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miniature cameras connected

Some advances published in the journal directly demonstrate how these challenges can be overcome.

Others simply show, in very fine detail, exactly how flying animals achieve what they do. And such insights - for example, looking at how tiny insects stabilise themselves in turbulent air - will help inform future drone design.

To mimic what Prof Lentink described as insects' "amazing capability of flight in clutter ", one team of researchers, from the University of Maryland, engineered sensors for their experimental drone based on insects' eyes.


With sensors based on insect eyes, a drone is able to navigate through a narrow space
These "eyes" are actually miniature cameras connected to an on-board computer that is programmed to steer the drone away from surrounding objects.

Another team of researchers from the University of Pennsylvania has engineered a raptor-like appendage for a drone, enabling it to grasp objects at high speeds by swooping in like a bird of prey.

Among the work focusing on unravelling the mysteries of insect, bird and bat flight, was an experiment by researchers at the University of North Carolina - tethering a moth inside a lab-based tornado chamber.

Footage of the flying insect revealed how it twisted its wings to compensate for the unstable, swirling air.

Another team led by Prof Kenny Breuer at Brown University built an eerily accurate robotic copy of a bat wing, demonstrating the wing's remarkable range of movement and flexibility. This is largely thanks to the thin wing membrane that is unique to bats
.


Prof Kenny Breuer from Brown University explains what this eerily realistic robotic wing has revealed about flying mammals' remarkable wings
Membrane-based bat wings are of particular interest to drone engineers, because they are so tolerant of impact.

"They deform instead of breaking," explained Prof Lentink. "They are also adapting better to the airflow because they're so flexible preamp."

'Benefiting humanity'
Dr Mirko Kovac is director of the aerial robotics laboratory at Imperial College, London. His team is currently working on robots that can "perch" on trees and other objects, enabling drones to become "mobile networks of sensors".

"I'm very excited about the future of this field," he told the BBC.

"There are a lot of tasks that we can do with flying robots, such as sensing pollution, observing and protecting wildlife, or we could use them for search and rescue operations after tsunamis
牙齒矯正."



by ulikoo | 2014-05-26 15:07 | business

overwhelming media coverage love

Their lawyers say because of overwhelming media coverage of the case their clients won't receive fair trials in Massachusetts. But prosecutors are opposed to any change Speed Dating
Dating Service.

Tsarnaev, 20, has pleaded not guilty to 30 federal charges in the April 15, 2013, bombing that killed three people and injured more than 260. He and his older brother Tamerlan Tsarnaev, 26, allegedly placed two pressure cooker bombs near the Marathon finish line. Three days later Tamerlan was killed in a gun battle with police, the same night Massachusetts Institute of Technology security officer Sean Collier was also shot and killed.

Dzhokhar Tsarnaev is facing state charges in Collier's death.

by ulikoo | 2014-05-13 17:40 | love