Ten MLAs of the Sikkim Democratic Front (SDF) joined the BJP on Tuesday, making the latter the main Opposition party in the Sikkim, where it failed to win a single seat in the recent Assembly polls. The MLAs joined the BJP in the presence of its national general secretary Ram Madhav, who is in-charge of the party’s affairs in the northeast, and later met party working president J.P. Nadda.Mr. Madhav told reporters that the SDF had a strength of 13 MLAs and its legislature party had decided to merge with the BJP.The BJP is running governments as the main party or in alliance with regional parties in all the northeastern States except Sikkim. With this development, the BJP will become the principal Opposition party in Sikkim.The party won 15 seats while its rival, the Sikkim Krantikari Morcha (SKM), won 17 in the 32-member Assembly. Since two of the SDF MLAs had won from two seats, they resigned from one seat each, reducing the party’s strength to 13 in the House. The SDF was an NDA ally, but now the SKM has replaced it as a member of the BJP-headed North East Democratic Alliance.The MLAs who joined the BJP include Dorjee Tshering Lepcha, who has served as a Minister thrice in the Chamling government and is a five-term MLA, and three-term MLA Ugen Gyatso.Lone rangerThe SDF tried to put up a brave front saying that people of Sikkim were not used to national parties and one had to wait and watch to see how far this “new experiment” went.The SDF is now left with only one MLA —Mr. Chamling himself. “We are certainly facing the most challenging times,” SDF spokesperson P.D. Rai told The Hindu.(With inputs from Shiv Sahay Singh)
Don’t miss out on the latest news and information. The win gave Lyceum a 6-1 card to pace Group B while ousting the Bulldogs from further contention with a 2-3 record.Miguel Oczon led NU with 14 points while Dave Ildefonso and John Lloyd Clemente each scored 13.FEATURED STORIESSPORTSPrivate companies step in to help SEA Games hostingSPORTSPalace wants Cayetano’s PHISGOC Foundation probed over corruption chargesSPORTSSingapore latest to raise issue on SEA Games food, logistics“We weren’t really trying to take the top position of Group B,” said Lyceum coach Topex Robinson. “We’re just trying to improve every game.”Meanwhile, University of Santo Tomas ran roughshod over Mapua, 91-67, after dropping 12 triples on the Cardinals and forcing the enemy to 21 turnovers. Catholic schools seek legislated pay hike, too Cayetano: Senate, Drilon to be blamed for SEA Games mess View comments LATEST STORIES Trending Articles PLAY LIST 00:50Trending Articles02:11’Not just basketball’: Circumcisions, pageants at Philippine courts00:50Trending Articles02:42PH underwater hockey team aims to make waves in SEA Games01:44Philippines marks anniversary of massacre with calls for justice01:19Fire erupts in Barangay Tatalon in Quezon City01:07Trump talks impeachment while meeting NCAA athletes02:49World-class track facilities installed at NCC for SEA Games02:11Trump awards medals to Jon Voight, Alison Krauss ‘Rebel attack’ no cause for concern-PNP, AFP The Growling Tigers used a stifling press that had them breaking away from a 32-31 game at halftime to lead by as large as 30 points on the way to improving to 2-4.“This year, I have the players to implement what we want. But we are not yet there. We still have to work on a lot of things, but we are getting there,” said UST coach Aldin Ayo.Sports Related Videospowered by AdSparcRead Next Two-day strike in Bicol fails to cripple transport MOST READ Alvin Baetiong scores for Lyceum. CONTRIBUTED PHOTOLyceum of the Philippines showed National University the door in the Filoil Flying V Preseason Cup following a 71-68 victory Monday at the Filoil Flying V Centre in San Juan.Jaycee Marcelino and Ralph Tansingco led the Pirates, who played without African center Mike Nzeusseu, with 11 points each while Niño Ibañez added 10.ADVERTISEMENT DA eyes importing ‘galunggong’ anew Ethel Booba twits Mocha over 2 toilets in one cubicle at SEA Games venue Duterte wants probe of SEA Games mess Private companies step in to help SEA Games hosting Record 31 teams gun for Lakandula Cup
Championship Sunderland suspend Gibson after drink-driving charge Ryan Benson 19:45 18/3/2018 FacebookTwitterRedditcopy Getty Images Championship Sunderland The former Manchester United midfielder was charged with “driving with excess alcohol” after his involvement in a road traffic accident Championship strugglers Sunderland have announced that they have suspended midfielder Darron Gibson after he was charged for “driving with excess alcohol” on Saturday.Gibson, who came through the ranks at Manchester United and also played for Everton, was involved in a road traffic accident and later charged for being under the influence.The Republic of Ireland international had only recently been allowed back on the road following a 20-month driving ban for hitting a cyclist while driving, also with “excess alcohol” in his system on that occasion. Editors’ Picks Williams case shows Solskjaer isn’t holding Man Utd’s youngsters back – he’s protecting them Goalkeeper crisis! Walker to the rescue but City sweating on Ederson injury ahead of Liverpool clash Out of his depth! Emery on borrowed time after another abysmal Arsenal display Diving, tactical fouls & the emerging war of words between Guardiola & Klopp Gibson, 30, has played 15 times in the Championship this season, but is unlikely to feature again soon as Sunderland have opted to suspend him and investigate.Club statement regarding Darron Gibsonhttps://t.co/oYCdnc969p— Sunderland AFC (@SunderlandAFC) March 18, 2018Club chief executive Martin Blain said: “We expect the highest standard of behaviour from our players and should any individual fall short of those standards then robust action must be taken.”
