Descripción: “...It allows to value objectively the sportive performance of each player or team at defensive, at offensive, at and goal site. It gives the necessary elements to calculate the teams’ performance after each championship ( the SOCCEFIN ). ...”

Descripción: “...It is therefore necessary to understand treatment systems’ hydraulic behavior by using tracer substances in order to determine flow behavior: piston, complete mix, dispersion; the existence of dead zones, short circuits, advective flows, and real hydraulic retention time. The goal of this article is to model the hydraulic behavior of a UASB (Upflow Anaerobic Sludge Blanket) system through a tracer test using rhodamine WT and the stimulus-response technique. ...”

Descripción: “...As we demonstrate difficulties from students when they listen, talk, read and write; it was organize a methodological guide that make possible to obtain the goal through some experiences of blog use as educative way of learning and developing their communicatory skills. ...”