(PhysOrg.com) — NASA engineers have designed an extremely quiet one-person electrically powered aircraft that can hover like a helicopter and fly like a plane. The “Puffin” launches from an upright position with the tail split into four legs that serve as stable landing/take-off gear. Explore further The 3.7-meter-long craft has two wings with a combined wingspan of 4.1 meters. Each wing is has a 2.3 meter wide propeller. Flaps on the wings direct the air from the rotors upward while the aircraft is on the ground, and then direct it downwards allowing the Puffin to rise, and then hover as it leans over to begin its flight with the craft (and pilot) horizontal.The aircraft was designed by NASA’s Langley Research Center in Hampton, Virginia, in collaboration with the National Institute of Aerospace, the Massachusetts Institute of Technology, the Georgia Institute of Technology, and M-DOT Aerospace. It is designed to be manufactured from carbon fiber composites and would weigh only around 135 kg, plus 45 kg of rechargeable lithium phosphate batteries.The Puffin’s electric motors produce virtually no emissions, and can lift its payload of one person with only 60 horsepower. The motors are up to 95% efficient, while internal combustion engines the same size would only rate at around 20% efficient, and electric motors are up to 20 times more reliable than piston engines because they have fewer moving parts. Citation: Puffin: the one-person electric aircraft (w/ Video) (2010, January 22) retrieved 18 August 2019 from https://phys.org/news/2010-01-puffin-one-person-electric-aircraft-video.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. The electric motors are also super-quiet, producing only 50 decibels at 150 meters, which makes the Puffin about 10 times less noisy than even low-noise helicopters. This may mean that if the Puffin is used for personal travel or courier services, an airport may not be needed at all, and the Puffin could land and take off from a private residence without annoying neighbors. The motors are not only quiet, they generate less heat than internal combustion engines, and the combination could make the craft ideal for military applications such as covert spying operations. The cruising speed of the Puffin is expected to be 240 kph, with spurts of 480 kph possible. The engine does not require air, which means its flight capabilities are not limited by thin air, and it could fly as high as 9,150 meters. With a full charge, the batteries could keep the plane aloft for only 80 kilometers at cruising speed, but as new batteries are developed this is likely to increase substantially, perhaps to over 300 kilometers by 2017. Flight Tests Confirm New Technologies Can Help Quiet The Skies Safety features in the Puffin include a motor design that allows parts of either motor to fail with no reduction in power to the propellers. It is also designed to be able to take a hard, forceful landing with most of the load taken by the landing gear, instead of the pilot as it is in other single person aircraft designs.The device was dubbed the Puffin because the bird of that name resembles the craft in looking awkward, and in seeming to have wings too small to fly. It’s also a solitary bird, and its habit of hiding its droppings makes it environmentally friendly, like the craft.The design of the Puffin was unveiled on January 20 by NASA aerospace engineer Mark Moore, at a meeting of the American Helicopter Society in San Francisco. A one-third scale demonstration model is expected to be finished by March this year, after which time they will concentrate on the transition between cruise flight and hovering.Moore said they are already planning future generations of the Puffin, in which there would be enough redundancy that if one propeller was completely out of action the aircraft could still fly safely, and there would be no single point of failure. © 2010 PhysOrg.com
In news of a completely different nature, researchers discovered a hack that allows access to personal data on Windows, Android and iOS devices—in testing they found they could access the devices between 82 and 92 percent of the time, which meant they were able to hack the accounts of services used on those devices, and frustratingly, there doesn’t appear to be a way to block it. In other scary news, a team of researchers in Denmark has found a link between the common antibiotic clarithromycin and heart deaths—it’s used to treat a wide variety of bacterial infections.More optimistically, a group working at Michigan State University has found a way to create a new type of solar collector that doesn’t block the view—because it’s clear. And if you’ve been wondering why global warming is taking a break, a team in Switzerland thinks it’s because of El Niño/La Niña and solar fluctuations. And finally, if you were hoping to be part of the generation of people that live forever, you may be out of luck as a team of researchers has concluded that living forever may never be possible—sadly, they think they’ve found evidence that we humans have reached a plateau. Explore