Algorithm learns how to revive lost languages









































Like living things, languages evolve. Words mutate, sounds shift, and new tongues arise from old.












Charting this landscape is usually done through manual research. But now a computer has been taught to reconstruct lost languages using the sounds uttered by those who speak their modern successors.












Alexandre Bouchard-Côté at the University of British Columbia in Vancouver, Canada, and colleagues have developed a machine-learning algorithm that uses rules about how the sounds of words can vary to infer the most likely phonetic changes behind a language's divergence.












For example, in a recent change known as the Canadian Shift, many Canadians now say "aboot" instead of "about". "It happens in all words with a similar sound," says Bouchard-Côté.












The team applied the technique to thousands of word pairings used across 637 Austronesian languages – the family that includes Fijian, Hawaiian and Tongan.











Tracking human history













The system was able to suggest how ancestor languages might have sounded and also identify which sounds were most likely to change. When the team compared the results with work done by human specialists, they found that over 85 per cent of suggestions were within a single character of the actual words.












For example, the modern word for "wind" in Fijiian is cagi . Using this and the same word in other modern Austronesian languages, the automatic system reconstructed the ancestor word beliu and the human experts reconstructed bali.












Reconstructing ancient languages can reveal details of our ancient history. Looking at when the word for "wheel" diverges in the family tree of European languages helps us date the human settlement of different parts of the continent, for instance.












The technique could improve machine translation of phonetically similar languages, such as Portuguese and French.












Endangered languages could also be preserved if they are phonetically related to more widely spoken tongues, says Bouchard-Côté. He is now working on an online version of the tool for linguists to use.












Journal: PNAS, 10.1073/pnas.1204678110


















































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North Korea threatens "stronger" action after nuke test






SEOUL: North Korea said its nuclear test on Tuesday was only a "first" step and warned of stronger action if it was faced with tougher sanctions as a result.

"The latest nuclear test was only the first action, with which we exercised as much self-restraint as possible," the foreign ministry said in a statement carried by the country's official news agency.

"If the US further complicates the situation with continued hostility, we will be left with no choice but to take even stronger second or third rounds of action," it said without elaborating.

The statement came just hours after South Korea's spy agency chief warned Pyongyang might carry out another nuclear test or ballistic missile launch in the coming days or weeks.

North Korea said Tuesday's test was directly targeted at the United States. It accuses Washington of inciting global condemnation of its nuclear programme and of leading the sanctions charge in the UN Security Council.

The ministry statement said any measure like forced ship inspections or a sea blockade would be considered an "act or war" and trigger "merciless retaliations".

The UN Security Council was scheduled to meet in emergency session later Tuesday to discuss the international response to the latest test.

"The US should make a choice between taking the path of easing tension... or continuing on its current, wrong path of pursuing anti-DPRK (North Korea) policies and further escalating tensions," the ministry said.

- AFP/al



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Kumbh Mela: Pictures From the Hindu Holy Festival








































































































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Why we're building a €1 billion model of a human brain









































The Human Brain Project has just won a €1 billion research prize. Its director Henry Markram says the initiative will unify our understanding of the brain












Your project aims to recreate the human brain in a supercomputer. Why?
We want to reach a unified understanding of the brain and the simulation on a supercomputer is the tool. Today you have neuroscientists working on a genetic, behavioural or cognitive level, and then you have informaticians, chemists and mathematicians. They all have their own understanding of how the brain functions and is structured. How do you get them all around the same table? We think of the project as like a CERN for the brain. The model is our way of bringing everyone, and our understanding, together.












What do you hope will come of the project?
There are three goals. As the model becomes more accurate and behaves more like a brain, we could couple it to a robot and see the robot learning. Then we'll be able to trace the chain of events from molecules to cognition.












Second, we plan to collect data from hospitals around the world to search for biological signatures of disease. We believe this will give us a new classification of brain disease, which can be used to diagnose people objectively - not solely based on their symptoms.












And finally, we want to build neuromorphic computers, which would have processors that can learn, mimicking the way the brain does.












How close are you to recreating a brain?
We've developed an algorithm to work out some of the rules for how to reconstruct the brain. We can now make thousands of predictions that when tested are accurate, and we can reconstruct small brain circuits of up to about 1 million rat neurons. Now we've got to connect those groups of neurons to make brain regions, then connect the regions to make a computer model of a whole brain. Once we've modelled a rat brain, then we update the rules and gradually move towards a human model.