TagsTransfersAbout the authorPaul VegasShare the loveHave your say Vitesse coach Slutsky: Today’s footballers should be grateful to Abramovichby Paul Vegasa month agoSend to a friendShare the loveVitesse Arnhem coach Leonid Slutsky says today’s footballers across Europe should be grateful to Roman Abramovich.Slutsky, who is close to the Russian billionaire, argues football’s wage explosion would not have happened without Abramovich buying Chelsea.He stated: “Abramovich is a revolutionary in world football.”All the young players of our time should say thanks to Roman Abramovich, who, by joining football, raised the salary level several times. “Now you will not surprise anyone with huge salaries, but Abramovich started everything.”Abramovich has owned Chelsea since the summer of 2003.
FSU FootballsFlorida State travels to Wake Forest this Saturday, and the game could be affected by the path of Hurricane Joaquin. At the very least, heavy rain could fall during the contest, and the Seminoles are preparing for the inclement conditions. Here’s a video courtesy of FSU beat writer Safid Deen showing the Seminole running backs working with wet footballs in anticipation of a downpour on Saturday. The balls get a quick dunk in a bucket of water before being used in the drill.FSU’s running backs working with wet footballs in preparation for Saturday’s game at Wake Forest. #Noles pic.twitter.com/tvkRuRavtE— Safid Deen (@Safid_Deen) October 1, 2015Can’t leave any stone unturned when getting ready to play.
New Delhi: Celebrating the success of Modi government’s one of the popular schemes – ‘Beti Bachao Beti Padhao’, Women and Child Development ministry felicitated on Friday five states and ten districts across the country for improving Sex Ratio at Birth (SRB) in five years.WCD minister Smriti Irani awarded the representatives, like District Commissioners for their commendable work in spreading awareness among the masses. Irani specifically hailed the performance of East Kamang in Arunachal Pradesh, which has shown a drastic change in sex ratio. In 2014-15, it was 807, which has now risen to 1039. Also Read – Uddhav bats for ‘Sena CM’Haryana, Uttarakhand, Delhi, Rajasthan and Uttar Pradesh have been conferred the award among states. Among the districts, Purvi Kawang in Arunachal Pradesh, Mahendragarh in Haryana, Udham Singh Nagar in Uttarakhand, Nammakal in Tamil Nadu, Bhiwani in Haryana, Jalgaon in Maharashtra, Ettawa in Uttar Pradesh, Raigarh in Chhattisgarh, Rewa in Madhya Pradesh and Jodhpur in Rajasthan have been awarded. There has been a 13-point improvement in the sex ratio from 918 in 2014-15 to 931 in 2018-19 and the states should aim to double it in the coming years, the minister added. Urging states to engage in convergent practices, Irani gave the example of Rajasthan’s Nagaur district, where a campaign called “coffee with collector” has been launched under which the district collector holds a conversation with villagers on improving sex ratio at birth. “Since the launch of Beti Bachao, Beti Padhao, central and state governments with Janbhagidari has consistently strived to ensure the potential of our daughters is celebrated. These efforts have led to the national improvement of 13 points in sex ratio at birth,” Irani said. Also Read – Farooq demands unconditional release of all detainees in J&KBesides, spreading for awareness about the scheme Tiruvallur in Tamil Nadu, Ahmedabad in Gujarat, Mandi in Himachal Pradesh, Kishtwar in Jammu and Kashmir, Gadag in Karnataka, Shimla in Himachal Pradesh, Wokha in Nagaland, Farukhabad in Uttar Pradesh, Sirmaur in Himachal Pradesh and Nagaur in Rajasthan have been awarded. While addressing the event, the Secretary of WCD ministry, Shankar Aggarwal said that the declining sex ratio is a matter of concern for the government. ‘Beti Bachao Beti Padhao’ scheme aims at securing the rights of the girl child, to be born, live with dignity and achieve her full potential. It is further a measure of gender justice. The scheme also aims to enable their education. Prime Minister Narendra Modi started the scheme during his maiden regime on January 22, 2015, from Panipat, Haryana. The scheme was initially started from 100 districts then have now expanded to all 640 districts. It aims to empower women, right from birth. It is a tri-ministerial scheme, where three ministries – Women and Child, Human Resource and Health Family Welfare provide impetus to the scheme. The junior WCD minister Debasree Chaudhuri was also present on this occasion.
