  Characterization of the non-Arrhenius behavior of glass-forming liquids is a
broad avenue for research toward the understanding of the formation mechanisms
of noncrystalline materials. In this context, this paper explores the main
properties of the viscosity of glass-forming systems, considering
super-Arrhenius diffusive processes. We establish the viscous activation energy
as a function of the temperature, measure the degree of fragility of the
system, and characterize the fragile-to-strong transition through the standard
Angell's plot. Our results show that the non-Arrhenius behavior observed in
fragile liquids can be understood through the non-Markovian dynamics that
characterize the diffusive processes of these systems. Moreover, the
fragile-to-strong transition corresponds to a change in the spatio-temporal
range of correlations during the glass transition process.
