Neptune's Pride. Explore, Expand, Exploit, Exterminate! "De simples machines" - Jeux de physique pour les enfants - Cité des sciences et de l'industrie - un lieu Universcience Produit par la Cité des sciences, un lieu universcience, le site en Flash « De simples machines », est un ensemble de 6 modules ludo-éducatifs destinés aux enfants de 8 à 12 ans, sur le thème des machines simples : plans inclinés, vis, leviers, coin, roue, poulies, engrenages. Objectifs du site : faire comprendre, de manière drôle et ludique, l’importance des machines simples qui sont la base de toute machine complexe montrer que ces machines simples sont utilisées au quotidien et nous sont bien utiles introduire des notions de physique sur le déplacement d’un objet, les forces résistantes et motrices, le centre de gravité, l’équilibre… favoriser l’observation, la simulation, l’expérimentation grâce à une forte interactivité et aux nombreuses séquences animées qui mettent en scène les choix de l’utilisateur. Description de la page d'accueil : Le film : Là, tu peux voir un film d’animation qui parle des machines simples. Les plans inclinés : Les leviers : La roue et la poulie : Le quiz :
TOKTalk.net voidhaze's Home Scientific Comic Books. Free Downloads Free Downloads L'équipe de Savoir sans Frontières, au grand complet : Jean-Pierre Petit Gilles d'Agostini Plus vingt ans d'amitié Merci à nos lecteurs ! La connaissance est le fondement de la liberté, car une fois donnée elle ne se reprend plus albums à télécharger en 36 langues. près de 440 traductions 91 traducteurs travaillent pour développer Savoir sans Frontières, en trente six langues. Personnel de l'association Savoir sans Frontières : deux personnes : Jean-Pierre Petit et Gilles d'Agostini, trésorier Les fichiers ne sont pas téléchargeables à partir de certains pays, comme le Chine. Rétribution des traducteurs : Traductions en "texte seul" : 120 euros nets En assurant la mise sous forme graphique : 180 euros nets Avant d'entreprendre une traduction, contactez-nous Pour télécharger les pages sans texte : Traducteurs : Attention à l'orthographe ! Ne traduisez pas au "mot à mot". Fournissez-nous un travail entièrement finalisé. Nouveautés et : se
Does life have a purpose? – Michael Ruse One of my favorite dinosaurs is the Stegosaurus, a monster from the late Jurassic (150 million years ago), noteworthy because of the diamond-like plates all the way down its back. Since this animal was discovered in the late 1870s in Wyoming, huge amounts of ink have been spilt trying to puzzle out the reason for the plates. The obvious explanation, that they are used for fighting or defence, simply cannot be true. The connection between the plates and the main body is way too fragile to function effectively in a battle to the death. Another explanation is that, like the stag’s antlers or the peacock’s tail, they play some sort of role in the mating game. Señor Stegosaurus with the best plates gets the harem and the other males have to do without. But this essay is not concerned with dinosaurs themselves, rather with the kind of thinking biologists use when they wonder how dinosaur bodies worked. Why do we still talk about organisms and their features in this way? Daily Weekly Biology
A little hand, big idea :-) by James You will need some fine settings on your printer to print the 60% scale hand. The model pictured is 100% and prints easily with .25mm layers. But for 60% I used 0.18 layer and 0.3mm extrusion width with 12-18mm/s feed rates. After the print finishes you need to cut off the support pads some are circular others are rectangular. You will need some fishing line 0.5-0.8mm dia and 1.5-2mm dia self-tapping screws. not easy to get but available, go to a hobby store. The wrist and thumb base parts I recommend screwing together for initial assembly, then when it all works well glue and screw it together. The tips are a separate print because I printed them hollow, 0.3mm wall thickness with soft pliable PLA, any printable plastic will do though. Once it’s together thread 5 lengths of fishing line through each finger and tie knots in the end to retain them (I'm working on the components to connect these lines to but for now just tie them to rings for your fingers to control the hand).
Savoirs Jeunes - Banque des Savoirs - Essonne Marcus du Sautoy Marcus Peter Francis du Sautoy, OBE (born 26 August 1965)[5] is the Simonyi Professor for the Public Understanding of Science and a Professor of Mathematics at the University of Oxford. Formerly a Fellow of All Souls College, and Wadham College, he is now a Fellow of New College. He is President of the Mathematical Association. He was previously an EPSRC Senior Media Fellow and a Royal Society University Research Fellow. His academic work concerns mainly group theory and number theory. Life and career[edit] In December 2006, du Sautoy delivered the 2006 Royal Institution Christmas Lectures under the collective title The Num8er My5teries. Du Sautoy is an atheist, but has stated that as holder of the Simonyi Chair for the Public Understanding of Science his focus is going to be "very much on the science and less on religion Popularisation of mathematics[edit] He is known for his work popularising mathematics. Personal life[edit] Du Sautoy was a post-doc at the Hebrew University. Work[edit]
High-voltage engineers create nearly 200-foot-long electrical arcs using less energy than before (Update) Photos taken by the researchers show plasma arcs up to 60 meters long casting an eerie blue glow over buildings and trees at the High Voltage Laboratory at the University of Canterbury in New Zealand. A team of engineers at Canterbury University in New Zealand has developed a method to create nearly 200-foot-long electrical arcs -- visible currents of electricity traveling through air that has been broken down into electrically charged particles. Others have created longer arcs, but the traditional technique requires large amounts of energy in order to break down the air. The new technique requires much less energy. Daniel Sinars, who researches fusion at Sandia National Laboratory in Albuquerque, N.M., has also worked with exploding wires, but at a much smaller scale. "It's hard to make a plasma that size," said Sinars. The team occasionally created plasma arcs during other exploding wire experiments and pursued the new research in order to better understand how the arcs formed.
Algodoo