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Totally RAD: Bioengineers create rewritable digital data storage in DNA

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TechAndComputer (May 21, 2012) — Scientists have devised a method for repeatedly encoding, storing and erasing digital data within the DNA of living cells.

Sometimes, remembering and forgetting are hard to do.

"It took us three years and 750 tries to make it work, but we finally did it," said Jerome Bonnet, PhD, of his latest research, a method for repeatedly encoding, storing and erasing digital data within the DNA of living cells.

Bonnet, a postdoctoral scholar at Stanford University, worked with graduate student Pakpoom Subsoontorn and assistant professor Drew Endy, PhD, to reapply natural enzymes adapted from bacteria to flip specific sequences of DNA back and forth at will. All three scientists work in the...

Performance boost for microchips

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TechAndComputer (May 18, 2012) — The semiconductor industry is faced with the challenge of supplying ever faster and more powerful chips. The Next-Generation Lithography with EUV radiation will help meeting that challenge. Fraunhofer researchers have developed key components.

Flat computers, powerful cell phones and tablets -- the integrated circuits, our computers' power centers, are becoming increasingly smaller and more complex. The microchips in today's computers already...

New silicon memory chip may offer super-fast memory

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TechAndComputer (May 18, 2012) — The first purely silicon oxide-based 'Resistive RAM' memory chip that can operate in ambient conditions -- opening up the possibility of new super-fast memory -- has been developed by researchers at UCL.

Resistive RAM (or 'ReRAM') memory chips are based on materials, most often oxides of metals, whose electrical resistance changes when a voltage is applied -- and they "remember" this change even when the power is turned off.

ReRAM chips...

How Twitter broke its biggest story, 'WeGotBinLaden'

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TechAndComputer (Apr. 26, 2012) — Nearly a year after U.S. Special Forces killed Osama bin Laden, the events of May 1, 2011 remain one of the busiest traffic periods in Twitter history. More than 5,000 tweets were sent per second when Twitter became the first source with news of bin Laden's death. But how did the news break and quickly spread across the Twittersphere?

A team of Georgia Tech researchers, together with colleagues at Microsoft Research Asia and University of...

Mathematics: First-ever image of a flat torus in 3-D

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TechAndComputer (Apr. 25, 2012) — Just as a terrestrial globe cannot be flattened without distorting the distances, it seemed impossible to visualize abstract mathematical objects called flat tori in ordinary three-dimensional space. However, a team of mathematicians and computer scientists[1] has succeeded in constructing and visually representing an image of a flat torus in three-dimensional space. This is a smooth fractal, halfway between fractals and ordinary surfaces.