New camouflage technology from BAE hides war machines

first_img BAE Systems Selected to Develop Humvee on-Board Vehicle Power System More information: Press release (PhysOrg.com) — BAE Systems says it has a camouflage system that can render battle machines like tanks invisible or even seen as other objects in the immediate environment to protect against attack. The ‘cloak’ applied to a tank, which is BAE’s illustrated object to showcase its Adaptiv technology, can enable the tank to blend into the environment undetected or to look like another object entirely, avoiding night vision surveillance equipment and infrared targeting by aircraft. In so doing, the Adaptiv technology can mask the vehicle’s infrared signature. Explore further The Adaptiv cloak consists of a sheet of hexagonal hand-sized patches, or as BAE calls them, pixels. Their thermo electric material can switch temperatures quickly. On-board thermal cameras are what drive the panels, picking up whatever scenery is around and then showing that image on the vehicle. Around 1,000 of these panels can cover a small tank.BAE field-tested its technology on a Swedish CV90 tank made to blend into the scenery without detection. Alternatively, the pixels can protect gear by manipulating their appearance. Tanks can be made to look like cars, large rocks, trucks,or cows, for example.The Swedish Defence Materiel Administration (FMV), helped fund BAE’s project; use of the infra-red spectrum in warfare has been an important focus for them.BAE estimates that the technology could be ready for production in two years. Later this month BAE will demonstrate the technology on a CV90 tank at the UK Defense and Security Equipment International exhibition from September 13 to 16. According to reports, research about the Adaptiv approach has been submitted to Britain’s Ministry of Defence.Since the days when infantry men marched in confidence wearing helmets with hanging leaves, technology has come a long way and has a way to go in the use of camouflage in the face of modern weapons. BAE sees its Adaptiv technology as a breakthrough, however. Past attempts have entailed excessive power requirements and that’s where Adaptiv stands out. Adaptiv project manager Pader Sjolund in a statement said Adaptiv panels in contrast consume relatively little power. “Our panels can be made so strong that they provide useful armor protection and consume relatively low levels of electricity,” he said.No doubt developments and ideas to address camouflage for warfare will continue in and outside BAE Systems. “Invisibility cloaks” is a topic of research that has been explored for some time. In 2006, Sir John Pendry at Imperial College London, led a group that focused on a “transformation optics” technique that involves the design of materials that steer light around objects, making them disappear from view.center_img © 2011 PhysOrg.com Citation: New camouflage technology from BAE hides war machines (2011, September 7) retrieved 18 August 2019 from https://phys.org/news/2011-09-camouflage-technology-bae-war-machines.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.last_img read more

