Fighter jet training dome shows 360degree view

first_imgRP-360 dome: 360° immersive dome setup for flight training The company describes itself as specialists in “large-format projection technology.” Barco’s dome took several years of work. The dome’s development team started up in 2009.Barco’s dome is now carrying a clear message on launch that the simulator is not just another new version but the start of what Matthys calls “a new generation” of simulators.”We take care of the reflections in such a way that the system contrast is kept to a high level and this, in combination with high resolution and high brightness over 360 degrees, is a breakthrough in the industry.” The Barco R-360 flight simulation dome is introduced by the company as the first flight simulator to give trainee pilots a full unobstructed 360 degree view of the world. That view is via thirteen or fourteen 10 megapixel projectors. These projectors bathe the structure in light. Lasers are used to calibrate the projectors. The trainee pilot inside the dome experiences the virtual flight with the benefit of having a 360 degree, unobstructed view of surroundings. Pilots can look in any direction to find the resolution is so good that they can spot aircraft from 12 miles away. More information: www.barco.com/en/product/2337 (PhysOrg.com) — The word “simulation” can never be taken lightly in preparing fighter-jet pilots for combat. Training needs to provide simulated experiences that can bring the pilot closer to the scenarios to come. That requires state of the art systems including state of the art visuals. A new immersive 360-degree flight simulator from Barco has been introduced as an important step up in flight training. Explore further Citation: Fighter jet training dome shows 360-degree view (2011, October 16) retrieved 18 August 2019 from https://phys.org/news/2011-10-fighter-jet-dome-degree-view.html “If a pilot has a cockpit where he can see 360 degrees, he also needs to be trained in a system which supplies 360 degrees; all deviation from real life can be dangerous,” said Geert Matthys, Barco research and development manager.To simulate night flights as part of training, Barco’s projectors can display images in infrared. Wearing night vision goggles, pilots can see halo and blooming effects. The simulator is for use with several pilots working together to play out complex training missions, such as mid-air refueling, and can also be used to train pilots for solo sorties.Barco product details include 10-megapizel projectors with DynaColor (automatic color calibration across channels); brightness equalization across channels; edge blending for one seamless composite image; and warping (precise geometry correction for curved surfaces). The dome’s screens carry a special coating to raise the quality of the images. The sphere shape is intended to provide the pilot with constant eye relief. 3D, 360-degree fog display shown off (w/ video) © 2011 PhysOrg.com 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

Famed balloonist proposing huge inflatable solar updraft tower for observatory

first_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. (Phys.org) —Famed balloonist Per Lindstrand (he crossed the Pacific Ocean in one with Richard Branson back in 1991) has told The Engineer that he is proposing a 1km high inflatable solar updraft tower to power the ALMA Observatory in Chile’s Atacama Desert. Explore further More information: via The Engineer Entrepreneur receives funding for ‘tornado’ power generator © 2013 Phys.org Solar tower. Credit: drroyspencer Citation: Famed balloonist proposing huge inflatable solar updraft tower for observatory (2013, November 21) retrieved 18 August 2019 from https://phys.org/news/2013-11-famed-balloonist-huge-inflatable-solar.html Solar towers aren’t new of course, the idea has been bandied about for over a century. The idea is to draw heat from the sun at the base up inside the tower where the air current becomes strong enough to turn turbines. A group in Spain built a prototype in the 1980’s but it was decommissioned after just 8 years due to wear and tear and rust.Lindstrand is claiming that the way to go is to forego metal or cement, and construct the tower out of inflatable material—something he knows a lot about of course due to his ballooning background. Building a tower is something on a different order though, it would need to last a lot longer than a balloon to make it cost effective. Lindstrand envisions a coating that would make the flexible skin impervious to weather and UV radiation. He believes such a tower would not only last longer, but would be far cheaper to construct. He says he and his colleagues back at University College in London have calculated that it would cost approximately $750 million to construct a 1km tall solar tower out of cement—but one made of inflatable materials could be constructed for as little as $20 million. A tower like that, he says, would be able to generate 281GWh power annually. It’d be big too, with a base approximately 7km wide.Lindstrand and his team are currently working on a small proof of concept prototype that will be just 3.5m tall. If that proves successful, they expect to construct one that will be closer to 10 meters tall. Even if the second prototype is successful, however, it’s still not clear if the people who would make such a decision for ALMA Observatory would be willing to take such a gamble. Lindstrand notes that the desert environment would be an ideal location for such a tower due to the fine sand in the area that causes problems for traditional solar cell maintenance.last_img read more

