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>> 1. You're standing in a 40 microtesla magnetic field right now.
>
> Can you charge a laptop with a 40 mecrotesla magnetic field?
Unlikely.
>> 2. You're surrounded by devices that produce far stronger magnetic fields.
>
> But far stronger than the suggested form of wireless energy transmission?
The document referenced (and similar reports I've seen) don't actually
go into just "how strong" this field actually is. Presumably it's quite
a bit more than 40 microtesla, but that's all I could tell you.
>> 3. Medical imaging scanners often generate fields of up to 3 T, yet show
>> no known negative effects on human health.
>
> They do so for relatively short periods of time, and humans are exposed
> to them once of twice. They are not generated for hours every single day
> with the same person present at all times.
How about the machine operator?
The magnet in an NMR machine is essentially a permanent magnet - you
don't "turn it on" just to do the scan, and then turn it off again. It
takes several days to charge up, and a similar time to shut it down
properly.
[You can actually buy 3 T magnets that fit in your pocket. The challenge
for an NMR machine is to make a field that's 3 T *all over*, or at least
in a space big enough to fit a person inside...]
>> 4. According to known physics, most physical materials are very weakly
>> affected my magnets.
>
> Yet a strong enough magnetic field can kill a human. (Sure, it has to
> be staggeringly strong, but it's possible.)
Really? That's news...
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
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Orchid XP v7 <voi### [at] dev null> wrote:
> >> 3. Medical imaging scanners often generate fields of up to 3 T, yet show
> >> no known negative effects on human health.
> >
> > They do so for relatively short periods of time, and humans are exposed
> > to them once of twice. They are not generated for hours every single day
> > with the same person present at all times.
>
> How about the machine operator?
Does the machine operator really stay in the same room as the NMR machine?
He has to use some buttoms? They separate the computers from the magnetic field,
don't they?
> The magnet in an NMR machine is essentially a permanent magnet - you
> don't "turn it on" just to do the scan, and then turn it off again. It
> takes several days to charge up, and a similar time to shut it down
> properly.
That's right, but people usually don't stay all day and night in NMR machines.
Nobody tried, nobody says it's dangerous. Perhaps it isn't, but might be pretty
boring. Boring enough to get hurt? :-)
No, I'm not talking about those things, some people do, when doing medications
with small magnetic fields ("as your blood contains iron and as everybody
knows, it has magnetic attribute" :-) ), but there aren't safety guides for the
use of NMR machines without reasons.
> >> 4. According to known physics, most physical materials are very weakly
> >> affected my magnets.
> >
> > Yet a strong enough magnetic field can kill a human. (Sure, it has to
> > be staggeringly strong, but it's possible.)
>
> Really? That's news...
We are not sure, if it really kills humans, as we never tried it. (I hope so)
But it has effects and a magnetic field strong enough is able to kill germs, as
a US patent proves.
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2Fsearch-bool.html&r=31&f=G&l=50&co
1=AND&d=ptxt&s1=4524079&OS=4524079&RS=4524079
But I don't conclude those magical magnetic fields are bad. :-)
bluetree
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Orchid XP v7 wrote:
>>> Sounds wonderful, but...
>>> I'm not sure if speakers or any magnetic device would work in such a
>>> strong
>>> magnetic field.
>
> Well, it's not a stationary field, and it's well outside the audio
> frequency range. And, indeed, if these dudes have out their science
> right, the field is virtually invisible to anything that doesn't
> resonate at just the right frequency.
>
> [Hmm, I wonder what happens when several homes have these, and their
> frequencies clash?]
>
>> Not to talk about pacemakers or the unknown long-term effects that can
>> have on human health.
>
> 1. You're standing in a 40 microtesla magnetic field right now.
>
> 2. You're surrounded by devices that produce far stronger magnetic fields.
>
> 3. Medical imaging scanners often generate fields of up to 3 T, yet show
> no known negative effects on human health.
>
> 4. According to known physics, most physical materials are very weakly
> affected my magnets.
>
> If you want to worry about something, worry about all those migrating
> animals which reputedly use the Earth's magnetic field to navigate with...
>
Frogs are generally not migrating animals, but they may influenced by
magnetic fields like in: http://www.hfml.ru.nl/pics/Movies/frog.mpg
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Gail Shaw wrote:
> Didn't Tesla claim to have discovered something like this?
Yes, and it worked too. You really could just plug stuff into the ground
and have it work.
--
Darren New / San Diego, CA, USA (PST)
It's not feature creep if you put it
at the end and adjust the release date.
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Nekar nous apporta ses lumieres en ce 2008/01/12 18:35:
> http://web.mit.edu/newsoffice/2007/wireless-0607.html
>
> Sounds wonderful, but...
> I'm not sure if speakers or any magnetic device would work in such a strong
> magnetic field.
>
> -Nekar
>
>
The field have a frequancy in the MHz range. You can't hear at those
frequancies, and the speakers are to heavy to react to them.
The field don't need to be very strong, maybe a few militeslas.
You already have magnetic induction kitchen ranges. Those with a glass like top
that you can put your hand on immediately after you remove the pan, or raise the
pan and leave your hand between the surface and the pan where you are cooking
something.
--
Alain
-------------------------------------------------
At least I thought I was dancing, 'til somebody stepped on my hand.
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In article <478a0fac$1@news.povray.org>, voi### [at] devnull says...
> > Yet a strong enough magnetic field can kill a human. (Sure, it has to
> > be staggeringly strong, but it's possible.)
>
> Really? That's news...