Australian researchers show flower color evolution driven by bee preferences

first_img More information: Parallel evolution of angiosperm colour signals: common evolutionary pressures linked to hymenopteran vision, Proceedings of the Royal Society B, Published online before print June 6, 2012, doi: 10.1098/rspb.2012.0827AbstractFlowering plants in Australia have been geographically isolated for more than 34 million years. In the Northern Hemisphere, previous work has revealed a close fit between the optimal discrimination capabilities of hymenopteran pollinators and the flower colours that have most frequently evolved. We collected spectral data from 111 Australian native flowers and tested signal appearance considering the colour discrimination capabilities of potentially important pollinators. The highest frequency of flower reflectance curves is consistent with data reported for the Northern Hemisphere. The subsequent mapping of Australian flower reflectances into a bee colour space reveals a very similar distribution of flower colour evolution to the Northern Hemisphere. Thus, flowering plants in Australia are likely to have independently evolved spectral signals that maximize colour discrimination by hymenoptera. Moreover, we found that the degree of variability in flower coloration for particular angiosperm species matched the range of reflectance colours that can only be discriminated by bees that have experienced differential conditioning. This observation suggests a requirement for plasticity in the nervous systems of pollinators to allow generalization of flowers of the same species while overcoming the possible presence of non-rewarding flower mimics.Press release Photographic reconstruction of how bee vision would see a flower, which appears yellow to human eyes. The cost of long tongues 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: Proceedings of the Royal Society B © 2012 Phys.Orgcenter_img (Phys.org) — A team of researchers in Australia has shown that the evolution of flowers in that country was driven by the preferences of bees, rather than the other way around. In their paper published in the Proceedings of the Royal Society B, the team describes how they gathered over a hundred samples of different flowers and then compared them against the types of colors that bees best identify and then compared those results with research findings regarding bees and flowers in North America. Explore further Citation: Australian researchers show flower color evolution driven by bee preferences (2012, June 7) retrieved 18 August 2019 from https://phys.org/news/2012-06-australian-evolution-driven-bee.html The research team, led by Adrian Dyer, began their study based on research already conducted by other scientists looking to find connections between bees and flower colors in North America. There researchers have found a close connection between flower color and the kinds of colors bees are able to see, and what attracts them.Then because Australia has been isolated from the rest of the world for millions of years, the team theorized that if the same color patterns emerged independently in such a place, it would prove that the flowers in both places adapted to the bees, and not the other way around. Helping out was prior research that showed that not long after Australia broke away from the other continents some 34 million years ago, the flowers blooming on the island were bland and nearly colorless; which gives researchers a unique opportunity for learning about how coloring in flowers comes about, as today, Australia is teaming with a huge variety of brightly colored flowers.To find out, the team collected flower samples from 111 native species then studied them using a spectrophotometer (a device that measures different properties of light over a given spectrum). In so doing they found that the studied flowers displayed colors that matched almost exactly with the blue and green ultraviolet vision receptors in bees. And because the results matched those found in North America, the team concluded that the flowers in both places co-evolved in the same way, thus proving that the flowers were reacting and adapting to what the bees were looking for, rather than the bees changing to help them better find the particular flowers that best suited them.This new research also shows that because flowers have been adapting to suit the taste of bees, rather than for birds or butterflies, bees are the primary means by which flowers are pollinated, which means that as bee populations decline, so too will flowers, and perhaps their rich coloring.last_img read more

Energy harvester collects energy from sunlight and raindrops

first_imgHybrid device harvests energy from sunlight and raindrops: A transparent PDMS nanogenerator integrated with a silicon solar cell by sharing a mutual electrode made of PEDOT:PSS film. Credit: Liu et al. ©2018 American Chemical Society 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. © 2018 Phys.org Explore further Journal information: ACS Nano The researchers, Yuqiang Liu et al., at Soochow University in China, have published a paper on the hybrid device in a recent issue of ACS Nano.The hybrid device consists of a conventional silicon solar cell and a triboelectric nanogenerator (TENG), which converts the mechanical energy of falling raindrops into electricity. Although previous research has shown that these two types of devices can be connected with an extra wire, in the new design the solar cell and TENG are integrated by sharing a mutual electrode. “The biggest breakthrough in this work is that an integrated generator composed of a solar cell and a TENG was demonstrated through sharing a mutual electrode,” coauthor Zhen Wen at Soochow University told Phys.org. “Compared to previous work, the simple design of the mutual electrode reduces the number of functional layers, which greatly improves the output efficiency.”The shared electrode not only results in a more compact design, but it also offers advantages to both the solar cell and TENG. In particular, the TENG protects the solar cell by acting as a waterproof barrier and prevents water from penetrating the silicon. The textured electrode surface also greatly suppresses unwanted reflection of light, enhancing light harvesting. Further, the textured surface results in a greater contact area between the TENG and falling rain drops, which improves the overall performance of the nanogenerator. One challenge that remains to be addressed is the minor drawback that the solar cell and TENG cannot function simultaneously.”Due to the design of the mutual electrode, the solar cell and nanogenerator cannot work together,” Wen said. “So if there is a sunshower (sunshine and raindrops appearing at the same time), we have to give up one function of the hybrid generator. But I don’t think that is often the case.”In the future, the researchers plan to explore integrating the hybrid device into electronic clothing.”Due to the unique design, it has advantages of being lightweight and having a high efficiency,” Wen said. “We are now designing a fiber-shaped device and expect to weave them together as a fabric. My wish is to fabricate clothing that can generate electricity from sunshine and raindrops, and then use this electricity to power wearable electronic devices.”center_img With a TENG, solar cells could work come rain or shine More information: Yuqiang Liu et al. “Integrating a Silicon Solar Cell with a Triboelectric Nanogenerator via a Mutual Electrode for Harvesting Energy from Sunlight and Raindrops.” ACS Nano. DOI: 10.1021/acsnano.8b00416 By attaching a transparent nanogenerator to a silicon solar cell, researchers have designed a device that harvests solar energy in sunny conditions and the mechanical energy of falling raindrops in rainy conditions. The dual functionality may provide a way to harvest energy with greater consistency in the midst of constantly changing weather conditions. Citation: Energy harvester collects energy from sunlight and raindrops (2018, March 8) retrieved 18 August 2019 from https://phys.org/news/2018-03-energy-harvester-sunlight-raindrops.htmllast_img read more

