Conversation with a Dietitian: Diet, Nutrition, Selective Eating, and Young Children with Autism

first_imgby Jamie Pearson, PhDDuring our webinar “Yuck! I don’t eat that!” we addressed a number of questions and misconceptions about diets and eating habits among young children with autism. We asked Dr. Seema Agrawal to share her expertise in addressing some of these misconceptions.  In the video below Dr. Agrawal answers the following questions:What trends have you noticed over the years in the increased diagnosis of autism and how that relates to diet and nutrition?Have you seen parents that are more in tune to what their children are eating and has that impacted diet and behavior for children on the spectrum?Can you explain what gluten-free, casein-free, and dairy-free diets might look like? From your experience and research, what impacts might these types of diets have for children and their families?What would you say to a parent if they have a child who is struggling with trying new foods and engaging in tantrum behaviors during mealtime? What recommendations might you provide for those parents?What would you say to parents if their child complains of a tummy-ache or if they’re not feeling well when they’ve tried a new food?How would you respond to questions about limited diet in children?  For example, “My child only wants to eat chips, white rice, and pasta! What do I do about this?”Do you have any specific suggestions that we can provide for military families who are supporting children on the spectrum?What final advice would you give to parents? Dr. Seema Agrawal is a registered dietitian and has more than twenty years of clinical experience in the field of nutrition. Her areas of research include the quality of life in individuals with disabilities. She is passionate about nutrition and feeding concerns for children with autism because her daughter was diagnosed with autism at the age of two and due her sensory needs, found it difficult to eat food.last_img read more

Decline of bees and other pollinators could worsen global malnutrition

first_imgAlthough bees, butterflies, and other winged creatures serve as natural pollinators for many of the world’s plants, they contribute only modestly to the world’s agricultural production—accounting for between 5% and 10% of the production of food crops. However, such natural pollinators may play a disproportionately large role in human nutrition and health, according to a new study. That’s because pollinators support crops that deliver essential nutrients to malnourished regions of the world, the data show, suggesting that regions already facing food shortages and nutritional deficiencies may be especially hard hit by the global decline of bees and other pollinators. Although pollination is essential for the cultivation of the world’s food supply, not all crops depend on pollinating animals. Corn, for example, is pollinated primarily by wind. However, many of the crops that do depend on natural pollinators are the richest in the vitamins and minerals essential for human health. Recent population declines of important pollinators, such as domesticated and wild bees, have prompted concerns for the potential effects on crop production—both economically and nutritionally. With this in mind, Rebecca Chaplin-Kramer, a landscape ecologist at Stanford University in Palo Alto, California, and colleagues set out to assess the importance of pollinators to global health by determining where pollination is most critical for the production of crops containing essential nutrients.To do that, the team of spatial scientists, pollination biologists, and nutritionists compiled data on the nutrient content, pollination dependence, and regional agricultural yields for more than 100 of the most common crops grown globally for food. The team integrated nutritional data from the U.S. Department of Agriculture with data from previous research reports on the global production and pollination dependence of crops. Using the combined data set, the researchers then created maps to identify hotspots that are most reliant on pollinators for the production of three essential nutrients—vitamin A, iron, and folate.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(*)Surprisingly, the researchers found that developed regions such as the United States, Europe, China, and Japan rely on natural pollinators for producing crops of high economic value, whereas parts of lesser developed regions such as India, South Asia, and sub-Saharan Africa depend more on natural pollinators for the production of crops that provide essential nutrients, as they reported last month in the Proceedings of the Royal Society B.“Taking these three separate lines of research—where crops are grown, how nutritious are they, and how dependent are they on pollination—you realize there are really different patterns in where nutrition production is most dependent on pollination,” Chaplin-Kramer says.The results suggest that pollinator declines could affect various regions of the world in very different ways. Ominously, the regions most dependent on pollination for providing nutrients were also those with a high prevalence of malnutrition and poverty. When the team added in data from the World Health Organization on the global distribution of vitamin A and iron deficiencies, they found that regions with a high prevalence of nutritional deficiencies overlapped with the regions most dependent on pollinators for delivering those same nutrients. Vitamin A and iron deficiencies were three times more likely to occur in areas where nutrient production was most dependent upon pollinators. Vitamin A deficiency is associated with vision loss and increased mortality, whereas iron deficiencies have been linked to pregnancy complications and impaired development and risk of death in children.The reliance on natural pollinators is not causing the increased rates of vitamin A and iron deficiency in these less-developed regions, Chaplin-Kramer notes. “It just so happens that these places that are already really nutritionally vulnerable are also the most reliant on pollinators to deliver nutrients,” she says. Still, she adds, the “pollinators matter more in these regions, therefore if there were pollinator declines, it would hurt these regions more.”“Whereas previous studies have identified areas at risk of losing production or income if problems with pollination arise, this study highlights that problems could be more widespread—specifically with respect to health,” says Nynke Schulp, a spatial ecologist at VU University Amsterdam, who was not involved in the study. The link between pollinators and global nutrition adds new importance to the continuing decline of pollinator populations occurring worldwide. However, the researchers note that there are a number of ways that regions could adapt to changes in so-called pollination services—including using managed bee colonies to supplement wild pollinators, switching to nutrient-equivalent crops that are less reliant on pollination, or importing nutrient-rich foods from other regions. “This is not a doomsday scenario, it’s a call to action”, Chaplin-Kramer says. “By identifying where pollination is most critical for meeting nutritional needs, we can prioritize where to direct future research and conservation efforts.”last_img read more

Man City Beaten At Norwich, Dropping 5 Points Off Liverpool (Video)

first_imgManchester City’s defense of the English Premier League title is already in trouble.Hapless defensive errors helped Norwich beat City 3-2 on Saturday and leave the defending champion five points behind perfect Liverpool after just five games.City hadn’t lost a league game since January — and drawn only once in that time — but conceded two goals to Norwich inside the opening half-hour. A team which soared last season was brought to earth.“The people cannot expect we win every time or make 100 points (every season),” manager Pep Guardiola said. “Even with the (score at) 3-2 we had chances to make another one. The team never gave up.”First, Kenny McLean evaded City’s marking to head in a corner from Emi Buendia, then City was caught unawares by a Norwich counterattack. Teemu Pukki and Todd Cantwell broke together, Pukki drawing the defenders before delivering the ball to give Cantwell an easy finish.Manchester City manager Pep Guardiola looks dejected on the touchline during the English Premier League soccer match between Norwich City and Manchester City at Carrow Road, Norwich, England, Saturday, Sept. 14, 2019. (Joe Giddens/PA via AP)Sergio Aguero revived City with a goal just before halftime — he’s scored in all of City’s first five games — but sloppy defending just after the break undid his work.Nicolas Otamendi failed to notice Buendia running in behind him and was robbed of the ball on the edge of the penalty area before Buendia passed for Pukki to score his sixth goal.Rodrigo’s low, hard shot for an 88th-minute goal gave City hope, but Norwich’s defense and goalkeeper Tim Krul weathered the storm for an unlikely win.Indeed, Norwich had to deal with more than just the Premier League champion. A wave of injuries left the underdog with a squad so depleted that it couldn’t find six outfield players as substitutes, instead picking two goalkeepers on the seven-man bench.As McLean put it: “When we have our backs to the wall we come out fighting.”By: James Ellingworth, AP Sports WriterTweetPinShare0 Shareslast_img read more

