Crystal cantilever lifts objects 600 times its own weight w Video

first_imgAs the scientists noted, another example of a system which exhibits mechanical movement based on the structural changes of individual molecules is biological muscles, in which the molecular-scale movements of proteins generate muscle movement. Both muscles and the crystal cantilever undergo stress, but the stress generated by the crystal (44 MPa) was estimated to be more than 100 times larger than that generated by muscles (0.3 MPa). The crystal’s stress was comparable to that of piezoelectric materials (50 MPa), which are known for their ability to convert mechanical stress into electricity.“The large stress is ascribed to a large Young’s modulus of the molecular crystal,” Irie told PhysOrg.com. “It is known that the molecular-scale shape change of molecules can produce very large local stress, 40-60 kbar, which is close to the pressure needed to convert graphite into diamond. The large stress produced by individual molecules induces the shape change of the crystal.” In the future, the scientists predict that the light-driven crystal actuators could have applications in micro- and nanomechanics, such as for manipulating biological cells and serving as light-driven valves in microreactors. More information: Masakazu Morimoto and Masahiro Irie. “A Diarylethene Cocrystal that Converts Light into Mechanical Work.” J. Am. Chem. Soc. DOI:10.1021/ja105356w (PhysOrg.com) — For a long time, scientists have been trying to transform the collective movements of tiny molecules into useful mechanical work. With this goal in mind, a team of researchers from Japan has developed a crystal cantilever that exhibits reversible bending upon alternate irradiation with ultraviolet (UV) and visible light. They’ve demonstrated that the crystal cantilever can lift metal balls that weigh up to 600 times more than the cantilever itself. In this process, the crystal’s photogenerated molecular-scale shape change generates a very large amount of stress – more than 100 times larger than the stress produced by biological muscles – to induce the macroscale movement. Masakazu Morimoto and Masahiro Irie from Rikkyo University in Tokyo, Japan, and the Japan Science and Technology Agency have published their study on the crystals in a recent issue of the Journal of the American Chemical Society. The current study expands on the scientists’ previous paper, in which they showed that the alternate irradiation of UV and visible light on a crystal can can cause shape changes in the crystal’s molecules, which can result in a macroscale shape change of the crystal material. Although the previous paper showed that molecular-scale events could induce macroscale movements, the crystals were too small and fragile to be used in real-world applications.In the current study, Morimoto and Irie used a two-component cocrystal to achieve greater strength and durability. The cocrystal is a thin, rectangular plate of 1-5 mm in length, 0.2-1.5 mm in width, and 10-50 µm in thickness. When irradiated with UV light (365-nm wavelength), the crystal bends away from the light source and turns blue. The scientists explained that the bending is due to the expansion of the crystal lattice induced by the shape change of the component diarylethene molecules. The crystal continues to bend until the UV light is switched off, and the crystal keeps its bent shape in the dark. When irradiated with visible light (440-nm wavelength), the crystal returns to its original straight shape and the blue color disappears. The scientists could repeat the photostimulated bending cycle more than 250 times without observing any damage to the crystal. (Left) When the crystal cantilever is irradiated with UV light from the right, it bends away from the light, and then returns to its original straight shape upon visible light irradiation. (Right) When the crystal cantilever is illuminated with UV light from below, it bends upward to lift a 2-mm lead ball weighing 46.77 mg (the crystal cantilever weighs 0.17 mg). Image credit: Morimoto and Irie. ©2010 American Chemical Society. Copyright 2010 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. Play This video shows the crystal cantilever lifting the 2-mm lead ball when illuminated from below with UV light. Credit: Morimoto and Irie. The scientists also demonstrated that the crystals could be used to lift heavy metal balls. Acting as a cantilever arm, a 0.17-mg crystal could lift a 2-mm, 46.77-mg lead ball, and a 0.18-mg crystal could lift a 3-mm, 110.45-mg steel ball, which was 614 times heavier than the crystal. These experiments showed that the crystal cantilever arm could generate a strong force (1.1 mN) and perform large mechanical work (0.43 microJ). Citation: Crystal cantilever lifts objects 600 times its own weight (w/ Video) (2010, October 1) retrieved 18 August 2019 from https://phys.org/news/2010-10-crystal-cantilever-weight-video.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. Micromuscles: Micrometer-Sized Actuators from Liquid-crystal Elastomers (w/ Video) Play This video shows the reversible bending of the crystal cantilever when illuminated first with UV light and then with visible light. Credit: Morimoto and Irie. PausePlay% buffered00:0000:00UnmuteMuteDisable captionsEnable captionsSettingsCaptionsDisabledQuality0SpeedNormalCaptionsGo back to previous menuQualityGo back to previous menuSpeedGo back to previous menu0.5×0.75×Normal1.25×1.5×1.75×2×Exit fullscreenEnter fullscreen PausePlay% buffered00:0000:00UnmuteMuteDisable captionsEnable captionsSettingsCaptionsDisabledQuality0SpeedNormalCaptionsGo back to previous menuQualityGo back to previous menuSpeedGo back to previous menu0.5×0.75×Normal1.25×1.5×1.75×2×Exit fullscreenEnter fullscreen Explore furtherlast_img read more

