Theoretically, could/should we use these for signalling as well? Small strands of superconducting wire instead of fiberglass?
Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2
171–180 of 316 posts
Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2
#172Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2
#173Earlier quoted context omitted.
If we assume it isn't superconductivity, is the amount of diamagnetism still novel/interesting if not a world changing?
Only if it's significantly more than pyrolytic graphite, which appears to be the record-holder at the moment. It would have to be sufficiently strongly diamagnetic to levitate over ordinary magnets, which could have interesting applications. Think low-friction and low-vibration bearings, etc...
A pseudo-anonymous tweet comparing pyrolitic graphite to the new substance:
https://twitter.com/iris_igb/status/1685731177523449856?s=46...
https://twitter.com/iris_igb/status/1685804254718459904?s=46...
Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2
#174https://www.bilibili.com/video/BV14p4y1V7kS/ Latest update: the diamagnetism has been confirmed from a tiny LK-99 replica sample. The Author posted: > Under the guidance of Professor Haixin Chang, postdoctor Hao Wu and PhD student Li Yang from the School of Materials Science and Technology of Huazhong University of Science and Technology successfully for the first time verified the LK-99 crystal that can be magnetica…
Doesn't anyone working in the physical sciences know how to record a decent video that isn't shaky, blurry, out-of-focus, or a handheld mobile phone recording of a computer screen? He's using a digital microsocope! Just press the "record" button and upload that! I can't wait for someone to successfully reproduce it, use a polaroid camera to take the photo, print it out, fax it, and have someone scan in the photocopy,…
Imagine you have dreamed of some new discovery your whole life. Let's say you are convinced that, I don't know, there exists in the world a naturally bright pink species of cat. You study cats; you know their behaviors, and can guess at the means of finding this elusive pink jungle cat. You search for years to no avail... when suddenly, without prior warning you are on vacation in some remote island and hear a rumor. This pink cat you've searched for is known to the locals, and they can tell you exactly how to find them. You follow the guidance and sure enough -- there they are! The legends are true! You're shaking with excitement and want to document this finding for other pink cat researchers, but you don't have any professional equipment. Just your phone... but any evidence is better than nothing, right??
TL;DR: You are not the intended audience for these videos. They're not trying to convince you -- it's meant for other researchers. We are just seeing the leaks.
Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2
#175Earlier quoted context omitted.
Your [2] source only mentions statistics since 2012. It's disingenuous to think this could spread down to 1901 if you wish to use the 1.8% as a point to argue. Society was very different a hundred years ago. Women's access to education amongst other things has improved severely over time, and we do have seen an increase in female Nobel laureates compared to the earlier days. It's a matter of time.
Sure, it doesn't spread down to 1901, but the uptick started around 1970s [1]. Anyway, my main rant was about the inefficiency of giving awards to "lone geniuses", at most three, of expecting said "lone wolves" to exist in the first place, and then comes the discussion if the wolves are male or not. Unfortunately it got derailed into talking about pseudoscientific scalars such as IQ and sex binaries. [1] "large scale…
Most Nobel winners get their prizes during their 60s-70s. It means that people who graduated in the 1970s are just starting to get their Nobels.
And the trend of aging winners continues as research become more complex and specialized and therefore requires more experience. The time between theory and the practical discovery (Nobel prizes are only for the latter) increase as experiments become more complex too. So much that it may become difficult for theorists to get a Nobel in their lifetime. That LK99 thing, if real, is more the exception than the rule.
Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2
#176Earlier quoted context omitted.
[flagged]
I'm not hearing much argument for why I might be wrong, other than pearl clutching, tone policing and guilt by association
All of a sudden it seems the commenters have started name-calling and stereotyping the poster (realjhol) without any evidence or links to dispute his statements. Maybe replying in good faith would be a more helpful discussion, with links to support/deny his arguments?
Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2
#177I have a PhD in material science and worked with superconductors, here are two things that is often misunderstood: 1) it takes a undergrad to make and measure a superconductor but a Nobel laureate to explain it. 2) in theory if you understand the mechanism of something you can improve it. In material science however almost always all you need is a trial and error approach to end up with a good result. Conclusion: the…
Also PhD Materials Chemist. Agree completely. I follow superconductor publications and this is the only RT claim that has made me tell my friends "this could be the one". Using an electron paramagnetic resonance instrument like a beach combing detectorist is too hilarious to not be true.
Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2
#178Earlier quoted context omitted.
Time to invest in lead futures?
Or buy car batteries while they're still affordable. Lead is less abundant in the Earth's crust than cobalt or neodymium, or even lanthanum.
Now maybe we can finally get members to pitch in raking the copper and lead filled backstop at the local shooting range.. :)
Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2
#179Earlier quoted context omitted.
> 1) it takes a undergrad to make and measure a superconductor by a Nobel laureate to explain it. Another example of Taleb’s idea that experimentation comes first and theories second. Universities pretend that it’s the other way around but apart from an Einstein it’s usually not.
Not possible. Theory comes first. Scientists need a theory first to know which experiments to do. Any interesting experimental results are interesting precisely because they do not conform to the existing theories. Edit: here's a decent writeup to show what I mean https://en.wikipedia.org/wiki/Theory-ladenness
The most exciting phrase to hear in science, the one that heralds new discoveries, is not “Eureka!” (I found it!) but “That’s funny …”
— Isaac Asimov
Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2
#180Earlier quoted context omitted.
Note that the resistance of superconductors is 0 only for DC currents. The AC resistance is not 0 and typically gets larger for higher frequencies!
Yes, but computer chips are powered by DC.
Even on the DC input which ostensibly isn't doing anything it will probably be wiggling around a lot. You can attack electronic safes by analyzing the power draw into their computer as you type into