from Gizmodo by Addy Dugdale
When researchers at the Universidad Politécnica de Valencia needed a lab scanner, but didn't have the cash to pay for it, they didn't panic. Instead, Angel Maqueira and his colleagues bought a bog-standard CD player &mdash and hacked it, saving themselves a potential $70,000 in the process.
By soldering two additional light sensors inside the CD player, and then using software, the researchers were able to control how the device "played" a disk. The substance to be analyzed (in this case, the team was trying to detect traces of three different pesticides in various samples) was then placed on a normal compact disc, and inserted into the machine.
While the first light sensor identified where the sample was on the disc, using black marks on the edge of the disc, the second analyzed the sample itself, measuring the amount of laser light that was able to pass through the disk. Normally, discs reflect around 30 percent of the laser beam onto the reading head, while the rest passes through.
The sample, half a millimeter in size, was treated to produce dye or silver that was inversely proportional to the amount of pesticide in the sample. Using the modded CD player, they could detect pesticide levels as low as 0.02 micrograms per liter just by seeing how much laser light passed through the disc to the second sensor.
While it may not be as accurate as genuine lab sensors, which can cost between $42,000 and $85,000, the hacked CD player is accurate enough for many laboratory tasks &mdash some experts think the cheap and cheerful device would work wonders in developing countries, helping the fight against malaria, for instance. And the shorter wavelength lasers of Blu-ray and HD DVD technology will make the process even easier. [New Scientist]
Read More...
Summary only...
In a recent demonstration at DEMOFall '07, Fusion-io showed off its newest PCIe device, which reportedly "places the power of a SAN (storage area network) in the palm of your hand." Essentially, this single device boasts up to 640GB of storage capacity, delivers 100,000 IOPS (input / output per second) and can achieve sustained data rates of 800Mb/sec (read) and 600Mb/sec (write)." In marketing terms, the ioDrive can perform "nearly a thousand times faster than any existing disk drive," and it can reportedly be integrated into existing data centers or workstations without any alterations to your infrastructure. Next quarter, the outfit will begin shipping the card in 40GB, 80GB, 160GB and 320GB configurations (with the 640GB flavor to follow suit), but unfortunately, official prices have not yet been divulged. Oh, and be sure to check out a video of the ioDrive's unveiling here.
[Via TGDaily]
The American Chemical Society is claiming that the "holy grail" of the LED world has been reached. A pair of Indian Scientists have created a pure white LED. No longer will we have to suffer with odd blue- or yellow-like white LED's. The method used to achieve the white color was so blatantly obvious, they used "phosphors made from semiconductor nanocrystals of cadmium sulfide mixed with manganese." The scientific duo is currently attempting to raise its production consistency so that it can be brought to the masses. [
Posts
