SEARCH Articles Figures Tables Equations tool narayanaswamy moynihan Narayanaswamy equation Narayanaswamy theory Narayanaswamy-Moynihan nonlinear Relaxation time Narayanaswamy-Moynihan nonlinear Tool-Narayanaswamy Tool-Narayanaswamy-Moynihan Tool-Narayanaswamy-Moynihan TNM) model Tool-Narayanaswamy-Moynihan model