first_img More information: IEEE Explore further ( — The great thing about robots is that they come in all shapes and sizes. Of course, that is also one of the creepiest things about robots too. You never know what is going to be a robot these days. There are people shaped robots, there are robots that are designed to explore the depths of space. That bird that you see on the building. It could be a robot too. Citation: It’s a bird, it’s a plane, it’s a robot bird (w/ video) (2011, March 29) retrieved 18 August 2019 from The robot bird, who has been given the to-the-point name of SmartBird, was shown off by robotics company Festo. Festo is a robotics company that seems to enjoy making bots that are shaped like animals. They have previously created both a robotic elephants trunk that is sensitive enough to grab items, and a set of robot penguins that have learned to avoid each other. Who knows, maybe this remote controlled gull will be the spy bot of the future. One, slightly more pragmatic goal may be to co-opt the wing technology to create what are known as ‘stroke wing generators’, which can use this same motion in order to generate power from water. So, this little bird may actually be green.center_img © 2010 The SmartBird design is based on a real life bird, a herring gull, who is able to take off, with the help of an on board motor. Then the wings begin to flap. Once they get beating at the right speed, the wings begin to imitate the way that real birds fly. The front edge of the wing twists, and generates thrust, and the tail acts the same way that a rudder would, steering the bird in different directions. Toyota’s musical robots (w/ Video) This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more

first_img Journal information: Physical Review Letters (a) and (c) show numerical states in real space. (b) and (d) show examples of the analogue “magnetic states” on a torus in momentum space. Credit: Price, et al. ©2014 American Physical Society More information: Hannah M. Price, et al. “Quantum Mechanics with a Momentum-Space Artificial Magnetic Field.” Physical Review Letters. DOI: 10.1103/PhysRevLett.113.190403 ( —Normally, the strength of a magnetic field increases as you get closer to a magnet and decreases as you move further away—a concept easily understood when placing magnets near a refrigerator, for instance. But recent research has shown that exotic “momentum-space artificial magnetic fields” can be created where the strength of the magnetic field depends on how fast a particle moves, instead of where the particle is. In other words, the roles of position and momentum are swapped. Electrons moving in a magnetic field exhibit strange quantum behavior “However, what if we could find equations in terms of ‘momentum states’ that had an analogous mathematical structure? Then we could draw an analogy with magnetism: we would get the same quantum physics but where the ‘position’ must be swapped everywhere with the ‘momentum.'”The equations could be understood as describing a particle in an ‘artificial momentum-space magnetic field.'”As has been previously shown by other physicists, it turns out that momentum-space magnetic fields are indeed real. They occur when energy bands with Berry curvature are created, and a weak additional external potential is added. “A key message in our paper is to say, ok you have found this quantum equation with a’momentum-space magnetic field,’ so why don’t you solve it to look at the quantum dynamics of a particle?” Price explained. “You have all the ingredients that you need to study the quantum physics of a particle in a magnetic field (because the mathematical structure is the same), but now with position and momentum swapped. In this way, we will go from this complicated system that physicists find hard to understand (the geometrical energy bands with an additional potential) to one that we find easy to understand (magnetism).”While scientists have previously made a similar point about the semiclassical physics, this is the first time that it has been understood in general about the quantum physics. “One of our main contributions is to say that experimentalists can use this analogy to study magnetism in new ways,” Price said. “Momentum space can sometimes be very different than real space, as, for some systems, momentum space is like a torus or a doughnut. Then if you increase your momentum enough, eventually you will end up in the same momentum state that you began in. So now when we study our equations, the analogy is with a particle in an artificial magnetic field in momentum space on a torus. The quantum physics of a particle in a magnetic field on a torus has never been studied experimentally before in any context (but it has been studied theoretically), and we propose exactly how it could be done in current experiments by exploiting a momentum space magnetic field.”To experimentally demonstrate these concepts, the scientists propose to use ultracold gases, as a weak harmonic trap could be added with laser beams or magnetic fields. Experimentally, it won’t be easily possible to switch the momentum-space magnetic field on and off. However, by switching the harmonic trap on and off, physicists will still be able to study the system. The scientists explain that, in the analogy with magnetism, this is like changing the particle’s mass, where no harmonic trap is like having an infinitely large mass. When a particle is infinitely heavy, it won’t have any kinetic energy in momentum space, meaning it won’t be able to move in momentum space. Since magnetic fields affect a particle as it moves, if it has an “infinite mass” in this analogy, the particle won’t feel the momentum-space magnetic field. “Our work is about exploring old answers to new questions, to the benefit of both the old and new research field,” Price said. “Scientists know a lot about magnetism and have been studying the quantum physics of a particle in a magnetic field for decades; it’s often considered textbook physics. However, scientists are still learning a lot about geometrical energy bands with additional potentials. In particular, this is a really new and important field in ultracold gases and photonics where there are many relevant recent experiments, all at the cutting-edge. We’re talking to that community, and hopefully showing them that they will be able to study and understand much more than they might expect. We want to emphasize that there are lots of interesting connections with magnetism that can be revealed by studying the quantum physics of single particles.”We are currently working on demonstrating how other experiments [besides realizing magnetism on a torus] would be able to study other analogue quantum magnetic phenomena in momentum space. There are many more possibilities still to be explored.” Now in a new paper, physicists have explored these ideas further, especially at the quantum level. They show how current experiments can be modified to study the motion of a quantum particle in a momentum-space magnetic field. They explain that these systems will be able to experimentally realize a “wonderland of new physics,” such as magnetism on a torus, for the first time.The physicists, Hannah M. Price, Tomoki Ozawa, and Iacopo Carusotto at the INO-CNR BEC Center and the University of Trento, Italy, have published their paper discussing momentum-space magnetism in a recent issue of Physical Review Letters.”Magnetism is fundamental in many areas of physics, and it leads to many fascinating phenomena,” Price told “Physicists use mathematical equations to capture the behavior of a quantum particle in a magnetic field. These equations have a particular, beautiful mathematical structure. But we can also reverse this logic. If we engineer or find an equation with this particular mathematical structure, the behavior of a particle will be like that of a particle in an ‘artificial magnetic field,’ even if the ‘field’ has a completely different underlying physical origin. As has been known for a long time, this beautiful mathematical structure can be found or created in many different physical contexts. This is a really powerful tool that physicists use to engineer and learn more about magnetism.”As the scientists explain, one of the ideas that physicists use a lot in quantum mechanics is the deep connection between the position and momentum of a particle. “We can either view our problem in terms of all the possible ‘position states’ of a particle or equally in terms of all the possible ‘momentum states,'” Price explained. “Depending on the viewpoint we choose, our mathematical equations will have a different form, and so we usually choose the viewpoint that gives us the easiest equations to solve and understand. The beautiful mathematical structure described above appears when we have a magnetic field and we look at our equations in terms of ‘position states.’ Citation: Physicists study magnetism with the roles of position and momentum reversed (2014, November 20) retrieved 18 August 2019 from This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Explore further © 2014 Phys.orglast_img read more

