29 Sep

The Case For LeBron James MVP

But volume isn’t everything. Westbrook and Harden are having historic offensive seasons, but James has them beat on efficiency (while being only a hair behind in volume). James’s true shooting percentage is higher than both Harden’s and Westbrook’s, and LeBron generates more points per potential assist than the two.3An NBA player-tracking statistic that covers all passes that lead to a shooting foul, generate an assist or would generate an assist if the shot were made. Through April 10Source: NBA LeBron James26.422.749.1 James Harden29.127.256.3 Through April 10Source: NBA And then there’s the other side of the ball, where only Leonard rivals James. Harden’s defense generally falls on the wrong side of average, often to a comical degree. Westbrook racks up his share of rebounds and steals, but the consensus is that he’s nowhere near elite. And Curry is the soft spot in the Warriors’ defense despite having made great strides. That leaves LeBron and Leonard — and while Kawhi has won the last two defensive player of the year awards, ESPN’s Real Plus-Minus estimates that LeBron’s defensive impact has been nearly twice as great this season.4Leonard’s wonky defensive metrics have been the subject of much discussion this year, and should likely be taken with a grain of salt because Kawhi may be suffering from the random noise of unexpectedly hot opponent shooting from the free throw line and on 3-pointers.So there’s a statistical case for LeBron as MVP — both offensively and defensively. But the MVP award isn’t an objective one — there’s no agreed-upon definition of value. And that means voters’ decisions often come down to the narratives that wrap around the numbers. The 1961-62 MVP award, for example, didn’t go to Oscar Robertson and his season-long triple-double, nor did it go to Wilt Chamberlain and his 50.4 points and 25.7 rebounds per game. The winner was Bill Russell — who had lesser, albeit still eye-popping, numbers — because leading the Boston Celtics to the league’s best record and top defense proved more compelling.And it’s in this category of narrative that LeBron suffers the most by comparison. His Cavaliers have slid in the second half of the season, dragged down by atrocious defensive performances. He isn’t breaking any records. At 32 years old and with 14 seasons and an absurd numbers of minutes behind him, LeBron is “only” as good as he’s ever been. But that might make him the best two-way player in the NBA this season. His story just happens to be a rerun in syndication, an episode we’ve seen a half-dozen times before.So, forget the numbers.The MVP argument for LeBron goes something like this: Measure the man against himself. If you watched LeBron carry the Cavaliers back from the brink in last year’s NBA Finals, you know he’s the best player in the NBA, full stop. Nothing he’s done, or not done, this season has changed that basic fact. Look past the glitter of round numbers and records broken. LeBron James is your MVP. Stephen Curry1.3662.5% PLAYERPOINTS PER POTENTIAL ASSISTTRUE SHOOTING PERCENTAGE Kawhi Leonard25.78.934.6 PER GAME Greatness is often easier to recognize when it looks like nothing we’ve seen before.To a large degree, this is the MVP case for Russell Westbrook, James Harden and Kawhi Leonard: The first shoulders offensive responsibility to a previously unimagined degree, piling up counting stats at a historic pace. The second leans into the hyper-efficient idiosyncrasies of his game and leads one of the most extreme and extremely efficient offenses we’ve ever seen. The third has blossomed from a defensive stopper into a two-way superstar, one of the most efficient volume scorers in the league. Each is an MVP candidate not only because he played phenomenal basketball this season but also because he is so unlike recent MVP winners.And then there is LeBron James.Statistically speaking, LeBron has been at least as productive as the rest of that group, among the other elites in any metric chosen. But he’s been so good for so long that an incredible season doesn’t stand out. For LeBron, the incredible has become mundane.This is the third entry in our series making the case for five NBA MVP candidates. We’ve also made the case for James Harden and the case for Kawhi Leonard. Still to come: Stephen Curry and Russell Westbrook. Also, check out our NBA predictions.Much of the MVP conversation, for better or worse, is likely to center on volume. That’s what happens when one candidate is averaging a triple-double and another threatened to lead the league in both scoring and assists. James’s averages — 26.4 points, 8.7 assists and 8.6 rebounds per game1All stats in this piece are current through April 10. — are not as flashy as Westbrook’s or Harden’s, but he’ll join them, Oscar Robertson and Michael Jordan as the only players to average 26, 8 and 8 across a full season. So James isn’t that far behind Westbrook and Harden in how much offense he creates — and he has a sizable advantage on Curry and Leonard. We can see this by adding up the points each player scored and those he created for teammates with assists2Courtesy of the NBA’s player tracking statistics.: PLAYERPOINTS SCOREDPOINTS CREATED BY ASSISTTOTAL POINTS CREATED LeBron James1.3661.9 Russell Westbrook31.923.855.7 Kawhi Leonard1.2961.2 James Harden1.2761.2 Russell Westbrook1.2155.5 LeBron is more efficient than Westbrook or Harden Stephen Curry25.415.540.9 LeBron generates more offensive volume than Curry or Leonard read more

