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Date:      14 Dec 2001 14:10:06 -0800
From:      swear@blarg.net (Gary W. Swearingen)
To:        j mckitrick <jcm@FreeBSD-uk.eu.org>
Cc:        freebsd-chat@FreeBSD.ORG
Subject:   Re: Who writes the esoteric scientific Unix apps?
Message-ID:  <f9vgf98ncx.gf9@localhost.localdomain>
In-Reply-To: <20011214170714.A13736@dogma.freebsd-uk.eu.org>
References:  <20011214170714.A13736@dogma.freebsd-uk.eu.org>

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j mckitrick <jcm@FreeBSD-uk.eu.org> writes:

> We hear so often that high-end Unix worstations are used for advanced
> scientific applications.  The biggest of the big iron usually goes to
> weather/finance forecasting and especially nuclear research.
> 
> Who writes these apps?  Specialized software companies or in-house
> developers?  Are they batch-based, command line apps or GUI driven?

Most of it is part of a simulation of some sort.  Simulations of the
real world, simulation of proposed parts for a new real world, and even
similation of past worlds in a some cases (eg, tail falling off).
There are innumerable things to simulate, and better simulations allow
reductions of risk and reductions of wasteful "margins" on designs.

Simulations involve approximations and short-cuts throughout and more
computing power is always welcome and soon taken advantage of when made
available.

It's great fun, involving science, math, and often experimentation
or just experimental results for qualifying the simulations.  It's
done by both scientists and engineers and sometimes technicians.

Mostly in-house buy people who get almost all of their expertise on the
job, but there are also many small companies who specialize in some
simulation niche.

I'd guess that most are started from a command line, most likely with
no arguments, being config-file or even just new source-code driven.
But there's lots of scientific coding in embedded or GUI software like
pilot-training simulators (full-sized or PC-based), warfare simulators
and mission planning systems, and some medical equipment like body
scanners and laser surgery equipment.

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