Congress Mulls Ban On Chinese Trains And Buses

first_img https://ondemand.npr.org/anon.npr-mp3/npr/me/2019/08/20190823_me_security_concer… Congress Mulls Ban On Chinese Trains And Buses. Oh, Come On… by NPR News Brian Naylor 8.26.19 5:01am Congress is poised to restrict purchases of Chinese-built buses and rail cars in legislation that could open a new front in the trade war alongside the Trump administration’s squabbles with Beijing.A bill would forbid the use of federal grants, which the Department of Transportation often makes to big-city transit authorities, to buy new subway trains or buses from the Chinese-owned manufacturer CRRC.Robert Puentes, president of the Eno Center for Transportation, a nonpartisan transportation think tank, says CRRC already dominates the market for rail cars in China — “and they intend to corner the global market here in United States.”Puentes says the company has successfully won bids for transit agencies in Boston, Chicago, Los Angeles and Philadelphia “by adhering to the rules that these agencies and these cities have laid out.”CRRC has built two American plants, one in Massachusetts and one in Illinois, where it assembles the rail cars.The shells are imported from China; other parts are made in the United States.Puentes says there are no American-owned companies that make these kinds of commuter rail cars, although there are U.S. firms that make freight cars.Other transit systems rely on other foreign-based manufacturers. Washington, D.C.’s rail transit authority, for example, is buying cars assembled in the United States by a division of the Japanese manufacturer Kawasaki.Rep. Harley Rouda, D-Calif., is chief sponsor of legislation that would ban the transit systems from using federal money to buy the Chinese rail cars. He tells NPR the U.S. should not be supporting a company subsidized by the Chinese government.”We think it’s important that American taxpayers’ hard-earned dollars and the money that they have provided to the federal government not go to support Chinese companies bent on undermining industries that are important to our national security.”Rouda says the legislation would not affect existing contracts between U.S. transit agencies and CRCC. And he says that aside from the economic implications, there are important national security concerns.”Just think for a minute that if you ever ended up in hostilities with a country that controlled those railways and those bus systems, what the economic impact in the national security threat it would cause to a country such as the United States.”Chinese builder: Nothing sinister hereNot so, says Lydia Rivera, a spokeswoman for CRRC’s Massachusetts-based division.”Those are exaggerated statements,” she says.Worries that China might use the rail cars it builds to spy on Americans or hack their data “are unfounded concerns, unfortunately, by lobbyists. None of the so-called ‘at-risk’ systems on our rail cars pose a threat.”Backers of the ban include U.S. freight car manufacturers, who worry the Chinese will target their business next. Rivera says that’s not going to happen.”We have no interest in the freight industry. It is not lucrative for us, and we will not be going to the freight industry.”Rivera says a ban on the use of federal funds could mean the loss of 185 jobs at the Massachusetts factory.Puentes, of the Eno Center, believes the national security concerns over the Chinese-built rail cars are a bit overstated.”There is a long and steady supply chain,” he says. “There’s a long, long and lengthy review process. There is oversight by the transit agencies. So some of that, I think, is being overblown when it comes to national security. But the economic security concerns are something we do have to deal with.”Puentes called the proposed ban part of the larger set of policy concerns between the U.S. and China, which include the trade war, along with cybersecurity and economic security issues.”We have to understand that it really is highly nuanced and it’s not as simple, I think, as some are making it out to be.”The provision banning use of federal funds on Chinese rail cars is part of the House defense authorization bill.A similar provision, also including a ban on spending on Chinese bus manufacturers, is part of the Senate-passed measure. Rouda says he thinks the differences between the two chambers’ legislation should be resolved quickly.Copyright 2019 NPR. To see more, visit NPR.center_img Mark Lennihanlast_img read more