>
News to me too. Given that they are using magnetic fields that are
insanely bigger than those in a NMR to "float" frogs, without any
detrimental effect. One suspects that such a field would have to be a)
unidirectional and b) so immensely strong that its impractical to
produce it. Now, mind you, that doesn't mean that you can't produce
energy waves in **certain frequencies**, which could kill you, but then
those wouldn't be "magnetic", they would be microwave, or some other
class.
Fact is, the supposed "health effects" of magnetic fields, even absurdly
strong ones, including the ones used in MRI machines, which have to be
strong enough to at least magnetically align the metals in human tissue,
before letting them return to a normal state, both in the sense of
negative "and" positive effects, have been proven to be either require
some very specific conditions, or to have been total BS, and the
conditions resulting from other unknown factors (i.e. the supposed
cancer clusters some people reported near power lines, which only seemed
to happen at *some* such places, and never at all of them, nor with any
specific set of conditions that where a) identical in all places they
happened in, or b) uncommon to places where they never happened).
So, yeah, I would love to know how you "kill" someone with magnetism,
given that you could even set off a nuke and not kill anyone from the
EMP pulse, just from the radiation after (which isn't magnetic), to use
another example.
As for the resonance issue. It would be basically invisible to anything
that didn't resonate the same way. This isn't to say that, by shear
accident, they wouldn't have cases where unshielded electronics might
resonate at those frequencies, but you get that happening anyway, which
is why you get interference on some things. Correct shielding would
block it. And, anything else wouldn't react to it at all.
Oh, and while the 40 microtesla energy level can't be used to "charge"
anything, it might be, if you have a) a single resonant frequency,
instead of a hugely wild random fluctuation, and b) the electronics
where low enough power. Crystal radios used it, "all the time", having
no batteries, back before anyone had transistor radios, which draw more
power, so need batteries. Its not impossible, just not practical, for
most modern electronics.
--
void main () {
if version = "Vista" {
call slow_by_half();
call DRM_everything();
}
call functional_code();
}
else
call crash_windows();
}
<A HREF='http://www.daz3d.com/index.php?refid=16130551'>Get 3D Models,
3D Content, and 3D Software at DAZ3D!</A>
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Alain <ele### [at] netscapenet> wrote:
> Nekar nous apporta ses lumieres en ce 2008/01/12 18:35:
> > http://web.mit.edu/newsoffice/2007/wireless-0607.html
> >
> > Sounds wonderful, but...
> > I'm not sure if speakers or any magnetic device would work in such a strong
> > magnetic field.
> >
> > -Nekar
> >
> >
> The field have a frequancy in the MHz range. You can't hear at those
> frequancies, and the speakers are to heavy to react to them.
> The field don't need to be very strong, maybe a few militeslas.
> You already have magnetic induction kitchen ranges. Those with a glass like top
> that you can put your hand on immediately after you remove the pan, or raise the
> pan and leave your hand between the surface and the pan where you are cooking
> something.
lol
Did you already try to cook with your hand between pan and surface?
Also when the surface doesn't get hot, the pan gets, doesn't it, because of the
food,which you are cooking?
The content is hot, isn't it? (Cold food must taste bad)
bluetree
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bluetree nous apporta ses lumieres en ce 2008/01/14 11:38:
> Alain <ele### [at] netscapenet> wrote:
>> Nekar nous apporta ses lumieres en ce 2008/01/12 18:35:
>>> http://web.mit.edu/newsoffice/2007/wireless-0607.html
>>>
>>> Sounds wonderful, but...
>>> I'm not sure if speakers or any magnetic device would work in such a strong
>>> magnetic field.
>>>
>>> -Nekar
>>>
>>>
>> The field have a frequancy in the MHz range. You can't hear at those
>> frequancies, and the speakers are to heavy to react to them.
>> The field don't need to be very strong, maybe a few militeslas.
>> You already have magnetic induction kitchen ranges. Those with a glass like top
>> that you can put your hand on immediately after you remove the pan, or raise the
>> pan and leave your hand between the surface and the pan where you are cooking
>> something.
>
> lol
> Did you already try to cook with your hand between pan and surface?
> Also when the surface doesn't get hot, the pan gets, doesn't it, because of the
> food,which you are cooking?
> The content is hot, isn't it? (Cold food must taste bad)
>
> bluetree
>
>
The pan get hot and heat the food. There is a publicity where there is a fish
bowl, full with a swiming goldfish, on the surface, over it, there is a stand
holding a kettle full of boiling water...
And, no, I never tried as mine is a conventional one.
--
Alain
-------------------------------------------------
The other day I came home and a guy was jogging, naked. I asked "Why?" He
said "Because you came home early."
Rodney Dangerfield
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Alain <ele### [at] netscapenet> wrote:
> The pan get hot and heat the food. There is a publicity where there is a fish
> bowl, full with a swiming goldfish, on the surface, over it, there is a stand
> holding a kettle full of boiling water...
> And, no, I never tried as mine is a conventional one.
The poor goldfish!
Nobody ever examined, if those magnetic induction cookers might hurt its swim
bladder.
I hope they exposed it only a short time to that. ;-)
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bluetree nous apporta ses lumieres en ce 2008/01/14 16:23:
> Alain <ele### [at] netscapenet> wrote:
>> The pan get hot and heat the food. There is a publicity where there is a fish
>> bowl, full with a swiming goldfish, on the surface, over it, there is a stand
>> holding a kettle full of boiling water...
>> And, no, I never tried as mine is a conventional one.
>
> The poor goldfish!
> Nobody ever examined, if those magnetic induction cookers might hurt its swim
> bladder.
> I hope they exposed it only a short time to that. ;-)
>
Long enough to bring the water to boiling temperature, at least.
--
Alain
-------------------------------------------------
If you can’t get your work done in the first 24 hr’s, work nights.
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