More information: Pigeons trade efficiency for stability in response to level of challenge during confined flight, C. David Williams, PNAS, DOI: 10.1073/pnas.1407298112 AbstractIndividuals traversing challenging obstacles are faced with a decision: they can adopt traversal strategies that minimally disrupt their normal locomotion patterns or they can adopt strategies that substantially alter their gait, conferring new advantages and disadvantages. We flew pigeons (Columba livia) through an array of vertical obstacles in a flight arena, presenting them with this choice. The pigeons selected either a strategy involving only a slight pause in the normal wing beat cycle, or a wings-folded posture granting reduced efficiency but greater stability should a misjudgment lead to collision. The more stable but less efficient flight strategy was not used to traverse easy obstacles with wide gaps for passage but came to dominate the postures used as obstacle challenge increased with narrower gaps and there was a greater chance of a collision. These results indicate that birds weigh potential obstacle negotiation strategies and estimate task difficulty during locomotor pattern selection. Explore further Feral pigeon (Columba livia) in flight. Credit: Alan D. Wilson/Wikipedia/CC BY-SA 2.5 © 2015 Phys.org City dwellers know that pigeons are some of the best flyers around, unlike robins and other birds, pigeons rarely collide with cars, buildings, trees or any other obstacle. That skill has not gone unnoticed—scientists and engineers have been working for years to duplicate their abilities. In this new effort, Williams and Biewener taught some of their tamed specimens to fly through a corridor to get to a meal, then introduced obstacles and high speed cameras to find out how it is that the birds are so good at avoiding objects in their path.The obstacles were plastic pipes, placed vertically some distance apart from one another. To pass between the pipes, the birds had to scrunch themselves a bit, but how they did so, the researchers found, depended on how far apart the pipes were. They noted that when the pipes were at least a half a wing length apart, the birds lifted their wings as if to flap as they approached the obstacle, but then held them steady, above their heads as they passed between the pipes, then flapped down as soon as they were through—a technique that led to very little loss of altitude, which meant it was quite efficient. But if the pipes were moved closer together, they pulled their wings into their body, a less efficient approach, but one much less likely to result in wing damage. To make sure the first approach was not merely coincident based on where the wings were when the birds arrived at the obstacle, the researchers filmed them multiple times, finding the same result each time.Because the birds used two different techniques for allowing them safe passage through the pipe obstacles, based on what they observed as they approached, the researchers believe that choosing which technique to use was a deliberate act, which meant the birds somehow made a choice of which technique to use, just before they passed through—very impressive, especially when noting that birds, except for some such as crows or magpies, are not generally known for their smarts. Citation: Study shows one reason why pigeons so rarely crash (2015, March 3) retrieved 18 August 2019 from https://phys.org/news/2015-03-pigeons-rarely.html Journal information: Proceedings of the National Academy of Sciences Researchers conduct study to determine impact of using drones to study birds 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)—A pair of researchers with Harvard University has uncovered one of the secrets behind pigeons’ impressive flight abilities. In their paper published in Proceedings of the National Academy of Sciences, David Williams and Andrew Biewener describe how they videotaped some of the birds flying through an obstacle course they made, and what they found when they examined the footage.
