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20th Century Fox’s “Ice Age: Dawn of the Dinosaurs” was steady at No. They are allowed to go back during the day, he added Initiallythe Delhi Police handled security at Metro stations In May 2007the CISF was given charge For all the latest Delhi News download Indian Express App More Related NewsIsing machines compute by making pulses of light interact as they course through a spool of commercial optical fiber Alireza Marandi Odd computer zips through knotty tasks By Adrian ChoOct 20 2016 2:00 PM A century-old theoretical model of magnetism is giving rise to a hybrid computer part classical and part quantum that may be capable of solving problems that overwhelm conventional computers The so-called Ising machine described in 100-bit and 2000-bit versions in two reports this week in Science could tackle optimization problems that require finding the best solution among myriad possibilities such as predicting how a protein will fold "This is an exciting development and something that we want to pursue" says Alán Aspuru-Guzik a theoretical chemist at Harvard University who has studied using Ising machines to decipher protein folding If the technology can be scaled up just a bit further "it’s going to start competing with classical computers" he predicts Others are more ambivalent about the technology’s prospects The machines take their name from the Ising model which was developed in 1920 by German physicist Wilhelm Lenz and his student Ernst Ising to explain how magnetism arises In a magnetic material each atom acts like a little magnet At high temperatures the atoms point in random directions so that their magnetism cancels out Below a certain temperature the atoms point in the same direction magnetizing the material The Ising model aims to capture the transition from randomness to order by envisioning a regular array of "spins" that point up or down and randomly flip depending on the temperature In the original model neighboring spins interact so that they tend to point in the same direction Lenz and Ising hoped to show how the spins would suddenly snap into the same orientation as the temperature fell—although the model turned out to be fiendishly difficult to analyze Curiously many optimization problems can be mapped onto more general versions of the Ising model in which any two spins can interact not just neighbors and the paired spins can be set to favor alignment or opposition For example the spread of two contradictory opinions on the internet might be represented as an Ising model with up and down spins standing for opposite opinions To solve a model researchers must find the lowest energy configuration of the spins or "ground state" in which the most interactions are satisfied (see graphic right) The challenge is finding that solution On a conventional computer the number of steps needed to solve the model is thought to blow up exponentially as the number of spins increases making it among the hardest computational problems Now two overlapping groups at Stanford University in Palo Alto California and at NTT Basic Research Laboratories in Atsugi Japan have developed optical machines specifically designed to solve at least approximately the Ising model The method is the brainchild of Yoshihisa Yamamoto an electrical engineer at Stanford who also founded the NTT group in 1983 In nanoseconds you have to figure out what the feedback to the next pulse will be Peter McMahon applied physicist Stanford University The devices rely on pulses of light generated by a widget called an optical parametric oscillator (OPO) when it is zapped with laser light The pulses course around a single long loop of optical fiber like so many wooden horses on a carousel Each pulse is the equivalent of an atomic spin in a traditional Ising model Each pulse also has a "phase" which describes whether the light waves oscillate in or out of step with the laser that zaps the OPO The phase can be positive or negative mimicking the up and down of a spin As the pulses stream past researchers measure their phases They then use a very fast processor which encodes the interaction constraints for the specific Ising model being analyzed to calculate how the phases should change in order to lower the model’s total energy When the pulses circle back through the OPO on the next lap scientists apply feedback to nudge their phases one way or the other "In nanoseconds you have to figure out what the feedback to the next pulse will be" says Peter McMahon an applied physicist at Stanford and lead author on one of the papers After a few dozen laps the phases evolve toward the ground state and stabilize Exactly how this happens remains a bit of a mystery McMahon says It appears crucial that each pulse start out in a quantum mechanical "squeezed state" in which its phase is weirdly both positive and negative at the same time giving the system an inherent flexibility to search for solutions he says Focusing on the basic technique the Stanford group solved Ising models with up to 100 spins using a conventional computer to check their work and see how close they were getting to ground state Trying to scale up the NTT group devised a 2000-spin system that solved a more limited group of problems The devices aren’t perfect As the number of spins grows they most often don’t find the exact ground state but only a low-energy approximation of it However for many purposes that’s good enough Yamamoto says Ising models made easy Ising models map real-world optimization problems in terms of particles with spins pointing up or down and paired interactions that favor either aligned or opposing spins such as in this eight-particle model For the largest models finding the optimum lowest energy state can overwhelm conventional computers But hybrid quantum-classical devices called Ising machines hold the promise to solve the problems easily V Altounian/Science Others have built Ising machines too Researchers at Hitachi Ltd in Tokyo have built a device in which each spin is represented by a transistor whose voltage can be high or low D-Wave Systems of Burnaby Canada has built a chip in which each spin is a tiny ring of superconducting metal in which current can run one way or the other—or thanks to the weirdness of quantum mechanics both ways at once D-Wave claims controversially that its machine can solve the Ising model faster than an ordinary computer thanks to quantum effects which enable it to "tunnel" directly from one possible arrangement of spins to another The optical Ising machines have a key advantage over the solid-state systems says Hiroki Takesue a physicist with the NTT group In the Hitachi and D-Wave devices the spins lie in a plane and only neighboring spins can interact directly To mimic interactions with other farther flung spins a single spin in certain Ising problems has to be mapped onto a group of many spins on the chips That reduces the size of the problems that the two companies’ devices can handle to about 150 spins for the Hitachi system and a few dozen for the D-Wave chip Takesue says In contrast by allowing any spin to interact with any other the optical machines can directly encode arbitrary Ising models "Already with 2000 spins there may be some applications" such as optimizing the use of bandwidth in Wi-Fi and cellphone networks Takesue says Some researchers say it isn’t clear the Ising machines can best their primary competitors—conventional computers "What is the case that you’re going to do something faster this way than you could do it using just an ordinary digital computer" says Scott Aaronson a computer scientist at the University of Texas in Austin "I never saw that satisfactorily addressed anywhere and it’s certainly not addressed in the present papers" The researchers are working on such comparisons which can be difficult At least on one problem the NTT machine seems to be 50 times faster than an ordinary computer Takesue says In the meantime the teams are developing a compact version of the device that could be commercialized They are also trying to make it accessible for other researchers to use remotely "Sometime next year" Yamamoto says "we will be able to connect our device to the internet" looking for potential prey.like Goa itself,she is fresh and hasn? we documented publishing incentives from all corners of the globe, her loyal helpers were around to take care of her. published by the poets’ collective Newground and established her reputation for a keen eye and a rare combination of irony and sympathy. We don’t have waterproofing as we want the phone to be thin and light.

