>> ^juliovega914:

Alright, this is unbelievably fucking cool.
You guys might (not) remember the Meissner effect I posted earlier (http://videosift.com/video/The-Meissner-Effect-Awsome-physics) This is exactly the same effect.
The fundamental difference is that the superconductor in my vid is thicker than in this case. In this case, a 1 micron YBCO layer is deposited onto a sapphire wafer (probably through physical vapor deposition [http://www.youtube.com/watch?v=_a9Slv1T1UM, go to 3:15 if you want to skip to PVD])
When you deposit a thin film with PVD you will inevitably form small imperfections at the grain boundaries in the film, usually only nanometers wide. When brought down below the superconductive transition temperature (IE, liquid nitrogen temp), the magnetic field lines are able to penetrate these grain boundaries in discrete quantities (unlike the thicker superconductor) forming what they seem to be calling "quantum tubes". The superconductor pins the field lines into these quantum sized tubes, and the force required to distort the field lines is greater than the weight of the superconductor.
Read this for a bit more: http://www.quantumlevitation.com/levitation/The_physics.html, but it doesn't seem terribly well translated, and it cant seem to decide how layman's terms it wants to be.


I didn't think that PVD would form YBCO.
I could easily be wrong though--my knowledge is out of date.

Great video about the Meissner Effect.

Alright, this is unbelievably fucking cool.

You guys might (not) remember the Meissner effect I posted earlier (http://videosift.com/video/The-Meissner-Effect-Awsome-physics) This is exactly the same effect.

The fundamental difference is that the superconductor in my vid is thicker than in this case. In this case, a 1 micron YBCO layer is deposited onto a sapphire wafer (probably through physical vapor deposition [http://www.youtube.com/watch?v=_a9Slv1T1UM, go to 3:15 if you want to skip to PVD])

When you deposit a thin film with PVD you will inevitably form small imperfections at the grain boundaries in the film, usually only nanometers wide. When brought down below the superconductive transition temperature (IE, liquid nitrogen temp), the magnetic field lines are able to penetrate these grain boundaries in discrete quantities (unlike the thicker superconductor) forming what they seem to be calling "quantum tubes". The superconductor pins the field lines into these quantum sized tubes, and the force required to distort the field lines is greater than the weight of the superconductor.

Read this for a bit more: http://www.quantumlevitation.com/levitation/The_physics.html, but it doesn't seem terribly well translated, and it cant seem to decide how layman's terms it wants to be.

What I do for a living and what I do in my bedroom are polar opposites...

>> ^AgentSmith:

>> ^MonkeySpank:
I don't understand how this works. I read the articles and I am a little skeptical. I've designed fMRI and DTI algorithms for years and I don't see why they keep talking about fMRI and brain waves. fMRI is an activity map that is related to the hot spots in the brain where the hydrogen protons aligned by the magnetic field resonate to the frequency of the emitter (TR/Echo Time) and only show consumption of glucose (hydrogen protons motility) during a designed paradigm, which in this case would be having the subject watch a video. Diffuse Tensor Imaging will help map the neurons going there in case a surgical procedure is necessary, and that's about it. Extrapolating fMRI (a very coarse k-space reconstruction) to brainwaves (an EEG signal) and images sounds very suspicious to me, and nothing published so far explains how this is technically done. I understand the excitement and it certainly would be possible in the future, but under the current state of the art, I don't see how this is possible, especially with fMRI or Fractional Anisotropy.

...says "MonkeySpank", lol! Really, thank you for the insight, but the association between your well informed comment and your avatar is what did it for me.
This is what led me to believe that E = MC² --LoudBelcher78

>> ^MonkeySpank:

I don't understand how this works. I read the articles and I am a little skeptical. I've designed fMRI and DTI algorithms for years and I don't see why they keep talking about fMRI and brain waves. fMRI is an activity map that is related to the hot spots in the brain where the hydrogen protons aligned by the magnetic field resonate to the frequency of the emitter (TR/Echo Time) and only show consumption of glucose (hydrogen protons motility) during a designed paradigm, which in this case would be having the subject watch a video. Diffuse Tensor Imaging will help map the neurons going there in case a surgical procedure is necessary, and that's about it. Extrapolating fMRI (a very coarse k-space reconstruction) to brainwaves (an EEG signal) and images sounds very suspicious to me, and nothing published so far explains how this is technically done. I understand the excitement and it certainly would be possible in the future, but under the current state of the art, I don't see how this is possible, especially with fMRI or Fractional Anisotropy.


