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Jamaica net emphatic win

Jamaica net emphatic win

first_imgBRIDGETOWN, Barbados (CMC): Jamaica’s junior Sunshine Girls produced a convincing performance to trounce hosts Barbados and clinch the Caribbean Netball Association Jean Pierre Championship at the National Stadium here on Friday night. In the long-anticipated clash of the unbeaten teams, Jamaica started strongly and never relinquished the advantage, as they stormed to an emphatic 35-21 result. Their success was propelled by goal shoot Lori Daley, who scored 24 goals from 32 attempts, while Zandra Cohen provided support with 11 from 12 attempts. For Barbados, goal attack Brianna Holder scored 11 from 19 attempts, while the usually prolific Tower Lorde was a perfect eight from eight. Jamaica threatened to put the game out of sight from the first quarter when they stormed to an 11-2 lead at the first break. In the second quarter, they outscored their opponents 9-5 to lead 20-7 at the half-time whistle. Jamaica again dominated in the third quarter, thanks to Cohen, who netted seven from seven, while Daley sank four of her five attempts. ASSURED VICTORY They were virtually assured of victory, leading 31-12 at the start of the final quarter and even though they were outscored 9-5 by the Barbadians, the Caribbean powerhouses were never in any real danger of losing. Jamaica ended on 35 points, four clear of the second-placed Barbados, while Dominica were a distant third on 22 ahead of St Lucia, courtesy of goal average. Grenada and Bermuda were fifth and sixth, respectively, after finishing on 17 points each, with Trinidad and Tobago second from last on eight points. Antigua and Barbuda finished without a win or a point. Dominica’s third-place finish came after they came from behind and produced a thrilling final-quarter effort to edge Bermuda 21-20 in a close contest. They were down 3-6 after the first quarter, 10-11 at half-time and had fallen behind by five, 12-17, at the start of the final period. However, goalshooter Celena Langlaise came up huge when it mattered, sinking eight goals from nine attempts, as Dominica outscored the Bermudians 9-3 to snatch victory. Overall, Langlaise finished with 20 from 25 attempts, while for Bermuda, Donnauri Robinson shot 15 from 21. Meanwhile, Grenada trounced the hapless Antigua 47-8, behind Brianna Durant’s 21 from 26 attempts and fellow goal shoot Carlene Alexander’s 21 from 28 attempts. In the other game of the evening, St Lucia beat T&T 31-18.last_img read more

