In Björn Larsson’s novels and essays, Northern seas are experienced as one example of what the sea can offer human beings in terms of freedom from any boundaries and intimate relation with nature; at the same time, however, since his first literary attempts Larsson seems to have pointed out (or built up) an expansion of the Northern dimension when approaching life by and on the sea: this broader image has much to do with the traces of ancient Celts’ culture, as well as with his characters’ destinies and ambitions and, not least, his own accounts for real sea experiences. This paper provides meaningful examples of Larsson’s attitude and contribution to the representation of the Northern Sea, while reflecting on the role of the sea in his works.
17On-board measurement methodology for the liquid-solid slurry production of deep-seabed mining
On-board measurement methodology for the liquid-solid slurry production of deep-seabed mining
2An Improved Two-Scale Method for Simulating the Backscattering of Random Rough Surfaces
Fractal geometry function provides a practical way to simulate natural rough surface for electromagnetic scattering calculation of microwave remote sensing. In our study, we generate three-dimensional random rough surface based on band-limited Weierstrass-Mandelbrot model and carry out a series of quantitative analyses of the relation between fractal parameters and rough surface parameters. In order to eliminate the artifical reflection from the truncated boundary of rough surface model, a tapered incident wave model is built to illuminate the surface profile model with the use of sampling strategy. The tapered incident wave is introduced into the classical Two-Scale Model to calculate backscattering coefficient. The proposed model is applied to simulate the scattering of sea clutter based on the fractal sea surface model. Its simulation results are compared with real sea surface scatterometer measurement experiments in Beihai, Guangxi province and the overall deviation is less than 10%. The results validate the efficiency of the proposed model in obtaining the scattering simulation data on sea surface for parameter inversion of active microwave remote sensing.
Read more25A numerical study on the vortex-induced vibration of flexible cylinders covered with differently placed buoyancy modules
A numerical study on the vortex-induced vibration of flexible cylinders covered with differently placed buoyancy modules
1Wave energy plants - the way forward
Successful large-scale implementation of offshore wave energy converters can only be achieved in stages. The technology development requires funding and a multi-disciplinary open co-operation. Practical engineering experiments and real sea experience combined with generic R&D investigating feasibility, reliability and survivability of larger units must gradually select the device types and principles best fit for offshore operation and commercial production. Existing expertise from cognate industries, such as offshore engineering, must be employed whenever possible. (5 pages)
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