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Biotech

Robotic Mold 118

Canis Lupus writes to mention that researchers from the University of West England are designing the world's first biological robot, constructed from mold. The robot, "Plasmobot," will be created using vegetative slime mold called plasmodium (Physarum polycephalum) that is commonly found in forests, gardens, and most damp places in the UK. "This new plasmodium robot, called plasmobot, will sense objects, span them in the shortest and best way possible, and transport tiny objects along pre-programmed directions. The robots will have parallel inputs and outputs, a network of sensors and the number crunching power of super computers. The plasmobot will be controlled by spatial gradients of light, electro-magnetic fields and the characteristics of the substrate on which it is placed. It will be a fully controllable and programmable amorphous intelligent robot with an embedded massively parallel computer."

Comment Re:I don't get it.. (Score 5, Interesting) 285

Heh, glad I put that disclaimer there. Stopping force is proportional to velocity, (technically shear rate), in a Newtonian fluid such as water or oil: in a shear-thickening fluid viscosity is proportional to velocity. Viscosity is the proportionality constant linking speed and stopping force, so I guess that makes stopping force proportional to the square of the speed.

For more info, try these.

Comment Re:I don't get it.. (Score 5, Interesting) 285

I guess there's a limit to the amount of shock it can absorb. I would imagine its properties have been tweaked so that it stops any impact within its own thickness. Obviously if the impacting object is travelling faster, that results in more rapid deceleration and thus more forces transferred to the delicate internally-bits of your laptop. For dropping off a table though, it probably provides the smallest possible deceleration force against the floor, compared to protection materials currently on the market.

My suspicion would be that rather than rather than causing the linear deceleration of a simple spring constant, (like most other foams, rubbers, etc.), it provides an exponential deceleration: the stopping force in a shear-thickening fluid is proportional to the speed rather than the displacement. This means that the material starts acting from the very moment of impact, as that is the point with the highest speed. A spring, (or foam, or rubber, or anything else that acts like a spring), would do essentially nothing until the impact has squeezed it enough to get a decent counter-force out of it. But by that time it might be too late, and the spring might have already bottomed out. I'd be interested to see some numbers for this gel, to back up the stuff I've just written!
 
/Disclaimer: Mechanical engineering undergraduate. Don't have my qualification yet; take above post with a pinch of salt.

Hardware Hacking

Wearable Computer With Lightweight HUD 150

zeazzz writes to mention that the folks over at UMPC have a very cool little writeup and pictorial of a user's latest wearable PC. With the surge in smart phone adoption it seems that enthusiasm for wearable computers has dropped off a bit, which is too bad. I certainly look forward to my augmented reality HUD instead of depending on my iPhone for everything. "Essentially he took the MyVu headset, removed one of the eye pieces, and mounted the other to his glasses to that he could see his surroundings and the UX's screen at the same time. The MyVu is attached to the UX through the A/V output port on the UX's port replicator dongle. With some additional addons he provided his UX with extra battery life via an external battery, and several input methods to communicate with the UX while the rest of the kit resides within the backpack."
The Military

F-22 Raptor Cancelled 829

BayaWeaver writes "Slate reports that the F-22 Raptor has been cancelled by the Senate. At an estimated price tag of $339 million per aircraft, even the powerful military-industrial-congressional complex couldn't keep this Cold War program alive in these hard times. They look very cool though and have appeared in movies like Hulk and Transformers. But not to worry too much about the future of the military-industrial-congressional complex: the F-35 Lightning II begins production next year! As a side note, in 2007 a squadron of Raptors became deaf, dumb and blind when they flew over the International Date Line."
Space

Sunspots Return 276

We're emerging from the longest, deepest sunspot drought since 1913 (we discussed its depths here) with the appearance of a robust group of sunspots over the weekend. Recently we discussed a possible explanation for the prolonged minimum. The Fox News article quotes observer Michael Buxton of Ocean Beach, Calif.: "This is the best sunspot I've seen in two years." jamie found a NASA site where you can generate a movie of the recent sunspot's movement — try selecting the first image type and bumping the resolution to 1024. The magnetic field lines are clearly visible.

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