451–460 of 501 posts
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Nonsense. There's nothing incomplete about our model for lift on airplanes.
Oh really, so why do the Navier-Stokes equations work?
If you're asking how to derive the Navier-Stokes equations, use continuum / conservation principles.
So what kinds of cool stuff could be built with a room temperature superconductor? Better levitating trains?
Nuclear fusion much easier, quantum computing, lossless electricity transmission, insane batteries. Dirt cheap MRIs, Basically welcome to the Jetsons. Much easier to mitigate climate change to the point where we can just deal with it.
Why do you think any of these are true?
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I’m just thinking aloud here but would this enable actual perpetual motion machines? For instance, wouldn’t the pushback from the quantum locked superconductor be an infinite source of energy?
In the same way that the pushback from the earth you're standing on is an infinite source of energy
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“Both papers present similar measurements” I’m not a physicist expert of superconductors, although I’ve followed quite closely that field since the ‘90s. But if the measurements are similar and correct and if the video of lk-99 levitating above a magnet demonstrating the Meissner effect is not fake, I don’t really have an alternative explanation to account for all of that. I guess that we’ll see what happens in the n…
This guy is live tweeting his attempt to reproduce https://twitter.com/andrewmccalip/status/1684433849781202944
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This dialogue is reminiscent of rec.bycycles.tech arguments with Jobst, ca 1993. A bike wheel is a linear elastic system, that can be thought of as a superposition of a uniformly set of tensioned spokes as one state, and a set of spokes in compression in the loaded zone (bottom of the wheel) as the other state. So long as the superposition of the two states obeys the limiting conditions (i.e. spokes in tension) they…
And thread. Thereby proving my point: Almost nobody knows how bicycle wheels actually work.
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This is true, but from personal experience, academics are terrible at including high quality images. My colleague would screenshot an image from some visualisation software and paste it in to her paper in MS Word. Then that image would get copied or screenshotted into a different word document, and so on, and the quality would deteriorate.
My wife is an academic and I often see her screenshoting to move an image from one document to another. Seems like a UI failure that the system can't detect this use case and move high quality backing images through the clipboard.
It's non-trivial to implement that for something like SVG's, but if UI developers had anticipated this use case, we might have gotten a remedy with the introduction of raster graphics.
I see a few comments saying this can also be used to "solve" climate change, but I am trying to understand the how. Do people mean that the world will have less carbon footprint overall because everything will be much more efficient?
I think it may be that electrical power could be generated in places where (carbon free) energy production can be abundant but consumption is low (e.g. Solar power in the Sahara desert) and then transported with almost no losses to sites of high energy consumption (e.g. the cities of North Africa and Europe).
Electricity would be cheaper and more plentiful than water in many areas.
If this material does just what they say it does, what would it revolutionise? Or as the article talks about, is this just a pointer at other possibilities that would be the real game changers?
Here's a few from the top of my head: - A global power net. No solar power during the night? Just produce it on the other side of the planet. - A superconducting computer. Less resistance when pushing bits around = 500x less power consumption. - A Superconducting magnetic battery. Store power indefinitely with high efficiency.
This sounds like it has interesting ramifications for global politics. At the beginning of the Ukraine war, one major lever the Russian government had was to enable blackouts in Ukraine. Makes you wonder how a global power network could work in light of international conflict.
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I want ONE breakthrough like this in my lifetime. Something completely game changing.
Live to see SPARC turn on, there are some pretty smart people with models actually showing it breaking Q>3. Turns out the hardest part about productive fusion is the sustained high compression, and HTC tape really helps increase the compression by a large amount. (See their 20 Tesla test at the start of the pandemic)