Djokovic tops Federer’s conqueror for 11th US Open semifinal in row

Djokovic tops Federer’s conqueror for 11th US Open semifinal in row

first_imgGinebra beats Meralco again to capture PBA Governors’ Cup title “I was struggling. He was struggling. We were all sweating. Changing a lot of T-shirts, shorts,” said Djokovic, who will face 2014 U.S. Open runner-up Kei Nishikori on Friday. “Just trying to find a way to hang in there.”When Millman apologized for leaving the court at that juncture, Djokovic replied, “I’m fine to have a little rest,” then sat down on his sideline bench without a shirt on and cooled off.“I didn’t even know the rule,” said Millman, whose request to leave briefly was permitted based on something called the “Equipment Out of Adjustment” provision in the International Tennis Federation guidelines, because his sweat was making the court slippery.Widely considered the best returner in the game, Djokovic kept accumulating chances — and then failing to cash them in. He was able to come through on only four of his 20 break points.There were other issues for him, too, including in the third set when, ahead by a break, he was called by the chair umpire for allowing the 25-second serve clock, making its Grand Slam debut at this tournament, to run out on back-to-back points. After the first, he double-faulted, and he wound up getting broken there.ADVERTISEMENT Lights inside SMX hall flicker as Duterte rants vs Ayala, Pangilinan anew But he broke back in the match’s next-to-last game, then served out the victory at love.“I think the guy’s beat a brick wall once,” Millman said, “because he makes you work hard for every point and it’s relentless.”Earlier Wednesday, Nishikori defeated the man he lost to in the final four years ago, Marin Cilic, 2-6, 6-4, 7-6 (5), 4-6, 6-4. Add that to No. 20 Naomi Osaka’s 6-1, 6-1 win over unseeded Lesia Tsurenko of Ukraine, and Osaka and Nishikori give Japan semifinalists in both men’s and women’s singles at the same Grand Slam tournament for the first time in tennis history.“It’s great to see,” said Nishikori, who is into his third major semifinal — all in New York — but is still in search of his initial Slam trophy.For Osaka, who is 20, this is her first trip past the fourth round at a major. She purported to be “freaking out inside,” even if it certainly never showed.She’ll face No. 14 Madison Keys of the U.S. on Thursday night. Serena Williams plays No. 19 Anastasija Sevastova of Latvia in the other semifinal.Keys was one of four American women in the final four a year ago, when she was the runner-up to Sloane Stephens.She’s the only member of that quartet who made it back.Still in search of her first Grand Slam title, the Keys reached her third semifinal in the past five majors by using her big-strike game built on serves and forehands to overpower No. 30 Carla Suarez Navarro of Spain 6-4, 6-3.Keys won all 10 of her service games, saving the only two break points she faced. One came in the last game as she served for the victory, but she erased it with a forehand winner, part of a 22-10 edge in that category. Gov’t to employ 6,000 displaced by Taal Carpio hits red carpet treatment for China Coast Guard PLAY LIST 02:14Carpio hits red carpet treatment for China Coast Guard02:56NCRPO pledges to donate P3.5 million to victims of Taal eruption00:56Heavy rain brings some relief in Australia02:37Calm moments allow Taal folks some respite03:23Negosyo sa Tagaytay City, bagsak sa pag-aalboroto ng Bulkang Taal01:13Christian Standhardinger wins PBA Best Player award Lights inside SMX hall flicker as Duterte rants vs Ayala, Pangilinan anew Don’t miss out on the latest news and information. Allen Durham still determined to help Meralco win 1st PBA title Novak Djokovic, of Serbia, reacts during his quarterfinal against John Millman, of Australia, in the U.S. Open tennis tournament Wednesday, Sept. 5, 2018, in New York. (AP Photo/Frank Franklin II)NEW YORK — Novak Djokovic put aside all of it, from his opponent’s unheard-of, middle-of-a-set chance to change out of sweat-soaked clothes and shoes, to consecutive time violations because he let the serve clock expire, to the 16 break points he wasted.All that mattered, really, was that Djokovic managed to do what Roger Federer could not two nights earlier: beat 55th-ranked John Millman at the U.S. Open.ADVERTISEMENT MOST READcenter_img Japeth Aguilar embraces role, gets rewarded with Finals MVP plum Tim Cone, Ginebra set their sights on elusive All-Filipino crown Cleaning up Tokyo’s beaches: An Olympic task Keys, who is 23, thinks she is more equipped than ever to deal with important moments on important stages.“I’ve gotten a lot better managing my emotions once it gets to this part and knowing that everything is going to be probably more amped up,” she said. “And not shying away from those, but just really being honest about it and talking about it.”Sports Related Videospowered by AdSparcRead Next Gretchen Barretto’s daughter Dominique graduates magna cum laude from California college Nadine Lustre’s phone stolen in Brazil Djokovic moved a step closer to a third championship at Flushing Meadows and 14th Grand Slam title overall by eliminating Millman 6-3, 6-4, 6-4 to get to the tournament’s semifinals for an 11th appearance in a row. He sat out last year because of an injured right elbow.The No. 6-seeded Djokovic, who won Wimbledon in July, had been drawn to face Federer in the quarterfinals. But Millman scuttled that showdown by stunning the 20-time Grand Slam champ in four sets in the fourth round on a hot and humid evening that Federer said sapped his energy and made it hard to breathe.FEATURED STORIESSPORTSGinebra beats Meralco again to capture PBA Governors’ Cup titleSPORTSJapeth Aguilar wins 1st PBA Finals MVP award for GinebraSPORTSTim Cone still willing to coach Gilas but admits decision won’t be ‘simple yes or no’“I was, alongside many other people, anticipating the match against Federer,” Djokovic said.This night was cooler, as the temperature dipped into the 70s, but the humidity was above 80 percent, so with Millman drenched, he sought permission for a wardrobe change at 2-all in the second set. It was odd enough to see a player be allowed to do that during, instead of after, a set, but even odder for it to happen after an even number of games, rather than at an odd-game changeover. LATEST STORIES View commentslast_img read more

