Descripción: “...In order to optimize the return cycles, people has believed that it is only necessary to study the direct logistics of products since they leave the cEDI until they arrive at the stores, consequently, only half of the problem is being studied. retailers must guarantee to their supplier that the plastic containers return so that he can pack his products again, that is to say, to study inverse or reverse logistic, a new fundamental concept for all those companies that they have consciousness about environment and they worry about the recovery of products at the end of their life utility. ...”

Descripción: “...Se evidencia la existencia de factores generadores  de violencia y factores protectores  al interior de las familias de los escolares.Palabras Clave: Escolar Adolescente, Representaciones Sociales, Interrelaciones familiares, Factores Generadores de violenciaABSTRACT: The study describes the characteristics of family structure, family vital cycle and family tipology of families of school in ages of 10  - 12 years, of class social half drop and the family interrelations  to the interior of its homes,  from the interpretation  of those  “social representations” that have the scholars of its family life. The objective was to evidence generating factors of violence that rebound in aggressive behaviors against partners and professors in the school  Manuela Beltrán of the city of Villavicencio. ...”

Descripción: “...According to variables like physicochemical parameters, water quality, water conservation and the importance of water for life, Subsurface Flow Wetlands (SFW) are a cheap and viable alternative because of their low operational requirements and their efficient results for water decontamination when water has been affected by wastewater from urban centers. ...”