Terry Given said:
And lets not forget that most real materials are inhomogeneous and
anisotropic. Why do you think FEA is so widely applied in
electromagnetics? because, when considering anything other than
geometrically well conditioned systems (eg toroid), this stuff gets
seriously complex. Alas the authors of textbooks often deliberately pick
such technical "straw men" to demonstrate how "easy" it is to solve
Maxwells equations, thus leading the gullible to the erroneous
conclusion its all easy stuff.
It is also interesting that you firstly asked for:
when of course its all just Maxwells equations. Perhaps some basic
electromagnetism texts would be a good start. And pretty much all of the
so-called "high frequency stuff" is the *same* as the low-frequency
stuff - its just that Cu skin depth is around 10mm at 50/60Hz (which is
one of the reasons that AC line voltages increase as power levels go up)
I do not see the relevance of the copper skin depth here. Are you talking about the excitation of
the what, ions in the brain? I am not sure of that. It's my understand that 10 mm is perhaps enough
to change human metabolism for bone healing and that brain cells don't need much current to be
provoked. In fact picoamperes might do nicely.
I know in the literature you fellows use there is a lot of talk of Cu skin depth. Is copper the
culprit with electromagnetism radiation then? It's interesting but what has this to do with the
power law I was referring to? I was not referring to invasively entering the body.
You are talking about 10mm and I have measured the ELF at 100 meters! So this kind of boggles my
poor brain what you are referring to. Aha, 5 GHz is very low invasively then, that is what you are
referring to? Most likely. Nothing stops ELF short of nu-metal, Faraday cages, and so on. Okay, we
are talking at cross purposes but the basic equations are the same, fine.
Terry (neither drunk nor trolling)
Thanks, I was worried.
I was what, glad to read that it is the same stuff. This is what I suspected
but I have only personally played with, tested, and messed around with
mostly 60 Hz electromagnetic radiation.
I have used the simple power law of 1/r or 1/r[2]squared or 1/r[3]cubed.
It works. I have also seen that taking two lines I can cancel out the radiation
to a large degree because the phase of the waves do cancel each other out.
You know, the right hand rule in physics. High school stuff.
This is not trivial and not what the resident experts and geniuses say BUT
IT IS WHAT THE INDUSTRY HAS DONE TO MINIMIZE THE PROBLEM.
What industry?
Try electric blankets which no longer radiate as they used to.
How? They placed the wires together. It's so simple and safe and effective.
They were ELF generators placed right up against the body.
Not a good idea. And extraordinarily simple to completely well almost completely solve a problem
even if there was not a problem. I forget now. Pregnancies were one of the first indications. Not
getting pregnant, although you all could joke about that, but miscarriages.
Try schools where the children were getting headaches.
An engineer comes in and balances the fields by making sure the neutrals are done correctly.
This actually happened. Nothing complicated. Someone had separated the wires in the walls
unnecessarily when building the school. Just a case history that always stuck in my memory. An
electrician actually, not an engineer, just balanced the neutrals, not even knowing any of this
stuff.
And another thing that is not so funny are the blood disorders on those who work on high power
lines. Yes, electrocution is the first job danger. But the second are the medical issues which
Washington State once studied in detail, yes? You all should know about that.
I do not see why Maxwell has to be brought in here, but if you can direct me to a source, then
fine.
It's a simple power law.
I don't see what the fuss is about except what? Solutions should be as simple as they can be until
they are not correct.
ELF and what you all are discussing may follow the same laws, but the health problems are quite
different since ELF penetrates. I guess we were talking at cross purposes.
As Roger Penrose pointed out, it's amazing that humans ever understand anything anyone else says,
especially when I chime in