CU to recruit permanent hostel supers to curb incidents of ragging

first_imgKolkata: The Calcutta University (CU) has decided to recruit permanent hostel superintendents at all its hostels, to curb incidents of ragging. The decision was taken at the syndicate meeting, the highest decision-making body of the varsity on Monday. The varsity has also decided to demarcate one of its 16 hostels only for first year male students, as they have been found to be the most vulnerable to ragging as per records of the varsity.It may be mentioned that in the last few months, there have been a number of complaints of ragging from the hostels under CU and some of the students have complained directly to University Grants Commission (UGC) through e-mail. Also Read – Heavy rain hits traffic, flightsThis had resulted in a section of educationists raising questions over the role of the varsity in investigation of ragging incidents. “We are taking strong measures to curb incidents of ragging in our hostels. A number of hostels did not have full-time permanent hostel superintendents. Now, we will recruit them on a permanent basis,” CU vice-chancellor Sonali Chakravarti Banerjee said.A senior official of the varsity, who attended the syndicate meeting, informed that the persons who will be recruited as hostel superintendents, will stay round-the-clock in the hostels and keep a hawk eye on the activities. The minimum qualification for the new recruits will have to be graduate and their age group should be between 45-55. “We have often seen that young persons who are in charge of hostels are unable to control students and the latter have a tendency to ignore his/her instructions. So, we have taken a decision to have an age group for the superintendents,” the official added.”The majority of the complaints that we receive come from first year students. We have decided to segregate a New Law Hostel only for first year male students. The idea is to see whether there are any complaints from this hostel. If the plan works out, then we will earmark another hostel for first year women students,” Banerjee said.last_img read more

Mythological dance recital

first_imgRam Navami is celebrated in North India with great fervour and to mark the occasion, Bharatiya Sangeet Sadan and Sangeet Natak Akademi is going to organise a dance and music programme titled-’Shri Ram-Panchwati Varnan – Ram Van Gaman’ on Friday in the national Capital.Dr Mahesh Sharma, minister of State for Tourism & culture will be inaugurating the event where dance maestro and Padamshri Uma Sharma will perform Nritya-Bhinaya (Kathak) on this auspicious occasion. The cultural programme will provide a delightful experience to all dance and music lovers.  Also Read – ‘Playing Jojo was emotionally exhausting’This event is based on the Tulsidas Chaupai and it will be presented by Uma Sharma with her disciples. Vocal support and music direction will be provided by Pt. Jwala Prasad. The performance will show the flawless presentation from the ancient text, chapter Ram Van Gaman and will unfold the deep emotion and love of Sita towards her better half. It will also show how for an Indian woman, the company of her husband is more important rather than the comfort of a palace. Panchvati Varnan is also narration of Surpanakha’s jealousy towards Sita’s beauty and how her rage to take revenge led to abduction of Sita. Also Read – Leslie doing new comedy special with NetflixUma Sharma has worked majorly in preserving the ancient Indian art dance form with her passion and extensive research on our age-old dance form and brought out the transition of former style of Kathak to modern. She has travelled around the world narrating the timeless stories of Indian mythology and attended various workshops. To keep the culture long lived, she is mentoring budding stars who share the same interest and preserve the art.When: April 15Where: Meghdoot Theatre, Sangeet Natak AkademiTiming: 6:30 pmlast_img read more