Could the model be too detailed?
People are afraid of detail and complexity. But a drug is a molecule. It doesn't hit a cell, or the brain, it hits other molecules. There's no reason why we shouldn't try to explain how all the molecules are interacting with one another. Sheer numbers do not equal complexity. One hundred billion neurons is numbers, not complexity.












What about criticisms that it drains funds from more readily achievable neuroscience?
That is an incredibly short-sighted view of how a big science project impacts the rest of the field. Take the Human Genome Project - you can criticise them for all the promises they made at the time, but we would be in the dark ages now if we hadn't done that project. It has benefitted every biologist and geneticist on the planet today.












Once completed, could the simulated brain ever become conscious?
When we couple the model to a robot, the robot will behave, and we'll see this in the way its neurons are firing. Does that mean it's conscious? That's a philosophical question - and an unresolved one.












This article appeared in print under the headline "One minute with... Henry Markram"




















Profile







Henry Markram is the director of the Human Brain Project at the Swiss Federal Institute of Technology in Lausanne (EPFL). The project just won a €1 billion European research prize











































If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.




































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US economy picks up, China might slow: OECD indicator






PARIS: Economic activity in the United States is rising, in the eurozone it is steadying, but in China and India the growth trend is slowing, leading indicators from the OECD showed on Monday.

The Organisation for Economic Cooperation and Development said that its index of leading indicators suggested that economic growth in the United States was "firming".

Activity in Britain was also firming but at a slower pace than seemed to be the case a month ago, the OECD said in its monthly report on composite leading indicators which are considered a reliable pointer to activity in six months' time.

In Japan and Brazil signs were emerging "of growth picking up."

For the 17 members of the eurozone, and notably in Germany and Italy, the leading indicators "point to a stabilisation in growth prospects" but in France "growth is expected to remain weak."

The OECD, which is a policy forum for 34 advanced economies but also monitors some other important economies, said that China and India appeared to be on a growth path but "below trend compared with more positive signals in last month's assessment."

The indicators for Canada and Russia continued to signal growth that was below trend, the OECD said.

-AFP/ac



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Most-viewed tech on CNET right now


Click through to find out where the Asus Transformer Pad Infinity TF700 falls on the list.


We spend a lot of time evaluating tech around here, looking at both the hardware and the software sides, and telling you which products we think are worth your hard-earned dough and which are best avoided. Behind the scenes, we're always keeping an eye on what you're looking at as well. Some gadgets are obviously going to draw a lot of attention, their appearance on the list of most viewed a given, but sometimes a product pops up that surprises us and gives a bit of insight into where consumer trends may be headed.


Without further ado, let's count down the top 20 products that you've clicked on the most over the past four weeks.


 
































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Android, iPhone, Windows Phone 8, BlackBerry? We break down which OS is right for you and why.





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Year of the Snake: The Serpent Behind the Horoscope


On February 10, people all around the world will ring in the Lunar New Year with paper lanterns and firecrackers. At the heart of it all sits the snake, a slithery reptile feared for its sharp fangs and revered for its undeniable charm. (Watch videos of some of the world's deadliest snakes.)

Those born in the Year of the Snake are said to be intelligent and quick thinking, but they can also be dishonest and prone to show off. Though based on Chinese astrology, some of these traits are similar to characteristics of the actual serpent.

Snakes are known to be great at outsmarting their predators and prey. Their colorful, patterned skin makes them some of the best tricksters in the animal kingdom. And despite a bad rap as frightening creatures, snakes never fail to fascinate scientists, explorers, and zoo-goers. (See pictures of snakes.)

With more than 3,400 recognized species, snakes exhibit incredible diversity in everything from behavior and habitats to skin colors and patterns.

"As a vertebrate lacking in limbs, all snakes look largely like other snakes, yet they succeed in tremendous diversity in multiple directions," said Andrew Campbell, herpetology collections manager at the University of Kansas Biodiversity Institute.

To usher in the Year of the Snake, Campbell and herpetologist Dennis Ferraro at University of Nebraska-Lincoln weigh in on some of the snake's qualities that the Chinese zodiac predicts people born this year will have.

Horoscope: Snakes have an innately elegant personality but can also be ostentatious at times.

In Nature: Snakes come in all different colors, patterns, and textures, making them some of nature's most visually stunning creatures.

