Good point George. However I must point out blue tooth is much lower power at
least twice the frequency, close to microwave ovens (another can of worms).
Again I say this appears to be solicitation for a research grant.
Fred Townsend
DC to Light
Tang, George wrote:
By the way, the latest warning came from Dr. Ronald B. Herberman,
director of
the University of Pittsburgh Cancer Institute, talking to reporters on his
CELL PHONE via a Bluetooth headset. Dr. Herberman also recommended others to
do the same by using a wireless headset when talking on the cell. Now does
Dr. Herberman not understand that a wireless headset also has a transmitting
ANTENNA located right next to his HEAD and bombards his HEAD with EM WAVES?
Or is this just a bad commercial to sell wireless headsets?
Has he been paid to make these warnings?
George Tang
-----Original Message-----
From: Derek Walton [mailto:lfresea...@aol.com]
Sent: Friday, July 25, 2008 12:58 PM
To: Lothar Schmidt
Cc: Fred Townsend; Tang, George; IEEE EMC Discussion Group
Subject: Re: Another Cancer Scare?
Not wanting to appear silly, or spread rumors, but some of the thinking
behind the potential for EM cancers was explained to me as follows:
Cancers are mutant forms of normal cells. Such mutations occur when the
cell reproduces. That process is more likely in the young, or where
tissues are repairing. This is separate from cell damage through heating
most often being considered when power levels are discussed.
Part of the reproduction process is un-encoding the cell structure from
the DNA, and that is influenced by fields which if great enough cause
non intended cell structure. Usually the fields are magnetic because
they penetrate deeper into skin tissue.
Exposing non developing cells to fields would obviously never exhibit
problems. A huge level of research to date has done just that...
Other research is specifically looking at the influence on developing
cells, I'm not sure yet how much of that is public domain.
Again, I stress this comes from an aging guy... I may be remembering
incorrectly, or understood the explanation wrong.
We live in interesting times.
Cheers,
Derek Walton
L F Research
Lothar Schmidt wrote:
Just for clarification,
Cell phones with GSM technology transmit with 2W burst power @
850MHz
and with 1W burst power @1900 MHz
CDMA and WCDMA technology uses 200mW output power.
Regarding the influence of cell phones to a human being. My
opinion
is, that there are millions of cell phones used for so many
years by a
huge number of people and many of them seem to have the phone
glued to
the ear.
If there is any impact we should have seen a significant
increase in
certain areas like cancer. This didn't happen therefore I
believe the
influence is close to none.
Best Regards
*Lothar Schmidt**
*Director Regulatory & Antenna Services
*CETECOM Inc.*
411 Dixon Landing Road
Milpitas, CA 95035
Phone +1 (408) 586 6214
Fax +1 (408) 586 6299
email lothar.schm...@cetecomusa.com
<mailto:lothar.schm...@cetecomusa.com>
<mailto:lothar.schm...@cetecomusa.com>
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------------------------------------------------------------------------
*From:* emc-p...@ieee.org [mailto:emc-p...@ieee.org] *On Behalf
Of
*Fred Townsend
*Sent:* Friday, July 25, 2008 11:37 AM
*To:* Tang, George
*Cc:* Derek Walton; IEEE EMC Discussion Group
*Subject:* Re: Another Cancer Scare?
George, I'm no medical expert either but I think I understand a
few
laws of physics, Gauss's law, and Maxwell's equations in
particular.
If there is to be any effect on the human body, surely it must
be
directly from the magnetism or indirectly from the induced
currents.
To the best of my knowledge there never has been a demonstrated
effect
on the human body by magnetism. That leaves induced currents.
Many ham and commercial handy talkies (HT) can put out 5 watts.
When
used, the rubber ducky runs right by the face or ears. From
personal
experiments I can say looking directly at the sun causes a
noticeable
heating effect while using my 5 watt HT @ 146MHz at night
doesn't. The
skin effect (not to be confused with human skin) means that
almost
none of the energy penetrates the skull at 146 MHz. If it
doesn't
penetrate, how can it cause an effect?
As you point out modern cell phones put out much less power
(<100 mW).
Since the skin effect is much greater at cell phone
frequencies, I
don't think there is a snowball's chance of a cell phone causing
damage to any part of the body with the possible exception of
the
eyes. There is anecdotal evidence that looking at a functional
cell
phone while driving can cause injury and even death to the
whole body.
Fred Townsend
DC to Light
Tang, George wrote:
My personal opinion is that the research findings MAY have some
valid
points, however, the data they have is way out-dated. We know that in the
late '80s, people use mobile phones that put out several watts of radiated
power. In the early '90s when cell phones were just starting to appear on the
market, most of them were still putting out more than 1 watt of radiated
power. We have heard of technicians who worked on LAN equipment while talking
on the cell phone, and the cell phone radiation induced data error in the
Ethernet lines. Those were the days when the cell phone transmitted too much
power. In the last few years, the goal of achieving longer talk time, thus
lower power consumption, and the use of low voltage electronics due to the
widely incorporation of sub-micron transistors have limited the cell phone
transmitted power down to low mW range. The research is so far behind the
improvements in technology that their findings are out-dated by the ne
w products on the market today. Of course, I am not a medical
expert in the
cancer field, and I do not design or manufacture cell phones, so I certainly
cannot speak for the experts in these areas. But I do know that these
findings most likely are not applicable to the products out on the market
today.
George Tang
-----Original Message-----
From: emc-p...@ieee.org <mailto:emc-p...@ieee.org>
<mailto:emc-p...@ieee.org> [mailto:emc-p...@ieee.org] On Behalf Of Fred
Townsend
Sent: Thursday, July 24, 2008 12:09 PM
To: Derek Walton
Cc: IEEE EMC Discussion Group
Subject: Re: Another Cancer Scare?
I heard the interview. The doctor appeared to dodge the
question as to
proof. He did say more research was needed (Ignoring this
subject has
already been extensively researched.). It appeared to be a
blatant
attempt to get research funding.
Fred Townsend
DC to Light
Derek Walton wrote:
Does anyone know more about the research spoken about
in the BBC news
artical?
http://news.bbc.co.uk/2/hi/health/7523109.stm
Is it really new unpublisged research or just rehashing
the old?
Sincerely,
Derek Walton L F Research
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