agregador de notícies

Tanzania Fossils May Pinpoint Critical Split Between Apes and Monkeys

slashdot.org - dc, 15/05/2013 - 21:32
sciencehabit writes "From the human perspective, few events in evolution were more momentous than the split among primates that led to apes (large, tailless primates such as today's gorillas, chimpanzees, and humans) and Old World monkeys (which today include baboons and macaques). DNA studies of living primates have estimated that the rift took place between 25 million and 30 million years ago, but the earliest known fossils of both groups date no earlier than 20 million years ago. Now, a team working in Tanzania has found teeth and partial jaws from what it thinks are 25-million-year-old ancestors of both groups. If the interpretations hold up (abstract), the finds would reconcile the molecular and fossil evidence and possibly provide insights into what led to the split in the first place."

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Interactive Raycaster For the Commodore 64 Under 256 Bytes

slashdot.org - dc, 15/05/2013 - 21:12
New submitter Wisdom writes "1bir (1 Block Interactive Raycaster) is a simple ray casting engine implemented only in 254 bytes to run on a stock, unexpanded Commodore 64. The name comes from the fact that on a C64 floppy disk, 1 block is equivalent to 254 bytes stored on a disk sector. In 254 bytes, 1bir sets up the screen for drawing, creates sine and cosine tables for 256 brads based on a simple approximation, casts rays into a 2D map that lives inside the C64 KERNAL ROM, renders the screen in coordination with KERNAL, evaluates 8-way joystick input and detects collision against walls. The ray casting core employs a brute force algorithm to determine visible walls, while the mapping portion supports both open-ended (infinitely looped) and traditional, closed maps. The source code in 6502 assembly is available, with extensive comments. A YouTube video showcases 1bir in a detailed manner with both kind of maps and more information, while a Vimeo video presents a shorter demonstration."

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Records Labels Prepare Massive 'Pirate Site' Domain Blocking Blitz

slashdot.org - dc, 15/05/2013 - 20:30
An anonymous reader writes "In their ongoing battle against websites said to infringe music copyrights, record labels have initiated a fresh wave of actions aimed at forcing UK ISPs to carry out domain blocking. This third wave is set to be the biggest so far, affecting as many as 25 domains and including some of the world's largest torrent sites and file-hosting search engines. Furthermore, the BPI – the entity coordinating the action – will ask courts to block U.S.-based music streaming operation, Grooveshark."

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The New Yorker</em> Launches 'Strongbox' For Secure Anonymous Leaks

slashdot.org - dc, 15/05/2013 - 19:47
Today The New Yorker unveiled a project called Strongbox, which aims to let sources share tips and leaks with the news organization in a secure manner. It makes use of the TOR network and encrypts file uploads with PGP. Once the files are uploaded, they're transferred via thumb-drive to a laptop that isn't connected to the internet, which is erased every time it is powered on and booted with a live CD. The publication won't record any details about your visit, so even a government request to look at their records will fail to find any useful information. "There’s a growing technology gap: phone records, e-mail, computer forensics, and outright hacking are valuable weapons for anyone looking to identify a journalist’s source. With some exceptions, the press has done little to keep pace: our information-security efforts tend to gravitate toward the parts of our infrastructure that accept credit cards." Strongbox is actually just The New Yorker's version of a secure information-sharing platform called DeadDrop, built by Aaron Swartz shortly before his death. DeadDrop is free software.

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Exploit Sales: the New Disclosure Debate

slashdot.org - dc, 15/05/2013 - 19:05
msm1267 writes "There are a lot of echoes of the disclosure debate in the current discussions about vulnerability exploit sales. The commercial exploit market has developed relatively quickly, at least the public portion of it. Researchers have been selling vulnerabilities to a variety of buyers – government agencies, contractors, other researchers and third-party brokers – for years. But it was done mostly under cover of darkness. Now, although the transactions themselves are still private, the fact that they're happening, and who's buying (and in some cases, selling) is out in the open. As with the disclosure debate, there are intelligent people lining up on both sides of the aisle and the discussion is generating an unprecedented level of malice."