NEW YORK, N.Y. – It might seem odd to review the new Apple TV streaming device — one specifically designed to display super-sharp video known as 4K — without actually owning a 4K TV.But in a way, that’s the point.Most people still don’t have 4K TVs, so the new Apple TV model doesn’t offer them much. But if you’re an Apple fan and already have 4K, the choice is clear. The new Apple TV 4K is out Friday starting at $179, or $30 more than the regular model. It’s a small difference compared with the price of your TV.It’s worth noting that alternatives to Apple TV are cheaper and equally capable at a basic level. All of the devices connect to a TV so you can stream most major video services on a big screen. Roku and Amazon have 4K models for less than $100 and non-4K versions for even less. Both are even ahead of Apple TV in being able to stream Amazon video now; it’s coming soon to Apple TV.But none of the rivals will play movies or shows purchased from Apple’s iTunes, at least without clunky workarounds. To watch those on a big screen directly, you need an Apple TV. And Apple has just sweetened the deal on that front.___THE FUTURE HAS ARRIVEDApple’s embrace of 4K is significant, despite the fact that Roku, Amazon and other rivals beat Apple to that milestone. Apple often waits until there’s broad enough appeal for new technologies. That time is now, given growth in sales of 4K TV and more movies and TV shows released in 4K formats.Parallel to that is the rise of high-dynamic range technology in television sets. HDR increases colour range and produces brighter whites and darker blacks. Better contrast means details in bright scenes aren’t washed out. Apple TV 4K supports HDR, too.___PATH TO UPGRADES4K is coming, just as high definition earlier replaced standard definition. The consulting company Futuresource says a third of TVs sold worldwide this year will be 4K capable, up from 25 per cent last year. But people tend to keep TVs for many years, unlike high-turnover phones.In demos with tech companies and visits to Best Buy, I find superior picture quality in 4K. Your couch needs to close enough to the screen to see the difference. My next TV will likely have 4K, but my 4-year-old Vizio HD TV still works fine (though I’m sure I just jinxed it).___ITUNES UPGRADES ITS VIDEO … AND YOURSMany Hollywood blockbusters now have 4K versions of home video releases. Netflix and Amazon are also trying to make their original shows available in 4K. But many indie and older titles remain in HD; even older shows like “The Wonder Years” are still stuck in standard definition.Fortunately, Apple isn’t making you choose now. If you buy something in HD through iTunes, you’ll automatically get the 4K version when it’s out. And if a 4K version is available now, it will cost the same as its HD counterpart. It’s never been clear why HD video is more expensive than SD when actors, directors and others behind the movies were paid the same.Lots of people were peeved at how the music industry tried to get them to repurchase the same songs on cassette tapes, CDs and then digital files. I have a collection of DVDs and don’t feel like paying again for higher-quality Blu-ray or digital versions.So Apple’s decision to treat 4K and HD the same is a good one. That only applies to iTunes, though. Netflix is charging extra for a plan that includes 4K, even when viewed on Apple TVs.A word of caution: While the new iPhone 8 and iPad Pros unveiled this past June will support HDR, they won’t display 4K. Even the upcoming iPhone X falls short in that respect.___BEYOND VIDEOThe new Apple TV gets a faster processor, which should make high-end games better to play. A new remote offers more precise motion control and a raised menu button to make it easier to orient yourself without looking. These features alone aren’t enough to justify an Apple TV 4K unless you’re a gamer. The non-4K version is getting the new remote, too. Picture quality is the same for both versions on regular HD sets like mine.In any case, Apple TV — with or without 4K — will be most useful if you’re already tied into Apple’s system with iDevices and iTunes. Given that rival devices are cheaper, what you’re buying isn’t the device, but an experience — integration and syncing with all your other Apple gadgets. For instance, 4K video taken on an iPhone will play easily on an Apple TV 4K.If you’re in that camp and are thinking of buying a new TV in the next few years, there’s a good chance it will be 4K, so you might as well choose the 4K version of Apple TV now. But if it’s longer, a better Apple TV will likely be out by then. The non-4K version will do just fine for now.
