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New replication video coming from China https://twitter.com/lereguy/status/1686363900651151360 https://twitter.com/lereguy/status/1686363900651151360
by drexlspivey 3y ago
New replication video coming from China
https://twitter.com/lereguy/status/1686363900651151360 https://twitter.com/lereguy/status/1686363900651151360
- ChoHag 3y ago[dead]
- zevv 3y agohttps://nitter.net/lereguy/status/1686363900651151360 https://nitter.net/lereguy/status/1686363900651151360
- RandallBrown 3y agoCan someone explain how this video shows superconductivity?
- 7moritz7 3y agoIt shows the magnetic effects associated with superconductors, which are omnidirectional from my understanding, in contrast to a 'regular magnet'
- declan_roberts 3y agoThere's all kinds of cool examples of this using liquid nitrogen to make a superconductor exhibit the Meissner effect. The material in question will have these effects at room temperature and pressure. https://youtu.be/HRLvVkkq5GE?t=53 https://youtu.be/HRLvVkkq5GE?t=53
- mrtksn 3y ago[not an expert but...]It shows strong diamagnetism(being repelled by both of the poles of a magnet), which is a property of superconductors. Not necessarily a superconductor though, that’s still to be established but at least it shows that the inventors are up to something and it’s not complete fabrication.
- RyEgswuCsn 3y agoI am no expert on this topic, but I feel this is similar to how ferrofluid forms "spikes" when placed near a magnet. Are they related?
- mrtksn 3y agoI'm not an expert too but AFAIK ferrofluids are actually attracted by magnets. The spikes are probably as a result of having strong and weak locations of magnetic field and the the liquid rushing into those. But yes, Maybe I'm interpreting the video wrongly. Yet, to me it looks like the bulky part of the sample is being repelled by both poles of the magnet as it stands upright with the pointy end at the bottom each time. IMHO if this was due to attraction, the pointy end would be at the top.
- Nmi2osv7 3y agoNo. The spikes are pulled toward the magnet (ferromagnetism) whereas superconductivity is repelled by the magnet (diamagnetism.)
- bilsbie 3y agoWhy don’t they try heating it and seeing if the effect goes away? You could even try a welding torch or something.
- norturnn 3y agoThere are better, less destructive ways to test the transition temperature. Apparently LK-99 is hard to make in bulk, so they probably don't want to torch their sample.
- dylan604 3y agoor just stick it outside in a heat dome? don't you have one near you?
- lost_tourist 3y agolol or a temperature chamber that the vast majority of labs have? heck I made a toaster oven that will go anywhere from 100F to 400F with an arduino and a $3 toaster oven from the junk store.
- 7moritz7 3y agoI have seen three now from China alone. Plus a calculation from some respected institute from today that confirms the theory
- fallingknife 3y agoWhy are they all from China? Why are they able to replicate so much faster than US labs?
- Ancapistani 3y agoThey have a lot of labs, and materials sourcing is easier for them. That’s partially because China is the origin of lots of stuff, and partly because the US regulated red phosphorus as a meth precursor.
- mrandish 3y agoAdditionally, it appears some of the original team members were concerned about possible industrial spying or leaks and that 'other parties' might be moving to replicate which was part of the impetus for rushing to publish. So, it's possible that some team(s) in China may have already been starting, underway or at least thinking about it.
- wredue 3y agoWhere was this? I haven’t seen this, but it definitely explains the drama surrounding this whole situation. It couldn’t have come at a worse time for drama either, as the right wing is currently on possibly their most massive anti-science tirade world wide that they’ve ever pushed.