further Citation: Best of Last Week – Evidence of quark-gluon interactions, new portable device hack and why we may never live forever (2014, August 25) retrieved 18 August 2019 from https://phys.org/news/2014-08-week-evidence-quark-gluon-interactions-portable.html Researchers find first direct evidence of ‘spin symmetry’ in atoms (Phys.org) —With summer drawing to a close, research is starting to heat up. Last week, physicists at the Relativistic Heavy Ion Collider used supercomputer calculations to offer evidence that particles predicted by the theory of quark-gluon interactions are being produced in heavy-ion collisions—it’s the first such evidence found and it should offer scientists a way to mimic condition that existed 14 billion years ago. Also, researchers at the Joint Institute for Laboratory Astrophysics in Denver Colorado have found the first direct evidence of “spin symmetry” in atoms. The team used an ultra-stable laser and their findings could lead to a better understanding of superconductivity and colossal magneto-resistance. Meanwhile, another team at Lawrence Berkeley National Laboratory demonstrated ultra low-field nuclear magnetic resonance using Earth’s magnetic field—it was a proof of concept experiment looking into ways to sense the interior chemical and physical attributes of an object from a distance, without sampling or encapsulating it. And in another first, physicists at Yale University have succeeded in chilling the world’s coolest molecules—they cooled samples of strontium monofluoride, to 2.5 thousandths of a degree above absolute zero using a laser isolating and cooling process—it’s the lowest temperature ever achieved by scientists for a molecule. © 2014 Phys.org This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. This is an illustration of symmetry in the magnetic properties — or nuclear ‘spins’ — of strontium atoms. JILA researchers observed that if two atoms have the same nuclear spin state (top), they interact weakly, and the interaction strength does not depend on which of the 10 possible nuclear spin states are involved. If the atoms have different nuclear spin states (bottom), they interact much more strongly, and, again, always with the same strength. Credit: Ye and Rey groups and Steve Burrows/JILA
Journal information: Proceedings of the National Academy of Sciences 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. Credit: CC0 Public Domain Are Rossby waves to blame for Earth’s magnetic field drifting westward? Scientists have long been curious about the development of the Earth’s magnetic field—it is believed to be part of the process that made life possible on the planet because it shields the atmosphere from the solar wind. But it is not known when it first appeared. Scientists believe that the field exists due to the spin of the Earth’s metal core, but that theory was tested when researchers found something intriguing when studying zircon crystals from Jack Hills in Western Australia. The crystals were found to be between 3.3 and 4.2 billion years old, suggesting they could offer evidence of conditions when the planet was still forming. They noted that the crystals were magnetic, suggesting that they had been magnetized by a planetary magnetic field. But prior research has suggested the Earth’s core did not harden until much later—thus, the magnetic field would have been created by a liquid core. In this new effort, the researchers claim to have found evidence that suggests the crystals could have become magnetized much later than their creation date, casting doubt on their use as evidence of a liquid core-generated magnetic field.The researchers found nano-sized holes in the crystals that appeared to have resulted from radiation damage. That allowed magnetite to accumulate within the tiny holes long after the crystals had developed. The researchers note that magnetite is very easily magnetized (hence its name) and will retain magnetism for very long periods of time, as long as it is not exposed to temperatures above 550°C. This finding suggests that the magnetism in the crystals could have developed long after the crystals formed—and it prevents them from being used as evidence for the existence of a planetary magnetic field during its creation stages. More information: Fengzai Tang et al. Secondary magnetite in ancient zircon precludes analysis of a Hadean geodynamo, Proceedings of the National Academy of Sciences (2019). DOI: 10.1073/pnas.1811074116 © 2019 Science X Network Citation: Study of zircon crystals casts doubt on evidence for early development of magnetic field (2019, January 3) retrieved 18 August 2019 from https://phys.org/news/2019-01-zircon-crystals-evidence-early-magnetic.html A combined team of researchers from the University of Cambridge and the University of California has found evidence that casts doubt on the use of zircon crystals as evidence of early development of the Earth’s magnetic field. In their paper published in Proceedings of the National Academy of Sciences, the group describes testing they conducted on the crystals and what they found.
