Pretty much the only place you see vacuum tubes any more is inside a quality audio amp. But, once upon a time, they were the primary ingredient in any piece of electronic equipment, including computers. The glass tubes have since been replaced with the smaller, less fragile and cheaper to manufacture silicon transistor. There are, however, disadvantages, to transistors. For one, electrons tend to move more slowly though the semiconductors, and two, they're highly susceptible to radiation. The second of those problems doesn't affect us much here on Earth, but for NASA it poses a major obstacle. Engineers have finally managed to combine the advantages of both vacuum tubes and silicon transistors, though, in what has been dubbed "nano vacuum tubes." They're created by etching tiny cavities in phosphorous-doped silicon, bordered on three sides by electrodes that form the gate, source and drain. The term "vacuum tube" is slightly misleading however, since there is no true vacuum in play. Instead, the source and drain are separated by just 150 nanometers, making it highly unlikely that flowing electrons would run into stray atoms. In addition to their space-worthy hardiness, they can also potentially operate at frequencies ten-times as higher than silicon transistors, making them a candidate to push terahertz tech from experimental to mainstream. For more, check out the source link.
[Image credit: Shane Gorski]
Nano vacuum tubes could give a second life to the guitarist's best friend originally appeared on Engadget on Sun, 27 May 2012 17:36:00 EDT. Please see our terms for use of feeds.
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That's the big secret Wall Street is struggling with, that push is the monetization model of mobile. Who cares what the UI is, or what the advertising surface is. The moment a push hits your screen, it comes down to a binary decision: do I want to know more, or do I already know enough. To make that decision, we need social metadata to help out. Who said this, who retweeted it, who @mentioned it, and how are these signals parsed to prioritize the queue.Source: http://feedproxy.google.com/~r/Techcrunch/~3/eukw3Fa10GI/
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Do you really think a black FM radio -- or even worse, one in an off-season shade of grape --- can get you through the summer? Radio maker Pure wants to correct your errant ways. The company is expanding its Evoke Mio radio line with six new "on-trend" color options. The radio is already available in black, teal, grape and cherry, and now Pure is adding pepper, mustard, paprika, sage, rose and seagrass shades. While the colors are new, the specs are the same as on the original model: there's digital and FM radio, space for 30 presets, an auxiliary input for a PMP and an auto-dimming OLED panel. The new Pure Evoke Mio collection will go on sale in June for £130 (it's unclear if the radios will head stateside as well).
Pure updates Evoke Mio radio with six new colors, thinks you need a new shade for summer originally appeared on Engadget on Sun, 27 May 2012 08:12:00 EDT. Please see our terms for use of feeds.
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Tarzan Ball is a tricky hook-and-pull physics game originally appeared on Download Squad on Mon, 21 Feb 2011 18:18:00 EST. Please see our terms for use of feeds.
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Smartphone displays are becoming larger in size, and along with that, we're seeing a nice trend that's bringing greater pixel density. While LG Display's newly-announced 1080p HD mobile display isn't the most pixel dense that we've seen -- a distinction that belongs to Toshiba -- the five-inch panel is more appropriate for consumer applications and boasts an impressive pixel density of 440ppi. Its 16:9 aspect ratio was designed with HD content in mind, and the LCD technology isn't anything to sneeze at, either: it's a variant of IPS known as Advanced High Performance In-Plane Switching (AH-IPS), which is said to boast wide viewing angles, fast response times and improved brightness efficiency. Best yet, it seems that consumers won't have long to wait before the panel works its way into consumer technology -- the five-inch HD display is set for availability during the second-half of this year. To learn more of the Retina Display-shattering deets, you'll find the full PR after the break.
LG Display debuts five-inch Retina Display killer with 1080p HD resolution and 440ppi pixel density originally appeared on Engadget on Sun, 27 May 2012 22:00:00 EDT. Please see our terms for use of feeds.
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Gargantuan SQL injection infects 3.8 million URLs, installs rogue antivirus originally appeared on Download Squad on Fri, 01 Apr 2011 05:30:00 EST. Please see our terms for use of feeds.
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