Study shows airborne black carbon soot much worse than thought in China

first_img(Phys.org) —A team made up of researchers from France and China has developed a new model for describing the amount of black carbon soot pollution in the air. In their paper published in Proceedings of the National Academy of Sciences, the team describes how they used new data to allow for better describing more localized soot pollution levels and found that some parts of India and China have far more soot in the air (up to two or three times more in some areas) than other models have suggested. Explore further © 2014 Phys.org Citation: Study shows airborne black carbon soot much worse than thought in China and India (2014, January 28) retrieved 18 August 2019 from https://phys.org/news/2014-01-airborne-black-carbon-soot-worse.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. Home cooking, traffic are sources of key air pollutants from Chinacenter_img Journal information: Proceedings of the National Academy of Sciences Airborne black carbon soot is in essence, the charred remains of fossil fuels that didn’t fully burn due to insufficient oxygen—it’s little black particles floating in the air. In addition to being unsightly, it also poses a health hazard for those who breathe it in. Up till now, most reports on soot levels have been nationally based—levels of soot have been measured in the air in various parts of a country and then averaged together to give a single number for a particular country. The problem with this approach, of course, is that it fails to account for regional differences. Those living downwind from a coal plant, for example, are likely to have far higher levels of soot in their air than those living near a solar collection farm. Another less well known problem with soot models or reports regarding their levels, is the lack of accounting for the differing amounts of soot that result from different types of polluters, i.e. some coal plants produce much more soot then others. Also some soot results from other sources such as burning crops (rice fields, etc.) or from burning biofuels. All produce different amounts of soot.In this new effort, the researchers applied new fuel consumption data from various sources along with other new data that better describes how much soot different processes produce. The result is a model defined by regions, rather than countries, which the researchers claim has a bias reduction of −88 percent to −35 percent in Asia and indicates a whopping 130 percent higher worldwide concentration rate than that obtained from traditional country defined models.Because the team came up with such striking results, it’s likely other teams will join the effort to better estimate the true amount of soot people are breathing, which hopefully will lead to stronger efforts to reduce it. Black carbon Emissons, Gigagrams. Credit: (From T. Bond 2007) More information: Exposure to ambient black carbon derived from a unique inventory and high-resolution model, Rong Wang, PNAS, DOI: 10.1073/pnas.1318763111AbstractBlack carbon (BC) is increasingly recognized as a significant air pollutant with harmful effects on human health, either in its own right or as a carrier of other chemicals. The adverse impact is of particular concern in those developing regions with high emissions and a growing population density. The results of recent studies indicate that BC emissions could be underestimated by a factor of 2–3 and this is particularly true for the hot-spot Asian region. Here we present a unique inventory at 10-km resolution based on a recently published global fuel consumption data product and updated emission factor measurements. The unique inventory is coupled to an Asia-nested (∼50 km) atmospheric model and used to calculate the global population exposure to BC with fully quantified uncertainty. Evaluating the modeled surface BC concentrations against observations reveals great improvement. The bias is reduced from −88% to −35% in Asia when the unique inventory and higher-resolution model replace a previous inventory combined with a coarse-resolution model. The bias can be further reduced to −12% by downscaling to 10 km using emission as a proxy. Our estimated global population-weighted BC exposure concentration constrained by observations is 2.14 μg⋅m−3; 130% higher than that obtained using less detailed inventories and low-resolution models.last_img read more

