Vera at his ‘best’ ahead of ONE title defense vs Japanese foe

first_imgDon’t miss out on the latest news and information. View comments EDITORS’ PICK ONE Championship heavyweight champion Brandon Vera. Photo from ONE CHAMPIONSHIPBrandon Vera is set to defend his Heavyweight crown against an undefeated Japanese challenger Hideki Sekine in the main event of ONE: AGE OF DOMINATION on December 2 at Mall of Asia Arena.The Fil-American champion is returning to the ring a year since capturing the belt with a first round knockout victory over Paul Cheng, also at the MOA Arena.ADVERTISEMENT Taiwan minister boards cruise ship turned away by Japan PLAY LIST 01:31Taiwan minister boards cruise ship turned away by Japan01:33WHO: ‘Global stocks of masks and respirators are now insufficient’01:01WHO: now 31,211 virus cases in China 102:02Vitamin C prevents but doesn’t cure diseases like coronavirus—medic03:07’HINDI PANG-SPORTS LANG!’03:03SILIP SA INTEL FUND Vera will get a boost from the hometown crowd when he faces the 265-pound Sekine, who is undefeated in seven fights.“I can’t wait to be inside that ONE Championship cage again. The big fight atmosphere in Manila is amazing. Filipino fight fans are a passionate bunch.”Sports Related Videospowered by AdSparcRead Next MOST READ Smart hosts first 5G-powered esports exhibition match in PH We are young In the past year, Vera has stayed in shape after training exclusively here in the Philippines, where he has since relocated.“Training has been phenomenal. I train with the best fighters in the world at Alliance MMA and with some really top guys in the Philippines as well. I am always in shape and ready to go,” said Vera.FEATURED STORIESSPORTSGinebra teammates show love for SlaughterSPORTSWe are youngSPORTSCone plans to speak with Slaughter, agentEven at 39, Vera believes he’s still at the peak of his illustrious mixed martial arts career, where he has racked up 13 wins and seven losses.“My mixed martial arts career has had its up and downs, highs and lows. But I feel that right now, I’m the best that I have ever been. I’m in my prime and I feel great,” said Vera. Chinese-manned vessel unsettles Bohol town As fate of VFA hangs, PH and US forces take to the skies for exercise Mainland China virus cases exceed 40,000; deaths rise to 908 Irving, James lead Cavaliers over Pistons Smart’s Siklab Saya: A multi-city approach to esports PH among economies most vulnerable to virus 30 Filipinos from Wuhan quarantined in Capas Where did they go? Millions left Wuhan before quarantine Shanghai officials reveal novel coronavirus transmission modeslast_img read more

