When it comes to hunting down humans running speeds, MIT's cheetah might come second to Boston Dynamics' own high-velocity quadruped, but by substituting pneumatics with motors, MIT's version apparently runs far more efficiently. At the recent International Conference on Robotics and Automation, the Institute of Technology showed of its newest version, which reached a top speed of 13.7 mph. To accomplish this, the runner still needs parallel support bars to constrain movement in one dimension, reducing any roll, yaw -- and the chances of a pretty expensive fall. The team says the new version's cost of transport (COT is power consumption divided by weight, times velocity) is around 0.52. In comparison, Honda's Asimo has a hefty COT of 2.

This impressive efficiency is down to the use of electric motors over hydraulics, with a new "three phase permanent magnet synchronous motor" providing the necessary torque. Researchers also used biometric principles to conserve energy and reduce stress on joints, including Kevlar tendons across the back of the legs. With all those efficiency increases, it mean that MIT's cheetah can theoretically run while carrying its own power source. We've added a video after the break, where you can see the bot hit its top speed while carrying some battery dummy weights.

Filed under: Robots

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Via: Spectrum IEEE

Source: MIT Biomimetics

Previous work on using organisms as circuitry has usually involved shoehorning parts of the digital world into a very analog environment. MIT has just found an approach that uses the subtlety of the natural world to its advantage: the circuits themselves are analog. By combining genes that produce similar molecules in response to different inputs, the school's scientists have created bacterial cells that perform basic math -- the exact quantity or ratio of a given molecule is the answer. The approach offers a much wider range of results than a binary circuit (10,000 versus 2), and it exploits the cell enzymes' inherent ratio awareness to do some of the hard work. MIT wants more variety in genetic ingredients before it can produce a truly universal system, but its work could lead to organic sensors that are much simpler and more precise than their digital peers.

Filed under: Science

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Via: ExtremeTech

Source: MIT

You might say the day is never really done in consumer technology news. Your workday, however, hopefully draws to a close at some point. This is the Daily Roundup on Engadget, a quick peek back at the top headlines for the past 24 hours -- all handpicked by the editors here at the site. Click on through the break, and enjoy.

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While patrolling the halls of the CHI 2013 Human Factors in Computing conference in Paris, we spied a research project from MIT's Media Lab called "Smarter Objects" that turns Minority Report tech on its head. The researchers figured out a way to map software functionality onto tangible objects like a radio, light switch or door lock through an iPad interface and a simple processor / WiFi transceiver in the object. Researcher Valentin Huen explains that "graphical user interfaces are perfect for modifying systems," but operating them on a day-to-day basis is much easier using tangible objects.

To that end, the team developed an iPad app that uses motion tracking technology to "map" a user interface onto different parts of an object. The example we saw was a simple radio with a a pair of dials and a speaker, and when the iPad's camera was pointed at it, a circular interface along with a menu system popped up that cannily tracked the radio. From there, Huen mapped various songs onto different positions of the knob, allowing him to control his playlist by moving it -- a simple, manual interface for selecting music. He was even able to activate a second speaker by drawing a line to it, then "cutting" the line to shut it off. We're not sure when, or if, this kind of tech will ever make it into your house, but the demo we saw (see the pair of videos after the break) seemed impressively ready to go.

Filed under: Tablets, Science

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