Design chosen for British 1000 mph car w Video

first_img The driver of the Bloodhound SSC (SuperSonic Car), Andy Green, set the world land speed record of 763 mph (1,228 km/h) in Thrust SSC in 2007. Green said he hoped the car would be ready to try to beat the record in 2011. The record attempts will be made in South Africa’s Hakskeen Pan in the Northern Cape Province. Wing Commander Green, an RAF fighter pilot, said the pan is perfect because the surface of the dried-out lake can support the car but is soft enough to allow the titanium or carbon-reinforced aluminum wheels to sink perhaps one centimeter, which would give the car needed damping or compliance to help him to steer the car at lower speeds. (At higher speeds it steers more like a speedboat than a car.) The track will be 10 miles (16 km) long. Nissan’s new concept car ‘feels like flying’ (w/ Video) More information: www.bloodhoundssc.com/© 2009 PhysOrg.com Explore further Citation: Design chosen for British 1,000 mph car (w/ Video) (2009, November 25) retrieved 18 August 2019 from https://phys.org/news/2009-11-chosen-british-mph-car-video.html (PhysOrg.com) — A British team hoping to be the first to get a car to 1,000 mph (1,610 km/h) has made its final design selection. The six-tonne car, known as the Bloodhound, will be powered by a Eurofighter jet engine mounted above a hybrid rocket, and will be built in Bristol, UK. 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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The dance of hot nanoparticles

first_imgHeated nanoparticles “shine” in their solvent. Image credit: Daniel Rings Citation: The dance of hot nanoparticles (2010, September 8) retrieved 18 August 2019 from https://phys.org/news/2010-09-hot-nanoparticles.html Explore further Physicists prove Einstein wrong with observation of instantaneous velocity in Brownian particles 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 This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. (PhysOrg.com) — “Brownian motion is a very old concept,” Klaus Kroy tells PhysOrg.com. “The laws explaining it were formulated more than a century ago by Albert Einstein. However, we are finding some interesting divergences from what has been known for all these years.” Brownian motion is the random movement of small particles dissolved in a liquid or gas. It is the result of the particles’ collisions with the solvent molecules. Kroy is a theoretical physicist at the University of Leipzig, Germany. Together with his experimental colleague, Frank Cichos, also at the university, he investigated the non-equilibrium Brownian motion of hot nanoparticles, so-called “Hot Brownian motion”. The team’s work has been published in Physical Review Letters.When Einstein wrote his seminal paper in 1905, he assumed that a particle would be at the same temperature as the solvent. However, this doesn’t take into account how a heated particle affects the surrounding solvent. For anyone interested in trapping or tracking nanoparticles with light, this idea of Einstein’s has to be reinvestigated because the particles heat up due to optical absorption.Kroy, Cichos and their colleagues used a focused laser to heat gold nanoparticles suspended in water and observed what happened. The result of the experiment showed that the viscosity and temperature “felt” by the heated nanoparticle are not the surface conditions. Instead, the values that relate to the hot Brownian motion need to be calculated over the whole solvent, as predicted by the new theory put forward by the team.Using this theory, it becomes possible to precisely control and manipulate the way the nanoparticles move in the liquid. “We show how to use the temperature to speed the particles in the liquid. Brownian motion is doing all the action, but we can use a laser aimed at the particles to change how fast they are moving,” Cichos says.One of the ways to direct the motion is to prepare asymmetric particles that have gold on only one side. “A heat kick comes from the one side,” Cichos explains, “and this can be exploited for moving particles around with a laser.” Similarly, other groups have exploited the heating of nanoparticles stuck in a biomembrane to mobilize them. “The trick will also work with other frozen matrices that can be molten by the heat emitted from the nanoparticle,” he explains.Biology offers ample opportunities for applications of new photothermal technologies. Many researchers in biology use nanoparticles as markers. They can be attached to biomolecules and cell organelles, and their transport can then be tracked inside a cell, or anywhere else in a living organism. “However, you need to be able to see these tiny particles,” Cichos says. At Leipzig University, the team modulated the heat of the laser to make the nanoparticles “shine” periodically. It works like a lighthouse, so that the nanonparticles can be detected virtually without perturbing background noise, offering an alternative to some of the current methods used to make biomarkers visible.Another benefit of the new developments from Germany includes the fact that they provide the basis for a quantitative analysis of all experiments that use light to confine particles. “The trapping of nanoparticles with optical tweezers has become indispensible for many experiments and applications,” Kroy points out. “But to gain a precise control over this technique, we first need to understand how hot particles move. This is why we are shedding some more light on Brownian motion, showing that there is still more to learn.” More information: Daniel Rings, Romy Schachoff, Markus Selmke, Frank Cichos, and Klaus Kroy, “Hot Brownian Motion,” Physical Review Letters (2010). Available online: link.aps.org/doi/10.1103/PhysRevLett.105.090604 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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New evidence helps explain why some soft tissue fossilizes better than others

