The shifts are not easy to explain, because they take a different form every time. The Malnosso claim that they subject us to them for the sole purpose of getting us out of here. That has yet to be confirmed...

Though, if you have any specific question about them, please ask, I will do my best to answer.

As for the Dome, it is the most advanced simulation technology I have seen yet. It is possible to interact with the holograms, making it for combat training.