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The Worlds Smallest Spontaneous Atomic Valentine

first_imgThe Jeol 2100F microscope, a new generation aberration-corrected electron microscope, allows a clear view of the palladium atoms. Explore further Citation: The World’s Smallest Spontaneous Atomic Valentine (2010, February 14) retrieved 18 August 2019 from https://phys.org/news/2010-02-world-smallest-spontaneous-atomic-valentine.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. According to the physicists observing the atoms through the Lab’s JEOL 2100F microscope, Zhiwei Wang and David Pearmain, they watched with love, but really had absolutely nothing to do with the heart formation of the atoms.Sadly, the bright, beautiful palladium Valentine will not be given to a special lady. Being only 8 nanometers in size, it can’t be seen by the human eye, and cannot even be relied upon to stay in the smallest ring setting. But we can all admire the wonderful high-angle, very high-power shot of the world’s smallest and, arguably, prettiest naturally-formed Valentine.Although the palladium Valentine was a nice surprise for the scientists, they actually have other reasons for studying the palladium atoms. Professor Richard Palmer, head of the Laboratory explained:”Size-selected atomic clusters, of the kind which fused together to assemble the atomic heart, are of practical relevance as model catalysts; the palladium/carbon system is employed as a real industrial catalyst in the fine chemicals sector. Precise control of the atomic architecture of the clusters may lead to enhanced yield and especially selectivity in complex catalytic reactions, as well as reducing the number of metal atoms needed to catalyze the reaction.”The Nanoscale Physics Research Laboratory was established in 1994 as the first centre for nanoscience in the UK. Four spin-off companies have been generated from the Laboratory since 2005. © 2010 PhysOrg.com More information: Information provided by: Professor Richard Palmer, The Nanoscale Physics Research Laboratory, University of Birmingham. Platinum nanocatalyst could aid drugmakers (PhysOrg.com) — Palladium atoms placed on a carbon base spontaneously formed into an 8 nanometer heart at the University of Birmingham’s Nanoscale Physics Research Laboratory this week. Just in time for Valentine’s Day! last_img read more

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Liquid Robotics launches quartet on epic swim across Pacific

first_img More information: google-latlong.blogspot.com/20 … iders-on-record.html Citation: Liquid Robotics launches quartet on epic swim across Pacific (2011, November 26) retrieved 18 August 2019 from https://phys.org/news/2011-11-liquid-robotics-quartet-epic-pacific.html Explore further © 2011 PhysOrg.com The company aims to set a Guinness world record for longest unmanned ocean voyage. The journey will take an estimated 300 days.Their propulsion systems will run by waves and their sensors will be powered by the sun. Much of the robots’ bodies sit above water. They propel themselves by repeatedly changing their buoyancies, using the motion of surface waves to paddle underwater fins. The upper half of the wave-riding robot looks like a surfboard and is attached to a lower part that sports the fins.The four robots will take sensor readings every 10 minutes on data such as salinity, water temperature, weather, fluorescence, and dissolved oxygen. These gliders are essentially little data centers on the ocean with big ambitions in collecting information that scientists can use. The sensors will also collect information about wave features and currents. The Iridium satellite network will stream the robot data. The data can be accessed on Google Earth’s Ocean Showcase, or in a more complete form to researchers who register.The four robots are expected to collect approximately 2.25 million discrete data points. The expedition is being supported by Google Earth and Richard Branson’s Virgin Oceanic. Most of the ocean remains unexplored with less than 10 percent of it mapped out, said Jenifer Austin Foulkes, Google product manager.The point, says Graham Hine, senior vice president of operations at Liquid Robotics, is to prove that this type of technology is ready to increase understanding of the ocean.James Gosling, creator of Java, is chief software architect of Liquid Robotics, which sells the robots to energy companies that monitor offshore rigs and collect oceanographic data. Customers also include government and research organizations.As for this project, Liquid Robotics wants to see what the scientific community does with all the data. The company seeks project abstracts, and will award the top five proposals. The award is in the form of six months’ use of a Wave Glider, to be optimized to collect whatever information the winner needs.center_img Robotic boats to travel across Pacific Ocean (PhysOrg.com) — Four self propelling robots, called Wave Gliders,from the company Liquid Robotics were launched last week from San Francisco for a 33,000 nautical mile journey. The robots took off from the St. Francis Yacht Club. The robots will swim together to Hawaii and then will split into pairs. One pair will be off to Japan (“Piccard Maru” and “Fontaine Maru”). The other pair will be off to Australia (“Benjamin” and “Papa Mau). 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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Fiber optic light pipes in the retina do much more than simple