CNRL overtakes Encana to become Canada’s top natural gas producer

CNRL overtakes Encana to become Canada’s top natural gas producer

first_imgCALGARY, A.B. – Canadian Natural Resources Ltd has bought up about 12,000 natural gas wells across Alberta over the last two years, becoming the country’s largest natural gas producer as rivals have been selling assets or holding steady in a tough market brought on by the crash in oil & gas commodities in recent years.According to a Reuters analysis of regulatory data, CNRL’s shopping spree has  helped the company up its Alberta well count by 60 percent in the 24 months spanning the end of 2013 and the end of 2015, causing it to overtake Encana Corp. to become Canada’s top natural gas producer.While CNRL has bought assets during previous downturns, never before has the company acquired so many wells so quickly. The expanded footprint not only increases production, but also gives the company a strategic advantage that will pay off for years to come if the natural gas market improves.- Advertisement -With an extensive network of wells and the gathering pipelines that connect them, it can turn a profit from wells that might lose money in the hands of a smaller producer.Raymond James analyst Chris Cox says that “… these new wells have low production, but they were bought for pennies for the dollar.” Cox also noted that the wells are in adjacent properties which offers cost synergies, and “if you are expecting pricing to improve then you get an additional uplift.”CNRL’s natural gas production on the continent rose nine percent last year, and a whopping 35 percent the year before that.Advertisement With files from Reuters/The Financial Post. Read the full story here: http://business.financialpost.com/news/energy/canadian-natural-resources-overtakes-encana-to-become-canadas-top-natural-gas-producer?__lsa=79db-ba28 While CNRL bought wells, most rivals sold assets or maintained a steady well count. Cenovus Energy Inc’s well count dropped two per cent in Alberta between the end of 2013 and the end of 2015, and Penn West Petroleum Ltd shed nearly 30 per cent of its wells.CNRL President and CEO Steve Laut, who is the head of the biggest private landowner in western Canada – second only to the government, said the company had opportunistically bought wells across Alberta and British Columbia as they came up for sale in areas where it already operates.“Western Canada over time has become a very high cost basin and so it’s difficult to compete especially when commodity prices go down,” Laut told Reuters. “All industry … have to find ways to become more effective and more efficient.”The rise of fracking operations in North America has boosted gas production, causing natural gas prices to drop in recent years, but analysts expect prices to rise starting next year, buoyed by rising industrial demand, as well as export terminals beginning operations.Advertisementlast_img read more

Europe’s R1.3bn jobs, skills boost

Europe’s R1.3bn jobs, skills boost

first_img“The programme is also expected to stimulate joint planning, implementation and co-ordination across government departments and with civil society and the private sector,” the DTI said. Skills development “The purpose of the programme is to assist the economic sector departments of the South African government to accelerate South Africa’s economic growth rate and provide more and better jobs for poor people,” said Trade and Industry Minister Rob Davies. DFID Southern Africa head Helen Mealins said with the global economic downturn, the launch of the programme is a timely initiative to help create jobs and propose innovative ways for reducing unemployment. 14 September 2009 The European Commission and the DFID are providing €100-million and £18-million respectively to the programme, to support the South African government’s work in three clusters – economic, employment and infrastructure – and to stimulate innovative ways of accelerating growth and creating job opportunities in the country, the Department of Trade and Industry (DTI) said in a statement last week. The European Commission and the United Kingdom’s Department for International Development (DFID) have allocated about R1.3-billion for South Africa’s economic support and employment creation programme, it was announced at SA-EU Summit held in Cape Town last week. “With South Africa being a key driver of economic growth in southern Africa, the programme will contribute to a better quality of life for people in South Africa and the region,” Mealins said.center_img National government departments will also be able to access funds in order to partner provincial and local government, research institutions, the private sector, labour and civil society, to promote dialogue and find innovative ways of stimulating higher economic growth and employment. “Our relationship with South Africa is about improving peoples’ lives. With this new partnership, we continue to build on our already extensive co-operation and trust that our commitment will go some way towards strengthening South Africa in its pursuit of the Millennium Development Goals,” De Gucht said. Accelerating growth SAinfo reporterWould you like to use this article in your publication or on your website? See: Using SAinfo material Government departments in the economic sectors will have access to additional funds to promote skills development and initiate programmes that expand the capacity of the productive economy. EU Commissioner for Development and Humanitarian Aid Karel De Gucht praised the co-ordinated action of the European Commission and UK as a good example of working together to ensure maximum effectiveness of the assistance. last_img read more

