yearNew Delhi, Mar 10 (PTI) India will launch 25 foreign satellites belonging to seven countries, with the USA topping the list in 2016-17, Rajya Sabha was informed today.In written response to a question, Jitendra Singh, Minister of State in Prime Ministers Office (PMO) which looks after the Department of Space, said till date 57 foreign satellites from 21 countries have been launched using the Polar Satellite Launch Vehicle (PSLV).He said Antrix – the commercial arm of ISRO – has signed agreements with Algeria and Canada for launching three satellites each, four for Germany, one each for Japan and Malaysia and 12 for the USA in 2016-17.In the last three years, from January 2013 till December 2015, ISRO launched 28 foreign satellites belonging to 13 countries, with Singapore, the United Kingdom and the USA topping the list. ISRO earned 80 million euros for the launch. PTI PR AAR SK AAR
ceremonyBy Philem Dipak SinghLondon, Aug 6 (PTI) Newly-crowned world 100m champion Justin Gatlin was today booed by the crowd at the Olympic stadium here once again, just hours after athletics world governing body chief Sebastian Coe said that the American should have been banned for life for a 2006 dope offence.The 35-year-old Gatlin, who has served two suspensions for doping offences, ruined retiring Usain Bolts fairytale farewell yesterday by beating the Jamaican sprint superstar in a highly anticipated 100m dash final.Bolt, who is expected to be a part of Jamaican title defence in mens 4x100m relay on August 12, came third, behind Gatlin and another American Christian Coleman.Stunned to see their favourite Bolt losing the race, the crowd booed Gatlin while chanting Usain Bolt! Usain Bolt!. Gatlin was simply cold-shouldered by the London crowd and the American had responded with a keep quiet gesture by putting his index finger on his lips.Today, during the victory ceremony held just before the afternoon session, Gatlin was booed again by the crowd.When bronze winner Bolts name was announced, the crowd responded with loud cheers. But as soon as the announcer in French began took Gatlins name, the crowd booed him. It was not a prolonged boo though as some sections of the crowd began to clap in acknowledgement of Gatlins victory.Gatlin took the boos on his chin as he stood stoically on the podium without showing any emotions.He called up Bolt and silver winner American compatriot Christain Coleman on the top podium to pose together for the shutterbugs.advertisementInterestingly, IAAF President Coe gave away the medals to Gatlin, Coleman and Bolt as it is customary for the global body chief to do the honours of the blue-riband event of the championships.Coe shook hands with Gatlin before honouring the newly- crowned champion with the gold medal, just as he did with Coleman and Bolt.Just a few hours back, Coe had said that Gatlin should have been handed a lengthier eight-year ban for his second dope offence in 2006 and that could have ended his career.”There have been two bans (on Gatlin) in the past. One got watered down, which made it very difficult for the second ban. The second ban, we went for an eight-year ban, which would have, in essence, been a life ban. We lost that,” Coe was quoted as saying by BBC Sport.Gatlin received a two-year ban in 2001 after failing a dope test for amphetamines found in prescribed medication he had been taking since a child for Attention Deficit Disorder. This suspension was later reduced to one year on appeal.The sprinter then tested positive for testosterone in 2006 and was suspended for eight years, avoiding a lifetime ban in exchange for his cooperation with the doping authorities.This ban, however, was also halved by an arbitration panel in 2007.”I would like (to see lifetime bans) and so would the majority of our sport. Im not going to close the door on lifetime bans but weve constantly tried it and lost it,” Coe, himself a double Olympic gold medallist in 1500m race, said.Talking about Bolt not being able to defend 100m gold in his final individual race, Coe said, “Im not eulogistic that someone who has served two bans has walked off with one of our glittering prizes. But he is eligible to be here.””Its not the perfect script. I thought Usain was very generous with the observations he made. That must have been a bitter event for him to swallow. He was bigger than the moment and it typifies his career,” the Briton said, referring to Gatlins claim that Bolt himself told him that he did not deserved to be booed.Coe, however, maintained that since Gatlin was eligble to run, he will have to be given some respect.”Gatlin is eligible to compete. Its not the most exciting day in prospect for me (to give away the gold mefal to Gatlin) but he has to be accorded some respect,” said Coe. PTI PDS ASK ASK
Related Items: Facebook Twitter Google+LinkedInPinterestWhatsApp#Bahamas, November 29, 2017 – Grand Bahama –FEMALE POWER PANEL – In recognition of National Women’s Week 2017, November 26 to December 9, President of the Senate, Senator the Hon. Kay Forbes-Smith created, and was moderator of ‘Girl Con 2017’ forum which took place Tuesday morning, November 28, at the studios of Keen I Media in Freeport, Grand Bahama. The forum was designed to convey encouragement and direction to young girls.It boasted a panel of women who have been successful in their respective careers offering advice and answers to questions posed by the girls in attendance. The panel included (from left) Senator the Hon. Jasmin Dareus; Reverend Marie Roach-Hepburn, assistant priest at Pro Cathedral of Christ the King; Eldri Ferguson, vice-president of BTC (Northern Region); Gea Pierre, playwright; and Lyndah Wells, photographer.ESSAY WINNERS – Celebrating National Women’s Week 2017, an essay on the achievement of Bahamian women was held among girls from schools throughout Grand Bahama. Winners of the essay competition were announced during ‘Girl Con 2017’ on Tuesday, November 28, 2017. Winner of the competition was Lauren Ritchie, of Lucayan International School (3rd from left); Second place, Nichana Miller of Lucayan International School (2nd from left); and third place, Beyonzca Fredrick of Eight Mile Rock High School (3rd from right).Making the presentation of gifts were Yvonne Ward, Ministry of Education District Education Officer (left); Allison Levarity of Aliv (second right) and Senator the Hon. Kay Forbes-Smith, Senate President and organizer of ‘Girl Con 2017.’(BIS Photo/Lisa Davis) Facebook Twitter Google+LinkedInPinterestWhatsApp
