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J’ai découvert la fontaine de jouvence de nos neurones | CLES
Nous l’avons toujours entendu dire : les neurones de notre cerveau sont en nombre limité, ils ne se renouvellent pas, et à partir de l’âge adulte nous en perdons chaque jour, irrémédiablement, des quantités. Nous croyons encore presque tous qu’il en est ainsi, car tel fut, durant des décennies, le dogme scientifique. Aujourd’hui, voilà une connaissance périmée. On sait à présent que nos neurones peuvent se régénérer – et que de nouveaux peuvent constamment apparaître. Cette découverte […] ouvre des perspectives thérapeutiques étonnantes.Future - Science & Environment - Sucking CO2 from the skies with artificial trees
Removing this pollution from power plants – called carbon capture and storage – is a useful way of preventing additional carbon dioxide from entering the atmosphere as we continue to burn fossil fuels. But what about the gas that is already out there? The problem with removing carbon dioxide from the atmosphere is that it’s present at such a low concentration. In a power plant chimney, for instance, carbon dioxide is present at concentrations of 4-12% within a relatively small amount of exhaust air. Removing the gas takes a lot of energy, so it is expensive, but it’s feasible. To extract the 0.04% of carbon dioxide in the atmosphere would require enormous volumes of air to be processed.
L'alimentation représente environ 30% de l'empreinte écologique d'un Français ( Hails, 2008 ). Les pratiques agricoles, les circuits de distribution, les emballages, les pollutions entrainées par certaines pratiques, etc. pèsent sur l'environnement. Si l'agriculture biologique apparait souvent comme une alternative, elle reste encore minoritaire et son coût empêche de nombreux consommateurs d'en bénéficier.
9 questions pièges du développement durable
Zep'lin concept design by Damien Grossemy Image Gallery (4 images) A boat that flies. Now there's a vehicle Phileas Fogg could really have used. Zep'lin is a blue-sky concept developed by industrial designer Damien Grossemy during a five month internship at Renault which imagines the use of solar panel sails and electric propulsion to liberate the yacht-like vehicle from terra firma.
Zep'lin flying boat ponders the future of electric vehicles
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La verticalité fascine et ne semble offerte comme moyen d’expression qu’à la starchitecture. En organisant depuis 2006 un concours de gratte-ciel, le magazine Evolo promet de révéler de jeunes talents. Virtuosité et création - en témoigne ce projet urbain hallucinant à Marseille - sont à l’honneur pour ces équipes françaises primées en 2009 et 2010.
Gratte-ciel : une typologie pour un exercice de style
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This article is reproduced from here . For some reason it has been taken down from his blog… I have the intention of writing this very post on this blog, and I may well still do so, but for now here is someone else’s… Just to be clear, this is not a scam! It is, however, a really good example of really sloppy journalism.
Blog Archive » Solar-panel “trees” really are inferior (or: “In which hopelessly inept journalists reduce me to having to debunk a school science project”)
13-Year-Old Makes Solar Power Breakthrough by Harnessing the Fibonacci Sequence Aidan Dwyer's Solar Power Breakthrough Using the Fibonacci Sequence – Inhabitat - Green Design Will Save the World
To see why they branch this way he built a small solar array using the Fibonacci formula, stepping cells at specific intervals and heights. He then compared the energy output with identical cells set in a row. While most 13-year-olds spend their free time playing video games or cruising Facebook, one 7th grader was trekking through the woods uncovering a mystery of science. After studying how trees branch in a very specific way, Aidan Dwyer created a solar cell tree that produces 20-50% more power than a uniform array of photovoltaic panels .
Google et son véhicule robot n’ont qu’à bien se tenir. L’entreprise française Induct expérimentera bientôt son véhicule Cybergo , à conduite automatique et complètement autonome en énergie, en plein cœur de La Rochelle. Un face à face avec les américains Il faut dire que Cybergo a déjà un passif outre-Atlantique.
La Rochelle va accueillir le premier véhicule urbain sans chauffeur au monde
A cheetah running in its natural environment is an elegant, fluid display of biomechanics. What if robots could run the same way, and be deployed for search and rescue operations in areas where conventional vehicles cannot go? According to University of Delaware assistant professor Ioannis Poulakakis, a large fraction of the Earth's surface remains inaccessible to conventional wheeled or tracked vehicles, while animals and humans traverse such terrain with ease and elegance. He believes that legs have the potential to extend the mobility of robots, enabling them to become useful in real-world situations, such as search and rescue. Poulakakis is the principal investigator of a three-year, $265,532 grant from the National Science Foundation (NSF) to develop a family of systematic control strategies that work together with the robot's natural dynamics to generate fast, reliable and efficient running motions.
Running robots | Robotics
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Tehran Stock Exchange Competition Entry by LAVA date added: 26.03.2013 The ‘Invisible Bicycle’ is Made From Transparent Plastic Panels date added: 25.03.2013 Modularean Eco Prefab Dollhouse date added: 24.03.2013