  In the frustrated interaction systems, the nature of ordered configuration
can be intrinsically temperature dependent. There, the idea of effective
coupling of decorated and frustrated bond plays an important role. The idea of
effective coupling is verified in the study of equilibrium properties. We will
study how the effective coupling is realized in the dynamical processes, e.g.
the relaxation time after a change of temperature. We also study the memory
phenomena which have been found in the spin glass.
