He had shifted phase immediately, and concentrated on getting the hell out of the neighborhood.

"However, just past the kickfield of the Living Dead the modules have not yet shifted phase."

The velocity and acceleration of a simple harmonic oscillator oscillate with the same frequency as the position but with shifted phases.

In a quasi-linear system, when the input is a sine wave, the output will be a sine wave of the same frequency but with a scaled amplitude and shifted phase as given by .