Re: Inertial-dampening systems

From: Gregory L. Hansen (glhansen_at_steel.ucs.indiana.edu)
Date: 02/08/05 

Date: Tue, 8 Feb 2005 02:45:59 +0000 (UTC)

In article <1107814893.153581.57920@c13g2000cwb.googlegroups.com>,
Davorak <Talk2plant@hotmail.com> wrote:
>
>"20 cm diameter makes a circle that is 20 cm in diameter, or with a
>radius
>of 0.1 m. A = pi*r^2 = (3...)*(0.1 m)^2 = 0.03. I selected the 20 cm
>diameter by holding a ruler up to my belly. Humans aren't really
>shaped
>like circles, but an approximately 20 cm diameter circular path will
>exist in the pilot, it's good enough for a BOTE calculation."
>
>Doh, your right Hansen I was being stupid. Though I would still have

Heh! I thought you must be thinking perimeter.

>reservations about even that strong of an electric field librating
>enough free charge to do damage to the human body. For a lightening
>strike or a high voltage line free charge is provided by an outside
>source rather then being librated from their atomic bonds in the human
>body.
>
>Here are some exposure guidelines that I found:
>
>IEEE suggest
>20kV/m and greater in controlled laboratory setting and 5kV/m for
>public exposure for less then 1Hz.
>http://www.osha.gov/SLTC/elfradiation/epri-ieee1-03d.pdf

Uh... I should read the link, I'm going to need some context on that. I
know from a training video related by a colleague at Los Alamos National
Lab that if you put your hand across the terminals of one of those big 25
kV capacitors you won't be electrocuted-- your hand will explode.

After reading to some of the war stories of the electricians, I'd gained
a new respect for electricity. You'd be surprised how often the terms
"bus bar" and "explosion" go together. You get copper coated eyeglasses
if you're lucky.

>
>Lawrence Livermore National Laboratory suggest were simply insulating
>material though it is not very specific for 5kV/m and up.
>http://www.llnl.gov/es_and_h/hsm/doc_20.07/tablea5.pdf
>
>I remember you stating some were in the conversation that you think the
>biological effects would kick in before the joule heating. I would
>have to agree. The LLNL site also says exposure to 4 Tesla of static
>magnetic field can cause head aches. 

-- 
"Outside the camp you shall have a place set aside to be used as a 
latrine.  You shall keep a trowel in your equipment and with it, when you 
go outside to ease nature, you shall first dig a hole and afterward cover 
up your excrement." -- Deuteronomy 23:13-14

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