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  1. #61
    Dennis Ferguson
    Guest

    Re: NEWS: Mobiles linked to disturbed sleep

    On 2008-01-25, g <[email protected]> wrote:
    > The really big source of radiation we all share, the sun, delivers
    > roughly one KILOWATT every square meter on the earth. It is the
    > identified cause of all sorts of skin problems, cancers, melanomas etc.


    It's also getting silly. The rad, and the gray, measure dosages of
    ionizing radiation, e.g. X-rays. Ionizing photon radiation is very
    short wavelength radiation. Only the very shortest wavelengths from
    the sun which make it to the ground (the ultraviolet) are ionizing, and
    they are only barely so, which is why if you wear UV sun block you should
    be safe. The remaining 999.99 Watts per square meter that sun block doesn't
    block won't bother you.

    The center of the sun's spectrum (i.e. the wavelengths that are too
    long to be ionizing and hence don't bother you) is at a wavelength of
    550 nanometers. If you turn on a light in your house it will emit
    radiation at about the same wavelength. If you light up your stove it
    will emit radiation with a wavelength in the 1000's of nanometers, say
    10 times longer than the (already safe) sunlight. The shortest coherent
    wavelength you'll find being emitted by a US cell phone is about 160
    millimeters, 300,000 times longer than the sunlight whose wavelength is
    already too long to do you any harm.

    The number of rads you'll absorb from a CDMA and a GSM cell phone is
    hence the same. It is identically zero in both cases. The CDMA
    phone will heat up your ear a bit more, since its average power
    consumption will be higher, while the GSM phone emits pulses at
    audio frequencies which may, or may not, do something, though god
    only knows what. Other than that, nada.

    Dennis Ferguson



    See More: NEWS: Rapid shutdown of AMPS within months (Steven Scharf dead wong again)




  2. #62
    clifto
    Guest

    Re: NEWS: Mobiles linked to disturbed sleep

    Dennis Ferguson wrote:
    > The center of the sun's spectrum (i.e. the wavelengths that are too
    > long to be ionizing and hence don't bother you) is at a wavelength of
    > 550 nanometers. If you turn on a light in your house it will emit
    > radiation at about the same wavelength. If you light up your stove it
    > will emit radiation with a wavelength in the 1000's of nanometers, say
    > 10 times longer than the (already safe) sunlight. The shortest coherent
    > wavelength you'll find being emitted by a US cell phone is about 160
    > millimeters, 300,000 times longer than the sunlight whose wavelength is
    > already too long to do you any harm.


    That would be a compelling argument if not for the (12 mm?) radiation from
    something like a microwave oven, hundreds of thousands of times longer than
    the sunlight but hazardous nonetheless.

    --
    God help us all,
    The next President of the United States will be a liberal.



  3. #63
    John Navas
    Guest

    Re: NEWS: Mobiles linked to disturbed sleep

    On Fri, 25 Jan 2008 07:34:52 -0800, SMS <[email protected]>
    wrote in <[email protected]>:

    >Anon E. Muss wrote:
    >> On Fri, 25 Jan 2008 03:53:16 GMT, John Navas
    >> <[email protected]> wrote:
    >>
    >> [snip]
    >>
    >>> The scientists concluded: "The study indicates that during laboratory
    >>> exposure to 884 MHz wireless signals components of sleep believed to
    >>> be important for recovery from daily wear and tear are adversely
    >>> affected."

    >>
    >> [snip]
    >>
    >> So GSM 850 is the culprit. I am safe with my 1900MHz only phone.

    >
    >Or with CDMA. Much lower radiation than GSM in either band.


    Actually quite similar, and CDMA radios tend to put out more RF than
    GSM, which is why battery life tends to be shorter for comparable
    models.

    --
    Best regards, FAQ FOR AT&T (CINGULAR) WIRELESS:
    John Navas <http://en.wikibooks.org/wiki/AT&T_Wireless_FAQ>



  4. #64
    John Navas
    Guest

    Re: NEWS: Mobiles linked to disturbed sleep

    On Fri, 25 Jan 2008 15:14:38 GMT, Stephen <[email protected]> wrote in
    <[email protected]>:

    >On Fri, 25 Jan 2008 03:53:16 GMT, John Navas
    ><[email protected]> had a flock of green cheek conures squawk
    >out:
    >
    >> Funded by the Mobile Manufacturers Forum, the scientists studied 35
    >> men and 36 women aged between 18 and 45.

    >
    >Study group not large enough.


    Not necessarily. That only affects the standard error of estimate.

    --
    Best regards, FAQ FOR AT&T (CINGULAR) WIRELESS:
    John Navas <http://en.wikibooks.org/wiki/AT&T_Wireless_FAQ>



  5. #65
    John Navas
    Guest

    Re: Mobiles linked to disturbed sleep

    On Fri, 25 Jan 2008 07:05:17 -0800, SMS <[email protected]>
    wrote in <[email protected]>:

    >Joel Koltner wrote:
    >> "John Navas" <[email protected]> wrote in message
    >> news:[email protected]...
    >>> <http://news.bbc.co.uk/2/hi/health/7199659.stm>

    >>
    >> I can't take an article like that seriously when it gives no quantatative data
    >> whatsoever. Did using phones reduce deep sleep by an hour? 10 minutes? 30
    >> seconds? And sentences such as, "...researchers said they could not rule out
    >> the possibility that long-term [cell phone] use may raise the risk of cancer"
    >> is a rather meaning statement as well, because you could substitude almost
    >> anything for "cell phone" and have some researcher testify to it.
    >> ("...reserachers said they could not rule out the possibility that long-term
    >> Usenet use may raise the risk of cancer!")

    >
    >Dr. Dean Edell had a good laugh at that "study" a couple of days ago. A
    >sample size of 71!


    I guess your knowledge of statistics is as superficial as his is.
    Nothing wrote with such a sample size if done properly. It simply means
    the standard error of estimate will be larger, that small effects won't
    necessarily be seen.

    --
    Best regards, FAQ FOR AT&T (CINGULAR) WIRELESS:
    John Navas <http://en.wikibooks.org/wiki/AT&T_Wireless_FAQ>



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