In this book, the authors present current research on nonlinear analysis, from across the globe. Topics include modelling of the characteristics of inelastic members of reinforced concrete structures in seismic nonlinear analysis; automatic estimation of the apnea-hypopnea index from oxygen saturation recordings using non-linear regression analysis; nonlinearity in bridge structural analysis; nonlinear analysis of spontaneous MEG activity in Alzheimer’s disease; mesh free-enriched finite element methods for nonlinear analysis of path-independent and path-dependent problems in solids; nonlinear analysis research in biomedical engineering; and nonlinear evolution analysis for flow during alloy crystallization.