first_imgA comparison of university rankings in physics, as determined by the credit allocation method (CAM) and two other methods: Shen’s method and the Total Citations (TC) method. Credit: Wang et al. ©2017 EPL Journal information: Europhysics Letters (EPL) (—Assessing and ranking research institutes is important for awarding grants, recruiting employees, promoting institutes, and other reasons. But finding a fair and accurate method for assessing the performance of research institutes is challenging due to the many factors involved, such as the number of published papers and citations, the unreliability of some citations, and the fact that many papers have multiple authors from different institutes with unequal contributions. In a new study published in EPL, a team of scientists from China whose members study complex systems, data science, and physics has developed a new approach called the credit allocation method (CAM) for ranking research institutes that accounts for all of these factors by using many thousands of directed networks. “Different from other metrics based on citations, our work considers the citation network structure and provides one way to rank the credit for research institutes for different research fields from the viewpoint of academic reputation,” coauthor Jian-Guo Liu, at the University of Shanghai for Science and Technology, the Shanghai University of Finance and Economics, and the University of Fribourg in Switzerland, told basic idea is that each directed network consists of one randomly chosen paper that is linked to all of the papers that have cited that paper. Then each of these citing papers is linked to all of the other papers that it cites, as long as those papers have at least one author from one of the same research institutes as the original paper. By using a formula that accounts for the order of each research institute (those listed first in the paper receive more credit than those listed later), the researchers computed the credit allocated to each research institute due to the original paper. After repeating this process for nearly half a million papers in the field of physics, with authors from approximately 19,000 research institutes, the researchers considered another problem that makes the assessment of research institutes difficult: the citation data is often unreliable. The researchers refer to a recent study that found that more than 30% of research papers had at least one incorrect citation, and that 10% of all citations were incorrect, meaning the papers cited did not clearly support the statements they were meant to support. To address this problem, the researchers randomly rewired some of the citation links in the networks, creating an artificial disturbance intended to model the inaccuracies in the citation data. In the final rankings, many of the top-ranked physics research institutes identified by the new method corresponded to institutes with high reputations. The top four overall were the University of California, Bell Labs, the Max Planck Institute, and MIT. The top four in China were the University of Science and Technology of China, Nanjing University, Peking University, and Tsinghua University.Although the researchers showed that the new method outperforms other methods of assessing research institutes, they note that it has some shortcomings. In particular, it does not account for the fact that older papers tend to have more citations than newer papers, so research institutes with longer histories tend to be ranked higher. The researchers plan to address this detail in the future by accounting for the age of the institution.”In future work, we also plan to investigate the citation networks of some specific research fields, such as management science, complexity, statistical physics, and computer science, in order to rank the research institute credit of these fields,” Liu said. “We also plan to develop a website to publish the ranking results for researchers all over the world.” Assessing scientific research by ‘citation wake’ detects Nobel laureates’ papers © 2017 Phys.orglast_img read more