Citation: Curiosity rover finds possible evidence of ancient explosive volcanoes on Mars (2016, June 14) retrieved 18 August 2019 from https://phys.org/news/2016-06-curiosity-rover-evidence-ancient-explosive.html Journal information: Proceedings of the National Academy of Sciences © 2016 Phys.org Explore further
The crossover between literature, performance, classicism and its modern interpretations will be on showcase at the 15th Bharat Rang Mahotsav, the National School of Drama’s (NSD) annual theatre festival.The festival will celebrate the legacy Saadat Hasan Manto, William Shakespeare and popular theatre in the perspective of the modern Indian stage.Announcing the 15-day theatre gala, NSD chairperson Amal Allana said the festival will bring to the Capital and twin venue of Jaipur a total of 87 plays, lectures, interactions, offsite projects and special packages. It will open with Also Read – ‘Playing Jojo was emotionally exhausting’Atmakatha, a two-hour play directed by Vinay Sharma, featuring former Bollywood actor Kulbhushan Kharbanda. It will mark the actor’s return to the stage, Allana said. ‘The wider variety of plays this year has allowed us to package them into categories. The ‘Manto section’ has six plays adapted from stories by Manto and the section on Shakespeare will explore the ‘inter-cultural influence on the dramatist’ with seven productions,’ Allana said, adding: ‘The focus will be on popular theatre that evolved from the Parsi form of theatre in the second half of 19th century.’ The 450 entries from which 87 were shortlisted were from across regions and genres that were not always ‘dependent on the government for support’. Also Read – Leslie doing new comedy special with NetflixThe Indian panorama with 11 productions and 52 other performances — adaptations, re-visitings, improvisations, devised plays and traditional renditions — will reflect contemporary theatre practises. The Shakespeare panorama will play host to the likes of indigenous improvisations of King Lear, a solo performance from Turkmenistan, an Assamese adaptation of Julius Caeser, a Hindi makeover of Twelfth Night, Piya Behroopia that played at the Globe Theatre in London last season, Footsbarn Theatre’s Indian Tempest as physical theatre. Wendy Jehlen of the US will present excerpts from Hamlet, Macbeth, Othello and Titus Andronicus in a choreographed non-verbal piece as The Knocking Within.A Malayalee adaptation, Yamadoothu: After the Death of Othello in Malayalam from Kerala, based on Shakespeare’s Othello will also be staged. Pointing to the trends in Indian contemporary theatre, Amal Allana said: ‘the trend to go back to traditional forms of theatre has waned’.‘We don’t have to go back to folk theatre and traditional theatre to sustain contemporary theatre. Plays are being staged as performances and devised scripts. There is more exchange and effort between theatre people because of greater a sense of participation and lack of original scripts,’ Allana said.She said: ‘The complexity of new theatre has brought in wake more non-verbal plays and physical theatre’. NSD director Anuradha Kapur said ‘there was a flowering of another kind of script that were meant to be read. We are reading scripts and performing them as well’. Bharat Rang mahotsav will feature plays divided into several categories.
Shahid Kapoor’s Haider with Vishal Bhardwaj is ready to come out, but that is not enough for the actor. His wish is that the filmmaker should make Kaminey 2 with him.While reports are doing the round that Shahid is, in fact, already a part of Kaminey 2, the actor said: ‘I would be very happy if Kaminey 2 happens.’ Released in 2009, Kaminey starred Shahid in a double role and he won accolades for his performance from all quarters. It also starred Priyanka Chopra and it brought out the news of the affair the two actors had, which lasted for a few months after the movie released. The actors, however, still maintain that they are in good terms with each other. Also Read – A fresh blend of fame‘I had an amazing experience with Vishal sir working on Kaminey and now Haider. I just hope he casts me in his next film and I hope that this film is Kaminey 2,’ the 33-year-old said here Wednesday on the sets of reality show Cine Stars Ki Khoj.In fact, Bhardwaj has already locked a story. ‘He has an amazing story and I think everyone should tell him to make it because he is difficult to convince. But he has a story and a romantic version of Dhan te nan also. I have been telling him he should do it, but he is a filmmaker and he has his own thoughts,’ he added.An adaptation of William Shakespeare’s play Hamlet, Haider also stars Shraddha Kapoor. The film will hit theatres on 2 October.
A grand welcome planned for Pakistan’s hockey team which won a silver medal in Champions Trophy was on Tuesday called off after a brazen Taliban attack on a military-run school that killed at least 160 people, mostly children.The Pakistan Hockey Federation said the ceremony has been cancelled following the attack on the Army Public School on Warsak Road in Khyber Pakhtunkhwa’s Peshawar city. The ceremony was planned to welcome the players who took Pakistan to the final of the just-concluded tournament in India after a gap of 16 years. Also Read – Khel Ratna for Deepa and Bajrang, Arjuna for JadejaThe players were to be driven in a motorcade to Lahore after their return home via the Wagah Border. The federation said the ceremony would be held at a suitable time. The team lost to Germany in the final. In one of the most gruesome attacks on children anywhere in the world, at least six Taliban militants stormed the school and went classroom-to-classroom shooting indiscriminately.At least 160 people, most of them children, were killed in the attack, which was a reaction to Pakistan military’s campaign against the militants.
After Gujarat Assembly Speaker, couple of IAS officers, Gujarat University Vice Chancellor, now Gujarat’s Minister of State for Health Shankarbhai Chaudhary has been tested positive. While, Vijay Mishra, a Samajwadi MLA from Gyanpur has also been tested positive for H1N1.