‘You don’t bounce back from hitting a woman’: Is this the UFC’s biggest lie?

first_imgShare on Messenger Share on Pinterest Greg Hardy spent one season with the Dallas Cowboys before switching to MMA. Photograph: Tim Heitman/USA Today Sports Support The Guardian Read more Sign up to The Recap, our weekly email of editors’ picks. US sports UFC Share on WhatsApp The UFC is persevering as it always has: by leaning into the chaos In an attempt to stifle journalists from asking further questions about Hardy, the promotion shielded the fighter from fight-week media obligations. The UFC took this decision despite Hardy’s place in the co-main event. When it comes to domestic violence, it appears that UFC thinks silence is golden.UFC did not respond to a request for comment on this story. Reuse this content Share on Twitter Topics Twitter … we have a small favour to ask. More people, like you, are reading and supporting the Guardian’s independent, investigative journalism than ever before. And unlike many news organisations, we made the choice to keep our reporting open for all, regardless of where they live or what they can afford to pay. Whether we are up close or further away, the Guardian brings our readers a global perspective on the most critical issues of our lifetimes – from the escalating climate catastrophe to widespread inequality to the influence of big tech on our lives. We believe complex stories need context in order for us to truly understand them. At a time when factual information is a necessity, we believe that each of us, around the world, deserves access to accurate reporting with integrity at its heart.Our editorial independence means we set our own agenda and voice our own opinions. Guardian journalism is free from commercial and political bias and not influenced by billionaire owners or shareholders. This means we can give a voice to those less heard, explore where others turn away, and rigorously challenge those in power.We hope you will consider supporting us today. We need your support to keep delivering quality journalism that’s open and independent. Every reader contribution, however big or small, is so valuable. Support The Guardian from as little as $1 – and it only takes a minute. Thank you.center_img Share on LinkedIn Pinterest Facebook Share on Facebook Share via Email features MMA Read more This Saturday former NFL defensive end Greg Hardy — a man once convicted of assaulting his ex-girlfriend — will make his official UFC debut. To add to the controversy, Hardy is scheduled to compete on the same fight card as Rachel Ostovich, who suffered a broken orbital bone during an alleged attack by her husband. Her husband, Arnold Berdon, was arrested for attempted second-degree murder but was later charged with second degree assault.The UFC’s decision to do business with Hardy and promote him on a fight card featuring an alleged victim of assault emphasizes the promotion’s tone-deaf approach to handling domestic violence and its apparent disregard for fighters’ violent pasts.In 2014, Hardy was arrested for assault after he was accused of attacking and threatening to kill his ex-girlfriend. The woman testified that Hardy threw her on a futon filled with guns and placed his hands on her throat. “He looked me in my eyes and he told me he was going to kill me,” she said. “I was so scared I wanted to die. When he loosened his grip slightly, I said just, ‘Do it. Kill me.’”Hardy denied the accusations but was convicted on two counts of domestic violence and was sentenced to 18 months probation and a two-month suspended jail sentence. Hardy appealed the sentence and managed to get the charges expunged from his record in 2015 after his ex-girlfriend failed to appear at court to give testimony. It was later reported she had settled a civil suit with Hardy. Greg Hardy fight highlights MMA’s troubling history of violence outside the octagon White maintained his stance for several months. Speaking at the 2014 NeuLion Sports Media & Technology Conference, White revealed that the UFC “screens people for The Ultimate Fighter, and if you’ve ever had a domestic violence, you can’t get on. Since this whole thing happened [with Ray Rice], we’re beefing up our policies with putting your hands on a woman. Of course, the way we always react is morally first then the business second.”But the UFC’s actual actions tell an entirely different tale. Will Chope was released by the promotion after news surfaced regarding a 2009 domestic assault conviction. Thiago Silva, who threatened his estranged wife with a gun and violated a temporary protection order, was released from the promotion but re-signed again after the charges were dropped. He was once again released two weeks later after the UFC received audio and video evidence posted by Silva’s ex-wife. But many other have been kept on by the promotion, despite allegations of domestic or sexual violence. Most recently, Abdul Razak Alhassan was indicted for the alleged rape of two women in March 2018. The UFC is yet to comment on Alhassan’s case.By December 2018, White’s stance on domestic violence had dramatically changed from his zero-tolerance approach. When asked about the UFC’s decision to place Hardy on the same fight card as Ostovich, White doubled down on the promotion’s baffling decision: “I called Rachael Ostovich and talked to her, walked her through the situation,” White said. “Her take was, ‘His story isn’t my story. Everybody’s story is different. I believe in second chances. I have no problem fighting on the same card as this guy.’ He didn’t have anything to do with Rachael Ostovich, so she was totally cool with it.” Last year, Kim A Gandy, CEO and president of the National Network to End Domestic Violence spoke to the Guardian about Hardy’s case. Gandy acknowledged that the charges were ultimately dropped but said that’s “not the same as not having done it,” adding that abusers who do not reckon with what they’ve done are less likely to be rehabilitated in the long run. “Someone truly sorry who seeks to help and genuinely make amends is very different from a person who commits extraordinary violence and not only takes no responsibility for it but takes position that the person just deserved it.”At the time of the incident, Hardy was playing for the Carolina Panthers. He later signed on with the Dallas Cowboys but was later given a 10-game suspension by the NFL in relation to the alleged assault. He returned later that year but found himself out of work when the Cowboys opted not to re-sign him. Seemingly shunned from football, Hardy turned his attention to MMA.Starting in 2017, Hardy compiled a 3-0 amateur record in fights that lasted a combined two minutes and 22 seconds. He followed those wins with his first professional victory, and signed a developmental deal with the UFC to compete on Dana White’s Tuesday Night Contender Series. After two consecutive knockout wins on the show, the UFC was ready to announce Hardy’s official debut.The UFC’s willingness to promote Hardy on a variety of their platforms, including their highly anticipated debut on ESPN+, highlights the gaping inconsistencies in their domestic violence policies. In the wake of NFL running back Ray Rice assaulting his fiancée in 2014, UFC president Dana White took a strong stance against domestic violence: “There’s one thing that you never bounce back from and that’s putting your hands on a woman. Been that way in the UFC since we started here. You don’t bounce back from putting your hands on a woman.” Since you’re here… Ostovich has since shared her thoughts on Greg Hardy in an interview with ESPN, stating that believes in “second chances.”“I’m glad he’s making a turnaround,” she said. “I hope the same can happen to my husband and anyone else who has made a wrong choice.”While Ostovich is willing to excuse Hardy, he remains a public relations concern and a controversial figure for the UFC. Ostovich’s comments do not deter from the seriousness of Hardy’s alleged actions and should not be misconstrued as an exoneration.And if White believes in second chances for Hardy, he doesn’t seem keen to talk about it in any depth. Despite the backlash over Hardy, the UFC added fuel to the fire when it told reporters at a press conference in December — which took place the same day that the Hardy fight news broke — that they were only allowed to ask questions about the fighters competing at the upcoming UFC 231. In response to the reports, the Mixed Martial Arts Journalist Association released a statement on its website confirming that several of its members felt as though they could not ask questions freely. When journalists finally came round to asking White about the UFC’s position on Hardy, the UFC boss blamed the media for stirring up controversy.“I already covered this. I’m not playing this bullshit with you guys. [Hardy] is on the UFC roster. Period. End of story,” White said. “Listen, you guys want to be sensitive about shit? Anyone can be sensitive about anything. You can make an issue about everything.”The problem with White’s statement is that domestic violence is a very real issue in mixed martial arts. According to a study of arrest records since 2003 by HBO Real Sports, MMA fighters have a domestic violence arrest rate (750 per 100,000) more than double the general US population (360 per 100,000) and far ahead of NFL players (210 per 100,000), who are often depicted as being at the heart of the problem.last_img read more

