Velocity,Acceleration, and infact any nth deravitive of space over time (jerk etc.), affect time. The Lorentz transformation shows an equation of how time is affected with a constant accleration. I myself have developed an equation for how constant acceleration affects time. Furthermore, despite what numersous physcists say, it is mathematicaly impossible to accelerate past the velocity of light, even under the gravitational pull of a black hole. However, if an equation were known for the affects of gravity upon time, one could solve a differntial equation for acceleration due to gravity and complete the unified theorom.