sábado, 31 de octubre de 2009
viernes, 30 de octubre de 2009
Frase del Día 30 Octubre
jueves, 29 de octubre de 2009
Baterías de líquidos, una alternativa ecológica...

Esta batería es distinta a cualquier otra. Los electrodos son metales fundidos y el electrolito que conduce la corriente entre ellos es una sal es una sal fundida. Esto da lugar a un dispositivo excepcionalmente potente, capaz de absorber con rapidez grandes cantidades de electricidad. Los electrodos pueden funcionar a corrientes eléctricas "decenas de veces más elevadas” que cualquier otra batería que haya sido medida hasta la fecha, señala Donald Sadoway, profesor de química de los materiales del MIT y uno de los inventores de la batería. Además, los materiales son baratos y el diseño permite un proceso de fabricación simple.
Fuente: Technology Review
[English Version]
Without a good way to store electricity on a large scale, solar power is useless at night. One promising option for storage is a new type of battery materials made of liquid assets. The prototypes suggest that these fluids batteries cost less than a third of what they cost the best batteries today and could last much longer.
This battery is unlike any other. The electrodes are molten metal and the electrolyte that conducts current between them is a molten salt is a salt. This gives rise to a uniquely powerful device, able to quickly absorb large amounts of electricity. The electrodes can operate at electrical currents "tens of times higher" than any other battery that has been measured to date, says Donald Sadoway, professor of materials chemistry at MIT and one of the inventors of the battery. Also, materials are cheap and the design enables a simple manufacturing process.
The first prototype consists of a container surrounded by insulating material. The researchers added molten material: antimony in the background, an electrolyte such as sodium sulfide and magnesium in the medium above. Since each material has a different density, are kept in different layers of natural form, simplifying the manufacturing process. The container also acts as current collector, which transmits electrons from a power source, like solar panels, or transported to the power grid to deliver electricity to homes and businesses.
Source: Technology Review
Frase del Día 29 Octubre
"Para tener éxito hay que tener amigos; pero para mantener mucho éxito hay que tener muchos amigos."
Frank Sinatra
miércoles, 28 de octubre de 2009
Frase del Día 28 Octubre
martes, 27 de octubre de 2009
Torturando los datos hasta que confiesen!!!

El software utiliza todos los registros guardados de cada evento en cada juego: pases, encestos, rebotes y doble marcaje a un jugador por el equipo contrario, entre otros. El objetivo es ayudar a los entrenadores a aislar eventos que no detectan cuando observan el juego en vivo o en película.
[English Version]
An interesting result was one hitherto observed by the coaches of the New York Knicks. The double marking a player can usually provide an opportunity for another player to score more easily. However, when the Chicago Bulls were playing the Knicks, it was found that the percentage of baskets after the Knicks center, Patrick Ewing, he did double staining was extremely low, indicating that the Knicks were not reacting properly to the double markings. To find out why, the coaching staff carefully studied all the movies in games against Chicago. They noted that the Chicago players broke their fast double labeling so they could cover up the shooting guard the Knicks open before preparing to make his shot. With this knowledge, the trainers created alternative strategies for dealing with the double marking. - Ing. Esp. Roberto Camana Fiallos.
Frase del Día 27 Octubre
"Cuantos hombres se precipitan hacia la luz, no para ver mejor sino para brillar."
Federico Nietzsche
lunes, 26 de octubre de 2009
Frase del Día 26 Octubre
"El más terrible de todos los sentimientos es el sentimiento de tener la esperanza muerta."
Federico García Lorca