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DARPA to develop best practices for 3D printing
Just as steel's physical properties change depending on how it's produced, so too do 3D printed materials. However, unlike steel, we don't yet fully understand how different these newfound techniques affect the resulting printed item. Sometimes a printed item -- even if it's made from something common like aluminum -- ends up having a very different microstructure had it been created with traditional, subtractive methods. You can see an example of that below. Heck, even using the same material on different printer models can result items with wildly divergent properties. But DARPA is looking to change that. The DoD's advanced research agency announced Friday that it is launching an Open Manufacturing program to create comprehensive reference documentation for 3D printing and usher in an era of productive predictability.
Army scientists juice battery voltage, hike life up to 30 percent
With the modern US soldier turning into a walking gadget, the army has some heavy reasons to lower battery weights. Its own scientists might have the answer, claiming 30 percent energy density jumps could happen using additives they developed. Those "sacrificial agent" materials would bond with electrodes to allow five volts instead of the four they've been stuck on, permitting a "quantum leap" in efficiency and weight. We'll have to see if that'll come to pass, but given the sheer volume of tech that soldiers are strapping on these days, it couldn't be too soon. To see a video of how it works, zap past the break.
Tiny 'jumping robots' have more in common with firecrackers than Johnny 5
Perhaps calling an immobile plastic bug with explosives strapped to its underside a "jumping robot" is a bit of a stretch, but who are we to argue with the Army Research Laboratory and the University of Maryland. The two groups have collaborated to create a pair of "robots" that measure just a few millimeters in size but can jump several centimeters in the air. One uses a spring like mechanism (which an operator must press down with a pair of tweezers) to propel it, while the other uses a small rocket, which can be triggered either by current applied over wires or a phototransistor (for untethered flight). It all makes for a pretty neat video, which you can find after the break - even if your sister's Furby was more robot than these tiny things.
