Exploding star in NGC 2397 Citation: Backyard astronomer in Ireland finds supernova (2010, October 8) retrieved 18 August 2019 from https://phys.org/news/2010-10-backyard-astronomer-ireland-supernova.html © 2010 PhysOrg.com Image: David Grennan/Astronomy forum. Astronomer David Grennan and his wife Carol were about to turn in from their garden shed observatory in Raheny in Dublin on 17th September when they discovered a supernova. The explosion that caused the burst of light occurred an estimated 290 million years ago. The discovery was confirmed officially by International astronomers earlier this week.Supernovae are stellar explosions that can outshine entire galaxies for a short time, and they are the major source of heavy elements in the Universe.Mr Grennan is a software developer by day, but at night he spends as much time as the Irish weather permits in his home-made observatory, which is a converted garden shed with a retractable roof. Grennan said he had been stargazing since he was about five years old, and had always been fascinated by the stars. He bought his first telescope in 1991, and has continually upgraded his equipment. In 2005 he built his home observatory using standard DIY parts. The observatory is equipped with a 14 inch Cassegrain telescope.David’s wife Carol analyzes the images he takes with his telescope and helps identify interesting objects. They discovered the supernova by comparing images of the galaxy UGC 112 taken in August and September. The signs were tiny, but David’s many years of experience helped him to spot them.David said the discovery was the result of a year’s work, during which he surveyed 2,611 galaxies. He said it was “mind-boggling” to be the first to see something that happened almost 300 million years ago, and the time-lag “is on a scale almost as difficult to comprehend as Ireland’s astronomical debt.” Carol was even more excited than he was, and the two shared a bottle of champagne when the supernova was confirmed. The supernova, named 2010 IK by official astronomy bodies, is the first to be discovered by someone in Ireland, but it is not Grennan’s first discovery. In 2008 he discovered a three-meter-wide asteroid (his second), which he named after his mother, Catherine Griffin, in honor of her encouragement of his stargazing hobby.Grennan, who was once chairman of Astronomy Ireland, said he would love to see young children becoming interested in astrophysics because “it’s amazing what you discover.”Supernovae are spotted regularly, but Professor Stephen Smartt of Queen’s University Belfast said it was unusual for astronomers in northern Europe to find one. He confirmed the finding was the first supernova to be discovered from Ireland.The supernova is expected to be visible with a powerful telescope for the next two or three months, after which it will fade from view. 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. (PhysOrg.com) — An amateur astronomer working from his backyard shed in Ireland was the first in the world to spot a supernova explosion last month. The discovery is the biggest ever in amateur astronomy in Ireland. Explore further
via Diginfo Sagawa foresees such a system as having use in research about using the body to control things like multimedia, virtual reality, and games. He also said that data obtained by this measurement method could be used to analyze how athletes move.” He can imagine the system being used to measure the movements of an athlete in the middle of a stadium, from a long way away, for example. If we can do that, we think this method would be great for making 3-D videos as well.”Actually, the possibilities may go beyond what they have already considered. “Currently, we’ve stopped at the stage of making measurements. But we’re also thinking about how to use the measured data. We’d like to work on applications to sports science and materials analysis.” Another possibility, as long as the patterns can be captured, is to apply the system to work with different devices, too. “We’d also like to keep increasing the range of things that can be measured.” Citation: AIST group measures objects in 3-D with camera, projector (w/ Video) (2012, August 16) retrieved 18 August 2019 from https://phys.org/news/2012-08-aist-group-d-camera-projector.html The team says the value of their method is that it can provide more measurement positions than conventional motion capture, and can be used in scenarios where shapes have been difficult to measure because they change too fast. They also say that their method is precise, with a tolerance of just 1-2 mm. Ryusuku Sagawa, service Robotics Research Group, Intelligent Systems Research Institute at AIST, presided over the camera and projector demo. “If you look carefully, you can see that each line is wavy. The wavy line patterns are carefully designed, so the pattern from the projector can be recognized from the camera image. This makes it possible to use the projector and the camera for triangulation, so we can know the shape at that instant.” 1ms pan-tilt camera system tracks the flying balls (w/ Video) Explore further (Phys.org) — Got camera? Got projector? Then you can measure objects in 3-D. A group at the Advanced Industrial Science and Technology Institute (AIST) has had no problem doing that. The researchers have demonstrated their method for measuring objects in 3-D, using only a camera and projector. Patterned light is projected on to the object and pattern images captured by the camera are processed to measure its 3-D shape. More information: © 2012 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.
