in biology , specially molecular biology the distinction is complicated, also because , like in astronomy, what one is simulationg are already images mediated by a microscope, telescope or other device that has a way to bring things to us thus changing them already.
i think its also useful to think about the three kinds of relations,
us versus simulation/emulation ,
simulation/emulation versus the physical process it deals with,
and our relation with the process mediated by the simulation.
Are the astronomical simulations you pointed out very different in their strucutre and function from an armillary sphere, also a simulation and representation of the cosmos that one can use to test out things,
--- On Mon, 2/1/10, roger malina <firstname.lastname@example.org> wrote:
> From: roger malina <email@example.com>
> Subject: [Yasmin_discussions] simulation vs emulation vs representation
> To: "YASMIN DISCUSSIONS" <Yasmin_discussions@estia.media.uoa.gr>
> Date: Monday, February 1, 2010, 8:45 AM
> thanks for the example of molecular dynamics-
> i guess i would distinguish three sub categories
> - representation/ eg a walt dysney cartoon that elicits
> human response like
> the physical phenomenon but the animation does not encode
> any physics
> - emulation- where the representation behaves like the
> physical phenomenon
> but does not encode the same physical assumptions ( eg a
> computer can
> emulate old software but runs on new computer chips and
> emulates the way the
> old chips behaved)
> - simulation- where the software system encodes the best
> scientific laws
> available to enable a system to behave like the real
> phenomenon= many
> artificial life systems try to do this
> the two examples i gave on stellar evolution and evolution
> of structure of
> the universe are "simulations'= i tried to
> find out what category the molecular dynamics animation
> but couldnt=do you know ?
> i suspect that there are texts on these differences
> represenation/emulation/simulation =maybe yasminers can
> us to them
> ---------- Forwarded message ----------
> From: ramon guardans <firstname.lastname@example.org>
> Thank you Roger and Avi, informative and beautiful mterial
> adding to this i would suggest
> and other similar molecular dynamics simulations
> be well
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