বৃহস্পতিবার, ২ মে, ২০১৩

Best of both worlds: Towards a quantum Internet with combined optical and electrical technique

May 1, 2013 ? An Australian team led by researchers at the University of New South Wales has achieved a breakthrough in quantum science that brings the prospect of a network of ultra-powerful quantum computers -- connected via a quantum internet -closer to reality.

The team is the first in the world to have detected the spin, or quantum state, of a single atom using a combined optical and electrical approach.

The study is a collaboration between researchers from the ARC Centre of Excellence for Quantum Computation and Communication Technology based at UNSW, the Australian National University and the University of Melbourne. It is published in the journal Nature.

UNSW's Professor Sven Rogge said the technical feat was achieved with a single atom of erbium -- a rare earth element commonly used in communications -- embedded in silicon.

"We have the best of both worlds with our combination of an electrical and optical system. This is a revolutionary new technique, and people had doubts it was possible. It is the first step towards a global quantum internet," Professor Rogge said.

Quantum computers promise to deliver an exponential increase in processing power over conventional computers by using a single electron or nucleus of an atom as the basic processing unit -- a quantum bit, or qubit.

By performing multiple calculations simultaneously, quantum computers are expected to have applications in economic modelling, fast database searches, modelling of quantum materials and biological molecules and drugs, and encryption and decryption of information.

In a qubit, information is stored in the spin, or magnetic orientation, of the electron or nucleus. Due to a quantum property known as superposition, spin can not only be up or down, but in both states at once. To produce a functioning qubit, scientists must be able to control, or change, the spin state and then detect, or "read" it.

Professor Rogge said researchers had previously used either an electrical or an optical method to read the spin of a single atom, but not both methods together.

Lead author of the study, UNSW's Dr Chunming Yin, said the new approach opens up the possibility of using light to couple the atoms, or qubits, together to form a quantum computer.

"Using light to transfer information in the quantum state is easier than doing it electrically. Ultimately this will lead to quantum communications over long distances," Dr Yin said.

Associate Professor Matthew Sellars, of the Australian National University, said it was a step towards connecting a solid state quantum computer to what will be the quantum internet.

"The quantum internet will allow separate quantum computers to be integrated and it will enable encrypted communications."

Quantum communication systems will become critical for providing secure communications for government, military, defence, finance business and health industries.

To make the new quantum device, Associate Professor Jeffrey McCallum at the University of Melbourne used an ion implanter to shoot erbium atoms into a standard industrial silicon transistor.

When the atom was in a particular quantum state and laser light was shone on it, an electron was knocked off the atom. This was detected electrically, by the silicon transistor switching on.

Professor Rogge said the breakthrough was made possible by combining the expertise of the three groups. The next step would be to control the spin of the erbium atom, which should be relatively straightforward, and also to replicate their results using a phosphorus atom embedded in silicon.

The researchers said it will be at least another decade before the potential of quantum computation is fully realised.

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Story Source:

The above story is reprinted from materials provided by University of New South Wales, via EurekAlert!, a service of AAAS.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


Journal Reference:

  1. Chunming Yin, Milos Rancic, Gabriele G. de Boo, Nikolas Stavrias, Jeffrey C. McCallum, Matthew J. Sellars, Sven Rogge. Optical addressing of an individual erbium ion in silicon. Nature, 2013; 497 (7447): 91 DOI: 10.1038/nature12081

Note: If no author is given, the source is cited instead.

Disclaimer: Views expressed in this article do not necessarily reflect those of ScienceDaily or its staff.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_technology/~3/1ML-wqLeBm0/130501131841.htm

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Minnesota Gov. Mark Dayton lobbies for same-sex marriage (Star Tribune)

Share With Friends: Share on FacebookTweet ThisPost to Google-BuzzSend on GmailPost to Linked-InSubscribe to This Feed | Rss To Twitter | Politics - Top Stories News, RSS and RSS Feed via Feedzilla.

Source: http://news.feedzilla.com/en_us/stories/politics/top-stories/302931143?client_source=feed&format=rss

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Depression-era movie star Deanna Durbin dies

Celebs

12 hours ago


Deanna Durbin

Getty Images file

Deanna Durbin in 1940's "It's a Date."

