August 2019

Russian cosmologist suggests life could exist inside a black hole

first_img Citation: Russian cosmologist suggests life could exist inside a black hole (2011, April 13) retrieved 18 August 2019 from https://phys.org/news/2011-04-russian-cosmologist-life-black-hole.html © 2010 PhysOrg.com Black holes, as we all know, are entities that exist in space that have such strong gravitational forces that everything around them gets sucked in and swallowed up, never to be seen again. Well, not exactly, scientists know that deep inside rotating, charged black holes, past the event horizon (the point where time and space become one) things switch back to what would be considered normal (the Cauchy horizon) at least to the extent that photons can orbit the singularity. And it’s the existence of these photons that leads Dokuchaev to believe that other objects could conceivably exist as well, some of which could possibly harbor life forms; albeit their world would be radically different from what we know due to the presence of dramatic amounts of light from the photons that would also be trapped orbiting the singularity with them, not to mention constantly fluctuating tidal forces and bombardment by other energy sources.Dokuchaev, whose field is the study of the orbiting entities that do actually exist within the small subset of black holes, known as charged rotating black holes, as opposed to the Schwarzschild black hole (no movement) or Kerr black hole (no charge), clearly realizes that though his proclamations might be a bit extravagant, his science is clearly not. His theories expand on previous research that has shown that elementary light particles (photons) have been found to orbit the singularity in such black holes, in stable, periodic orbits. He asserts that there is no evidence to suggest that something larger, such as a planet with complicated chemistry could not do the same.Of course, if what Dokuchaev suggests is true, we’d almost certainly never know about it due to the impossibility of emissions from any such advanced civilizations escaping the immense gravity of the black hole in which they live; so the argument is rather moot, though certainly intriguing. (PhysOrg.com) — Going out on a limb, Russian cosmologist Vyacheslav Dokuchaev, of the Institute for Nuclear Research at the Russian Academy of Sciences in Moscow, has speculated in a paper published in arXiv, that due to the very unique conditions that exist past the event horizon in certain (charged and rotating) black holes, life could very possibly exist, and could very well have evolved into advanced civilizations. Answers to black hole evolution beyond the horizon? More information: Is there life inside black holes? by Vyacheslav I. Dokuchaev, arXiv:1103.6140v2 [gr-qc] arxiv.org/abs/1103.6140via Technology Review The stable periodic orbits of photon and planet. See http://arxiv.org/abs/1103.6140 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.last_img read more