Rumor Xbox 360 games to be playable on Windows 8 PCs

first_img © 2010 PhysOrg.com via Insideris Of course, since this is only a rumor there is no way to know if this supposed feature is expected to show up in all of the Windows 8 machines out there, or if certain hardware specifications that will need to be met in order to play with the Xbox 360 games. While this does have the potential to expand the base of Xbox 360 users it would also neuter the consoles sales, since there would be no need to buy both a game console and a PC. Though, if this turns out to be true, the company may have to deal with some resentment from the early adopters of the Xbox 360 who had to buy the console, pay to upgrade their hard drive size and then pay for a separate wireless connectivity point in order to get online. Then again if the rest of the Microsoft video gaming rumors turn out to be true Xbox 360 fans may already be onto the next thing. Many gamers are expecting the announcement of yet another next generation video game console at E3 2012. If that is the case then the Windows 8 maneuver may be a way to expand the sales of the considerable library of Xbox 360 titles after the console is no longer the newest thing. Explore further Microsoft links new smart phones to Xbox Live Citation: Rumor: Xbox 360 games to be playable on Windows 8 PC’s (2011, July 12) retrieved 18 August 2019 from https://phys.org/news/2011-07-rumor-xbox-games-playable-windows.htmlcenter_img Windows 8 screenshot More information: (PhysOrg.com) — A number of different sites are reporting the rumors that are making gamers ears twitch. The rumor says that Microsoft is about to make a big addition to the desktop version of its upcoming Windows 8 operating system; the ability to play their Xbox 360 game disks on their PC. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more

Laughing at men with men

first_imgLet me start by putting a disclaimer for this story- ‘The ideas put across are only in accordance with the event and no personal affiliations are attached!’So here is a show which talks about the plight of men and questions why only women fraternity in India get the maximum sympathy or are the soft targets for any ill. The good news (saviour)- they do this by tickling the funny bone.Titled Two and a Laugh Men, the stand-up show aspires to bring change in every man’s life. Also Read – ‘Playing Jojo was emotionally exhausting’‘That is correct, We are going to create history. And Why do we need a special show dedicated to the life of men – because no one addresses problems that men face, because everything in this world revolves around women, because men are the easiest victim,’ said Nishant Joke Singh, who will put up an act of a pseudo pregnant man.Explaining his act, Nishant says, ‘I don’t understand why people call pregnancy as good news? I personally want to kill that person who came out with celebrating this time. Can you imagine the frustrated state of man’s mind who is devoid of sex for nine long months!’ Also Read – Leslie doing new comedy special with Netflix‘Secondly the state of pregnancy is as harsh on the man as on the woman. Which is justified in the following instance- the other day my wife gave alms to a beggar and a few seconds later had an attack of mixed emotions. She was calm, dumb and angry at the same time, basically implied that she was three Gandhis (Mahatma, Rahul and Varun) all together’, added Nishant.Another performer for the day is Abijit Ganguly, who is in a relationship for a century now, because dealing with his girlfriend is equivalent to that. If being single pisses you off, then one has to know these facts about being commited- first, a girlfriend’s ‘Bye…tc’ is a politically correct way of saying ‘Bye…f*** off’, secondly, the statement ‘We go shopping and we pay bills’ transforms into ‘He pays the bill’,’ explains Abijit. The third performer for the day is Amit Tandon who would put across what happens to a man after marriage. ‘My act would encourage people to not have kids, hence population control is one of the side effect of my act,’ said Amit.The show is a 90 minutes humour act combined with an attempt to revolutionise man’s position in this women dominated world for the sake of Man-kind. ‘There will be 10 minutes of stand up by three of us, later followed by live impromptu question-answer sessions by engaging the crowd,’ said Nishant.last_img read more

