Interpretation of some terms expressing the physical essence of time

Physical properties of time – the dependence of the course of time in some area of space, considered from the viewpoint of an inertial reference frame, upon the character of the physical processes occurring in this area. Physical properties of time are of dynamical nature: they arise as soon as the state of motion of particles changes in the area at hand. Dependence of the course of time upon the character of physical processes is defined by the dynamical principle. Physical properties of time are induced by fields and particles owing to interaction between them.

Dynamical properties of time - the same, as physical properties of time. By the word "dynamical" is expressed the fact that the course of time changes with changing the state of particle’s motion.

Local dynamical inhomogeneity of time - dependence of the course of time along the trajectory of motion of a point particle upon the state of its motion. The essence of the phenomenon of dynamical inhomogeneity of time is that the course of time in one inertial reference frame changes relative to the course of time in the other, and this change depends on the character of motion of particle.

Non-uniformity of the course of time - the course of time along the trajectory of motion of a point particle in some inertial reference frame is assumed to be uniform if the particle traverses identical distances for identical time intervals; otherwise the course of time is considered to be non-uniform. Control of the course of time. Denote by dt the time interval, during which the particle moves in a path relative to some inertial reference frame K under the action of a force field, and by dt' the time interval, corresponding to dt, in the inertial reference frame K', moving relative to the K-frame. Generally, the quantities dt and dt' are connected with each other by the equalities of the type dt'=f(t)dt and dt=g(t')dt', where f(t) and g(t') are some functions dependent on the character of particle’s motion in a force field, and t and t' the instants of time in the reference frames K and K', accordingly. From the equalities given above, it is seen that the change of the character of particle’s motion under the action of a force field results in changing the course of time dependent on the force field acting on the particle. Hence, the course of time in some spatial area can be controlled with the help of a force field acting on a physical system placed in this area.