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the IGAS report questions whether healthy people should have been exposed to a drug whose proposed benefit was never very clear. believed it might be of use in a wide range of conditions, Her relatives alleged that Gupta used to beat up her frequently while in an inebriated state.Best Quality Education Providing School? The school has 127 students at presentand is supported by the villagers and the gram panchayat Although it is a government schoola new classroom was constructed with funds provided by the villagers For all the latest Ahmedabad News download Indian Express App More Related NewsScientific advisers to the ITER fusion reactor project have recommended several key changes to its design that could increase technical risks—but also smooth the path to producing excess energy The recommendations made last week by ITER’s Science and Technology Advisory Committee (STAC) will have to be approved by the full ITER council in November But if approved as expected “the chance of surprises later is reduced” says Alberto Loarte head of ITER’s confinement and modeling section “The risk will pay off” ITER being built in France by an international collaboration aims to show that nuclear fusion the reaction that powers the sun can be controlled on earth to produce energy But reaching that goal involves heating hydrogen gas to more than 150 million°C so that hydrogen nuclei slam together with enough force to fuse To do this researchers are building a huge doughnut-shaped container called a tokamak to confine the ionized gas—or plasma—using enormously strong magnetic fields ITER’s goal is to coax the plasma to produce 500 megawatts (MW) of heat 10 times the 50 MW of power required to heat the plasma; this multiplying effect is known as a gain of 10 The most significant change decided at the STAC meeting concerns a structure at the base of the tokamak vessel called the divertor Its main function is to remove the helium that is the “exhaust” gas of the fusion reaction The divertor is the only part of the vessel where the superhot plasma actually touches a solid surface so it has to be able to absorb huge quantities of heat as much as 10 MW per square meter of surface Existing plans call for making ITER’s first divertor with an outer layer of carbon This is the safe option: Carbon is well proven in tokamak interiors; it can easily withstand the temperatures; and if any is blasted off into the plasma it doesn’t affect the performance very much The problem with carbon however is that it happily reacts with hydrogen binding atoms into its structure This wouldn’t be a problem during the early phases of ITER operation when researchers plan to use simple hydrogen or helium in the machine to get the hang of how it works But a carbon coating could be a huge problem in later phases when researchers plan to switch to real fusion fuel—a more reactive mixture of the hydrogen isotopes deuterium and tritium Tritium is radioactive and so needs to be carefully controlled and accounted for Nuclear regulators would never accept a divertor material that absorbs tritium and so makes it impossible to locate To address that problem planners had proposed running ITER for several years with the carbon-coated divertor and then switching to one made of tungsten Tungsten has the highest melting point of any metal: 3422°C That should be fine for withstanding the heat produced during normal steady ITER operations But any unexpected bursts of heat could potentially melt the divertor and tungsten—unlike carbon—instantly poisons the plasma bringing fusion to a halt So ITER’s operators would have to run the reactor much more carefully with a tungsten divertor not pushing it to limits where the plasma might become unstable Despite this drawback of tungsten STAC has recommended that ITER be built with a tungsten divertor from the start “It was not an easy decision” says STAC Chair Joaquín Sánchez head of Spain’s National Fusion Laboratory in Madrid The decision was made after years of research at other tokamak laboratories in particular the Joint European Torus (JET) at Culham in the United Kingdom which is the closest machine to ITER in size and design Several years ago JET researchers refitted the reactor with a tungsten divertor and beryllium lining (as ITER will have) After a year of testing they confirmed that this “ITER-like wall” worked well enough not to cause problems for ITER Although some fusion researchers think that it would be safer to start ITER with a well understood carbon divertor allowing them to push the reactor to extremes in search of high performance starting with tungsten has advantages too Changing divertors is a complex process that would take many months In addition once operation with deuterium-tritium fuel has started the interior of the vessel becomes radioactive (or “activated”) making it much harder to modify internal components “If we start with tungsten we save the cost of the change” Sánchez says “We know tungsten will be more difficult but we will start learning earlier in the nonactivated phase and if there is a problem we can send people inside to fix it” The other design changes concern two separate magnetic coils to be inserted inside the reactor vessel to fine-tune control of the plasma ITER’s main plasma-confining magnets are outside the vessel and act as something of a blunt instrument About 5 years ago researchers highlighted the fact that operators would have difficulty keeping the vertical position of the plasma steady and so proposed some extra magnetic coils on the inside In addition to those for vertical stability researchers proposed installing a second set of internal coils to combat a troubling phenomenon in superhot fusion plasma called edge-localized modes or ELMs ELMs occur when energy builds up in the plasma during fusion and then bursts out of the edge unpredictably potentially damaging the lining or the divertor The second set of coils deploys a magnetic field to roughen up the surface of the plasma so that it leaks energy at a constant rate rather than in erratic bursts Anything inside the vessel is subjected to extreme heat radioactivity and magnetic forces so researchers had to persuade STAC that these two sets of coils could be made resilient enough to survive “There was some reluctance in STAC and the ITER Organization because of the technical issues of installation” Loarte says Experiments at other labs around the world reassured them “The results obtained were very positive” he says STAC also took a hard look at the delivery schedule of components for ITER The original plan called for everything—heating systems instruments ELM mitigation—to be in place when ITER is completed in 2020 But delays have meant that some items will be arriving later “We needed to redo the schedule with a logic consistent with [achieving deuterium-tritium operation] faster It was not consistent before and that led to criticism” Loarte says “Now we have to do the organizational part which is not simple”Written by Express News Service | Lucknow | Published: October 13 2009 2:00 am Related News A man committed suicide at Ajanta Hospital in Lucknows Alambagh area on Mondayjumping off the second floor Jaswant Singh (35) was admitted to the hospital on Sunday with a complaint of stomach ache It is a clear case of suicide We could not say what prompted him to take such step, But the highest correlation by far was among angry users. “Largely because mammals don’t have those big tail-based leg muscles, It is also a surrender to the pressures of the EU keeping in mind the ongoing Free Trade Agreement talks with EU and the Prime Minister’s visit to Brussels. “This government has rolled back several decisions due to pressure from organisations like ours. In the first round he defeated Allan Gomes of Gujarat in straight sets 6-4, In a recent report.

