Descripción: “...Finally, some scenarios were carried out in terms of amount, duration, source and rate debt, and estimated the value of the company and the change in the Weighted Average Cost of Capital (WACC), based on two ditferent scenarios. 1) Maintaining the same level of perceived risk (same rating) and 2) Changing rating – increasing leverage but decreasing the WACC. ...”

Descripción: “...Utilizando el principio de equivalencia masa-energía de la teoría especial de la relatividad construimos un modelo para describir la interacción de la materia con la energía.Utilizamos este esquema para estudiar el efecto fotoeléctrico y la dispersión de Compton, obteniendo los mismos resultados predichos por la teoría cuántica antigua y la electrodinámica cuántica.AbstractUsing the principle of mass-energy equivalence based on the special theory of relativity we built a model to describe the interaction of matter with energy.We used this scheme to study the photoelectric effect and the Compton dispersion, obtaining the same results found in the old quantum theory and quantum electrodynamics. ...”