The essay is addressed to all people who have inquired about the true history of humanity. Many researchers have looked for ways to check the aspects of the mother tongue, but they did not achieve it because of their orthodox preconceptions, th..

The objective of the work is to evaluate the different interrelationships that exist between social and environmental variables with respect to the quality of surface waters. It is divided into nine chapters that address theoretical and practic..

"Robby is a robot girl from the planet Proxima Centauri b, who came to do a homework on theplanet Earth. After flying around the world, a very small country caught his attention.in Central America: Costa Rica. He fell in love with the great biodivers..

Science and technique in nineteenth-century Costa Rica, written in a pleasant and clear, presents the contribution of great characters of the nineteenth century and highlights the advantages of education as a determining factor in the course ..

The seismic codes collect, synthesize and order sets of norms and practices of earthquake-resistant design, product of scientific knowledge, technological praxis, the experience of past earthquakes and common sense, which guide and guide the ..

This publication contains the theoretical basis with which it is possible to design the elements involved in applying this technique: the sizing of the tank and the infiltration field (ditches or wells), according to the size of the populatio..

This publication is oriented towards the understanding of the fundamental principles of agricultural drainage, both superficial and underground, as well as showing some practical tools that have been applied successfully in the solution of pr..

Este texto tiene como principal propósito fungir como texto principal en cursos de simulación en carreras de ingeniería y de administración a nivel de grado o de posgrado en universidades públicas y privadas. En esta segunda edición se han generado n..