first_img(Phys.org)—A small team of researchers with the University of Bristol in the UK and another with Uppsala University in Sweden has found a reason for why soft tissue in some species fossilizes better than others. In their paper published in Proceedings of the Royal Society B, Aodhán Butler, John Cunningham, Graham Budd and Philip Donoghue describe a study they carried out that involved analyzing how a type of shrimp decays. Citation: New evidence helps explain why some soft tissue fossilizes better than others (2015, May 13) retrieved 18 August 2019 from https://phys.org/news/2015-05-evidence-soft-tissue-fossilizes.html Journal information: Proceedings of the Royal Society B Explore further 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. For many years scientists have debated whether the “Cambrian Explosion” was the result of more species suddenly developing or whether it was just the result of more remains being fossilized and found. In this new effort, the researchers suggest it might have had to do with the development of the anus and a through-gut.Finding soft tissue fossils is rare, and when it does occur, the fossils are typically only small portions of the deceased organism, and more often than not, those pieces were once a part of a digestive system. Why this is has not been well studied the team noted, so they decided to look into it. To learn more they studied the process by which brine shrimp decay—the little creatures are nearly transparent, thus it was possible to watch the bacteria inside of them go to work after the shrimp died.In watching the process of decomposition, the team noted that bacteria in the gut set to work right away, multiplying massively as they engaged in eating the dead tissue around them, so much so that they completely filled the cavity and eventually caused it to burst, which gave them access to other internal organs. If the shrimp was in a low oxygen environment when it died, such as being buried in sand, then most of the decomposition occurred from the inside, and then stopped as the bacteria ran out of air. But, because gut bacteria carry a lot of calcium and/or phosphates and because they form biofilms, after they died, they left behind a mold of sorts that showed the form of the gut organs of their dead host.The researchers believe that it was the mold left behind by gut bacteria that is actually what is found with soft tissue fossils, and thus, it appears a possibility that part of the “Cambrian Explosion” was due to the development of an anus and through-gut—because they harbor much more gut bacteria.center_img © 2015 Phys.org Generalized decay sequence in Artemia (a–g) and comparison to Burgess Shale-type fossils (h–i). (a) Undecayed specimen. (b) Thoracopods become matted. (c) Body and limbs (arrow) becomes opaque due to microbial activity. (d) Cuticle shrinks; some distal podomeres are disarticulated, cloudy appearance of limbs indicates internal biofilm. (e) Cuticle fails, internal biofilm is lost. (f) Cuticle disintegrates into fragments. (g) Only the unsupported gut remains. (h) Opabinia specimen (Burgess Shale, BC, Smithsonian National Museum of Natural History Washington DC, USNM 155600) showing the gut and associated microbial fabrics. (i) Enlargement of Opabinia gut area (Burgess Shale, BC, Geological Survey of Canada GSC 40251). Dark area, g gut; gf grey features corresponding to structures interpreted as gut diverticulae or limbs, bc lighter areas, body cavity. Scale bar: (a–c,i) = 2 mm, (d–g) = 1 mm, (h) = 10 mm. Credit: (c) Proceedings of the Royal Society B, DOI: 10.1098/rspb.2015.0476 ‘Zombie’ bacteria found able to kill other bacteria More information: Experimental taphonomy of Artemia reveals the role of endogenous microbes in mediating decay and fossilization, Proceedings of the Royal Society B, DOI: 10.1098/rspb.2015.0476AbstractExceptionally preserved fossils provide major insights into the evolutionary history of life. Microbial activity is thought to play a pivotal role in both the decay of organisms and the preservation of soft tissue in the fossil record, though this has been the subject of very little experimental investigation. To remedy this, we undertook an experimental study of the decay of the brine shrimp Artemia, examining the roles of autolysis, microbial activity, oxygen diffusion and reducing conditions. Our findings indicate that endogenous gut bacteria are the main factor controlling decay. Following gut wall rupture, but prior to cuticle failure, gut-derived microbes spread into the body cavity, consuming tissues and forming biofilms capable of mediating authigenic mineralization, that pseudomorph tissues and structures such as limbs and the haemocoel. These observations explain patterns observed in exceptionally preserved fossil arthropods. For example, guts are preserved relatively frequently, while preservation of other internal anatomy is rare. They also suggest that gut-derived microbes play a key role in the preservation of internal anatomy and that differential preservation between exceptional deposits might be because of factors that control autolysis and microbial activity. The findings also suggest that the evolution of a through gut and its bacterial microflora increased the potential for exceptional fossil preservation in bilaterians, providing one explanation for the extreme rarity of internal preservation in those animals that lack a through gut.last_img read more

