15 Feb
2001
15 Feb
'01
10:38 a.m.
In case anyone cares it seems to work OK, I was able to boot RT-11, though I
think I'm going to have to take a keyboard with me to plug in so that I'll
have a keypad!
BTW, I think the Wireless Ethernet I got with it is going to be pretty cool.
Definitly be handy for my wife so she doesn't have to risk life and limb by
entering the computer room :^)
Zane
15 Feb
15 Feb
11:33 a.m.
BTW, I think the Wireless Ethernet I got with it is
going to be pretty cool.
Definitly be handy for my wife so she doesn't have to risk life and limb by
entering the computer room :^)
As a medical student, I shudder to think how much RF is pumped through such
a device. The bandwidth one device was managing made me wonder if standing
in front of it would start to burn a hole through my abdomen.
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- Gravity is a myth. The Earth just sucks. -----------------------------------
1:09 p.m.
New subject: OT: RF (was: RE: E11/WinME results....)
> As a medical student, I shudder to think how much
RF...
Hey, any information to export to us non-Med guys as
to how bad RF really is? I don't believe that the last
has been heard on the subject of CellPhones. There is so
much pressure to go wireless on everything right now.
Q: What Wavelengths and Wattages are known to really
be dangerous? What is the Frequency of a Microwave
oven, for example (900 Mhz? <g>). How much less
dangerous is a signal of 1/2 that, etc... I have
seen almost nothing scientific written on this subject
and want to know more.
John A.
1:25 p.m.
New subject: OT: RF (was: RE: E11/WinME results....)
Q: What Wavelengths and Wattages are known to really
be dangerous? What is the Frequency of a Microwave
oven, for example (900 Mhz? <g>). How much less
dangerous is a signal of 1/2 that, etc... I have
seen almost nothing scientific written on this subject
and want to know more.
The new 802.11D devices like I've got operate at 2.4Ghz because
1) its easy to do spread spectrum there
2) its the same frequency as most microwave ovens so the spectrum
is considered 'junk.'
The note with the card said, "do not operate closer than 2.5" to your skin
for extended periods of time." No definition of 'extended' as far as I
could tell. Now the microwave is 500 - 750 watts I believe and this thing
is less than 2 so we're not talking about roasting here.
--chuck
1:31 p.m.
New subject: OT: RF (was: RE: E11/WinME results....)
On Thu, 15 Feb 2001, Chuck McManis wrote:
The new 802.11D devices like I've got operate at
2.4Ghz because
You mean 802.11b, right?
The note with the card said, "do not operate
closer than 2.5" to your skin
for extended periods of time." No definition of 'extended' as far as I
could tell. Now the microwave is 500 - 750 watts I believe and this thing
is less than 2 so we're not talking about roasting here.
The FDA has established microwave radiation exposure levels greater than
5mw/cm2 to be dangerous. The cards emit max about 200mw. I don't
remember how that drops off with distance (drops off with distance^2,
doesn't it?).
-- Doug
2:23 p.m.
New subject: OT: RF (was: RE: E11/WinME results....)
Chuck McManis wrote:
No, more of a slow-cooker. :)
By the way, ANSI has a standard for RF exposure limits. I don't recall
the std. number offhand but it shows that certain frequencies are likely to
affect certain body parts, so it's not a simple case of more dangerous
as the frequency goes higher (or lower.) For example, 1.2 Ghz is
about right for heating the vitreous fluid in the eyeball, and so exposure
to 1.2 Ghz should always be kept away from the eyes to prevent possible
vision damage. I think other frequencies are also bad for different organs.
Apparently, it's the heating effect of RF that tends to do the most damage
until the frequency gets quite high.
-- Ross
Q: What
Wavelengths and Wattages are known to really
be dangerous? What is the Frequency of a Microwave
oven, for example (900 Mhz? <g>). How much less
dangerous is a signal of 1/2 that, etc... I have
seen almost nothing scientific written on this subject
and want to know more.
The new 802.11D devices like I've got operate at 2.4Ghz because
1) its easy to do spread spectrum there
2) its the same frequency as most microwave ovens so the spectrum
is considered 'junk.'
