Slow mode viscoelastic time scale

The slow mode s properties are substantially the properties expected of frustration-limited clusters. Changing the control variable primarily changes the number of clusters but not their size. The slow mode indeed scales as at small q, but at least in many systems as q at large q. The longest relaxation times in S q, t) and in the viscoelastic relaxation spectrum are indeed about the same(48). Comparison might also be made between slow mode properties and the Rouse cryptocrystallite model(91). 

The stress obtained from rheological measurements reflects anisotropy of the stmcture of the stress-sustaining units, as explained earlier. Since larger scale motion of these units usually requires a longer time, the slow viscoelastic relaxation modes reflect the large-scale (global) dynamics of those emits in a material while the fast modes detect the local dynamics. 

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