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Possible Graphene Alternative Made From Hemp Waste

slashdot.org - dc, 15/05/2013 - 18:23
MTorrice writes "A low-cost chemical process can turn hemp fiber into carbon nanomaterials. Researchers used the materials to make devices called supercapacitors that provide quick bursts of electrical energy. Supercapacitors made with the hemp nanosheets put out more power than commercial devices can." According to one of the authors, "Hemp bast is a nanocomposite made up of layers of lignin, hemicellulose, and crystalline cellulose ... If you process it the right way, it separates into nanosheets similar to graphene." Perhaps the process could be applied to related plants (hops?) too.

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How Maintainable Is the Firefox Codebase?

slashdot.org - dc, 15/05/2013 - 17:41
An anonymous reader writes "A report released this morning looks at the maintainability level of the Firefox codebase through five measures of architectural complexity. It finds that 11% of files in Firefox are highly interconnected, a value that went up significantly following version 3.0 and that making a change to a randomly selected file can, on average, directly impact eight files and indirectly impact over 1,400 files. All the data is made available and the report comes with an interactive Web-based exploratory tool." The complexity exploration tool is pretty neat.

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Google I/O 2013 Underway: Watch For Updates

slashdot.org - dc, 15/05/2013 - 17:00
Google's I/O annual conference is ramping up at San Francisco's Moscone Center. Last year, in the conference keynote, the company took its biggest-yet dive into hardware when it introduced the Nexus 7 tablet, Google Glass, and the ill-fated Nexus Q. The secret is out on Glass, of course: this year, there's a pavilion inside the conference center where I'm sure they'll be showing off applications for it. (Quite a few of the people in the endless lines here are wearing their own, too.) Anticipating the announcements at I/O is practically its own industry, but it's easy to guess that there will be announcements from all the major pots in which Google has its many thousands of (tapping) fingers. Android, search, Chrome, mapping, and all the other ways in which the behemoth of Mountain View is watching what you do. You can watch the keynote talk (talks, really) streamed online from the main conference link above, but this story will be updated with highlights of the announcements, as well with stories that readers contribute. Update: 05/15 16:22 GMT by T : Updates below. Update: 05/15 19:02 GMT by T :Update details: Notes (ongoing) added below on maps, gaming, the Play store, Google+, and more. And, notable, Larry Page is (at this writing) on stage, with an unannounced Q & A session.

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Federal Judge Dismisses Movie Piracy Complaint

slashdot.org - dc, 15/05/2013 - 16:35
cluedweasel writes "A Federal judge in Medford, OR has dismissed a piracy case lodged against 34 Oregonians. Judge Ann Aiken ruled that Voltage Pictures LLC unfairly lumped the defendants into what she called a 'reverse class action suit' to save on legal expenses and possibly to intimidate them into paying thousands of dollars for viewing a movie that could be bought or rented for less than $10." The judge was not enthused that they offered to settle for $7500 while noting that potential penalties could be as much as $150,000.

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US Government Data Center Consolidation Behind Schedule, Cost Savings Uncertain

slashdot.org - dc, 15/05/2013 - 15:59
itwbennett writes "The goal of saving $3 billion by closing 1253 data centers is 'very realistic,' says David Powner, director of IT management issues at the U.S. Government Accountability Office — except that agencies haven't been able to track cost savings for the initiative. Eighteen months from the 2015 deadline, 'we have no idea how much we've saved the taxpayers,' said Steve O'Keeffe, founder of MeriTalk, an online community for government IT issues. This isn't the first snag in the project. Almost a year ago, Slashdot reported that the project was woefully behind schedule." The government released a summary of what data they do have (PDF), and at least the DoD expects to save $575 million next fiscal year. Also see the full GAO report.

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Pirate Bay Co-founder Peter Sunde Running For European Parliament

slashdot.org - dc, 15/05/2013 - 15:15
An anonymous reader writes "Peter Sunde aka brokep of TPB fame is going to run for European Parliament in 2014, as a Finnish Pirate Party candidate. As he still has a prison sentence to serve in Sweden, he might have to campaign from behind bars. 'Amusingly, the Pirate ticket in Finland could have been even bigger than it is now. Sunde informs TorrentFreak that he also reached out to Finnish-born Kim Dotcom to join the race, but the Megaupload founder currently has other priorities.'"