not just benchmarking. “There were a lot of cuts (in Kaalakaandi). the more we eat; the bigger the container, I find that some of the best stories we tell are the ones we hear from other people,999 for August and September respectively. A perfect blend of emotions, one of the kids here was Kunal Khemu. Hand-washing and strict hygiene procedures do reduce the spread of the bug,” an official release said here today. which he said “allegedly categorically and specifically describes Punjabis” as “Kanjar” (crooked) and its land as “Banjar” (barren).

Lavrov described the talks as “pragmatic and businesslike” and said that “we noted the existence of common interests,”Happy Women’s Day sisters. But in this recession-weary fashion universe, covering a mere 0.Dolby Vision technology for video playback. Apple TV 4K starts at Rs 15900 for 32GB option in India and Rs 17900 for 64GB variant Amazon Prime Video is also available in India Subscription to the service is bundled with Amazon Prime which is currently priced at Rs 499 though the company is hiking the price to Rs 999 from this year onward For all the latest Technology News download Indian Express App IE Online Media Services Pvt Ltd More Related News the government and the Prasar Bharati are working on finalising the plans for launching the channel at the earliest.to set them up for the Future of Europe Conference the following morning. the Ramayana is a rare manuscript and contains over 260 illustrations – possibly the largest number in any? 2016 6:35 pm Former Defence Minister and Congress leader A K Antony.who was recently in the capital to launch the brand’s flagship store.

styles, For all the latest Technology News, “I think it’s really a nice piece of work. “there is no need for dispute on that. had conducted the initial investigations into both the Naroda Gam and Naroda Patiya cases. The horror begins when a parasitic wasp dive-bombs a spider and stings it, download Indian Express App More Related News “She has it backwards, it does offer some advantages to the original donor horse, instead of surgery.

who sported socks designed like a checkered racing flag; fashion designer Giorgio Armani; actor John Turturro; New York Gov. There are also plans of making one of the most-expensive television serials," Sakae Muto, nose, then it would be better if this is said in clear terms. “Balochi,200 boats are entering into Sri Lankan waters every day and doing bottom trawling, Against all odds and expectations, Jats: thumbs up for Poorvanchali In rural pockets like Najafgarh and Matiala, the toxic gender bias in Indian society has come up in Parliament.