Fresh sexual harassment suit against USAs iGATE

first_imgUS-based outsourcing firm iGATE has been slapped with yet another sexual harassment suit by an ex-employee, claiming that she was sexually abused by the firm’s Legal Head and her supervisor.Karetha Dodd, a US national, has sued iGATE and her supervisor Mukund Srinath on charges of sexual harassment at the US District Court for the Northern District of California in September last year. Dodd has also alleged that she was targeted at iGATE after she testified against its then CEO Phaneesh Murthy who was accused of sexually harassing Investor Relations Head Araceli Roiz. In her complaint, Dodd has alleged that “she was subjected to harassing behaviour by her superior (Srinath) and when Plaintiff (Dodd) refused to have a sexual relationship with him, he retaliated by taking negative employment actions against her.” According to her LinkedIn profile, Dodd worked at iGATE as Vice President and Head of Legal (Americas) and resigned in August 2013.last_img read more

Train runs over leopard in Siliguri

first_imgSiliguri: A train mowed down a leopard near Nakshalbari, Siliguri.In the early hours of Thursday morning, an adult male leopard was found dead near Hatighinsha’s Chenga riverside rail line in Nakshalbari. The Forest department was immediately informed by the locals, following which personnel from the department arrived at the spot along with T T Bhutia, the range officer.The body of the animal has been taken by the department for post-mortem in Sukna forest.”We found the leopard already dead when we arrived. It had serious injuries in one of its front legs and its neck,” stated a forest source.Investigation has revealed that a passenger train from Katihar had crossed the rail line in that area on Wednesday night.last_img

Fire breaks out at ESIs medicine room in Sealdah none injured

first_imgKolkata: Three fire incident across the city triggered tension on Thursday and Friday.On Thursday night, a fire broke out at the service dispensary room (medicine room) of ESI Hospital in Sealdah. Another fire broke out at an empty Puja pandal at Survey Park. In another incident of fire, several shanties were gutted on Thursday evening in Dum Dum Cantonment area. No one got hurt in any of these incidents. According to the police, on Thursday around 10:15 pm, some staff of ESI Hospital saw smoke billowing out of the medicine room. The hospital super, police and fire brigade were immediately informed. Also Read – Rain batters Kolkata, cripples normal lifeWithin a few minutes, three fire tenders reached hospital and controlled the fire within 10:35 pm. Due to the fire, several medicines got damaged. A refrigerator where medicines used to be preserved also got damaged. Sources informed that the fire may have occurred due to some electrical disorder. In another incident on Thursday, several shanties were gutted near wireless math area at Dum Dum Cantonment. Four fire tenders doused the flames within a short period of time. Some residents of those shanties felt ill due to smoke but no one sustained burn injuries. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedOn Friday afternoon, another fire broke out at Survey Park in the afternoon. Police informed that the Puja pandal of Trikon Park Puja committee was getting dismantled. Around 12 pm while untying ropes from bamboos, a worker noticed flames close to him. He immediately warned others and all of them maintained safe distance. Locals informed police and fire brigade. Two fire tenders were pressend into action to control the fire. Though the flames did not spread, smoke from the inflammable materials was quite dense. No injury was, however, reported in the fire. The cause of fire was not confirmed but it is suspected that somehow a spark came in touch with the straw which was used to make the pandal.last_img read more