Credit: Small (2016). DOI: 10.1002/smll.201601846 Explore further Journal information: Small (Phys.org)—A combined team of researchers from the Harbin Institute of Technology in China and the University of California in the U.S. has developed a nano-sized, remotely controlled fish that is able to swim in liquids when a magnetic field is applied. The team has published the details of their research in the journal Nano Small Micro. Play Credit: Small (2016). DOI: 10.1002/smll.201601846 There are still some big issues to address with the tiny fish, the team acknowledges—one of which is how to rid the body of the swimmers after they have delivered their package. One solution they suggest is using material that at some point is biodegradable. There is also the cost—the amount of precious metals used to create a single fish would be small, but it could add up quickly if hundreds of the fish were used to deliver doses of medicines. Also, it would seem that a means for tracking the fish would have to be developed to allow for micro-steering. 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. PausePlay% buffered00:0000:00UnmuteMuteDisable captionsEnable captionsSettingsCaptionsDisabledQuality0SpeedNormalCaptionsGo back to previous menuQualityGo back to previous menuSpeedGo back to previous menu0.5×0.75×Normal1.25×1.5×1.75×2×Exit fullscreenEnter fullscreen Play Credit: Small (2016). DOI: 10.1002/smll.201601846 Video: Research is revealing more about what it takes to truly swim like a fish More information: Tianlong Li et al. Magnetically Propelled Fish-Like Nanoswimmers, Small (2016). DOI: 10.1002/smll.201601846AbstractThe swimming locomotion of fish involves a complex interplay between a deformable body and induced flow in the surrounding fluid. While innovative robotic devices, inspired by physicomechanical designs evolved in fish, have been created for underwater propulsion of large swimmers, scaling such powerful locomotion into micro-/nanoscale propulsion remains challenging. Here, a magnetically propelled fish-like artificial nanoswimmer is demonstrated that emulates the body and caudal fin propulsion swimming mechanism displayed by fish. To mimic the deformable fish body for periodic shape changes, template-electrosynthesized multisegment nanowire swimmers are used to construct the artificial nanofishes (diameter 200 nm; length 4.8 μm). The resulting nanofish consists a gold segment as the head, two nickel segments as the body, and one gold segment as the caudal fin, with three flexible porous silver hinges linking each segment. Under an oscillating magnetic field, the propulsive nickel elements bend the body and caudal fin periodically to generate travelling-wave motions with speeds exceeding 30 μm s−1. The propulsion dynamics is studied theoretically using the immersed boundary method. Such body-deformable nanofishes exhibit a high swimming efficiency and can serve as promising biomimetic nanorobotic devices for nanoscale biomedical applications. PausePlay% buffered00:0000:00UnmuteMuteDisable captionsEnable captionsSettingsCaptionsDisabledQuality0SpeedNormalCaptionsGo back to previous menuQualityGo back to previous menuSpeedGo back to previous menu0.5×0.75×Normal1.25×1.5×1.75×2×Exit fullscreenEnter fullscreen Prior efforts to build extremely small bio-transport mechanisms have generally been based on the corkscrew-tailed model of bacteria, the researchers note, but they believed a better approach would be to mimic the way fish swim. To that end, they connected gold and nickel segments together with silver hinges—the outer segments made of gold serve as the head and tail, while the inner segments serve as the fish body. Each of the segments are just 800 nanometers in length and the complete fish is a hundred times smaller than a single grain of sand.The fish is caused to swim by applying an oscillating magnetic field that forces the head and tail to swing, which in turn propels the fish forward. The direction the fish takes and the speed at which it moves can be controlled by manipulating the position and speed of the oscillating magnet. The purpose of such nanoswimmers, the team proposes, is to carry medicine to a particular part of the body, thereby reducing the need for surgery or overuse of drugs that can cause negative side effects in other parts of the body. An accompanying video demonstrates not only the ease with which the fish can be controlled, but the speed at which they can travel—an obvious improvement over other nano-delivery systems. Citation: Tiny robot ‘nano-fish’ may one day deliver drugs inside the body (2016, September 12) retrieved 18 August 2019 from https://phys.org/news/2016-09-tiny-robot-fish-day-drugs.html © 2016 Phys.org
According to sources, Delhi Chief Minister Arvind Kejriwal has directed Directorate of Vigilance, the administrative department of ACB, to take further action on a complaint of embezzlement of Rs 20 lakh against Meena lodged by a retired inspector of Delhi police on Thursday.In the
