XPost: sci.electronics.design   
   From: bill.sloman@ieee.org   
      
   On 20/02/2026 9:35 pm, J. J. Lodder wrote:   
   > Bill Sloman  wrote:   
   >   
   >> On 20/02/2026 7:41 am, J. J. Lodder wrote:   
   >>> wBill Sloman  wrote:   
   >>>   
   >>>> On 20/02/2026 12:13 am, J. J. Lodder wrote:   
   >>>>> Bill Sloman  wrote:   
   >>>>>   
   >>>>>> On 19/02/2026 9:56 pm, J. J. Lodder wrote:   
   >>>>>>> Bill Sloman  wrote:   
   >>>>>>>   
   >>>>>>>> On 19/02/2026 7:49 am, Ross Finlayson wrote:   
   >>>>>>>>> On 02/18/2026 12:43 PM, Python wrote:   
   >>>>>>>>>> Le 18/02/2026 à 20:13, Ross Finlayson a écrit :   
   >>>>>>>>>> ..   
   >>>>>>>>>>> and, you know, magnetic monopoles, is widely employed   
   >>>>>>>>>>> in medical imaging and the like.   
   >>>>>>>>>>   
   >>>>>>>>>> No.   
   >>>>>>>>>   
   >>>>>>>>> Resonance imaging (NMR) is a thoroughly different mechanism   
   >>>>>>>>> than Roentgen rays.   
   >>>>>>>>   
   >>>>>>>> But as the name implies, it's nuclei of the atoms involved that   
   >>>>>>>> exhibit the resonance. It's a remarkably low energy effect, and you   
   >>>>>>>> need remarkably high magnetic fields to get it to give you a   
   >>>>>>>> detectable signal.   
   >>>>>>>   
   >>>>>>> Nevertheless, it is easily demonstrated in the kitchen   
   >>>>>>> with some simple electronics.   
   >>>>>>   
   >>>>>> Sort of.   
   >>>>>>   
   >>>>>> https://en.wikipedia.org/wiki/Nuclear_magnetic_resonance   
   >>>>>>   
   >>>>>> There are lots of different ways to exploit nuclear magnetic resonance.   
   >>>>>> The earth's magnetic field is high enough to let you devise experiments   
   >>>>>> that can demonstrate the effect on a kitchen table.   
   >>>>>   
   >>>>> Nothing 'sort of'.   
   >>>>> You -can- easily demonstrate the effect on the kitchen table.   
   >>>>> (at audio frequencies)  Wikipedia is right here.   
   >>>>   
   >>>> Yes, but we were talking about medical imaging, not nuclear magnetic   
   >>>> resonance in general, and your assertion is the irrelevance here, as the   
   >>>> text you snipped pointed out.   
   >>>   
   >>> Which 'we' dear Bill?   
   >>   
   >> If you can't work that out, you aren't worth talking to.   
   >>   
   >>> I replied to your   
   >>> ===   
   >>>>>>> But as the name implies, it's nuclei of the atoms involved that   
   >>>>>>> exhibit the resonance. It's a remarkably low energy effect, and you   
   >>>>>>> need remarkably high magnetic fields to get it to give you a   
   >>>>>>> detectable signal.   
   >>> ===   
   >>> which is just plain wrong.   
   >>   
   >> In your ever-so-authoritative opinion.   
   >>   
   >>> As a matter of fact, zero to ultra-low frequency NMR   
   >>> is a flourishing research field these days,   
   >>   
   >> It's cheap to do, so lots of graduate students get stuck with studying   
   >> it. The results of their research don't seem to get published in   
   >> high-impact journals.   
   >   
   > It is an interesting field of research,   
   > because with all external fields screened out   
   > you can investigate the spin-spin couplings. [1]   
   > (among other things).   
      
   That [1] implies that you meant to cite an example. What happened?   
   You couldn't find one?   
      
   And who is going to care about spin-spin couplings?   
   I've seen some daft research projects but there's usually been at least   
   the remote chance of some sort of real world advantage in prospect.   
      
   --   
   Bill Sloman, Sydney   
     .   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)