Database of inbred mouse proteins responsible for strain discrepancies created

first_img Journal information: Proceedings of the National Academy of Sciences 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. Credit: CC0 Public Domain (Phys.org)—A trio of researchers affiliated with several institutions in Belgium has developed a bioinformatics tool that allows for comparing protein-coding genes of 36 inbred mouse strains to the C57BL/6J strain. In their paper published in Proceedings of the National Academy of Sciences, Steven Timmermans, Marc Van Montagu and Claude Libert describe the tool, the database they created using it and applications for other researchers. Citation: Database of inbred mouse proteins responsible for strain discrepancies created (2017, August 8) retrieved 18 August 2019 from https://phys.org/news/2017-08-database-inbred-mouse-proteins-responsible.html Study identifies unexpected mutation in commonly used research micecenter_img More information: * Database: bioit2.irc.ugent.be/prx/mousepost/Home.php* Research paper: Complete overview of protein-inactivating sequence variations in 36 sequenced mouse inbred strains, Steven Timmermans, PNAS, DOI: 10.1073/pnas.1706168114AbstractMouse inbred strains remain essential in science. We have analyzed the publicly available genome sequences of 36 popular inbred strains and provide lists for each strain of protein-coding genes that acquired sequence variations that cause premature STOP codons, loss of STOP codons and single nucleotide polymorphisms, and short in-frame insertions and deletions. Our data give an overview of predicted defective proteins, including predicted impact scores, of all these strains compared with the reference mouse genome of C57BL/6J. These data can also be retrieved via a searchable website (mousepost.be) and allow a global, better interpretation of genetic background effects and a source of naturally defective alleles in these 36 sequenced classical and high-priority mouse inbred strains. Explore further © 2017 Phys.org Scientists use mice to test out ideas, whether behavioral or physical, but as the researchers with this new effort note, not all strains of mice of a given species are the same. A gene mutation in one common strain, for example, can lead to colon polyps, while the same mutation in another strain does not. A failure to account for such characteristics can, quite obviously, lead to problems when researchers choose a strain of mice to conduct experiments. To overcome this problem, Timmermans, Van Montagu and Libert developed a tool to identify such differences between a standard strain and 36 others. Then, they used the tool to catalogue known differences in a database that could be accessed by other researchers.The researchers chose C57BL/6J as the comparative strain because it was the first to be sequenced. The other 36 strains that appear in the database have since also been sequenced. The tool they developed was essentially a technique for using available information about a sequenced strain, looking at the coding regions, computationally mutating them and then translating the DNA codons into their respective amino acid sequences—that allowed for predicting which mutations in which genes would impact which resultant protein. Those results were entered into the database along with other known information obtained through other studies.As the team notes, much of the information in the database has been publicly available for some time, but unfortunately for researchers, not in a single place—they had to do a quite a lot of work to ensure they were not choosing a strain inappropriate for their planned work. Now, all they have to do is search a single database, the results of which will only improve as more data is added when new discoveries are found. The hope is that the database will ease and therefore improve experimental design, resulting in better results.last_img read more

