science tech engineering materials 3_d_printing additive_manufacturing polymers acoustics space batteries

3-D Printer Uses Light To Make Superstiff Materials

by Michael Keller

Engineers report they have made ultralight, ultrastiff materials using a light-based 3-D printing method. 

With a technique called projection microstereolithography, MIT and Lawrence Livermore National Laboratory researchers shine a pattern of light onto a pool of liquid resin to form precise lattice structures. This light hardens the liquid where it touches, building layer after layer until the object is completed. So far, the team has used the method to form tiny lattices made of polymer, metal and ceramic.

By determining the exact geometry of the diagonal, horizontal and vertical beams that make up the tiny latticework, the team can design tiny lightweight structures made mostly of air that are incredibly stiff. 

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The Boy and the Bionic Hand: A Chance Hospital Encounter Sent an Engineer on an Improbable Mission

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by Tomas Kellner, GE Reports

gereports:

One sunny Thursday afternoon last October, Lyman Connor climbed on his bicycle and pedaled from his Roanoke, Va., home for a ride along the scenic Blue Ridge Parkway. He didn’t make it back that day.

Riding down one of the parkway’s steep hills at nearly 40 mph, a car suddenly braked in front of Connor. “The last thing I remember was going over the handlebars,” he says. “When I woke up in an intensive care unit, I had tubes coming out my body to sustain my breathing.”

Connor suffered nine skull fractures in the fall and broke his hip, jaw, clavicle and a number of ribs, one of which punctured a lung. He also lost sight in one of his eyes and his sense of taste.

After spending a week convalescing in the hospital, the 54-year-old Connor decided to go home. He was still badly hurting and in a cast when he stepped into the hospital elevator. Inside was a boy whose eyes were red from crying. “I tried to make him smile, pointed to myself, and told him it couldn’t be so bad,” Connor says.

But the boy lifted his arm and showed Connor a stump where his hand should have been.

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science tech engineering robots robocup sports soccer football world_cup competition

Olá Robocup 2014!

Now that the warm-up meatbag football matches have ended in Brazil, it’s time to move on to the main event: Robocup 2014. The international robotics competition runs on July 21-24 in João Pessoa and, though a winner will of course be crowned, the event’s long-term goal is “developing by 2050 a humanoid robot soccer team capable of winning against the human team champion of the FIFA World Cup.”

Go to Robocup 2014 to learn more about the matches that feature fully autonomous multi-robot teams battling it out on the field. Check out the live stream of the competition and see another video below.

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Birds, Bats Are Models For Next Generation Drones 

Engineers working to build smaller flying machines are looking to those that know how to do it best—bats, birds and bees. Unlike human constructions, these animals use flexible flight surfaces to maneuver more precisely through air. 

In this 2012 video, the Air Force Office of Scientific Research presents some of the projects it is funding at universities like Harvard and Brown to make next-generation flying surveillance and warfighting tools.

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