first_imgMy parents fight over everything. I’m in 8th standard and feel like running away at times. Is there something I can do to sort it out?Neha, HaryanaWhy don’t you express your mind to your parents? May be you can write a letter or mail them. I can understand how difficult it is. But, you have to stay put till you grow up and move out. Tell them exactly the pain, the agony and explain clearly. Sometimes we are blind and have to be told directly. Wish you good luck dear! Also Read – ‘Playing Jojo was emotionally exhausting’My uncle (my father’s brother-in-law) has a habit of touching me at every opportunity. He tries to be over friendly and cracks sleazy jokes! This truly irritates me! How can I stop him?Devika, New DelhiTell him – STOP! If politeness doesn’t work, be rude and be firm. Whenever possible, avoid him completely. Just vanish when he’s around. Otherwise, just warn him that you will tell your family about his acts. This should be sufficient for him to understand and behave sanely. Also Read – Leslie doing new comedy special with NetflixMy husband gets violent during sex. We are married for 5 months and he has hit me a number of times, he bites and I have bruises all over. He says he finds pleasure that way. Is this normal?Name withheld, New DelhiHe believes in masochism — deriving sexual gratification from being physically or emotionally abusive. Your husband is a sadist too! Well, many couples do enjoy this kind of a sexual fantasy. But, it seems you are not comfortable at all. I suggest, you be firm and tell your husband that you don’t like it. Hope he understands you soon and making love becomes enjoyable for you. My son is 19 years old. I have got to know from his friend that he’s involved in a relation with a 36-year-old divorced woman. We are shattered! Please advise!Mrs. Mehta, NoidaPlease have a friendly chat with him. Not as a mother but as a friend. Understand his reasons for being involved with someone who is that many years older and a divorcee as well. The relationship that the two share could be pure friendship and may be you are reading too deep into it. Most of the times what we hear is half or no truth. Don’t worry too much yet, be there with him. He surely needs a good companion and sometimes sheer loneliness make us walk lanes that we otherwise would have avoided.My wife is too religious. Almost 15 days a month she sleeps separately and gives the excuse of her ‘guru’ for not having sex with me! We are married for two years and this is affecting my sex life badly. What to do?Animesh, ManaliThis is really sad! Just tell your wife that her guru and she are forcing you to look for fun outside marriage! She needs to understand you and maybe she is not realising what she is losing by being unreasonably ‘religious’! No woman would want her husband to look for physical pleasure outside, hence I hope she will change her life to accommodate your happiness as well.Have a love or life query you cannot find an answer to? Send your questions to – [email protected]last_img read more

first_imgThe 6th Golden Kela Award held on 29 March, awarded all the worst bollywood performance of 2013 based upon votes. Abhishek Sharma, director of Tere Bin Laden Part 2 who was present there to recieve his last year’s Golden Kela presented the most prestigous award of the evening, the Baawra Ho Gaya Ke award to the perfectionist Aamir Khan for Dhoom 3 for portraying larger than life stunts in the movie.Sajid Khan’s Himmatwala won the Golden Kela for the worst movie award. Ajay Devgan and Sonakshi Sinha managed to take home the Kelas for second time in a row for being the worst actor(male and female) for their acting skills shown in Himmatwala and R..Rajkumar respectively. Also Read – ‘Playing Jojo was emotionally exhausting’ Sanjay Leela Bhansali was titled with worst director award for his superhit movie, Goliyon ki Rasleela…Ram Leela. The honour for the worst actor in supporting role (male) went to Aditya Roy Kapoor for Yeh Jawaani Hai Deewani and in the female category it was Deepika, Jacqueline and Amisha (Race 2) bagging the honours for their histrionics. Contributing to the most atrocious lyrics, Sameer for Raghupati Raghav from Krrish 3 earned the Golden Kela where the most irritating song title was given to Party All Night from Boss. Also Read – Leslie doing new comedy special with NetflixA number of special awards were also presented like the Dara Singh Award for the Worst Accent  which was won by Deepika Padukone for Chennai Express, Aakhir Kyun Award to  Priyanka Chopra for trying to look cool in her music video Exotic, Rajshri Award for Most Regressive Film of the Year  went to Ranjhanaa, Why Are You Still Trying Award to Shahid Kapoor for R…Rajkumar, and Aap Yahaan Aaye Kisliye Award to Uday Chopra with a special tribute to his career that never started.Apart from this, some of the last years’ movie also managed to bag home the Anti Kela Awards like Saheb Biwi aur Gangster 2, Go Goa Gone, The Lunchbox and Shahid for actually making sense and giving the movies audience some respite.last_img read more

