This is a priori paradoxical result comes from the fact that nonlinear controller designs are often deeply rooted in the physics of the plants. Take an example, consider a swinging pendulum attached, in the vertical plane. Starting from some arbitrary initial angle, the pendulum will oscillate and progressively stop along the vertical axis. Although the pendulum’s behaviour could be analysed close to equilibrium by linearising the system, physically its stability has very little to do with
was the largest Olmec site where archeologists discovered seventy gigantic stone sculptures including ten ruler portraits , the sculptures size shows the power of the rulers as the basalt stone that they were made only exits at least sixty plus miles away from where they found, meaning that it took enormous man power to move it in the absence of the wheel at that time
As we have come to realize, sculptures have been a way of expression and meaning for many years now for the Egyptians and Greeks. Cultures and eras have been distinguished through the identification of technique, material, and size of a sculpture. Not only do we get to see the transition of art over the time, but we also get a sense of what people used to look like and what the meaning of life was like for them so long ago. Over the years, themes have stayed the same with only minor cultural changes