The Final 3 Card Trick 30 tours de magie scientifique pour épater les enfants à Noël ! 30 tours de magie scientifique pour épater les enfants à Noël ! Trois vidéos pour vous apprendre 30 tours de magie scientifique pour épater les enfants à Noël ! (et pas seulement, perso je suis fan de ce genre de truc ;) ) Les tours sont faciles à réaliser et demande très peu de matériel, ils sont donc parfait pour les long repas de Nöel en famille ! The EASIEST Card Trick Ever - You Can't Screw Up! Quantum computing moves forward New technologies that exploit quantum behavior for computing and other applications are closer than ever to being realized due to recent advances, according to a review article published this week in the journal Science . These advances could enable the creation of immensely powerful computers as well as other applications, such as highly sensitive detectors capable of probing biological systems. "We are really excited about the possibilities of new semiconductor materials and new experimental systems that have become available in the last decade," said Jason Petta, one of the authors of the report and an associate professor of physics at Princeton University. Petta co-authored the article with David Awschalom of the University of Chicago, Lee Basset of the University of California-Santa Barbara, Andrew Dzurak of the University of New South Wales and Evelyn Hu of Harvard University. Two significant breakthroughs are enabling this forward progress, Petta said in an interview.
DIY Thermosyphon Solar System Search The Renewable Energy site for Do-It-Yourselfers System schematic -- Thermosyphon Solar Water Heater As shown in the schematic, when sun is on the Solar Panel, the water in the panel is heated, becomes less dense and rises up into the Storage Tank. The heated water leaving the panel is replaced by cool water flowing from the bottom of the Storage Tank into the lower connection on the collector. Sun and gravity take care of the circulating the water, so no pump is needed. The system as shown here does not have freeze protection, so it must be used in non-freezing climates, or be drained for the winter. Building the Collector I used a roll of aluminum 10 " wide, which I cut to length and fit under the tubes. There is a 3/4 insulation sheet behind the plywood and another thinner plywood on the back to protect the insulation sheet. There are two sheets of sun tuf corrugated polycarbonate on top. Collector Installation Some more pictures of the finished collector. Storage Tank and Plumbing
Build Your Own Solar Battery Charger First we need an old window, I got mine from a construction site. Its your basic old nasty basement window. Make sure you wash both sides of the glass well with soap and water and window cleaner, more dust means less light gets through to your solar cells. Next take your multi-meter and sit in a sunny spot (or under a flood lamp) and check all your cells to make sure they get about .5 volts per cell. For this project I used 12 cells but you really only need 6. As you can see they all fit with a lot of room left over, if I wanted to I could have used this window for a larger project but I only need a battery charger for right now. Next we get down to the fun part, soldering. Solar cells are always .5 volts, no matter how large or small they are, they always pump out half a volt. There are two ways to wire power supplies (like batteries or solar cells) together. To wire in series you wire the positive wire from one power source into the negative wire or the other.
How I built an electricity producing Solar Panel Several years ago I bought some remote property in Arizona. I am an astronomer and wanted a place to practice my hobby far away from the sky-wrecking light pollution found near cities of any real size. In my attempt to escape city slicker yuppies (you know the kind, the ones that like to blab loudly on their cell phone while they work on some business administration degree in a cyber cafe somewhere in Trendyland.) and their light pollution, I found a great piece of remote property. The problem is, it's so remote that there is no electric service available. That's not really a problem. I built a wind turbine to provide some power on the remote property. Here is a video of the solar panel set up and in use on my remote, off-grid property. Let me state up front that I probably won't be able to help you out much if you decide to build your own solar panel(s). So what is a solar panel anyway? After a while, I came to some conclusions: seller. A solar panel is really just a shallow box. Oops!
How to build a Solar Panel New qubit control bodes well for future of quantum computing (Phys.org)—Yale University scientists have found a way to observe quantum information while preserving its integrity, an achievement that offers researchers greater control in the volatile realm of quantum mechanics and greatly improves the prospects of quantum computing. Quantum computers would be exponentially faster than the most powerful computers of today. "Our experiment is a dress rehearsal for a type of process essential for quantum computing," said Michel Devoret, the Frederick William Beinecke Professor of Applied Physics & Physics at Yale and principal investigator of research published Jan. 11 in the journal Science. In quantum systems, microscopic units called qubits represent information. The Yale physicists successfully devised a new, non-destructive measurement system for observing, tracking and documenting all changes in a qubit's state, thus preserving the qubit's informational value. "As long as you know what error process has occurred, you can correct," Devoret said.
Carver Mead's Spectator Interview From American Spectator, Sep/Oct2001, Vol. 34 Issue 7, p68 Carver Mead The Spectator Interview Once upon a time, Nobel Laureate leader of the last great generation of physicists, threw down the gauntlet to anyone rash enough to doubt the fundamental weirdness, the quark-boson-muon-strewn amusement park landscape of late 20th-century quantum physics. Carver Mead never has. As Gordon and Betty Moore Professor of Engineering and Applied Science at Caltech, Mead was Feynman's student, colleague and collaborator, as well as Silicon Valley's physicist in residence and leading intellectual. Perhaps more than any other man, Mead has spent his professional life working on intimate terms with matter at the atomic and subatomic levels. While pursuing these researches, Mead responded to a query from Intel-founder Gordon Moore about the possible size of microelectronic devices. Among whom was Albert Einstein.