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HowStuffWorks "Electronics"

HowStuffWorks "Electronics"
Related:  Engineering

Cours Extreme Engineering GRAMME-HEMES Le cours complet 2013-2014 en pdf peut être téléchargé ici (67 Pages, 7 MBytes) Date de rentrée des travaux : 31 DECEMBRE 2013 à minuit Le plan d'un travail typique est disponible ici( 1 page, 24 Kb) La présentation des sujets 2013-2014 en PowerPoint est disponible ici (4,6 Mbytes) La liste des travaux choisis est ici (format .xls). Modalités d'évaluation Évaluation des travaux d'examen A la fin du cours, il est demandé à chaque étudiant de choisir un thème technologique dans la liste qui leur sera remis lors du dernier cours et de développer dans un document court (quelques pages, typiquement 2 ou 3) les 4 aspects suivants : Identifier les challenges techniques, économiques, juridiques ou autres de la technologie et leur degré d’importance. Comme pour tout travail scientifique, il est indispensable de citer les sources utilisées. Délais et méthode d’envoi du travail Le travail est à choisir pour le dernier cours de l'année. Cotation du travail Cette page est copyright B.

BigDog, el robot de DARPA que lanza objetos BigDog, el robot que Boston Dynamics está desarrollando desde 2008 para DARPA, acaba de dar un importante salto en sus prestaciones puesto que, gracias a un brazo mecánico, es capaz de agarrar un objeto para luego lanzarlo por los aires. Hasta la mitad del siglo XX, era bastante habitual que los ejércitos de todo el mundo recurriesen a mulas y caballos para realizar el transporte de tropas y de suministros, sobre todo, cuando había que realizar desplazamientos en zonas escarpadas y de difícil acceso para un camión o cualquier otro tipo de vehículo a motor. BigDog es un proyecto en el que DARPA (la agencia de investigación del Departamento de Defensa de Estados Unidos) y Boston Dynamics llevan trabajando desde el año 2005 con el objetivo de desarrollar un robot que se soporta sobre cuatro patas emulando las mulas que usaban los ejércitos de antaño. Otro experimento de Boston Dynamics y DARPA que nos hace volver a pensar en la singularidad tecnológica.

The Venus Project New Principle of Wind Generated Electricity Discovered The technology was developed by Johan Smit and Dhiradi Djairam, scientists at Delft University of Technology. A scale model of the Ewicon has been built by Mecanoo Architects and is located in front of the faculty of Electrical Engineering, Mathematics and Computer Science at the same university. At the moment, the researchers have created just a few small-scale working prototypes of the Ewicon, as the team needs more resources to build a larger model. Ewicon, which is shortage of “Electrostatic WInd Energy CONverter”, is able to generate electricity from wind energy, but not by transforming mechanical power into electrical energy. Positively charged particles normally follow the anode, but when the wind pushes the particle away from the negative electrode, it increases its potential electrical energy that can then be collected. The wind turbine consists of a battery, inverter, HVDC (High-Voltage, Direct Current) source, pump and charging system. via: [wired.co.uk]

Tesla Model S Achieves Best Safety Rating of Any Car Ever Tested | Press Releases Palo Alto, CA — Independent testing by the National Highway Traffic Safety Administration (NHTSA) has awarded the Tesla Model S a 5-star safety rating, not just overall, but in every subcategory without exception. Approximately one percent of all cars tested by the federal government achieve 5 stars across the board. NHTSA does not publish a star rating above 5, however safety levels better than 5 stars are captured in the overall Vehicle Safety Score (VSS) provided to manufacturers, where the Model S achieved a new combined record of 5.4 stars. Of all vehicles tested, including every major make and model approved for sale in the United States, the Model S set a new record for the lowest likelihood of injury to occupants. While the Model S is a sedan, it also exceeded the safety score of all SUVs and minivans. The Model S has the advantage in the front of not having a large gasoline engine block, thus creating a much longer crumple zone to absorb a high speed impact.

MC2 can transform into 8 different bikes There are plenty of bikes out on the market but most companies stick to the traditional design as anything off the ordinary is at risk of not being a success. The MC2 from IDSG Engineering and Trading however is a transforming bike which can be arranged into one of eight different configurations. [Image Courtesy of MC2Bike] The MC2 has been moslty shown in what is called the Cruiser mode which takes on the appearance of a tricycle/penny farthing type bike. The bike has taken many hours of engineering and manufacturing in order to get rid of the chain. The designers chose disc brakes and not just one, but two rotors on the front of the bike and also threw in a suspension seat-post system for good measure too. The MC2 isn’t just a new design concept when it comes to the frame, it showcases numerous component ideas from the engineers. The bike offers a stem that can be adjusted by height with a quick release mechanism. [Via MC2Bike] Google+

