I wondered why the movie is titled as Pacific Rim. I could formulate this: the aliens have opened a window, a bridge to enter our world. This window is in the form of ring hence called as rim. And it is opening inside the Pacific Ocean. Therefore title of the movie is Pacific Rim.

I am not impressed by the idea behind the title of the movie but I am very much interested in the idea of forming neural bridge with the machine and going in drift to form the strong bond with the machine and the partner. One partner is left hemisphere and other is right hemisphere of the brain of machine. Is it possible to have such a strong bond with other where one can share everything in the head with the other?
http://www.theindivisual.in/2013/07/pacific-rim-neural-bridge-and-drift.html