Copyright 2010 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. More information: G. Goldstein, et al. “Environment-Assisted Precision Measurement.” Physical Review Letters 106, 140502 (2011). DOI:10.1103/PhysRevLett.106.140502AbstractWe describe a method to enhance the sensitivity of precision measurements that takes advantage of the environment of a quantum sensor to amplify the response of the sensor to weak external perturbations. An individual qubit is used to sense the dynamics of surrounding ancillary qubits, which are in turn affected by the external field to be measured. The resulting sensitivity enhancement is determined by the number of ancillas that are coupled strongly to the sensor qubit; it does not depend on the exact values of the coupling strengths and is resilient to many forms of decoherence. The method achieves nearly Heisenberg-limited precision measurement, using a novel class of entangled states. We discuss specific applications to improve clock sensitivity using trapped ions and magnetic sensing based on electronic spins in diamond. The researchers, Garry Goldstein from Harvard University, along with coauthors from Harvard, MIT, Copenhagen University, and the California Institute of Technology, have published their study called “Environment-Assisted Precision Measurement” in a recent issue of Physical Review Letters. In their study, the scientists first describe an idealized case, and then demonstrate that it works in two different cases: quantum clocks with trapped ions and spin-based magnetometry.“We realized that part of the environment can be used to increase sensitivity,” coauthor Paola Cappellaro of MIT told PhysOrg.com. “We found that entangled states, other than the ones usually proposed for metrology (GHZ states, squeezed states) can improve the sensitivity while being more robust to decoherence.”As the scientists explain, a quantum sensor can be constructed with a central spin coupled to a bath of dark spins, which are part of the environment. All of these spins act as qubits, each having a state of 0, 1, or a superposition of both. While the central spin can be controlled and read out, the dark spins can only be collectively controlled and not directly detected. Also, the central spin and the dark spins can be coupled, and this coupling can be effectively turned on and off at will.The central spin can indirectly measure the external field, such as a magnetic field, by sensing the dynamics of the surrounding dark spins, which are in turn affected by the external field. To do this, the researchers first entangled the central spin to the dark spins, and then used this entangled state to sense the external field. As the entangled dark spins evolve, they acquire a phase that depends on the state of the central spin. Then, the researchers could flip the central spin and read out its signal. By reading this signal, the researchers could measure the phase difference between the states of the dark spins, which provides a measurement of the external field.Importantly, the additional phase difference due to the dark spins amplifies the signal of the central spin and allows it to read out a smaller field than before; the smaller the field that a sensor can read out during a given time, the higher its quantum sensitivity. While the signal is enhanced, the background noise stays the same.“Here we assume that part of the environment (the ‘dark spins’) can be controlled, although it cannot be directly measured,” Cappellaro said. “In this scenario, there are two possible strategies: manipulate the environment dark spins to decouple them from the sensor or exploit them by creating an entangled state with the sensor spin. We found that this second strategy is viable and yields better sensitivity.”Overall, the method achieves precision that approaches the Heisenberg limit. This limit results from the Heisenberg uncertainty principle and marks the maximum sensitivity that any measurement can achieve.When comparing this method to another measurement precision procedure based on a spin-echo, the researchers found that the new method has greater sensitivity due to the central spin’s signal amplification. Both methods have about the same coherence times, since, for both methods, decoherence arises from interactions among dark spins, not the rest of the environment.As the simulations demonstrated, the new method could have applications in improving clock sensitivity using trapped ions and magnetic sensing based on electronic spins in diamond. The scientists also predict that this method could be applied more generally to a wide variety of systems.“Extremely sensitive clocks are very important, for example, for global positioning,” Cappellaro said. “Magnetic sensors could find applications in a broad range of areas, from materials science to bio-imaging.” Explore further Creating a pure spin current in graphene Citation: Sensitivity of precision measurements enhanced by the environment (2011, April 27) retrieved 18 August 2019 from https://phys.org/news/2011-04-sensitivity-precision-environment.html 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. (PhysOrg.com) — When it comes to quantum measurements, interaction with the environment usually limits sensitivity, since it causes decoherence. But in a new study, scientists have shown that the environment can be advantageous. They have designed a method to increase the sensitivity of quantum precision measurements by using the environment to enhance a quantum sensor’s response to weak perturbations in an external field. A model of a central spin coupled to a spin bath of dark spins, which are part of the environment. By sensing the dynamics of the dark spins, the central spin has a greater sensitivity that allows it to read out smaller external fields, such as magnetic fields. Image credit: G. Goldstein, et al.
