Monday, February 6, 2012

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Reading Brain Signals

Posted by Max On December - 6 - 2009 2 COMMENTS

epoc_headsetPlastic tendrils are clutching my temples, reading electric signals from my brain. I’m sitting in a conference room in San Francisco looking at an orange box floating on a large flat screen. My goal is to make it disappear using nothing but thought. “Cheshire cat,” I think, and the box starts to fade.

No, I haven’t turned into the Mad Hatter, though the device I’m wearing may make me look like one. I’m trying out the Epoc headset, made by a company called Emotiv.

Earlier I calibrated the Epoc by thinking of commands for the orange box when the program asked for them: move left, move right, rise, drop, stop. For disappear, I thought of Lewis Carroll’s vanishing kitty. The Epoc just proved it can remember which areas of my brain lit up while I did that.

“Electric information from the brain is broadcast on the inside of the skull, which is how the headset picks it up,” says Tan Lee, president of Emotiv, via a videoconferencing system. (Like the company’s 10 research scientists, she is in Sydney; 20 employees work in San Francisco.) “By the time it gets to the skull, that information looks very different from the way it does on an MRI scan. So we basically had to unfold the cortex to learn how to read it.”

The $299 Epoc headset launches in early 2010, along with the Windows software that calibrates it. Emotiv’s four scientist-founders hope to make it the basis of a whole new system of computer game playing: “Pressing a button to cast a magic spell doesn’t give you a fulfilling experience,” Lee explains. “But thinking that spell does.”

The Epoc’s tendrils are set to stretch far beyond games. Emotiv has received requests for developer kits from 10,000 software engineers around the world. Applications have been suggested in industries such as aerospace, education and healthcare. Some people with disabilities are already using the Epoc to control their wheelchairs.

The most fascinating — and disturbing — thing about the Epoc is that its software can read emotional states like anxiety, frustration, excitement and engagement. In the calibration software, they are shown rising and falling on a graph in real time, like seismic readings. The idea is that game designers will be able to adjust the difficulty of a given level if you’re frustrated, or change musical tempos depending on your excitement.

As with all transformative technology, the Epoc’s mind-reading abilities are bound to have unintended consequences. I couldn’t ask a question in my interviews at Emotiv without my anxiety level rising on the graph. The days when journalists can smile through dull pitches while keeping their real feelings hidden may be numbered.

Play-it-safe startups, you have been warned.

Courtesy CNN.

Invisible Power

Posted by Max On December - 6 - 2009 2 COMMENTS

powergeneratorMarin Soljacic couldn’t sleep. The problem was his wife’s Nokia cell phone. The tyrannical device beeped on the bedside table when it needed to be plugged in. It could not be disabled.

Instead of taking a hammer to the phone, Soljacic marveled at the fact that this device, and billions of others like it, was sitting a few feet away from all the electricity it could ever need. Why couldn’t it receive power wirelessly, just as laptops get Wi-Fi?

Being a physics professor, not an electrical engineer, Soljacic didn’t know the history of failed attempts to produce wireless electricity. (Thomas Edison and his rival Nikola Tesla were among the first to envision long-distance power-beaming.) Soljacic also didn’t pause to consider conduction, the kind of close-range charging used in electric toothbrushes, which is about as far as wireless electricity got before him.

Soljacic learned that if you could get two magnetic fields to resonate — to sing the same note, in effect — they could transfer an electric current. With two large magnetic coils, he found in an experiment described in Science magazine in 2007, you can throw 60 watts across a room, powering a lightbulb. (Keeping the two resonators in perfect harmony over a distance is not simple; Soljacic spent several years running lab experiments before he built a system that worked reliably.)

MIT, his employer, quickly patented the technology (Soljacic’s name is on the patent) and encouraged Soljacic to start a company. He would sit on the board but find executives to run it full time. The result can be found on the second floor of a brick building in Cambridge, Mass. leased to the company by the big-and-tall tailor on the ground level.

WiTricity’s 15 employees are hard at work proving that Soljacic’s magnetic coils can power almost any electrical device. David Schatz, director of business development, shows me a TV, a DVD player and a computer, all of them wireless.

“This was our No. 1 request from business users,” Schatz says, switching on a projector. “Look: no batteries, no wires, nothing up my sleeve.” The coil sending out the power is hidden behind an abstract painting that the CEO’s wife rescued from their basement.

Schatz is the first to admit that the housing they’ve hurriedly built for the receiving coils is too bulky. “No one would want to buy this,” he says, pointing to the pack that juts out from the back of the laptop, a pregnant plastic bulge that’s about a third as large as the device itself.

Given sufficient cooperation from equipment manufacturers, WiTricity is confident that it can incorporate its coil into the guts of any device. (Think of how computermakers like Apple (AAPL,Fortune 500) turned bulky Webcams into fingernail-size lenses that fit in a thin laptop case.) CEO Eric Giler, a veteran tech executive who ran a telecom company for 22 years, understands the importance of letting potential partners play with patented technology.

So far about a dozen companies — including Intel (INTC, Fortune 500) and Sony (SNE) — have tried replicating Soljacic’s groundbreaking MIT experiment in their own research facilities, just to make sure it’s the real deal. That might make other CEOs nervous, but not Giler.

“Our best customers are going to be the guys who try to do this,” he says, “because it is really hard.” The company is also talking to furniture manufacturers about fitting coils into desks and cubicle walls. The first announcement of a WiTricity partner product is expected toward the end of 2010.

Most of Giler’s potential customers have one major question: safety. “There’s a real perceptual problem,” he says. “People think we’re putting electricity in the air, and that’s called lightning, and they know to stay away from that.”

In fact, the coils turn electricity into magnetic fields, then back into electricity. And as any physicist will tell you, magnetic fields interact weakly with humans; as far as the fields are concerned, we are no different from air. (The Earth itself exudes a magnetic field.)

Initially, Giler was skeptical. Magnetism from MRI machines can disable pacemakers. Wouldn’t wireless electricity pose similar risks? Soljacic replied that MRI magnetism is about 10,000 times stronger than his version. The Institute of Physics in London concurs: WiTricity’s magnetic field “has no detrimental effects on the human body.”

Giler makes a point of standing between the coils whenever he demonstrates the technology. At the Nikkei electronics conference in Tokyo in October, he was able to power a 1,000-watt klieg light from across the room — a far cry from that 60-watt lightbulb in Soljacic’s first experiment. “We’re going up the power curve,” he says.

WiTricity’s record so far is 3,000 watts — enough to fully charge an electric car, so long as it’s in the same room (or garage). How big could WiTricity get? “Every single person in the world can relate to the problem of running out of batteries or having wires everywhere,” Giler says. “The market is so potentially huge that numbers become meaningless.”

A wireless electric world could free up designers to create entirely new kinds of products, no longer hemmed in by the need for boxy batteries or power supplies. As one of Giler’s VC investors says, “I bet you that’s your bestseller in five years’ time. You don’t even know what it is yet.”

Courtesy CNN.

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