She was a child star with a striking singing voice who retired from the business in her twenties, but Deanna Durbin, whose death at 91 was announced Tuesday, remained a beloved screen actress long after her star had faded.

The Deanna Durbin Society's newsletter announced her death, quoting her son Peter H. David, said the New York Times. He indicated that she died "a few days ago," but provided no other details. He also thanked fans for respecting her privacy.

Born in Winnipeg, Manitoba in 1921, Durbin was a familiar face to the Depression-era audiences who flocked to movie houses. Signed to MGM at 13, she made her first film alongside Judy Garland in the 1936 short "Every Sunday." The oft-repeated story is that MGM head Louis B. Mayer, away on a trip, instructed his employees to "drop the fat one" from the studio's contract -- and they let Durbin go, but Mayer had meant Garland.

She was picked up at Universal and the subsequent success of her next films, including "Three Smart Girls" (and its two sequels) were credited with keeping the studio aloft. A 1936 nationwide search for the actor who would give her her first screen kiss made news, and Robert Stack was the actor chosen for "First Love."

By 1946 she was the second-highest paid woman in America, just $5,000 behind Bette Davis. At the height of her success she was so internationally-recognized that Anne Frank had her picture on the bedroom in the attic where she and her family lived; the photo still hangs today.

Durbin was often cast in musicals, and had a clear soprano that permitted her to cover a range from pop tunes to opera. Still, when she auditioned for the lead role in Disney's "Snow White," Walt Disney reportedly considered the then 15-year-old as sounding mature for the part. She recorded dozens of songs, including recreations of her movie tunes that were released commercially, and standards including "Love's Old Sweet Song" and "God Bless America."

Unfortunately, she had a harder time adjusting to the light, fluffy roles that had brought her early success; critics weren't happy to see her as a prostitute in 1944's "Christmas Holiday," for example. It also affected her personal relationships, and she divorced her husband of two years, director Vaughn Paul, in 1943. She was married twice more, to producer Felix Jackson and Charles David (director of "Lady on a Train"). Her union with David lasted from 1950 until 1999, when he died.

Durbin made her last film in 1948 ("For the Love of Mary") and retired to a French farmhouse with David, never again dipping her toes into Hollywood waters. She gave almost no interviews, but was quoted in the Times as having said "I hated being in a goldfish bowl."

A letter she sent reporters in 1958 read in part: "I was a typical 13-year-old American girl. The character I was forced into had little or nothing in common with myself -- or with other youth of my generation, for that matter. I could never believe that my contemporaries were my fans. They may have been impressed with my 'success.' But my fans were the parents, many of whom could not cope with their own youngsters. They sort of adopted me as their ?perfect? daughter.?

She added, "I was never happy making pictures. I?ve gained weight. I do my own shopping, bring up my two children and sing an hour every day."

Source: http://www.today.com/entertainment/deanna-durbin-depression-era-film-heroine-singer-dead-91-6C9692845

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AOL's Video Hat Trick: A Slate Of Original Content, Be On Creative Studio, And A Deal With FreeWheel + Mediaocean For Multiscreen Ad Buys