Cartoon: Tweaty

Cartoon: Tweaty

first_imgThe Dos and Don’ts of Brand Awareness Videos Tags:#Cartoons#twitter#web More Noise to Signal. There’s a lot about Twitter that I find annoying: Auto DMs from people when I follow them (“Thanks for the follow! And please check out my acai berry multi-level marketing site!”). Random, Inspiration Lite™ quotations, stripped of all context. People who invent rules like “you have to follow everyone who follows you.” (No, you don’t. And you don’t have to eavesdrop on an intelligence agency just because they tap your phone line – in fact, they discourage it.)But just when I get crotchety enough to start shopping for a shawl and rocking chair, along comes what may be the one meme on Twitter that actually warms the cockles of my heart: Follow Friday.(I’ll pause here to let the derisive laughter die down.)Let me stipulate: a lot of #ff tweets aren’t much use. Some are just a random string of accounts; too many others recommend folks like @aplusk, @cnnbrk and @barackobama – not exactly out-of-the-box discoveries.But I’m finding more and more #ff tweets that put recommendations into context, saying these people are funny, or inspirational, or smart. And I’m seeing others that use Follow Friday to offer thanks, express love or suggest that people reach out and offer some comfort or attention. And when people use it that way, I’ve found I actually do find interesting new folks to follow.For all its faults and misuse, Follow Friday is adding a little to Twitter’s growing pool of social capital. So TGIFF… and let’s try to bring that spirit of generosity and gratitude to the other six days of the week. rob cottingham A Comprehensive Guide to a Content Audit Guide to Performing Bulk Email Verification Facebook is Becoming Less Personal and More Pro… Related Posts last_img read more

Awesome Cinematography Tutorial: The Flip Shot

Awesome Cinematography Tutorial: The Flip Shot

first_imgIn this video production tutorial, we show you how to create a “flip shot” using a DSLR and tripod – great for adding a dramatic touch to your project.Awesome Cinematography is a series where we talk about creating cinematography that will take your production value to the next level. In this episode, we demonstrate a simple DSLR trick shot that’s engaging and dramatic.  I recently used the “flip shot” in a short that I released. You can view it here.The Flip Shot basically involves a tripod that is sideways, parallel to the ground. The tripod needs to be elevated off the ground about 8-9 inches. In this example, I used apple boxes, but you can use a bag, a stack of books, or anything you can get your hands on.Gear list:Manfrotto 501 tripod (discontinued)Canon 5D mk3Tokina 11-16mmApple boxesSand bagsThe Flip Shot is a great way to add a dramatic element to your film. But, it is definitely one of those shots that you don’t want to overuse. It’s a great way to add confusion or discomfort to the scene.Can you think of a unique way to use the flip shot? Got any DSLR tips to share? Let us know in the comments below.last_img read more

5 New Features of Resolve 10

5 New Features of Resolve 10

first_imgBlackmagic Design has released their latest version of the powerful DaVinci Resolve color grading application, Resolve 10. In this video, check out the best new features.Have you tried DaVinci Resolve 10? Now available as a FREE upgrade for registered Resolve users (download here), version 10 is packed several powerful new features.In the video tutorial above, veteran colorist Warren Eagles picks his favorite upgrades to this Resolve release:Contrast Control with Pivot PointAnimating TextNew RAW Camera Files TabSplittler & Combiner NodesImproved Temporal Noise ReductionRender to EasyDCP Package (with plugin) In the last half of the video Warren goes on to plug the new Resolve V10 Fundamentals training course from FXPHD. They create nice educational content, so if you’re interested in really turning up your Resolve skills you can check that tutorial series out here.Have you started using DaVinci Resolve V10?Share your thoughts in the comments below!last_img read more

