Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror
Power

Making a Better Solar Cooker 167

New submitter jank1887 writes "Back in 2010, the aid organization Climate Healers gave a number of solar-powered cookstoves to rural Indian villages. The stoves were rejected by the communities, mainly because they were useless when they were wanted most: for the evening meal sometimes after the sun goes down, and for breakfast before the sun has risen. Following this, the group issued a challenge to EngineeringForChange. Details of the challenge include the need to provide 1kW of heat at about 200C for two hours in both early morning and late evening, and the users should be able to cook indoors, while sitting. A number of groups, mainly at U.S. and Indian engineering institutions, accepted the challenge, and developed potential solutions. Now, almost a year later, the ten finalist designs have been selected. The actual papers have been posted to the E4C challenge workspace. The goals of most of the designs are to keep the technology simple, although there are a few exceptions, and many include sand-, oil-, and salt-based concentrated thermal storage. Many reports include some level of discussion on the social and economic considerations, barriers to acceptance and sustainability, and how to overcome initial resistance to adoption."
The Military

The Iraq War, the Next War, and the Future of the Fat Man 380

An anonymous reader writes "The Stanford Law Review Online has just published an Essay by Yale's Stephen L. Carter entitled 'The Iraq War, the Next War, and the Future of the Fat Man.' He provides a retrospective on the War in Iraq and discusses the ethical and legal implications of the War on Terror and 'anticipatory self-defense' in the form of drones and targeted killings going forward. He writes: 'Iraq was war under the beta version of the Bush Doctrine. The newer model is represented by the slaying of Anwar al-Awlaki, an American citizen deemed a terror threat. The Obama Administration has ratcheted the use of remote drone attacks to unprecedented levels — the Bush Doctrine honed to rapier sharpness. The interesting question about the new model is one of ethics more than legality. Let us assume the principal ethical argument pressed in favor of drone warfare — to wit, that the reduction in civilian casualties and destruction of property means that the drone attack comports better than most other methods with the principle of discrimination. If this is so, then we might conclude that a just cause alone is sufficient to justify the attacks. ... But is what we are doing truly self-defense?'"
Privacy

Out of Business, Clear May Sell Customer Data 77

narramissic writes "Earlier this week, the Clear airport security screening service ceased operations, leaving many to wonder what would become of the personal information, including credit card numbers, fingerprints, and iris scans, of Clear's customers. And now we know. The information could be sold to the provider of a similar service. Until then, Clear has erased PC hard drives at its airport screening kiosks and is wiping employee computers, but the information is retained on its central databases (managed by Lockheed Martin). Clear customer David Maynor, who is CTO with Errata Security in Atlanta, wants Clear to delete his information but that isn't happening, the company said in a note posted to its Web site Thursday. 'They had your social security information, credit information, where you lived, employment history, fingerprint information,' said Maynor. 'They should be the only ones who have access to that information.'"
Businesses

Roku Box Adds HD, Grows Beyond Netflix 95

DeviceGuru writes "Roku has announced two free updates to its Internet-enabled Netflix movie-streaming set-top box. The initial update adds advanced compression capable of streaming HD video over average consumer broadband connections, while the second (expected during the first quarter of 2009) will add A/V streaming from sources other than Netflix (e.g. YouTube, Hulu, Comedy Central, MSNBC, etc.). Roku faces growing competition from other providers of Internet-based video-on-demand STBs, such as Blockbuster's STB, Syabas's Popcorn Hour (aka NMT), AppleTV, and others. Roku hasn't said anything specific, but perhaps it'll partner with Boxee, which already provides a popular AppleTV hack."
Networking

Intel Boosts Optical Communication Speeds 32

An anonymous reader writes "Intel has developed a device, the Avalanche Photodetector, that senses light pulses and amplifies output signals for faster data transfer over long distances. Researchers claim this is a big advancement in the field of silicon photonics, in which silicon is used to transfer light pulses for data exchange between chips and devices. APD can detect light at higher frequencies and moves data at rates of 40Gbps, making it more sensitive and quicker than earlier photodetectors, at a tenth the cost."

Slashdot Top Deals

I am NOMAD!

Working...