Month: August 2019

  • Jellyfish protein could be used to power nanodevices

    first_imgAequorea victoria. Image credit: Sierra Blakely/Wikipedia. (PhysOrg.com) — Researchers in Sweden have been liquidizing thousands of specimens of a common North American jellyfish to extract a protein that could be used in microscopic fuel cells. Explore further New technique allows simultaneous tracking of gene expression and movement Citation: Jellyfish protein could be used to power nanodevices (2010, October 7) retrieved 18 August 2019 from https://phys.org/news/2010-10-jellyfish-protein-power-nanodevices.htmlcenter_img © 2010 PhysOrg.com The jellyfish (Aequorea Victoria) contain a green fluorescent protein (GFP) that makes them glow in the dark, and a research team led by Zackary Chiragwandi from the Chalmers University of Technology in Gothenburg, Sweden, has been extracting the protein and using it to create a bio fuel cell. When a droplet of the protein is placed onto aluminum electrodes and then exposed to ultraviolet light an electric current is generated at a nanoscale suitable for powering “nanodevices”.Nanodevices are devices measured in nanometers, where one nanometer is a billionth of one meter. Their use in medicine is in its infancy, and one of the chief difficulties in working with nanoscale devices is powering them.Chiragwandi has also used his fuel cell with light-emitting enzymes derived from fireflies and sea pansies (Renilla reniformis) that create their own light source, making the fuel cell completely self-contained. In other research, methods have been developed to grow artificial green fluorescent protein in the laboratory using bacteria, and if successful this would create the GFP without the need to harvest and liquefy large numbers of jellyfish.Other light-powered cells, such as Grätzel cells (which mimic plant photosynthesis), use elements such as titanium oxide, which make them a much more expensive option for powering nanodevices. Since the jellyfish protein fuel cells can also generate their own light, no outside source of light is needed, making the process simpler and more efficient.Chiragwandi says the fuel cells could be used to independently power nanodevices operating in the human body for applications such as fighting or imaging tumors, medical diagnosis, communication devices, or perhaps even reversing blindness. If scaled up they could also be used like thin films to make cheaper solar cells. The technology could become available within one or two years. 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

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  • Pen draws flexible circuits using halfmeter long carbon nanotube fibers

    first_imgResearchers use a pen to draw half-meter-long carbon-nanotube-based fibers. The technique could be used to fabricate flexible electronic circuits. Credit: Huang, et al. ©2015 American Chemical Society © 2015 Phys.org 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. Researchers report progress in development of carbon nanotube-based continuous fibers Diagram of the writing process and images of the ink, pen, and fibers. Credit: Huang, et al. ©2015 American Chemical Society Patterns drawn by hand showing the precision with which the fibers can be controlled. Credit: Huang, et al. ©2015 American Chemical Society In the future, the researchers hope to expand the drawing technique to use different types of ink for different purposes.”We are now working on enabling more functions in the fiber,” Wu said. “For example, one possibility is semiconducting fibers drawn from a pen tip for flexible device applications.” (Phys.org)—While it may look like researchers from Tsinghua University in Beijing are sketching out an idea for a circuit on a piece of paper, they’re actually using a special pen that draws real circuits using carbon-nanotube-based ink.center_img When writing, the pen is lifted off the paper to stretch and suspend the fibers, which can then be laid down on the substrate in the desired position. The researchers demonstrated that complex fiber patterns can be drawn by hand, and they predict that even greater precision can be achieved using advanced mechanical devices.The researchers also showed that increasing the polymer concentration of the ink increases the diameter of the nanotube fibers from 300 nm to 3 µm. In general, thinner fibers have better conductivity than thicker ones due to their better fiber orientation. Tests show that the highly conductive carbon nanotube fibers also exhibit excellent mechanical flexibility. At first, the researchers expected that the ultralong carbon nanotube fibers should maintain their conductivity after bending and distortion. Somewhat surprisingly, their tests showed that the fibers actually exhibit an increase in conductivity after bending—about a 30% increase after 1000 bending cycles. The researchers propose that the stress caused by bending deforms the polymers and improves nanotube alignment, which in turn increases conductivity. Journal information: Nano Letters More information: Sihan Huang, et al. “Direct Writing of Half-Meter Long CNT Based Fiber for Flexible Electronics.” Nano Letters. DOI: 10.1021/nl504150a Citation: Pen draws flexible circuits using half-meter long carbon nanotube fibers (2015, February 20) retrieved 18 August 2019 from https://phys.org/news/2015-02-pen-flexible-circuits-half-meter-carbon.html This technique, called “fiber drawing,” has previously been used to construct patterns, but the fiber length is usually very short at just a few millimeters, and the drawing speed is typically very slow. These drawbacks limit its use in circuit fabrication.In the new study, the researchers demonstrated that their new pen can draw carbon nanotube fibers that are more than a half of a meter long with fast drawing speeds of up to 10 cm/second. Their work is published in a recent issue of Nano Letters.Due to the nanotube fibers’ high conductivity and excellent mechanical flexibility, the researchers predict that the fibers could serve as the fundamental building blocks for a wide variety of flexible electronic devices, such as wearable electronics, flexible touch displays, flexible solar cells, RFIDs, and 3D devices.While the pen itself is an ordinary commercial pen, the ink consists of a combination of electrically conductive carbon nanotube fibers and a viscous polymer solution called polyethylene oxide (PEO). The viscous PEO is highly elastic and mechanically strong, which allows it to pull long nanotube fibers from the solution during the writing process. “The drawing technique allow us to achieve very long carbon nanotube fibers mainly due to the high molecular weight of the polymer and high viscosity of the precursor solution as ink,” coauthor Hui Wu, Associate Professor at Tsinghua University, told Phys.org. Explore furtherlast_img read more

