Alzheimer’s Research Strategy Announced
An international panel of experts released recommendations today for future research on Alzheimer’s disease. The recommendations will help guide the research component of the new national plan for Alzheimer’s disease announced Tuesday by Health and Human Services Secretary Kathleen Sebelius. The plan sets the ambitious goal of developing effective prevention and treatment strategies for Alzheimer’s by 2025.The new research strategy was developed by experts who met during a 2-day summit at the U.S. National Institutes of Health (NIH) in Bethesda, Maryland, earlier this week. The panel acknowledges a number of challenges facing the field, including the need to develop better experimental models and to initiate clinical trials at earlier stages of the disease. Their recommendations include conducting more interdisciplinary research on the biological mechanisms of Alzheimer’s disease and therapeutic targets, enabling more rapid and extensive sharing of data and biological specimens, and fostering more public-private partnerships (along the lines of the Alzheimer’s Disease Neuroimaging Initiative, a successful biomarker development effort jointly funded by NIH and the pharmaceutical industry). The panel also calls for more research on nondrug interventions, such as lifestyle changes, that might prevent or slow the disease. A financial stimulus for Alzheimer’s research appears to be in the works: President Barack Obama’s proposed 2013 budget includes $80 million in new funding. Congress has yet to weigh in on that plan.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(*) U.S. National Institute on Aging, Alzheimer’s Disease Education and Referral Center Warning signs. Developing brain scans and other biomarkers that detect the earliest stages of Alzheimer’s is a priority for researchers. 
Sri Lanka reached 165-4 in its first innings to trail India by only seven runs at stumps Saturday on Day 3 of the first test at Eden Gardens.Bad light forced an early end just after 4 p.m. local time with 24.2 overs remaining. Dinesh Chandimal was unbeaten on 13, while Niroshan Dickwella was 14 not out. (Virat Kohli unhappy after Dinesh Chandimal’s ‘fake fielding’ leaves India stunned)India was earlier bowled out for 172 runs in its first innings of the three-test series. The hosts lost their last five wickets in the morning session as bad weather that had washed out most of the first two days finally gave way to sunshine.Sri Lanka reached tea at 113-2 and Lahiru Thirimanne (51) and Angelo Mathews (52) extended their third-wicket partnership after the interval to 99 runs. Thirimanne reached his fifth test half-century off 86 balls.That’s it from Day 3. The play has been called off earlier than normal due to bad light. India 172, Sri Lanka 165/4 with U Yadav & B Kumar bagging two each #INDvSL pic.twitter.com/TTq0Bazhor- BCCI (@BCCI) November 18, 2017Mohammed Shami (0-53) was unlucky not to get any breakthrough. That came at the other end as Umesh Yadav (2-50) had Thirimanne caught at second slip.Mathews then reached his 28th test half-century off 88 balls. Shortly after, he became Yadav’s second dismissal, chipping a simple catch to Lokesh Rahul at cover.Sri Lanka crossed 150 in the 43rd over. The Indian pacers bowled some testing spells but weren’t able to make further inroads as Chandimal and Dickwella held off to add 27 runs for the fifth wicket.advertisementBCCI Photo Sri Lanka had begun its reply in hectic fashion as openers Sadeera Samarawickrama (23) and Dimuth Karunaratne (8) quickly put on 29 runs for the first wicket.Bhuvneshwar Kumar (2-49) struck the first blow. Dimuth Karunaratne was trapped lbw and the decision stood despite a DRS review from the batsman. Two overs later, Samarawickrama was caught behind as Kumar struck again.Shikhar Dhawan dropped Thirimanne at first slip off Yadav in the 18th over.Resuming on 74-5, India added another 98 runs before its first innings ended at lunch.Cheteshwar Pujara top scored for India with 52 runs while Suranga Lakmal was the most successful of the Sri Lankan bowlers, capturing 4-26.Pujara, 47 overnight, reached his 16th test half-century off 108 balls before he was bowled by an inswinger from Lahiru Gamage.Wriddiman Saha (29) and Ravindra Jadeja (22) added a valuable 48 runs for the seventh wicket before they both departed in the same over from Dilruwan Perera.Mohammed Shami, batting at 10, chipped in with a rapid 24 to prop up the tail before he was the last man out.