How echidnas survive brush fires

first_img Citation: How echidnas survive brush fires (2016, April 13) retrieved 18 August 2019 from https://phys.org/news/2016-04-echidnas-survive.html © 2016 Phys.org Scientists have known for quite some time that echidnas, an egg laying mammal related to the platypus, are able to survive not just brush fires, but the aftermath when there is little to no food and sometimes a limited amount of breathable air. To learn more, they conducted a study of several of the animals that were living in Dryandra Woodland, southeast of Perth in Western Australia—many already had tracking devices that allowed for study of their movements. Managers of the preserve had decided to conduct a controlled burn in the area to make parts of the preserve more open to new types of vegetation, helping them to gain a stronghold.As the fire burned, the team monitored the activities of the echidnas, and continued to do so for several days thereafter. Though they were not able to positively identify the means by which the animals avoided being burned, they did find evidence that suggested that they likely holed up in logs thick enough to protect them. But it was their activity in the weeks after the fires had passed that was most interesting—the animals did not roam looking for food, instead they put themselves in and out of a torpid state, sometimes for as long as four days. The torpid state, the team explains, is similar to hibernation in other animals—they go into a deep sleep and their metabolism slows down. This allows them to drastically reduce their need for food and water, in essence, allowing them to wait for the smoke to clear and for food to become available once again.The researchers suggest the response to fire by the echidnas might serve as a model for how some mammals managed to survive a strike by an ancient asteroid millions of years ago, wiping out the dinosaurs—by going in and out of torpid states allowing them to last a long time on very little nourishment. (Phys.org)—A trio of researchers with the University of New England, Curtin University and the University of Western Australia has discovered how echidnas manage to survive brush fires. In their paper published in Proceedings of the Royal Society B, Julia Nowack, Christine Elizabeth Cooper and Fritz Geiser describe their study of the animals after a part of a nature preserve was deliberately set on fire to help fire-dependent vegetation become established. Explore further Study shows example of mammal adapting to fires by increasing torpor time Journal information: Proceedings of the Royal Society B Echidna. Credit: Jaganath/ Wikipedia More information: Julia Nowack et al. Cool echidnas survive the fire, Proceedings of the Royal Society B: Biological Sciences (2016). DOI: 10.1098/rspb.2016.0382AbstractFires have occurred throughout history, including those associated with the meteoroid impact at the Cretaceous–Palaeogene (K–Pg) boundary that eliminated many vertebrate species. To evaluate the recent hypothesis that the survival of the K–Pg fires by ancestral mammals was dependent on their ability to use energy-conserving torpor, we studied body temperature fluctuations and activity of an egg-laying mammal, the echidna (Tachyglossus aculeatus), often considered to be a ‘living fossil’, before, during and after a prescribed burn. All but one study animal survived the fire in the prescribed burn area and echidnas remained inactive during the day(s) following the fire and substantially reduced body temperature during bouts of torpor. For weeks after the fire, all individuals remained in their original territories and compensated for changes in their habitat with a decrease in mean body temperature and activity. Our data suggest that heterothermy enables mammals to outlast the conditions during and after a fire by reducing energy expenditure, permitting periods of extended inactivity. Therefore, torpor facilitates survival in a fire-scorched landscape and consequently may have been of functional significance for mammalian survival at the K–Pg boundary. Spines and fur of an echidna. Credit: Vmenkov/Wikipedia 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

Quantum speed limits are not actually quantum

first_img Both groups—one consisting of Brendan Shanahan and Adolfo del Campo at the University of Massachusetts along with Aurelia Chenu and Norman Margolus at MIT, the other composed of Manaka Okuyama of the Tokyo Institute of Technology and Masayuki Ohzeki at Tohoku University—have published papers on classical speed limits in Physical Review Letters.Over the past several decades, physicists have been investigating quantum speed limits, which determine the minimum time for a given process to occur in terms of the energy fluctuations of the process. A quantum speed limit can then be thought as a time-energy uncertainty relation. Although this concept is similar to Heisenberg’s uncertainty principle, which relates position and momentum uncertainties, time is treated differently in quantum mechanics (as a parameter rather than an observable). Still, the similarities between the two relations, along with the fact that Heisenberg’s uncertainty principle is a strictly quantum phenomenon, have long suggested that quantum speed limits are likewise strictly quantum and have no classical counterpart. The only known limitation on the speed of classical systems is that objects may not travel faster than the speed of light due to special relativity, but this is unrelated to the energy-time relation in quantum speed limits.The new papers show that speed limits based on a trade-off between energy and time do exist for classical systems, and in fact, that there are infinitely many of these classical speed limits. The results demonstrate that quantum speed limits are not based on any underlying quantum phenomena, but instead are a universal property of the description of any physical process, whether quantum or classical.”It is really the notion of information and distinguishability that unifies speed limits in both the classical and quantum domains,” del Campo told Phys.org.As quantum speed limits have potential applications for understanding the ultimate limits of quantum computing, the new results may help to determine which scenarios may benefit from a quantum speedup compared to classical methods. “Quantum speed limits have many applications, ranging from metrology to quantum computation,” del Campo said. “It is exciting to imagine the implications of the classical speed limits we have derived.” More information: B. Shanahan, A. Chenu, N. Margolus, and A. del Campo. “Quantum Speed Limits across the Quantum-to-Classical Transition.” Physical Review Letters. DOI: 10.1103/PhysRevLett.120.070401. Also at arXiv:1710.07335 [quant-ph]Manaka Okuyama and Masayuki Ohzeki. “Quantum Speed Limit is Not Quantum.” Physical Review Letters. DOI: 10.1103/PhysRevLett.120.070402. Also at arXiv:1710.03498 [quant-ph] Journal information: Physical Review Letters Quantum mechanics has fundamental speed limits—upper bounds on the rate at which quantum systems can evolve. However, two groups working independently have published papers showing for the first time that quantum speed limits have a classical counterpart: classical speed limits. The results are surprising, as previous research has suggested that quantum speed limits are purely quantum in nature and vanish for classical systems. Quantum speed limit may put brakes on quantum computers © 2018 Phys.orgcenter_img Citation: Quantum speed limits are not actually quantum (2018, March 15) retrieved 18 August 2019 from https://phys.org/news/2018-03-quantum-limits.html Explore further Source: pixabay 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

