Descripción: “...En este artículo se describe el comportamiento de un pulsador elevador (Boost), este circuito de amplio uso a nivel industrial exhibe un comportamiento no lineal en virtud de su sistema de conmutación, se obtienen y simulan las ecuaciones diferenciales no lineales que describen el comportamiento del circuito con Simulink/MatLab y mediante el algoritmo de Runge Kutta. ...”

Palabra clave: “...Boost...”

Palabra clave:

Descripción: “...El dispositivo que captura y entrega esta energía es un convertidor DC-DC bidireccional ubicado entre el motor y la batería, el cual se encuentraconectado en paralelo con un convertidor Boost que opera como un seguidor del punto de máxima potencia para aprovechar eficientemente la energía entregada por el PV. ...”

Descripción: “...It shows than inmigrants in different cities do not find employment in modern economy; in this case, inmigrants look for subemployment.The next theory relates the underground economy and its incomes, shows that uneven incomes and high costs are translated  in obstacles to generate formal enterprises in the same way, regarding good and services demand and consumer low budgets prompt  background economy marketing.Another theory, claims the background economy as a result of the official system relates to the regulations and absence at regulations. These ones, boost permanence and rising of background economy.A background economy definition is presented taking account some works carried out by OIT and about  its concept: evolution in Colombia, to reach an average of the theory and main problems of the  background economy in Villavicencio. ...”

Descripción: “...Various representatives of the colombian educational system, and in particular higher education, agree in accepting that requires a change in the law 30 to transform the reality of the past 18 years, this gives rise to some questions and suggestions from the reform project that is available for the national discussion and which proposes an intervention to boost the sustainability of the aims expressed in more and better students, young colombians, making part of the higher education in Colombia to confront a changing world and without borders. this is summarized in the questions: do raised project incorporates the actions necessary and sufficient to achieve the transformation of the results of higher education? ...”