5 Sep

Budget 2015 3yr FDs could get Tax Exemption Financial Institutions Call for

first_imgReutersThe upcoming Budget 2015 could see the Narendra Modi government making fixed deposits of three years and above tax-free against the current five-year term, in a bid to bring term deposits on par with mutual funds and tax-free bonds, which have seen a large number of investors. In a pre-budget meeting with Finance Minister Arun Jaitley, senior bank executives and heads of financial institutions recommended the introduction of corporate tax slabs, in the lines of individual taxation.The banking industry reportedly strongly supports the idea of fixed deposits of lower maturity being considered for tax-free status. In the recent past, mutual funds have been able to draw many customers, thanks to the three-year lock-in period, making the financial instruments more attractive to the common man.However, banking officials want a level playing field, and fixed deposits allow the cost of funds to be brought down. Tax rebates under Section 80C are inconsistent in their minimum lock-in periods, with investments in public provident funds account being locked-in for 15 years, while the national savings certificate has a six-year lock-in period, and three-years for equity linked savings scheme (ELSS.)As a percentage of gross domestic spending, financial saving has slipped by 10 basis points to 1.7% in 2012-13, with gross domestic savings too witnessing a more significant 1.2% fall to 30.1%, for the same period, according to EconomicTimes.Currently, investments up to ₹1.5 lakh in post office savings schemes, bank deposits, principal on home loan, public provident fund and life insurance are exempted from tax.last_img read more

5 Sep

Issue of sovereign gold bond postponed to November 30

first_imgThe issue date of the first tranche of Sovereign Gold Bond scheme has been extended by four days to November 30 to enable their proper processing, the government announced on Wednesday.A finance ministry statement said a large number of applications has been received by banks and post offices, and “to enable smooth uploading of applications into RBI’s E-kuber system, particularly by the post offices, it has since been decided to shift the issue date of the Sovereign Gold Bonds from November 26, 2015 to November 30, 2015”.Subscription for the sovereign gold bonds, announced by Finance Minister Arun Jaitley in the 2015-16 budget as a financial asset serving as an alternative to the precious metal, was open from November 5 to 20.The finance ministry announced last month that the bonds, issued by the Reserve Bank of India on its behalf, would be sold through banks and notified post offices.The scheme, so far, has generated lukewarm response, with bankers pegging the overall collections at Rs.150 crore. This, according to banks, is owing to a higher issue price, which the RBI had set at Rs.2,684 per gram, while the ruling market price was lower.The gold bonds are denominated in multiples of gram(s) of gold with a basic unit of one gram while the minimum investment limit is two grams and the maximum subscription is 500 grams per person per fiscal. For joint holders, the limit will be applied on the first holder.As per the scheme, the gold bonds will be sold only to resident Indian entities including individuals, Hindu undivided families, trusts, universities, and charitable institutions.The issue and redemption price are in Indian rupees fixed on the basis of the previous week’s (Monday-Friday) simple average of closing price of gold of 999 purity published by the India Bullion and Jewellers Association Ltd.The bond tenure will be eight years with exit option beginning the fifth year onwards. The bonds will also be tradable in the bourses.The rate of interest will be 2.75 percent per annum payable semi-annually on the initial value of investment.Bonds can be used as collateral for loans. The loan-to-value (LTV) ratio is to be set equal to ordinary gold loan mandated by the RBI from time to time.As to the tax treatment, interest on gold bonds will be taxable as per the provision of Income Tax Act, 1961 and the capital gains tax shall also remain same as in the case of physical gold.last_img read more

