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Math

New Analysis Pushes Back Possible Origin For Antikythera Mechanism 13

Posted by timothy
from the spin-the-dials-backwards dept.
We've mentioned several times over the years the Antikythera Mechanism, the astounding early analog computer recovered from a Greek shipwreck in shape good enough to allow modern recreations. The device has been attributed to different Greek mathemeticians and thinkers, such as Archimedes, Hipparchus, and Posidonius, but as reader puddingebola writes, "Current research suggests its origin may be much earlier, and its working based on Babylonian arithmetical methods rather than Greek Trigonometry, which did not exist at the time. Puddingebola excerpts from the NYT article: Writing this month in the journal Archive for History of Exact Sciences, Dr. Carman and Dr. Evans took a different tack. Starting with the ways the device's eclipse patterns fit Babylonian eclipse records, the two scientists used a process of elimination to reach a conclusion that the "epoch date," or starting point, of the Antikythera Mechanism's calendar was 50 years to a century earlier than had been generally believed.

Comment: Re:process it in the biggest nulear reactor we hav (Score 1) 76

by HiThere (#48482339) Attached to: Shale: Good For Gas, Oil...and Nuclear Waste Disposal?

Geosync orbit is a bad idea. That orbit is very useful for other purposes and already a bit crowded.

OTOH, it wouldn't need to be *very* much higher to be much more reasonable...but be sure to put it all in one place. You don't want even more junk spread around.

Comment: Re:hum (Score 1) 259

by HiThere (#48482313) Attached to: Debian Forked Over Systemd

Well, I'm a current Debian user, and I switched from testing to stable because of problems with systemd. OTOH, there's a good reason that it's called testing.

Still, while I don't hate systemd, I also don't trust it. My current intention is to remain on stable while things shake themselves out, and then decide what to do. And the Devuan timeline doesn't show it being available even as a "testing" distribution until next spring. (I gather the current version is sort of a compromise between prototype and unstable[sid], or even experimental.)

By the time I need to decide, I expect I'll know how things are going to shake out. But I expect that I'll be keeping an eye on Devuan, and a few others. And perhaps systemd won't be as bad as I expect. Still, any init system that marks problems with its logging system as "won't fix" is dubious. That the main logging system is binary just makes things much worse. So does expansions like having the "init system" include things like terminal manager, etc. It even makes me tempted to go back to Etch (yah, that's a rediculuous thing to suggest, as the current stable works fine without systemd).

+ - Hey kids! Banned books! ->

Submitted by nbauman
nbauman (624611) writes "The Gilbert, AZ school board has voted to tear out a page from Campbell's Biology (a standard highly-recommended textbook that many doctors and scientists fondly remember), because it discusses contraception without also discussing adoption. Julie Smith, a member of the Gilbert Public Schools governing board, said that she was a Catholic and "we do not contracept." Smith convinced the board that Campbell's violates Arizona law to teach "preference, encouragement and support to childbirth and adoption" over abortion. The Arizona Education Department decided that the pages didn't violate Arizona law, but nevermind. Rachel Maddow generously risked hassles for copyright violation and posted the missing pages as a service to Arizona honors biology students. http://www.msnbc.com/rachel-ma..."
Link to Original Source
Medicine

Single Pixel Camera Takes Images Through Breast Tissue 36

Posted by timothy
from the one-at-a-time-folks dept.
KentuckyFC writes Single pixel cameras are currently turning photography on its head. They work by recording lots of exposures of a scene through a randomising media such as frosted glass. Although seemingly random, these exposures are correlated because the light all comes from the same scene. So its possible to number crunch the image data looking for this correlation and then use it to reassemble the original image. Physicists have been using this technique, called ghost imaging, for several years to make high resolution images, 3D photos and even 3D movies. Now one group has replaced the randomising medium with breast tissue from a chicken. They've then used the single pixel technique to take clear pictures of an object hidden inside the breast tissue. The potential for medical imaging is clear. Curiously, this technique has a long history dating back to the 19th century when Victorian doctors would look for testicular cancer by holding a candle behind the scrotum and looking for suspicious shadows. The new technique should be more comfortable.

