The Legacy of Camillo Possio to Unsteady Aerodynamics.- The Possio Integral Equation of Aeroelasticity: A Modern View.- Beyond Possio Equation: The Legacy of Camillo Possio to Flight Dynamics and Hydrodynamics.- One Hundred Years Since the Introduction of the Set Distance by Dimitrie Pompeiu.- Analysis of a PDE Model for Sandpile Growth.- On Warm Starts for Interior Methods.- Recent Advances in Bound Constrained Optimization.- P-Factor-Approach to Degenerate Optimization Problems.- Non Monotone Algorithms for Unconstrained Minimization: Upper Bounds on Function Values.- On the Efficiency of the ?-Subgradient Methods Over Nonlinearly Constrained Networks.- Preconditioned Conjugate Gradient Algorithms for Nonconvex Problems with Box Constraints.- Multiobjective Optimization for Risk-Based Maintenance and Life-Cycle Cost of Civil Infrastructure Systems.- Application of Multi-Objective Genetic Algorithm to Bridge Maintenance.- A Method for the Mixed Discrete Non-Linear Problems by Particle Swarm Optimization.- Optimization of Cooling Pipe System of Plastic Molding.- Optimum Design of Cooling Pipe Systems by Branching Tree Model in Nature.- Implementation of Multiobjective Optimization Procedures at the Product Design Planning Stage.- On the Numerical Solution of Stochastic Optimization Problems.- Parameter Estimation of Parabolic Type Factor Model and Empirical Study of US Treasury Bonds.- Multi-Stage Stochastic Electricity Portfolio Optimization in Liberalized Energy Markets.- SSD Consistent Criteria and Coherent Risk Measures.- Optimal Policies Under Different Pricing Strategies in a Production System with Markov-Modulated Demand.- An Adaptation of Bicgstab for Nonlinear Biological Systems.- Numerical Approximation of a Control Problem for Advection-Diffusion Processes.- A New Low Rank Quasi-Newton Update Scheme for Nonlinear Programming.- Reliability in Computer Networks.

We publish in this volume the plenary talks and a selection of the papers on numerics, optimization and their applications, presented at the 22nd Conference on System Modeling and Optimization, held at the Politecnico di Torino in July 2005. The conference has been organized by the Mathematical Department of the Politecnico di Torino. IFIP is a multinational federation of professional and technical organi- tions concerned with information processes. It was established in 1959 under the auspices of UNESCO. IFIP still mantains friendly connections with s- cialized agencies of the UN systems. It consists of Technical Committees. The Seventh Technical Committee, established in 1972, was created in 1968 by A.V. Balakrishnan, J.L. Lions and G.I. Marchuk with a joint conference held in Sanremo and Novosibirsk. The present edition of the conference is dedicated to Camillo Possio, lulled by a bomb during the last air raid over Torino, in the sixtieth anniversary of his death. The special session "On the Possio equation and its special role in aeroelasticity" was devoted to his achievements. The special session "Shape Analysis and optimization" commemorates the 100th anniversary of Pompeiu thesis.