- Twitter Happiness Levels Soar As People Travel Further From Home
Happiness levels caputred by Tweets rise logarithmically with distance from our average location, say computer scientists studying Twitter sentiment
- A Startup’s Nanowire Ink Lifts Solar Cell Efficiency
Sol Voltaics plans to make a nanowire-laden ink to boost solar panel efficiency using a rapid manufacturing process.
Ink filled with microscopic semiconductors called nanowires could make solar power cheaper by boosting the efficiency of solar panels by 25 percent, without adding much cost to manufacturing, says Sol Voltaics, a startup that has raised $11 million, and which this week announced its intention to commercialize the ink.
- AT&T Researchers Set a Long-Haul Data Record
New optical technology paves the way for more efficient ocean-spanning transmissions.
Researchers at AT&T have devised a way to increase the distance that large amounts of data can travel through a fiber-optic connection. The technique should allow 400-gigabit-per-second signals to travel for a distance of 12,000 kilometers—four times the previous distance possible—and it promises faster ocean-crossing transmission without adding more equipment. The feat is like sending 170 HD movies 12,000 kilometers—half-again as far as the distance from San Francisco to Tokyo.
- One App’s iOS Debacle Shows Dangers of Betting It All on Apple
A popular app gets yanked from Apple’s App Store, illustrating the danger of betting it all on one mobile OS.
AppGratis, an iOS app that offers users a free app each day that they’d normally have to pay for, is having a rough week. On Friday, Apple removed AppGratis from its app store, saying it ran afoul of two store guidlines: one banning apps that promote other apps, and another banning use of push notifications to send ads or direct marketing.
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