The goal of this work is to study the influence of the contact force model, contact geometry, and contact material properties on the dynamic response of a human knee joint model. For this purpose, a multibody knee model composed by two rigid bodies, the femur and the tibia, and four non-linear spring elements that represent the main knee ligaments, is considered. The contact force models used were the Hertz, th...
We retrospectively studied seventeen cases of acute mastoiditis admitted to the Paediatric Ward of S. Francisco Xavier Hospital during 8 years and 8 months. Seven patients were admitted in 1995. We found no reason for this increase. Eleven children were male and 5 were under 2 years of age. All cases, except one of post-traumatic mastoiditis, occurred after acute otitis media. Only 5 children referred symptoms ...
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