Report: Panama 0 United States 1

first_imgJozy Altidore’s second-half goal saw the United States overcome Panama 1-0 to complete a perfect group-stage campaign at the CONCACAF Gold Cup.Altidore’s overhead kick in the 66th minute gave USA a third win from as many games in Group D, securing top spot and a quarter-final clash against Curacao.USA made 11 changes to their starting line-up and it showed, but Altidore – having squandered two great chances earlier – stepped up to secure three points in Kansas City. Article continues below Editors’ Picks ‘There is no creativity’ – Can Solskjaer get Man Utd scoring freely again? ‘Everyone legged it on to the pitch!’ – How Foden went from Man City superfan to future superstar Emery out of jail – for now – as brilliant Pepe papers over Arsenal’s cracks What is Manchester United’s ownership situation and how would Kevin Glazer’s sale of shares affect the club? While they were unconvincing, Gregg Berhalter’s USA did enough to complete the perfect group-stage campaign.With his 42nd career international goal, @JozyAltidore puts the #USMNT up vs. ! pic.twitter.com/dTjCUMubmR— U.S. Soccer MNT (@USMNT) June 27, 2019USA made a lively start as they pushed for an opening goal and it almost came through Altidore in the 16th minute.After Panama turned over possession, Jordan Morris played in Altidore, but the striker pulled his shot wide from an angle from inside the area.Altidore squandered another chance five minutes later, the striker putting a tame shot straight at Panama goalkeeper Jose Calderon after a Cristian Roldan cutback.Jonathan Lewis was denied by an excellent Fidel Escobar block, while Jose Fajardo fired wide for Panama on the counter-attack six minutes before half-time.Both teams struggled to begin the second half, leading to the introduction of USA star Christian Pulisic just after the hour-mark.The opener followed for USA after a corner as Altidore scored his 42nd international goal.The set-piece went uncleared and some poor defending from Panama led to Altidore producing an overhead kick from close range to make it 1-0.That was all USA needed, closing out a narrow victory as neither side created much of note in the closing stages. What does it mean? Job done for USAUSA simply needed to avoid defeat to secure top spot and the easier quarter-final clash, avoiding Jamaica. Berhalter’s side got the job done despite what was an unconvincing display.Changes could hurt USAUSA were beginning to find rhythm in wins over Guyana (4-0) and Trinidad and Tobago (6-0). Still, Berhalter opted to rest what is seemingly his preferred team and it remains to be seen whether that was the right decision.Altidore goal not enoughThe Toronto striker scored, but he also missed two chances in the first half. That is unlikely to be enough to earn him a start ahead of Gyasi Zardes, who has three goals at the tournament.What’s next?Both teams will play in Philadelphia on Sunday. USA take on Curacao, while Panama face Jamaica. read morelast_img read more

Container Carriers Bringing Down Carbon Emission

first_imgzoom BSR’s Clean Cargo Working Group (CCWG) said in its latest annual CO2 emission performance data for the container shipping industry that on an average, its member carriers have reduced CO2 emissions per container transported in 2013 by 7.7%. 7.7% reduction of CO2 emissions per container in 2013Clean Cargo Working Group is a business to business collaboration between 40+ global customers and container carriers dedicated to accelerating sustainability improvements in the container shipping industry.This is the fifth year that CCWG has released its average trade lane emissions data in an effort to improve transparency and understanding of environmental impacts from goods transport. This is also the first year in which they disclose aggregated average utilization factors for each trade lane.The carriers included in CCWG represent 85% of all global container shipments, encompassing over 2, 900 ships calculated from 23 of the world’s leading ocean container carriers.A particular strength of the CCWG is that it collects and reports CO2 performance data not only at a global level, but also at a granular level for a set of standardised transportation routes (‘trade lanes’) e.g. Asia to the West Coast of North America. This gives customers more transparency in terms of performance numbers for the routes that they use – providing a more credible way of comparing performance.The continued performance improvement is also attributed to carrier fleet efficiency and data quality, both of which have direct benefits for shipping customers.As was reported earlier this year, Maersk Line has reduced CO2 emissions by 12% per container-kilometre in 2013 alone.“In total, we have now reduced our CO2 emissions by more than 34% since 2007. This is also reflected in the company’s absolute emissions, where we managed to cut emissions by 3.8 million tonnes in 2013 – despite growing our business by 4.1%,” Maersk said.“If we compare our ‘transportation route’ performance against the latest CCWG figures for the rest of the industry, Maersk Line continues to excel. In this benchmark, Maersk Line is the top performer or performing better than industry average on almost all transportation routes. On some of the largest routes, we are more than 20% better than the average transportation route performance,” Maersk added.Full report available here.Press Release, August 27, 2014last_img read more

Softwood lumber tariffs top of mind as Calgary hosts trade summit

first_imgIt’s impeccable timing for the event.The Alberta U.S. Trade Summit happens Tuesday and Wednesday in Calgary, just a week after U.S. President Donald Trump slapped tariffs on softwood lumber from most provinces, including Alberta.The two day event will feature addresses from the Lieutenant Governors of Montana and Washington and a bevy of Canadian intellectuals whose focus is on business and trade relations.The summit is hosted by Calgary Economic Development at the Telus Convention Centre.last_img read more