First earlytype magnetic star in an eclipsing binary detected

first_img © 2018 Phys.org Astronomers report the discovery of the first known early-type magnetic star in an eclipsing binary system. The finding, detailed in a paper published April 27 on the arXiv pre-print server, could have important implications for our understanding of the evolutionary process of binary stars. Magnetic field topology of the primary component of HD 66051. Distribution of the radial magnetic field component (colour plot) and the field vector orientation (red and blue vectors) are shown at four rotation phases. The field strength is given in gauss. The star is shown at the inclination angle of 86 degrees. Credit: Kochukhov et al., 2018. Explore further Citation: First early-type magnetic star in an eclipsing binary detected (2018, May 9) retrieved 18 August 2019 from https://phys.org/news/2018-05-early-type-magnetic-star-eclipsing-binary.html More information: HD66051: the first eclipsing binary hosting an early-type magnetic star, arXiv:1804.10537 [astro-ph.SR], arxiv.org/abs/1804.10537AbstractEarly-type magnetic stars are rarely found in close binary systems. No such objects were known in eclipsing binaries prior to this study. Here we investigated the eclipsing, spectroscopic double-lined binary HD66051, which exhibits out-of-eclipse photometric variations suggestive of surface brightness inhomogeneities typical of early-type magnetic stars. Using a new set of high-resolution spectropolarimetric observations, we discovered a weak magnetic field on the primary and found intrinsic, element-dependent variability in its spectral lines. The magnetic field structure of the primary is dominated by a nearly axisymmetric dipolar component with a polar field strength Bd≈600 G and an inclination with respect to the rotation axis of βd=13o. A weaker quadrupolar component is also likely to be present. We combined the radial velocity measurements derived from our spectra with archival optical photometry to determine fundamental masses (3.16 and 1.75 M⊙) and radii (2.78 and 1.39 R⊙) with a 1-3% precision. We also obtained a refined estimate of the effective temperatures (13000 and 9000 K) and studied chemical abundances for both components with the help of disentangled spectra. We demonstrate that the primary component of HD66051 is a typical late-B magnetic chemically peculiar star with a non-uniform surface chemical abundance distribution. It is not an HgMn-type star as suggested by recent studies. The secondary is a metallic-line star showing neither a strong, global magnetic field nor intrinsic spectral variability. Fundamental parameters provided by our work for this interesting system open unique possibilities for probing interior structure, studying atomic diffusion, and constraining binary star evolution. Early-type magnetic stars are almost absent in close binary systems, and no such star was found in an eclipsing binary by previous studies. Astronomers propose several theories that could explain this scarcity. For instance, some researchers assume that the presence of a strong global primordial magnetic field inhibits protostellar cloud fragmentation, what disfavors formation of multiple systems.A recent study conducted by a team of astronomers led by Oleg Kochukhov of the Uppsala University in Sweden, could be helpful in determining the most plausible hypothesis regarding the lack of binary systems containing early-type magnetic stars. As part of the research, they observed HD 66051, an eclipsing, spectroscopic double-lined binary, whose photometric variations suggested the presence of an early-type magnetic star. The observations were carried out in December 2016 and January 2017 using the ESPaDOnS spectropolarimeter at the Canada-France-Hawaii Telescope (CFHT) in Hawaii.”Using a new set of high-resolution spectropolarimetric observations, we discovered a weak magnetic field on the primary and found intrinsic, element-dependent variability in its spectral lines,” the researchers wrote in the paper.As noted in the study, Kochukov’s team found the presence of a global, predominantly dipolar magnetic field on the surface of the primary component of HD 66051. The observations show that HD 66051 A is a magnetic, chemically peculiar star of spectral type B with a non-uniform surface distribution of chemical abundances.The finding makes HD 66051 A the only early-type magnetic star in an eclipsing binary detected so far. Moreover, it is one 10 such stars in close double-lined binary systems.The researchers also found that the secondary component of HD 66051 is a metallic-line star exhibiting neither a strong, global magnetic field nor intrinsic spectral variability. They also calculated the size and mass of both objects in the system. According to the study, HD 66051 A is almost 2.8 times larger and nearly 3.2 times more massive than our sun, while HD 66051 B has a radius of about 1.39 solar radii and a mass of approximately 1.75 solar masses.The astronomers concluded that their findings regarding the HD 66051 system open unique possibilities for detailed stellar interior structure and evolution studies.”For example, one could exploit HD 66051 to test stellar structure models with radiatively driven chemical stratification and put firm limits on the radius modification due to interior non-force-free magnetic fields. One could also probe other poorly understood interior structure processes such as mixing in the radiative zone, convective core overshoot, etc.,” the authors concluded. Magnetic fields discovered in two hot evolved stars 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

slams RBI Guv rajans views on Make in India strategy

first_imgRejecting RBI Governor Raghuram Rajan’s criticism of ‘Make in India’ programme, Finance Minister Arun Jaitley on Monday said it is about manufacturing of quality products at low costs and it was not relevant whether they are sold in India or abroad.“Whether Make in India is made for consumers within India or outside is not so relevant. The principle today says that consumers across the world likes to purchase products which are cheaper and are of good quality. They hire services which are cheaper and good quality,” Jaitley said here.Earlier this month, Rajan had sounded a word of caution about the new government’s ‘Make in India’ campaign, saying it assumes an export-led growth path of China and it should rather be ‘Make for India’ with a focus on manufacturing products for the domestic market.last_img read more

