Stabilization of Flexible Structures : Third Working Conference Montpellier France January 1989 Recent work on the scole model Mathematical study of large space structures Symbolic formulation of dynamic equations for interconnected flexible bodies: The GEMMES software Adaptive optics — Shape control of an adaptive mirror Energy decay estimates for a beam with nonlinear boundary feedback Uniform stabilization of the wave equation with dirichlet feedback control without geometrical conditions Actuators and controllability of distributed systems Linear quadratic control problem without stabilizability Riccati equations in noncylindrical domains Boundary control problems for non autonomous parabolic systems Existence and optimal control for wave equation in moving domain Galerkine approximation for wave equation in moving domain Further results on exact controllability of the Euler Bernoulli equation with controls on the dirichlet and neumann boundary conditions Some properties of the value function of a nonlinear control problem in infinite dimensions Identification of coefficients with bounded variation in the wave equation Shape hessian by the velocity method: A Lagrangian approach Shape sensitivity analysis of hyperbolic problems Differential stability of perturbed optimization with applications to parameter estimation A numerical method for drag minimization via the suction and injection of mass through the boundary Using the physical properties of systems for control: An illustration.