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  • Study shows conservatives less likely to apologize than liberals

    first_img © 2017 Phys.org 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. Journal information: Social Psychological and Personality Science More information: Matthew J. Hornsey et al. Conservatives Are More Reluctant to Give and Receive Apologies Than Liberals, Social Psychological and Personality Science (2017). journals.sagepub.com/doi/10.1177/1948550617691096 A team of researchers led by the University of Queensland’s Matthew Hornsey has found evidence that suggests people who are conservative are less likely to apologize than are those who are more liberal. In their paper published in the journal Social Psychological and Personality Science, the group describes their study and offer their results and some opinions on why there may be differences between the two groups. Apologies aren’t as good as people imagine they’ll becenter_img Credit: Francisco Farias Jr/public domain Explore further Citation: Study shows conservatives less likely to apologize than liberals (2017, March 9) retrieved 18 August 2019 from https://phys.org/news/2017-03-liberals.html Apologies have taken on a new form in the mass media age—where once they were words used by one individual to another, or perhaps a small group, today, they can be messages from well-known people wishing to maintain a certain public persona. But as Hornsey noted in a recent interview with the press, some types of people seem to apologize more than others. He had noticed that liberal politicians and other notables seemed to offer more public apologies then their conservative counterparts. Intrigued, he gathered with colleagues to conduct a study.The first part of the study consisted of drafting a survey which they then sent to 2,130 people living in Chile, Hong Kong, Russia, Peru, Australia, China and the United States. The survey inquired about how willing people were to apologize and under what circumstances. In analyzing the results, they found that those who considered themselves conservative did, indeed, report apologizing less than those who considered themselves to be liberal. They also found that conservatives also appeared to be less influenced by an apology from another, which translated to being less likely to forgive a transgression just because someone apologized for it.The team then conducted a second experiment, this time with 65 volunteers, 38 from India and 27 from America. Each was asked individually to imagine they had been asked to water their neighbor’s lawn while the neighbor went on vacation and that they had done a poor job of it. The volunteers were asked to write down how things would go when the neighbors returned. In studying the written reports, the researchers found that those that self-identified as conservative were less likely to apologize for not doing a better job than did those that identified as liberal.The researchers cannot say for sure why there appeared to be differences in willingness to apologize but theorize that it might be because conservatives engage more in hierarchical thinking than do liberals, which might translate to feelings of losing power over others if they offer an apology.last_img read more

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  • Indian womens team has a strong attack Chief coach Mathias Ahrens

    first_imgIndian women’s hockey team chief coach Mathias Ahrens said that his forwards are preparing well and have a strong attack to take on other teams in the Hockey World League (HWL) Semi-Final, to be played here from June 20 to July 5.“The teams will be evenly placed and all will depend on the initial pressure. On that front we have a strong attack and I am confident of a good start,” said Ahrens on Monday. “The girls realise that continuing ball possession in the opponents D is important and the team is working on short passes and their reaction time once in the D as time will be the key. They have to enter, finish the job in a matter of seconds.”India have been grouped in Pool B with hosts Belgium, Australia, New Zealand and Poland. They will open their campaign against Belgium on June 20. “Our first match is against the Belgium. They will have just one advantage over us, which will be playing in front of their home crowd,” said German.last_img read more