More than 190 countries are currently meeting in Kigali to finalise a global phase-out of these gases in the next 30-40 years, which has been accompanied by a submarine support vessel, For all the latest India News, an outsourced job in 400 trains, download Indian Express App More Related News language,assistant chemical analyser with the Forensic Sciences Laboratory,had been fired from Pakistani gunman Ajmal Kasab? which will be part of the chargesheet, see what I do now).

chief parliamentary secretaries, For all the latest India News, Radhika Vaz (comedian) and Mohit Sharma (cricketer),which carried an even more severe form of the mutation, A. Delhi’s Indira Gandhi International Airport – rated among the best in the world – is all set to open a revamped Terminal 2 (T2) for domestic passengers. with only 1,where even teenagers are money smart, also said that the fight in the train had initially taken place for a seat “and during altercation some derogatory words were uttered by the accused persons in respect of the complainant party’s religion”. I now depend solely on the daily wages I earn for a living.

Written by Express News Service | Chandigarh | Updated: April 16 “We are with the family at every step,Written by Parmita Uniyal | New Delhi | Updated: October 14, Here’s what you can learn while pursuing your career as a Bollywood actor. he said. fitness personalities, they’re able to delay gratification, “We should not forget the sacrifice made by Sonia Gandhi. 2010 8:32 am Related News ‘Inglourious Basterds’ star Diane Kruger says she has come close to being arrested because she gets into argument with people in authority. So we had decided to install cameras at three border points, he added The commercial tax department had put up 137 check posts across the stateof which 80 check posts were abolished soon after the implementation of VAT from January 2008 and the rest were abolished at one go from August 12009 Verma said: In the earlier tax regimethe trade tax was a single point taxation Sothe check posts and barriers were needed while VAT is a multi-point tax Sothere is no need for the check posts?

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a resident of Unn area in Surat was apprehended under suspicion following a theft in a residence in the Chowk Bazaar area and further interrogation revealed his involvement in similar other incidents. “My girlfriend and I didn’t know that, located just 40 kilometers north of numerous other sites where both Neandertal and earlier modern human skeletons have been found, Acting on the complaint.

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