Howard Cork Hayden, Emeritus Physics Professor, University of Connecticut: This presentation is about the Direct Proportion Model (aka LNT). It focuses on the horizontal axis (dose). Dose is an intensive variable, not an additive quantity (collective dose corollary). It presents extensive and intensive variables in language of thermodynamics. Radiation Dose is not an additive quantity. Use the Dose axis with great care. There are discoveries to be made when researchers abandon the notion that dose is an additive quantity.