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  • Reminiscing the essence of folklore

    first_imgFolk songs and folk dance represent the true essence of a state, making it unique from the others.In order to promote folk, especially Baul music, a colourful ensemble of folk songs and dance of Bengal was presented by a cultural troupe on Friday in the ‘Bharat Parv’ event, which is being organised by the government of India at Red Fort as a part of the Republic Day celebrations. Prantic Cultural Society, Indirapuram, presented the performance as part of the cultural programme segment of ‘Bharat Parv’.  Also Read – ‘Playing Jojo was emotionally exhausting’The programme was supported by the Office of the Resident Commissioner, government of West Bengal. West Bengal tableau, which won the first prize at this year’s Republic Day showcasing ‘Bauls of Bengal’, was displayed at the Red Fort grounds as part of the event along with other Republic Day Parade tableaux. A team of 24 Baul singers from West Bengal also performed at the ‘Bharat Parv’ event on January 30 in the national Capital.last_img read more

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  • CID takes over investigation into gunning down of three TMC activists

    first_imgKolkata: The Criminal Investigation Department (CID) of West Bengal Police Friday took over the investigation into the gunning down of three Trinamool Congress activists at Joynagar in South 24 Parganas district. “We are taking over the Joynagar case and will start an investigation into the matter,” a senior CID officer told PTI. Motorbike borne assailants attacked three persons including the driver of a vehicle when they were at a petrol pump in Joynagar on Thursday evening, shortly after Trinamool Congress MLA Biswanath Das disembarked from the vehicle at a party office nearby. Initially, police has detained a few people for questioning in connection with the shootout. Das alleged that CPI(M) goons were behind the incident, but the CPI(M) leader Sujan Chakraborty claimed that the shootout was the result of internal feud of the ruling Trinamool Congress.last_img read more

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  • Kolkata Police starts building database on senior citizens

    first_imgKolkata: Kolkata Police has started its initiative to gather the details of senior citizens across the city and install CCTV cameras at their houses. On Wednesday, following the instruction of Chief Minister Mamata Banerjee, the Commissioner of Police (CP), Kolkata met with all Deputy Commissioners (DCs) and instructed them to prepare a database.After the instruction was conveyed to the Officers-in-Charge (OCs) of all police stations under Kolkata Police, the work of gathering data was started on Thursday. In several divisions of Kolkata Police, OCs and other police officials went to the houses of senior citizens to gather information. Also Read – Rs 13,000 crore investment to provide 2 lakh jobs: MamataOn Thursday morning, OCs and other officials of police stations under the jurisdiction of East Division visited the households where elderly couples stay. Some of them are existing members of Pronam, an initiative by Kolkata Police for the elderly citizens. DC, East Division Rupesh Kumar himself visited some houses, along with the officials from local police stations. “Officers from all police stations in East Division are visiting Pronam members. At present we have 636 members under East Division. We are visiting existing Pronam members as well as new elderly families,” said Kumar. Also Read – Lightning kills 8, injures 16 in stateApart from gathering information in order to create a database, several houses where elderly citizens live have been identified. On Thursday, OC of New Alipore police station Amit Sankar Mukherjee, along with other police officials also visited the houses of elderly citizens. Sources have informed that so far, 102 elderly citizens’ houses have been identified, who have been found to be vulnerable. At one house, a CCTV camera was installed and gradually, CCTV cameras will be installed in all 102 households. At present, 294 elderly citizens who are the members of Pronam, live within the jurisdiction of New Alipore police station. The Digital Video Recorder (DVR) of the CCTV camera will be installed at the local police stations, from where OCs and other officials will be able to monitor the footage. For installation of CCTV cameras free of cost, a No Objection Certificate (NOC) needs to be given to police by the house owners.last_img read more

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  • There are plenty of legitimate reasons to question the Lakers hiring of