...says "MonkeySpank", lol! Really, thank you for the insight, but the association between your well informed comment and your avatar is what did it for me.

This is what led me to believe that E = MC² --LoudBelcher78

I don't understand how this works. I read the articles and I am a little skeptical. I've designed fMRI and DTI algorithms for years and I don't see why they keep talking about fMRI and brain waves. fMRI is an activity map that is related to the hot spots in the brain where the hydrogen protons aligned by the magnetic field resonate to the frequency of the emitter (TR/Echo Time) and only show consumption of glucose (hydrogen protons motility) during a designed paradigm, which in this case would be having the subject watch a video. Diffuse Tensor Imaging will help map the neurons going there in case a surgical procedure is necessary, and that's about it. Extrapolating fMRI (a very coarse k-space reconstruction) to brainwaves (an EEG signal) and images sounds very suspicious to me, and nothing published so far explains how this is technically done. I understand the excitement and it certainly would be possible in the future, but under the current state of the art, I don't see how this is possible, especially with fMRI or Fractional Anisotropy.

I had to listen again--Ha, you're right!

>> ^MarineGunrock:

Anyone else thinks this sounds like @dag?

Thanks O!

In reply to this comment by oritteropo:
*quality

>> ^shinyblurry:

Well, I am talking about supernatural causes. I think there is plenty of evidence the Universe was designed, for instance the 20 or so values which life is completely dependent on and the fact that if any of them were altered in the most infintesimal way, life wouldn't exist and in most cases, the Universe wouldn't either. Even Dawkins admitted that the Universe appeared designed. But then he goes on to posit multiple Universes and we just happen to be in the one that appears designed. Instead of investigating the obvious conclusion that if the Universe appears designed, then maybe it is, he comes up with a morass of complexity and speculation which doesn't reduce the need for an ultimate cause in the first place. I think peoples predisposition against a created Universe is predicated more on their bias against a Creator than logic and reason, because I really don't see how it is at all unreasonable or illogical to believe it could have been.
btw, why downvote my comment and then engage in discussion?
>> ^kceaton1:
@shinyblurry

You missed the part were he talked about the quantum foam, etc... The Universe had a beginning the same way your life did. There was a lot that happened before most likely and we may never know what it was (as the quantum foam breaks things down to, literally, chances/glimpses and "something from nothing"; as long as the dime lands head up in your favor in one instance in some far off day; even if your chances are one in 1 x 10^464th power--it just needs one instance in an endless amount of time too happen).



The downvote was for fanning religious vs. science potentials, I saw it as a troll to some degree.

For the rest. Science is a poor man's science, especially nowadays when you use twenty-twenty hindsight. The reason I say this is that you use "the chance for "x" factor ending up in some various fashion by chance" and explain that it is ludicrous for that to be true. The point scientists make is that you don't need chance at all to get there, or if you did it doesn't matter, because that is were the dice landed. Complaining that the dice are improbable, you should also notice besides those 20 reasons you could just as easily make it into a scenario of 500 clauses.

Like not having a super massive black hole near us, or an old dying star near us ready to go up, a large gas planet near us that could play amok with our magnetic field and send loads of radiation at us, etc...

It's much easier to approach it as the dice dropped where they may and that designed our perceived reality.


