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Designing optimal trajectories for a skimmer ship to clean, recover and prevent the oil spilled on the sea from reaching the coast

function considering OPT-0- (4) ) was approximately 2.413e+10. The optimal trajectories found at the end of these experiments and the distribution c w ( x ) = ∫ 0 T $\begin{array}{} \int_0^{T} \end{array}$ coef( x ) c ( τ , x )d τ , are shown in Figures 7 and 8 . c w ( x ) is a parameter that measures the weighted concentration which have been at point x through the time interval [0, T ]. The final values of the objective function (4) and the reduction in percentage of this value with respect to the scenario without pumping are given in Table 2 . In

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A model for the operations to render epidemic-free a hog farm infected by the Aujeszky disease

transmission between herds has been described [ 3 ]. Several risk factors resulted associated with the infection in different studies. These risk factors are related to management and herd characteristics such as pig production cycle, gilts replacement, herd size, animal density, vaccination schemes, biosecurity measures. Other risk factors are related to the geographic area such as AD occurrence, animal and herd density, pig transports, pork industry, feral pigs presence [ 1 , 8 , 9 , 10 , 11 , 14 , 16 , 17 , 18 ]. The infection causes severe economic losses to

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