aol on networkOnline video is booming, and today AOL (owner of TechCrunch) unveiled three new initiatives that spell out how it plans to tackle it: 15 original, unscripted shows; a new creative studio, Be On, to create branded videos; and a deal with FreeWheel and Mediaocean to add in AOL’s video inventory to its platform, so that media buyers looking for multiscreen investments across TV and online video can include AOL in the mix. The news was unveiled at the company’s 2013 Digital Content NewFront event, the upfront event where AOL presents its strategy for the year ahead to key advertisers and agencies. The slate of content is not AOL’s move into Netflix-style dramas (for now, at least). Instead, it plays on the network of sites that AOL already owns in the news and information space, which also includes other tech sites like Engadget as well as the Huffington Post. Up to now the AOL On network, the video network that AOL launched last year to span all of those sites and more (the videos go to YouTube and elsewhere) has been going pretty strong, with some 8 billion views in 2012. “We think we’ve reached the point at which it makes sense to produce more, to give us a more distinct voice,” Tal Simantov, GM of AOL On said. The list of shows includes “Fatherhood,” centered around Hank Azaria and his experiences as a first-time father; and “City.Ballet”, produced by Sarah Jessica Parker, covering the cut-throat world of the New York City Ballet. Simantov wouldn’t say how much AOL is investing in this but says that it will be in the “double-digits, an interesting number.” One reason that AOL is spinning out more content is because of a growing audience for the material, but it is also looking to sell significantly more ads against it. Part of that will be coming from the new Be On studio — this is the company’s branded content business, a creative studio that will partner with advertisers and agencies to produce branded content that combines its goViral acquisition with video distribution across AOL’s own network of sites plus third-party sites like YouTube, and AOL Studios production. The offering includes production, distribution, and analytics to measure how they perform. The move for content companies to move further into video ad production, leveraging their reputation with other content, is part of a wider trend — just yesterday,

Source: http://feedproxy.google.com/~r/Techcrunch/~3/rPQk0CEaWW8/

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বুধবার, ১ মে, ২০১৩

FDA May Approve Drugs to Counteract Nuclear Radiation

With the current state of things, it's nearly impossible to turn on the news without hearing some passing reference to chemical or nuclear warfare. And while we have at least some countermeasures ready to minimize damages from the former, it's the nuclear part that leaves us biologically defenseless.

Read more...

    


Source: http://feeds.gawker.com/~r/gizmodo/full/~3/yVF2QGMGatc/fda-may-approve-drugs-to-counteract-nuclear-radiation-486223096

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মঙ্গলবার, ৩০ এপ্রিল, ২০১৩

Morocco accuses Algeria and Polisario of destabilizing the Sahara ...

By Youssef El Kaidi

Morocco World News

Fez, April 30, 2013

It seems that the US withdrawal of its draft resolution to expand the mandate of the MINURSO to monitor human rights in the Sahara was disillusioning and traumatic to the Polisario and Algeria. Following the adoption by the UN Security Council of the resolution on the Moroccan Sahara by consensus?the resolution that makes no mention of a human rights monitoring mechanism in the Moroccan Sahara?the separatists in the southern provinces went into riots in Laayoune and Boujdour to provoke the security forces and instigate violence.

The US withdrawal of its draft resolution, which is perceived as a political victory for Morocco, puts Algeria and Polisario in an embarrassing situation. In response to this political victory, Algeria and Polisario plan to sow the seeds of discord and anarchy in the Moroccan Sahara by ?inciting minors to engage in clashes with Moroccan security forces to promote the claim that Morocco does not respect human rights,? the mayor of Laayoune Khalil Eddakhil said in a press conference on Monday.

The mayor added that there is information indicating that a number of ?young men benefit from training in the Tindouf camps (of Polisario in the Algerian territory) and then infiltrate Morocco?s southern provinces to carry out acts of sabotage.?

The plan to drag the region into instability, of which Morocco is fully aware, is carried out by the separatists in the cities of the Moroccan Sahara. These individuals were not arrested despite the damage that they caused to public property in these cities. ?No one was arrested despite the acts of vandalism and serious damage that occurred to public property, as well as the injury of a number of members of the security forces who were pelted with stones,? says Mr. Khalil Eddakhil who also stressed that ?Morocco is committed to the policy of restraint so as to not give the opponents of its territorial integrity excuses that they later may use against it.?

? Morocco World News. All Rights Reserved. This material may not be published, rewritten or redistributed

Source: http://www.moroccoworldnews.com/2013/04/89065/morocco-accuses-algeria-and-polisario-of-destabilizing-the-sahara/

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Surviving hell in a Bangladesh factory collapse

Merina, a survivor of the garment factory building collapse, is comforted by family members in hospital on Saturday April 27, 2013 in Savar, near Dhaka, Bangladesh. Merina was trapped under rubble for three days, surviving with nothing to eat and only a few sips of water. The building collapse was the worst disaster to hit Bangladesh's $20 billion a year garment industry.(AP Photo/Gillian Wong)

