Davidovic, "Dynamical time
versus system time in quantum mechanics," Chinese Physics B, vol.
For the difference between uniform Dynamical Time
(now called Terrestrial Time, TT) and Universal Time, the value [DELTA]T = +67 seconds has been used.
Focussing initially on how the conflict between the directional chronological time of history and the reversible dynamical time
of classical physics has been resolved by the invalidation of the dynamical sense of time by non-linear dynamics, Velasco then shows how non-linear dynamics has been complemented by symbol mediated language.
It is the difference, at a given instant, between Universal Time and the uniform time scale known as Dynamical Time
. While the latter is defined by atomic clocks, Universal Time is based on the rotation of the Earth around its axis.
Dynamical time is the time embraced by most of the laws of physics.
(3) The indifferent time interval or dynamical time of classical mechanics is responsible for the philosophical position called Laplacian determinism--that the distinction between past, present and future is illusory because both the past and the future are already implicit in the present.
(22) Accordingly, it instructs human affairs with dynamical time. That is to say, only with present conditions.
How inimical to complexity the government of human affairs by present conditions alone or what is effectively dynamical time secured through temporal myopia is may be appreciated as follows: Temporal myopia militates against sustainable logging because agriculture yields quicker, more reliable, less risky returns to investment.
To put it another way, the Bayesian statistical objection is only valid if we operate in an atemporal or dynamical time rather than in temporal or chronological time.
In 1984 ET was replaced by Terrestrial Dynamical Time (TDT); the name was shortened in 1991 to Terrestrial Time (TT).
Also created in 1984 was Barycentric Dynamical Time (TDB), which is referred to the solar system's center of mass; it accounts for tiny effects on the flow of time in Einstein's theory of general relativity.
To mention only a few: relativistic effects, Barycentric Dynamical Time
, measurement of Atomic Time, clock synchronization by very-long-baseline interferometry, planetary terms in nutation (used only for arc-millisecond accuracy!), the FK5 system, laser ranging, and rotation parameters for satellites of the planets.