You just arrived in Austin, TX for famed music, film and interactive conference SXSW. Sure you have tons of bands to see and parties to attend, but Austin is also an wonderful city that needs to be explored for its amazing restaurants, shopping and natural beauty. Ditch the travel guide and listen up: we visited this incredibly cool city more than a few times and asked some locals to give us an insider’s look on where to eat, drink and shop. Check out our recommendations below and get the most out of your SXSW journey this year.ShopSTAG ProvisionsAs the “modern-day general store for every man,” it doesn’t get better than STAG. Stocking everything from clothing, antiques, accessories and grooming essentials from the best and brightest brands, they pair high end with low, mix vintage classics with new collections and meld the unexpected with the nostalgic. And with brands like Billykirk, Burkman Bros and Kika NY, it’s the one-stop-shop for everything cool.Service MenswearIf STAG represents the East Coast, Service Menswear definitely holds down the West. Swimwear from brands like Sundek and Quiksilver Originals will have you ready to dive into Barton Springs, and street wear like RVCA and Vans have your outdoorsy side covered.Room Service VintageIf thrifting is more your thing, stray from the string of vintage haunts on South Congress to find much better deals. There are a ton of great stores, but Room Service Vintage was a personal favorite. With everything from cowboy boots to barware to vintage Playboys, you could spend hours searching every nook and cranny.EatSa-TénLocated in the Canopy creative community, this cool new spot serves up coffee, tea and delicious Japanese toasts and plates. There’s a type for everyone, from the extra savory Pork Sausage or Sriracha Mayo Smoked Salmon toasts to the vegetarian-friendly mushroom and egg varieties. Don’t miss the Chicken Katsu with Curry, best ordered with a side of anchovy toast for the full menu experience.Odd DuckIt’s a tale as old as time in Austin, when a great food trailer turns into a brick-and-mortar restaurant, and Chef Bryce Gilmore did the most with his shiny new outpost of Odd Duck. The menu is focused on seasonal and local ingredients with dishes like goat lasagna with spinach, béchamel and brussels sprouts and a refreshing risotto with cauliflower, goat cheese and grapefruit.Rudy’s Country Store and Bar-B-QAs pork rib enthusiasts, we did our research before heading down south and conjured a list of BBQ places to try. But our Austin friends suggested we ditch the hyped joints and hit this tried and true spot, and the locals are always right. Order at the counter, cafeteria style, by the rib, slice or pound. Tell the crew you’re a newcomer and they’ll let you try before you buy.Thai-KunNamed one of America’s Best New Restaurants in 2014 by Bon Appétit, this food truck specializes in “O.G. Thai” from chef Thai Changthong. Located at Whisler’s on the East Side, be prepared to eat some of the spiciest food in town with dishes like Beef Panang Curry and Waterfall Pork, grilled and sliced with Tiger Cry sauce. Grilled Bread with Peanut Curry Sauce and Black Noodles will help put out the fire.Related: Best BBQ Spots Across the U.S.DrinkThe Driskill Hotel BarIf you’re looking for a good date spot or just a strong cocktail in a swanky lounge, the Driskill Hotel bar is the epitome of Southern charm. Pony hair upholstery, stained glass ceilings and a haunted grand staircase lend ambiance as a live bluegrass band provides the entertainment.Rio RitaHead to the East Side of Austin for, in our opinion, pretty much the best bar patios in the country. But our favorite has to be Rio Rita for a colorful backyard and killer cocktail menu. You won’t regret ordering the Bloody