Citing the economic crisis and a need to focus on core products and services, Adobe has decided to discontinue its program to run Yahoo! ads alongside PDFs created by publishers. The program, announced last year, will officially end March 31. The ability for publishers to upload and ad-enable PDFs ceased January 16.The program had offered publishers a low-cost option for monetizing content digitally. Publishers could upload PDFs to Yahoo’s ad network where they were hosted, featuring contextual advertising in a panel to the right of the document. In a note to participating publishers, Adobe said hosted PDFs will revert to their original format without the ad panels after March 31.The program may have faced obstacles beyond the down economy, according to TechCrunch. “Unlike a Web site where advertisers at least have some sense of who the audience is, PDFs get passed around and downloaded willy-nilly,” blogger Erik Schonfeld wrote. “There is no good way to track who receives them, or who ultimately might click on those ads.”Participating publishers should expect to receive ad revenue payouts by May, Adobe said in the note.
Close IBTimes VideoRelated VideosMore videos Play VideoPauseMute0:13/0:51Loaded: 0%0:13Progress: 0%Stream TypeLIVE-0:38?Playback Rate1xChaptersChaptersDescriptionsdescriptions off, selectedSubtitlessubtitles settings, opens subtitles settings dialogsubtitles off, selectedAudio Trackdefault, selectedFullscreenThis is a modal window.Beginning of dialog window. Escape will cancel and close the window.TextColorWhiteBlackRedGreenBlueYellowMagentaCyanTransparencyOpaqueSemi-TransparentBackgroundColorBlackWhiteRedGreenBlueYellowMagentaCyanTransparencyOpaqueSemi-TransparentTransparentWindowColorBlackWhiteRedGreenBlueYellowMagentaCyanTransparencyTransparentSemi-TransparentOpaqueFont Size50%75%100%125%150%175%200%300%400%Text Edge StyleNoneRaisedDepressedUniformDropshadowFont FamilyProportional Sans-SerifMonospace Sans-SerifProportional SerifMonospace SerifCasualScriptSmall CapsReset restore all settings to the default valuesDoneClose Modal DialogEnd of dialog window. COPY LINKAD Loading … Mukesh Ambani helped his younger brother Anil Ambani to pay off debt owed to Sweden’s Ericsson It seems family comes first for Indian billionaires. In the latest instance of a billionaire rescuing a younger sibling, ArcelorMittal Chairman and Chief Executive Officer Lakshmi Niwas Mittal has helped younger brother Pramod Mittal clear a significant portion of 22.1-bln-rupee dues to State Trading Corp of India. The revelation comes just a week after Reliance Industries Chairman Mukesh Ambani helped sibling Anil Ambani pay 5.5 billion rupees to telecom gear maker Ericsson and avoid a possible jail term of three months.Even though the Mittal brothers had split the business in 1994, eldest brother Lakshmi Niwas chipped in with 16 billion rupees to help Pramod clear STC’s dues. “It’s true that Lakshmi stepped in to ensure there were no proceedings as a result of liabilities to STC. I believe there was a payment in November and another one in February. Family is very important to him (Lakshmi) so it’s not surprising he would help his brother out,” a friend of the billionaire told the Business Standard. Pramod is the middle brother and Vinod the youngest of the three Mittal brothers. Lakshmi Mittal, chief executive officer of ArcelorMittal.ReutersLakshmi Niwas Mittal controls the largest steel manufacturing company in the world—ArcelorMittal—with operations in 60 countries and revenues of over $76 billion. Recently, Mittal was ranked 91st on the Forbes Billionaires List with a net worth of around $13 billion.Case HistoryAfter Pramod and his firms cleared STC’s dues, the government-owned trading firm said it would not pursue any more winding up proceedings against Global Steel Holdings Ltd. The Enforcement Directorate had initiated various criminal proceedings against Pramod, GSHL, Global Steel Philippines Inc and Balasore Alloys and the Central Bureau of Investigation had filed an FIR in the case. The enforcement agency has quashed all proceedings against the firms and Pramod after dues were cleared.Pramod’s companies GSHL and GSPI had business relations with STC since 2003 but a slowdown in the global steel industry and the global economic crisis in 2008 led to the companies suffering huge losses. After the steelmakers failed to clear STC’s dues, the state-owned company had filed diverse proceedings against GSHL, GSPI, Pramod and some other people to recover the amount. Coils of steel are seen at an ArcelorMittal Factory in Florange, France, in this file photo. REUTERS/Vincent Kessler/File Photo”Pramod Mittal has paid and /or caused to be paid an aggregate sum of 22.1 billion rupees to STC, inclusive of the aforesaid 16.05 billion rupees as well as post-award interest, in full and final settlement of STC’s claim. In the circumstances, no amount is due and payable to STC by GSHL, GSPI or Pramod Mittal,” GSHL had said in a statement. As per the terms of the reconciliation agreement between STC and GSHL and GSPI, a sum of 16.1 billion rupees, inclusive of principal and interest at 13.5% per annum on US dollar benchmark rates was awarded to STC and was to be paid by the steel companies as principal debtors and Pramod Mittal as guarantor.
