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Sieving is one of the most used operational methods to determine sand size parameters which are essential to analyze coastal dynamics. However, the influence of hand versus mechanical shaking methods has not yet been studied. Herein, samples were taken from inside the hopper of a trailing suction dredger and sieved by hand with sieves of 10 and 20 cm diameters on board the dredger. Afterwards, these same samples were sieved with a mechanical shaker in the laboratory on land. The results showed differences for the main size parameters D50, standard deviation, skewness, and kurtosis. Amongst the main results, it should be noted that the highest values for D50 and kurtosis were given by the small sieves method. On the other hand, the lowest values were given by the mechanical shaker method in the laboratory. Furthermore, standard deviation and skewness did not seem to be affected by the sieving method which means that all the grainsize distribution was shifted but the shape remained unchanged. The few samples that do not follow these patterns have a higher percentage of shells. Finally and definitely, the small sieves should be rejected as a sieving method aboard.

Une décision judiciaire est toujours le résultat d’une étrange construction. Les faits s’interpellent l’un l’autre, se conjuguent, se valorisent et finalement éclosent en droit. C’est ce jeu du fait et du droit, cette mise à nu du raisonnement judiciaire que nous avons voulu pratiquer à propos de la jurisprudence relative à la qualification de la vente à tempérament. Mais l’analyse ne s’arrête pas là et renvoie le lecteur à des questions essentielles : Et si le jeu avait des règles, … ? S’il était possible de systématiser ces règles, … ? Mieux., l’outil informatique ne pourrait-il à la limite révéler des moments de nécessité dans le droit et dès lors “prédire” le droit ?