RESUMEN
The classical description of porous media as a homogeneous equivalent fluid is presented, and its foundations on the homogenization method is introduced and applied to the numerical prediction model for a periodic porous medium composed by face centered cubic sphere packing on which measurements have been made. The results are compared with existing numerical results in the literature and with new and experimental data.
RESUMEN
It is presented the case of a 37-year-old man with diagnosis of junctional nevus malignant with aspect of nodular melanotic melanoma level V Clark with regional lymph node invasion who would be classified as III stage in T.N.M. classification. Remark on importance for diagnosis of malignancy the history of recently modification of congenital tumor and the local examination. Also, on remark the favourable evolution after an oncologic surgical treatment--wide surgical excision of lesion completely (in condition of negatives histopathologic tumor markers of prognostic) with prophylactic regional lymphadenectomy with curative intention. The excellent result 7 years after the surgical treatment determined us to present this case.