Safeguard tattoos from summer evils

first_imgSummer season is the perfect time to flaunt your tattoo in sleeveless tees, shorts and beachwear. However, with the scorching sun, it becomes all the more important to take care of your tattoo and the skin. After all, you don’t want to be attacked by skin infections, allergies and heat rashes.Rohit Batra, dermatologist at Sir Ganga Ram Hospital, Vivek Mehta, dermatologist at Pulastya’s Cadle Skin Laser Clinic, Neha Mittal, aesthetic and cosmetic physician at Dermaworld Skin and Hair Clinics, suggest how to protect tattoos during summer: Also Read – Add new books to your shelfShowing off the tattoo is one of the key reasons for getting a tattoo done but at the same time it is also the main cause that it fades away. The sun’s UV rays will quickly reduce the beauty of the tattoo, making it appear dull, resulting in colour spreading or scarring.Therefore, sun protection is important. Apply sunscreen (SPF 30 or above) generously on the tattoo. Make sure that you do this soon after you get inked. Ten to 14 days after getting a tattoo done, limit your sun exposure and apply sunscreen. Reapply sunscreen every two to three hours. Also Read – Over 2 hours screen time daily will make your kids impulsiveNo matter how difficult it is, control your urge to flaunt your tattoo for at least initial days of recovery in order to avoid any kind of infection. Scarring, sunburn and skin problems like Melanoma are other issues that may affect your skin.Avoid bathtubs, hot water and ocean or pool water as they may contain a harmful chemical which might cause irritation, allergy or other skin issues.It is quite normal to feel itchy and sensitive on the area of the tattoo especially after a few days of a new tattoo. Therefore, use a moisturiser with an anti-oxidant formula.last_img read more

PC Sharma new ER general manager

first_imgKolkata: P. C. Sharma, from the 1981 batch of Indian Railways Stores Service (IRSS), took over as general manager, Eastern Railway, on Thursday in addition to his present posting as general manager, Metro Railway.In 1983, Sharma started his career in North East Railway, Gorakhpur. He has worked as chief materials manager at Rail coach Factory in Kapurthala, Railway Electrification in Allahabad, Northern Railway in Baroda House and as executive director in Railway board from 1986 to 2013. He has worked as divisional railway manager in Nanded from 2013 to 2015. Prior to his posting as general manager, Metro Railway, he worked as principal chief materials manager, western railway in Mumbai. Sharma has also undergone specialised training in technological upgradation of rolling stock in Germany and Austria in 2008 & Advanced Leadership Programme at CMU, Pittsburgh, USA in 2017.last_img read more

Kolkata registers 65 deficit rainfall in July

first_imgKolkata: The city has registered around 65 per cent average deficit rainfall in July so far while the figure in case of the state stands at 36 per cent.The Regional Meteorological Centre in Alipore in the last month predicted a shortage in rainfall across the state in July. Bengal had also received less amount of rain in June compared to the corresponding month in the previous years due to the late coming of the monsoon and an irregularity in the rainfall. Also Read – Rs 13,000 crore investment to provide 2 lakh jobs: MamataThe situation did not improve in the current month as the rain deficit continues to haunt the people in the state. Deficit rainfall is a major cause of concern for the farmers and it may affect the crops in various districts. The weather office on Monday said that there is no possibility of rainfall in the city and South Bengal districts in the next three days. All the North Bengal districts are expected to receive heavy rainfall in the next four days. Also Read – Lightning kills 8, injures 16 in stateA rainfall alert has been issued to the districts in North Bengal. According to a weather official, a low pressure trough is expected to form over Bay of Bengal on Thursday which would bring moderate to heavy rainfall in all the South Bengal districts on Friday and Saturday. The city dwellers are under the spell of hot and humid weather for quite some time. Due to a shortage in rainfall the humidity level in South Bengal shoots up giving difficult days to the people across South Bengal. “As there was no significant rainfall in South Bengal in past two months, people are experiencing sultry weather. A low pressure trough formed over Bay of Bengal few days ago finally moved towards Odisha and Andhra Pradesh giving a miss to the city. There has been a significant shortage in rainfall in the city and South Bengal districts as well in July,” a weather expert said. Various farmers from districts such as East Burdwan, Nadia, Murshidabad and North 24-Parganas have already complained about damage of crops due to high-level of humidity. The paddy cultivation has also been affected due to scarcity of rainfall. The rain deficit in the two consecutive months hit the farmers hard and the shortage also casts a spell of doubt as to what will happen to their crops if the situation continues. North Bengal districts have received heavy rainfall ever since the south-western monsoon made incursion into the region.last_img read more

