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Stanford University students Derrick Davis and Tom McFadden made this rap video about metabolism. It’s called “Oxidate It or Love It/Electron to the Next One” and is a parody of 50 Cent’s “Hate It or Love It” and Jay-Z’s “On to the Next One.”
via Make
Stanford University’s robotics lab has built autonomous cars for several years. Recently, it established a land speed record for a robot car — 140 mph in an Audi TT-S nicknamed “Shelly”. But their next goal is even more ambitious: to have Shelly race the twisted dirt road that leads up to Pike’s Peak. Chris Dannen writes in Fast Company about the changes that allow the car to safely navigate sharper turns at higher speeds:
The new autonomous TT-S is markedly different from Junior, however. Junior was environmentally-aware; it had cameras that could see objects and road features, and it paired that data with GPS data. All that processing required two on-board Linux computers running quad-core Pentium chips and programmed in C and C++.
The new TT-S, unofficially dubbed “Shelly,” uses a different system. It has no cameras, only GPS, and a smaller, less powerful computing box running Sun’s Java Real Time System running on Solaris. Why? Despite Junior’s speedy processors, it still takes the car between 20-50 milliseconds to react to inputs from its sensory equipment. Because the TT-S “Shelly” is traveling at much higher speeds–the team has pushed it over 140 mph–even 20 milliseconds is too much of a delay.
You can view more videos of the project at the link.
How do you earthquake-proof a building? Apparently it involves allowing the building to shake in a controlled fashion. Clay Dillow explains one new use of this approach:
A research team led by Stanford and the University of Illinois successfully tested a structural system that holds a building together through a magnitude-seven earthquake, and even pulls it back upright on its foundation when the quaking stops. The key: embracing the shaking, by limiting the damage to a few flexible, replaceable areas within the building’s frame.
When a quake strikes, the new system dissipates energy through steel frames in the building’s core and exterior. These frames are free to rock up and down within fittings fixed at their bases. Steel tendons made from twisted steel cables run the length of each frame, keeping the frames from moving so much that the building could shear. When the quake stops, these tensile tendons pull the frames back down into the “shoes” at their bases, returning the building to its plumb, upright position.
So where does all that energy go? At the base of each frame is a flexible steel “fuse” that takes the brunt of the force, keeping the frame and constituent tendons from shouldering the entire load. The fuses are easily replaceable when they blow — just like an electrical fuse — so after a quake, the building can be refitted with fresh fuses for its next bout with Earth’s occasional tectonic fits.