first_img Explore further (Phys.org) —Having the photoreceptors at the back of the retina is not a design constraint, it is a design feature. The idea that the vertebrate eye, like a traditional front-illuminated camera, might have been improved somehow if it had only been able to orient its wiring behind the photoreceptor layer, like a cephalopod, is folly. Indeed in simply engineered systems, like CMOS or CCD image sensors, a back-illuminated design manufactured by flipping the silicon wafer and thinning it so that light hits the photocathode without having to navigate the wiring layer can improve photon capture across a wide wavelength band. But real eyes are much more crafty than that. Journal information: Nature Communications 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. More information: Müller cells separate between wavelengths to improve day vision with minimal effect upon night vision, Nature Communications 5, Article number: 4319 DOI: 10.1038/ncomms5319AbstractVision starts with the absorption of light by the retinal photoreceptors—cones and rods. However, due to the ‘inverted’ structure of the retina, the incident light must propagate through reflecting and scattering cellular layers before reaching the photoreceptors. It has been recently suggested that Müller cells function as optical fibres in the retina, transferring light illuminating the retinal surface onto the cone photoreceptors. Here we show that Müller cells are wavelength-dependent wave-guides, concentrating the green-red part of the visible spectrum onto cones and allowing the blue-purple part to leak onto nearby rods. This phenomenon is observed in the isolated retina and explained by a computational model, for the guinea pig and the human parafoveal retina. Therefore, light propagation by Müller cells through the retina can be considered as an integral part of the first step in the visual process, increasing photon absorption by cones while minimally affecting rod-mediated vision. Researchers use human stem cells to create light-sensitive retina in a dishcenter_img Muller Cells appear to act as living optical fibers. Credit: vision-research.eu Citation: Fiber optic light pipes in the retina do much more than simple image transfer (2014, July 21) retrieved 18 August 2019 from https://phys.org/news/2014-07-fiber-optic-pipes-retina-simple.html A case in point are the Müller glia cells that span the thickness of the retina. These high refractive index cells spread an absorptive canopy across the retinal surface and then shepherd photons through a low-scattering cytoplasm to separate receivers, much like coins through a change sorting machine. A new paper in Nature Communications describes how these wavelength-dependent wave-guides can shuttle green-red light to cones while passing the blue-purples to adjacent rods. The idea that these Müller cells act as living fiber optic cables has been floated previously. It has even been convincingly demonstrated using a dual beam laser trap. In THIS case (THIS, like in Java programming meaning the paper just brought up) the authors couched this feat as mere image transfer, with the goal just being to bring light in with minimal distortion.Fireflies, in trying to get light through their cuticle, face a similar but opposite challenge—namely, getting light out. Their fascinating solutions to transparency and index matching are an illuminating read. In the retina, and indeed the larger light organ that is the eye, there is much more going on than just photons striking rhodopsin photopigments. As far as absorbers, there are all kinds of things going on in there—various carontenoids, lipofuscins and lipochromes, even cytochrome oxidases in mitochondria that get involved at the longer wavelegnths. Speaking of the mitochondria, one of their most incredible adaptions in the eye came to my attention recently courtesy of O.R. Pagan, author of a cool book about planarians. His blog mentions how these creatures have convinced the endosymbiont microbes in their eyes to accumulate refractive proteins and tightly pack together. After swelling to several times normal size like a liver about to become foie gras, these mitochondria are transformed into a lens about to focus light onto sensitive cells.In considering not just the classical photoreceptors but the entire retina itself as a light-harvesting engine, it seems prudent to also regard its entire synaptic endowment as a molecular-scale computing volume. In other words, when you have many cells that have no axons or spikes to speak of, that can completely refigure their fine structure within a few minutes to handle changing light levels, every synapse appears as an essential machine that percolates information as if at the Brownian scale, or even below.By contrast the brain itself, while containing much the same, appears not quite so tightly strung. That’s not to say that wiping out swaths of cherished synaptic meat memory in the brain would be on par with taking down a few tubules of kidney, lobules of liver, or osteons of bone, it’s just the retina seems even more brain-like than the brain itself. The retinas of different animals clearly employ different tricks. Some reflect incoming light back out through the retina for a second look. Others can detect things like polarization or even angle of incidence.Most incredibly, like the wings of a swallow, the retina more-or-less works right out of the box, even if it has not seen any exercise. In seeking to understand how it then further refines its delicate structure we should perhaps not overlook the pervasive organizing influence of the incoming photons themselves. Now that it is becoming abundantly clear that the whole works can “feel” them, the next question to answer is how. © 2014 Phys.orglast_img read more

