Over the coming weeks and months ill be looking to break down the titled subject and try and shed some modern research into each factor to which should help everyone one of you understand your environment and the factors which control of balance
For not i will leave the more keen of you with some background reading from 2005
http://php.scripts.psu.edu/users/d/r/dr ... Manual.pdf
I hope you all enjoy the ride
![Cool 8-)](./images/smilies/icon_cool.gif)