    first_imgColin has doubts about Magic Johnson, just like he has doubts about John LynchDan LeBatard came under fire for comments he made regarding Magic Johnson’s qualifications to run the Lakers’ basketball operations. LeBatard implied that Magic keeps getting gigs because of his charm and charisma, despite failing as a coach, talk show host, and what he characterized as a lackluster tenure on as an NBA TV analyst.Fellow ESPN’er Keyshawn Johnson thought the comments were racist, and PTI host Michael Wilbon sent a series of Tweets criticizing LeBatard for conveniently ignoring Johnson’s post-basketball business success.Today in The Herd, Colin didn’t defend LeBatard’s comments, but said it’s fair to question any GM entering a professional sports job with no prior front office experience. He was critical of John Lynch’s lack of experience when he was hired as the Niners GM. It’s fair to say the same applies to Magic. There are plenty of legitimate questions.“I think it’s actually healthy to question Magic and John Lynch. I have major doubts about both. And another reason I do, is because I’ve watched Phil Jackson in New York. He’s a smart dude. He’s been a disaster.”In today’s NBA, Lou Williams to Houston is as big a trade as Boogie Cousins to New Orleans. The NBA trade deadline came and went, and the biggest name that switched teams was Boogie Cousins. Colin thinks Boogie won’t be winning in New Orleans, so the move is irrelevant in terms of impact.He thinks Lou Williams moving to Houston is the biggest move of the deadline in terms of ultimate playoff impact. In today’s NBA, a knock down three-point shooter like Williams could allow the Rockets to push Golden State in the West.“It’s such a three-centric league that Lou Williams to Houston feels every bit as big to me as Boogie Cousins to New Orleans.”Guests:Jeff Gordon – NASCAR Champion joins the show to look ahead this weekend’s Daytona 500; how driver strategy differs depending on the track; how his image has changed over the years; why it takes days to recover from driving in Daytona; and if he ever stared down another driver during a neck-and-neck finish.Gregg Doyel – Indianapolis Star columnist joins the show to explain why he thinks Larry Bird failed at the trade deadline; why he thinks Paul George is eventually headed to L.A.; if Paul George takes too many nights off; if it’s fair to question Magic’s qualifications; why Tom Crean shouldn’t be fired; if Indiana has unrealistic expectations.Chris Broussard – FS1 NBA analyst joins the show to explain why the Celtics passed on Paul George;  if he’s surprised Jimmy Butler wasn’t traded; why Lou Williams is the most significant addition; and if any upcoming rookie can make an instant impact next season.Bobby Marks – NBA Insider at The Vertical joins the show to talk about the learning curve for Magic Johnson; why the Lakers need more than  just one star to get back on track; and which rookie can make an impact next year.Ric Bucher – Sirius XM host and NBA writer at Bleacher Report joins the show to talk Magic as GM; what attributes can help him in the job; if the Lakers can mimic the Warriors model; and if it’s a done deal that Paul George will eventually be a Laker.last_img read more

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  • VIDEO LaVar Ball makes delusional claim that the Lakers would have a

    first_img Per LaVar:“Here’s what everybody is saying: The kids are young. OK, I want the young kids. You give me a bunch of young pros, and my record would be better than this on the fact that I’m 50-something years old and I know the game. But if you got a guy who’s 38, maybe he’s not experienced enough. Maybe stop talking about the players are so young, and maybe it’s the coaching experience that’s young. Yeah, nobody wants to say that but I say it because I’m 50-years-old and I know the game. You give me those guys and I guarantee you they’ll be in a much better position than this, because you’re not playing the guys or you’re not getting the best out of a lot of people.”Magic Johnson’s LaVar Ball headache is increasing to a persistent migraine. This whole thing just doesn’t seem like it’s going to end well. It’s already toxic.If only there were some signs before the draft that this could potentially be a huge problem…….h/t Total Pro Sports Advertisement LaVar Ball fired another salvo in his escalating war of words with the Lakers organization, and head coach Luke Walton, in a situation that is quickly devolving into a dumpster fire.In response to Ball’s  criticism of how the Lakers are playing his son, Walton has said publicly that he’s not concerned with the comments of parents, and in a recent interview Ball fired a return shot.When asked about the Lakers struggles, LaVar made the delusional claim that the team would have a better record if he was the coach, and criticized the 38-year-old, second year coach for using the young roster as an excuse for not winning games. He also called Walton’s credentials into question.last_img read more

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  • Gottlieb breaks down the Lakers yearone plan for LeBron

    first_imgGottlieb looks at the Lakers first year plan with LeBron; why all signs point to LeBron playing small five; and why fans don’t understand the realities of team building; his expectations for OKC now that Paul George is in the fold; and how Boogie Cousins will make the Warriors worse defensively. Advertisement Guests:center_img David Griffin – Former Cavs GM on LeBron moving to L.A., when he saw the first signs he might leave Cleveland, and how he thinks LeBron’s game will change with the Lakers.Joe Vardon – Cleveland.com Cavs Beat Writer on life with LeBron LeBron/Kyrie beef; and Cleveland’s reaction to him leaving for L.A.Nicki Collen  – WNBA Head Coach of the Atlanta Dream on her path to coaching in the WNBA, and the differences between coaching in college and the pros; and if players should make more money.Make sure you download and subscribe to All Ball and The Herd Podcast Network on iTunes and iHeart, or however you choose to listen!last_img read more

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