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Saturday, November 17, 2007

Tiny robotic roaches were able to influence the collective behavior of real ones


cockroach community recently had its collective mind changed-by a group of tiny robots. Certain animals engage in what's known as self-organization. Picture a school of fish or a flock of birds. Scientists have been researching autonomous robot systems based on this concept.


Hmm, no snacks here. But that's OK--this roach is looking for company, not food. And as it turns out, cockroaches may be more inclined to follow the crowd than to follow other entomological instincts.


Research published in Friday's edition of the journal Science used matchbox-size robots to put roaches to the test. Everyone who's ever stayed in a cheap hotel knows that the brown bugs scurry for the shelter of darkness when confronted with a bright light; could other roaches persuade them to adopt a riskier behavior?

What about mixed groups of, say, bots and bugs? A paper detailing this new animal-robot cooperation was published in the November 16 issue of Science. First, cockroaches were left alone in an area with two choices of shelter. After scurrying around, the group chose the darker shelter. Then came the robots. They look nothing like cockroaches. In fact, they more closely resemble tiny trucks. But apparently they smelled enough like roaches to trick the insects. The robo-roaches were trained to prefer the lighter shelter. They behaved like roaches, and eventually convinced the group to choose the lighter shelter in more than half the trials. But the robots sometimes were convinced by the roaches, too. In 40 percent of the trials, they joined the real-live roaches, and the group chose the darker shelter. The work signals a new app-"roach" for future research in animal-machine collaboration




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