Thanks everyone for your help and suggestions in the first thread,I've come across a very interesting article that I might try.
http://mirror.lerfjhax.com/www.eng.u.../~gmilburn/ac/
(click on the second link to view)
http://mirror.lerfjhax.com/www.eng.u.../~gmilburn/ac/
(click on the second link to view)


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