Google News Sci Tech: OnePlus And Cyanogen Inc. Might Be Aimed For A Split - Techaeris->

From feed by feedfeeder

Firstpost

OnePlus And Cyanogen Inc. Might Be Aimed For A Split
Techaeris
It's been a rough year for OnePlus. They drummed up feverish interest in their phone only to have to turn away potential customers. They ran with a convoluted invite system, alienated their fans with some questionable forum contests, and now it seems that...
OnePlus and Cyanogen on brink of breakup after India fightEngadget
OnePlus One will run custom Android 5.0, not CyanogenMod, in IndiaPhoneDog
OnePlus One Indian Users Will Not Receive CyanogenOS OTA Updates For NowAndroid Headlines - Android News

all 38 news articles

Link to Original Source
Earth

France Wants To Get Rid of Diesel Fuel 172

Posted by Soulskill
from the send-it-to-us dept.
mrspoonsi sends this Reuters report: France wants to gradually phase out the use of diesel fuel for private passenger transport and will put in place a system to identify the most polluting vehicles, Prime Minister Manuel Valls said on Friday. Next year, the government will launch a car identification system that will rank vehicles by the amount of pollution they emit, Valls said in a speech. This will make it possible for local authorities to limit city access for the dirtiest cars. "In France, we have long favoured the diesel engine. This was a mistake, and we will progressively undo that, intelligently and pragmatically," Valls said. About 80 percent of French motorists drive diesel-powered cars. Valls said taxation would have to orient citizens towards more ecological choices, notably the 2015 state budget measures to reduce the tax advantage of diesel fuel versus gas.

Comment: Re:Lightsaber crossguard wtf (Score 2) 290

by TheRaven64 (#48481175) Attached to: First Star War Episode 7 Trailer Released

Which is exactly WHY having a group of religious nuts running around 'guarding' the universe by wielding energy swords with no hilts was completely ridiculous in the first place, especially when that very same universe was also populated by people wielding weapons with both physical and energy based ammo that simply would beat the reaction time of any human, force or no force

I wondered why no one ever came up with the idea of a blaster that fired three bolts in a slightly spreading triangle. The lightsaber is a line - it can only block two of them, no matter who fast its wielder is.

Comment: Re:Had a realization (Score 1) 290

by TheRaven64 (#48481113) Attached to: First Star War Episode 7 Trailer Released

Based on what I've seen from his Star Trek movies, his approach to storytelling is too intellectual- he's interested in complex storylines and clever plot twists

J. J. Abrams' Star Trek was Star Wars set in the Star Trek universe. I don't think he'll have a problem adapting to setting it in the Star Wars universe...

Comment: Re:Contamination (Score 1) 63

Another problem is that it's based on the fallacy that economics is a zero-sum game. And that physical money is a good analog of financial money. Both are false.

Another assumption is that feeding the starving is a reasonable approach. But population growth is exponential until a limiting factor is reached, and exponential growth cannot be sustained. Ever. So if you plan to "feed the starving multitude" you'd better have some plan in mind to feed twice that number of people in 20 years.

Personally, I think we are already beyond the sustainable capacity of the planet. We're emptying the seas of fish and the land of anything we can't eat. At some point we're going to crash, and crash badly. It would be highly deisreable if at that point there were some self-sufficient colonies elsewhere. But we are, to be optomistic, decades away from being able to do that.

+ - Researchers seek the origins of an early Analog Computer->

Submitted by puddingebola
puddingebola (2036796) writes "The Antikythera Mechanism is described as an early analog computer, used to predict the time of eclipses, and for astrological and astronomic instruction. Speculation about its origin has ranged from attributing it to different Greek Mathemeticians and thinkers, such as Archimedes, Hipparchus, and Posidonius, Current research suggests its origin may be much earlier, and its working based on Babylonian arithmetical methods rather than Greek Trigonometry, which did not exist at the time. From the article, "Writing this month in the journal Archive for History of Exact Sciences, Dr. Carman and Dr. Evans took a different tack. Starting with the ways the device’s eclipse patterns fit Babylonian eclipse records, the two scientists used a process of elimination to reach a conclusion that the “epoch date,” or starting point, of the Antikythera Mechanism’s calendar was 50 years to a century earlier than had been generally believed.""
Link to Original Source
Debian

Debian Forked Over Systemd 259

Posted by Soulskill
from the a-house-divided dept.
jaromil writes: The so called "Veteran Unix Admin" collective has announced that the fork of Debian will proceed as a result of the recent systemd controversy. The reasons put forward are not just technical; included is a letter of endorsement by Debian Developer Roger Leigh mentioning that "people rely on Debian for their jobs and businesses, their research and their hobbies. It's not a playground for such radical experimentation." The fork is called "Devuan," pronounced "DevOne." The official website has more information.

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