Last part concerning time. Time if perceived by a slow to register memory system will appear to be going slow, if at the speed of light it would essentially stop. The point I was making is that the Universe has it's own built in clock via thermodynamics and the theory of general relativity. If time TRULY doesn't exist then neither can heat, if heat doesn't exist, neither can electrons, if electrons don't exist then neither do atoms, etc... Time is a fundamentally linked "existence" merely due to the other forces at play that need it to work at all, including the supreme particle/wave, the photon. How can it be a wave without some time variable. What causes time and what it is exactly is still best answered by Einstein and his theory of General Relativity.

The Meissner effect is the expulsion of a magnetic field from a superconductor during its transition to the superconducting state. Walther Meissner and Robert Ochsenfeld discovered the phenomenon in 1933 by measuring the magnetic field distribution outside superconducting tin and lead samples.[1] The samples, in the presence of an applied magnetic field, were cooled below what is called their superconducting transition temperature. Below the transition temperature the samples canceled nearly all magnetic fields inside. They detected this effect only indirectly; because the magnetic flux is conserved by a superconductor, when the interior field decreased the exterior field increased. The experiment demonstrated for the first time that superconductors were more than just perfect conductors and provided a uniquely defining property of the superconducting state.
-wikipedia

>> ^Ornthoron:

>> ^deathcow:
I put a big aluminum bar directly in one once, and got to move it around... its weird. Even aluminum responds.

Not in the same way as iron, though. Aluminum is not ferromagnetic, and is therefore not attracted to the MRI magnet. But if you move it around in the magnetic field you will induce an electrical current in the aluminum. This electrical current sets up its own small magnetic field, and it's this new field's interaction with the field from the MRI that you can feel when you move the bar around. The interaction stops as soon as you hold the bar still again.


Awesome reply. Your science embiggens my mind.

>> ^Ornthoron:

>> ^deathcow:
I put a big aluminum bar directly in one once, and got to move it around... its weird. Even aluminum responds.

Not in the same way as iron, though. Aluminum is not ferromagnetic, and is therefore not attracted to the MRI magnet. But if you move it around in the magnetic field you will induce an electrical current in the aluminum. This electrical current sets up its own small magnetic field, and it's this new field's interaction with the field from the MRI that you can feel when you move the bar around. The interaction stops as soon as you hold the bar still again.


Thanks! interesting.

Oh, and this is a 4 tesla magnet. In my field of research, I work with magnetic fields up to 14 tesla. But not on such a big scale as here.

>> ^deathcow:

I put a big aluminum bar directly in one once, and got to move it around... its weird. Even aluminum responds.

Not in the same way as iron, though. Aluminum is not ferromagnetic, and is therefore not attracted to the MRI magnet. But if you move it around in the magnetic field you will induce an electrical current in the aluminum. This electrical current sets up its own small magnetic field, and it's this new field's interaction with the field from the MRI that you can feel when you move the bar around. The interaction stops as soon as you hold the bar still again.

"SOHO watched as a fairly bright comet dove towards the Sun in a white streak and was not seen again after its close encounter (May 10-11, 2011). The comet, probably part of the Kreutz family of comets, was discovered by amateur astronomer Sergey Shurpakov. In this coronagraph the Sun (represented by a white circle) is blocked by the red occulting disk so that the faint structures in the Sun's corona can be discerned. Interestingly, a coronal mass ejection blasted out to the right just as the comet is approaching the Sun.

Scientists, however, have yet to find a convincing physical connection between sun-grazing comets and coronal mass ejections. In fact, analysis of this CME using images from the Solar Dynamics Observatory shows that the CME erupted before the comet came close enough to the solar surface to interact with strong magnetic fields."

Technically everything is magnetic due to the main force sharing electricity (electromagnetism; yes, if Magneto was much more intelligent he would own [pwn] everything). If you were in a high enough magnetic field you'd die as nerve conduction might "flip" or go weird directions. It's be one hell of a way to go and you'd have to be by something like the Sun to do it. Lastly, remember that as Oxygen becomes cooler it becomes superconducting.

Of course the other particles forced into the magnetic loops will kill you outright FAR before the magnetism.

/Seriously, someone needs to tell him white fro's are out, man. I keep thinking it's Shepard Book.