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Australian Government Initiates Covert Internet Censorship

slashdot.org - dc, 15/05/2013 - 14:33
An anonymous reader writes "Remember how the Australian Government tried to enact a big bad Internet filter on the population? Well, that effort failed, but now there's a new initiative in place. At least one government agency, the country's financial regulator, has quietly started issuing legal notices to ISPs requesting them to block certain types of websites deemed illegal. There's no oversight or appeals process, and already a false positive event has resulted in some 1,200 innocent websites being blocked from Australians viewing them. Sounds ideal, right?"

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Global Warming Shifts the Earth's Poles

slashdot.org - dc, 15/05/2013 - 13:51
ananyo writes "Global warming is changing the location of Earth's geographic poles, according to a study published this week. Researchers at the University of Texas, Austin, report that increased melting of the Greenland ice sheet — and to a lesser degree, ice loss in other parts of the globe — helped to shift the North Pole several centimeters east each year since 2005. From 1982 to 2005, the pole drifted southeast towards northern Labrador, Canada, at a rate of about 2 milliarcseconds — or roughly 6 centimetres — per year. But in 2005, the pole changed course and began galloping east towards Greenland at a rate of more than 7 milliarcseconds per year (abstract). The results suggest that tracking polar shifts can serve as a check on current estimates of ice loss. Scientists can locate the north and south poles to within 0.03 milliarcseconds by using Global Positioning System measurements to determine the angle of Earth's spin. When mass is lost in one part of a spinning sphere, its spin axis will tilt directly towards the position of the loss — exactly as the team observed for Greenland."

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Georgia Tech and Udacity Partner for Online M.S. in Computer Science

slashdot.org - dc, 15/05/2013 - 13:13
Georgia Tech and Udacity — the online courseware project led by Sebastian Thrun — have announced a plan to offer an accredited M.S. Computer Science program online. The two organizations are also working with AT&T. This is the first time a major university has made an actual degree available solely through the MOOC format. Getting a degree in this manner is going to be much cheaper than a traditional degree: "... students also will pay a fraction of the cost of traditional on-campus master’s programs; total tuition for the program is initially expected to be below $7,000." U.S. Secretary of Education Arne Duncan said, "Massive open online courses (MOOCs) have quickly become one of the most significant catalysts of innovation in higher education. As parents know all too well, America urgently needs new ideas about how to make higher education accessible and affordable. This new collaboration between Georgia Tech, AT&T and Udacity, and the application of the MOOC concept to advanced-degree programs, will further the national debate — pushing from conversations about technology to new models of instruction and new linkages between higher education and employers." Georgia Tech is looking at the big picture: "At present, around 160,000 master’s degrees are bestowed in the United States every year in computer science and related subject disciplines; the worldwide market is almost certainly much larger, perhaps even an order of magnitude larger."

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Larry Page's Vocal Cords Are Partially Paralyzed

slashdot.org - dc, 15/05/2013 - 10:11
theodp writes "Last summer, unspecified voice problems caused Google CEO Larry Page to miss Google's Annual Shareholder Meeting, the I/O conference, and a quarterly earnings call. Now, Page has come forward and revealed that he suffers from partial paralysis of each of his vocal chords, an 'extremely rare' condition. Not unlike what Sergey Brin and his wife are doing with Parkinson's research, Page and his wife will be funding and overseeing 'a significant research program' led by Dr. Steven Zeitels of Harvard Medical School."

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'Einstein's Planet' Becomes First Exoplanet Discovered Using New Method

slashdot.org - dc, 15/05/2013 - 08:38
cylonlover writes "Due to their relative faintness compared to their parent stars, most known exoplanets have been discovered using indirect detection methods – that is, detecting the effects they have rather than observing them directly. There are numerous indirect methods that have proven useful in the detection of exoplanets and now yet another, which relies on Einstein's special theory of relativity (abstract), has joined the list with the discovery of an exoplanet known as Kepler-76b."

