Los pensadores siempre han tenido una influencia muy importante a la hora de plasmar y llevar adelante sus reflexiones sobre existencia contingencia. Jacques Maritain es uno los filósofos más cercanos fe cristiana del siglo XX. Su vida, trayectoria e ideas influenciado en diversos pontificados, especialmente Giovanni Battista Montini (Pablo VI). Influyó Doctrina social Iglesia el proyecto polít...

Citation: Fieth RA, Gauthier M-EA, Bayes J, Green KM and Degnan SM (2016) Ontogenetic Changes in the Bacterial Symbiont Community of the Tropical Demosponge Amphimedon queenslandica: Metamorphosis Is a New Beginning. Front. Mar. Sci. 3:228. doi: 10.3389/fmars.2016.00228 Ontogenetic Changes in the Bacterial Symbiont Community of the Tropical Demosponge Amphimedon queenslandica: Metamorphosis Is ...

We introduce a new method for the design of observers for nonlinear systems using backstepping. The method is applicable to a class of nonlinear systems slighter larger than those treated by Gauthier, Hammouri, and Othman [IEEE Trans. Automat. Control, 27 (1992), pp. 875– 880]. They presented an observer design method that is globally convergent using high gain. In contrast to theirs, our obser...

We analyze a hyperbolic system of conservation laws in dimension one, which is a drastic simplification of a multi-phase or multi-velocity fluid model. The domain of hyperbolicity is compact, which is a characteristic of multi-phase models. Our main result is the stability of the domain of hyperbolicity. Due to the degeneracy of the model on the boundary of the hyperbolicity domain, rarefaction...