The National Gallery of Modern Art, New Delhi, Ministry of Culture, Government of India is organising an exhibition entitled ‘Gurudev: The journey of the maestro’. The event is being organized to commemorate the birth anniversary of Rabindranath Tagore – which falls on May 7. Rabindranath Tagore was fascinated by the worlds of literature, art, music, and dance at an early age. His expression in visual vocabulary is an enormous contribution towards the shaping of the modern art in India and setting a flow for the powerful expressive visual language in context to Indian art. His early paintings included doodles, rhythmical and lyrical lines as well as curves on his manuscripts to scribe out the unnecessary lines or words. These beautiful patterns went on to become his trademark in the art world. Also Read – Add new books to your shelfEach of his visual expression is very individualistic in nature. But for an outline, to enter in his visual world mainly consisting of paintings, one can see them broadly in two major categories. One of which is that of his observations and dialogues with nature and the other being the human – the portrait heads and the figures – which drift in nature or are emerging out of a space.Speaking about the exhibition Adwaita Garanyak, Director General, NGMA said, “I am elated that NGMA is presenting this exhibition at Jaipur House. These artworks of versatile genius give a glimpse of Tagore’s precious contributions to the visual language. I wish to thank Ministry of Culture, Government of India for supporting our endeavors and acknowledge the sincere efforts of the entire NGMA team towards the successful execution of this project.”The exhibition is on view for the public May 8 onwards from 11 am – 6.30 pm, except Mondays and national holidays.
This story originally appeared on PCMag LeEco, the Chinese tech conglomerate that began peddling its smartphones and TVs in the U.S. less than a year ago, on Tuesday announced plans to curtail its expansion, laying off hundreds of employees and all but eliminating its English-language marketing.The job cuts will hit the research and development staff in the company’s San Diego office the hardest, Bloomberg reported. Out of a staff of hundreds, only about 50 people will remain, mostly to provide support for current LeEco customers. Although the company did not announce an end to sales of its products in the U.S., it said that future marketing efforts would mostly be limited to the Chinese-speaking community. “In the past few months, we have gained a large foothold in Chinese-speaking households in the U.S. by offering tailor-made products and content for this community,” LeEco told Bloomberg. “We believe this provides us an opportunity to build on our strengths and grow from there.”Scaling back its English-language presence will relegate the company to a niche player in the U.S. market for consumer electronics, especially in the crowded TV and smartphone markets. LeEco once planned to buy TV maker Vizio, but that $2 billion deal fell through last month, with the company blaming “regulatory headwinds.”At a glitzy press conference last year in San Francisco, LeEco’s CEO took to the stage to announce the beginning of his company’s U.S. expansion, which he said would one day include electric bikes, self-driving cars and virtual reality headsets. But the future of those products could be in doubt even in LeEco’s home market of China, with Bloomberg reporting that the entire company will be restructured and that CEO, Jia Yueting, will give up day-to-day control.Many of LeEco’s products, including HDTVs, were still showing as in stock on the company’s website as of Tuesday afternoon, so if you’re eyeing one, you might want to click fast. Growing a business sometimes requires thinking outside the box. May 24, 2017 Free Webinar | Sept. 9: The Entrepreneur’s Playbook for Going Global Register Now » 2 min read