No riot after BJP came to power in U.P., says Adityanath

No riot after BJP came to power in U.P., says Adityanath

first_img“There has not been a single riot” in Uttar Pradesh since the BJP came to power, Chief Minister Yogi Adityanath said on Tuesday, as he counted the “achievements” of the first six months of his government.“It is a record for the State which used to have an ugly picture of it presented before the world,” Mr. Adityanath said.Releasing a 56-page booklet titled “Badh Chala Uttar Pradesh Ek Nai Disha ki Aur” or U.P. moves in a new direction, Mr. Adityanath claimed his government had taken strong steps to fulfil people’s expectations. The booklet starts with the government’s claims of having improved the law and order situation.It also refers to the controversial Anti-Romeo Squad as one of the achievements.Since the BJP came to power, the police had shot dead 17 accused criminals in alleged encounters, seized the property of 69 persons under the Gangsgter Act and Rs 35 crore worth of property from the land mafia.Referring to these figures, Mr. Adityanath, who was flanked by BJP cabinet ministers as well as UP DGP Sulkhan Singh, said: “Common people feel safe today and the police, whose morale was low under previous governments, is coming to the front. To a large extent, we have achieved in getting rid of the atmosphere of fear…”The government claimed that it had booked 54 persons under NSA, 1,145 under the Gangsters Act and 9,963 under the Goonda Act since March 20.It also refers to the controversial Anti-Romeo Squad as one of the achievements, saying action was taken against 2011 miscreants under it.The booklet also highlights the BJP’s programmes and schemes for farmers, in particular the loan waiver scheme for 86 lakh farmers. The government said it completed 2,367 ponds in the drought-prone Bundelkhand.A roadmap for doubling the income of farmers by 2022 had also been prepared.In the field of infrastructure, the government said it made 80,000 km of roads pothole free, while making the process of tender transparent.The BJP government also took credit for the Lucknow Metro which was inaugurated on September 5, saying it completed the remaining construction for the project, even though the trial run was done under the Akhilesh Yadav government last December.Mr. Adityanath’s list of achievements was released a day after he unveiled a “White Paper” of his six months in power. However, to the surprise of everyone, it focused on the limitations and criticisms of the previous SP and BSP governments, from 2003 to 2017, and had little about his own government.Mr. Adityanath said his government had inherited corruption, crime, goondagardi and lawlessness from the previous governments.Criticizing the BJP, SP spokesperson Rajendra Chaudhary said that by focusing on the limitations of the previous governments, the Yogi government was merely trying to “withwash” its failures and cover up its inaction.last_img read more

Ex-IPS officer under Bengal CID scanner

Ex-IPS officer under Bengal CID scanner

first_imgFormer IPS officer Bharati Ghosh has come under the scanner of the Criminal Investigation Department of the West Bengal Police in connection with a complaint of extortion and misappropriation of funds.A day after Ms. Ghosh alleged that her house was searched and her husband detained for several hours, CID officials held a press conference on Saturday refuting the allegations.Refute allegations“There are allegations in the media that raids were conducted at the residence of a retired police officer. There was no raid at the residence of any retired police officer,” Nishat Pervez, DIG Operations, CID, said. Mr. Pervez, however, admitted that the CID conducted search operations at a house in Naktala area of the city among other places, but refused to admit that the house had anything to do with Ms. Ghosh. “Till now, there is no confirmation that it [the house at Naktola] was the residence of a retired police officer,” he said.In the ongoing investigation, the CID is looking into the role of six police officers, some of whom served with Ms. Ghosh.last_img read more