3 Sep

SC accepts lower court judges disciplinary rules

first_imgSupreme CourtThe Appellate Division of the Supreme Court on Wednesday accepted the gazette notification on the disciplinary rules for lower court judges, reports UNB.A five-member Appellate Division bench, led by acting chief justice Abdul Wahhab Miah, granted the disciplinary rules citing that the government issued the gazette giving primacy to the opinions of the apex court at every stage.Some media outlets are making unnecessary comments on gazette notification without reading it, the apex court observed.Earlier, attorney general Mahbubey Alam read out the gazette on judges’ disciplinary rules before the Appellate Division bench.On 11 December last, the government issued the gazette notification.Later, on 13 December, the SC fixed 3 January (today) for an order on the notification.The lower judiciary was officially separated in November 2007 but the disciplinary rules for lower court judges had not been formulated.On 2 December 1999, the Supreme Court in the Masdar Hossain case issued a seven-point directive, including formulating separate disciplinary rules, for the lower court judges.The law ministry on 7 May 2015 sent a draft of the rules to the Supreme Court which was similar to the Government Servants (Discipline and Appeal) Rules 1985.last_img read more

3 Sep

Nobel peace laureate Tawakkol Karman to address AUW

first_imgTawakkol KarmanTawakkol Karman, Nobel peace prize winner from Yemen will address Asian University for Women in Chattogram in May, reports Times of Oman.Karman, an activist, journalist and politician will give the keynote address during the Sixth Commencement Ceremony of AUW on 12 May, 2018, adds the English-language daily of Oman.Karman is the first Arab and second Muslim woman to win a Nobel peace prize. At the time of receiving the award, Karman was also the youngest person to ever receive it.Two hundred women are expected to graduate from AUW on the occasion. AUW will also honour Ismail Serageldin, founding director of the Bibliotheca Alexandrina, Egypt with a doctorate of arts, honoris causa, according to Times of Oman.“In order for women to play active roles in society and be able to overcome policies that marginalise and weaken them, their education and qualification are an unavoidable option,” said Tawakkol Karman.“AUW is deeply honoured that Nobel peace prize laureate Tawakkol Karman will share her insights and outstanding efforts toward advancing human rights in Yemen at the Sixth Commencement Ceremony.“I am confident that the exceptional young women graduating on that day will be emboldened by such a courageous role model,” said vice chancellor of AUW, professor Nirmala Rao.last_img read more