Mary, or any of their concoctions for that matter. Try the sinus-clearing habanero shot if you dare.BarbarellaIf you’re looking to dance and go a little HAM, Barbarella is the place to drop it like it’s hot. Unpretentious for a club, busy nights feature three DJs – upstairs, downstairs and patio – so you can choose your own musical adventure. The Side BarDrinks here are cheap, and we mean like really cheap. Located right in the middle of downtown, it’s the perfect place to stop in for a drink or shot in-between shows. Like most of the other watering holes in Austin, The Side Bar has a huge backyard full of picnic tables to rest your tired legs.ChillBarton Springs PoolEven though the icy waters of Barton Springs might be too cold to swim in this time of year, grab some friends and relax on the grassy hill while taking in the view. The Best American Liqueur Jameson Releases Two New Caskmates Editions The Absolute Best Rye Whiskey Brands for Under $50 Editors’ Recommendations The Oasis on Lake TravisThis incredible lookout spot may be a 30 minute drive from Austin city proper, but it’s worth the time spent on the road if you need a break from SXSW madness. Stay to eat or just come for a view of the sunset. The Manual Spirit Awards 2019: The Best Craft Liquor Made in America If You Haven’t Visited the Kentucky Bourbon Trail, What Are You Waiting For?
The Best Black Jeans to Have You Stepping Out in Style This Black Boathouse Is a Luxurious Retreat on a Small Island in Norway Editors’ Recommendations Tuxedo Tips: Your Guide to Nailing Black-Tie Attire This All-Black Cabin is Like a Pair of Binoculars Taking in the Canadian Wilderness Dirtbag Style Guide: 5 Lessons That Apply to Everyone There’s just something about the color black. It’s simple, classic, minimal, can be dressed up or dressed down, and best of all — it goes with just about everything. So we couldn’t tell you how excited we were when we found out that the Swiss watch label Tudor, Rolex’s little brother, in case you didn’t know, is introducing one of its most favorite styles in black. That’s right, the Heritage Black Bay divers’ watch, one of Tudor’s most popular styles —which was first released in 2012 and a winner at the Grand Prix d’Horlogerie de Genève — is coming out with a black bevel. Previously, it only came in red and blue, which could be an inconvenience if you don’t want to be associated with blue or red.Previously, there was only one Tudor Heritage Black Bay model in black that was made for the Only Watch charity auction. This release marks the first time that the Tudor Heritage Black Bay model timepiece will be available to the general public in all black. So next time you want to go for a dive, look sharp in a suit, or be cool in jeans, a t-shirt and a pair of Converse, go for the Tudor Heritage Black Bay timepiece. It will keep you on time whether you’re 200 feet deep in the ocean, or running around the streets of a major city in the world.Tudor Heritage Black Bay Watch, $3,425 on steel bracelet, $3,100 on distressed leather strap; for more information, visit tudorwatch.com.
The Canadian Press TORONTO — Buffy Sainte-Marie has won this year’s 50-thousand dollar Polaris Music Prize.A jury of 11 music critics, bloggers and broadcasters named the album “Power in the Blood” the best Canadian record of the last year.The folk icon beat out nine other finalists for the award including rap superstar Drake, former Polaris winner Caribou and Toronto rockers Alvvays.Sainte-Marie, who already had a crowded trophy case heading into Monday night’saward ceremony, told the audience she didn’t expect to win the Polaris and appreciated its cash prize.The award show, which was held in Toronto, was hosted by Juno-winning children’s entertainer Fred Penner.
