aikaderivaationsa
Aikaderivaationsa is a theoretical construct used to describe the rate of change of a quantity with respect to an internal time variable, rather than external laboratory time. The term combines Finnish roots aika (time) and derivaation (derivative). In discussions of non-stationary or clock-dependent systems, aikaderivaationsa denotes the derivative dQ/dτ, where τ is a system-defined clock parameter.
The concept is not part of standard nomenclature in physics or mathematics but appears in speculative or
Suppose Q(t) is a state variable. Define an internal clock τ(t) by dτ/dt = h(Q,t) with h>0. Then
It measures how the state evolves when the flow of time is reparameterized by h. In models
The choice of h is not unique; aikaderivaationsa is not invariant under general reparameterizations. It relates
See also: Time derivative, Internal time, Time reparametrization. This entry describes a speculative construct and is