HC extends stay on poll process by a day

first_imgKolkata: The Calcutta High Court on Tuesday further extended its stay on the Panchayat poll process by another day. A single-judge bench of Justice Subrata Talukdar will hear the arguments by both the parties again in the first half on Wednesday.Justice Talukdar on Monday had extended the original stay on the election process till April 16 by one day till Tuesday, in view of an appeal filed before a division bench of the court against the stay.On Tuesday, Trinamool counsel Kalyan Banerjee, arguing about the maintainability of the petitions filed by BJP and CPI-M accusing the ruling party of pre-poll violence in the state, said that under Article 243(3) of the Indian Constitution, the court cannot interfere after the poll process has kicked off. Also Read – Heavy rain hits traffic, flightsBanerjee pleaded that the election process is getting delayed and urged Justice Talukdar to lift the stay. He also cited a judgment of 2000, between one Ashok Kumar and the Election Commission, in this regard.Justice Talukdar said that the court had to interfere after the state Election Commission (SEC) extended the date of filing nominations by a day, but revoked it in less than 24 hours.Banerjee also questioned the intention of BJP, citing that they have filed 38,185 nominations, but are still alleging that they had been prevented from doing so.Interestingly, during the hearing on Tuesday, Justice Talukdar said on a lighter note that it seems that the matter will not end at this bench. Taking the cue from his statement, Banerjee said that he had also thought on the same lines. According to legal experts, the discussion is a clear indication that the Panchayat poll matter will go to the Supreme Court.last_img read more

Land allocation slowing down work of KMC night shelters

first_imgKolkata: The Kolkata Municipal Corporation’s attempts in setting up night shelters in the city has not picked up its desired pace due to non-cooperation from central agencies in allocating land for the purpose.”Central agencies like the Railways and Kolkata Port Trust have a lot of abandoned land scattered here and there in the city. But they are not cooperating with us in allocating land for the project. We had held three meetings in this regard in the last three months, but their officials had attended only the first meeting,” Member, Mayor-in-Council (Bustee Development) Swapan Samaddar said. Also Read – Rain batters Kolkata, cripples normal lifeIt may be mentioned that the Supreme Court had prodded all the states in the country for setting up such shelters and has set a target of one such shelter per one lakh people.At present, Kolkata has around 40 night shelters, of which 35 have been set up by the state government and five by the KMC, all of which are single-storeyed.”We have already prepared the detailed plan for five night shelters and are awaiting allocation of funds from the state Municipal Affairs department. Construction work will start soon. These shelters will come up at wards 2, 5, 36, 133 and 57,” a senior KMC official added. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedThe new night shelters will be either two or three-storeyed, for accommodating a large number of people. Finding land for construction of such night shelters is a problem and Samaddar is holding meetings every month with KMC officials of the borough level, state agencies like the Kolkata Metropolitan Development Authority (KMDA), Kolkata Improvement Trust (KIT), Hooghly River Bridge Commissioners (HRBC) and central agencies.The five existing KMC night shelters at Chetla, Bhowanipore, Galiff Street, Gauribari Lane and Raja Manindra Road can accommodate around 2,500 people on a daily basis.last_img read more

