LOGO-L> Volterr's model

[MHELHEFNY@FRCU.EUN.EG]

Hello George Mills !
Thanks for your comment on Volterra's model.I hope I can have enough
time to implement your suggested progect. Such a huge project could be
done by a group of faculty students. Alas I teach in a fuculty of
Engineering; where the students prefer other types of projects.
However,Just two weeks ago I made a lecture for the whole staff of our
fuculty.(over 200 staff-members half of them are professors).from 
depatrtments of civil,archecture;mining;mechanical;electrical and
systems engineering.;some ofthem told me that it was the first time to 
here about Logo;others told me that they thought that logo is a language
for kidds. By the way I told them that I got both UCBLogo and MSWLogo 
for free thanks to Brian Harvey and George Mills.
I showed them some of the examples which was posted by Logo-l members
together with other code to stress that in logo one can do almost every
thing wich is done in other programing languages but easier.
In your last post you mentioned finite elements;I think that you ment
finite differences.
Once again thank you.

George Mills wrote:-
>Very nice but at the end I got:

>I don't know how  to ts  in final
>[ts ct pr (se "FINAL "SUMMARY ":) pr "]

>Here is another "contrast" :-) to your Pridator-Prey Problem:

>Look at the example PLATE.LGO this is a seed to MANY
>projects involving finite element analysis. This same
>program could be changed to a population simulation of
>animals. I once did a neat project that had to simulate
>Wolves and Rabbit population. Each iteration the animal
>would move randomly (North, South, East, West). If a Rabbit
>meet a rabbit it would reproduce 8 bunnies 50% of the time.
>If a Wolf meets a Wolf if would Reproduce 2 Pups 50% of the time.
>If a Wolf Meets a Rabbit it was eaten.
>But if the Wolves ate all the rabbits the Wolves would die.
>A wolf would die if no Rabbits was seen for a while.
>You can add or remove or modify these rules.
>That's part of the fun, for example add rule that
>a bunny does not get eaten everytime only half the
>time. Or the younger the bunny the more likely to
>get eaten when a wolve is encountered.

>The Object is to see how sensitive an eco system is.
>And you have to work hard to balance the parameters
>in the formulas above such that it will "Cycle" with
>both living together for a long time.
>You can go nuts with this simulation making more
>and more life like as to what would really happen.
>Like baby bunnies would stay with Mommy for a while
>and not reproduce until it old enough. Wolves tend
>to move in packs etc.
>The basic Idea is to setup a grid similar to
>the one in PLATE.LGO randomly sprinkle wolves
>and rabits around the grid and let the
>simulation run. Apply what ever rules you like
>to each cell. Each cell could contain something like
>A list of 2 lists, the first list would be the ages
>of bunnies in the cell and the second list the
>ages of the wolves in the cell.

>I'll leave it to your imagination as to how you might
>display the state of things, but how PLATE.LGO display
>temperature could be one way. Note also the the grid
>in PLATE.LGO is probably way to large/fine and can
>be much more course like 50x50 with "cells" of 10x10
>pixels.

>The coolest thing about this program is that you
>get the sense that the program has life in it.

------------------
Best Regards
Mhelhefny.

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