Previous work on using organisms as circuitry has usually involved shoehorning parts of the digital world into a very analog environment. MIT has just found an approach that uses the subtlety of the natural world to its advantage: the circuits themselves are analog. By combining genes that produce similar molecules in response to different inputs, the school's scientists have created bacterial cells that perform basic math -- the exact quantity or ratio of a given molecule is the answer. The approach offers a much wider range of results than a binary circuit (10,000 versus 2), and it exploits the cell enzymes' inherent ratio awareness to do some of the hard work. MIT wants more variety in genetic ingredients before it can produce a truly universal system, but its work could lead to organic sensors that are much simpler and more precise than their digital peers.

Filed under: Science

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Via: ExtremeTech

Source: MIT

When Apple's Tim Cook revealed that his company would once more assemble a Mac line in the US, there was a flood of questions almost immediately: which model? Where would it be made? While the CEO isn't revealing all his cards quite yet, he just gave us a better sense of those domestic production plans through a Politico interview. The American Mac will be a new iteration of an existing family, Cook says. It also won't just be a collection of parts shipped from overseas, as multiple pieces will come from Arizona, Florida, Illinois, Kentucky and Texas. We're glad to hear that Apple's partial shift to US manufacturing is sincere, although the timing of the news isn't coincidental: Cook is about to defend Apple's growing offshore cash supply in front of a Senate committee, and any visible support for the US economy is likely to burnish his firm's image.

Filed under: Desktops, Laptops, Apple

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Via: The Verge

Source: Politico

On May 6th, 1949 EDSAC (or Electronic Delay Storage Automatic Calculator) ran its first programs, calculating a table of squares and generating a list of prime numbers. The massive vacuum-tube-powered machine was put into service at the University of Cambridge and almost immediately changed how research was done at the school. It was among the first general-purpose computers capable of storing programs in rewritable memory, which took the form of mercury delay lines. Maurice Wilkes, the designer of the EDSAC, certainly earned his place in computing history, but David Wheeler's later contributions were equally important. Using the EDSAC he invented subroutines, an essential component of modern programming that allows developers to reuse bits of existing code to simplify the act of writing software. This milestone piece of machinery is little more than scraps at this point, but a team at the UK's National Museum of Computing is working to build a working replica. The hope is to have the computer up and running by May of 2015. For some more insight into how the EDSAC changed the face of computing, check out the video after the break.

[Image credit: University of Cambridge]

Filed under: Misc, Alt

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Source: Google