GSIs appbased landslidewarning begins functioning in 3 Bengal villages

first_imgKolkata: From now on, whatsapp messages and sirens on mobile phone apps will alert inhabitants of three most landslide-prone villages of the country, at the slightest signals of landslides. The Geological Survey of India (GSI) has recently developed a Landslide Early Warning System (L-EWS) for the people of Giddapahar, Paglajhora and 14th Mile villages in Kurseong block of Darjeeling District in association with the district administration of West Bengal government, GSI Director Ashish Nath said. Also Read – Rain batters Kolkata, cripples normal life The L-EWS is connected to mobile apps for fast dissemination of the alert to the poeple. The system installed by the GSI in select villages, mostly in Kurseong block, has already started working, the director said. “After the immense loss of life and property in these three villages since 2003 mainly because of landslides, we decided to install the system here first,” he said. Studying the Kurseong area utilising the modern InSAR technology by placing five corner reflectors and rainfall threshold analysis for landslide initiation resulted in the development of the people-centric L-EWS, he said. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killed Earlier, in case of landslides triggered by rainfall, the GSI used to alert the administration and then it used to be passed on to the local population. “But we felt there must be a change and we should alert the possible victims as soon as there is a trigger. We believe, this will help us in saving more lives,” he said. Eighteen such zones have been marked as extremely vulnerable to landslides and the three Darjeeling villages, where the warning system has been installed were on top of the chart, he stated. Elaborating about the system, he said that it is ideal for warning landslides as spatio-temporal forecasting is extremely difficult, particularly from a remote area. The prediction of the occurrences of landslides both in space and time does not happen because most of the key elements like risk knowledge, monitoring, analysis, warning generation, dissemination and communication of warning and preparedness for timely response do not work in sync, Nath said. “The difficulties are coupled with the variability in the intensity of trigger thus making forecasting quite difficult for the purpose of alerting the community at risk. So the need of putting community-based landslide warning system was felt,” he said. Incidentally, in 2016, the Landslide Studies Division of Geohazards Research and Management (GHRM) Centre, GSI, Kolkata had studied this landslide zone in order to develop an early warning system. In fact, before the deployment of the system, a few rounds of community landslide awareness programme, including mock-drills, were also conducted, Nath said. A billboard showing details of landslide warning has been also erected in two places one at Giddapahar and another at Paglajhora to spread awareness among the people.last_img read more

Indias Youngest Pianist

first_imgBorn in 2006, Gauri Mishra is India’s youngest pianist. Her journey for the byways of the piano repertoire started since she was 4 years old. With her sheer dedication and hard-work, she created the National record at the age of 9, of being the youngest piano player in the country. She has also been remarked as the youngest pianist of world by two reputed organisations – ‘Assist world records’ and ‘World records India’. Her parents discusses her future plans with Millennium Post in an interview. Also Read – Add new books to your shelfWith already being recognised by more than 10 world record organisations and being the youngest pianist of India, does she plan to break any more records in the future? Whatever she is today, it’s because of her mentor Dr Aman Bathla (Fastest Pianist of the World) and all her well-wishers’ blessings and support. Currently she wants to concentrate on her passion and hone her musical skills.Does she aspire to learn any more musical instruments other than piano? Also Read – Over 2 hours screen time daily will make your kids impulsive She is very much enjoy playing Piano and would love to do more on it, and learning life through Piano. However she also likes to play Guitar and violin. How is she able to excel at her studies, sports as well as being “The Youngest Pianist of India” at such a tender age? Gauri’s musical journey is very charming and splendid so far, but not easy along with studies. All these achievements could not have been possible without faith on her Guru. Her school lays a lot of focus on extra curricular activities which give her a chance to experience life beyond academics. We understand the importance of time or work management, and we have tried to make her adopt this in life for better management of her passion and studies. How much time does she dedicate every day to practising piano? She usually practices daily for 1 to 2 hours, depending on her mood and study work load. Again it boils down to managing between studies and passion, which she is able to do very well till now.  Is there anything else that she loves to do?  She is fond of learning new things in the field of Science, reading books, acting and sports. Several times she had participated in skating competitions and theatre workshops (Kingdom of Dream Gurgaon, Epic Center Theater and Mumbai) and won many medals and trophies at school level competitions. But her love for piano is something else. It is not only her passion, but a medium to calm her mind. Whenever she plays piano at home, at public or at a concert she seems to be in a different world. So she wants to learn music because it is the most powerful medium to connect with each other.last_img read more