Space station detector reports more hints of dark matter—or not

Space station detector reports more hints of dark matter—or not

first_imgNew reports of further evidence for dark matter have been greatly exaggerated. Yesterday, researchers working with the Alpha Magnetic Spectrometer (AMS), a $2 billion cosmic ray detector attached to the International Space Station, reported their latest data on a supposed excess of high-energy positrons from space. They contended—at least in a press release—that the new results could offer new hints that they’ve detected particles of dark matter, the mysterious stuff whose gravity binds the galaxies. But several cosmic ray physicists say that the AMS data are still perfectly consistent with much more mundane explanations of the excess. And they doubt AMS alone will resolve the issue.The leader of the AMS team, Nobel laureate Samuel Ting of the Massachusetts Institute of Technology in Cambridge, takes care to say that the new results do not prove that AMS has detected dark matter. But he also says the data lend more support to that interpretation than to some others. “The key statement is that we have not found a contradiction with the dark matter explanation,” he says.The controversy centers on AMS’s measurement of a key ratio, the number of antimatter positrons to the sum of positrons and electrons. In April 2013, AMS confirmed early reports that as the energy of the particles increased above about 8 gigaelectron Volts (GeV), that ratio, or “positron fraction,” increased, even as the individual fluxes of electrons and positrons were falling. That increase in the relative abundance of positrons could signal the presence of dark matter particles. According to many theories, if those particles collide, they would annihilate each other to produce electron-positron pairs. That would alter the balance of electrons and positrons among cosmic rays, as the usual source such as the cloudlike remnants of supernova explosions produce far more electrons than positrons.Sign up for our daily newsletterGet more great content like this delivered right to you!Country *AfghanistanAland IslandsAlbaniaAlgeriaAndorraAngolaAnguillaAntarcticaAntigua and BarbudaArgentinaArmeniaArubaAustraliaAustriaAzerbaijanBahamasBahrainBangladeshBarbadosBelarusBelgiumBelizeBeninBermudaBhutanBolivia, Plurinational State ofBonaire, Sint Eustatius and SabaBosnia and HerzegovinaBotswanaBouvet IslandBrazilBritish Indian Ocean TerritoryBrunei DarussalamBulgariaBurkina FasoBurundiCambodiaCameroonCanadaCape VerdeCayman IslandsCentral African RepublicChadChileChinaChristmas IslandCocos (Keeling) IslandsColombiaComorosCongoCongo, The Democratic Republic of theCook IslandsCosta RicaCote D’IvoireCroatiaCubaCuraçaoCyprusCzech RepublicDenmarkDjiboutiDominicaDominican RepublicEcuadorEgyptEl SalvadorEquatorial GuineaEritreaEstoniaEthiopiaFalkland Islands (Malvinas)Faroe IslandsFijiFinlandFranceFrench GuianaFrench PolynesiaFrench Southern TerritoriesGabonGambiaGeorgiaGermanyGhanaGibraltarGreeceGreenlandGrenadaGuadeloupeGuatemalaGuernseyGuineaGuinea-BissauGuyanaHaitiHeard Island and Mcdonald IslandsHoly See (Vatican City State)HondurasHong KongHungaryIcelandIndiaIndonesiaIran, Islamic Republic ofIraqIrelandIsle of ManIsraelItalyJamaicaJapanJerseyJordanKazakhstanKenyaKiribatiKorea, Democratic People’s Republic ofKorea, Republic ofKuwaitKyrgyzstanLao People’s Democratic RepublicLatviaLebanonLesothoLiberiaLibyan Arab JamahiriyaLiechtensteinLithuaniaLuxembourgMacaoMacedonia, The Former Yugoslav Republic ofMadagascarMalawiMalaysiaMaldivesMaliMaltaMartiniqueMauritaniaMauritiusMayotteMexicoMoldova, Republic ofMonacoMongoliaMontenegroMontserratMoroccoMozambiqueMyanmarNamibiaNauruNepalNetherlandsNew CaledoniaNew ZealandNicaraguaNigerNigeriaNiueNorfolk IslandNorwayOmanPakistanPalestinianPanamaPapua New GuineaParaguayPeruPhilippinesPitcairnPolandPortugalQatarReunionRomaniaRussian FederationRWANDASaint Barthélemy Saint Helena, Ascension and Tristan da CunhaSaint Kitts and NevisSaint LuciaSaint Martin (French part)Saint Pierre and MiquelonSaint Vincent and the GrenadinesSamoaSan MarinoSao Tome and PrincipeSaudi ArabiaSenegalSerbiaSeychellesSierra LeoneSingaporeSint Maarten (Dutch part)SlovakiaSloveniaSolomon IslandsSomaliaSouth AfricaSouth Georgia and the South Sandwich IslandsSouth SudanSpainSri LankaSudanSurinameSvalbard and Jan MayenSwazilandSwedenSwitzerlandSyrian Arab RepublicTaiwanTajikistanTanzania, United Republic ofThailandTimor-LesteTogoTokelauTongaTrinidad