Mujeres en las ciencias (Women in Science)

For thousands of years, militaries around the world were limited to male soldiers. However, throughout history, brave women have stepped out of the background and onto the battlefield. This biographical text covers the important women who’ve broken ground in the military. Famous historical figures such as Joan of Arc, Clara Barton, and Florence Nightingale are covered in depth, while the stories of modern-day heroes are presented to show how women are still affecting change on the front lines. A comprehensive timeline, fact boxes, and historical and modern images complete this...

With exciting, brilliant photography this exciting book discusses how some sharks come from eggs while others do not.

This engaging volume takes a close look at the legend of Joaquin Murrieta, the man who came to be known as the Robin Hood of Eldorado. Dynamic text tells the story of Murrieta, with plenty of exciting age-appropriate details, but also examines the complex relationship between fact and fiction in legends such as his. Interesting and informative historical background on the California Gold Rush and the role of Mexicans and Californios in the area at the time round out this fun and informative volume.

Esta cuarta edición expone los fundamentos de las señales y sistemas discretos en el tiempo y procesamiento digital de señales. Este texto es adecuado para estudiantes de Ingeniería eléctrica, ingeniería informática y Ciencia de la computación.

"En el bosque, debajo de la tierra, a través de las nubes o las flores, surcando los ríos o los mares o bajando los montes, se escucha un poderoso rumor; son las criaturas que habitan el universo y cuya presencia se siente a medida que se avanza entre las estrofas de este poema hasta convertirse en un rugido incontenible."--P. [4] of cover.