Planet Libre - Éolienne urbaine sous licence libre, par Aeroseed Speaking of nice car, this one deserves to be famous Ces agriculteurs et ingénieurs qui veulent libérer les machines Et si on créait une civilisation en « open source » ? Un monde sans brevets. Des objets, des appareils, des machines, reproductibles à l’infini par tous ceux qui le souhaitent, grâce à la diffusion « libre » de leurs plans. C’est ce que propose Marcin Jakubowski : ce jeune diplômé de physique nucléaire, habitant du Missouri (États-Unis), devenu agriculteur-bricoleur, cherche à constituer et diffuser un kit de 50 machines industrielles – tracteur, bulldozer, moissonneuse-batteuse, four, éolienne, moteur hydraulique, bétonnière ou machine à compacter des briques de terre – pour bâtir, en toute autonomie, l’infrastructure d’un village. Ou les bases d’une civilisation ! Le principe est simple : il s’agit de fabriquer artisanalement des machines industrielles, à très bas coût (en moyenne 8 fois moins que celles fabriquées industriellement), et d’expliquer à ceux qui le souhaitent comment les reproduire eux-mêmes. Recensement et adaptation des outils, réalisation et diffusion des plans

Amazing ERO Concrete-Recycling Robot Can Erase Entire Buildings Demolition is a messy business—not only does the process require heavy machinery and produce clouds of dust, but it also results in giant piles of rubble that often head straight for the landfill. Omer Haciomeroglu, a student at Sweden’s Umeå Institute of Design has designed Ero – a robot that recycles concrete in an energy-efficient manner and separates it from rebar and other debris on the spot. The project won the 2013 International Design Excellence Award (IDEA) in the Student Designs category. Heavy machines used in demolition consume large amounts of energy in order to crush concrete walls into small pieces, not to mention that demolition processes have to be accompanied by large amounts of water sprayed onto the structures to prevent the spread of dust. ERO Concrete Recycling Robot can efficiently disassemble concrete structures without any waste, dust or additional separation. + Omer Haciomeroglu Via Core77

Clothes Dryer of the Future Uses Vibrations, Not Heat Scientists at Tennessee’s Oak Ridge National Laboratory have developed a “dryer of the future” that uses high-frequency vibrations instead of heat to extract moisture from clothes. Compared with traditional tumble dryers, which can consume as much energy as a refrigerator, clothes washer, and dishwasher combined, according to the Natural Resources Defense Council, the newfangled process significantly reduces drying time and energy use. Ayyoub M. Momen, the research engineer spearheading the project, said his invention was inspired by commercial humidifiers that use ultrasonic transducers to convert water into tiny droplets, creating a cool mist. “When I put a very small piece of fabric on top of these transducers, in just 14 seconds I could dry fabric from completely wet to completely dry,” Momen, who described the results as “amazing and mind-blowing,” told U.S.A. RELATED | Palm-Sized Washing Machine Cleans With Ultrasound Another plus? + Oak Ridge National Laboratory [Via U.S.A.

New efficient, affordable solar tech could trump fossil fuel Striking another blow to the oil and gas industries, an American solar company has developed technology that can produce super-efficient solar power that’s cheaper than fossil fuels. Rayton Solar’s new solar panel manufacturing technology uses 50 to 100 times less silicon than other technologies, cutting out large amounts of the most costly component of solar panels. The company says its patent-pending process uses just four microns worth of silicon, leaving no waste – while boosting the efficiency of their panels to 24 percent. Rayton claims their patent-pending solar PV modules can be manufactured in the United States at a cost of 60 percent less than the industry average, which is based on prices from places like China where the majority of solar panels are made. Related: Cheap Solar PV Powers Substantial Global Renewable Energy Growth in 2013 + Rayton Solar Images via Rayton Solar

Passerelle Boverie Cette passerelle vise à créer une liaison cyclo-pédestre entre le quartier des Guillemins et le parc de la Boverie. Cet ouvrage s'inscrit dans le cadre de la dynamisation urbaine et de l'attractivité du territoire du quartier de la gare TGV de Liège. La Passerelle Boverie favorisera la circulation des piétons et des cyclistes entre le quartier des Guillemins, la Boverie et la Médiacité. Et même au-delà puisqu'elle permettra aux habitants des Vennes, de Grivegnée, de Chênée... de rejoindre aisément la gare et le centre-ville. C’est le bureau d’étude liégeois Greisch qui en a conçu l'architecture et la structure. Cette passerelle en acier a été préfabriquée par petits tronçons de 10 mètres de long aux Ateliers Poncin à Ocquier (Clavier). La Passerelle Boverie fait partie du projet global de rénovation urbanistique du quartier des Guillemins, qui s'articule sur : Cette nouvelle structure est un des grands projets du Projet de Ville 2007-2015. © Jean-Pierre Ers - Juillet-Août 2015

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