Tuesday, February 2, 2010

Re: [Yasmin_discussions] simulation vs emulation vs representation

Roger,

Is it not confusing to use simulation itself as a term in this division, as emulation and representation could be considered as alternative forms of simulation as well? Perhaps a new term (existing, or an older term, or metaphor) might be suggested on Yasmin, as a criteria 'the best scientific laws' available' is problematic as this shifts at speeding rates...?

jennifer (j.)


________________________________
From: roger malina <rmalina@alum.mit.edu>
To: YASMIN DISCUSSIONS <Yasmin_discussions@estia.media.uoa.gr>
Sent: Mon, February 1, 2010 2:45:06 PM
Subject: [Yasmin_discussions] simulation vs emulation vs representation

ramon

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 was\
but couldnt=do you know ?

i suspect that there are texts on these differences between
represenation/emulation/simulation =maybe yasminers can point
us to them

roger

---------- Forwarded message ----------
From: ramon guardans <ramon.guardans@soundplots.com>


Thank you Roger and Avi, informative and beautiful mterial
adding to this i would suggest

http://www.youtube.com/watch?v=nIwu5MevZyg

and other similar molecular dynamics simulations


be well
r
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