According to Campbell, the utility of their coloring falls into two main categories: to use as camouflage and to warn predators to stay away.

Among the most beautiful are the emerald tree boa (Corallus caninus)—whose vibrant green body is decorated with white stripes resembling lightning bolts—and the Brazilian rainbow boa (Epicrates cenchria), characterized by its iridescent skin and the large black rings down its back.

For some snakes, the diversity in color occurs within the same species, which is why Ferraro tells his student not to identify snakes by colors. For example, the polymorphic bush viper (Atheris squamigera), many of which are green, also come in shades of yellow, orange, red, and blue, as captured in photographer Guido Mocafico's "Serpent Still Life" photo series.

Horoscope: The snake is known to be the master seducer of the Chinese zodiac.

In Nature: Female garter snakes (Thamnophis) have all the luck with the gentlemen.

When a female garter snake is ready to mate, she announces it by producing chemicals called pheromones. Males, upon encountering the scent, immediately come crawling out and gather around the female in a large, wriggling "mating ball."

The competition intensifies when a male passing by the ball tries to fool the others by producing a scent that mimics that of the female, said Ferraro.

As soon as his rivals are led off in the wrong direction, the trickster slides right in. In areas with smaller populations of garter snakes, each ball consists of about 12 males and one female.

But in places like Manitoba, Canada, where garter snakes travel to certain areas to mate after coming out of hibernation, a mating ball can have thousands of males and only a hundred females.

Horoscope: Though snakes don't often tell lies, they will use deception when they feel it's necessary and they think they can get away with it.

In Nature: When it comes to using trickery to catch dinner, or to hide from predators, snakes are no amateurs.

Their sneaky techniques range from tricking fish to swim right into their mouths, to playing dead when threatened, to using their wormlike tails to lure in prey.

The most cunning of them all is the two-headed snake. To protect against a sneak attack from behind, the two-headed snake's tail looks just like its head. While the business end looks for food, the snake coils up its body and rests its tail on top to look like it is on guard.

The tail can even mimic the behavior of a retreating snake to trick predators into thinking they're going face-to-face with their opponent.

Horoscope: When snakes get down to work, they are organized and highly efficient, and they work quickly and quietly.

In Nature: While snakes are often perceived as lazy, Campbell said people are mistaken. "What we perceive as shy, lazy, or inactive is really efficiency," he said.

"On average, they are bigger than other lizards and can build a lot of body mass. They do that by being efficient in feeding and traveling." In other words, snakes don't move very much because they don't have to.

When it comes to food, snakes catch prey that are significantly larger than them so they can eat less frequently. This reduces the time they spend hunting and thus makes them less vulnerable to falling victim to a predator themselves.

For Campbell, the most impressive hunter is the eastern diamondback rattlesnake (Crotalus Adamanteus), which is able to hunt and kill its prey very quickly using venom, so it doesn't have to travel far. "Because they don't have to do that, they can become relatively large and heavy, being able to build up body mass and not having to spend that energy hunting."

Horoscope: Snakes are charming, with excellent communication skills.

In Nturea: For snakes, their visual and auditory senses don't mean much when it comes to communicating with each other.

Instead, they use their sense of smell and the chemicals produced by their musk glands. Unlike mammals, a snake picks up scent through the forks of its tongue.

When the snake retracts its tongue, it inserts the forks into grooves in an olfactory organ located at the roof of its mouth. Depending on which fork picks up a stronger scent, the snake knows in which direction to go when looking for prey or a mate.

It's when snakes are threatened that they use sight and sound, said Ferraro. Rattlesnakes, for example, shake their tails, making a loud rattling noise to ward off predators.


Read More..

Vatican Says Pope Benedict Will Resign Feb. 28













Pope Benedict XVI announced Monday that he would resign on Feb. 28 because he was simply too infirm to carry on — the first pontiff to do so in nearly 600 years. The decision sets the stage for a conclave to elect a new pope before the end of March.



The 85-year-old pope announced his decision in Latin during a meeting of Vatican cardinals on Monday morning.



He emphasized that carrying out the duties of being pope — the leader of more than a billion Roman Catholics worldwide — requires "both strength of mind and body."



"After having repeatedly examined my conscience before God, I have come to the certainty that my strengths due to an advanced age are no longer suited to an adequate exercise of the Petrine ministry," he told the cardinals. "I am well aware that this ministry, due to its essential spiritual nature, must be carried out not only by words and deeds but no less with prayer and suffering.