3 Sep

Voting ends amid violence 13 killed

first_imgMiscreants snatch a ballot box from the voting centre at Shohagpur Dakhin Government Primary School at Ashuganj in Brahmanbaria-2 constituency. Later two youths recovered the ballot box and brought it back to the polling station. Photo: Shahadat HossainVoting in the 11th national election concluded at 4pm on Sunday amid allegations of irregularities, including overnight stuffing of ballot boxes and capturing of polling stations, and violence in different parts of the country, leaving 13 people dead, reports UNB.In Noakhali, Nurun Nabi, an Ansar member, was shot dead by some miscreants at Tulachara Primary School polling station of Noakhali-3 constituency, said presiding officer professor Suchon Chowdhury.In Chattogram, Ahmed Kabir, 45, an activist of Jatiya Party, was killed in a clash between Awami League and Jatiya Party activists in Banskhali upazila early in the morning.In Rangamati, Bashir Uddin, general secretary of Kashkhali union Jubo League unit, was killed in an attack allegedly by some BNP activists at Kashkhali union in Kaukhali upazila in the morning.In Cumilla, Bachchu Mia, 35, a resident of Sundial village in Nangalkot upazila, was killed in a clash between the supporters of AL and BNP in the morning, said district police special branch sub-inspector Mahbub Morshed.Besides, a rickshaw-puller, Muzibur Rahman, 35, son of Sujat Ali of Muradnagar village of the upazila, was killed in a clash between ruling Awami League and BNP men at Paschim Belashwar village in Chandian upazila.In Rajshahi, Merajul Islam, 30, son of late Abdus Sattar and an Awami League supporter, was killed in a clash between BNP and AL men in Pakuria Government High School centre in Jahanabad union of Mohanpur upazila around 11am over capturing a polling centre of Rajshahi-3 constituency, said Rajshahi district police superintendent Shahidullah.Besides, Modasser Ali, 40, organising secretary of Awami League No-8 ward in Panchandar union of Tanore upazila, was killed in a clash between BNP and Awami League men over capturing Mohammadpur High School polling station of Rajshahi-1 constituency, said officer-in-charge Rezaul Islam of Tanore police station.In Tangail, police recovered the body of BNP ward unit president Abdul Aziz, 65, who remained missing since Saturday from Nagda Shimla area in Gopalpur upazila.In Natore, Hussain Ali, an Awami League supporter, was stabbed to death by his nephew Ratan Fakir following an altercation over casting vote at Samskholsi village in Naldanga upazila.In Narsingdi, Milon Miah, 35, an Awami League polling agent, was hacked and slaughtered allegedly by supporters of opposition (independent) candidate at Kundarpara Primary School centre of Shibpur of Narsingdi-3 constituency around 12:30am, said Abul Kalam Azad, officer-in-charge of Shibpur police station.In Bogura, Awami League activist Azizul Islam, 30, was killed and five others injured in a clash between AL and BNP activists at Bagil polling station in Kahalu upazila around 11:3am over capturing polling station, said Paikor union parishad chairman Mitu Chowdhury.In Brahmanbaria, Israil, 19, son of Sayedul Islam of Rajghar village in Sadar upazila, was shot dead and three others suffered bullet wounds ‘in police firing’ during a clash between supporters of AL and BNP at Rajghar Government Primary School polling centre of Brahmanbaria-3 constituency.In Cox’s Bazar, Abdullah Al Faruque, 25, son of Abul Kalam of Rajakhali union in Pekua upazila, was killed in a clash between BNP and AL men in Rajakhali Government Primary School polling station of Cox’s Bazar-1 constituency around 10am, said Tanzir Hossain, officer-in-charge Pekua police station.Voting was suspended at Sharifpur Primary School centre of Begumganj upazila under Noakhali-3 constituency and Nawabpur Government Primary School centre under Noakhali-1 in the early morning as miscreants snatched ballots and election materials from there.In Satkhira, four people were injured in a clash between BNP and Awami League supporters in Dhalbaria polling station in Satkhira-2 constituency in Sadar upazila around 10am.In the capital, BNP candidate for Dhaka-4 constituency Md Salahuddin Ahmed was hacked allegedly by ruling party activists when he went to cast his vote at Shyampur Model High School voting centre in the morning.Meanwhile, 22 Jatiya Oikya Front candidates and one independent contestant have announced to boycott the election, citing various irregularities, including vote rigging and capturing of polling stations by ruling party men.They made the announcement halfway through as they alleged that ruling party men captured polling stations, rigged votes and barred voters from casting votes in their constituencies.Situation in capitalGrand Alliance candidate Rashed Khan Menon, BNP candidate Mirza Abbas and Md Eunus Ali Akando of Jatiya Party are contesting the election from the Dhaka-8 parliamentary seat.However, no Jatiya Oikya Front supporters were seen around these polling centres though few supporters of the JaPa candidate were seen. Female voters’ presence was remarkable until 9:30am.”I’m so happy to cast my vote without any fear. I hope this peaceful environment will prevail till the end,” Nishat Tasnuva, a first-time voter, told UNB after casting her vote at Shantinagar Ideal School centre.The presence of voters at Mirza Abbas Mohila Degree College in the city’s Shahjahanpur area was huge. Some voters said they faced difficulties in finding out their exact polling booths to cast their votes due to the absence of representatives of candidates who were supposed to guide the voters.Presiding officer at Mahbub Ali Institute in Shahjahanpur Ashiqul Islam told UNB that some 35 per cent votes were cast by 12pm. “Law enforcement agencies are very active. I hope this peaceful environment will remain until the end of voting.”Ainul Kabir, presiding officer at Siddheswari Boys’ Higher Secondary School centre in the city, told UNB that they did not receive any complaint from anybody and voters cast their votes with much enthusiasm.Visiting MDC Model Institute in Mirpur, the UNB correspondent found that there was no agent of BNP in the polling centre.When a BNP agent tried to enter the polling station, Awami League supporters chased him. As the BNP agent took shelter in a club of Agrani Kalyan Samiti, the AL supporters beat him up.The AL men also snatched a mobile phone of a reporter as he took photo of the incident, said witnesses.At Ekramunnesa Degree College centre which is an all-female one, voter presence was satisfactory, said Ahsan Ullah, presiding officer of the centre.”Around 300-400 votes have been cast here since morning,” he said.Iqra Bangladesh School and College, another nearby centre, saw voter turnout of above 20 per cent in the morning.Anisur Rahman, presiding officer of the centre, said, “Overall voting has been peaceful so far, I pray for remaining till the end.”South Point School and College had an impressive turnout since morning similar to previous centres.A UNB correspondent found no agent of BNP in any of the centres while visiting those.The turnout of voters was good in the polling centres but no representative from BNP or Jatiya Oikya Front was seen.During the visit of Nakhalpara Primary School polling centre (female) at 9:15am, it was found that about 250 votes were cast out of 2,521.Presiding officer of the centre Mamun Rashid said the agents of AL, Jatiya Party and Islami Andolon Bangladesh were present in his centre. But no agent from BNP came to his centre.Presiding officer of a male centre at the same school Alimur Rahman said about 350 votes were cast till 9:20 am.He also said the agents of different parties, including AL, except BNP were present in his centre.The same scenario was found in Tejgaon Civil Aviation Centre in Shahinbagh area. The school housed a total of 10 booths with 9,888 voters.Where top leaders cast voteAwami League president and prime minister Sheikh Hasina cast vote at Dhaka City College centre in the capital at 8am, while Awami League general secretary Obaidul Quader cast his vote at Udayan Kindergarten centre in Basurhat municipality under Noakhali-5 constituency at 8:50am.Jatiya Oikya Front chief Kamal Hossain cast vote at Viqarunnisa Noon School and College centre in the capital around 8:56am and BNP general secretary Mirza Fakhrul Islam Alamgir cast his vote at the Thakurgaon Government Girls’ School around 8:30 am.last_img read more

