Khan Academy ‘Artificial leaf’ makes fuel from sunlight Researchers led by MIT professor Daniel Nocera have produced something they’re calling an “artificial leaf”: Like living leaves, the device can turn the energy of sunlight directly into a chemical fuel that can be stored and used later as an energy source. The artificial leaf — a silicon solar cell with different catalytic materials bonded onto its two sides — needs no external wires or control circuits to operate. Simply placed in a container of water and exposed to sunlight, it quickly begins to generate streams of bubbles: oxygen bubbles from one side and hydrogen bubbles from the other. The creation of the device is described in a paper published Sept. 30 in the journal Science. The device, Nocera explains, is made entirely of earth-abundant, inexpensive materials — mostly silicon, cobalt and nickel — and works in ordinary water. “I think there’s going to be real opportunities for this idea,” Nocera says.
Dark Stories - Histoires macabres et inexplicables - Récits insolites, mythes et légendes SlushBox.com: Lowbrow and Punk art you didn't even know you wanted Hydrogen produced by earth friendly WINDHUNTER Maritime Hydrogen Generation... - StumbleUpon Wikiversité H-Line Conversions - Hummer H1 & H2 Diesel and Green Fuel Conversions - Wichita, Kansas Facebook sienta las bases para ser el nuevo Google Mientras el presidente de Google, Eric Schmidt, defendía el pasado miércoles ante el senado de EE UU la imparcialidad del algoritmo de su buscador, Mark Zuckerberg ultimaba el anuncio del mayor giro estratégico de Facebook desde que se lanzara en 2006. La red social, con 800 millones de usuarios en el mundo, ha dejado de ser un sitio que solo conecta a personas para pasar a ser, además, una plataforma que conecta a la gente con las cosas que recogen su actividad diaria (servicios de música, cine, periódicos...). Un cambio que, aunque pueda parecer nimio sobre el papel, deberá preocupar a Google y a Apple, porque como el famoso caballo de Troya, el anuncio de Facebook esconde armas para dar la batalla a ambos rivales. Y a cada uno donde más le duele: al buscador, en la publicidad, y a Apple, en los contenidos. Igualmente, ahora, además de "me gustas" en otro sitios que luego aparecen en Facebook, se puede hacer cosas y que aparezcan "verbos" y "objetos directos". Información muy útil
Liens Utiles, plus de 50 000 références pour tout connaître ! Lightning Lithium Superbike: No Emissions Remember the electric Killacycle? Lightning Motors' electric motorcycle is similar, but it's made for the street instead of the racetrack. It goes 0-60 in around 3 seconds, hits close to 100 mph at top speed, and has about a 100-mile range at cruise. Unlike the Tesla electric sport car, which is powered by thousands of tiny batteries, the R1 conversion uses just 28. The Lightning Lithium is, after all, just a prototype — an idealistic vision of what could be. Within a couple years, the two hope to make a comparably priced production version of the bike using a custom chassis, as well as a smaller, less powerful $6,000 to $8,000 model. Via: LA Times
Flexbook – Laptop Concept by Hao-Chun Huang Flexible Notebook Has Sexy Features I call myself a concept technology glutton because I can devour the most bizarre and hypothetical features, in the hope that someday we will make those advances and sexy, psycho gadgets will rule! My hope is kept alive with concepts like the Flexbook that sports key features like a flexible joint that allows you to fold and configure the laptop to become tablet or a notebook in a jiffy. Specs include a waterproof keypad, swappable rubber skins, 21:9 – 180-degree swivel touch screen that make it an eBook, tablet and notebook in one go. I’m so happy! Designer: Hao-Chun Huang This Fujitsu concept is a part of the Fujitsu Design Award that was organized by Designboom.
Dimensions Accueil Un film pour tout public. Neuf chapitres, deux heures de maths, pour découvrir progressivement la quatrième dimension. Vertiges mathématiques garantis! Trouvez des informations supplémentaires pour chaque chapitre : voir "En détail". Cliquez sur l'image à gauche pour voir la bande-annonce (branchez vos haut-parleurs). Ce film est diffusé sous une licence Creative Commons. Maintenant avec encore plus de langues de commentaires et sous-titres : Commentaires en allemand, anglais, arabe, espagnol, français, italien, japonais et russe. Film produit par :Jos Leys (Graphiques et animations)Étienne Ghys (Scénario et mathématiques) Aurélien Alvarez (Réalisation et post-production)