In physics, T-symmetry - the study of thermodynamics and the symmetry of certain physical laws where the concept of time is reversed — i.e. where a mirror (reverse) transformation is applied to a forward direction time state.
Time reversal signal processing, a signal processing technique popular in acoustics, and currently being applied to electromagnetics, that results from the reversal in time of a system's response signal.
Time travel, theorised and speculative concepts about travelling physically through time.
The reversal in a decade-long series of rising deaths arrived at the same time as a massive increase in funding for heat response programs, largely from federal grants ... for the rise in that time.