1 Sep

March Madness FirstRound Upsets Leave Just 0036 of ESPN Users Brackets Perfect

first_imgMarch has again descended into madness — with first-round upsets in the NCAA Men’s Basketball Tournament putting the hurt on millions of fans’ brackets from the get-go.After the first 16 games of the Round of 64 concluded on Thursday, just 6,306 brackets remained perfect in the ESPN Men’s Tournament Challenge game. That’s 0.036% of the 17.3 million total brackets entered.The biggest bracket-busting upset: Arizona, the No. 4 seed in the South Region, was soundly defeated by No. 13 Buffalo — and Arizona had been picked to win the whole tournament by 4.9% of all ESPN bracket players. Only 10% picked a Buffalo win against the Arizona Wildcats.In addition, No. 11 Loyola-Chicago defeated No. 6 Miami on a buzzer-beater, also in the South Region. Just 36% of ESPN’s users predicted Miami would lose in the first round. ESPN is promoting its March Madness digital fan-engagement even though the sports programmer doesn’t have broadcast or media rights to the live games. Those are held jointly by CBS and Turner, which is carrying the games on TBS, TNT and TruTV. NCAA March Madness games also are available via streaming, mostly to authenticated pay-TV subscribers.Meanwhile, for the 2018 tourney, the University of Michigan has been most socially engaged team so far followed by West Virginia University, according to marketing-analytics firm 4C Insights. Michigan so far has had 323,847 engagement across Facebook and Twitter, followed by WVU (175,652), Duke University (172,676), Purdue University (135,051) and the University of Tennessee (130,377).Moving into the second round, according to ESPN, 47.5% of brackets correctly predicted an Alabama-Villanova matchup in the East Region; only 4.9% predict an upset by No. 9 Alabama over No. 1 seed Villanova.Also in the East Region, 41.3% of participants predict that No. 3 Texas Tech will beat No. 6 Florida in the Round of 32 and 26.2% pick Florida to prevail against Texas Tech.No. 5 Kentucky held off No. 12 Davidson to advance in the South Region, keeping title hopes for the Wildcats alive and the 2% of players who picked them to win it all. Kentucky is one of just 13 schools picked to win the title in more than 0.9% of brackets, and the only one of those that is not a top-four seed.Pictured above: Arizona forward Deandre Ayton (13) reaches for a loose ball during a first-round game against Buffalo in the NCAA men’s college basketball tournament, in Boise, Idaho. Buffalo won 89-68. ×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 Mogul04:350.5x1x1.25×1.5x2xLive00:0002:1502:15center_img Popular on Variety last_img read more

