[ASME ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering - San Diego, California, USA (June 10–15, 2007)] Volume 5: Ocean Space Utilization; Polar and Arctic Sciences and Technology; The Robert Dean Symposium on Coastal and Ocean Engineering; Special Symposium on Offshore Renewable Energy - Numerical Modelling of Floating Breakwaters and Shape Optimization Using a Nonlinear Programming Method