The Forerunner Commentary on Psalms 137:2 argues that these psalms are about the "bitterness of exile into which God forced Judah", purportedly with the goal of turning grief into zeal, so that the "anger can be used to scour away sin" by becoming "righteously indignant".
Dey has offered courses on turbulent flow, sediment transport and scour in different universities of various countries, such as the University of Hong Kong, Università di Pisa, University of Calabria, Politecnico di Milano, University of Florence, University of Oulu, Instituto Superior Técnico, National Chung Hsing University etc.