“So, we walk up to my bedroom, my sister and my niece, and I go, ‘I’ve been saving these for you,'” Zach revealed. Turns out the surprise didn’t go well because his niece certainly didn’t appreciate the gift. “The look on my niece’s face,” Galifianakis said, laughing. “She did not accept it, she was not into it at all, which I’m glad that she wasn’t.” We wonder what Mr Bieber has to say about all this.Currently, Bieber is in the middle of planning his second and official wedding with Hailey Baldwin. “Hailey is working with a planner,” the source revealed to PEOPLE earlier this month. “They are both excited.” On David Letterman’s Netflix show as Zach Galifianakis made his appearance, he explained how he once stole Canadian pop singer Justin Bieber’s underwear and wearing them! On My Next Guest Needs No Introduction, Galifianakis spoke about how he didn’t have an extra pair of underwear on him and hence did what had to be done.”We had a trailer for the guests and he was done with his,” the actor said. “So, I go to his trailer to get the stuff off me. He’s gone. Anyway, I didn’t have any underwear. I didn’t bring underwear, I brought pants and a shirt, but I forgot to bring extra underwear. I can’t wear this underwear.” The incident took place back in 2013 when the two celebrities filmed an episode of Galifianakis’ talk show, Between Two Ferns.Zach further added, “So, I see a pair of underwear in the corner,” with Letterman, 72, cutting in, “Assuming it belongs to Mr Bieber.” Galifianakis replied, “Well, I needed a pair of underwear. But the fact that it was his probably was more interesting. I put them on. Then I started thinking about it. A lot of levels, it’s wrong.” Turns out the actor retained the underwear for years because “I have nieces”. He basically planned on presenting his nieces with the singer’s underwear.
A man covers his head under the rain in Salalah, Oman on 25 May. Photo: APCyclone Mekunu blew into the Arabian Peninsula early Saturday, drenching arid Oman and Yemen with rain, cutting off power lines and leaving at least one dead and 40 missing, officials said.Portions of Salalah, Oman’s third-largest city, lost electricity as the cyclone made landfall. The Arabian Sea angrily churned Saturday morning, sending mounds of sea foam into the air. The waves ate into one tourist beach, pulling hunks of it away and toppling thatch umbrellas cemented into the sand.As Mekunu barreled overhead, the eye of the storm provided a moment’s respite. At one luxury hotel, which already had evacuated its guests, workers sat down early for a traditional “suhoor,” a meal Muslims eat before sunrise during the holy fasting month of Ramadan. They laughed and shared plates by flashlight in a darkened ballroom, the cyclone’s wind a dull roar behind their clatter.At least one person, a 12-year-old girl, died in Oman and 40 others are missing from the Yemeni island of Socotra, which earlier took the storm’s brunt, police said. Yemenis, Indians and Sudanese were among those missing on the Arabian Sea isle and officials feared some may be dead.India’s Meteorological Department said the storm packed maximum sustained winds of 170-180 kilometres (105-111 miles) per hour with gusts of up to 200 kph (124 mph). It called the cyclone “extremely severe.”Many holidaymakers fled the storm Thursday night before Salalah International Airport closed. The Port of Salalah – a key gateway for the country – also closed, its cranes secured against the pounding rain.Omani forecasters warned Salalah and the surrounding area would get at least 200 millimetres (7.87 inches) of rain, over twice the amount of downfall this city typically gets in a year. Authorities remained worried about flash flooding in the area’s valleys and potential mudslides down its nearby cloud-shrouded mountains.Workers take a rest in a school turned into a shelter in Salalah, Oman on 25 May. Photo: APA sizable police presence fanned out across the city, the hometown of Oman’s long time ruler Sultan Qaboos bin Said. Many officers rode in Royal Oman Police SUVs with chicken wire over the windows, likely because their other vehicles weren’t tall enough to manoeuvre through the floodwater.“Of course, for the citizen there is going to be a sense of fear of the consequences that can happen,” said brigadier general Mohsin bin Ahmed al-Abri, the commander of Dhofar governorate’s police. “We have been through a few similar cases and there were losses in properties and also in human life as well. But one has to take precautions and work on that basis.”As torrential rains poured down on Friday, authorities opened schools to shelter those whose homes are at risk. About 600 people, mostly labourers, huddled at the West Salalah School, some sleeping on mattresses on the floors of classrooms, where math and English lesson posters hung on the walls.Shahid Kazmi, a worker from Pakistan’s Kashmir region, told The Associated Press that police moved him and others to the school. He said he was a bit scared added: “Inshallah (God willing), we are safe here.”On Socotra, authorities relocated over 230 families to sturdier buildings and other areas, including those more inland and in the island’s mountains, Yemeni security officials said.Flash floods engulfed Socotra streets, cutting electricity and communication lines. Some humanitarian