Canadian Press business newsmaker of the year selections over the years

first_imgTORONTO – A list of The Canadian Press business newsmakers of the year, as determined in an annual poll of newsrooms across the country:2017: Finance Minister Bill Morneau2016: The Foreign Investor2015: Bank of Canada governor Stephen Poloz2014: Former Tim Hortons CEO Marc Caira2013: Loblaw executive chairman Galen G. Weston2012: Bank of Canada governor Mark Carney2011: Jim Balsillie and Mike Lazaridis, co-CEOs of Research in Motion2010: Federal Finance Minister Jim Flaherty2009: Jim Balsillie, co-CEO of Research in Motion2008: Maple Leaf Foods CEO Michael McCain2007: Media tycoon Conrad Black2006: Federal Finance Minister Jim Flaherty2005: Media tycoon Conrad Black2004: Media tycoon Conrad Black2003: Media tycoon Conrad Blacklast_img read more

Federal leaders reading populist tea leaves to figure out whats brewing in

first_imgOTTAWA – A year after Donald Trump’s victory in the U.S. presidential election, it’s not just the pollsters and pundits continuing to mull over whether a similar populist upheaval could ever take root in Canada.Federal political leaders are also reading the tea leaves to see what could be brewing for them.Populism hasn’t always been a dirty word in Canada, Conservative leader Andrew Scheer points out.“To talk about a prairie populist from Saskatchewan 40 years ago, that wasn’t a negative connotation, that was someone who was fighting for the people and against some of the big icons of central Canada whether it was banks or railways or the other parties,” Scheer says.“In this political cycle, populism in some circles has a negative connotation.”For Scheer, that connotation is one he finds himself fighting against, as opponents routinely seek to paint Conservatives as one step away from the hard right base of the populist movement that put Trump in office.In 2018, he’ll seek to counter that narrative by presenting a new approach.The left will argue the government is always best placed to respond to any given issue, and if people don’t agree, they don’t care about the subject, he says.“The Conservatives come along and say there are other ways … let’s look at those options before we go to government. It takes a little bit longer to explain that sometimes and if people don’t see you leading with that emotional response they think you don’t share the same level of passion.”A distinctively northern style of populism does exist in Canada, polls by Ekos Research and The Canadian Press have suggested, one rooted not in the anti-immigrant or anti-trade sentiment that characterized Trump’s voter base. Instead, it’s a question of a shrinking middle class fearful of their future, and that of their children, and a sense things are just getting worse.NDP Leader Jagmeet Singh said he feels today there are two Canadas playing out — people who live in a wealthy well-connected world and the rest.For the former, they find a home in the Conservatives or the Liberals, he said.It’s the rest he’s seeking to captivate in part by taking cues from U.S. Democrat Bernie Sanders, who mounted a formidable challenge to Hillary Clinton in the U.S. presidential primaries, capitalizing on a desire for stronger progressive policies.“I’m trying to build the politics of unity and love and bring people together at a time where we have Trump dividing folks,” Singh said.“I’m trying to do similar to what Bernie did. He did it as an old white man, I’m doing it as a young brown dude.”Just as young voters were crucial to Sanders, so are they for the NDP.In the 2015 election, voter turnout among 18 to 24-year-olds jumped 18 percentage points to 57.1 per cent, the highest since Elections Canada began reporting turnout by age in 2004. A subsequent study by polling firm Abacus suggested among them, 43 per cent who backed the NDP in 2011 had switched their vote to the Liberals.Cynicism appears to have taken root since.At a town hall earlier this month at the University of Ottawa, Singh got several questions about why politicians don’t listen, never show up except at election time and seem to ignore those who refuse to clearly align with a particular partisan side — and how he was going to be different.Keeping young people engaged in politics will be among his priorities, Singh said.“We need to acknowledge that we were all really hopeful about a bunch of stuff and it didn’t work out and that hurts,” he said.“But it’s not reason to give up. We can’t give up. We can do better.”“Better is always possible” was the Liberals’ campaign slogan in 2015, and will continue to inform the government’s direction in 2018 as it seeks to implement policies it insists will see economic growth for all.That includes taking a new approach to free trade.“People don’t feel that trade is working for them. It’s working for the big businesses. It’s maybe working for political bottom lines, but it’s not helping ordinary people,” Trudeau told the Global News political show The West Block in a year-end interview.“And that’s why, you know, you get the populism and the nationalism.”Efforts to include chapters on gender and Indigenous issues in the revamped North American Free Trade Agreement with the U.S. and Mexico and include similar elements in a potential deal with China is part of the counter-populist effort.So too is work by the government to open up the doors on the G7 during Canada’s turn as host later this year. The hope is that by engaging Canadians in the process of the summit, they can in turn engage them in the policy and explain why it is in their best interests.Trudeau will also spent the first weeks of 2018 on a town hall style tour of the country.“If you’re not paying attention to people who are worried about feeding their kids, about paying their rent, about building a better future for them, you get to walk down the polarized, negative political world view that unfortunately we’re seeing in Europe, we saw a little bit of in the election of the south,” Trudeau told Montreal’s CHOM 97.7 FM earlier this month.“We see a lot of frustration and anger against a system that is not including everyone in the path to success.”last_img read more

Agadir to Host 8th Annual Agadir Open Surf Bodyboard Competition

Rabat – The Moroccan Royal Federation of Surf and Bodyboard is organizing the 8th annual Agadir Open 2018 competition, scheduled for March 16-18 at Imourance Beach in Agadir.A  statement by the organizers revealed that more than 260 Moroccan and international surfers will compete for the title of the 8th edition of the competition this year.The event, held in coordination with the Imourane Surf Club and the commune of Aourir, will see the participation of international Moroccan competitors: bodyboarder Ibrahim Iddouch, and pro surfer Ramzi Boukhiam. “The successful organization of previous European and Moroccan championships has emerged as key factors of success contributing to the leadership of Imourane surf club,” which seeks to promote its international reputation, according to the statement.Organizers added that the Agadir Open competition will sponsor international women’s surf and bodyboard competitions for the first time this year, hosted byWave Academy on the Agadir corniche.According to the press release, the events are also sponsored by Agadir’s Regional Council of Tourism and the Souss-Massa region. The Moroccan surf federation is encouraging the Imourane surf club to also host a European surfing competition for junior competitions.The Imourane Surf Club was founded in 2005, by local surfers and bodyboarder enthusiasts. Since then, the club has succeeded in helping surf lovers become national and international surf heroes.The club has previously organized several successful local and international surf events, including past editions of the Agadir Open. read more

Police officers deliver baby

While Police often deal with crimes they also respond to other life or death emergencies. Hamilton Officers Stephanie Balon and Jordan Constable were called to the home of Ashley Marvin, a young woman who was in labour and was unable to make it to the hospital. The officers were told they would only have to stay until the paramedics arrive but baby Gemma had other plans and was delivered at 6:30am Wednesday morning. This is Ashley’s third child.