To achive this objective a three days Art Education Seminar and Workshop was organised by Lalit Kala Akademi from 21 to 24 January.The attempt of Lalit Kala Akademi in conducting this seminar was to act as a catalyst and in bringing art veterans and budding artistes under one roof, to be able to gain out of the distinguished speakers that have dedicated their life time to art and culture. During the three days the audience consisted of students, professors and masters from diverse disciplines. Also Read – ‘Playing Jojo was emotionally exhausting’Renowned people from various fields like Ravinder Singh, secretary, ministry of culture, Subhadra Mitra Channa, professor, department of anthropology, DU, senior curator and art critic Gayatri Sinha, were part of the first day of the seminar to speak on the Importance of Art Education.Commenting on the art eduction Sadanand Menon, eminent art critic said that, ‘The necessity for the revitalisation of art education is not a matter of dispute. Education is the ability to ask questions and not be passive receivers of knowledge. Arts political, economic and social dimension should be recognised and promoted.’ The last day of the event, witnessed a splendid display of exhibition by various artists from different states. Artist from different disciplines were invited like Nathu Lal Verma for Fresco, Jayesh Kumar L Mandanka and Sompura for Stone Carving, Dadhi Pathak for Bamboo Art, Panditram for Bhittit Chitra and Jali work, Partha Dasgupta who made beautiful jewellery from Terracotta tiles. Also at display were Thangka Paintings, Pata Paintings, Kangra Paintings, Dogra Casting and more. The Artist that came depicts the diversity of the Indian culture through their performances, art and interdisciplinary workshop. Arts Education fosters both cultural awareness and promotes cultural practices which are transmitted from one generation to the next. Also Read – Leslie doing new comedy special with NetflixVenkat Raman Shyam from Madhaya Pradesh presented Gonda art tradition says that art is a unique form which should be improvised with the modern time and therefore is placed in the category of contemporary art. Further the artist use contemporary mediums like acrylic. The other demonstration includes the stone carvers from the Akshar Dham Temple, handloom weavers form Pata-silk tradition and North East handloom weavers. The Seminar and Workshop reflected the ideology that arts are both the manifestation of culture and the means of communication.
After travelling to Kolkata, Bengaluru and Pune, the festival came to its final pit stop city for 2014 at Buddh International Circuit in Greater Noida on 29 November.The second day of the festival brought along some thunderous performances. From the band, Dinosaur Pile Up (UK) rocking the audience to Alo Wala (Denmark) who delivered an explosive dance floor experience. One of India’s biggest musical bands Indian Ocean played from their latest album Tandanu musicians like Pt. Vishwamohan Bhat, Kumaresh Rajagopalan, and Vishal Dadlani. Also Read – ‘Playing Jojo was emotionally exhausting’Composer Amit Trivedi took on the stage which left the audiences asking for more. The Vaccines took the whole festival to a musically high note.Alongside an amazing music experience, the Bacardi NH7 Weekender this year also makes for an incredible audio visual spectacle! The first day of the festival witnessed Songhoy Blues, all the way from Mali, Africa, charming the audiences with their refreshing brand of blues rock and The Raghu Dixit Project featuring Nritarutya. Also Read – Leslie doing new comedy special with NetflixThe funnymen from AIB had people in splits with their signature brand of edgy humor. A major international act including American heavy metal superstars Fear Factory to the soulful and mellifluous voice of critically acclaimed singer-songwriter Luke Sital-Singh was also marked.At this year’s edition, festival goers get delectable food options to dive into with specially curated food stalls, and even an exclusively created Bacardi NH7 Weekender ice-cream flavour by Hokey Pokey! This year, over 100 artistes played at the Bacardi NH7 Weekender’s four editions – Kolkata, Bengaluru, Pune and Delhi.
Kolkata: In a tragic incident, a 10-year-old boy was killed and two others injured when a fire broke out inside his house at Arambagh in Hooghly.The incident took place in the wee hours of Wednesday.The mother of the 10-year-old boy and his brother received severe burn injuries and they are undergoing necessary treatment in Arambagh Sub-divisional Hospital.Police came to know after preliminary investigation that the fire had spread from a candle that the victim Shantanu Khetrapal’s mother Bela Devi had lit before going to bed last night. Also Read – Heavy rain hits traffic, flightsThere were three people in the house when the fire broke out and they did not even realise when the fire broke out. It was the locals who saw smoke billowing out of a window of the house and initiated the rescue work.Bela Devi panicked and couldn’t find any way out of the house with Shantanu and her younger son as a major portion of the house was engulfed by the fire.Some of the local youth had managed to extinguish the fire to enter the house. They somehow managed to bring all three of them out of the house and took them to the hospital. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedAll three of them were admitted to the hospital and the doctors had initiated necessary treatment. Shantanu succumbed to his burn injuries while his mother and brother are fighting for their lives.Police came to know that the fire spread fast as there were inflammable materials in the house. Locals told the police that a man went out for some work in the wee hours when he noticed that the house was on fire. He started crying for help and then more people from the locality came to the spot and initiated the rescue work.