Merina, a survivor of the garment factory building collapse, is comforted by family members in hospital on Saturday April 27, 2013 in Savar, near Dhaka, Bangladesh. Merina was trapped under rubble for three days, surviving with nothing to eat and only a few sips of water. The building collapse was the worst disaster to hit Bangladesh's $20 billion a year garment industry.(AP Photo/Gillian Wong)

Merina, a survivor of the garment factory building collapse, is comforted by her father in hospital on Saturday April 27, 2013 in Savar, near Dhaka, Bangladesh. Merina was trapped under rubble for three days, surviving with nothing to eat and only a few sips of water. The building collapse was the worst disaster to hit Bangladesh's $20 billion a year garment industry.(AP Photo/Gillian Wong)

Saiful Islam Nasar poses in front of the rubble of a building collapse in Savar, near Dhaka, Bangladesh Monday April 2013. Nasar, a mechanical engineer is one of hordes of volunteers who came to Savar to help with the rescue effort. They get no funding, have no training and buy their supplies themselves. They have featured largely in efforts to save those who were crushed in the worst disaster to hit Bangladesh?s $20 billion a year garment industry.(AP Photo/Ismail Ferdous)

Saiful Islam Nasar poses in front of the rubble of a building collapse in Savar, near Dhaka, Bangladesh Monday April 29, 2013. Nasar, a mechanical engineer is one of hordes of volunteers who came to Savar to help with the rescue effort. They get no funding, have no training and buy their supplies themselves. They have featured largely in efforts to save those who were crushed in the worst disaster to hit Bangladesh?s $20 billion a year garment industry. (AP Photo/Ismail Ferdous)

A worker leaves the site where a garment factory building collapsed near Dhaka, Bangladesh Monday, April 29, 2013. Rescue workers in Bangladesh gave up hopes of finding any more survivors in the remains of a building that collapsed five days ago, and began using heavy machinery on Monday to dislodge the rubble and look for bodies - mostly of workers in garment factories there. At least 381 people were killed when the illegally constructed, 8-story Rana Plaza collapsed in a heap on Wednesday morning along with thousands of workers in the five garment factories in the building. (AP Photo/Ismail Ferdous)

(AP) ? Merina was so tired. It had been three days since the garment factory where she worked had collapsed around her, three days since she'd moved more than a few inches. In that time she'd had nothing to eat and just a few sips of water. The cries for help had long since subsided. The moans of the injured had gone silent.

It was fatigue she feared the most. If sleep took her, Merina was certain she would never wake up.

"I can't fall asleep," the 21-year-old thought to herself, her face inches from a concrete slab that had once been the ceiling above her. She'd spent seven years working beneath that ceiling, sewing T-shirts and pants destined for stores from Paris to Los Angeles. She worked 14 hours a day, six days a week, with her two sisters. She made the equivalent of about $16 a week.

Now she lay on her back in the sweltering heat, worrying for her sisters and herself. And as the bodies of her former coworkers began to rot, the stench filled the darkness.

____

The eight-story, concrete-and-glass Rana Plaza was one of hundreds of similar buildings in the crowded, potholed streets of Savar, an industrial suburb of Bangladesh's capital and the center of the country's $20 billion garment industry. If Bangladesh remains one of the world's poorest nations, it is no longer a complete economic cripple. Instead, it turned its poverty to its advantage, heralding workers who make some of the world's lowest wages and attracting some of the world's leading brands.

But this same economic miracle has plunged Bangladesh into a vicious descending spiral of keeping down costs, as major retailers compete for customers who want ever cheaper clothes. It is the workers who often pay the price in terms of safety and labor conditions.

The trouble at Rana Plaza began Tuesday morning, when workers spotted long cracks in at least one of the building's concrete pillars. The trails of chipped plaster led to a chunk of concrete, about the size of a shoe box, that had broken away. The police were called. Inspectors came to check on the building, which housed shops on the lower floors and five crowded clothing factories on the upper ones.

At 10 a.m., the 3,200 garment workers were told to leave early for lunch. At 2 p.m., they were told to leave for the day. Few of the workers ? mostly migrants from desperately poor villages ? asked why. Some were told the building had unexplained electricity issues.