Nuclear disarmament and nonproliferation require action from everyone – Annan

Video of address [17mins] “If we are truly committed to a nuclear weapon-free world, we must move beyond rhetorical flourish and political posturing, and start to think seriously about how to get there,” Mr. Annan said in an opening address to the 2005 Review Conference of the Parties to the NPT. “I challenge you to recognize that [disarmament, non-proliferation and the right to peaceful uses] impose responsibilities on all States.” An important step would be for former Cold War rivals to commit themselves irreversibly to further cuts in their arsenals, so that warheads number in the hundreds, not in the thousands. “We can only hope to achieve such major reductions if every State has a clear and reliable picture of the fissile material holdings of every other State, and if every State is confident that this material in other States is secure,” he said. The Conference, which kicked off today at UN Headquarters in New York and will run through 27 May, brings together top officials every five years to review the status of the NPT, the world’s most widely adhered-to multilateral disarmament accord, with 188 States parties , including the five declared nuclear-weapon States. Recalling the horrific explosions of Hiroshima and Nagasaki, which had ushered in the nuclear age, the Secretary-General painted a dire picture of “chaos and confusion” in the immediate aftermath if such a nuclear catastrophe were to occur in a major city today. “Tens of thousands of people would die in an instant, and many more would die from exposure to radiation,” he said, adding that carefully nurtured collective security mechanisms could also be discredited. In the 35 years since entering into force, the landmark NPT has “confounded the dire predictions of its critics,” Mr. Annan said, noting that nuclear weapons have not spread to dozens of States and that indeed, more States have given up their ambitions for such weapons than have acquired them. A watchful eye has also been kept on the supply of materials to make nuclear weapons, and recent steps had been taken to dismantle weapons and reduce stockpiles. “The global non-proliferation norm has been firmly established,” he said, but added: “We cannot afford to be complacent. The plain fact is that the regime has not kept pace with the march of technology and globalization, and developments of many kinds in recent years have placed it under great stress.” But Mr. Annan said that he firmly believed “our generation can build a world of ever-expanding development, security and human rights – a world ‘in larger freedom,’” echoing the UN Charter and the title of his recent comprehensive agenda for UN reform. He urged State parties to ensure that measures for compliance are made more effective, to maintain confidence that States are living up to their obligations. They must also act to reduce the threat of proliferation not only to States, but to non-state actors. “As the dangers of such proliferation have become clear, so has the universal obligation for all States to establish effective national controls and enforcement measures,” he said. “The obligation therefore falls on all States – nuclear and non-nuclear alike – to increase transparency and security,” he declared. “Indeed, unless all States recognize that disarmament, like non-proliferation, requires action from everyone, the goal of general and complete disarmament will remain a distant dream.” read more

Jure Vran in Frisch Auf Goppingen

Slovenian goalkeeper, Jure Vran (27) signed contract witha member of Handball Bundesliga  FA Goppingen.  FA Goppingen decided to find a new goalkeeper after injury of Adam Weiner. Vran debut for national team this year after national team took Zvonimir Serdarusic. In Slovenia he played for Cimos Koper and last two season – Slovan Ljubljana. ← Previous Story Barna Putics in VfL Gummersbach Next Story → Danijel Saric got permission to play for Bosnia and Herzegovina Jure VranSlovan Ljubljana read more

TOTAL DOMINATION Twelve EUROs Champs – 11 Norwegian medals

2002DenmarkDenmark25–22Norway 1994GermanyDenmark27–23Germany 2014 Story of European handball is story about amazing generations of Norwegian handball ladies! Tournament in Sweden was 12th organized by European Handball Federation since 1994, when in Germany Denmark won first ever EURO gold by beating Germany 27:23.How deep and huge are domination of Norwegian women’s handball national team – the best way to describe is to tell a fact that Norway won 11 medals and only missing is one from Romania in 2000, when they finished sixth!Seven gold medals, three silver and one bronze, with amazing fact that since 2004, Breivik and then Hergeirsson lost only gold medal in Belgrade 2012, when Montenegro won 34:31 after extra-time.All Women’s EHF EURO’s finals: ← Previous Story Seventh EURO gold for Norway! Next Story → Buzzer-beater by Svan Hansen for Berlin’s tears in Flensburg 2004HungaryNorway27–25Denmark 1998NetherlandsNorway24–16Denmark 2006SwedenNorway27–24Russia 2010 2008MacedoniaNorway34–21Spain 2000RomaniaHungary32–30 (ET)Ukraine Croatia / HungaryNorway28–25Spain 1996DenmarkDenmark25–23Norway 2012SerbiaMontenegro34–31 (2ET)Norway 2016SwedenNorway30–29Netherlands Norwegian handball girls Denmark / NorwayNorway25–20Sweden read more

BAHAMAS Energy Conference opens at Baha Mar

first_imgFacebook Twitter Google+LinkedInPinterestWhatsApp#Bahamas, January 30, 2018 – Nassau – Diversification of fuels, a comprehensive regulatory framework, the introduction of renewable energy sources, a new generating plant and green island project are among the strides the Bahamas Government has made in the energy sector.  The Hon. Desmond, Minister of Works, underscored that notwithstanding the country’s challenges it has and continues to make “incremental” advances in this area.Minister Bannister addressed the opening of the 18th Annual Platts Caribbean Energy Conference, Thursday, January 25th, 2018 at Grand Hyatt Baha Mar.  The two-day event focuses on key issues facing the Caribbean energy sector.Topics include: Market Structure and Stakeholder Alignment, Financing for Small Countries, Regional Demand, Fuel Conversion Viability, Renewable Energy, Managing Distributed Generation and Integrated Resource Plans.  A panel discussion and case studies also comprise the conference agenda.  There is a diverse range of speakers on the agenda including Darnell Osborne, Chairman, Board of Directors, Bahamas Power and Light.In his welcome, Minister Bannister noted the following as the  “fundamental” importance of the conference: the renewal of contacts industry-wide, the discussion and analysis of critical issues of mutual interest, and the sharing of innovative ideas with colleagues from diverse backgrounds from around the world.Minister Bannister said The Bahamas is currently ensuring the security of its energy supply through the diversification of fuels even as it continues to modernize the energy infrastructure.  In this regard, he said a proposal is in place to remove the price volatility with a generation mix that is 100% based on fossil fuel.“With the introduction of tri-fuel generation (liquid natural gas, diesel and heavy fuel oil), The Bahamas will have the flexibility of selecting its fuel based on any number of reasons including price.“We also continue to focus on the development of a comprehensive governance/regulatory framework to effectively support the advancement of the energy sector to be effectively able to facilitate energy conservation and efficiency through the introduction of renewable energy sources such as solar, ocean energy, biofuels, waste to energy and where possible, wind.”He said it is anticipated that a new state-of -the-art generating plant will soon be constructed with the best in class efficiencies for single cycle power generation.  He told the audience that the new facility will improve the generation capacity, modernize the plant, and provide newer technologies together with higher levels of energy conservation and improved efficiencies when compared to existing assets.Minister Bannister remarked that cost effective, progressive ideas for creating and installing renewable energy resources are “critical” to The Bahamas.“Every year we face the threat of hurricanes that may impact the vibrancy of life in our many islands.  Finding a niche in the spectrum of opportunity will be of great value to our country.“We have the perfect environment to foster small scale renewable generation in our many Family Islands, and we embrace this emerging technology to assist in the further development and modernization of our energy infrastructure as we seek to improve our conservation and efficiency capabilities.”He told the delegates that the nation’s challenges provide great opportunity for those who are able to propose innovative, enterprising and dynamic ideas for solutions and he is certain officials will be pleased to engage in meaningful discussion with them.  As an archipelago, practical energy solutions must be provided to numerous islands, all diverse, and each in differing stages of development.“There is no magic formula that that provides an answer to every need. We will, therefore, listen with interest to the various presenters, and consider many of the ideas that you propose as we seek to make decisions that will impact the lifestyles of our residents for decades to come.”S&P Global Platts is the leading independent provider of information, benchmark prices and analytics for the energy and commodities markets. By: Kathryn CampbellPhoto caption:  The Hon. Desmond Bannister, Minister of Works, addresses the opening session of the 18th Annual Platts Caribbean Energy Conference. (Photo/Courtesy BPL) Facebook Twitter Google+LinkedInPinterestWhatsAppcenter_img Related Items:last_img read more

