[3685] in Central_America
New quotes for Thu Oct 10
daemon@ATHENA.MIT.EDU (Initializer.SysDaemon)
Thu Oct 10 01:33:24 1991
Date: Thu, 10 Oct 91 01:32:57 EDT
From: root@charon.MIT.EDU (Initializer.SysDaemon)
To: ca-mtg@bloom-beacon.mit.edu
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aras (Sheldon Robinson):
Did you know that even the geeks turn around to look at all
the beautiful women that pass them in the corridors...
...they look and later they dream.
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eichin (Mark W. Eichin):
Well, it says it was in Science News... and 700C is kind of warm...
still, it looks more like "Cold Fusion in the Network Cables" than
anything else... from comp.risks:
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Date: Tue, 1 Oct 91 15:04:48 EDT
From: sorensen@spl.ecse.rpi.edu (Jeffrey Sorensen)
Subject: Fiber optics can spontaneously destroy themselves!
In the Sep 28 issue of _Science News_ there is an article about a recently
discovered property of fiber optic cables that could lead to all kinds of
risks.
It turns out that a fiber optic in an environment "where the temperature
can suddenly increase" can result in the complete destruction of a fiber
optic in what is known as a fiber "fuse" effect. "For certain types of optical
fibers...damage can occur when the visible-light laser power transmitted...
is as low as 4 milliwatts..."
The damage to the fiber is a series of bullet-shaped cavities that form
at equidistant spacings from the sight of heat damage tracing back towards
the laser light source. "The damage effectively (ruins) the fiber as a
medium for transmitting light. One test showed that a single flare could
damage 1.5 kilometers or more of fiber." The damage travels at a rate of
about 1 meter per second!
The causes of the phenomena are being researched and the sides of the debate
are presented in the article (pp. 200-201). The effect is related to the
germanium concentration and fibers with high concentrations are at the most
risk. The temperatures required to cause the effect are between 700 'C and
1,000 'C.
On the risks involved: "It's a lot more catastrophic than just cutting a
line...you basically destroy the fiber." Anyone using these types of fibers
in, say, a nuclear reactor or for a critical sensor would be well advised to
check this out.
Jeff Sorensen sorensen@ecse.rpi.edu (518) 276-8202
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jik (Jonathan I. Kamens):
Remember the old TelCo saw that "the most reliable switcher is tended
by a man and a dog; the man is there to feed the dog, and the dog is
there to keep the man away from the equipment."
-- colwell@ichips.intel.com (Bob Colwell)
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mstovino (The Veeter):
To crush Chaw's new record
To see him pass out before me
To hear the lamentation of the 2nd L.
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starflt (Derrick Kong):
PITY THE RUSSIANS
The Russian player never wins a game of Fire Fight. It was designed
as an instruction tool for the Army; the scenarios are deliberately
unbalanced to "teach" the players about tactics.
from Murphy's Rules
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therese (Therese):
You're looking at my plan? :) I'm honored :)
Will you zwrite me too?
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wslee (Whay Sing Lee):
Move on, move on, never look back. That is the way of life.
~~~~~~~~~~
Address: Box 52, 3 Ames Street, Cambridge, MA 02139.
Tel: (617)225-6211 (H) (617)253-6048 (W)
Alternate e-mail address : wslee@ai.mit.edu
~~~~~~~~~~
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-->> Wed Oct 9 20:55:08 EDT 1991
-->> I logged OUT from wslee@m11-113-12.mit.edu
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--- End of Central America ---
