Showing posts with label Technology. Show all posts
Showing posts with label Technology. Show all posts
Thursday, June 14, 2012
Sunday, November 13, 2011
Tuesday, September 20, 2011
Wednesday, August 31, 2011
Monday, August 1, 2011
Social x-ray glasses can decode emotions, make your blind dates less awkward
You may consider yourself a world-class liar, but a new pair of "social x-ray" glasses could soon expose you for the fraud you really are. Originally designed for people suffering from autism, these specs use a rice grain-sized camera to pick up on a person's 24 "feature points" -- facial expressions that convey feelings of confusion, agreement and concentration, among others. Once recognized, these signals are analyzed by software, compared against a database of known expressions and then relayed to users via an attached headphone. If their date starts to feel uncomfortable, a blinking red light lets them know that it's time to shut up. Rosalina Picard, an electrical engineer who developed the prototype with Rana el Kaliouby, acknowledged that her algorithm still needs some fine tuning, but told New Scientist that the glasses have already proved popular with autistic users, who often have difficulty deciphering others' body language. No word yet on when these social specs could hit the market, but they'll probably make us even more anti-social once they do.
Saturday, July 30, 2011
Hand-hacking lets you pluck strings like a musical pro
WANT to learn a musical instrument, but can't find the time to practise? A device now under development can take control of your hand and teach you how to play a tune. No spirits of dead musicians are involved.
PossessedHand, being developed jointly by the University of Tokyo, Japan, and Sony Computer Science Laboratories, also in Tokyo, electrically stimulates the muscles in the forearm that move your fingers. A belt worn around that part of the subject's arm contains 28 electrode pads, which flex the joints between the three bones of each finger and the two bones of the thumb, and provide two wrist movements. Users were able to sense the movement of their hands that this produced, even with their eyes closed. "The user's fingers are controlled without the user's mind," explains Emi Tamaki of the University of Tokyo, who led the research.
Devices that stimulate people's fingers have been made before, but they used electrodes embedded in the skin, which are invasive, or glove-like devices that make it hard to manipulate an object. Tamaki claims that her device is far more comfortable. "The electric stimulations are similar to low-frequency massage stimulations that are commonly used," she says.
Having successfully hijacked a hand, the researchers tried to teach it how to play the koto, a traditional Japanese stringed instrument. Koto players wear different picks on three fingers, but pluck the strings with all five fingertips, so each finger produces a distinctive sound. A koto score tells players which fingers should be moved and when, and from this Tamaki and her team were able to generate instructions telling their device how and when to stimulate the wearer's muscles.
PossessedHand does not generate enough force to pluck the koto strings, but it could help novice players by teaching them the correct finger movements. Tamaki and her team found that two beginner players made a total of four timing errors when using PossessedHand, compared with 13 when playing unassisted. After prompting from the device, the players also made one less mistake about which finger to use.
Perhaps not surprisingly, the players found it unsettling to have the device move their hand by itself. "I felt like my body was hacked," said one. Tamaki is confident that people will get used to the idea once they see how useful it can be: "We believe convenient technology will overcome a feeling of fear."
As well as helping would-be musicians, PossessedHand could be used to rehabilitate people who have suffered a stroke or other injury that impairs muscle control. Therapists already use electrical muscle stimulation to help these people, but existing non-invasive devices can only achieve crude movements such as contracting the entire arm.
Henrik Gollee, who researches rehabilitation devices at the University of Glasgow, UK, says PossessedHand could help patients train a wider range of movements. "I was surprised by the level of fine movement they can actually achieve," he says.
Simon Holland, director of the Music Computing Lab at the Open University in Milton Keynes, UK, points out that there is a big difference between learning to play one song and being a competent musician. "You might learn a fingering and be able to reproduce that performance, without necessarily being able to perform simple variants," he says.
Friday, June 3, 2011
Thursday, April 14, 2011
Saturday, March 26, 2011
Debian Is the Most Important Linux
Without Debian we are nothing. Debian is the most influential and important Linux, and is unique for being the largest, oldest, 100% non-commercial community-driven distro. '...just under 63% of all distributions now being developed come ultimately from Debian. By comparison, 50 (15%) are based on Fedora or Red Hat, 28 (9%) on Slackware, and 12 (4%) on Gentoo.
Monday, February 28, 2011
Scientists Invent World's First Anti-Laser
Two scientists at Yale University have built the laser's first doppelganger: the anti-laser. While a conventional laser emits a constant beam of light in one direction, the anti-laser simply does the opposite. It takes that same steady light stream and interacts with it in such a way that it absorbs and cancels out the light. And scientists hope the strange creation could help the fight against cancer. A. Douglas Stone, one of the two researchers behind the project, said he came up with the idea for a 'nega-laser' when working with equations for a random laser with his partner in crime, Hui Cao. 'I figured, if we just somehow illuminated the cavity, and replaced the gain medium with something that tends to absorb light, we could essentially reverse the process,' Stone said. Oh, that makes sense.
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