Allocate more funds for completion of pending irrigation

first_imgKadapa: The round table meeting of various farmers associations headed by AP Rythu Sangam held here on Tuesday has requested chief minister YS Jagan Mohan Reddy to ensure for allocating more funds in the current budget which is being introduced on 11th July in interest of completing all pending irrigation projects in the district. The meeting also demanded MLA’s of the district to bring the issue to the notice of the chief minister by raising it in the budget sessions see allocating more funds. Also Read – Rs 65.30lakhs Exgratia paid to deceased family Advertise With Us Speaking the occasion AP Rythu Sangam state vice president B.Narayana said that injustice is being made to the Rayalaseema districts related to completion of irrigation projects for several decades due to political discrimination. AP Rythu Sangam district secreatary B.Dastagiri Reddy has urged the farmers to join in the movement to pressurize the government for completion of pending irrigation in the district. Also Read – Three of a family commits suicide at Amalapuram in East Godavari Advertise With Us He said after YSR congress emerged to power there was hope in the farmers that being as native of Kadapa district Jagan Mohan Reddy will take initiative completion of irrigation projects Galeru Nagari Sujala Sravanthi(GNSS), Handri Neeva Sujala Sravanthi(HNSS) Telugu Ganga Project etc as early as possible. AP Rythu Sangam district secretary B.Dastagiri Reddy, M.Chandra Mouleswara Reddy(Saguneeti Samithi), V.Manosai Reddy(Rythu Jagruthi sangam), R.Siva Reddy(Rythu Swarajya vedika) and others were present.last_img read more

Code Changes Reveal Plans for Instagram Music Stickers Report

first_imgInstagram code snippets mentioning music stickers, as found by Techcrunch. Instagram’s music integration comes at the heels of Facebook striking deals with the major record labels at the beginning of this year. The company also recently announced an integration with Spotify, letting users share music from the Spotify app directly to Instagram Stories. ×Actors Reveal Their Favorite Disney PrincessesSeveral actors, like Daisy Ridley, Awkwafina, Jeff Goldblum and Gina Rodriguez, reveal their favorite Disney princesses. Rapunzel, Mulan, Ariel,Tiana, Sleeping Beauty and Jasmine all got some love from the Disney stars.More VideosVolume 0%Press shift question mark to access a list of keyboard shortcutsKeyboard Shortcutsplay/pauseincrease volumedecrease volumeseek forwardsseek backwardstoggle captionstoggle fullscreenmute/unmuteseek to %SPACE↑↓→←cfm0-9Next UpJennifer Lopez Shares How She Became a Mogul04:350.5x1x1.25×1.5x2xLive00:0002:1502:15 Popular on Variety Facebook-owned Instagram may be getting ready to launch a new music stickers feature, Techcrunch reported Monday. Recent code changes reveal plans to give Instagram users the ability to search for music alongside other content that can be added to Instagram Stories as stickers, according to the report.Facebook didn’t immediately respond to a request for comment.In addition to simply adding emoji, hearts and birthday hats,  Instagram users can already add hash tags, a location, time and other dynamic content to photos and videos they want to post as stories. Soon, users may also be able to search for songs, genres and musical moods to add as music stickers, with music presumably being played while users look at their stories.last_img read more

