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Comment Re:You first (Score 2) 207

by mambru (#59578894) Attached to: Barcelona's Car-Free Smart City Experiment

Above 30 km/h I believe, most of the noise comes from tires, so electric cars going at 50 km/h are almost as noisy. Carrer d'Aragó full of EVs or ICE vehicles is going to be almost as noisy. Plus newer EVs in Europe *have* to make noise for safety reasons:

  "the sound to be generated by the AVAS should be a continuous sound that provides information to the pedestrians and vulnerable road users of a vehicle in operation. The sound should be easily indicative of vehicle behaviour and should sound similar to the sound of a vehicle of the same category equipped with an internal combustion engine."

https://en.wikipedia.org/wiki/...

Comment Re:So then. (Score 1) 452

by mambru (#36670058) Attached to: Renewable Energy Production Surpasses Nuclear In the US

Note that an square of 400 x 400 km equals 160,000 km, not 400 km.

The amount of materials needed to cover such a square with a solar plant probably exceeds the world's production capacity for iron, aluminium etc in a calendar year (I made some rough numbers some years ago).
That is without counting the energy needed to build such a plant...
Social Networks

Could Open Source Render Facebook the Next AOL? 293

Posted by CmdrTaco from the can't-happen-fast-enough dept.
joabj writes "Now that Facebook has amassed more than 500 million users, a growing number of open source social networking developers are wondering if Facebook's photo sharing, status updates and other features wouldn't work better as Internet-wide standardized services. At the OSCON conference last week, the head of Identi.ca, an open source Twitter-like microblogging service, likened today's social networking services to the enormously proprietary online services of the early 1990s, like AOL or Prodigy. He suggested that just like SMTP and Sendmail standardized what were previously propriety e-mail services, so too could open source social networking stacks, like OStatus, render walled garden services like Facebook obsolete."
GNOME

Ubuntu's "Lucid Lynx" Enters Beta 366

Posted by timothy from the but-that-danged-button-arrangement-sucks dept.
ActionDesignStudios writes "The upcoming release of Ubuntu, titled 'Lucid Lynx,' has just entered the beta cycle. Alongside the usual desktop and server versions, a special version has been released that is designed to run on Amazon's EC2 cloud service. This release of Ubuntu does away with the brown 'Human' Gnome theme we've all become accustomed to, replaced by a new version Canonical says is inspired by light. The new release also includes much better integration with social networking services such as Twitter, identi.ca and Facebook, among others."
Google

Google Releases Chrome OS Tablet Concept Demo 237

Posted by Soulskill from the keeping-up-with-the-jobses dept.
MojoKid writes "With all of the iPad buzz stirring up the tech world over the past couple of weeks, Chrome OS has almost been forgotten. Though Google has yet to officially release the netbook-centric operating system to the public, the company continues to keep details flowing about their forthcoming lightweight operating system. In their own response to all the recent tablet fanfare, Google decided to release some teaser shots and a demo video of the Chrome OS running on a concept tablet device. The Chromium team suggests that a screen of 5" to 10" is optimal for enjoying Chrome OS and of course tablets, netbooks and MIDs all fit that size class rather well. Couple a streamlined Google-based OS with NVIDIA's Tegra 2 processor in a design like this and the iPad could have serious competition."
Earth

Laughing Gas Is Major Threat To Ozone Layer 306

Posted by timothy from the damn-you-street-racers-damn-you dept.
Hugh Pickens writes "The Christian Science Monitor reports that according to new research, nitrous oxide, the colorless, sweet-smelling gas with a long history as a medical and dental anesthetic is the next big threat to Earth's protective ozone layer. Its role in destroying ozone has long been recognized, as well as its role as a heat-trapping greenhouse gas but the new study puts nitrous oxide's ability to deplete ozone into numbers comparable to those used for other ozone-depleting gases covered by the 1987 Montreal Protocol. The researchers note that the health of the ozone layer has been improving since the adoption of the protocol and that nitrous oxide looms large today as an artificial destroyer of the ozone layer, in part because the emissions of other harmful chemicals have been so sharply reduced." (Continues.)

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