Crisis energética: El futuro de los combustibles fósiles (Energy Crisis: The Future of Fossil Fuels)

From art and architecture to politics, philosophy, and mathematics, "western civilization" owes a great deal to the achievements of ancient Greece, but what do we really know about this long-gone civilization? How did geography influence the politics of the Greek city-states? What's the difference between an agora and an acropolis? This book takes readers several thousand years into the past, when independent city-states ruled the Mediterranean Sea, to find the answers. Full-color photographs and maps, accompanied by accessible text, introduce readers to the many contributions the ancient...

The need for speed is the motivating factor in this engaging, Spanish book. Readers learn the history of travel from the very slow to the supersonic and beyond, including everything in between. They learn and discover the factors that influence motion for all types of vehicles: land, air, and water alike. They also learn different ways to measure speed and read about energy uses for different vehicles. With greater speed comes greater risk. Readers learn how engineers are always seeking new and better ways to keep people safe as they travel faster and go farther.

Have you ever wondered where inventors get some of their ideas? This answer may surprise you: sometimes the inspiration comes from plants! Learn how some tiny plants have made a huge difference in the world.

"In this title, children explore the reasons why they may feel embarrassed, how to recognize feelings of embarrassment, and appropriate action to take when they feel embarrassed."

Ante la importancia de la educación como base de la competitividad en una economía basada en el conocimiento, las universidades han incrementado su atención en la calidad de sus programas de doctorado. Sin embargo, se aprecia que aún son escasas las instituciones educativas que tienen en su programa, una asignatura destinada a cómo escribir y publicar una tesis doctoral. Este libro es el resultado de varios años de experiencia en supervisión de tesis doctorales en programas de diversas universidades. Los contenidos y la estructuración de los mismos han sido contrastados con alumnos y...