aid from Saudi Arabia and the United Arab Emirates arrived on the island just hours after the cyclone receded.Socotra governor Ramzy Mahrous said one ship sank and two others ran aground in the storm, initially saying authorities believed 17 people were missing and presumed dead.Yemen’s self-exiled president Abed Rabbo Mansour Hadi issued a statement ordering troops under his command on the island to help citizens deliver supplies and reopen roads.The island, listed by UNESCO as a World Heritage Site, has been the focus of a dispute between the UAE and Yemen’s internationally recognized government amid that country’s war after Shiite rebels, known as Houthis, seized the Yemeni capital, Sanaa.Socotra has a unique ecosystem and is home to rare plants, snails and reptiles that can be found nowhere else on the planet.
Ram AwtarPakistan has again proved that it cannot be trusted, a top Border Security Force (BSF) official said on Sunday.”Pakistan has yet again proved that it cannot be trusted as its forces resorted to unprovoked shelling and firing to target villages along the international border,” said Ram Awtar, Inspector General (IG) BSF Jammu Frontier.He was addressing the media on the sidelines of the wreath-laying ceremony to honour the two BSF troopers killed in Pakistani firing on Sunday.”We know Pakistan never keeps its word. It is not reliable and trustworthy and even after the DGMOs agreed to respect the (2003) ceasefire, Pakistan on Sunday morning fired in Pargwal and Kanachak areas.”The BSF official said the killing was not a sniper action but a blatant ceasefire violation.”We have given a strong and befitting reply, but so far the damage across the border could not be ascertained. We did not target civilian areas. We only retaliated to cross border firing,” he said.
In addition to performing dynamic studies on the cloaks described in the paper, the scientists are now searching for new ways to cloak, as well as a method for introducing the cloaking concept into additional dimensions. “Our approach can help design strong materials in complex shapes without losing the performance of the initial material. We hope to use this approach in the engineering sciences to find a way to design complex architectures in a lightweight fashion – specifically in civil engineering and the automotive industry, where low weight and strong lattice-based materials will be, and in fact already are, a key future technology. For example,” Bückmann illustrates, “think about a door in a carbon-enforced car. Here one would directly find the right fiber directions to enforce the opening in the car without losing the car’s overall stiffness.” Journal information: Proceedings of the National Academy of Sciences Citation: Occam’s razor redux: A simple mathematical approach to designing mechanical invisibility cloaks (2015, May 1) retrieved 18 August 2019 from https://phys.org/news/2015-05-occam-razor-redux-simple-mathematical.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. © 2015 Phys.org Measured performance of a lattice-transformation cloak. Same as Fig. 2, but measured directly on polymer structures fabricated by a 3D printer. Photographs of the structures are shown in the left-hand-side column. Again, the large distortions introduced by the hole in the homogeneous lattice are dramatically reduced in presence of the cloak, i.e., the average relative error with respect to the reference case, Δ, decreases from 714% to 26% in good agreement with theory shown in Fig. 2. Parameters are: r1 =30 mm, r2 =60 mm, L=4 mm, a = √3 × L, w =0.4 mm, and W =1 mm. Credit: Bückmann T, Kadic M, Schittny R, Wegener M (2015) Mechanical cloak design by direct lattice transformation, Proc Natl Acad Sci USA 112(16):4930-4934. An interesting limitation to the new approach – which is applied to the cloaking of a void in a lattice material – is that cloaking will never be perfect. “This is rather a general statement, as one needs to keep in mind that a perfect cloak is directly linked to material parameters that diverge,” Bückmann tells Phys.org. “This means if one would like to cloak an object, infinite materials parameters occur, such as an infinite mass at the inner cloaking radius – and this cannot be fulfilled in an actual experiment. One needs thus to consider how well an actual cloak performs, that is, Am I able to detect the imperfections, or do I care at all about them? This in turn depends on the problem one needs to solve, and cannot be answered in general.” In short, mathematically perfect cloaking is unavoidably connected with singular material parameters that just cannot be achieved in reality. More information: Mechanical cloak design by direct lattice transformation, Proceedings of the National Academy of Sciences (2015) 112(16):4930-4934, doi:10.1073/pnas.1501240112Related:1An elasto-mechanical unfeelability cloak made of pentamode metamaterials, Nature Communications (2014) 5:4130, doi:10.1038/ncomms5130 Images of samples and setup. Photographs of fabricated samples in the measurement setup including the Hooke’s springs that approximate constant pressure on the left- and right-hand side. From Upper to Lower: reference sample, sample with hole, and cloaking structure. Parameters are as in Figs. 2 and 5, i.e., r1 =30 mm, r2 =60 mm, L=4 mm, a = √3 × L, w =0.4 mm, and W =1 mm. Credit: Bückmann T, Kadic M, Schittny R, Wegener M (2015) Mechanical cloak design by direct lattice transformation, Proc Natl Acad Sci USA 112(16):4930-4934. Researcher Tiemo Bückmann discussed the paper he and his colleagues published in Proceedings of the National Academy of Sciences, as well as the challenges they faced in developing their concept and conducting the resulting research. “The main challenge in devising our approach – that is, of directly transforming the lattice points of a 2D discrete lattice composed of a single constituent material while keeping the properties of the elements connecting the lattice unchanged – was actually to come up the concept and think about realizing it,” Bückmann tells Phys.org. “At first, we just used that concept as an example to illustrate the basic concepts of cloaking, since it was taking us quite some time to really think about realizing such a structure out of one material – but this then worked so nicely that it was surprising even to us.”Another issue: cloaking a void in an effective elastic material with respect to static uniaxial compression as an example of elastic–solid mechanics. “Our main problem here was, first of all, that the mathematical background for a material parameter transformation is extremely complex,” Bückmann notes. “This makes the design of such a cloak highly complex as well as extremely demanding on materials and their effective properties.” That said, the scientists found that these problems were all solved by their straightforward approach of simply transforming the lattice points rather than effective material properties. “This simplified the cloaking concept enormously, making it possible for us to create a cloak along these lines.” Direct lattice-transformation approach. (A) A hexagonal lattice with lattice constant a composed of identical Ohmic resistors with resistance R. The lumped resistors (upper half) can equivalently be replaced by double-trapezoidal conductive elements (lower half) with length L=a/√3 and widths w and W as defined in the magnifying glass. (B) The lattice points (black dots) of the lattice in A are subject to a coordinate transformation. To keep the resistors R identical, while locally changing the length from L to L’ and fixing w, the width W is changed to W’ as indicated in the magnifying glass. One can proceed equivalently in heat conduction, particle diffusion, electrostatics, and magnetostatics. For elastic solids in mechanics, the resistors can be replaced by linear Hooke’s springs. The width W in the corresponding microstructure is again adjusted to W’ to keep the Hooke’s spring constant D identical while changing the length from L to L’ and fixing w. Credit: Bückmann T, Kadic M, Schittny R, Wegener M (2015) Mechanical cloak design by direct lattice transformation, Proc Natl Acad Sci USA 112(16):4930-4934. Mechanical cloaks of invisibility—without complicated mathematics Explore further Calculated performance of a lattice-transformation cloak. Constant pressure is exerted from the left- and right-hand side in each case. We compare the response of a homogeneous reference lattice (first row), the same finite lattice with a hole of radius r1 in the middle (second row), and the elastic cloak with inner radius r1 and outer radius r2 (third row) designed by direct lattice transformation. The (von Mises) stress is shown in the left column, the x component of the strain at the lattice points in the middle column, and the y component of the strain at the lattice points in the right column. We use a highly saturated false-color representation to exhibit all data on the same scale. The metamaterial structures (cf. Fig. 1) are shown underneath. The corresponding average relative error Δ of the strain vectors outside the cloak (i.e., for radii r >r2) with respect to the reference case is given on the right-hand side. The hole in the reference leads to large strains at the inner radius as well as outside of the cloak. Both aspects are dramatically improved by the cloak, Δ decreases by a factor of 34 from 738% to 22%. Parameters are: r1 =30mm, r2 =60mm, L=4 mm, a= √3 × L, w =0.4mm, and W =1mm. Credit: Bückmann T, Kadic M, Schittny R, Wegener M (2015) Mechanical cloak design by direct lattice transformation, Proc Natl Acad Sci USA 112(16):4930-4934. , Nature Communications Metamaterials – engineered materials with properties not found in nature – have led to an astounding range of optical, acoustic, thermodynamic, two-dimensional solid mechanics, and other types of invisibility cloaks that render the cloaked object indistinguishable from the environment around them – but the ability to cloak three-dimensional solid mechanics has proven elusive. (Solid mechanics is the branch of continuum mechanics – which models materials as a continuous mass rather than as discrete particles – that studies the behavior of solid materials, especially their motion and deformation under the action of forces, temperature changes, phase changes, and other external or internal agents.) Recently, however, scientists at Karlsruhe Institute of Technology, Germany – following their design last year of a so-called unfeelability cloak1 that hides (at this point small) 3D objects such that they cannot be physically detected – have demonstrated a surprisingly simple and generalizable approach in