A viewpoint on observability and observer design for nonlinear systems -- Model-based observers for tire/road contact friction prediction -- Observer design for nonlinear oscillatory systems -- Transformation to state affine system and observer design -- On existence of extended observers for nonlinear discrete-time systems -- Stability analysis and observer design for nonlinear diffusion processes -- Nonlinear passive observer design for ships with adaptive wave filtering -- Nonlinear observer design for integration of DGPS and INS -- Variants of nonlinear normal form observer design -- Separation results for semiglobal stabilization of nonlinear systems via measurement feedback -- Observer-controller design for global tracking of nonholonomic systems -- A separation principle for a class of euler-lagrange systems -- High-gain observers in nonlinear feedback control -- Output-Feedback Control of stochastic nonlinear systems -- Output feedback control of food-chain systems -- Output feedback tracking control for ships -- Dynamic UCO controllers and semiglobal stabilization of uncertain nonminimum phase systems by output feedback -- Fault detection observer for a class of nonlinear systems -- Nonlinear observer for signal and parameter fault detection in ship propulsion control -- Nonlinear observers for fault detection and isolation -- Application of nonlinear observers to fault detection and isolation -- Innovation generation for bilinear systems with unknown inputs -- Synchronization through extended kalman filtering -- Nonlinear discrete-time observers for synchronization problems -- Chaos synchronization.