"However, in today's world, subject to so many rapid changes and shaken by questions of deep relevance for the life of faith, in order to govern the barque of St. Peter and proclaim the Gospel, both strength of mind and body are necessary — strengths which in the last few months, has deteriorated in me to the extent that I have had to recognize my incapacity to adequately fulfill the ministry entrusted to me."



The last pope to resign was Pope Gregory XII, who stepped down in 1415 in a deal to end the Great Western Schism among competing papal claimants.



Benedict called his choice "a decision of great importance for the life of the church."








Pope Benedict Brings Message of Peace to Middle East Watch Video










The move sets the stage for the Vatican to hold a conclave to elect a new pope by mid-March, since the traditional mourning time that would follow the death of a pope doesn't have to be observed.



There are several papal contenders in the wings, but no obvious front-runner — the same situation when Benedict was elected pontiff in 2005 after the death of Pope John Paul II.



When Benedict was elected pope at age 78 — already the oldest pope elected in nearly 300 years — he had been already planning to retire as the Vatican's chief orthodoxy watchdog to spend his final years writing in the "peace and quiet" of his native Bavaria.



Contenders to be his successor include Cardinal Angelo Scola, archbishop of Milan, Cardinal Christoph Schoenborn, the archbishop of Vienna, and Cardinal Marc Ouellet, the Canadian head of the Vatican's office for bishops.



Longshots include Cardinal Timothy Dolan of New York. Although Dolan is popular and backs the pope's conservative line, the general thinking is that the Catholic Church doesn't need a pope from a "superpower."



All cardinals under age 80 are allowed to vote in the conclave, the secret meeting held in the Sistine Chapel where cardinals cast ballots to elect a new pope. As per tradition, the ballots are burned after each voting round; black smoke that snakes out of the chimney means no pope has been chosen, while white smoke means a pope has been elected.



Popes are allowed to resign; church law specifies only that the resignation be "freely made and properly manifested."



Only a handful have done so, however and there's good reason why it hasn't become commonplace: Might the existence of two popes — even when one has stepped down — lead to divisions and instability in the church? Might a new resignation precedent lead to pressures on future popes to quit at the slightest hint of infirmity?



Benedict himself raised the possibility of resigning if he were simply too old or sick to continue on in 2010, when he was interviewed for the book "Light of the World."



"If a pope clearly realizes that he is no longer physically, psychologically and spiritually capable of handling the duties of his office, then he has a right, and under some circumstances, also an obligation to resign," Benedict said.



The former Cardinal Joseph Ratzinger had an intimate view as Pope John Paul II, with whom he had worked closely for nearly a quarter-century, suffered through the debilitating end of his papacy.



———



Daniela Petroff contributed from Vatican City.



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Time to rinse! AI assistant helps clean your teeth









































FOR most of us, brushing our teeth is just a tedious part of the daily grind. But for people with dementia or learning difficulties, such tasks can be difficult. They could soon gain more independence thanks to an AI designed by Christian Peters at Bielefeld University in Germany and his colleagues.












Peters has already come up with a system that guides people when washing their hands. Brushing teeth is more complicated because it involves many steps - such as putting toothpaste on the brush, filling a glass with water or rinsing the mouth.












The TEBRA system uses a video camera to monitor someone brushing their teeth and checks that each step happens at the right time. It prompts them via a screen on the washstand if they forget a step or if they get stuck. The idea is not to dictate a routine, but to adapt to that of the user, says Peters.












TEBRA is being tested at a care home in Bielefeld for people with learning disabilities. Caregivers there reported that the system was less distracting for some people than a human carer. The work will be presented at the International Conference on Health Informatics in Barcelona, Spain, next week. Peters also plans to adapt his system to tasks such as shaving.












This article appeared in print under the headline "Time to rinse! An AI to help you clean your teeth"




















































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LNY festivities at Marina Bay Sands in full swing






SINGAPORE: Shoppers at Marina Bay Sands were in for a treat on Sunday as festivities to usher in the Lunar New Year of the Snake got into full swing.

Stilt-walkers dressed as the Gods of Prosperity, Wealth, and Longevity mingled with the crowds while mascots representing the 12 animals of the Zodiac paraded round the skating rink and posed for pictures with delighted shoppers.

A lion dance troop also traipsed from store to store, adding more cheer to the already festive atmosphere.

- CNA/ck



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