Recent content by vabamyyr

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    Graduate Integration by parts problem involving vector functions

    Hi, I am trying to chew through the proof of reciprocity in MRI. At some point I come across to the following expression: \Phi_{M}=\oint\vec{dl}\cdot\left[\frac{\mu_{0}}{4\pi}\int{d^{3}r'}\frac{\vec{\nabla'}\times\vec{M}(\vec{r'})}{\left|\vec{r}-\vec{r'}\right|}\right] Now it says that...
    • vabamyyr
    • Thread
    • Functions Integration Integration by parts parts Vector
    • Replies: 1
    • Forum: Calculus
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    Graduate MRI Safety: Question on Potential Burns

    Thank you DaleSpam for your reply.
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    Graduate MRI Safety: Question on Potential Burns

    Hi, MRI safety manual says that whenever you are scanning a patient with a certain surface coil you should remove all unplugged coils from the bore during the scan. For example, if you have a head/neck + spine coil matrix with two coil ports and you are scanning only the spine part then you...
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    Graduate Who or What is Doing Work on the Rod in a Superconducting MRI Magnet?

    thank you DaleSpam
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    Graduate Who or What is Doing Work on the Rod in a Superconducting MRI Magnet?

    does that mean when I repeatedly let the magnet pull the rod and me pulling it back ultimately reduce the field strength to 0?
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    Graduate Who or What is Doing Work on the Rod in a Superconducting MRI Magnet?

    Suppose I have a superconducting solenoid MRI magnet (cooled with liquid helium) producing a static magnetic field around it. I approach the magnet bore with a steel rod in my hand. The rod starts to pull towards the magnet and i have to work against the pull in order not to let it attach onto...
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    Graduate Understanding Cooper Pairs and Superconducting Materials

    thank you for the answer
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    Graduate Understanding Cooper Pairs and Superconducting Materials

    Hi, I have one question about superconducting materials. Do Cooper pairs form below critical temperature of material or do they form below critical temperature AND if the current exists?
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    Graduate Photoeffect and compton scattering

    yes, but still I don't understand why Compton effect involves free or loosely bound electrons and not electrons from inner shells. Can u enlighten me on that one?
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    Graduate Photoeffect and compton scattering

    The more I read this forum, especially topics concerning CE and PE I'm getting more and more confused.
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    Graduate Photoeffect and compton scattering

    sorry, i meant in case of CE it is not possible for photon to disappear (absorbed by electron) so it only gives some part of energy and momentum to electron which is sufficient to eject it from the atom.
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    Graduate Photoeffect and compton scattering

    I was asked question: "Why in case of photoelectric effect electrons closer to the atom are ejected and in case of Compton effect electrons in the outer shells are emitted from nucleus by x-ray photon?". Well I know that this topic is very deep and one has to carefully select words to explain...
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    Undergrad Does the Limit of 1/(3+(-1)^n) Exist?

    i have dealt with sup but not with inf but i will look them up. Thx anyway.
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    Undergrad Does the Limit of 1/(3+(-1)^n) Exist?

    I have a question: what is lim (n--->infinity)= 1/(3+(-1)^n))? My opinion that this limit does not exist.
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    Graduate Orthogonal transformation of matrix

    I have a question on matrix norms and orthogonal transformations. The 2-norm in invariant under orthogonal transformation, for if Q^T*Q=I. But i have trouble showing that for orthogonal Q and Q^H with appropriate dimensions || Q^H*A*Q ||2 =|| A ||2