Part I: Review Articles. Transitions between Spatio- Temporal Patterns in Non Equilibrium Systems; D. Walgraef. Galilean and Relativistic Nonlinear Wave Equations: An Hydrodynamic Tool?; M. Abid, et al. Part II: Instabilities and Pattern Formation. Chaotically Induced Defect Diffusion; P. Coullet, K. Emilsson. Pattern Formation and Phase Turbulence in the Transverse Section of Lasers; G. Juyet, S. Rica. Long Wavelength Oscillatory Instability in Binary Fluids; T. Clude, et al. Multiple Front Propagation in a Potential Non-Gradient System; M. San Miguel, et al. Pattern Selection and Diffusive Instability; M.F. Hilali, et al. Monotonic Fronts of the Reaction-Diffusion Equation in One Space Dimension; R.D. Benguria, M.C. Depassier. Poiseuille Flux of Hard Particles: Theory and Simulations; D. Risso, P. Cordero. Stationary Convection Due to Resistivity and Viscosity in a Cylindrical Plasma with a Free Boundary; L. Gomberoff. Ginzburg-Landau Equation for Oscillatory Convection in Oldroyd-B Fluids; J. Martinez-Mardones, et al. Laser Model with Periodic External Injected Signal and Noise: Small Net Gain Limit; R.C. Buceta, et al. Flow Transitions in Rayleigh-Benard Convection: Influence of Heating Rate; R. Hernandez. Part III: Stochastic Effects. Noise Induced Phase Transitions; J.M.R. Parrondo, C. van den Broeck. Competitive Coexistence in Biological Systems: Exact Analytical Results Through a Quantum Mechanical Analogy; H.S. Wio, et al. Effects of Disorder on Reaction- Diffusion Systems: An Analytical Approach; M.A. Rodriguez. Concerning the Noise Strength in Periodically Driven Pattern Convection; M.O. C?ceres. Quasi- Stationary Distribution and Gibbs Measure of Expanding Systems; P.Collet, et al. Detailed Balance and Reversed Process for Macroscopic Systems; F. Barra, et al. Part IV: Statistical Mechanics and Applications. Substantial Irreversibility in Quantum Cosmology; M. Castagnino, et al. Generalized Spectral Decomposition for a ClalĂ