain irrational longer than you can remain solvent”.

There are many people who predicted the 2008 financial crisis but only a few of them were able to time it right make a profit.

Largest by market cap. That's mainly due to investor hype. With that logic, you can argue Nikola was a top 10 largest car company in the world at one point (with zero vehicles delivered).

Tesla is not even in top 10 in terms of revenue or number of vehicles sold.

Even if this comment is true, I wouldn't short TSLA. There are too many irrational TLSA investors..

So you prefer to not put a password on your laptop because you prefer having a laptop that isn't capable of deciding you're not allowed to use it?

Another reason is that companies try to maximize profit, not profit per employee.

If a company can 1.5x their profit by doubling their headcount, they would do it even if it seems less efficient because that's what the investors want.

Instead of Google Authenticator, I use Twilio Authy. It syncs the 2FA code across my devices. I keep a backup device at home.

Sure, it's not the most secure way but I trust this over carriers securing my number.

If anyone is actually going to use this for their top secrets, I can find two things to be aware of.

* When you decrypt then close the tab and open the tab again via the recently closed tab, the password is still there.

* Browser extensions could read the contents of the webpage.

So if anyone is going to use this, they should do it in a "clean" incognito browser without any extensions.

I thought so too but I think you need to know the constellations first to identify the North Star in the photo.

30 years later, millennials will be on their smartphones while complaining kids these days never come out of their VR world.

I'm not sure if it's still in use but iPhones used to hit http://www.apple.com/library/test/success.html to test connectivity.

I used to use it to test connectivity on my own apps because Apple is probably better at making sure a url reachable than I am.

Majority of early startups still don't make it past the valley of death even during a bull market.

This is like saying every great sailor happened to sail when the wind was blowing in the right direction.

That may be an America thing. In Asia, you'll almost always get reusable chopsticks at a restaurant.

This reads like a Jr engineer's argument on why some text editor is better than vim after only learning a couple vim commands. Pincers have a lower learning curve but chopsticks are so much more versatile if you're skilled with it.

Here's when chopsticks are more useful than pincers. * Grabbing something wide like a large meatball. * Slicing soft food like tofu. * Separating bones in a chicken wing. * Eating noodles (you have to go in wide, close, keep parallel)