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Officials preparing risk assessment for alpine lake tsunami in Switzerland

first_img Explore further Lake Lucerne. Credit: Ttrainer/Wikipedia/CC BY-SA 3.0 Tsunami hit Geneva in AD 563: scientists Officials in Nidwalden Canton in Switzerland have announced that they have commissioned a study to look into the threat posed by a tsunami in Lake Lucerne—a first for a European alpine region. The study, to be conducted by University of Bern geologist Flavio Anselmetti and his team, will focus on the likelihood of a tsunami occurring in the lake and an assessment of the impact on the region (home to approximately 13 million people) if one should occur. Journal information: Nature Citation: Officials preparing risk assessment for alpine lake tsunami in Switzerland (2014, September 4) retrieved 18 August 2019 from https://phys.org/news/2014-09-alpine-lake-tsunami-switzerland.htmlcenter_img © 2014 Phys.org More information: via Nature A tsunami occurring in an alpine lake is not unheard of, large bodies of water in any location can give rise to the unusual waves—all it takes is a sudden jolt, such as an earthquake stirring things up, a landslide, or a piece of shoreline dropping into the water. And while the European Alps aren’t really known for earthquakes, those large enough to cause problems (magnitude 6 and above) do occur approximately every thousand years or so.The seemingly sudden interest in the threat posed by tsunamis in alpine lakes, has come about as a result of a study done by University of Geneva limnogeologist Katrina Kremer and her team two years ago—they found evidence of a serious tsunami wiping out communities in Lake Geneva AD 563. More recent work by the team has found more evidence of tsunamis in the lake—as many as five big ones over the past 4000 years.Prior to the commissioned study, Anselmetti’s team was already studying Lake Lucerne and its history—they’d found sediment evidence of two tsunamis that occurred in the 17th century, which would have, they believe, led to five meter high tsunamis. The team has also found evidence of unstable sloped sediment sections in the lake that if disrupted by an earthquake, could lead to a large tsunami.Going forward, the team will look at all likely tsunami catalysts, from landslides, to earthquakes to normal erosion (presumably also asteroid and comet strikes) assessing the likelihood of each. They will also attempt to forecast what impact a tsunami might have on the region. In addition to conducting sediment studies, the team will also use data from a variety of sources to build computer models that are capable of graphically demonstrating the path of tsunami flooding that would occur in different parts of the region under different sized tsunami waves. 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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Panel calls for various researchers to band together to create an economic

first_img Citation: Panel calls for various researchers to band together to create an economic policy dashboard (2016, February 19) retrieved 18 August 2019 from https://phys.org/news/2016-02-panel-band-economic-policy-dashboard.html Credit: George Hodan/public domain Overconfidence, loss aversion are key predictors for investment mistakes 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. Explore further As the group notes, to date no tool, model or human being is capable of predicting the type of collapse that occurred in 2008, which contributed heavily to what became known as the Great Recession, and that problem has many people in the financial community on edge, including Andrew Haldane, one of the authors of the paper and chief economist for the Bank of England. He and his colleagues point out that current models are built to approximate the actions of a single rational player, which clearly does not account for the many irrational acts of many in the financial business world—and that has to change.They authors also note that over the past few decades a lot of work has been put into creating models (many based on complexity theory) that have proved useful in other pursuits, such as weather forecasting—they write that they believe the time has come to look for contributions from experts in a variety of fields to come together to see if it might not be possible to create such a model for the global financial system.Key to such a program would be network analysis and behavioral modeling tools—both have proven able to offer useful forecasting given the right set of inputs. With finance, the group acknowledges, such inputs might be more difficult to gather due to the sometimes fuzzy nature of financial interactions between various players; but that does not mean it cannot be done, they propose that it should not be impossible to isolate various tipping points, and to create agent-based computer models which take as inputs actions by some of the most important agents in the field, i.e. individuals who exert strong influence in the financial world and use that information to provide an economic dashboard that would highlight looming problems.center_img © 2016 Phys.org Journal information: Science (Phys.org)—A widely disparate group of scientists and other individuals engaged in modeling and economic research has banded together to call for building a new kind of business model intended to help forecast financial meltdowns, such as occurred in 2008. They have written a paper together and have had it published as a Perspectives piece in the journal Science—in it they are asking others in other areas of study to join the effort to help forge a path to developing a product that might help foresee troubling economic indicators and in so doing perhaps provide a way to prevent serious problems in the future. More information: S. Battiston et al. Complexity theory and financial regulation, Science (2016). DOI: 10.1126/science.aad0299AbstractTraditional economic theory could not explain, much less predict, the near collapse of the financial system and its long-lasting effects on the global economy. Since the 2008 crisis, there has been increasing interest in using ideas from complexity theory to make sense of economic and financial markets. Concepts, such as tipping points, networks, contagion, feedback, and resilience have entered the financial and regulatory lexicon, but actual use of complexity models and results remains at an early stage. Recent insights and techniques offer potential for better monitoring and management of highly interconnected economic and financial systems and, thus, may help anticipate and manage future crises.Press releaselast_img read more

