In December 1994 Professor Enok Palm celebrated his 70th birthday and retired after more than forty years of service at the University of Oslo. In view of his outstanding achievements as teacher and scientist a symposium entitled "Waves and Nonlinear Processes in Hydrodynamics" was held in his honour from the 17th to the 19th November 1994 in the locations of The Norwegian Academy of Science and Letters in Oslo. The topics of the symposium were chosen to cover Enok's broad range of scientific work, interests and accomplishments: Marine hydrodynamics, nonlinear wave theory, nonlinear stability, thermal convection and geophys­ ical fluid dynamics, starting with Enok's present activity, ending with the field where he began his career. This order was followed in the symposium program. The symposium had two opening lectures. The first looked back on the history of hydrodynamic research at the University of Oslo. The second focused on applications of hydrodynamics in the offshore industry today.

I Review Articles.- A Brief Historical Account of Hydrodynamic Research at the University of Oslo.- Hydrodynamics in Industry. Some Examples with Special Emphasis on Marine Applications.- II Marine Hydrodynamics.- Two Fragments of a Method for Fully Nonlinear Simulations of Water Waves.- Analysis of Non-Linear Wave-Body Interactions Using Finite Elements.- On the Motion of a Rigid Body in Non-Uniform Flows.- Interaction between Waves and Slowly Rotating Floating Bodies.- Experiences from Comparing Theory with Environmental and Platform Data.- Nonlinear Scattering of Long Waves by a Vertical Cylinder.- Mathematical Aspects of the Cauchy-Poisson Problem in Three Dimensions.- III Nonlinear Waves.- Finite Elements for the Boussinesq Wave Equations.- Continuous Bores on a Viscous Fluid Down an Incline.- Refraction of Solitons and Wave Jumps.- Effect of Film Elasticity on Drift Currents Induced by Growing Waves.- A Resonating Triad of Gravity-Capillary Waves on a Long Gravity Wave.- Breaking of Ocean Waves and Downshifting.- Surface Tension Gradient-Driven Wave Motion in Shallow Liquid Layers.- IV Nonlinear Stability and Convective flows.- Bifurcation Sequences in Problems of Thermal Convection and of Plane Couette Flow.- On the Steady Flow in a Cell Created by a Double-Diffusive Convection Instability.- Double-Diffusive Experiments.- Role of Non-Wave-Like Disturbances in Transition.- Behaviour of a Nonlinear Convective Oscillator as Modified by Sub-and Super-Critically Unstable Hopf Bifurcations.- Waves and Secondary Flows in Stratified Gas/Liquid Duct Flow.- Transient Free Convection in a Horizontal Porous Cylinder with a Sudden Change in Wall Temperature.- Rayleigh-Bénard Convection with Weak Shear Flow: Absolute and Convective Instabilities.- V Geophysical FluidDynamics.- Experiments on Turbulence in Stratified Rotating Flows.- The Flow Generated in a Stratified Fluid by the Motion of a Flat Horizontal Disk.- Models of Drift and Dispersion in Tidal Flows.- Self-Organization Phenomena in 2D-Flows.- A New Paradigm for River Plume Mixing.- Wave Attenuation due to Bottom Vegetation.- Modelling Mesoscale Features in the Ocean.- Alphabetical List of Contributors.