Flatland we hardly knew ye Unique 1D metasurface acts as polarized beam

first_imgStructure of the metasurface beam splitter. (a) Schematic diagram. TM light enters the slits in plasmonic waveguide mode and is reflected by the bottom Al layer. The light is strongly negatively reflected, as indicated by the chromatic sector. The reflection includes light corresponding to lateral SPR, as shown by green arrow, and light in the non-diffraction zone shown in Fig. 2(b1) and Fig. 3(b1). TE light cannot enter the slits and is primarily reflected. (b) SEM images of the top and side views (insets) of the fabricated device. The grating pitch is T = 420 nm, the width of the dielectric PMMA is t1 = 170 nm, and the width of the metal Al in the bottom PMMA-Al grating layer is t2 = 250 nm. The thicknesses of the PMMA and Al are h1 = 110 nm and h2 = 30 nm, respectively. The size of the Al on the sidewalls of the PMMA grating lines is t3 ´ h3 = 20 nm ´ 110 nm. The substrate is silicon. Credit: Zheng J et al. Highly anisotropic metasurface: a polarized beam splitter and hologram. Scientific Reports 4, 6491 (29 September 2014). “Our technique is quite different from that generally employed in metamaterials research, where very fine nano-size resonators are often required to achieve a specific function, and where the diffraction effect – while more efficient and robust in either periodical or aperiodical structures – is rarely considered,” Ye points out. Our study gave us the profound perspective that we can gain knowledge by utilizing long-established basic mechanisms to alleviate the difficulty of nano-optical device fabrication, rather than by pursuing very complex metastructures without considering cost and application practicality.”Summarizing their approach to creating a novel polarized beam splitters, Ye says that a dielectric grating was fabricated by nano-imprinting or laser interference on a silicon or glass substrate. “The grating was subsequently coated with ten nanometers of metal film by E-beam evaporation,” he tells Phys.org. “In order to narrow the slits to restrain the TE diffraction, the deposition was optimized to make the metal film conform to the dielectric grating as far as possible. In doing so, the metal deposited on the side walls of the grating lines helped reduce the slit width.”The paper discusses how metasurface beam splitting enables a broad range of useable wavelengths and incident angles with flexible tunability in operation by not relying on a resonant coupling mechanism. “For the metasurface polarized beam splitter with TM negative reflection/TE reflection, the upper limit of the working wavelength is determined by the pitch, and the lower limit is decided by the slit width. Thus,” he explains, “by choosing appropriate grating pitch and slit width, the polarized beam splitting can be achieved. For further improving the extinction ratio, it needs to optimize silt and metal thickness.” Therefore, the device is flexible tunability in a wide range of spectra which is more robust than those beam splitters using resonant mechanism in which grating height, refractive index, pitch and duty circle must be precisely designed.”Relatedly, our metasurface holograph – decodable only by transverse-magnetic polarized light –consists of a bilayer metal grating which ensures that only TM light can be diffracted. This means that the metasurface hologram can only be decodable by TM light, and the real image is reconstructed in the reflection side with the negative first order refraction.” Periodically constructed metamaterials, in which permittivity (a measure of how an electric field affects, and is affected by, a dielectric medium) and permeability (the degree of magnetization that a material obtains in response to an applied magnetic field) have simultaneous negative values, creating negative refraction (a dimensionless number that much light is bent when entering a material. More information: Highly anisotropic metasurface: a polarized beam splitter and hologram, Scientific Reports 4, 6491 (29 September 2014), doi:10.1038/srep06491 © 2014 Phys.org Improving terahertz optics with efficient broadband antireflection coatings Journal information: Scientific Reports In addition to the 1-D metasurface applications discussed in the paper – displays, holograms, and laser optics – Ye mentions several others:Compact reflective mirrors for laser cavities where the polarized output is required to meet the coherence for optical communication or laser interferenceDiffractive gratings in optical spectrometers, where the TM diffraction efficiency is stably high in a wide waveband with high angle resolution since the pith is only several hundred nanometers, which has several advantages: as a reflection element it provides a range of benefits, such as allowing the controlling circuit to be placed below the reflective surface, and more advanced integrated circuit technology becomes available when the substrate materials are not limited by their opaqueness; and a folded light path wherein the input and output light beam share the same physical space, which offers a desirable compact arrangementAs a novel plasmonic beam splitter, it can also be implemented in integrated optics devices for communication: TM light is diffracted into one waveguide and TE light is reflected into the other, allowing the two beams to be manipulated for further useThere are also long-term implications of a higher-security anti-counterfeit plasmonic hologram produced by adding the additional criterion of what Ye refers to as the “simple example” of polarization dependence demonstrated in the paper. “The greater enlightenment is that plasmonic effects can be used for higher-security anti-counterfeits,” he confirms. “In fact, not only the polarized diffraction-change of the brightness but also the polarized reflection-change of the color can be utilized as new criterions to judge a hologram.” Yet another advantage of the plasmonic anti-counter faking is that optical resonance can be well-engineered by the thickness of metal films, slit width and grating pitch, substantially increasing the cost and difficulty of fakery – especially for a complex pattern with several values of pitch, metal thickness and direction of the metallic nanowire grating. “In a word,” Ye notes, “we open a new door for the application of metasurface devices in anti-counter faking.”Moving forward, in the near future the scientists are planning to create a theoretical 1-D metasurface model that presents a quantitative effective refractive index to analyze structural properties, thus facilitating further device design. “In the long-term,” he adds, “for polarized beam splitting we plan to increase the waveband and extinction ratio for both reflection and negative reflection simultaneously by using a more delicate nanowire arrangement. Moreover, in addition to our current emphasis in anti-counter faking, we’ll be looking at other applications, including integrated optics, spectrometers and laser cavities.” Another important innovation that the researchers might consider developing is combining actively tunable metasurfaces with other techniques, such as liquid crystals and electrowetting. “Tunability will enable metasurfaces to be applied to displays, optical storage and communications,” Ye tells Phys.org. “Also, we’re considering if the optical properties we’ve observed can be extended to other frequency spectra – for example, the terahertz range, since doing so may help us to build terahertz devices. In closing, Ye says that other areas of research, such as high-field laser physics, might also benefit from their study. Citation: Flatland, we hardly knew ye: Unique 1-D metasurface acts as polarized beam splitter, allows novel form of holography (2014, October 24) retrieved 18 August 2019 from https://phys.org/news/2014-10-flatland-knew-ye-unique-d.html (Phys.org) —Traditional three-dimensional (3-D) plasmonic metamaterials with metallic structures – artificial materials that exploit coherent delocalized electron oscillations known as surface plasmons produced from the interaction of light with metal-dielectric materials – exhibit unique electromagnetic properties not found in natural materials, such as extraordinary transmission beyond the diffraction limit, efficient light-harvesting ability, plasmonic color filtering, and the ability to control the reflection or transmission direction of a light beam. However, they are difficult to fabricate, have a narrow usable bandwidth due to their resonant character, and exhibit low optical efficiency due to the inherent metal absorption. While two-dimensional metasurface structures have been proposed in an attempt to address these functional limitations, they still require complex designs and sophisticated fabrication procedures. Spectra and photos of a 280-nm-pitch grating. (a) Measured (solid lines) and simulated (dashed lines) NR (blue and cyan lines) and reflection (red and magenta lines) spectra for TM (blue and red lines) and TE (cyan and magenta lines) light with an incident angle of 60o. The inset is the simulated extinction ratio of NRTM/NRTE. (b) Photos of the device irradiated by un-polarized white light with an incident angle of approximately 60o and filtered by a polyvinyl alcohol (PVA) plastic polarizer (extinction ratio of 300). The yellow dotted line indicates the direction of the grating lines. The white dashed lines illustrate the electric field direction of the light passing through the polarizer. An SEM image of the device is also presented. The dielectric grating in the device was fabricated by laser interference, with an Al thickness of 50 nm. Credit: Zheng J et al. Highly anisotropic metasurface: a polarized beam splitter and hologram. Scientific Reports 4, 6491 (29 September 2014). Optical performance is not the only issue the scientists faced: The fabrication challenge is that in order to obtain high extinction ratio for both negative reflection and reflection, the ratio between the silt-width and pitch is always smaller than ½ – that is, the exposure condition for laser interference lithography (LIL) should be optimized. “The issue will be more challenging as the slit-refractive index increases, because the slit width should be further reduced to achieve the cut-off effect,” Ye notes. “Smarter design of the grating structures is needed for the high extinction ratio of both reflection and negative reflection, especially for a very wide waveband device.”The third challenge was combining the intrinsically fringed structure of a hologram and the anisotropic character of metasurface beam splitter. “In a hologram, the interference fringes usually have random direction, pitch, duty cycle, and depth,” Ye points out. “Therefore, to combine the hologram and beam splitter, photoresist processing and recording parameters should be well-designed in order to get deep and narrow slits for guaranteeing high-efficiency of TM light and inhibiting TE diffraction simultaneously. Otherwise, extinction ratios for both negative reflection and reflection will be lowered.” Moreover, since a laser hologram is usually recorded on photoresist film in the form of fringes caused by two-beam interference, the patterns are typically fringed structure with pitch decided by the wavelength and angle between the interference beams. “To obtain maximum diffraction efficiency,” Ye explains, “the fringes should be deep enough – but the contradiction is that deepening photoresist fringes causes slit width to increase, which in turn weakens anisotropy.”The researchers leveraged a range insights and techniques to address these challenges. “In our one-dimensional metasurface, the key point was fully combining the intrinsic properties of dielectric-metal-dielectric slit and the diffraction characteristics of grating, and finding the proper parameters to meet the required waveband,” Ye recounts. “At the same time, the starting point of our research is physically as simple and fundamental as the description in classic optics textbooks that for diffraction to exist in a grating, the light should be able to enter into the slits. Therefore,” he explains, “by considering the fact that in metal-insulator-metal waveguides TM mode is always supported while TE mode is dissipative in sub-wavelength size, we intuited that TM diffraction can be made to break the diffraction limit – corresponding to vector diffraction optics – while for TE light the diffraction should disappear without ‘sensing’ the slits, corresponding to geometrical optics.” The demonstration of the hypothesis not only convincingly reveals a new way to control photons, but also gives a very clearly physical image for the transition between scalar optics (where the optical phenomena can be described by scalar diffraction) and nano-optics (where the wavelengths are much larger than the size and pitch of the resonant units so the diffraction is therefore absent.) Recently, scientists at Shanghai Jiao Tong University proposed a unique method for controlling photons with a 1-D metasurface that, by integrating diffraction, waveguide, and plasmonic effects, is fundamentally distinct from 2-D or 3-D methods. The 1-D metasurface they presented, based on bilayered metallic nanowire gratings, behaves as an ideal polarized beam splitter that produces highly anisotropic strong negative reflection for transverse-magnetic (TM) light and efficient reflection for transverse-electric (TE) light. (Anisotropy is the property of being directionally dependent, as opposed to isotropy, which implies identical properties in all directions.) Moreover, by combining this feature with the fringed structure of a hologram, the researchers demonstrated a higher-security anti-counterfeit metasurface holograph, that can be decoded only by TM light.Dr. Zhicheng Ye discussed the paper that he, Dr. Jun Zheng and their co-authors published in Scientific Reports with Phys.org. A key factor is simplifying the metastructure to a one-dimensional metasurface using a bilayer metallic nanowire grating. “Designing three- or two-dimensional nanoantenna arrays can modify the optical wavefront with spatially-varying phase response,” Ye tells Phys.org. “However, complex designs and sophisticated fabrication procedures are required. Simplifying the metastructure to one dimension is preferred for applications and large-scale production, but the structure that allows tunable parameters is limited. Therefore, the main challenges to achieve specific functions using bilayer metallic nanowire grating involve exploring and utilizing the intrinsic properties of surface plasmon waveguide, combining these with the diffraction characteristics of grating, and finding proper parameters.”Relatedly, Ye continues, using bilayer metallic nanowire gratings with nano-slits as 1-D metamaterials to realize both polarized negative reflection and reflection carries its own challenges. “Thus far, the dielectric or metal beam splitters based on gratings usually have narrow working spectrum and angle range. On the other hand, these studies have typically focused only on transmission and reflection properties – but polarized diffraction has not been considered,” he explains. “We proposed the bilayer metallic nanowire gratings with nano-slits as 1-D metamaterials to realize polarized negative reflection for transverse-magnetic light and reflection for transverse-electric light, with a broad range of useable wavelengths and incident angles.” The key point is that metasurface beam splitting does not rely on a resonant coupling mechanism, thereby enabling a broad range of useable wavelengths and incident angles, with flexible tunability in operation. “The main challenge was determining how to simultaneously realize broadband, angle-insensitivity and high polarization extinction ratios. Our research shows that, the grating pitch should be large enough to ensure a broad working spectrum; the slit should be wide enough to insure that transverse-magnetic light can be refracted strongly, but also thin enough to suppress TE refraction efficiently; and the proper slit height should significantly enhance the polarization extinction ratio.” Metasurface hologram. (a) Photoresist hologram fabrication scheme: The badge was placed perpendicularly to the photoresist film, and both were illuminated by a large cross-section collimated laser beam with an incident angle of 49o to the photoresist film. (b) Microscopy and SEM images of the top views of the metasurface hologram film at different scales. The film consists of randomly distributed B-MNGs with a pitch of 300 nm. The width of the dielectric PMMA is t1 = 150 nm, and the thicknesses of the PMMA and Al are h1 = 110 nm and h2 = 50 nm, respectively. (c) Real images reconstructed using TM and TE laser light, respectively. The metasurface hologram was illuminated by a TM or TE laser with a wavelength of 532 nm and an incident angle of 75o. The reconstructed real 3-D image was formed by the negative first-order diffraction mode with a diffractive angle of 55o and was imaged onto a black screen, as presented in the bottom left pictures. The image was also viewed with a camera, as presented in the top right pictures, or directly by eye. Credit: Zheng J et al. Highly anisotropic metasurface: a polarized beam splitter and hologram. Scientific Reports 4, 6491 (29 September 2014). Explore further 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