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Major Advance Towards a Proof of the Twin Prime Conjecture

slashdot.org - dc, 15/05/2013 - 07:19
ananyo writes "Researchers hoping to get '2' as the answer for a long-sought proof involving pairs of prime numbers are celebrating the fact that a mathematician has wrestled the value down from infinity to 70 million. That goal is the proof to a conjecture concerning prime numbers. Primes abound among smaller numbers, but they become less and less frequent as one goes towards larger numbers. But exceptions exist: the 'twin primes,' which are pairs of prime numbers that differ in value by 2. The twin prime conjecture says that there is an infinite number of such twin pairs. Some attribute the conjecture to the Greek mathematician Euclid of Alexandria, which would make it one of the oldest open problems in mathematics. The new result, from Yitang Zhang of the University of New Hampshire in Durham, finds that there are infinitely many pairs of primes that are less than 70 million units apart. He presented his research on 13 May to an audience of a few dozen at Harvard University in Cambridge, Massachusetts. Although 70 million seems like a very large number, the existence of any finite bound, no matter how large, means that that the gaps between consecutive numbers don't keep growing forever."

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Gene Wolfe To Be Honored At Nebula Awards

slashdot.org - dc, 15/05/2013 - 06:03
New submitter hguorbray writes "One of my favorite Sci-Fi authors of all time, Gene Wolfe, will be honored with the Damon Night Grand Master award at the Nebula Awards weekend in San Jose this weekend. This Thursday night he will be doing a reading and Q&A along with Connie Willis (author of the Doomsday Book, Blackout/All Clear, etc.) at the San Jose Hilton. There will be a mass book signing event Friday including these authors and many others presented by San Francisco's Borderlands Books." Here are this year's Nebula Award nominees. The awards will be presented at a ceremony starting 7pm ET on Saturday.

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Data Center Operators Double As Energy Brokers

slashdot.org - dc, 15/05/2013 - 05:16
mattOzan writes "When data centers first opened in the 1990s, the tenants paid for space to plug in their servers with a proviso that electricity would be available. As computing power has soared, so has the need for electricity, turning that relationship on its head: electrical capacity is often the central element of lease agreements, and space is secondary. While lease arrangements are often written in the language of real estate, they are essentially power deals. 'Since tenants on average tend to contract for around twice the power they need, Mr. Tazbaz said, those data centers can effectively charge double what they are paying for that power. Generally, the sale or resale of power is subject to a welter of regulations and price controls. For regulated utilities, the average "return on equity" — a rough parallel to profit margins — was 9.25 percent to 9.7 percent for 2010 through 2012.'"

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iTunes: Still Slowing Down Windows PCs After All These Years

slashdot.org - dc, 15/05/2013 - 03:13
colinneagle sends this quote from an article at NetworkWorld: "I run a very nifty desktop utility called Rainmeter on my PC that I heartily recommend to anyone who wants to keep an eye on their system. One of its main features is it has skins that can monitor your system activity. Thanks to my numerous meters, I see all CPU, disk, memory and network activity in real time. the C: drive meter. It is a circle split down the middle, with the right half lighting up to indicate a read and the left half lighting up for write activity. The C: drive was flashing a fair amount of activity considering I had nothing loaded save Outlook and Word, plus a few background apps. At the time, I didn't have a Rainmeter skin that lists the top processes by CPU and memory. So instead, I went into the Task Manager, and under Performance selected the Resource Monitor. Under the Processes tab, the culprit showed its face immediately: AppleMobileDeviceService.exe. It was consuming a ridiculous amount of threads and CPU cycles. The only way to turn it off is to go into Windows Services and turn off the service. There's just one problem. I use an iPhone. I can't disable it. But doing so for a little while dropped the CPU meters to nothing. So I now have more motivation to migrate to a new phone beyond just having one with a larger screen. This problem has been known for years. AppleMobileDeviceService.exe has been in iTunes since version 7.3. People complained on the Apple boards more than two years ago that it was consuming up to 50% of CPU cycles, and thus far it's as bad as it always has been. Mind you, Mac users aren't complaining. Just Windows users."

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