Kolkata: West Bengal Chief Minister Mamata Banerjee today remembered Swami Vivekananda on his 116th death anniversary and urged the people to live up to the ideals the spiritual leader espoused. “On this day, the great philosopher, Swami Vivekananda attained Mahasamadhi. Remembering him on this solemn occasion. Let us strive to live up to the ideals he espoused, Banerjee wrote on her Twitter handle. Swami Vivekananda, who passed away on July 4 in 1902, played an important role in the spiritual enlightenment of the masses. He spread the Vedanta philosophy in the West and established the Ramakrishna Math and Ramkrishna Mission to serve the poor. “He taught the world the true meaning of Hinduism: universal brotherhood,” Banerjee said.
Aggressive driving behaviour is a reflection of a person’s surrounding culture, both on the road and on a broader social level, says a study.The findings suggest that some countries and cultures may be more susceptible to aggressive or competitive driving behaviours due to their social environment, and that improvements in that arena would also be seen in driving behaviour.“The choice to be competitive versus cooperative always starts with culture, by the influences around us and the way other people behave, ‘said one of the researchers Haizhong Wang, assistant professor of transportation engineering at Oregon State University in the US. Also Read – ‘Playing Jojo was emotionally exhausting’“And it’s clear there’s a role for education and experience, where studies have shown the value of young drivers participating in driver education programmes and receiving positive guidance from their parents and peers,” Wang noted.The study also implies that different social conditions might ultimately translate into better drivers.However, these dangerous behaviours are becoming a worldwide phenomenon of almost epidemic proportions partly as a reaction to overcrowded road networks, the researchers said. Also Read – Leslie doing new comedy special with NetflixThe findings, published in the journal Procedia Engineering, showed that such behaviour is more pronounced in men than in women.The research was done with drivers in China where competitive driving is very common. The problems in China as it becomes increasingly crowded with drivers, however, reflect similar concerns at varying levels around the world, Wang said. In this analysis, the researchers concluded that drivers in congested situations generally believed that the chaotic traffic state was responsible for their competitive behaviour and they had no option other than to compete for space, the right-of-way, and gain advantages through speed and spacing.In simple terms, it was right and proper that they should try to keep up with or get ahead of traffic; that was the example being set for them, and they drove that way because everyone else did.However, the study also suggested that “personality traits draw on and are influenced by aspects of one’s social environment.” It is prevalent in India too where the surroundings play an important part.
Kolkata: The weather condition in the city will improve from Wednesday, leading to a further drop in temperature, predicted the Regional Metereological Centre at Alipore on Tuesday. Meanwhile, Sandakphu witnessed mild snowfall on Tuesday, for the first time this winter season. It was a light drizzle accompanied by snowfall.The weather office also predicted that the city’s sky may remain cloudy from Wednesday morning and there will be a little drizzle in some parts of the city as well as South Bengal districts. The districts may witness bright sunshine from Thursday, as the cyclonic storm ‘Phethai’ has been weakened. Also Read – Rain batters Kolkata, cripples normal life”As the cyclonic condition clears, the mercury will start to drop further from Wednesday. There will be light drizzle in some parts of the city, even on Wednesday. The cyclonic storm has lost momentum due to the constant blowing of the northwesterly wind in the state. The wind will intensify further, as soon as the sky gets cleared,” a senior official of the Alipore Met office said. It may be mentioned that the city and South Bengal districts witnessed light to moderate rainfall on Tuesday, as was predicted. ‘Phethai’ has been hovering in the coastal areas of Odisha after it turned into a low-pressure zone. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedIt may be mentioned that during last week, the minimum temperature had shot up as moisture in the air had been rising after the formation of a low pressure trough over Bay-of-Bengal. The mercury had started climbing due to the incursion of moisture since last week. The districts like North 24-Parganas, South 24-Parganas, Hooghly and Howrah received light rainfall overnight, while districts like East Midnapore, West Midnapore, Purulia and Bankura received light to moderate rainfall on Tuesday. The districts also experienced strong gusty winds. According to a weather official, the temperature may dip to 9 degree Celsius during Christmas this year. Traffic movement in various parts of the city was slow on Tuesday morning, due to the drizzle. The temperature on Tuesday remained around 16 degree Celsius. “The temperature on Wednesday may hover around 14 degree Celsius, while it will drop further from Thursday. As the clouds start disappearing from Wednesday, the mercury will slide further down,” the weather official said.