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Deconstructing the tower of Babel

first_imgThe third edition of the India Habitat Centre (IHC) Indian Languages’ Festival Samanvay is scheduled to take place during the last week of the month. This year the festival’s theme is Jodti Zubanein, Judti Zubanein: Language Connections, Spread over four days, the festival would witness seven Padma Shri awardees, twelve Sahitya Akademi recipients, five National Film Award winners, a Padma Bhushan and Oscar Award winner. 20 languages and dialects would be premiered/ featured at Samanvay 2013. Also Read – ‘Playing Jojo was emotionally exhausting’Samanvay is a platform for bringing together expressions of human thought in the varied and diverse cultural contexts that have been nurtured and have flourished in many languages spoken in our cultural milieu. These conversations amongst brilliant and well-known writers will seek to bring to our audiences the sparkle of multilingual expressions and their inspirations.Samanvay 2013 is about connections between languages and the connections languages make: Jodti Zubanein, Judti Zubanein. This is a continuum of the themes that defined the first two editions of the festival; the inaugural an exercise in understanding the notion of the Indian-ness of the various literatures of the country, the second a celebration of the multi-faceted interaction between languages and dialects. It is not only about listeners, readers and authors; it is also about the ethics and ethos of connecting through a language. Also Read – Leslie doing new comedy special with NetflixGet ready for conversations around oral literature, media, and translations, along with poetry performances, folk art, stand-up comedy, theatre and cultural evenings. Beyond the language specific sessions, we cover some of the issues that have shaped our intellectual and social life in recent times: sessions on civil society, activism, dalit and women writing, alternative voices from literature, cinema, radio, publishing, gender violence, aspirations, dreams and voices of the marginalized, and above all the threats of a new form of patriotism that treats itself as a religion. This year too we are going to have with us a select panel of authors, lyricists, film-makers, media personalities, activists and performers. Some of the names are Anupam Mishra, Gulzar, Jerry Pinto, Ketan Mehta, Mahesh Bhatt, Mukul Kesavan, Meenakshi Reddy Madhavan, Piyush Mishra, Ravish Kumar, Sharda Sinha, Sanjay Kak, Shashi Deshpande, Shuddhbrata Sengupta and Varun Grover.The sessions would have reputed personalities as well as brave new voices that are increasingly making a space for themselves: Ashwini Kumar Pankaj, Anvita Abbi, Arjun Deo Charan, A. Jayaprabha, Arunesh Neeran, B.M. Hanif, Bhagwan Singh and others.last_img read more

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Five children injured in fire

first_imgNew Delhi: Five children received burn injuries in Shahbad Dairy area of Rohini district. Police claimed that they were inside the shanties when the incident was reported. The reason behind the incident is being investigated. Senior fire officials stated that the incident was reported at 1.25 pm from Shahbad area. “Two fire tenders were sent to the spot,” said the officer. The fire was reported from two shanties which were made on an empty plot. The fire was doused in one and half hours. Five children aged between four and nine years suffered burn injuries. “A nine-year-old received 90 percent injuries whereas another boy received 80 percent of injury,” said the fire officer.The other three children received 20 percent burn injuries. Deputy Commissioner of Police (Rohini) Rajneesh Gupta stated that the children were receiving treatment and they are investigating the reason behind the fire.last_img read more

