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Memristors – is the “missing” fourth electronic component the key to AI?

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I guess I never got far enough with my failed degree in electronics to discover that there’s a fundamental component missing from the metaphorical toolbox.

But apparently there is… or there was. Now, though, the memristor is more than just a concept, and realising it may provide a key to building artificial intelligences… with a little help from slime molds:

Four interconnected things, mathematics says, can be related in six ways. Charge and current, and magnetic flux and voltage, are connected through their definitions. That’s two. Three more associations correspond to the three traditional circuit elements. A resistor is any device that, when you pass current through it, creates a voltage. For a given voltage a capacitor will store a certain amount of charge. Pass a current through an inductor, and you create a magnetic flux. That makes five. Something missing?

Indeed. Where was the device that connected charge and magnetic flux? The short answer was there wasn’t one. But there should have been.

It’s a fairly lengthy article that covers a lot of ground, so it’s hard to summarize with a quote or two. Go read the whole thing; not only is the science itself quite intriguing, it’s also an example of the better sort of journalism that New Scientist puts out.

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Vein-crawling robot insect

vein crawling robotFeeling tiny insects crawling through your veins sounds like some sort of Burroughs-esque junk withdrawal nightmare (and with good reason), but Israeli scientists are hoping that a millimetre-diameter robotic bug could be used to diagnose and treat artery blockages and cancer in human patients without the need for major invasive surgery:

The little robot – with a diameter of just one millimeter – has neither engine nor onboard controls, instead being propelled forward by a magnetic field wielded on it from outside the patient’s body.

Controlling the tiny bot externally means boffins have been able to shrink it to a previously impossibly tiny scale […]

Scientists reckon the mini bot can even withstand massive blood flow and is able to push forward regardless of the magnetic field actuation direction, doing away with any need for exact localisation and direction retrieval.

A controller can move the little crawly creature in increments, with its speed of up to nine millimeters a second regulated by varying external magnetic field frequencies. Outside control also means the robot can be made to work for an unlimited amount of time, rather than suddenly – not to mention inconveniently – keeling over to die of battery failure in the middle of a medical procedure.

Promising… but still pretty freaky. You can thank regular reader and commenter Robert Koslover for grossing you out with this one. [image borrowed from linked article]

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Scale

Here’s a bit of sensawunda for your Saturday. Spend ten minutes and think about the size of universe, starting at the home base of our own Sun and moving on out into mind-boggling infinities…

Most of this stuff will be familiar to Futurismic readers, I imagine, but the images are good, and I still get that sf-nal kick from being reminded of the incredible and momentary insignificance of our own existence. [via MetaFilter]

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Are we alone?

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saucersTranshumanist blogger George Dvorsky points to a debate between astrophysicist Brandon Carter and a team of Serbian researchers, the core of which revolves around how long complex (and intelligent) life takes to evolve:

Prior to ‘recent times’, universal mechanisms were in place to continually thwart the evolutionary development of intelligence, namely through gamma-ray bursts, super novae and other forms of nastiness. Occasional catastrophic events have been resetting the “astrobiological clock” of regions of the Galaxy causing biospheres to start over. “Earth may be rare in time, not in space,” they say. They also note that the rate of evolution is intimately connected with a planet’s environment, such as the kind of radiation its star emits.

For further discussion of our place in the universe see the Copernican Principle, which exhorts us to avoid assuming that humanity, Earth, and our place in the universe can be assumed to be unique and special.

Further the notion of punctuated equilibrium to describe evolution is interesting: might it be extended to describe other evolutionary phenomena? Eric Beinhocker‘s superb The Origin of Wealth describes both technology and the economy in terms of evolutionary systems, both of which experience a form of punctuated equilibrium.

[image from eek the cat on flickr]

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