Serious Flaw Emerges In Quantum Cryptography The problem of sending messages securely has troubled humankind since the dawn of civilisation and probably before. In recent years, however, physicists have raised expectations that this problem has been solved by the invention of quantum key distribution. This exploits the strange quantum property of entanglement to guarantee the secrecy of a message. Entanglement is so fragile that any eavesdropper cannot help but break it, revealing the ruse. So cryptographers can use it to send a secure key called a one time pad that can then be used to encrypt a message. If the key is intercepted, the sender simply sends another and repeats this until one gets through.
Physics Flash Animations We have been increasingly using Flash animations for illustrating Physics content. This page provides access to those animations which may be of general interest. The animations will appear in a separate window. The animations are sorted by category, and the file size of each animation is included in the listing. Also included is the minimum version of the Flash player that is required; the player is available free from The categories are: In addition, I have prepared a small tutorial in using Flash to do Physics animations. printer Eating 10 hot dogs in 6 minutes and belching the national anthem may impress your friends, but neither of those feats will do much for your body—at least not much good. Instead, why not train yourself to do something that may actually pay off? We're not talking bench presses and interval training (though those do help). You can teach your body to cure itself from everyday health ailments—side stitches, first-date jitters, even hands that have fallen asleep. Just study this list, and the next time your friends challenge you to an ice cream eating contest, chow down: You know how to thaw a brain freeze—and 17 other tricks that'll make everyone think you're the next David Blaine.
5,000 Free Loops – Drums, Guitar , Orchestra, Heavy Metal, & More - Hip Hop Makers Here are over 3 gigabytes of free loops of drum samples, guitar loops, Dubstep loops, bass loops, Hip Hop loops, and many more free loops. Please share this post and follow us to show support. New free downloads added weekly. Get our free newsletter. 2011 ABPP Project Grant Awards Announcement American Battlefield Protection Program 2011 Grant Awards The American Battlefield Protection Program announces the awarding of 25 grants totaling $1.2 million to assist in the preservation and protection of America's significant battlefield lands. The funds will support a variety of projects at battle sites in 17 states or territories.
Laws of physics vary throughout the universe, new study suggests A team of astrophysicists based in Australia and England has uncovered evidence that the laws of physics are different in different parts of the universe. The team -- from the University of New South Wales, Swinburne University of Technology and the University of Cambridge -- has submitted a report of the discovery for publication in the journal Physical Review Letters. A preliminary version of the paper is currently under peer review. The report describes how one of the supposed fundamental constants of Nature appears not to be constant after all. Instead, this 'magic number' known as the fine-structure constant -- 'alpha' for short -- appears to vary throughout the universe. "The implications for our current understanding of science are profound.
Math, Physics, and Engineering Applets Oscillations and Waves Acoustics Signal Processing Electricity and Magnetism: Statics Electrodynamics Nature: New set of cute animals Another amazing set of cute animals the nature has to offer. 1. Baby hedgehogs 2. Data Analysis for the People Social graph: The premium version of Wolfram Alpha automatically works out how to visualize data you provide, in this case mapping connections in an e-mail archive. Shows like Numb3rs and CSI have popularized the idea of experts solving problems using data analysis. Now the “knowledge engine” Wolfram Alpha wants to help nonexperts try their hand at it. Wolfram Alpha looks like a Web search engine but can answer queries such as “how old is President Obama?” or “heart disease risk 50-year-old male.”
Swiss 'augmented reality' is out of this world 'Augmented reality' ... Jan Torpus. Photo: AFP A pair of Swiss policemen cast a suspicious eye as a creature in a space helmet with a camera mounted on top and carrying an astronaut's backpack wanders around Basel's St. Johann Park. But what appears to be a visiting extra-terrestrial turns out to be a maverick designer, Jan Torpus, who is pushing the boundary between the real world and fantasy in a project he calls "augmented reality." Quantum Computing: Will It Be a Leap in Human Evolution? Quantum computers have the potential to solve problems that would take a classical computer longer than the age of the universe. Oxford Professor David Deutsch, quantum-computing pioneer, who wrote in his controversial masterpiece, Fabric of Reality says: "quantum computers can efficiently render every physically possible quantum environment, even when vast numbers of universes are interacting. Quantum computers can also efficiently solve certain mathematical problems, such as factorization, which are classically intractable, and can implement types of cryptography which are classically impossible. Quantum computation is a qualitatively new way of harnessing nature." Quantum computing sounds like science fiction -as satellites, moon shots, and the original microprocessor once were.
String Theorists Squeeze Nine Dimensions Into Three A simulation of the early universe using string theory may explain why space has three observable spatial dimensions instead of nine. The leading mathematical explanation of physics goes beyond modern particle theory by positing tiny bits of vibrating string as the fundamental basis of matter and forces. String theory also requires that the universe have six or more spatial dimensions in addition to the ones observed in everyday life. Explaining how those extra dimensions are hidden is a central challenge for string theorists. “This new paper demonstrates, for the first time, that our 3-D space appears naturally … from the 9-D space that string theory originally has,” says Jun Nishimura of the High Energy Accelerator Research Organization in Tsukuba, Japan. He and his colleagues will publish their findings in an upcoming issue of Physical Review Letters.