1 Sep

YouTube Removes The Nun Ad After JumpScare Complaints

first_imgAppreciate you bringing this to our attention! This ad violates our shocking content policy and it’s no longer running as an ad. More info here: https://t.co/dOUocjUevh— Team YouTube (@TeamYouTube) August 14, 2018According to its “violent and shocking content in ads” policy, YouTube strives “to avoid offending or shocking users with websites, or apps that are inappropriate for our ad network.” Examples of content considered violent or shocking include “gruesome imagery” and “promotions that are likely to shock or scare.” YouTube responded in appreciation for notifying it of the ad’s inflammatory potential, which, the company’s team Twitter account notes, violates its shocking content policy. A recent ad for “The Nun,” the fifth flick in “The Conjuring” series, is not the most saintly.Because of the fear the six-second clip has incited in unsuspecting viewers, YouTube has notably taken the video down from the site. The preview, which was streaming before other videos would load on YouTube, displays a typical volume sign increasing in volume and then lowering all the way down when suddenly, the titular nun in full-horror mode appears and makes a blood-curdling scream.One Twitter user issued a warning about the choice jump-scare in the video and cautioned viewers to turn down the volume “if you have anxiety or just straight up hate jumpscares.” The tweet received over 145,000 likes and 132,000 retweets. Shocking factors in video ads concern items like “whether the video shows scenes containing violent and/or graphic imagery that can be shocking or disturbing to viewers” or “whether the violence contained in the video is realistic when posted in a dramatic context.”While the YouTube ad for the film may be down, “The Nun” will be “jumping” into theaters on Sept. 7. Set in 1952 Romania, the film follows the investigation of the mysterious death of a nun at a monastery. Demian Bichir, Taissa Farmiga, and Jonas Bloquet star.A re-upload of the ad can be seen here (at your own risk).RELATED CONTENT: ×How ‘The Purge’ Will Save the Slasher MovieVolume 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 UpBebe Rexha Talked to Sophie Turner About the ‘Game of Thrones’ Finale00:47 twitter facebook reddit Linkhttps://variety.com/2018/digital/news/the-nun-youtube-ad-1202905061/?jwsource=clCopied EmbedCopiedLive00:0001:5601:56More Videos00:47Bebe Rexha Talked to Sophie Turner About the ‘Game of Thrones’ Finale02:15Actors Reveal Their Favorite Disney Princesses00:37Brad Pitt on Retirement05:35The Best of Star Wars at D2301:13Redman Supports Jay-Z’s Partnership with the NFL01:44’It: Chapter Two’ Cast Feeling Pressure For Box Office Success?Closelast_img read more