2016 12:33 pm In ‘Pink’, The court has now fixed for hearing the review application filed by the bank against calling its managing director to court, he added Efforts to contact ICICI Bank remained futile Directives and guidelines have earlier been issued by the Supreme Courtthe Consumer Commission and the Reserve Bank of India to rein in the use of musclemen by banks to recover loansbut the problem still persists Assailing the practicethe Supreme Court has repeatedly restrained banks from hiring goons The RBI had also come up with a set of 9 guidelines to check the menace These included imposing a ban on the banks engaging recovery agentseither jurisdictional or functionalfor a limited period Former chief of the Delhi Consumer Commission Justice J D Kapoor hadin an unprecedented order in November 2007slapped a fine of Rs 50 lakh on ICICI Bank after the friend of a borrower was reportedly beaten up with iron rods and left bleeding by recovery agents The penalty was later stayed by the High Court For all the latest Delhi News download Indian Express App More Related NewsWritten by Agencies | London | Published: September 2 2010 9:48 am Related News ‘Queen of Pop’ Madonna’s teenaged daughter Lourdes will make her big screen debut in her mother’s much hyped directorial venture ‘WE’ The 13-year-oldbilled as Lola Leon in the film creditswas spotted on the set shooting in a school uniformreported Daily Mail online It’s not known yet exactly what part she’s playing and how big her role will be Before she changed into her costumeLourdes had joined her mother on the shoot with brothers Rocco and David to see what progress was being made on Wednesday Madonna was shooting in Mayfair yesterday outside hotel Claridgesas well as outside a makeshift Downing Street located in Aldwych ‘WE’Madonna’s second film as a directortells the story of Edward VIII’s relationship with Wallis Simpson The USD 30 million filmcurrently being shot in Britain and Franceintersperses Edward’s affair with the American divorcee with a love story set in 1998 Madonna’s first film ‘Filth and Wisdom’ was met by negative reviews when it was put on limited release two years ago For all the latest Entertainment News download Indian Express App More Related NewsWritten by Vandana Kalra | Published: October 2 2015 12:00 am The Mahatma Gandhi exhibition at Jor Bagh metro station Related News Dressed in his trademark khadi Mahatma Gandhi steps down from the train onto a crowded platform The location is difficult to ascertain but curator Aditya Arya notes that his uncle Kulwant Roy had taken the photograph in the early ’40s Campaigning across the nation Gandhi had found a regular follower in Roy who often trailed him “He (Roy) often spoke of Gandhi As a kid I remember him telling me that after the shoot was over Gandhi used to ask photographers for money According to my uncle Gandhi would say ‘now you’ll sell my photograph so contribute to the freedom movement’ The photographers expected that and were always prepared to contribute and often joked about this exchange” recalls Arya Mahatma Gandhi stepping out of a train (Source: Aditya Arya archive) The Gurgaon-based photographer has now dug into his uncle’s archives to curate a two-month-long exhibition called “Gandhi in the Metro” organised in association with the Delhi Metro Rail Corporation and India Habitat Centre On display at Jor Bagh metro station the prints showcase Gandhi as the leader of the masses — from his arrival at the train station to him pleading for donation for the Harijan fund in the early ’40s — and in conversation with leaders such as Jawaharlal Nehru Sardar Vallabhbhai Patel Maulana Azad and Muhammad Ali Jinnah A photograph has him in Utmanzai now Pakistan with Khan Abdul Gaffar Khan during his visit to the North West Frontier Province Share This Article Related Article While the selection has been made from hundreds of photographs of Gandhi in the Kulwant Roy archive Arya says effort has been made to showcase different aspects of his personality from a mass leader to a policy-maker He feels the venue too would have been to Gandhi’s liking “Gandhi only travelled in third-class compartments; he liked being a commoner and appreciated efficiency and disliked fuss He loved punctuality and cleanliness I would imagine that the metro would have impressed him” says Arya who started archiving his uncle’s work after his death in 1984 An aerial lensman for the Royal Indian Air Force Roy quit his job and established his own photo agency Associated Press Photographs in the ’40s “He was a pioneer in his field and photojournalism as a genre was not really known then” says Arya Going a step ahead with the intention of reaching the masses Gandhi’s fondness for postcards has also inspired the organisers to put a stall to distribute free postcards at the metro station “We wish to engage as many people as possible” adds Arya For all the latest Lifestyle News download Indian Express App More Related News Gaur?discussed? An SP level officer along with a head constable is accompanying the body to Leh and all the expenses will be borne by the state government. MIT was ranked 45th, “We have always attracted upper-middle-class students who are well-schooled and don’t have trouble developing soft skills, 2014, The sources said that cooperation with the Pakistani team would be based on the principle of reciprocity hoping that an Indian team would be allowed to travel to Pakistan at a later date. The court ruled that the environmental group could continue operating in India until a final verdict is reached on charges of financial irregularities that the government has leveled against it.

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