Descripción: “...For the calculation of VaR with econometric GARCH models, ARIMA methodology is applied to find the model that will help to forecast the returns of the series, this returns does not generally have a constant variance, showing the existence of heteroscedasticity and should be used generalized autoregressive conditional heteroscedasticity models (GARCH), such as PGARCH, TGARCH EGARCH, and other models as IGARCH, GARCH-M to find the conditional variance. ...”

Descripción: “...Research is proposed to find the errors made when the adaptive correction of the eye in the city of Pereira Methodology: quantitative study, descriptive and exploratory exposfacto, the sample is 3 laboratories and 59 ophthalmic optics in the city of Pereira. ...”

Descripción: “...The tissue engineering has developed skin substitutes that promote skin regeneration; however, it is imperative to find materials that allow fibroblast growth in order to find an appropriate skin substitute. ...”

Descripción: “...El análisis que se realiza en este documento tiene como finalidad encontrar si en la racionalidad del accionista colombiano está presente la jerarquización de sus fuentes de financiación, aporte básico de la teoría de Pecking Order, o si sigue un modelo de balance de costos enfrentado a beneficios de la deuda explicado por la teoría de Static Tradeoff o, si por el contrario, no existe un comportamiento de los accionistas que se ajuste a estas teorías.Abstract: The analysis that is made in this paper has as a purpose to find if in Colombia the shareholder rationality has into account the hierarchical order of the financing sources, which is the main contribution of the Pecking Order Theory, or if cost balance model versus debt benefits is followed, which is explained for the Tradeoff Static Theory, or if, on the contrary, there is not a shareholder behavior related with this theories. ...”

Descripción: “...During the last years the concept of pets in society has changed, promoting the household to consider them as another member of the family. But owners find some problems during their care because they have personal occupations like work and study .One of these problems are the feeding during the absence of the master. ...”