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Comment Carbon powder, not sugar (Score 4, Insightful) 152

It seems to me pretty disingenuous to say that the batteries are using sugar when it's really just carbon powder (which can be made from sugar).

But we're not talking sugar straight out of the paper packet. Before it can be used as the anode in a sodium-ion battery, sucrose powder is turned into hard carbon powder by heating it to up to 1,500 degrees celsius in an oxygen-free oven

Comment Re:maybe the article is flat out wrong (Score 3, Informative) 207

That's not necessarily true. The Adreno 225 in the current Krait is slower than the 320 that'll be coming later in the year but it still trades benchmarks with Tegra3 in graphics tests.


Notably, the GLbenchmark offscreen test where the Tegra3 wins the most by, has a severe bug somewhere.

Submission + - Faster-than-light neutrinos may be error caused by loose cable (sciencemag.org) 2

semi-extrinsic writes: "Everyone remembers the faster-than-light neutrinos reported by the OPERA experiment in collaboration with CERN last year. ScienceInsider now reports that the headline-causing result may turn out to be a measurement error caused by a loose cable:

"According to sources familiar with the experiment, the 60 nanoseconds discrepancy appears to come from a bad connection between a fiber optic cable that connects to the GPS receiver used to correct the timing of the neutrinos' flight and an electronic card in a computer."

The report comes from an anonymous source, and is yet unconfirmed, but if confirmed would be a disappointing result for all those hoping that we had stumbled across new physics."

Comment Re:Not required.. (Score 1) 137

Agree 100%

The two biggest power draws are the screen and radios. This is what needs to be made more efficient.

With proper GUI design and AMOLED screens, the screen power draw can be drastically reduced but things like the 3G radio drain power like mad if the signal isn't perfectly strong (while 4G radios gobble power under all circumstances).

Comment Re:what (Score 1) 691

Or rather, shit happens and the designs work better than they were engineered for.


The reactors, built 40 years ago, using an old less safe design, engineered for 8.0 earthquakes, survived a 9.0 (it was upgraded) earthquake and a tsunami as well as a hydrogen explosion of the outer building with the all-important containment building still completely intact.


If people were sane and less reactionary, this is actually quite the demonstration of how incredibly resilient it all was.
Education

School Swaps Math Textbooks For iPads 439

MexiCali59 writes "Four of California's largest school districts will be trying something new on eighth-grade algebra students this year: giving them iPads instead of textbooks. The devices come pre-loaded with a digital version of the text, allowing students to view teaching videos, receive homework assistance and input assignment all without picking up a pen or paper. If the students with iPads turn out to do improve at a faster pace than their peers as expected, the program could soon spread throughout the Golden State."

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