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Article #152

Re: Medical EVALUATION of computer SCREENS (Tektronix XP-12, SGI GDM-1934SG)

#152
From: Alex McPhail
Date: Sat, 28 May 1994 02:10
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In article <CqGGo9.6G3@hermes.hrz.uni-bielefeld.de> fuellen@math10.Mathematik.Uni-Bielefeld.DE (Georg Fuellen) writes:

>********************************************************************
>Buying a new computer screen (more specifically, an X-Terminal),
>how can I find out which one is the most friendly to my health ?

>********************************************************************
>Is there any list of test results w.r.t. radiation, eyestrain, etc,
>preferably sorted by manufacturer/product name ?

Some time ago the Health Protection Branch of Health and Welfare Canada
conducted a study of radiation emmissions from various monitors in
Winnipeg, Manitoba.  They shielded their test environment with steel plates
taken from pre-WWII battle ship hulls (all steel made after 1945 includes
recycled metal, and possesses higher indigenous background radiation 
concentrations) to prevent stray and background radiation from affecting
their tests.

As I recall from the report, when conduction high energy radiation tests,
they were not able to detect any radiation from any of the monitors.  When
the operator entered the room, however, the detection equipment went off-
scale due to the natural background emmissions from human tissue.  They
concluded, probably tounge in cheek, that the trendy radiation shields 
being peddled in that time really protected the monitor from the operator's
background radiation!!

This test was conducted before concerns about low energy E/M radation from
power supplies and fly-back transformers became an issue.  They may well
have conducted further tests since I was in that loop.

For more information, you can contact the Health Protection Branch
of Health Canada (previously Health and Welfare Canada) at (613) 957-2991.

Alex
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From: amcphail@hookup.net (Alex McPhail)
Newsgroups: sci.med.occupational,sci.med.physics,bit.listserv.c+health
Subject: Re: Medical EVALUATION of computer SCREENS (Tektronix XP-12, SGI GDM-1934SG)
Date: Sat, 28 May 1994 02:10:53 GMT
Organization: TeraScope Research
Lines: 35
Message-ID: <amcphail.131.2DE6A82C@hookup.net>
References: <CqGGo9.6G3@hermes.hrz.uni-bielefeld.de>
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Keywords: computer screen, X-Terminal, Medical EVALUATION
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