first_imgKolkata: About 12 kg of smuggled gold valued at Rs 3.7 crore was seized in two separate operations and seven persons were arrested, an official said on Monday. Acting on a tip off, personnel of the Directorate of Revenue Intelligence intercepted three persons at Burrabazar, one of Asia’s biggest wholesale markets, in central Kolkata and recovered 53 gold biscuits having a foreign marking, weighing 6.18 kg and valued at 1.68 crore. “Gold biscuits were hidden in the shoes,” the official said. The gold biscuits were smuggled into India from Bangladesh through Bangaon, an Indo-Bangladesh border town in North 24 Parganas. The men were in a car. “Three persons and the driver of the car have been arrested,” a DRI official said. Also Read – Heavy rain hits traffic, flightsThree of the accused have been remanded to judicial custody for 14 days. In another case, one person was apprehended from a bus plying between Kolkata and Khulna (Bangladesh) at Kaikhali in North 24 Parganas by DRI officials. The driver and the supervisor of the bus were also arrested for smuggling the gold from Bangladesh. A total of 5.55 kg of gold of foreign origin, valued at Rs 1.75 crore, was recovered from the person’s shoe and a belt tied around his waist, a DRI official said.last_img read more

first_imgRubikirat Vohra, a well-known artist who has been critically acclaimed for her work who will be exhibiting her work in the Capitals’ Triveni Kala Sangam. A display of her latest works of art is to be held on the January 12 titled Metamorphosis of Power.Rubkirat’s Art displays the dichotomy of a human mind magnificently. Her art demonstrates a philosophical bent of mind coming from an awareness of resignation, reconciliation and resilience. She skillfully displays a strong communiqué by using architectural ‘spaces’, mechanical tools and shadowy and headless figures who act as protagonists.  Also Read – ‘Playing Jojo was emotionally exhausting’Standing before her works, the viewer might get a feeling of a workshop like aura where ‘inner work’ is in process vibrating with the fundamental philosophical meditations and mediations. As an Artist it shows her effort to deal with the theatre of life. There is an intense silence resonating from her works one that showcases a seeker in close proximity to its solution. Rubkirat’s works, in general celebrate this metamorphosis of organic human beings into full-blown individuals.When:  January 12Where: Triveni Kala Sangam, Near Bengali Marketlast_img read more

first_imgFor any theatre actor, a solo act is the ultimate test that pushes his creative and acting skills to a limit where he transforms into a seasoned performer. And, when a solo act involves the protagonist donning 10 different hats, it is bound to offer an inescapable and exciting challenge.This is what Mumbai-based theatre actor Deepal Doshi would be doing in the capital this weekend when he would perform A Tale of Two Treaties, produced by Behroopiya Entertainers, at Alliance Francaise in south Delhi. This 75-minute act uses the 16th century Commedia Dell’Arte Italian theatre form that involves improvised performances, but unlike the original, which involves an ensemble, the 33-year-old chose to infuse fresh elements by making it a solo performance. Also Read – ‘Playing Jojo was emotionally exhausting’“I wanted to teach this form of theatre in India, but I didn’t want to do it in a mundane manner. I decided to do something that was challenging and experimental. So I came up with the idea of doing the entire act solo,” Doshi, who is in the capital, told.Doshi obtained a diploma in Grotowsky-based physical theatre from Vardinge in Sweden and a Master of Fine Arts from the Dell’Arte International School Of Physical Theatre in Blue Lake, California. He then collaborated with  a Swedish director and conceptualised this play, without any script in hand. The play is now directed by his wife Kathryn Doshi and has travelled to Sweden and the US, as also to Bali. It was first performed in Mumbai in 2010. Doshi pointed out that “the script evolved on its own and so does my performance, which I improvise on after every performance”. Also Read – Leslie doing new comedy special with NetflixInterestingly, the basic plot of the play is simple: It’s is a love story where a girl and boy fall in love, their families oppose this and after a lot of melodrama, they unite. “It is a happily-ever-after story,” said Doshi, adding the storyline is influenced by the basic Commedia formant which focus more on how the story shapes up and not on what the story is all about. For Doshi, performing this act has been an enriching experience as he uses the physical art of transformation through masks.“The ability of an actor to transcend into so many actors is the biggest challenge. But that is what drives an artist – challenge,” said Doshi. “I believe failing is the breeding ground for creativity,” he added.Explaining how situations can become tricky, yet pose a challenge when he has to fit into the shoes of several characters, Doshi said, “In the last scene of the play, 4 people are having an argument, so I have to completely absorb myself into each of them and enact their personalities through the body language.”The play will be staged on April 18 and 19.last_img read more