Yes I remember, but I was not familiar enough with magnetic levitation to appreciate that his configuration defied conventional expectations. Sometimes it can be a struggle to find an audience that is knowledgeable enough to see the significance of a novel observation performed with rudimentary tools.
Harry On Sat, Oct 21, 2023 at 11:35 AM Terry Blanton <hohlr...@gmail.com> wrote: > Congratulations! > > Here is the rest of the article behind the paywall: > > There is a simple way to levitate magnets – and physicists are beginning > to understand how it works. The technique could have applications in > robotics in the future. > In 2021, Hamdi Ucar > <https://archive.ph/o/YlYcK/https://www.researchgate.net/profile/Hamdi-Ucar> – > then at Göksal Aeronautics in Turkey – posted a YouTube video showing two > magnetic spheres levitating on either side of a rapidly spinning bar magnet > that was positioned with its north-south poles vertically. Ucar also > published a paper on the phenomenon, which attracted the attention of Rasmus > Bjørk > <https://archive.ph/o/YlYcK/https://orbit.dtu.dk/en/persons/rasmus-bj%C3%B8rk> > at > the Technical University of Denmark. > With a colleague, Bjørk decided to replicate Ucar’s levitation technique. > “We sat down for … > half an hour and tried. I was like, it’s completely out of the question, > it simply shouldn’t work. And then it just worked. We were completely > baffled by this,” he says. > Read more > Extremely cold drop of helium can be levitated forever > > <https://archive.ph/o/YlYcK/https://www.newscientist.com/article/2377034-extremely-cold-drop-of-helium-can-be-levitated-forever/> > Now Bjørk and several other colleagues, all at the Technical University of > Denmark, think they understand what’s going on. > They started with Ucar’s set up where a “floater” magnet levitates > <https://archive.ph/o/YlYcK/https://www.newscientist.com/article/2251277-magnetic-levitation-can-be-used-to-separate-the-living-from-the-dead/> > when > placed on top of another magnet that is spinning hundreds of times every > second. Then they tested a range of spinning frequencies and floater sizes > while filming the magnets and measuring their magnetic fields. The > researchers also developed a computer simulation of the experiment. > Frederik Durhuus > <https://archive.ph/o/YlYcK/https://orbit.dtu.dk/en/persons/frederik-laust-durhuus> > who > worked on the project says it is the rotation that is key to the process. > He says many people are familiar with the way two magnets repel each other > when held with both north poles (or both south poles) close together. But > usually, one of the magnets will then simply flip over, meaning that a > north and south pole are close together – at which point the two magnets > stick to each other. > Durhuus says rotation counters that magnetic “flipping” and keeps the > floater levitating. He compares it to the way a spinning top > <https://archive.ph/o/YlYcK/https://www.newscientist.com/article/2351110-spectacular-liquid-fractal-generated-by-a-submerged-spinning-top/> > counters > the downward pull of gravity and spins for longer than we might expect. > Ucar’s experiments show that the effect can persist even when the > rotating magnet is oriented horizontally > <https://archive.ph/o/YlYcK/https://www.youtube.com/watch?v=6TGn1IjbjP8&ab_channel=Sudanamaru(H.Ucar)>, > rather than vertically like a spinning top. He disagrees with some details > of the team’s numerical and theoretical models, but he says that their > independent validation of this surprising effect is important. > “I don’t think we will be able to make any [magnetically levitating] > trains with this anytime soon, but it will be interesting to see where it > can be useful because it does not require very fancy equipment,” says Joachim > Hermansen > <https://archive.ph/o/YlYcK/https://orbit.dtu.dk/en/persons/joachim-marco-hermansen> > who > was also part of the team. > Marcel Shuck > <https://archive.ph/o/YlYcK/https://notouchrobotics.com/%23team> at > No-Touch Robotics in Switzerland says that magnets are already used for > suspension and transport of objects in some industries. He says that using > the rotation scheme could be a simpler alternative to systems that require > constant readjustment of magnets. > Journal reference > *Physical Review Applied* DOI: 10.1103/PhysRevApplied.20.044036 > <https://archive.ph/o/YlYcK/https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.20.044036> > > On Sat, Oct 21, 2023 at 11:21 AM Hamdi Ucar <jxu...@gmail.com> wrote: > >> Yeah, I knew such a thing will be published but not good as this. My name >> and a link is shown in first sentences so everybody can check it without >> pay-wall. Still dont know what is written at the remaining. >> This event makes my article access stats as hockey stick. Fantastic! It >> it also shown at >> https://news4republicans.com/science/mysterious-rotation-trick-makes-magnets-float-in-the-air/ >> so it is matter of time that Elon to become aware of it :) >> >> I am no longer subscribed to Vortex-l. I dont know...but nobody there >> interested on that and did not considered that this mechanism might be >> present in nuclei. If so we can learn too much about the strong nuclear >> force and play with nucleons like chemistry. >> >> This event comes as honeymoon! >> >> Hamdi >> >> >> On Sat, Oct 21, 2023, 18:00 Terry Blanton <hohlr...@gmail.com> wrote: >> >>> https://youtu.be/BikS8BbSvlM >>> >>> Terry >>> >>