Two killed in separate road accidents in city

first_imgKOLKATA: Two persons were killed in two separate road accidents on Wednesday night and Thursday morning acrossthe city. On Wednesday night, an auto-rickshaw toppled near Acropolis Mall and the driver died on the spot due to head injuries. According to locals, an auto was headed towards the Ruby crossing from Bijan Setu. Near Acropolis Mall, the driver of the auto identified as Santosh Gupta (30) lost control over the vehicle and it toppled. Gupta fell outside from the vehicle and sustained major head injuries as his head banged against the road. He was immediately rushed to a private hospital where the doctors declared Gupta brought dead. It is suspected that Gupta was in an inebriated state while driving. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedIn another incident, a pedestrian came in between two buses of the same route when they were competing with each other. One of the buses knocked him down while overtaking his rival on Thursday morning around 9 am. Locals alleged that the two buses of route number 30D were racing with each other to get more passengers onboard. One of the two reached the Belgachia Metro stoppage first and started picking up passengers. In the meantime, when the driver noticed his rival was about to overtake, he moved the bus to its right to block it. But the other bus driver was so determined to overtake, he drove one wheel on the median divider to get his way. In this situation, a pedestrian came in between the buses and was ran over by the overtaking bus. Also Read – Bose & Gandhi: More similar than apart, says Sugata BoseWhile the first bus driver fled the scene with his vehicle, the driver and the conductor of the second bus fled leaving the bus on the middle of the road. Police immediately rushed the injured, identified as Badal Das, to RG Kar Medical College and Hospital where the doctors declared him brought dead. Later, a case against the driver of the offending bus was registered at the Ultadanga police station under the sections 279 IPC (rash driving or riding on a public way) and 304A (Causing death by negligence). The offending bus has been seized and a search is on to nab the driver.last_img read more

Mayor looks to overhaul solid waste management in city

first_imgKolkata: Mayor Firhad Hakim on Friday proposed to allocate Rs 657.16 crore for completely revamping solid waste management in the city. Hakim announced the allocation while delivering the KMC Budget statement and at the same time, touched upon a slew of measures aimed at the overhaul.”There was a time when people would say that Kolkata is a dead city. But now, with KMC undertaking commendable work to maintain a clean and hygienic environment, people say that Kolkata is a living city. Scientific solid waste management is a challenge and we are up to it,” Hakim said. Also Read – Bose & Gandhi: More similar than apart, says Sugata BoseHe maintained that the civic body has already started segregation of waste at the source at 7 wards in the city and is all set to start the same in 20 more wards. “We will gradually bring more and more wards under the purview as separation of dry and wet waste is of utmost importance. Dry waste can be recycled while the wet portion can be used for making fertiliser. Uttarpara Municipality in Hooghly district is now successfully doing segregation of waste at source,” the Mayor said. Also Read – Rs 13,000 crore investment to provide 2 lakh jobs: MamataKMC is also introducing a dress code for the employees who are associated with the collection of garbage at the ground level. “Gone are the days when a cleaner would work in a tattered dress and slippers, making them susceptible to diseases. The garbage disposal system has been modernised and so the cleaners should also have a proper dress code,” Hakim added. KMC has placed 11,500 bins of 240 litre capacity each, for the use of pedestrians and shop owners to stop littering streets and footpaths. The civic body has progressed towards replacing open vats in the city by introducing compactor and movable compactor stations. 120 battery operated environment and user-friendly hydraulic dumpers have been engaged. “I have made it clear to our officials that cleaning of garbage at any place in the city, irrespective of jurisdiction, will be taken up by the Conservancy department. The charge for cleaning may be collected from the concerned agency at a later stage,” Hakim said.last_img read more