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Mailing List Logs for ShadowRN

Message no. 1
From: Alfredo B Alves <dghost@****.COM>
Subject: Thermographics and glass (Was Building Races)
Date: Wed, 8 Jul 1998 18:30:30 -0500
On Wed, 8 Jul 1998 14:27:08 +0100 Spike <u5a77@*****.CS.KEELE.AC.UK>
writes:
>And verily, did Wraith hastily scribble thusly...
>|Hmm...I was going to answer this saying that it is an insulator, but
does
>|the two paned glass windows have a vacuum? I thought they had air
>|in-between them. Whatever the answer is, the two-paned glass windows
act as
>|an insulator, and thus could possibly mask the thermal signature of the
>|person being looked for.

>Correct, a vacuum is an insulator. All an insulator does is prevent
>CONDUCTION of energy however.
>
>Thermal imaging is based on Infra-red RADIATION , and an insulator
>will *NOT* stop that.
>
>Remember your basic science classes.
>3 ways to transfer heat... Conduction, Convection, and Radiation.
>(You still feel the heat of the sun through double glazing remember)
>
>A special coating on a window that allows visible
>light to pass but absorbs/reflects IR would work though....
>--
<SNIP Sig>
>|Andrew Halliwell
<SNIP More Sig>

Query: wouldn't the glass radiate its own heat? and override any other
heat radiated unless 1) the other heat was significantly Hotter than the
glass or 2) was very close to the glass ...

After scanning through 3 physics books (I could scan through more ...
maybe later), I still have no idea ... the sections in those books were
small, very small, and non-existant ... However the thermogram of a house
in one of the books seemed to support the idea that the windows heat
would overide the heat signatures of those inside ... btw, heat escapes
from a house by radiation doesn't it?

Also, does cyber thermo override normal vision or does it overlay the
thermogram?

D.Ghost
(aka Pixel, Tantrum, and RuPixel)
"Let he who is without SIN cast the first stone"

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Message no. 2
From: Gurth <gurth@******.NL>
Subject: Re: Thermographics and glass (Was Building Races)
Date: Thu, 9 Jul 1998 11:38:36 +0100
Alfredo B Alves said on 18:30/8 Jul 98,...

> Query: wouldn't the glass radiate its own heat? and override any other
> heat radiated unless 1) the other heat was significantly Hotter than the
> glass or 2) was very close to the glass ...

That's what I've always assumed too. Perhaps what's needed is
access to a thermal imager to test some theories...

> Also, does cyber thermo override normal vision or does it overlay the
> thermogram?

I think you can choose which mode you want; it wouldn't be that
hard to construct the imager in such a way that either is possible.

--
Gurth@******.nl - http://www.xs4all.nl/~gurth/index.html
"That's IT, lunchbox!!! We'll go to Shermer, Illinois!"
-> NERPS Project Leader * ShadowRN GridSec * Unofficial Shadowrun Guru <-
-> The Plastic Warriors Page: http://www.xs4all.nl/~gurth/plastic.html <-
-> The New Character Mortuary: http://www.electricferret.com/mortuary/ <-

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