and TobagoTunisiaTurkeyTurkmenistanTurks and Caicos IslandsTuvaluUgandaUkraineUnited Arab EmiratesUnited KingdomUnited StatesUruguayUzbekistanVanuatuVenezuela, Bolivarian Republic ofVietnamVirgin Islands, BritishWallis and FutunaWestern SaharaYemenZambiaZimbabweI also wish to receive emails from AAAS/Science and Science advertisers, including information on products, services and special offers which may include but are not limited to news, careers information & upcoming events.Required fields are included by an asterisk(*)However, that interpretation was hardly certain. Even before AMS released its measurement of the ratio, astrophysicists had argued that the excess positrons could potentially emanate from an undetected nearby pulsar. In November 2013, Eli Waxman, a theoretical astrophysicist at the Weizmann Institute of Science in Rehovot, Israel, and colleagues went even further. They argued that the excess positrons could come simply from the interactions of “primary” cosmic rays from supernova remnants with the interstellar medium. If so, then the positrons were just “secondary” rays and nothing to write home about.However, AMS team researchers see two new features that are consistent with the dark matter interpretation, they reported online yesterday in Physical Review Letters. First, the AMS team now sees that after rising with energy, the positron fraction seems to level off and may begin to fall at an energy of 275 GeV, as would be expected if the excess were produced by colliding dark matter particles, as the original particles’ mass would put an upper limit on the energy of the positron they spawned. AMS researchers say the leveling off would be consistent with a dark matter particle with a mass of 1 teraelectron volt (TeV). (Thanks to Albert Einstein’s famous equivalence of mass and energy, the two can be measured in the same units.)Second, the AMS team measured the spectra of electrons and positrons individually. They found that the spectra have different shapes as energy increases. “It’s really surprising that the electrons and positrons are so different,” Ting says. And, he argues, the difference suggests that the positrons cannot be secondary cosmic rays produced by primary cosmic ray electrons, as such production should lead to similar spectra.But some cosmic ray physicists aren’t convinced. For example, in AMS’s graph of the electron fraction, the error bars at the highest energies are large because the high-energy particles are so rare. And those uncertainties make it unclear whether the positron fraction really starts to drop, says Stéphane Coutu, a cosmic ray physicist at Pennsylvania State University, University Park. And even if the positron fraction does fall at energies higher than AMS reported, that wouldn’t prove the positrons come from dark matter annihilations, Coutu says. Such a “cutoff” could easily arise in positrons from a pulsar, he says, if the spatial region in which the pulsar accelerates particles is of limited size. All told, the new results are “probably consistent with anything,” Coutu says.Similarly, Waxman questions Ting’s claim that the new data suggest the positrons aren’t simply secondary cosmic rays. If that were the case, then the electrons and positrons would be coming from different places and there would be no reason to expect their spectra to be similar, Waxman says. Moreover, he notes, AMS’s measurement of the positron fraction seems to level out just at the limit that he and colleagues predicted would be the maximum achievable through secondary cosmic rays. So, in fact, the new data support the interpretation that the positrons are simply secondary cosmic rays, he says. “To me this is a very strong indication that we are seeing cosmic ray interactions.”Will the argument ever end? AMS is scheduled to take data for 10 more years, which should enable scientists to whittle down the uncertainties and extend their reach toward higher energies, Ting says. “I think we should be able to reach 1 TeV with good statistics,” he says, and that should be enough to eventually settle the dispute. But Gregory Tarlé, an astrophysicist at the University of Michigan, Ann Arbor, says, “I don’t think that’s a legitimate claim.” Higher energy cosmic rays arrive at such a low rate that even quadrupling the data set would leave large statistical uncertainties, he says. So, Tarlé suspects, years from now the AMS results will likely look about as ambiguous they do now.last_img read more