People working with cable operators to come under purview of Swasthya Sathi

first_imgKolkata: The Mamata Banerjee government will incorporate people working with cable television operators under its ongoing Swasthya Sathi Scheme. At the same time, they would also get themselves enrolled under the Samajik Suraksha Yojana (SSY) implemented by the state Labour department.While addressing the gathering of both multiple-system operators and local cable operators from different parts of the state, Banerjee said that the workers involved in the sector will be getting the benefits of Swasthya Sathi Project, which is already ongoing. Also Read – Heavy rain hits traffic, flightsIt may be mentioned that the state government has brought more than 3 crore people under the Swasthya Sathi Scheme. There are around 25,000 local cable operators in the state and the people working with them will be getting the benefits of Swasthya Sathi.The Chief Minister had launched the scheme on December 30 in 2016 and civic police volunteers, disaster management workers, ASHA workers, self-help groups, home guards, ICDS workers and other contractual workers get a basic health coverage of Rs 1.5 lakh per year under the scheme. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedIn case a person suffers from diseases like cancer, liver disease, blood disorder or need to undergo neuro surgery or cardio thoracic surgeries then the coverage will go up to Rs 5 lakh. Later, the Chief Minister had also decided to extend the benefits of the scheme to retired sports personalities and technicians from the film and television industry. Apart from the Swasthya Sathi scheme, people involved with the cable operators can also get enrolled under the Samajik Suraksha Yojana. A beneficiary has to give Rs 25 and the state government gives Rs 30 and the person gets Rs 2 lakh after the age of 60 years and a pension of Rs 1,500 per month.There are several other benefits under the scheme as well. One will also get Rs 25,000, once his or her daughter graduates from an educational institution.In the same breath, she assured the cable television operators that they can continue working without any trouble in Bengal. “I don’t know about the entire country, but you all can work in peace in Bengal,” she said.last_img read more

Cal HC not to interfere in Bengal panchayat poll raps SEC

first_imgKolkata: The Calcutta High Court today refused to interfere in the West Bengal panchayat election schedule announced by the State Election Commission but pulled up the poll body, asking it to conduct itself in a neutral manner and consider its observations as a wake up call. Making scathing observations against the Commission over its conduct with regard to the panchayat polls process, a division bench comprising Justice B Somadder and Justice A Mukherjee said the SEC had floundered in upholding its constitutional obligations. Also Read – Heavy rain hits traffic, flightsThe bench said that it was expected that the Commission would redeem itself by treating the court’s observations as a wake-up call.The court refused to interfere in the schedule announced by the Commission on a petition claiming that notification should provide all dates from nomination to that of result and prayed for quashing of the notification.The bench said that the SEC’s decision to reduce the number of phases for panchayat elections in the state from 3 to 1 in it second notification without providing necessary clarification inevitably raised eyebrows and was avoidable. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedThe SEC had initially announced that panchayat elections were to be held in three phases from May 1 to 5, but in another notification following a single bench order that had directed rescheduling of elections, it had appointed only May 14 for polling in the entire state.The court said that the SEC had itself invited litigations by its conduct and observed that it should have instead acted in a manner that allayed apprehensions and grievances of stakeholders. The bench also directed that the observations made by this court could not be used by any political party or individual participating in the elections.The observations were made in its order disposing of an appeal by Ritju Ghosal, a general secretary of West Bengal state unit of Indian National Congress, against a single bench judgement that refused to interfere in the SEC decision on the poll schedule.last_img read more