LEDs created from wonder material could revolutionize lighting and displays

first_img N. Zhou et al., Sci. Adv. 5, EAAV8141 (2019) LEDs created from wonder material could revolutionize lighting and displays By Robert F. ServiceJun. 4, 2019 , 4:45 PM When combined with polarizing filters, 3D-printed perovskite nanowires produce adjustable multicolor displays. In solar cells, the cheap, easy to make materials called perovskites are adept at turning photons into electricity. Now, perovskites are turning the tables, converting electrons into light with an efficiency on par with that of the commercial organic light-emitting diodes (LEDs) found in cellphones and flat screen TVs. And in a glimpse of how they might one day be harnessed, researchers reported last week in Science Advances that they’ve used a 3D printer to pattern perovskites for use in full-color displays.“It’s a fantastic result, and quite inspirational,” says Richard Friend, a physicist at the University of Cambridge in the United Kingdom whose team created the first perovskite LED in 2014. The result raises hopes that the computer screens and giant displays of the future will consist of these cheap crystalline substances, made from common ingredients. Friend cautions, however, that the new perovskite displays aren’t yet commercially viable.The materials in current semiconductor LEDs, including the organic versions, require processing at high temperatures in vacuum chambers to ensure the resulting semiconductors are pristine. By contrast, perovskites can be prepared simply by mixing their chemical components in solution at room temperature. Only a brief heat treatment is needed to crystallize them. And even though the perovskite crystals end up with imperfections, these defects typically don’t destroy the materials’ ability to emit light.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(*)In most perovskite LEDs, electrodes sandwiching the light-emitting material deliver charges—negatively charged electrons and positively charged electron vacancies. When the charges meet at the center of the sandwich, electrons fill the vacancies and give up a bit of their energy as a photon of light.The color of the photon depends on the perovskite’s chemical constituents, enabling researchers to tune the color by changing the perovskite’s recipe. The Cambridge group’s first perovskite LEDs glowed near-infrared, red, or green, depending on their makeup. Since then, the team and other groups have made a full spectrum of colors.The earliest perovskite LEDs converted only 0.76% of electrons into photons. That’s because electrical charges moving through the material got stuck at the boundaries between the myriad crystallites making up the material. But numerous teams have overcome that hurdle. Late last year in Nature Photonics, for example, Friend’s group reported that by adding a light-emitting polymer layer that helps steer charges around the surface defects, it had made red perovskite LEDs with an efficiency of 20.1%.A team led by chemist Edward Sargent at the University of Toronto in Canada took a different approach last year, spiking its perovskite recipe with an additive that formed crystalline shells around the perovskite crystallites. The shells blocked the defects from trapping charges, resulting in a green perovskite LED with 20.3% efficiency, the team reported in Nature. That remains well below the efficiency of many inorganic LEDs, but is probably good enough for some applications.Researchers led by Feng Gao, a physicist at Linköping University in Sweden, reported online on 25 March in Nature Photonics that they developed yet another way to tackle the defect problem. They targeted the tendency of lead ions at the edges of perovskite crystallites to trap passing electrons. With an additive that bound to the lead, they reduced the ions’ hunger for electrons and created a near-infrared LED that had 21.6% efficiency.The pace of improvements in the past 5 years has been “quite exceptional,” Friend says. Still, none of the perovskite devices survives more than about 50 hours, well below the estimated 10,000 hours needed for commercial use. Just why the perovskite crystals fall apart after a few dozen hours isn’t clear, Gao says. But short lifetimes also plagued early organic LEDs, he notes. And perovskite solar cell–makers have largely solved similar longevity issues by protecting their devices from air and humidity. “I’m optimistic this area can also develop quickly, and perovskite LEDs can improve,” Gao says.If they do, the latest work from researchers led by Jennifer Lewis, a materials scientist at Harvard University, could point to new strategies for constructing displays. Lewis and her colleagues used a 3D printer to arrange tiny, wire-shaped perovskite structures in multicolor displays. As the “ink” carrying the nanowires passed through the printer nozzle, shear forces aligned them, Lewis says. The common orientation of the nanowires gave light from each LED a single preferred oscillation, or polarization.For their prototype displays, Lewis’s team didn’t wire each LED to electrodes; instead, the researchers exposed the entire display to ultraviolet (UV) light. Like an applied electric voltage, the UV light kicks electrons out of their normal state, allowing them to move. Then, they can recombine with vacancies and emit visible light. But because the emitted light was polarized, Lewis and her colleagues could use polarizing filters to control it.In one example, the researchers used three different perovskite formulations to create displays in which each pixel contained a red, green, and blue spot side by side, with the orientation of the nanowires in each spot offset by 60°. By rotating a polarizing filter, the researchers could mix colors or isolate a single color.Plenty of hurdles remain for perovskite LEDs, Sargent says. But he adds, “This work jumps ahead 10 years in the future and shows what cool things we can do.”last_img read more

Pakistani squash players dont get financial benefits: Jansher Khan

first_imgKarachi, May 21 (PTI) Squash legend Jansher Khan believes that until the financial health of squash players improve, Pakistan cannot hope to regain past glory in the sport. ?The downfall of squash is mainly due to the fact that our players don?t get the required financial benefits from representing their country,? Jansher told PTI in an interview on Monday. The champion from the small hamlet of Nawakheli on the outskirts of Peshawar ruled the squash world by winning the World Open title eight times and the prestigious British Open six times between 1987 and 96. Jansher and Jahangir Khan dominated world squad for nearly two decades with their rivalry becoming a folklore in squash. ?People ask me why have our squash standard dipped. The truth is Pakistan is struggling in every other sport other than cricket because there is no private sponsorship or government support for them,? the 48-year old said. ?In no sport can we achieve good results until the government and private corporations get together to support the players. These sportsmen and women are our national assets and need to be given strong financial backing,? Jansher said. Jansher minced no words in stating that in Pakistan the biggest problem facing sports was lack of employment for players. ?Until the financial health and stability of these players improves don?t expect any miracles from them.? He noted that India had started doing well in other sports at the top level only because their government was investing a lot of funds into sports and players coaching/training and secondly their private sector was also strongly supporting different sports.advertisement ?They now host top leagues of different sports and it is helping them improve a lot.? Jansher said he also couldn?t have achieved the laurels he did for his country if the national airlines had not supported him in every way at the start of his career. ?If a sportsman or woman is financially unstable and worried about where his next rupee is going to come from how can he concentrate and focus on his game.? PTI KHS KHS KHSlast_img read more