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The secret of nanoparticle packing in cement

Cement production is responsible for 5% of carbon dioxide emissions. If we are to invent a "green" cement, we need to understand in more detail the legendary qualities of traditional Portland cement.

Posted: Dec 20th, 2012

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Photons emitted by quantum dots can be made indistinguishable through quantum frequency conversion

An international collaboration has demonstrated the ability to make photons emitted by quantum dots at different frequencies identical to each other by shifting their frequencies to match. This "quantum frequency conversion" is an important step for making solid-state, single photon sources, including quantum dots, more useful light sources for photonic quantum information science.

Posted: Dec 19th, 2012

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Super-fine sound beam could one day be an invisible scalpel

A carbon-nanotube-coated lens that converts light to sound can focus high-pressure sound waves to finer points than ever before. The University of Michigan engineering researchers who developed the new therapeutic ultrasound approach say it could lead to an invisible knife for noninvasive surgery.

Posted: Dec 19th, 2012

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Preventing heat buildup within 3D integrated circuits

In the effort to pile more power atop silicon chips, engineers have developed the equivalent of mini-skyscrapers in three-dimensional integrated circuits and encountered a new challenge: how to manage the heat created within the tiny devices.

Posted: Dec 19th, 2012

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Pocket test measures 50 things in a drop of blood

A new device about the size of a business card could allow health care providers to test for insulin and other blood proteins, cholesterol, and even signs of viral or bacterial infection all at the same time - with one drop of blood.

Posted: Dec 19th, 2012

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