C lculo de p¢rticos de varios pisos

South American camelids (Llamas, Alpacas, Vicuñas and Guanacos) are receiving increased interest not only in South America but also on a worldwide scale. They possess some unique features such as their fine fibre and healthy meat, and their high adaptivity to many climatic regions across the world. Apart from the important productive aspects, their physical attractiveness and friendly temperament also makes them popular as pet animals. There are still many gaps in the scientific literature with regard to South American camelids. In part, this gap can be diminished by this collection of...

Pocos discutirán que el mundo atravieza la peor crisis desde la Gran Depresión con millones de personas sin empleo. Por eso es oportuno plantearnos qué va a pasar en el futuro con el empleo. El libro se no refiere a lo que vaya a suceder dentro de 4 o 5 años sino a cuál será el panorama que tendremos dentro de 20 o 30.Desde luego nadie tiene la bola de cristal que le permita decir, con un mínimo de rigor, qué es lo que va a suceder. Aunque depende de muchos factores, se destacan varios: los avances científicos y tecnológicos, que destruirán empleos de unos tipos y crearán de...

The second meeting of the OSPESCA/WECAFC/CRFM/CFMC working group on Caribbean Spiny Lobster took place in Santo Domingo, Dominican Republic, from 21 to 23 March 2018. The status of the Caribbean spiny lobster fishery was presented in the subregions of OSPESCA and the CRFM, as well as in Brazil, Cuba, the United States and Mexico. Delegates also learned about the progress in the implementation and definition of indicators of subcomponent 4A related to spiny lobster in the CLME + Strategic Action Plan and the preparation and contents of the SOMEE Report. A new expanded and updated proposal of a ...

Els principis bàsics i les eines de treball fonamentals de l'anàlisi de circuits i teoria de xarxes lineals s'exposen en aquest llibre d'una manera senzilla però amb el rigor i la lògica imprescindibles en un manual docent. l'estructura del llibre permet avançar gradualment i tractar temes com els senyals, les lleis de Kirchhoff o les xarxes amb tres i quatre terminals, per arribar a conceptes de corrent alterna, transitòria i anàlisi espectral. Tots els capítols inclouen una mostra de problemes resolts.