31 Aug

Scientists Create First NonCarbon Material with NearDiamond Hardness

first_imgResearch scientists have created the first non-carbon-based material with a hardness approaching that of diamond. Their work could have a significant impact on technologies and industries that rely on diamond as a cutting and drilling tool and abrasive. Extremely hard yet metallically conductive: Researchers develop novel material with high-tech prospects Explore further Citation: Scientists Create First Non-Carbon Material with Near-Diamond Hardness (2007, March 28) retrieved 18 August 2019 from https://phys.org/news/2007-03-scientists-non-carbon-material-near-diamond-hardness.htmlcenter_img 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. The material is a boron nitride “nanocomposite.” This means that, rather than consisting of one large continuous crystal, it is made of crystalline boron-nitride grains that are each a few to several nanometers in size. Although research groups have previously reported boron carbonitride materials, claimed to be the second and third hardest materials after diamond, the particular versions, or “phases,” of those materials were unstable at high temperatures. In industry, this is a major drawback.“The real breakthrough would be a bulk material that is hard, tough, and thermally stable, and thus ideal for cutting and drilling. We are the first to synthesize a bulk noncarbon material that fits this description,” said Natalia Dubrovinskaia, a researcher with the University of Heidelberg and the University of Bayreuth, both in Germany, to PhysOrg.com. Dubrovinskaia is the lead author of the paper describing the new material, which appears in the March 8 edition of Applied Physics Letters.For many materials composed of crystalline grains, also referred to as polycrystalline materials, there is a grain size for which the material’s hardness is optimized. This size is often in the nanometer range.Along this line of thought, Dubrovinskaia and her colleagues synthesized and conducted several experiments on a series of polycrystalline and nanocrystalline phases of boron nitride. This characterization included measuring the samples’ “Vickers hardness,” a test that assigns a hardness value to a material based on how readily it is indented by diamond. That value can be expressed in terms of the pressure applied by the diamond – using the pressure unit “pascal” – before it makes an indentation. For very hard materials that usually means billions of pascals (gigapascals, GPa). Single-crystal diamond, the hardest type, has a hardness of about 100 GPa.The boron nitride nanocomposite synthesized by Dubrovinskaia and her group displayed a maximum hardness of 85 GPa at a grain size of about 14 nanometers, and is thermally stable up to 1600 degrees Kelvin (about 2400 degrees Fahrenheit). The material’s hardness arises from two factors: the nanoscale-grain-size effect and each grain’s two-phase composition. That is, each grain has a nanoscale crystalline structure and a sub-nanoscale structure. This complex composition significantly increases the bulk material’s mechanical strength.Prior to this research, the next hardest known material after single-crystal diamond was cubic boron nitride, a single-crystal phase of the material, which has a Vickers hardness of 50 GPa. That leaves a rather large 50 GPa gap.“This gap can be filled by boron nitride nanocomposites, particularly by tuning their grain size and the compositional structure of the grains,” says Dubrovinskaia. “These materials may come to play an important role in industry.”Citation: Natalia Dubrovinskaia, Vladimir L. Solozhenko, Nobuyoshi Miyajima, Vladimir Dmitriev, Oleksandr O. Kurakevych, and Leonid Dubrovinsky, “Superhard nanocomposite of dense polymorphs of boron nitride: Noncarbon material has reach diamond hardness.” Appl. Phys. Lett. 90, 101912 (2007)Copyright 2007 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com.last_img read more

31 Aug

Flaunt your denims right

first_imgIf you feel more comfortable in your denims, invest in a comfortable pair of jogg jeans or zero gravity jeans and pair them with the check shirts or solid hues of polo t-shirts, suggest experts. Invest in a pair of jogg jeans which is one of the revolutionary inventions in the denim industry, with a wide range to choose from. Be it cuffed or straight hem, a draw string waist or a normal waist. These can be worn with checkered or solid shirts or can be matched with polo t-shirts. Also Read – Add new books to your shelfZero gravity jeans are another option if you are looking for something weightless and super comfortable in every position. The fabric is specially designed in lighter gsm (grams per square metre) and are so compact that it looks like normal denim but gives the comfort of a chino.These can be paired with your semi formals and can also be worn to the office with linen blend shirts to hit the club in the evening.Coloured jeans is a new extension to an indigo wardrobe. Available in many hues, they wash well and look amazing. Team it with shirts or t-shirts in solids, stripes and checks. Also Read – Over 2 hours screen time daily will make your kids impulsiveShow your man ankles. Try the coolest new trend in denim fits. Slim fit jeans these days have a cropped length that’s urban, playful, trendy and real easy to go with your plain coloured t-shirt and trendy white sneakers.Cuff your skinny jeans as the 1980’s fun time is back. Excess jeans length going under your shoes is not in trend now. Instead, roll them up or give them two neat folds which would be a perfect relaxed look for this summer.Loose jeans is completely out of trend and long gone and forgotten. Get into skinny fit jeans paired with a slim fit shirt and loafers. This look would be perfect for an evening with friends or family.Black is here to stay. They are never out of fashion. With athleisure fashion taking center stage, black jeans in all its shades are the must-haves for this season.last_img read more