Claisse is introducing its new instrument that has been specifically designed to weigh and dispense borate flux with high precision. It is way more than a weighing device: it is an indispensable tool to ensure efficient sample preparation laboratory management. It eliminates human calculation errors and fatigue during the weighing process for increased accuracy and reproducibility.In addition to leading to a more efficient use of the operator’s time during the weighing process, it increases their safety by decreasing the risk of operator injuries caused by repetitive tasks.Moreover, the three available weighing modes (sample-to-flux ratio, catch weight, and absolute weight ) provide a seamless integration in laboratory standard operation procedure.The tank stirrer option provides constant performance for high and low throughput.LeDoser industrial grade balance is made from cutting-edge weighing system technology for robustness.LeDoser instrument includes an intuitive touchscreen interface that makes it very user-friendly.The smart flux flow software control ensures constant yield and maximized weighing speed. There are even no calculations needed to determine the flux weight in relation to sample quantity!LeDoser instrument can save up to 80% of the weighing time. Its simple and efficient mechanism made of durable parts and its robust industrial grade balance ensure low maintenance, low cost of ownership and ultimately, a quick return on investment.
Friday 9 Jun 2017, 1:40 PM Tweet thisShare on FacebookEmail this article 21,046 Views ‘People have died for their country so we want our lads to put their bodies on the line’ Ireland’s assistant boss has been glad to see injured captain Seamus Coleman link up with the group ahead of Sunday’s World Cup qualifier. 67 Comments Here’s what the Ireland starting XI to face Austria should beWith a host of missing players, Austria could well be there for the taking Share17 Tweet Email2 Short URL By Ben Blake Nobody died. He broke his leg and that will heal. I think he’s in good hands with Everton and I’m led to believe the surgeons are really happy with how it’s gone so that’s good news.“It’s nice to have him around the place and hopefully he will bring some positive energy to the group. He’s here for a few days and the game, it’s a pity he’s not able to play but whoever starts at right-back won’t let us down.” Coleman watching on from the sidelines. Source: Tommy Dickson/INPHOWith Ireland sitting joint-top of Group D with Serbia, and both Austria and Wales four points back at the halfway point, a home win this weekend would go a long way to securing at least a play-off place at the 2018 World Cup finals.Having already beaten their latest opponents in Vienna and with Austria missing a string of first-team players, the Boys in Green are favourites to get a result and Keane is in no doubt that this group will be ready to go that extra mile.“You want players playing on the edge and putting their bodies on the line, which players have done before — people like Seamus Coleman,” he said. “You have to be able to accept whatever goes on, like Seamus breaking his leg. Follow us: the42.ie ROY KEANE IS hopeful that the presence of Seamus Coleman can give the Ireland players an extra boost ahead of Sunday’s clash with Austria.The team’s captain is currently recovering from a double leg-break suffered in the draw with Wales back in March, but arrived into camp yesterday and will remain with the squad for the crucial World Cup qualifier in two days’ time. Roy Keane alongside Martin O’Neill at training today. Source: Tommy Dickson/INPHO“It’s nice to see Seamus around the place,” Ireland assistant boss said after today’s training session.“He’s been in since last night and it’s good to catch up with him. It looks like his recovery is going well and he seems in good spirits so it’s nice to have him amongst the players.“I think they’re all glad to see him. Unfortunately, he’s not available to play but hopefully he will be back in a few months. The important thing is that his recovery is going really well.”The Everton full-back will be a significant loss to the side with Derby County’s Cyrus Christie due to fill in, but Keane added: “Seamus has got an injury but he will get over it, like lots of other players. Jun 9th 2017, 1:40 PM “People have done a lot more for their country than breaking their legs. People have died for their country so we want our lads to put their bodies on the line and give everything they’ve got.“That’s my mindset when I’m working with a group of players. We’re going into battle on Sunday, be ready to put your body on the line like Seamus did. You’ve got to follow that.” Source: The42.ie/YouTubeThe42 is on Instagram! Tap the button below on your phone to follow us! https://the42.ie/3435264 