Burberry turns rain into shine for summer 2013

first_imgThus bring on a fuchsia pink trench coat, an electric blue bomber jacket or a shiny turquoise lapel on a classic tweed overcoat. Footwear, mainly of the sturdy sandal type, and practical tote and iPad bags also come in glaring hues.But fear not. Bailey wouldn’t dream of leaving his tried and true customer out in the cold.Along with the shimmering shockers, the show was filled with traditional tweeds, classic suits albeit with a slim cut and country old favorites: raincoats, field jackets and oversized parkas.(Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.) 4 sleep positions for men and what they mean Top Stories 4 ways to protect your company from cyber breaches More Valley freeways to be closed this weekend for improvements Meghan McCain to release audiobook on conservatism, family AP Fashion WriterMILAN, Italy (AP) – “Come rain or shine” read the fashion notes at Burberry Prorsum.But the latest menswear collection by British designer Christopher Bailey, shown Saturday in Milan, was much more about shine than it was about England’s proverbial bad weather.Everything in the summer 2013 preview collection, from short-sleeved shirts to traditional rain attire, was in shining, almost blindingly bright shades of metallic, or better yet, fluorescent fabric.center_img Sponsored Stories Comments   Share   Quick workouts for men Think Tank analyzes the second round of Democratic debates New high school in Mesa lets students pick career pathslast_img read more