The original papers in this Special Issue arose from a meeting of the AMSI-MASCOS Theme Program, Concepts of Entropy and their Applications, which took place at Melbourne Australia, November - December, 2007. During the four years that have elapsed since that meeting, research on this topic has progressed significantly.
Although there are various concepts of entropy, they provide unifying insights in a wide variety of both topics and scale. Topics include information theory, forecasting, optimization, irreversible processes, thermodynamics and statistical mechanics, while the scale ranges from the atomic, through the macroscopic to the cosmological.
We feel that it is a good time to call for new contributions from all potential authors. We hope that some of the original authors who had an association with the theme program will provide updates on progress. Other readers of the original issue may be stimulated to provide complementary or supporting material of their own. Finally we welcome new authors who believe that their own work relates well to the overall theme.
Prof. Dr. Philip Broadbridge Prof. Dr. Tony Guttmann Guest Editors