I saw this today on Wikipedia:
The United States military is funding railgun experiments. At the University of Texas’ Center for Electromechanics, military railguns capable of delivering tungsten armor piercing bullets with kinetic energies of nine million joules have been developed (http://www.iat.utexas.edu/electrodyn.html). Nine million joules is enough energy to deliver 1 kg of projectile at 3 km/s – which will tear a tank to pieces in a single shot.
Railgun – Wikipedia, the free encyclopedia
science, weapon, military, railgun, exotic
If your a fan of the BBC TV series ‘Doctor Who’ you might remember that for the most part, the sonic screwdriver was the do all wonder tool that was always there in a pinch.
I found this site that has some information on how on devoted fan built his own replica.
RacProps Issue 5 – Doctor Who: The Sonic Screw Driver
Be the first in your apartment block to have a closed, non-orientable, zero-volume, boundary-free manifold.
Acme Klein Bottles
klein bottle, glass, topology
Saw this on Boing Boing yesterday:
Did you spot the Millennium Falcon in Revenge of the Sith? What about the kitchen sink or the only noted the Wilhelm scream? Or perhaps you were too busy watching Hayden Christensen that you didn’t notice George Lucas’ rare cameo? Here’s an article that lists many of the hidden tidbits in the last Star Wars film – Revenge of the Sith.
Star Wars: Episode III Easter Egg Hunt
Star Wars, easter eggs
Can I get this in blocks? I’d love to mill something out of this material. Sounds like the wood is being rendered to break down its cellulose and then its poured into whatever basic shape is needed. Still sounds neat.
The technology features a new material called “wooden ‘plastic.’” Although composites of wood and plastic have already been developed, EXPO 2005 Aichi, Japan will introduce clock gears created with wooden “plastic,” made of 100 percent wood. To make these gears, wood waste and chips are used. These materials are heated at 200°C in a high-temperature steam boiler, to break down the wood fibers. The resulting material is dried and powdered. The powder is then re-heated and pressed into disc-shape. Characteristically, when heated these powders liquefy like paste, and when cooled, they solidify like plastic. Finally, teeth are cut into the edges of the discs, to create gears. There is little difference in strength between gears made of wooden “plastic” and those made of conventional plastic.
Clock gears made of wooden ‘plastic’
wood, recycle, plastic, Japan
Oops! I forgot one. I have a few old cell phones that this might work on. I also see gobs of them in second hand stores for less than $5 each all the time. One of these might make a good display on a robot if you can drive it.
MAKE: Blog: Use a Cell Phone LCD on your Computer
MAKE, DIY, cell phone, LCD, display