Tag: facebook

You’ve Got 25 Years Until UNIX Time Overflows

CowboyRobot writes “In 25 years, an odd thing will happen to some of the no doubt very large number of computing devices in our world: an old, well-known and well-understood bug will cause their calculation of time to fail. The problem springs from the use of a 32-bit signed integer to store a time value, as a number of seconds since 00:00:00 UTC on Thursday, 1 January 1970, a practice begun in early UNIX systems with the standard C library data structure time_t. On January 19, 2038, at 03:14:08 UTC that integer will overflow. It’s not difficult to come up with cases where the problem could be real today. Imagine a mortgage amortization program projecting payments out into the future for a 30-year mortgage. Or imagine those phony programs politicians use to project government expenditures, or demographic software, and so on. It’s too early for panic, but those of us in the early parts of their careers will be the ones who have to deal with the problem.” Read more of this story at Slashdot.

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You’ve Got 25 Years Until UNIX Time Overflows

Quadruple DNA Helix

Sometimes the double helix likes to mix it up! Scientists at the University of Cambridge, United Kingdom, have found that DNA at the end of chromosomes actually have a very different structure: instead of double-stranded, they have four strands. Balasubramanian’s group has been pursuing a four-stranded version of the molecule that scientists have produced in the test tube now for a number of years. It is called the G-quadruplex. The “G” refers to guanine, one of the four chemical groups, or “bases”, that hold DNA together and which encode our genetic information (the others being adenine, cytosine, and thymine). The G-quadruplex seems to form in DNA where guanine exists in substantial quantities. Jonathan Amos of BBC has the post: Link

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Quadruple DNA Helix

How the wave of a wand can detect bleeding in the brain

The Infrascanner Model 2000, which uses near-infrared technology to screen for intracranial hematomas, is intended for use on battlefields, in hospitals, and on the sidelines of high-contact sports. [Read more]

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How the wave of a wand can detect bleeding in the brain

Cuba Turns On Submarine Internet Cable

angry tapir writes “A change in Internet traffic patterns over the past week suggests that Cuba may have turned on a fiber-optic submarine cable that links it to the global Internet via Venezuela. Routing analyst firm Renesys noticed that the Spanish telecommunications company Telefónica began routing Internet traffic to Cuba’s state telecommunications company, Empresa de Telecomunicaciones de Cuba S.A. (ETECSA). The Internet traffic is flowing with significantly lower latencies than before, indicating the connection is not solely using the three satellite providers that Cuba has relied on in the past for connectivity.” Read more of this story at Slashdot.

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Cuba Turns On Submarine Internet Cable

Replicating Hardest Known Biomaterial Could Improve Solar Cells and Batteries

cylonlover writes “Inspired by the tough teeth of a marine snail and the remarkable process by which they form, assistant professor David Kisailus at the University of California, Riverside is working toward building cheaper, more efficient nanomaterials. By achieving greater control over the low-temperature growth of nanocrystals (abstract), his research could improve the performance of solar cells and lithium-ion batteries, lead to higher-performance materials for car and airplane frames, and help develop abrasion-resistant materials that could be used for anything from specialized clothing to dental drills.” Read more of this story at Slashdot.

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Replicating Hardest Known Biomaterial Could Improve Solar Cells and Batteries

Stupid California Cost Itself $600 Million Over Stupid Facebook IPO

It’s generally a bad idea to base your budget on hypothetical money that may or may not end up in your pocket. It’s a much worse idea if you’re the state of California, and that money is wacky Facebook cash . More »

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Stupid California Cost Itself $600 Million Over Stupid Facebook IPO

Researchers create two different kinds of lava lamp… for science!

Okay, technically this isn’t a lava lamp, but you could have fooled me, given the mellow music and the drifting plumes of colored liquid. Researchers at Cambridge performed an experiment to find out more about fluid dynamics by coming up with two completely different ways that liquids can mix due to Rayleigh-Taylor instability, along with a video to watch if/when you’re stoned. More »

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Researchers create two different kinds of lava lamp… for science!