- mrandish 3y ago> it definitely explains the drama surrounding this whole situation. It was in a Twitter thread linked on an HN thread a couple days ago wherein someone had done some digging online into resumes, publication histories, etc and recapped a bunch of the apparent history of LK99 and the related scientists and institutions. Sorry, I didn't bookmark it. But it contained quite a bit more drama including possible team conflict over potential Nobel credit and a deathbed promise to the team's mentor, one of the initial LK99 discoverers. No matter how this turns out, there's probably a helluva good book or movie in the backstory as it appears to be a team of unlikely underdogs stubbornly pursuing a long-shot while scraping together minimal funding over many years, being passed over for tenure, taking on unrelated side work and having their initial paper rejected by Nature, etc. It makes me extra hopeful that LK99 is at least an interesting novel material, even if not a superconductor.
- delfinom 3y agoCan't tell if it's a troll by having a video clip of a video clip
- svnt 3y agoYou mean the fact that someone is recording their screen with the microscope video feed at the same time as the magnet in the hand they are placing underneath the scope? It looks like a pretty bog-standard lab video to me. In addition to being the fastest way that doesn’t require any video editing, I can’t really think of a way to do it that would be more likely to be real.
- Glant 3y agoAt the bottom of the video is a progress bar, which presumably means they screen recorded a clip instead of uploading the original. I think that's what the parent comment is referring to.
- nemof 3y agohere's the original video, i assume the twitter user didn't know how to download or deeplink to it so they screen recorded it. https://vdn3.vzuu.com/HD/7d42236a-3065-11ee-a787-7e9db7aa394b-v8_f2_t1_FSe4Szlh.mp4?disable_local_cache=1&bu=http-4e83193b&c=avc.8.0&f=mp4&expiration=1690912411&auth_key=1690912411-0-0-8f5ba4f6a173f7f72536469fd310b73b&v=tx&pu=4e83193b https://vdn3.vzuu.com/HD/7d42236a-3065-11ee-a787-7e9db7aa394...
- bagels 3y agoAccess denied
- RcouF1uZ4gsC 3y ago[flagged]
- jurimasa 3y ago[flagged]
- zulban 3y agoEven the Chinese academy of science admits it has a massive fraud and plagiarism problem.
- fttx_ 3y agoSure, but does that mean if a reputable researcher at a reputable university (which do exist outside the US and Western Europe) provides strong evidence, should we discount all that simply because Chinese academia has a fraud and plagiarism problem? Speaking of, I'd guess that the likes of Australian National University, Victoria University of Wellington, University of Tokyo and National University of Singapore (amongst others) would magically count as "American or Western European" for this test.
- dirtyid 3y agoYes and west has their replication crisis which is massive fraud in all but name. PRC biases towards applied science so will get more applied science fraud. Ultimately countries with large R&D base strategy comes down to generating as much talent as possible and then spamming science at scale then seperating wheat from chaff via commercialization. First scientific community filters out what's valid - see PRC science+innovation climbing western rankings controlled for quality. Then market commercializes what works.
- verytrivial 3y agoHang on, wouldn't a sliver of any magnetic material behave like this within a moving magnetic field? This replication is a fail, yes?
- jeron 3y agoFrom the paper about the replication, they cast strong doubts on the original paper and consider it a fail
- drexlspivey 3y agoBoth polarities repel the material, a normal magnetic material would attract the second time
- marshray 3y agoNeither lead nor copper are what we would normally consider a "magnetic material" like iron. That it interacts strongly with a magnetic field shows that a big change in the material, consistent with superconductivity, has occurred. Quantum level effects are newly appearing in the macroscopic world, and that's always interesting.
- Melatonic 3y agoCould this not also have a big use case outside of superconductivity? Decellerators or accelerators for maglev trains or similar?
- marshray 3y agoOh, definintely! Most materials are diamagnetic, but only very weakly so. I think that a new room-temperature material that was so strongly diamagnetic that it could lift the weight of its own volume in lead probably would bring some interesting new applications.
- crooked-v 3y agoFor example, anything with a bearing in it used in an application where it's safe to have a strong permanent magnet.
- deleted 3y ago[deleted]
- RivieraKid 3y agoChina is very good at replicating.
- modzu 3y agoi dont suppose this is pyrolytic carbon
- Palpatineli 3y agoDoesn’t have to be. One of the ingredients has diamagnetism already