which a coordinate transformation – a mathematical process of obtaining a modified set of coordinates by performing some nonsingular operation on the coordinate axes, such as rotating or translating them – is mapped directly onto a concrete one-component microstructure. In addition, the researchers have successfully applied the technique to static elastic–solid mechanics (the elastic and plastic behavior of solid objects subject to stresses and strains) to a material made of printed polymer. In showing that the approach works in various areas, the researchers evaluated the main concepts of cloaking based on a lattice material, considering only static measurements. “Within these fields, Bückmann notes, “one can cloak in general any kind of physical problem that is linked to the same equations. A few examples in addition to mechanics, as presented in our paper,” he illustrates, “are current conduction, heat conduction, electrostatic potential, magnetostatics, and diffusion.” To underscore the effectiveness of their approach, Bückmann points out that while there were slight differences in the areas tested, in general – depending on the transformation and the given loading conditions – all simulations performed showed a relevant improvement over the case prior to our applying our transformation. “As one tries to cloak a larger and larger hole, or void, in a very thin cloaking shell,” he explains, “the performance of course decreases.” A third obstacle was comparing the average relative standard deviation of the strain vectors outside of the cloaked void with respect to the homogeneous reference lattice as a way of quantifying cloaking quality. “We thought about a way of quantifying the performance of our cloak, and so searched for a good quantity that is actually sensitive and, at the same time, representative for the performance of a cloak. We came up with the differences as a standard deviation between two samples.”Bückmann tells Phys.org that two insights were key to addressing these challenges. “First of all, we found the general concept of a lattice transformation cloak, which is applicable to many different physical quantities. Furthermore, we discovered that the concept also works in mechanics – one of the most demanding fields of physics with regard to cloaking.” This general concept is easy to understand, he points out, and therefore will hopefully help design a range of structures and solve problems in mechanical and engineering science.
Categories: Albert News,News 14Jun Michigan House committee approves school employee retirement reforms A state House committee today approved legislation to help improve the future finances of Michigan’s public schools by fixing a broken school employee retirement system.The legislation sponsored by Rep. Thomas Albert of Lowell provides an enhanced 401k-style plan for current and new public school employees. It also gives employees an annuity option through the 401k-style plan, if they desire a guaranteed portion of retirement income. The plan will give new school employees more control and freedom to manage their own retirement savings because the money will follow them throughout their careers, even if they change jobs or professions.New school employees will have the option of selecting a revised hybrid plan – with elements of a 401k and a pension — that is more stable, predictable and less risky than the current version. The current hybrid plan created in 2010 will be closed to new entrants.The plan keeps a promise to Michigan’s retired and current school employees, whose benefits don’t change – with one notable and positive exception. Current school employees who already have opted for a 401k plan will get the new, more lucrative defined contribution plan along with new hires.“Today is an exciting day for the future of Michigan,” said Albert, who worked as an investor for the state pension system before his election to the Legislature. “This bill gives new hires control of their own financial future, protects the Michigan taxpayer from a growing liability, and helps move toward focusing school spending on education — and not services rendered decades ago.“This proposal is one giant step in the right direction for our school system,” Albert said. “Our schools are drowning in debt, with more than a third of school funding going to pension liabilities. We can shore up this system and get out of this hole dug over the past several decades. But we’ve got to act now, make tough decisions and do the right thing.”The legislation affecting the Michigan Public School Employees Retirement System advances to the House floor after its approval by the House Education Reform Committee.Michigan’s public school employee pension and retiree health care system is buried in debt, with an unfunded liability approaching $40 billion – including $29 billion on the pension side alone. The debt costs the state and local schools nearly $2,000 per student annually, and the debt has been rising each year.“The debt has hurt teacher salaries and taken resources out of the classroom that would be far better spent directly educating our children,” Albert said. “The state’s previous attempts to fix the system have not gone far enough. It’s time to make real change, with real numbers and real certainty.” ###The legislation is House Bill 4647.