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In spite of the continued development of surgical techniques, surgeons, vascular surgeons and radiologists are still discussing the best possible method for restoring the patency of the superficial femoral artery. Should one operate on patients with claudicatio intermittens below or rather above 200 metres? Should one operate only on patients with pain while resting? Is peripheral necrosis the only indication for surgery? Should one favour PTA or bypass? Is PTA sufficient or should PTA be supplemented by stenting?

Storm surges in the Beaufort Sea present a severe problem for navigation as well as for offshore oil drilling activities. Influence of ice cover on storm surges in the Beaufort Sea is examined making use of a numerical model as well as a set of observations. The automated shallow-water model of Henry has been modified to incorporate ice cover and is adapted to the Beaufort Sea. The leading edge of the permanent ice is calculated from the loci of identifiable points. Generalized similarity theory is employed to compute wind stresses. Simulations are made using model-predicted ice concentrations and observed ice concentrations. Ice motion is relatively small in units of model grid distance (approximately 18 km) during surges. Spherical effects are important and should be included in future adaptations of the model. Comparison of the computed surges with observed surges for eight different events showed reasonable agreement.