The best factory buildings are well-constructed and regularly inspected. The workers are trained what to do in case of an emergency.

Rana Plaza was not one of those buildings. The owner, Mohammed Sohel Rana, was a feared neighborhood political enforcer who had branched into real estate. In 2010, he was given a permit to build a five-story building on a piece of land that had once been a swamp. He built eight stories.

Rana came quickly after the crack was found. So did the police, some reporters and officials from the country's largest garment industry association.

Rana refused to close the building. "There is nothing serious," he said. The workers were told to return the next morning, as scheduled, at 8 a.m.

____

Merina, a petite woman with a round, girlish face and shoulder-length hair, never saw the crack.

She comes from Biltala, a tiny village in southwest Bangladesh, where there is electricity but little else. Her father is a landless laborer who grows rice and wheat on rented farmland, and, when he can, travels the seven hours by train to Dhaka to sell cucumbers, cauliflower and other vegetables on the street. When she was 15, she moved to Dhaka. Some of her aunts were already working in garment factories, and she quickly had a job.

For millions of Bangladeshis, the garment factories of Dhaka are a dream. Every year, at least 300,000 rural residents ? and perhaps as many as 500,000 ? migrate to the Dhaka area, already one of the most crowded cities on the planet.

Poverty remains the norm across most of rural Bangladesh, where less than 60 percent of adults are literate. To them, the steady wage of a garment factory ? even with minimum wage less than $40 a month ? is enough to start saving up for a scooter, or a dowry, or a better school for the next generation.

Merina's two sisters joined her in Savar, where women make up the vast majority of the factory workers. Here, the poor learn quickly that it is not their role to question orders. And girls learn quickly that nearly all decisions are made by men.

So for a woman like Merina, who like many Bangladeshis goes by one name, there are generations of culture telling her not to question a command to go back to work.

When some factory workers did speak up Wednesday morning, they were reminded that the end of the month ? and their paychecks ? was near. The message was clear: If you don't work, you won't get paid.

"Don't speak bullshit!" a factory manager told a 26-year-old garment worker named Sharma, she said, when she worried about going inside. "There is no problem."

____

Around 8:40 a.m. Wednesday, when the factories had been running for 40 minutes or so, the lights suddenly went off in the building. It was nothing unusual. Bangladesh's electricity network is poorly maintained and desperately overburdened. Rana Plaza, like most of the factories in the area, had its own backup generator, sometimes used dozens of times in a single day.

A jolt went through the building when the generator kicked on. Again, this was nothing unusual. Eighteen-year-old Baezid was chatting with a friend as they checked an order of short-sleeved shirts.

He'd come from the countryside with his family ? mother, father and two uncles ? just seven months earlier. Since then, he'd worked seven days a week, from 8 a.m. to midnight. His salary was about $55 a month. But he could more than double that by working so many hours, since overtime pays .37 cents an hour.

Sometime after the generator switched on ? perhaps a few moments later, perhaps a few minutes ? another, far larger, jolt shook the floor violently. The building gave a deafening groan.

The pillars fell first, and one slammed against Baezid's back. He was knocked to the floor, and found himself pinned from the waist down, unable to move.

He heard coworkers crying in the darkness. One coworker trapped nearby had a mobile phone, and the seven or eight people nearby took turns to call their families.

Baezid wept into the phone. "'Rescue me!'" he begged them.

Like a young boy, he kept thinking of his mother. He wanted to see her again.

____

In Bangladesh, people in need of help rarely think first of the police, or firefighters, or anyone else official.

Baezid called his family. So did many other people. The state is so dysfunctional here, so riven by corruption and bad pay and incompetence, that ordinary people know they have a better chance of finding help by reaching out to their families. Often, they simply call out for the help of whoever will come.

Until Monday, when there was no hope left for survivors and heavy equipment was brought in to move tons of concrete, many of the rescuers working inside the rubble were volunteers. They were garment workers, or relatives of the missing. Or, in the case of Saiful Islam Nasar, they were just a guy from a small town who heard people needed help.