Secret garden

first_imgLandscaping and gardening are closely associated with each other and a vibrant city like Delhi has a bountiful horticultural variety. Due to space constraints and other climatic conditions, the huge potential of many gardens is often left untapped. Delhi has a rich past; it is a place where age old heritage monuments beautifully coalesce with tall skyscrapers. One of the great challenges lies in beautifying it in the same merits. Therefore, to cater this Delhi Tourism organises the Garden Festival in the Capital that started off yesterday at Garden of Five Senses. Chief Minister of Delhi, Arvind Kejriiwal inaugurated the festival yesterdqay. Also Read – ‘Playing Jojo was emotionally exhausting’The overarching theme of the festival is Landscaping with Hanging Plants and one can draw inspiration from the innovative opportunities being provided at the festival to create a garden of one’s own dreams.Delhi Tourism has been organising this festival in association with Government of Delhi from past 27 years and drawing different yet unique themes each time. “All climber and hanging plants can completely change the look and feel of a certain surrounding. Not only will they beautify but majorly help in reducing the noise and sound pollution in the city. Some of the plants suggested for Delhi are Neem, Philkan, Alstonia, Kanak Champa, Khirni along with others” says Satish Mathur, a retired director of horticulture at Rashtrapati Bhavan. Also Read – Leslie doing new comedy special with NetflixBesides, showcasing the variety of different plants in Delhi, the Garden Tourism festival aims to usher in a new wave of vibrancy in the tourism circuit of the capital. “Foreign countries have specially designed parks, which cater to the tourists. This festival will be a common ground for plant lovers and stakeholders to create many similar attractions for tourist visiting the capital,” says Ramesh Tiwari, MD & CEO, Delhi Tourism.  The venue for Garden of Five Senses is indeed a special one, which corresponds to the essence of the three-day festival. The 20 acre venue for Garden of Five Senses is indeed a special one. It has more than 325 species of plants. This serene place has various attractions such as court of palm, court of cacti, herbal gardens, tree museum, topiary gardens, Zen gardens, aromatic gardens and butterfly zone. The concept of gardening needs further popularity and new variety of hanging plants need to be introduced before the people. Besides its underlying theme of hanging plants, the 28th Garden Tourism Festival will also present new and modern gardening equipments. From petrol lawn movers to mechanical trimmers and other equipments will be up for demonstration and sale. Introduce yo28th urself to the art of hanging plants by experimenting with interesting combination of varieties like Jade, Widelia and Wandering Jew, providing a spectrum of attributes to your landscape. Space constraints and contrasting architectural styles can be paralleled by trying box and tray gardens that can easily be put on office desks and window panes. The festival will go beyond natural surprise with delightful cultural performances every evening to enthrall the visitors.last_img read more

Colourful tribute to the elements

first_imgAs he celebrates his 93rd birthday today, a new body of work by the eminent artist is being showcased at his solo show Aarambh at the Vadehra Art Gallery here.The exhibition displays a spectacular explosion of colours and sublime diffusion of erotica into the spiritual from his vast body of work.Raza, a stalwart of the Progressive Modern artists group, says he finds inspiration both in introspection and in the outside world.While his iconic Bindu, and the geometrical shapes remain constant in his work, the difference, ‘lies in what he does with colours.’ Also Read – ‘Playing Jojo was emotionally exhausting’Black, the Padma Shree awardee says, is the mother of all colours. It is the point from where all energy in the universe emanates as well as the point into which the energy converges, referring to the Black Bindu from among his recent artworks.“He speaks the language of colours and believes that the colours must be such that they can speak not only to the readers, but also to each other,” Ashok Vajpayee, Chairman, Lalit Kala Academy stated.Raza’s work is a reconciliation of opposites. Also Read – Leslie doing new comedy special with Netflix“In his work, the sacred and the sensuous; the spiritual and the erotic co-exist,” says Vajpayee.A common pattern evident in Raza’s works is the existence of white spaces on canvas, deliberately left unpainted, often giving a three-dimensional effect. “This he does to assert the notion that a painting is a panting on canvas,” says Vajpayee who claims to have known the artist for more than three decades now.Growing up in Barbaria in Madhya Pradesh to a forest ranger father Raza was trained in art at Nagpur and Bombay. He has been influenced by nature from his early childhood, which is reflected in his artworks In one of his paintings, Raza expresses his impression of Chhattisgarh in an uncanny combination of Bindu and the brush strokes in water colour.“In his art, like meditation, the essential geometry remains the same, but the meaning changes,” says Vajpayee. The exhibition which is scheduled till March 18, has a total of 44 canvases and paper works on display.last_img read more

