The monetary system is studied as a crucial element in determining the long - run behaviour of price levels, the inflation rate, and other nominal variables. (sauder.ubc.ca)
Two different model systems were studied: a polymer melt (silicone oil) and a molten (borosilicate) glass of comparable viscosity. (science.sciencemag.org)
Their record keeping and admin systems are studied worldwide as an example effective heathcare delivery. (religion.blogs.cnn.com)