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Metal on semiconductors may lead to invisibility cloaks

Researchers have developed a new technique that peppers metallic nanoparticles into semiconductors, an advance that could boost the efficiency of LED lighting by 50 percent and even pave the way for invisibility cloaking devices.

It’s the first technique that can inexpensively grow metal nanoparticles both on and below the surface of semiconductors.

The process adds virtually no cost during manufacturing and its improved efficiency could allow manufacturers to use fewer semiconductors in finished products, making them less expensive.

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In our newsletter for 2017-06-29: Fitness, Star Trek, Ethereum, drug policy, Liberty Con, Africa, trees, and fusion energy.

Hunter-gatherer past taught our brains to love exercise

by Alexis Blue

The link between exercise and the brain may be a product of our evolutionary history and past as hunter-gatherers, researchers say.

Anthropologist David Raichlen and psychologist Gene Alexander, who together run a research program on exercise and the brain, propose an “adaptive capacity model” for understanding, from an evolutionary neuroscience perspective, how physical activity impacts brain structure and function.

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