In the case of epidemiology simulations, much information is gained by simulating all 300 million people in the US population to see patterns in disease outbreak, and the relative effectivness of various intervention strategies.  Essential to this, of course is that the city/transportation population networks and activity patterns be realistically represented.

--Doug

On 10/9/06, Jochen Fromm <[EMAIL PROTECTED]> wrote:

Besides the technical issues, what is the advantage of
parallel agent-based simulations ? Can you achieve more
with a billion agents than with a few thousand, or is it
just an attractive-sounding possibility ? An ant colony
with a billion ants will not be significantly different
or more intelligent than a colony with 10.000 ants. A swarm
with 10.000 birds will look similar to a swarm with 100
birds, only a bit more fine-grained.

Is a simulation with millions or billions of agents somehow
qualitative different from a simulation with only a few
thousand agents ? Certainly not if they are all alike, if
they all do the same or if they all "live" in the same
environment. I looks very difficult to construct a billion
different agents or to assign different tasks to billions
of agents.

In evolutionary systems, AI, and ALife, scale certainly
matters: a typical human brain has billions of neurons,
a chromosome contains roughly a GByte program with a
billion bytes, and evolution on Earth took from the
earliest forms to the computer nerd today a few billion
years. If we expect something interesting in an evolutionary
ALife system, do we have to let it run for some billion years
using a billion agents in order to get a "genetic code"
with a billion bytes ?

I bet the first true AI will have more than a billion bytes
of code, too (already a few films take easily a few GByte of
data). Somehow the lower bound for interesting behavior seems
to be a billion interacting units - why is this so ?

-J.


============================================================
FRIAM Applied Complexity Group listserv
Meets Fridays 9a-11:30 at cafe at St. John's College
lectures, archives, unsubscribe, maps at http://www.friam.org



--
Doug Roberts, RTI International
[EMAIL PROTECTED]
[EMAIL PROTECTED]
505-455-7333 - Office
505-670-8195 - Cell
============================================================
FRIAM Applied Complexity Group listserv
Meets Fridays 9a-11:30 at cafe at St. John's College
lectures, archives, unsubscribe, maps at http://www.friam.org

Reply via email to