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Two beaten up arrested for supplying flesh of dead animals to eateries

first_imgKolkata: Locals beat up two youth and handed them over to the police after they were found taking away flesh of dead animals from a dump yard in Budge Budge in order to supply it to different eateries and restaurants.Locals often used to find the duo moving around the dump yard and it led to their suspicion. It was on Thursday when some of the locals followed them and they were caught cutting flesh from the bodies of dead animals thrown in the dump yard. One of the youth was Raja Mallick and the other was a taxi driver named Milsel Shyamlal. They used to pack the flesh and take it to a place at Kabardanga in the extreme southern part of the city in the taxi. Also Read – Heavy rain hits traffic, flightsFinding the locals approaching them, the taxi driver attempted to flee. But he was caught red-handed.Raja told locals that they used to take it to Kabardanga where they used to hand it over to a person who used to process it and pack it in small plastic bags. The same person then used to supply it to a section of eateries in and around the city.The mob turned irate when they their suspicion turned true and allegedly manhandled the duo. The taxi was also damaged. Police went to the spot and brought the situation under control. They were handed over to the police and detained subsequently.Police came to know about two other youth – Sunny and Nimai – who are also allegedly involved in it. Cops have initiated a search for the same. Police suspect involvement of more people in this connection.Police will take both of them to the place at Kabardanga where they used to supply the same.last_img read more

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Portion of Shibpur crematorium in shambles

first_imgKolkata: The beautification programme of Shibpur crematorium in central Howrah couldn’t take off well due to lackadaisical attitude of the Howrah Municipal Corporation (HMC).The initiative, taken up by Chief Minister Mamata Banerjee two years ago, was supposed to beautify the century-old crematorium and its neighbourhood. While a part of the crematorium has been beautified and well kept, the other part mainly where mourners sit is a victim of abject neglect. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedThere is a place adjacent to the crematorium and on the banks of River Hooghly that was developed so that mourners could get a green and clean place to sit. Though the portion where a rest room has come up is well-maintained, the place just opposite it needs proper maintenance as despite all infrastructures it cannot be used properly at present. The infrastructure was created a few years ago with an idea of developing a better space where mourners can sit. The area was beautifully fenced and concrete seats with marble tops were also constructed. But with lack of maintenance, it is hardly fit for a person to go and sit there. Also Read – Naihati: 10 councillors return to TMC from BJPThere was no regular cleaning and empty alcohol bottles have been found strewn all over the place. The drains were clogged with dry leaves and soil. As a result of this accumulation of water, it has become the breeding ground of mosquitoes. Many of the concrete seats were found now being used for drying clothes and the rest are covered with weeds and bushes which have grown due to lack of regular maintenance.Shyamal Mitra, Member Mayor-in-Council (Burning Ghat and Burial Ground), said: “There is pending litigation in connection with the plot. But initiatives will be taken for proper illumination of the place and cleaning of the garden so that no anti-social activities take place there.”last_img read more

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18yearold sexually abused by 5 in Jalpaiguri

first_imgDarjeeling: Jalpaiguri woke up to a horrific incident of gang rape on Wednesday. An 18-year-old was allegedly sexually abused by 5 youths. Police have arrested two. A manhunt has been launched for others.On Tuesday night, the victim had left her residence on a bicycle to visit the house of her elder sister. A short distance away, a street food vendor Madan Das blocked her way along with his friend Biswajit Rai. They forcefully took the victim to a nearby building that was under construction. They allegedly abused her there. In the meantime, Hira Rai, Subrata Rai and Bishu Das arrived at the spot. They too allegedly sexually abused her. However, a light bulb in the building attracted the attention of a neighbour who arrived to investigate. On seeing him, the 5 perpetrators fled and noticing the victim in a critical condition, the neighbour rushed her to hospital. The family members of the victim have filed a complaint at the police station. “Two persons have been arrested and a manhunt has been launched for others,” stated Upasana Gurung, police officer.last_img read more

