Technology

Bandi Mbubi on Conflict Minerals

I’ve previously blogged, written about and, at this year’s Digital Odyssey, spoke on conflict minerals and the need for librarians to be aware of and respond to the issue. In the video above Bandi Mbubi speaks at TEDxExeter on his own experience of the effects of the war in Congo caused by tantalum mining.

Bandi Mbubi grew up in the Democratic Republic of the Congo, formerly Zaire, experiencing first hand the political unrest and oppression which have since worsened there. As a student activist, Bandi suffered persecution and fled the country, seeking political asylum in the U.K. But Mbubi has kept his home country on his radar, noting how the mining of tantalum — a mineral used in cell phones and computers — has fueled the ongoing war there in which 5 million have died.

Congo Calling

Raise Hope for Congo

Harvard cracks the ultimate archive, DNA

A bioengineer and geneticist at Harvard’s Wyss Institute have successfully stored 5.5 petabits of data — around 700 terabytes — in a single gram of DNA, smashing the previous DNA data density record by a thousand times.

The work, carried out by George Church and Sri Kosuri, basically treats DNA as just another digital storage device. Instead of binary data being encoded as magnetic regions on a hard drive platter, strands of DNA that store 96 bits are synthesized, with each of the bases (TGAC) representing a binary value (T and G = 1, A and C = 0).

To read the data stored in DNA, you simply sequence it — just as if you were sequencing the human genome — and convert each of the TGAC bases back into binary. To aid with sequencing, each strand of DNA has a 19-bit address block at the start (the red bits in the image below) — so a whole vat of DNA can be sequenced out of order, and then sorted into usable data using the addresses.

Harvard cracks DNA storage, crams 700 terabytes of data into a single gram

Arduino Leonardo has arrived

The Leonardo differs from all preceding boards in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Leonardo to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port.

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