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Businessman killed by goons in Daspur

first_imgKolkata: A businessman was brutally killed by some miscreants at Daspur in West Midnapore triggering tension amongst locals.The incident took place on Saturday night when the victim was returning home. Police have arrested one person in this connection. According to police, the victim, Sukhdeb Maity (50) was a conch seller and used to supply it to various shops in the district.It was alleged that the victim had supplied conches to local businessman Jagannath Samui but the latter was not paying him his due money. Family members of the victim said Samui had received conches and some other products worth nearly Rs 1 lakh from Maity but was not paying the money despite repeated requests. It was learnt that a quarrel broke out between the duo on Saturday morning over the non-payment of dues. Following the incident, Samui told the victim that he would pay his money and provided an address of an abandoned house in Tatarpur area of Daspur on Saturday evening. Also Read – Heavy rain hits traffic, flightsAfter his days work, the victim went to the place on late Saturday evening to receive his dues. When he reached there, Samui attacked him with a chopper. The victim fell to the ground after receiving several blows. He received severe injuries on various parts of his body. After hearing his screams, locals rushed to the spot and found him lying in a pool of blood. The locals rushed the victim to Ghatal Sub-divisional hospital where the doctors declared him brought dead. The body was sent for post-mortem. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedSome of the family members of the victim alleged that local Trinamool Congress-backed goons might have been behind the murder as one of the relatives of the victim was contesting Panchayat election in the BJP’s ticket. Police, however, suspect that a business rivalry might have led to the incident and there is no political angle.On the basis of the complaint lodged by the victim’s wife, police have arrested the other. A detailed probe is on. They are also investigating if the victim was murdered after he demanded the money or there is any other angle.last_img read more

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Having sex outside marriage is not empowerment Sonakshi

first_imgActress Sonakshi Sinha does not agree with her contemporary Deepika Padukone’s ideas about choice of freedom in My Choice, a video aimed at spreading awareness about women empowerment.The video shows Deepika talking about the freedom of choice that women must have regarding multiple issues, including having the choice to indulge in sex before marriage or out of marriage or not having sex at all.“Women empowerment is not always about the kind of clothes you wear, not about who you want to have sex with or stuff like that. It’s about employment, strength,” Sonakshi said here on Tuesday on being asked about her opinion on the video. Also Read – A fresh blend of fame“It’s a very good initiative. It’s coming from a good space, but honestly I believe empowerment should be given to the women who actually need it, who are kind of far away from where we are right now. We have been bred and brought up with luxury,” she added.My Choice, directed by Homi Adjania, calls for a change in the mindset of men about women and asks them to stop judging women for their choices of clothes, profession and life.She feels it needs to ‘reach out to people who actually need it, like the deep ends of this country’. Meanwhile, My Choice is getting mixed response on social media. While some people have praised Deepika’s efforts, some have trashed it.last_img read more

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Pandal collapse Negligence at fault say forensic experts

first_imgKolkata: Forensic experts have found in their preliminary investigation that negligence over erecting the structure on wet soil during monsoon without taking proper precaution was the reason that led to the collapse of a portion of a pandal during Prime Minister Narendra Modi’s address at Midnapore College Ground.A team of experts from the State Forensic Science Laboratory visited the spot and inspected the collapsed structure.Sources said that their investigation had revealed that more precaution should have been taken while setting up the structure. Also Read – Rain batters Kolkata, cripples normal lifeThere were deep puddles all over the ground. Since the soil was wet, it didn’t grip the structure properly and it has come up as one of the major causes behind the collapse of the pandal.It has also been found that the structure had also turned heavy due to the rainfall.It may be mentioned that some people had even managed to climb up the structure when the Prime Minister was addressing the rally. It also made the structure heavy and as per the forensic experts, it could have been another cause behind the collapse. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedA team comprising three senior officials from the Ministry of Home Affairs visited West Midnapore on Tuesday to probe the incident.The officers including Secretary (Security) S K Sinha and Joint Secretary Arti Bhatnagar held meetings with the District Magistrate and the Superintendent of Police of West Midnapore. They also visited the spot. They will be preparing a report in this connection.The district authorities are also preparing a report in this connection. Though initially it was claimed that there was negligence in the part of the Public Works Department, it was later found that it has executed its work without any fault. It has been stated that the Special Protection Group (SPG) plays a crucial role in such cases, as it was related to the security of the Prime Minister.A case has also been lodged under section 304 (punishment for culpable homicide not amounting to murder) of the Indian Penal Code in connection with the incident.Meanwhile, five persons were arrested in the past 24 hours on charges of attacking policemen, after the Prime Minister’s rally.last_img read more