cthalupa

74 ms·

931.
by cthalupa 3y ago
You're right - for whatever reason I had convinced myself YBCO had issues with both high current and high field. It's just high current - anything outside of a single grain has low current density. Doing some more research to help
932.
by cthalupa 3y ago
LK99 isn't necessarily a stand-in for helium cooled superconductors - if all SC were equivalent to any other, YBCO and similar would have been enough to make MRIs significantly cheaper - LN2 is easy and cheap to produce.
933.
by cthalupa 3y ago
Superconductors also have points where they stop superconducting because of the strength of the magnetic field or amount of current. YBCO and similar have these points below the useful level for MRIs. There's research around finding wa
934.
by cthalupa 3y ago
Based on our current data LK99 isn't a replacement for helium cooled superconductors for the same reason YBCO and similar aren't - critical current/critical magnetic field aren't in the right ranges for what we need out
935.
by cthalupa 3y ago
Not even close. Cold fusion was not something we thought was possible under our understanding of physics at the time (Muon-catalyzed fusion isn't what they thought CF was and there are all sorts of things that make it not really someth
936.
by cthalupa 3y ago
Not an expert in the area, but being passingly familiar with other major advancements and the timelines it's taken them to move from discovery to day to day use. Let's say we got a massive wave of independent replication of superc
937.
by cthalupa 3y ago
Yes and no. There's no possible way to have a superconductor be an actual hoverboard out in the broader world - the magnetic field of the earth is just nowhere near strong enough. You can make specialized areas where it would work, tho
938.
by cthalupa 3y ago
100K is very cold. But if this result pans out, it's a very good thing for the possibility that LK99 really is an RTAPS. There are a lot of explanations as to why they might not see bulk superconductivity at room temp - impurities in t
939.
by cthalupa 3y ago
I'll not take a personal stance on crypto in this comment, but it's really a stretch to try and compare the two. No one debates that there are significant and important uses for RTAPS. Lots of people debate if there are significan
940.
by cthalupa 3y ago
I wouldn't bet on LK99 being a RTAPS but "Replicating a bunch of weird shit that we don't really understand that at least somewhat align with the possibility" really isn't a damning position to be in when the starti
941.
by cthalupa 3y ago
> I'm actually surprised by the sheer lack of people commenting in the more-or-less-perma-LK-99 threads who show skepticism of the results. There's plenty of people that are skeptical and making it a point to tell everyone they
942.
by cthalupa 3y ago
>Honestly, I think anyone who thought the DFT-based papers mattered at all doesn't really get how science works. It's a very spicy take to say DFT-based papers don't matter at all. Anyone who thinks they conclusively prove
943.
by cthalupa 3y ago
It's a brand new class. The material cost is lower than most superconductors - it's lead and copper - but no one has any idea on fabrication, yield size, etc., now, so no good answers there.
944.
by cthalupa 3y ago
Iron and ferromagnetic objects would not react that way. The key to this showing diamagnetism is the fact that the same points are repelled in the same way regardless of the orientation of the magnet. If it was ferromagnetic, you could have
945.
by cthalupa 3y ago
And that's why you shouldn't particularly believe videos without providence. However, we have videos being posted by PhDs at universities and their students. The stakes are quite a bit higher if it turns out they were faking these
946.
by cthalupa 3y ago
Huh? Heat death of the universe is going to take an incomprehensibly large amount of time. Like, 10^106 years. The universe is A LOT younger than that.
947.
by cthalupa 3y ago
No one is saying they are subsidizing people scavenging. They're talking about farther up the chain.
948.
by cthalupa 3y ago
Fusion is not easy to sustain. The massive pressure in the center of the sun is instrumental in it working there - something we lack.
949.
by cthalupa 3y ago
CF wasn't something that was possible under our understanding of physics at the time. Room temp ambient pressure superconductors are perfectly possible under our understanding of physics. Comparing the two is silly.
950.
by cthalupa 3y ago
I don't understand how your comment implies a lack of subsidy, it only states that the people harvesting the material can make money off of it. Which would be true if it was subsidized, too.
951.
by cthalupa 3y ago
>All the actual scientists have been rock steady at, "it is probably not going to replicate," especially CMTC. Sinéad Griffin isn't an actual scientist? https://en.wikipedia.org/wiki/Sin%C3%A9ad_Griffi
952.
by cthalupa 3y ago
It's one of the biggest ones. My understanding is that there are still some others that need to be figured out, like "The physical structure holding the thing getting the everloving shit bombarded out of it by high energy neutrons
953.
by cthalupa 3y ago
https://www.findlaw.com/dui/arrests/dui-checkpoint-laws-by-s... Varies from state to state - in some states they are illegal under state law or state constitutions, etc. Looks like they're illegal in MI.
954.
by cthalupa 3y ago
That does not disprove my statement. As I noted in my more in-depth breakdown, compare 1:55 vs. 3:03 - you will see the same corner being lifted despite opposite sides of the magnet being used to lift it.
955.
by cthalupa 3y ago
>Isn't that what we are seeing in the video? No. All of these videos show the same part of the flake being repelled by both sides of the magnet, as well as other videos showing that the sample does not attract.
956.
by cthalupa 3y ago
https://targum.video/v/2023/8/1/41a0e9f410fbb85bb8f66d6d953b... this video also shows that the sample does not attract, so it cannot be ferromagnetic.
957.
by cthalupa 3y ago
At 1:55, we see a drop from the first side of the magnet. As we see it fall, we can tell that it is the rightmost corner that was standing. Take a look at the top edge - the two sequential dips. The bottom edge is a smooth-ish long curve th
958.
by cthalupa 3y ago
Her* But the paper is exciting, particularly with people now independently recreating the diamagnetic effect.
959.
by cthalupa 3y ago
Rosalind Franklin's work paved the way for Watson and and Crick. She and her PhD student took the photo that showed the double helix. The scientist leading the team at the lab, Maurice Wilkins, showed the photo to Watson and Crick. He
960.
by cthalupa 3y ago
Lots of impurities and limited quantity. Most of it was in ironsand, and even then most of it was in fairly low quality ironsand. They had to get pretty creative in their use of ironsand to produce high quality steel.

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