Housing complex for the homeless

first_imgBALURGHAT: Those who are homeless and have always been moving to and fro in search of shelter, either to avoid the sweltering summer heat or incessant rainfall, finally have something to rejoice about. The TMC-led Balurghat Municipality has undertaken a mega project to build a housing complex for the homeless at Khadimpur Loknath Mandirpara area, within two months.Official sources informed that the project has been jointly taken up by both the Centre and state. A fund amounting to around Rs 1,22,00,000 has already been sanctioned, to finish the entire project work within the stipulated period. Balurghat civic body chairman Rajen Shill said: “We can accommodate 50 homeless persons in the complex. Initially, we have decided that a four-storey building will be established with the fund. Construction of the ground floor has already been completed, while we have targeted to end the project work by the end of July.”last_img read more

first_imgAiming to be more accurate in collating and publishing ICSE and ISC results, the Council for the Indian School Certificate Examinations will introduce a digital pen and tablet-based technology for the examiners to evaluate answer scripts from next year. “The Council is planning to introduce the Live Ink Character Recognition (LICR) Solution technology while evaluating answer scripts by the examiners,” Chief Executive and Secretary of CISCE Gerry Aarathoon said here on Thursday.“LICR is a technology which incorporates a re-purposed digital pen and tab used by examiners to evaluate answer scripts and help publish results in a shorter time,” he said. The technology will be accurate and would reduce the recheck requests. It was planned to be introduced from 2016, Aarathoon added.last_img read more

KMC launches app to prevent dengue malaria

first_imgKolkata: A smartphone app aimed exclusively at the prevention of vector-borne diseases by the Kolkata Municipal Corporation, was launched on Thursday afternoon by Mayor Sovan Chatterjee.This is the first time in India when a civic body has brought out an app exclusively on the preservation of vector-borne diseases. The app will be available only on android devices as of now and support for iPhone users will come on September 7.It may be mentioned that Chief Minister Mamata Banerjee has instructed all the civic bodies in the state to conduct garbage cleaning drives regularly and take immediate steps when people suffering from fever are detected in the areas under their jurisdiction. Also Read – Rain batters Kolkata, cripples normal lifeThe app contains the symptoms of dengue and malaria, along with the dos and don’ts that need to be followed to prevent occurrence of the diseases.The addresses of all the 144 malaria detection centres and 15 dengue detection centres have been provided in the app. The telephone numbers and e-mail IDs of key persons in KMC’s Health department have also been provided. The people will also get information about new announcements of KMC’s Health department through the app. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedSenior civic officials said the app will help create awareness among the people. The state government has already given Rs 4 crore to KMC to carry out massive awareness programmes to prevent dengue and malaria.The civic authorities had launched a massive awareness campaign in January and started a drive against vector-borne diseases, keeping in mind the fact that mosquitoes have changed their breeding season due to global warming.Special teams have been formed, comprising health workers and their counterparts in the Conservancy department, to visit every household for ensuring that garbage gets cleaned everyday and the underground reservoirs and overhead tanks are cleaned as well. The civic authorities have also urged people to clean the containers where water is stored, at least once a week. Visits are being regularly made to institutional buildings, hospitals, nursing homes and central and state government offices. The KMC authorities have urged the management that looks after the institutional buildings, to see to it that broken and unused furniture is kept on the roof and empty plastic cups and bottles are cleaned from the premises.Civic officials regretted that despite intense awareness campaigns, people are not following KMC’s instructions and in many new constructions sites, garbage is not cleaned regularly and water stored in containers is not cleared weekly.Also, some people have reservation against KMC clinics, as blood tests for dengue and malaria are conducted free of cost and medicines are also given for free.last_img read more