Posts - Research Blogging. Hands On Science - Journal. THALER'S QUESTION - An EDGE Special Event. LEE SMOLIN Founding and Senior Faculty member at Perimeter Institute for Theoretical Physics in Waterloo, Canada; Adjunct Professor of Physics at the University of Waterloo; Author, The Trouble With Physics Perhaps the most embarrassing example from 20th Century physics of a false but widely held belief was the claim that von Neumann had proved in his 1930 text book on the mathematical foundations of quantum mechanics that hidden variables theories are impossible.
These would be theories that give a complete description of individual systems rather than the statistical view of ensembles described by quantum mechanics. In fact de Broglie had written down a hidden variables theory in 1926 but abandoned work on it because of von Neumann's theorem. For the next two decades no one worked on hidden variables theories.
In the early 1950's David Bohm reinvented de Broglie's theory. iFixit: The free repair manual. A photo tour of the Large Hadron Collider. Back in July, we were fortunate enough to have the opportunity to tour CERN, home of the Large Hadron Collider.
In addition to getting some great information on how the machine gets protons up to speeds nearly that of light, and finding out the sorts of physics that scientists hope to find in its collisions, we also got a great view of some of the control rooms and hardware that help keep everything humming along. Unfortunately, with the LHC active, it wasn't possible to actually go down and see the massive detectors that capture the output of the proton collisions, but there's still a lot to see around CERN.
To handle the interest generated by the LHC, CERN has built a new visitor's center to introduce the public to the work that goes on there. For this visit, however, the tour started across the street, next to the CERN gift shop (yes, it has a gift shop). Retraction Watch. ScienceBlogs. ScienceBlogs.com.br. Gene Repórter. ESTE OU AQUELE? Pharyngula.
ArXiv.org e-Print archive. Physics Help and Math Help - Physics Forums. Free Online Course Materials. Distance Learning Courses and Adult Education - The Open Univers. HyperPhysics. Articles on "Electricity" Electronics Demonstrations. Electricity and Magnetism. Slashdot Stories (10)
Hacker News. Viruslist.com - Information About Viruses, Hackers and Spam. The Socratic Method. Study Hacks. Lifehacker, tips and downloads for getting things done. Nudibranchs—Photo Gallery—National Geographic Magazine. Skip to this page's content National Geographic Society P.O.
Box 98199 Washington, DC 20090-8199 USA Sign In Join. Dictamnus. Wolfram MathWorld: The Web's Most Extensive Mathematics Resource. A Difference Engine Built With LEGO® Pieces. Collatz conjecture. UVa Online Judge - Home. Thinking Machine 4. Thinking Machine 4 explores the invisible, elusive nature of thought.
Play chess against a transparent intelligence, its evolving thought process visible on the board before you. The artwork is an artificial intelligence program, ready to play chess with the viewer. If the viewer confronts the program, the computer's thought process is sketched on screen as it plays. Weasel program. Hamlet: Do you see yonder cloud that's almost in shape of a camel? Polonius: By the mass, and 'tis like a camel, indeed.Hamlet: Methinks it is like a weasel.quote from Hamlet - the origin of the term The thought experiment was formulated by Richard Dawkins, and the first simulation written by him; various other implementations of the program have been written by others. Overview Mathway: Math Problem Solver. The museum of science, art and human perception. THE PNEUMATICS OF HERO OF ALEXANDRIA.
Personal and Historical Perspectives of Hans Bethe. The Scale of the Universe. BrainPOP - Animated Educational Site for Kids - Science, Social. The PHYLO project. Bad Astronomy. Well now, this is an interesting discovery: astronomers have found what looks like a "super-Earth" – a planet more massive than Earth but still smaller than a gas giant – orbiting a nearby star at the right distance to have liquid water on it!
Given that, it might – might – be Earthlike. This is pretty cool news. Bad Science. Ben Goldacre. What Does a Solar Flare Sound Like? The Loom. Your hands are, roughly speaking, 360 million years old.
Before then, they were fins, which your fishy ancestors used to swim through oceans and rivers. Once those fins sprouted digits, they could propel your salamander-like ancestors across dry land. Fast forward 300 million years, and your hands had become fine-tuned for manipulations: your lemur-like ancestors used them to grab leaves and open up fruits. Smithsonian Human Origins Program - Smithsonian National Museum. This Week in Science - The Weekly Science Talk Radio Show and Po. TWiT Live - Netcasts you love, from people you trust. Still Face Experiment: Dr. Edward Tronick. TED: Ideas worth spreading. Gapminder.org - For a fact based world view.
The Periodic Table of Videos - University of Nottingham. Tabela Periódica. 112 elementos em fotos e imagens. Spectrum: A Robot That Balances on a Ball. Dr.
Masaaki Kumagai, director of the Robot Development Engineering Laboratory at Tohoku Gakuin University, in Tagajo City, Japan, has built wheeled robots, crawling robots, quadruped robots, biped robots, and biped robots on roller skates. Then one day a student suggested they build a robot that would balance on a ball. Dr. Kumagai thought it was a wonderful idea. The robot they built rides on a rubber-coated bowling ball, which is driven by three omnidirectional wheels. Www.whonamedit.com.