For description of the visco-elastic behavior of soft biological tissues, Fung proposed a visco-elastic model formulated in terms of a relaxation function and corresponding relaxation spectrum. For the corresponding creep function, Fung proposed an expression which needs correction to obtain a consistent formulation. This creep function and the corresponding creep spectrum are derived in this n...

Magnetic relaxation processes were first discussed for a crystal of paramagnetic transition ions. It was suggested that mechanical vibrations of the crystal lattice (phonons) modulate the crystal electric field of the magnetic ion, thus inducing a 'direct' relaxation between two different spin states. Direct relaxation has also been predicted for single-molecule magnets with a large spin and a ...

Abstract The relaxation time approximation (RTA) is a well known method of describing the evolution statistical ensemble by linking distributions variables interest at different stages their temporal evolution. We show that if all occurring in RTA have same functional form quasi-power Tsallis distribution which depends on its control parameter, nonextensivity q ( t ), then it more convenient to...