Nasar, a lanky mechanical engineer from a town about 300 kilometers (185 miles) away, runs a small volunteer association. They get no funding and have no training. They buy their supplies themselves. For the most part, the group offers first aid to people who have been in car accidents. During the monsoon rains, they help whoever they can as the waters rise around the town.

When he saw the news, Nasar gathered 50 men, jumped on a train and reached Rana Plaza about 11 hours after the collapse.

He made his way into the rubble with a hammer and a hacksaw, by the light of his mobile phone. In six days, he says he has rescued six people, and helped carry out dozens of bodies.

That first night, he slept on the roof of the collapsed building. Then for two nights he slept in a field, and now he has a tent. But he can't sleep much anyway, because the images of all the corpses keep running through his head.

Told that he was a hero, he looked back silently.

Then he wept.

____

Merina was sitting at her knitting machine on the fourth floor, in the Phantom TAC factory, when the world seemed to explode.

She jumped to her feet and tried to run for the door, but pieces of the ceiling slammed down on her. She crawled in search of a place to hide, and found one: a section of the upstairs floor had crashed onto two toppled pillars, creating a small protected area. About 10 other men and women had the same idea, including Sabina, a close friend. The two women clutched hands and wept, thinking their lives would end in a concrete tomb. "We're going to die, we're going to die," they said to each other.

The group could barely move in the tiny space. Merina's yellow salwar kameez was drenched with sweat. The air was putrid with the smell of death.

As time passed, desperately thirsty survivors began drinking their own urine. One person found a fallen drum of water used for ironing and passed around what was left in a bottle cap. Merina sipped gratefully.

She kept thinking of her sisters, who shared a single bed with her in a corrugated tin-roofed room near the factory.

Her sisters, though, had been luckier.

Merina's older sister, Sharina, ran out just in time. She turned around to watch the building she had toiled in for years fold onto itself in an instant.

"I must be no longer on this earth," she thought, her hands covering her ears from the deafening boom. After a frantic search, she found 16-year-old Shewli, who had also escaped. But where was Merina? She borrowed a cell phone and called her father in their village. "I managed to escape, but Merina is still trapped," she told him.

Their parents booked tickets on the next train to Dhaka.

They arrived Thursday morning, joining hundreds of other relatives who had thronged to the scene. Merina's mother prayed hard, promising God a devotional offering ? a valuable gift from this rural family ? if Merina got out alive.

"If you save the life of my daughter, I will sacrifice a goat for you," she promised.

____

On Friday, Merina finally began to hear the sounds of rescuers cutting through the slab above her with concrete saws.

"Save us! Save us!" she and Sabina yelled together. But by the time the rescuers reached her Saturday morning, she was disoriented and barely conscious. She was put in an ambulance and people surrounded her. "Where are you taking me?" she asked them. "What happened?"

"Don't be afraid, you're going to the hospital," someone told her.

Merina was taken to the Enam Medical College Hospital, a bare-bones facility with aged, rusted beds, dirty tile floors and bare concrete walls. After everything that happened, she had emerged with just bumps on her head and a sore back from lying in the same constrained position for so long. Baezid woke up in the same hospital, relatively unhurt except for a huge bruise from the pillar, which had turned his back almost black.

At least 384 people died, and the toll is climbing. Building owner Rana has been arrested.

On Saturday, as Merina lay on her side resting, her mother stroked her hair, fed her and rubbed her back. Tears rolled down Merina's face, and she squeezed her father's hand.

That night, Merina slept fitfully, replaying the ordeal in her mind. She woke with a new conviction. "God has given me a second life," Marina said later, speaking from her hospital bed. "When I've recovered, I will return home and I will never work in a garment factory again." Baezid said the same thing: He'd never go back to the garment factories.

Many survivors, though, will return. The choices are just too few.

____

Baezid's two uncles also worked in Rana Plaza. The three went to the factories together last Wednesday.

The two uncles have not been seen since. They are presumed dead.

____

Sullivan reported from New Delhi, India.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/f70471f764144b2fab526d39972d37b3/Article_2013-04-29-Bangladesh-Destruction%20and%20Survival/id-014683e76be24fc08a64b937f4ca4c81

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