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Globalising Indian Art

first_imgWith the mission of bringing back the essence of old classical art form in modern and contemporary art, Delhi College of art is trying its best to maintain and empower the roots of Indian art through organising Art collage Carnival every year. It would be 15th edition of the same this year. This helps artists and art students to demonstrate their masterpiece. It also builds their capacities to preserve our traditions and cultures with old classical unique art forms which are also called the interactive art that may be understood even by a layman. It disseminates art intelligence to spread the beauty of it across different cultures and countries. Also Read – Add new books to your shelfThis way, collage art carnival depicts the same philosophy in an all new initiative medium by the students of Delhi College of Art to bring back the old form of art which has somewhere lost its charm. As per the trend of previous versions, the forthcoming carnival is also going to spread its own aura of awesomeness.Delhi college of Art has come up with several initiatives to promote and brand Indian artwork; and this carnival is one of its success stories. Art does not believe in putting some differentiation in terms of geographical divisions. Believing the same, the institution is also giving their students an opportunity to visit places like Rome and Paris which are very much known for its rich contribution to art. These places will certainly place exposure to the students that will help them to think beyond the box and every conditioning that was placed within the boundary. This way, the students are not only getting a chance to learn, but also getting an opportunity to master their art and spreading Indian art and culture outside the country.This carnival provides an internationally acclaimed platform to the artists to showcase their creativity across the world and convey Indian art beyond the boundary. At the exhibition, around 200 students will showcase paintings from every branch of Delhi college of art.last_img read more

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Walking just 35 minutes daily can reduce stroke risk in elderly

first_imgOlder adults can prevent their risk of strokes by taking a daily stroll for just 35 minutes a day or four hours a week, say researchers. Indulging in moderate physical activity, such as swimming, brisk walking, or running two to three hours a week may also reduce the severity of strokes than people who are physically inactive. “Stroke is a major cause of serious disability, so finding ways to prevent stroke or reduce the disability caused by stroke are important,” said Katharina S. Sunnerhagen, from the University of Gothenburg in Sweden. Also Read – Add new books to your shelf”While exercise benefits health in many ways, our research suggests that even simply getting in a small amount of physical activity each week may have a big impact later by possibly reducing the severity of a stroke,” she added. For the study, published in the journal Neurology, the team identified 925 people with an average age of 73 who had a stroke. Of the 481 people who were physically inactive, 354 or 73 per cent had mild stroke. Of the 384 who engaged in light physical activity, 330 or 85 per cent had mild stroke. Of the 59 people who engaged in moderate physical activity, 53 or 89 per cent had mild stroke. Also Read – Over 2 hours screen time daily will make your kids impulsivePeople who engaged in light to moderate physical activity before their stroke were twice as likely to have a mild stroke rather than a moderate or severe stroke when compared to people who were physically inactive, the researchers said. “There is a growing body of evidence that physical activity may have a protective effect on the brain and our research adds to that evidence,” Sunnerhagen said. The study does not prove that physical activity reduces stroke severity; it only shows an association, she noted.last_img read more

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Man held for creating fake profile of Kolkata mayor

first_imgKolkata:One person has been arrested from Nadia district of West Bengal for allegedly opening a fake account in the name of Kolkata Mayor Firhad Hakim on social media and posting objectionable comments, police said on Sunday. Tarun Kumar Ghosh (40), a resident of Buichara Para in Nabadwip was apprehended on Saturday night from his residence for creating a fake profile of Hakim and spreading false information, a senior police officer said. When produced at a city court on Sunday, Ghosh was sent to police custody till June 22, he added.last_img

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The Imperial to host an exotic French affair

first_imgThe great global event, ‘Goût de France / Good France’ will be celebrating its 5th annual edition on March 21, 2019, and ‘Nostalgia’ at ‘1911 Brasserie’ – a proud purveyor of classic western cuisine in the capital since 2011 – is chosen to be a part of the largest dinner in the world featuring 5000 restaurants across 5 continents. The Good France menu at Nostalgia, The Imperial will pay a tribute to the excellence of French cuisine and will showcase a menu using fresh and seasonal regional produce. Also Read – Add new books to your shelfA combination of old world charm coupled with an unparalleled French menu featuring authentic recipes across aperitif and canapés, entrée, main course and dessert promises a distinct dining experience. More than 70 restaurants have been selected across India by the committee of international chefs headed by Chef Alain Ducasse, placing India among the top participating countries. The traditional and rare European theme around which ‘Nostalgia’ at ‘1911 Brasserie’ makes it an ideal property to promote this glorious French dinner. Also Read – Over 2 hours screen time daily will make your kids impulsiveThis extraordinary evening will have a delectable array of signature French dishes, in the backdrop of a venue that makes you experience the old Hollywood glamour. Chef Prem K Pogakula, Executive Chef at The Imperial will be cooking up a French-style dinner, with a focus on more responsible cuisine. “French food is based on local sourcing of very simple ingredients paired with good-old wine and hand-picked variety of cheese. The cuisine has already been influenced in terms of standardising menus and presentation so the day is not far when Indians will be more familiar with French specialties and classic ingredients. The French culinary events like Good France is a great initiative to promote French gastronomy in India and it’s an honour for The Imperial to be part of an international gourmet at a global level. We at ‘Nostalgia’ use exclusive French cheese, cream, butter, and meats to keep the local flavors intact and these local ingredients only help in achieving a perfect dish which the French guests relish,” said Chef Prem.last_img read more

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