The note with the card said, "do not operate closer than 2.5" to your skin
for extended periods of time." No definition of 'extended' as far as I
could tell. Now the microwave is 500 - 750 watts I believe and this thing
is less than 2 so we're not talking about roasting here.
--chuck
5:03 p.m.
New subject: OT: RF (was: RE: E11/WinME results....)
At 05:23 PM 2/15/01 -0800, you wrote:
By the way, ANSI has a standard for RF exposure limits.
I don't recall
the std. number offhand but it shows that certain frequencies are likely to
affect certain body parts, so it's not a simple case of more dangerous
as the frequency goes higher (or lower.) For example, 1.2 Ghz is
about right for heating the vitreous fluid in the eyeball, and so exposure
to 1.2 Ghz should always be kept away from the eyes to prevent possible
vision damage.
-- Ross
Yes, eyeballs are an issue, because (1) just a few degrees of hyperthermia
are enough to cause opacity (think cooked egg whites), (2) unlike the
hand, the eyes aren't especially well equiped with temperature sensing
nerve terminations, (3) unlike the skin, the eye doesn't have an
automatic cooling mechanism (sweating). In industrial accidents
involving microwave ovens, it is usually the eyes that go.
I have a working magnetron next to me that I've been tempted to
experiment with for a while. What would happen if you use the
interior of a working PC as a resonant cavity? :-) .
carlos.
16 Feb
16 Feb
7:19 a.m.
New subject: OT: RF (was: RE: E11/WinME results....)
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15 Feb
15 Feb
4:47 p.m.
New subject: OT: RF (was: RE: E11/WinME results....)
>As a medical student, I shudder to think how much
RF...
Hey, any information to export to us non-Med guys as
to how bad RF really is? I don't believe that the last
has been heard on the subject of CellPhones. There is so
much pressure to go wireless on everything right now.
Everyone and their brother have their own ideas. Everyone agrees that
low-wavelength, high-energy radiation is Bad For You even in small doses
(just that X-rays, for example, are worth the imperceptible risk in the
very fast blasts they're administered), but obviously low-energy rad
carries no acute problems and there's no hard longitudinal data on what
happens during extended exposure because it's so difficult to control
for, not to mention quantify. So it's all conjecture.
I don't like cell phones for a totally different reason: I don't want
people calling me at all hours of the day. :-)
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- Put your Nose to the Grindstone! -- Plastic Surgeons-Toolmakers Union Ltd. -
4:49 p.m.
New subject: OT: RF (was: RE: E11/WinME results....)
RF at around 2.2-2.6 GHz (typical microwave oven freqs) will warm
living tissues. There are tables listing the complex transmission
impedance of say, chicken, at those frequencies :-) .
_So far_, other than the heating effect, nothing
_scientifically conclusive_ can be said about whether that
will increase your odds of developing cancer. The same can be said
about exposure to AC magnetic fields at power line frequencies.
Again, _so far_. But lots of studies have been done, so if there
was a strong link it would have been discovered by now.
http://www.mcw.edu/gcrc/cop/powerlines-cancer-FAQ/toc.html
Carlos.
At 07:09 PM 2/15/01 -0500, you wrote:
> As a medical student, I shudder to think how
much RF...
Hey, any information to export to us non-Med guys as
to how bad RF really is?
Q: What Wavelengths and Wattages are known to really
be dangerous? What is the Frequency of a Microwave
oven, for example (900 Mhz? <g>). How much less
dangerous is a signal of 1/2 that, etc... I have
seen almost nothing scientific written on this subject
and want to know more.
John A.
8558
days inactive
8559
days old
9 comments
8 participants
participants (8)
-
ard＠p850ug1.demon.co.uk -
cmcmanis＠mcmanis.com -
cmurillo＠emtelsa.multi.net.co -
dogbert＠mindless.com -
doug＠blinkenlights.com -
healyzh＠aracnet.com -
John.Allain＠Donnelley.InfoUSA.Com -
spectre＠stockholm.ptloma.edu