background preloader

Science and stuff

Facebook Twitter

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.

THALER'S QUESTION - An EDGE Special Event

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. iFixit: The free repair manual. Dear Minnesotans, Right now, Minnesota has a chance to pass the first Fair Repair bill in the nation.

iFixit: The free repair manual

We have a chance to guarantee our right to repair electronics—like smartphones, computers, and even farm equipment. 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.

A photo tour 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.

Atheism and skepticism

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" Explaining "electricity" visuallyA simple classroom activity using red and green plastic sheets.

Articles on "Electricity"

Here's a way to visualize Electric Current, "Static", and the electric charge which creates both. Electronics Demonstrations. Electricity and Magnetism. Electricity and Magnetism Timeline of Electricity and Magnetism - Our timeline guides you through the highlights of electricity and magnetism across the globe, from the first compasses in China to the invention of magnetic core computer memory at the Massachusetts Institute of Technology and beyond.

Electricity and Magnetism

Pioneers in Electricity and Magnetism - Ampere, Celsius, Kelvin, Hertz, Tesla: These terms are familiar to all science students. Behind them is a group of scientists who went down in history for their groundbreaking work in magnetism and electricity. Who were these brilliant inventors, physicists and chemists, and what lasting contributions did they make to their fields – and to our lives?

Slashdot Stories (10) Hacker News. Viruslist.com - Information About Viruses, Hackers and Spam. The Socratic Method. Study Hacks. Deep Habits: Write Your Own E-mail Protocols July 8th, 2015 · 22 comments The Curse of Process Inefficiency A couple weeks ago, I posted some ideas about why we have such a love/hate relationship with e-mail.

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.

Nudibranchs—Photo Gallery—National Geographic Magazine

Box 98199 Washington, DC 20090-8199 USA Sign In Join Search National Geographic Search NationalGeographic.com Search Video Connect: Current Issue May 2014 Table of Contents » Living Color. 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.

Thinking Machine 4

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. A map is created from the traces of literally thousands of possible futures as the program tries to decide its best move. Those traces become a key to the invisible lines of force in the game as well as a window into the spirit of a thinking machine. Play the game. Image Gallery View a range of still images taken from Thinking Machine 4. Weasel program. 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!

Bad Astronomy

Bad Science. Ben Goldacre. What Does a Solar Flare Sound Like? The Loom. Your hands are, roughly speaking, 360 million years old.

The Loom

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.