Facebook Twitter Google+LinkedInPinterestWhatsApp Related Items: Facebook Twitter Google+LinkedInPinterestWhatsAppTurks and Caicos, August 8, 2017 – Providenciales – The Ministry of Border Control and Employment advises the public that around 2:30 a.m. today Tuesday 08th August, 2017, an illegal migrant vessel with 53 Haitian nationals was intercepted in the area of West Caicos.The interception of this 35-foot vessel, was due to the collaboration of several agencies, in particular the United States Coast Guard, TCI’s Coastal Radar Station, the Marine Branch of the Royal Turks and Caicos Islands Police and private citizens. The Marine Branch confirmed the vessel as a sloop with 16 females and 37 males on board. At approximately 4:11 a.m. the sloop arrived in Providenciales where it was met by Immigration and other Task Force officials.The 53 illegal migrants are currently detained and are being processed for repatriation and entry on the Immigration Stop List. The last attempt of a sloop to enter the islands illegally was the interception of 99 persons on Monday 31st July, 2017, three persons were charged and the others repatriated.The Honourable Deputy Premier and Minister of Border Control and Employment, wishes again to remind persons of his Government’s commitment to improving the protection of our borders and tighter controls on immigration processes. Additionally, he stated that illegal migration threatens the lives and livelihood of our people and that persons found to be engaged in the smuggling of humans would be prosecuted under the law. He advises all persons to observe the immigration laws of the Turks and Caicos Islands as anyone found in breach of same will be dealt with accordingly.The Ministry of Border Control and Employment Services hereby extends its profound gratitude to persons in the community and all agencies who have assisted with this and other operations and initiatives, your contribution and support remains invaluable and critical to our success.Press Release: TCIG
For Jordan Rossiter, the game against Kilmarnock on Wednesday could be an opportunity to start in the Scottish Premier LeagueIn 2016, English midfielder Jordan Rossiter was bought by Scottish Premier League team Rangers.Before that, he spent two years in Liverpool in the English Premier League, but only played once.And now with the Scottish giants, he has only played in six games but expects a change to be in the starting eleven for the first time this season.“We all know how disappointing Sunday was and as the gaffer said we have a great group of lads here,” Rossiter told the club’s official website.
Johnston is disappointed after being injured Manuel R. Medina – September 11, 2019 Celtic winger Mikey Johnston was disappointed to miss Scotland Under 21 national team’s victories over San Marino and Croatia, and he hopes he can return to play soon.“We just have to go out tomorrow and take it out on Kilmarnock and hopefully go and get the three points.”“It has been a long road back to full recovery but it has been brilliant just to be back in with the lads and involved again on Sunday,” he added.“It was great to be out there on a big occasion but I know I have a long way to go myself to get back to my full match sharpness.”“There is no hiding it I have had a lot of setbacks in the few years I have been at Rangers but I am in a really good place now, physically and mentally,” he commented.“I just have to keep doing the right things on the pitch, as well as off it to make sure I stay available for the gaffer.”