Kolkata: The City Civil Court on Tuesday directed the Union Minister of State for Ministry of Heavy Industries and Public Enterprises, Babul Supriyo, to retract the defamatory statements that he made against TMC MP Abhishek Banerjee.It may be recalled that in November 2017, Supriyo had made the “malicious and defamatory” statements against Banerjee at a Press conference stating that the latter “illegitimately profiteered to the tune of Rs 17 to Rs 18 crore against smuggling of coal in Bengal.” It got published and circulated widely in different media and even on social networking sites. Also Read – Rain batters Kolkata, cripples normal lifeIt led to defamation of Banerjee and his counsels moved court in December 2017.The Third Bench of the City Civil Court had granted an interim order of injunction in this connection restraining Supriyo “not to make any derogatory comment or defamatory statement against Banerjee”. The Court on July 24 ordered Supriyo “to retract the defamatory statements made in November 2017 at the Press conference in Asansol against Abhishek Banerjee by sending a letter or otherwise within a fortnight from the date of the order.” Sanjay Basu, Advocate for Banerjee, said: “Babul Supriyo failed to produce any evidence in support of his defamatory statement and hence the Court passed the order of injunction and retraction in favour of Abhishek Banerjee. The falsity in Babul Supriyo’s statement has been exposed.”
Kolkata: The Mamata Banerjee government has decided to waive the toll tax for two-wheelers on Vidyasagar Setu.With the announcement of Chief Minister Mamata Banerjee in this regard, two-wheeler riders will not have to pay Rs 5 anymore to avail Vidyasagar Setu to travel across River Hooghly from October 1.While leaving Nabanna on Thursday, Banerjee said: “The toll tax for two-wheelers on Vidyasagar Setu has been waived. From October 1 onwards, riders of two-wheelers will not have to pay the same.” Also Read – Rain batters Kolkata, cripples normal lifeAround 3.11 crore vehicles pass through the bridge every year and it includes around 84 lakh to 90 lakh two-wheelers. The decision to waive the toll tax for the two-wheelers will cost Rs 5 crore to the state’s exchequer.It may be mentioned that there are separate lanes for two-wheelers at the toll plaza on Vidyasagar Setu. But during rush hours, there are long queues to pay thetoll tax. With this waiver, there will be no more queues of two-wheelers and it will help in bringing down the rate of pollution in the area. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedSecondly, many office-goers need to cross the bridge everyday and they will be tremendously benefitted due to this decision of the state government as they no will no longer have to pay Rs 5 each time — once while heading towards their office and again while returning home. It may be mentioned that the state Secretariat, Nabanna, is situated at a stone’s throw distance from the toll plaza. The decision has been welcomed by the people in general as they do not have to pay any amount to cross the bridge and also wait in queues during the office hours.It may be mentioned that only thetoll tax for two-wheelers has been waived while the same for other vehicles remain unchanged.
Alcohol use is especially detrimental to patients with Hepatitis C.The findings showed that people infected with Hepatitis C are three times more likely to drink five or more drinks per day everyday than those without Hepatitis C, lifetime abstainers or current non-excessive drinkers.“Alcohol promotes faster development of fibrosis and progression to cirrhosis in people living with Hepatitis C, making drinking a dangerous and often deadly activity,” said lead author Amber L. Taylor from the Centres for Disease Control and Prevention’s Division of Viral Hepatitis. Also Read – ‘Playing Jojo was emotionally exhausting’“In 2010, alcohol-related liver disease ranked third as a cause of death among people with Hepatitis C,” Tylor added in the paper published in the American Journal of Preventive Medicine.In order to better understand the link between alcohol use and Hepatitis C, investigators examined self-reported alcohol use.The team looked at Hepatitis C infection rates for four groups: lifetime abstainers, former drinkers, non-excessive current drinkers and excessive current drinkers. Also Read – Leslie doing new comedy special with NetflixPeople who participated and tested positive for Hepatitis C antibodies found that 50 per cent were unaware before being notified.“Half of all people living with Hepatitis C are not aware of their infection nor the serious medical risks they face when consuming alcohol,” Taylor stated. The new information provided by this study helps shed more light on the level of alcohol consumption among those living with Hepatitis C. It can help guide best practices for both treating patients and possible interventions.