Bridge collapse Traffic snarls continue in city

first_imgKolkata: Closure of a part of arterial Diamond Harbour Road owing to collapse of a section of Majerhat bridge caused huge traffic snarls since morning on Thursday, leading to delays and frayed nerves of commuters. Police said apart from diversion of traffic owing to the collapse, a political programme at Esplanade in the heart of the city and another at Howrah bridge also affected traffic movement in the city during the day. Long queues of vehicles were seen in many roads in the southern and western parts of the city, as also in the Kolkata-bound stretch of Kona Expressway connecting national highways to Mumbai and Delhi. Also Read – Rain batters Kolkata, cripples normal life People going to work, schools and colleges were stuck in public and private vehicles, which took more than double the time taken usually to reach their destinations. Traffic were at a standstill or moving at a snail’s pace on roads through which these were diverted owing to the closure of DH Road at Majerhat area. Sahapur Road, Hide Road, Alipore Road and many other avenues connecting the south-western parts of the city and vast areas of South 24 Parganas district took most of the diverted traffic load, police said. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killed The Kona Expressway connecting national highways 6 (Mumbai Road) and 2 (Delhi Road) with the city through Vidyasagar Setu over the river Hooghly was also crammed with heavy goods vehicles which were entering the city’s port and trading hubs through the night. With goods traffic entry to port and other places in the south having been restricted since Tuesday’s bridge collapse, a huge number of heavy vehicles were entering the city last night leading to the jam, police said. A political programme at Esplanade that was attended by hundreds of people coming from districts and a protest programme on high petrol and diesel prices by the Congress on Howrah bridge also affected traffic movement in the city, police said. “It takes an hour for me to reach the IT hub at Salt Lake Sector V where I work from my residence at Behala, but now it is taking nearly double the time,” said Subho Ganguly, a commuter. A student who used to reach his school at Kidderpore in just over 15 minutes from Behala, the worst affected area in south-west Kolkata owing to the bridge collapse, Thursday reached in nearly an hour, his father Kallol Nag said. “It is going to be a nightmare for people living in Behala with the Durga Puja approaching,” said Ratri Banerjee, a school teacher who resides at Sakherbazar area of Behala. Traffic restrictions are imposed to ensure smooth movement of vehicles during the Durga Puja when a large number of people came on the road for pandal hopping.last_img read more

Enchanted by Poetry

first_imgLiterary works, in which the expression of feelings and ideas are given intensity by the use of distinctive style and rhythm, are collectively known as poems or as a genre of literature. ‘He felt a desire to investigate through poetry the subjects of pain and death she glanced at the papers and saw some lines of poetry he is chiefly famous for his love poetry’.Kolkata, the City of Joy, witnessed an evening of recitation on January 16, by Chhanda Roy at Rabindra Sadan. The audience remained glued to their seats till the end engrossed in the beautiful recitation of thirty poems. The evening started with the Saraswati Vandana and was followed by the poems by Tagore, Kazi Nazrul Islam, Satyendranath Dutta, Birendra Chattopadhyay, Shubho Dasgupta, Devesh Thakur, Mallika Sengupta and many others. She recited peoms like ‘Kishori’ by Bikash Das, Kazi Nazrul’s ‘Basanti’ in the presence of the Chief Guest Swami Suparnananda Maharaj. Also Read – ‘Playing Jojo was emotionally exhausting’In the words of Lewis Carroll, “Children yet, the tale to hear, eager eye and willing ear, lovingly shall nestle near. In a wonderland they lie, dreaming as the days go by, dreaming as the summers die… Ever drifting down the stream…Lingering in the golden gleam…Life, what is it but a dream?Some poetry types are specific to particular cultures and genres and respond to characteristics of the language in which the poet writes. Readers accustomed to identifying poetry with Dante, Goethe, Mickiewicz and Rumi may think of it as written in lines based on rhyme and regular metre, there are, however, traditions, such as Biblical poetry, that use other means to create rhythm and euphony. Much modern poetry reflects a critique of poetic tradition, playing with and testing, among other things, the principle of euphony itself, sometimes altogether forgoing rhyme or set rhythm.In today’s increasingly globalised world, poets often adapt forms, styles and techniques from diverse cultures and languages.last_img read more