Recent content by vabamyyr

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...

Thank you DaleSpam for your reply.

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...

thank you DaleSpam

does that mean when I repeatedly let the magnet pull the rod and me pulling it back ultimately reduce the field strength to 0?

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...

thank you for the answer

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?

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?

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

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.

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...

i have dealt with sup but not with inf but i will look them up. Thx anyway.

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

Hi, everybody I was wondering if someone studies (has studied) Medical Engineering and Physics in Master program in King's College, London. I would appreciate if he or she commented the program, give some opinion what it is like to study there, is the program difficult and intense, exams etc...