Tuesday, 9 June 2015
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MIT's biomimetic robotics lab, which last year developed a free-running untethered cheetah robot capable of bounding along at 10mph, has now created a new version—Cheetah 2—that can autonomously jump over hurdles.
These aren't just token hurdles, either: the current version of the robot can clear obstacles that are up to 45 centimetres (18 inches) tall, while maintaining a steady speed of 5mph (8kph). 45 centimetres is about half the height of the robot.
While untethered jumping is already quite an achievement for a biomimetic robot, the way in which Cheetah 2 does it is even more impressive. There isn't a human pushing a "jump" button; Cheetah 2 is autonomous. Using on-board LIDAR, the robot can detect obstacles, estimate the distance to the object and how tall it is, and then adjust its stride so that it's perfectly placed to jump over.
» see original post http://feeds.arstechnica.com/~r/arstechnica/science/~3/KOccKJECJbw/
There were graffiti inspired prints, photos of the city's architecture, some tribal prints to align itself with the boho vibe. For women, there were cozy sweaters with fringe or crochet tunics (a warm version of Coachella appropriate attire). The "Seriously Stretchy Jean" was promoted for everyone's favorite denim legging option.
Aeropostale is continuing with their collaboration with YouTube star Bethany Moda for feminine, fun fashion. Athleisure for them is as important as ever, with a bigger offering than last season. They had great printed leggings and sophisticated prints for workout tops. There were quilted metallic vests to bring high fashion to the gym.
School's out, summer is in. At least you know you have great clothes to matriculate back to in September.
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With a keen sense of humor and superb control of a spray can, Swiss artist Remo Lienhard (aka Wes21) covers both walls and canvases with his playful sythesis of science fiction and the natural world. The artist imagines a hybrid spaceship ladybug as it blasts into the sky and pair of airborne lighthouses are revealed to be the bodies of ominous looking squid. Lienhard works in a variety of mediums from smaller acrylic and spray pieces on canvas to larger murals that often make use of surrounding objects.
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The “hole” in the ozone layer is sometimes invoked by those who downplay environmental concerns as an example of “sky is falling” warnings that never came to pass. It's an odd example. There's a simple reason ozone problems didn't come to pass: the world came together and agreed to phase out key ozone-depleting chemicals.
It’s a major success story, and one that should be remembered. As we consider the cost of dealing with ongoing environmental problems, it's worth considering: how much better off are we for the action we did take to preserve the ozone layer? Some scientists have now tackled this question.
Ozone gas in the stratosphere is enormously important for life on Earth. Ozone absorbs ultraviolet radiation emitted by the Sun, greatly reducing the amount that reaches the surface. It’s sunscreen for the planet, as UV causes skin cancer and sunburns. In the 1970s and early 1980s, it was discovered that compounds called chlorofluorocarbons (CFCs), commonly used as refrigerants and in aerosol sprays, were breaking down stratospheric ozone.
» see original post http://feeds.arstechnica.com/~r/arstechnica/science/~3/LnDKfQ0fp38/
Even though recently solar energy has been steadily becoming cheaper and more easily extractable, the dramatic drop in
The post Black Silicon Solar Cells Reach Record-Breaking 22.1% Efficiency has been published on Technology Org.
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