Watch: Drone Captures Incredible View of Sheep on Colorado PeakGeek Pick: DJI RoboMaster S1 Is an Educational Land Drone Stay on target Your drone will need a dog tag: The U.S. government is now requiring all civilian drones to add external IDs due to safety concerns.On Tuesday, the Federal Aviation Administration (FAA) posted the regulation on a preview website for the Federal Register, Bloomberg reported. The regulation, which will go into effect on Feb. 23, aims to protect people from potentially concealed explosives and other hazardous incidents. Considering that there are more than one million drone users in the U.S., this regulation will help the FAA elevate safety and security.If you are attending @NASCAR Advance Auto Parts Clash today, be advised that there is a #NoDroneZone in effect within 3-nautical-miles of Daytona International Speedway from 2 pm until 5 pm ET. #FlySafe pic.twitter.com/FitH9UcoAr— The FAA (@FAANews) February 10, 2019The rule, which won’t be published until tomorrow, will give citizens a 30-day commitment period to respond to the updated ID requirement, The Verge reported. Moving forward, drone owners will have to externally display their drone registration numbers outside their devices. Previously, drone owners were allowed to place identification inside the devices’ battery compartments.Last month, the FAA proposed a framework that would enable expanded drone flights over large crowds and populated areas. However, flying a drone during major sporting events, including NASCAR races and football games, is strictly prohibited. Other companies, including Echodyne, a startup backed by Bill Gates, are also trying to help reduce illegal aircraft activity with their anti-drone radars.Visit FAA’s website for additional drone operation safety guidelines and tips.More on Geek.com: You May Soon Be Able to Fly Drones Over a Crowd, at NightFlights Grounded at Newark Airport After Two Drones Spotted Flying NearbyDronestagram Reveals Winners of Drone Photography Contest
More information: lists.w3.org/Archives/Public/p … ml/2012Feb/0274.htmldvcs.w3.org/hg/html-media/raw- … encrypted-media.html YouTube expands support for HTML5 (PhysOrg.com) — A draft proposal by Google, Microsoft and Netflix to introduce mechanisms for copy protection on web videos has generated strong opposition and a response that the proposal is “unethical.” Reaction has been strong against the powerful trio’s bid to see HTML5 carry digital rights management (DRM) tools. Explore further Citation: HTML5 spec editor slams Google & gang’s DRM bid (2012, February 25) retrieved 18 August 2019 from https://phys.org/news/2012-02-html5-spec-editor-slams-google.html
On the opposing side, developers and supporters of open systems argue that the very idea of adding DRM protection to video goes against the spirit of HTML5. “Any technology whose exclusive goal is to stop users from being able to make use of the content they have purchased is, in my opinion, unethical,” said Ian Hickson, HTML specification editor, in an interview with CNET. For Hickson, the Google-Microsoft-Netflix proposal is “just a plug-in platform in disguise.”The plan calls for proprietary plug-ins, called CDMs, or content decryption modules, which is not amenable to the open nature of HTML5, according to opposing arguments.The whole point of HTML5 is to move away from plug-ins; the introduction of such extensions, Hickson argued, would be tantamount to keeping plug-ins around.Specifically, Google, Microsoft and Netflix this week proposed a new web standard, in the form of the Encrypted Media Extensions proposal, and announced it on a W3C mailing list.The draft spells out a framework for bringing forth a system that manages protected content on the web browser. The proposed Encrypted Media Extensions standard would add a new set of API extensions for the HTMLMediaElement. The latter defines specialized properties and JavaScript methods available on HTML audio and video elements. These extensions would introduce DRM capabilities to HTML5-provided video.Whether some form of content protection is even necessary, leave alone ethical, is part of the present debate.Digital rights management permits only authorized video and audio. A solution to unauthorized copying has been seen in browser plug-ins for DRM protection. Hickson said he would rather see copyright law, not proprietary mechanisms, governing the use of video. He said there was no need for technology to protect content; the presence of copyright law was adequate.What next? Since the spec being proposed by the threesome is a draft, tech watchers see no guarantees that what the three propose will become an accepted standard, but at the same time there can be no guarantees that the debate will go south.Pressure to add some kind of DRM to HTML5 video is likely to continue, writes Scott Gilbertson in Webmonkey. “With Hickson very adamantly against it and Mozilla unlikely to support it in its current form, it’s not likely to move beyond the draft stage without some serious revisions.” © 2011 PhysOrg.com 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.