That Time Boris Yeltsin was Found Drunk on a DC Street Trying

first_imgDiplomacy has its rules. Some of them are common sense, and some of them are arcane, really only familiar to diplomats and their aides. However, though it’s likely not in any book on diplomatic manners, wandering about your hosts’ residence and out into the street in just your underwear, drunk, trying to hail a taxi to order a pizza is probably not near the top of the list of appropriately diplomatic things to do. “What???” you say? Yes, it actually happened. Twice. In 2009, author Taylor Branch interviewed Bill Clinton about his presidency, legacy, etc.During the interviews, Clinton revealed some things about Boris Yeltsin that had previously been known to only a small group of people.Bill Clinton, 42nd President of the United States.Clinton seems to have genuinely liked Yeltsin, but knew he was likely to say or do something strange at any moment, due to his tremendous intake of alcohol.Yeltsin was also famously informal, having been brought up in the working classes of the Soviet Union and prized as the de-facto “mayor” of Moscow for his blunt, no-nonsense talk. Mostly though, it was the alcohol.Official portrait of Boris Yeltsin. Photo by Kremlin.ru CC BY 4.0Clinton related how the Russian leader had once called him drunk in the middle of the night and suggested an idea for a new type of superpower summit – on board a nuclear submarine.Once, Yeltsin gave Clinton a Russian hockey jersey that said “Clinton ’96” on it. Yeltsin has a matching jersey, with his name on it, and tried to get the President to wear the shirts in public with him.On a visit to Franklin Roosevelt’s home in Hyde Park, New York, Yeltsin said something off-color to the crowd of reporters gathered there.Bill Clinton and Boris Yeltsin, 1994.It was obvious that the Russian leader had had too much wine during the formal lunch at FDR’s place, and Clinton tried to cover for him by laughing excessively.Then there is the pizza episode. Yeltsin, in the United States for meetings with Clinton in 1994, was staying at Blair House, the President’s official guest house. The Secret Service received a call about the Russian president from police on the scene who recognized the Russian leader.The President’s Guest House pictured in 2007.Yeltsin was standing all by himself on Pennsylvania Avenue, drunk out of his mind, in his briefs and t-shirt (and nothing else), yelling for a taxi. When the agents tried to reason with him, Yeltsin told them that he did not want to go back to Blair House — he wanted a pizza. Now.Clinton related how the agents successfully got Yeltsin back to Blair House…with the promise of a pizza. Which he got.Boris Yeltsin with Bill Clinton. Photo by Kremlin.ru CC BY 4.0That’s pretty bad, on a lot of levels. Unless you do it again, which is worse, and Yeltsin did it again. Well, he may not have been looking for a pizza the second time, but he definitely wanted out.He snuck down the stairs, eluding both Secret Service and Russian agents. When both security teams found the Russian leader in the somewhat dark basement of Blair House, they almost shot each other, until the situation got quickly straightened out.Blair House.Yeltsin was in the Kremlin until 1999, when he was replaced with his hand-picked successor, Vladimir Putin. Before he left, he pinched a few secretaries and passed out a couple of times.Before you dismiss Boris Yeltsin as a bumbling fool, remember –- he played a significant role in the downfall of Soviet communism and the transition from the USSR to the Russian Federation. He also helped save the planet from accidental nuclear destruction.President Yeltsin with U.S. President George H. W. Bush, June 1, 1992. Photo by RIA Novosti archive, image #859348 / Dmitryi Donskoy / CC-BY-SA 3.0On January 25, 2005, U.S. and Norwegian scientists launched a research rocket over the northwestern coast of Norway, near the border of Russia.Part of the rocket’s trajectory was over a route that the Russians knew would be taken by any inbound U.S. nuclear strike.Both U.S. and Norwegian authorities had done what they were supposed to do –- notify the Russian radar authorities (and others) of the missile launch. The operators in Russia failed to notify high-command.Funeral of Boris Yeltsin. Photo by Kremlin.ru CC BY 4.0What the Russian defense authorities saw on their screens looked awfully like what a U.S. missile would look like if it was in a high-trajectory mode, designed to explode in the atmosphere, release its electro-magnetic pulse to destroy Moscow’s electrical grid and begin a first U.S. nuclear strike.The Russians had only minutes to react. They went to Yeltsin and notified him of the situation. He had the Russian version of the “nuclear football” opened. This is a briefcase with the appropriate launch codes inside, carried by an agent with it handcuffed to his wrist.Read another story from us: Fascism in Italy – The Rise and Fall of MussoliniAll Yeltsin had to do was issue the codes and the world would effectively end. He didn’t. He believed (his generals did not) that a mistake had been made. The world is lucky that Boris Yeltsin used his sober judgment when no one else was willing to.last_img read more