Artist’s impression of SS 433. Credit: NASA The only known supercritical accretor in the Milky Way galaxy is SS 433, a highly exotic eclipsing binary star system. Its primary object is likely a black hole. Its secondary companion is believed to be a late A-type star based on its light spectrum. The secondary in SS 433 is losing mass into an accretion disk as it spirals in toward the primary, which is slowly consuming it. In turn, as the accretion disc spirals in toward the primary, it becomes super-heated and emits intense X-rays. Physicists are fascinated by the exotic nature of SS 433, but also by its strong resemblance to ultraluminous X-ray sources (ULXs), which are astronomical sources of X-rays that are less luminous than the nuclei of active galaxies, but are more luminous than any known stellar process. These are sources of X-rays that exceed the Eddington luminosities of neutron stars and stellar black holes. Recently, a group of researchers from Russia and Japan have compared the optical spectra of ULXs to SS 433 and have determined that ULXs with X-ray luminosities of ~1040 erg S-1 must constitute a homogenous class of objects that most likely have SCADs. They have published their results in Nature Physics. The most popular models for ULXs have either intermediate mass black holes with standard accretion disks or stellar-mass black holes with accretion disk luminosity exceeding the Eddington limit. Based on X-ray data alone, it is not possible to distinguish these models, so the researchers have turned to optical spectroscopy to find unique information about ULXs. Using the 8.2 meter Subaru Telescope of the National Astronomical Observatory of Japan, located at the Mauna Kea Observatory on Hawaii, they obtained high-quality spectroscopic data from a number of ULX sources.They have determined that ULX spectra are quite similar to late nitrogen Wolf-Rayet stars (WNLs), which exhibit broad emissions of ionized nitrogen and helium or carbon. They have very high surface temperatures and produce intense stellar winds. The spectra from ULXs also resemble those of luminous blue variable stars (LBVs) in the compact stages of stellar development. Because the physical conditions of its disk wind may be similar to WNL stars, SS 433 also bears a strong resemblance to ULXs. The authors write, “Such spectra of high luminosities with prominent He II emission lines have never been observed from any stellar-mass black hole X-ray binaries, except for SS 433 and those having WNL donors [secondaries losing mass to the accretion disks of primaries in binary systems].” They exclude a number of stellar cases, including ULXs with WNL donors that exhibit stellar winds with the observed spectra. Wind terminal velocity is determined by surface gravity, making it difficult to explain the rapid variability of the He II line width in the recorded spectra. The authors conclude that SS 433 is intrinsically the same as ULXs, but is an extreme case with a particularly high mass accretion rate from its secondary, which accounts for the presence of its persistent jet outflows. © 2015 Phys.org Journal information: Nature Physics Explore further More information: “Supercritical accretion disks in ultraluminous X-ray sources and SS 433.” Nature Physics (2015) DOI: 10.1038/nphys3348AbstractThe black hole mass and accretion rate in ultraluminous X-ray sources (ULXs) in external galaxies, whose X-ray luminosities exceed those of the brightest black holes in our Galaxy by hundreds and thousands of times1, 2, is an unsolved problem. Here we report that all ULXs ever spectroscopically observed have almost the same optical spectra, apparently of WNL type (late nitrogen Wolf–Rayet stars) or LBV (luminous blue variables) in their hot state, which are very scarce stellar objects. We show that the spectra do not originate from WNL/LBV-type donors but from very hot winds from the accretion disks with nearly normal hydrogen content, which have similar physical conditions to the stellar winds from these stars. The optical spectra are similar to that of SS 433, the only known supercritical accretor in our Galaxy3, although the ULX spectra indicate a higher wind temperature. Our results suggest that ULXs with X-ray luminosities of ~1040 erg s−1 must constitute a homogeneous class of objects, which most likely have supercritical accretion disks.
Ultra-luminous X-ray sources in starburst galaxies (Phys.org)—Many black holes are believed to have surrounding accretion disks of matter trapped by gravity and spiraling toward the event horizon. Supercritical accretion disks (SCADs) are those with mass accretion rates exceeding the Eddington limit—this describes the maximum possible luminosity of an energetic body when the outward force of radiation is in equilibrium with gravitation. Masses that exceed the Eddington luminosity to produce SCADs emit extremely intense stellar winds from their outer layers. Citation: Researchers characterize mysterious ultraluminous X-ray sources (2015, June 9) retrieved 18 August 2019 from https://phys.org/news/2015-06-characterize-mysterious-ultraluminous-x-ray-sources.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.