Research model shows monsoon change in India may be result of manmade

first_img © 2011 Hot dust and moisture collide to fuel Asian summer rainy season More information: Anthropogenic Aerosols and the Weakening of the South Asian Summer Monsoon, Science, Published Online September 29 2011, DOI: 10.1126/science.1204994ABSTRACTObservations show that South Asia underwent a widespread summertime drying during the second half of the 20th century, but it is unclear whether this trend was due to natural variations or human activities. We used a series of climate model experiments to investigate the South Asian monsoon response to natural and anthropogenic forcings. We find that the observed precipitation decrease can be attributed mainly to human-influenced aerosol emissions. The drying is a robust outcome of a slowdown of the tropical meridional overturning circulation, which compensates for the aerosol-induced energy imbalance between the northern and southern hemispheres. These results provide compelling evidence of the prominent role of aerosols in shaping regional climate change over South Asia. In their paper, the team says that prior to human interference, the monsoon season came about as warm most air gathered over the Indian and Arabian seas (due to more sunlight in the summer months), then traveled northeasterly (because air moves naturally from high pressure systems to low) where it was pushed higher up into the atmosphere due to the heat from the ground below. As it moved higher, it cooled, causing the creation of clouds and eventually the formation of raindrops which began to fall, resulting in massive amounts of rain in the north central regions.In the latter half of the last century however, things changed due to the rapid increase in the amount of aerosols being pumped into the atmosphere from the burning of fossil fuels and from cook fires. Such activities, the researchers say, effectively created a sort of umbrella over India that reflected back some of the heat from the sun, cooling the surface, which meant that not as much moist air was pulled up from the ocean, resulting in less rain falling in the more northern regions and more rain falling in the south and in the ocean. Their model also accounts for the increase in rainfall in neighboring Pakistan where flooding due to excess rain has been in the news of late.The model was developed in hopes of explaining the real world measured changes in rainfall in the area. Records indicate that rainfall in north central India has fallen by as much as 10% during the time period 1950 to 1999, which for India is serious business as up to 80% of the rain the country gets occurs during the monsoon season.On a positive note, Ming points out that aerosols, unlike greenhouse gas emissions, don’t linger in the atmosphere for very long, thus, if changes are made in particle emissions, its likely rain patterns would soon return to normal. Explore furtherlast_img read more

Mysterious glowworm found in Peruvian rainforest

center_img Citation: Mysterious glowworm found in Peruvian rainforest (2014, November 21) retrieved 18 August 2019 from Further study of the half inch long larvae revealed that the photoluminescence served just a single purpose, attracting prey. They would sit waiting with their jaws spread wide open. When the light they were emitting attracted something, typically ants or termites, the jaws would snap shut capturing the bug thus providing a meal. Pomerantz collected several samples of the larvae and took them back to a lab where they were tested—he and his colleagues found the larvae would snap shut on just about any bug that touched its jaws. He compared them to the giant worms in the 90’s sci-fi comedy, Tremors—only these were much smaller of course.In the wild the larvae live in the ground—they push just their heads out, keeping their bodies hidden, revealing just their glowing heads—bugs, like moths to a light on the porch in summer, are attracted to the light and get eaten. The team members still don’t know what kind of beetle the larvae would grow into, but are determined to find out—they aren’t even sure if they are from known species. There are a lot of different kinds of click beetles, approximately 10,000 species, about 200 of which are known to be bioluminescent. The entomologists believe the larvae get their luminescence from a molecule called Luciferin, which is also found in the compound used by fireflies to light up the night sky. Explore furtherlast_img read more

Genetic study suggests there are variants that can increase chances of success

first_img More information: Daniel W. Belsky et al. Genetic analysis of social-class mobility in five longitudinal studies, Proceedings of the National Academy of Sciences (2018). DOI: 10.1073/pnas.1801238115AbstractA summary genetic measure, called a “polygenic score,” derived from a genome-wide association study (GWAS) of education can modestly predict a person’s educational and economic success. This prediction could signal a biological mechanism: Education-linked genetics could encode characteristics that help people get ahead in life. Alternatively, prediction could reflect social history: People from well-off families might stay well-off for social reasons, and these families might also look alike genetically. A key test to distinguish biological mechanism from social history is if people with higher education polygenic scores tend to climb the social ladder beyond their parents’ position. Upward mobility would indicate education-linked genetics encodes characteristics that foster success. We tested if education-linked polygenic scores predicted social mobility in >20,000 individuals in five longitudinal studies in the United States, Britain, and New Zealand. Participants with higher polygenic scores achieved more education and career success and accumulated more wealth. However, they also tended to come from better-off families. In the key test, participants with higher polygenic scores tended to be upwardly mobile compared with their parents. Moreover, in sibling-difference analysis, the sibling with the higher polygenic score was more upwardly mobile. Thus, education GWAS discoveries are not mere correlates of privilege; they influence social mobility within a life. Additional analyses revealed that a mother’s polygenic score predicted her child’s attainment over and above the child’s own polygenic score, suggesting parents’ genetics can also affect their children’s attainment through environmental pathways. Education GWAS discoveries affect socioeconomic attainment through influence on individuals’ family-of-origin environments and their social mobility. Credit: CC0 Public Domain Scientists predict reading ability from DNA alone Journal information: Proceedings of the National Academy of Sciences Citation: Genetic study suggests there are variants that can increase chances of success in life (2018, July 10) retrieved 18 August 2019 from A team of researchers from the U.S., the U.K. and New Zealand has found genetic variants that appear to confer success in life. In their paper published in Proceedings of the National Academy of Sciences, the group describes their study and what they found.last_img read more

Coupling qubits to sound in a multimode cavity

first_imgThe device in its copper cavity. Credit: Sletten et al. In their paper, published in Physical Review X, the researchers outline how they coupled a qubit to surface acoustic waves and successfully engineered a sharp frequency dependence in the qubit-phonon interaction. The interference resulting from this process generated a high-contrast frequency structure in the qubit-phonon interaction.”Inspired by the successful use of qubits to control quantum states of light, we wanted to explore what we can achieve by coupling qubits to sound,” Lucas Sletten, one of the researchers who carried out the study, told “We asked ourselves: Is it possible to resolve that sound in a solid is, in fact, quantized? Can sound be used to store and process quantum information? Can these particle-like quanta of sound, termed phonons, be counted without destroying them? If so, could you play this trick with more than one mode at a time? And more generally, what is possible with sound that can’t be done with light?”Sletten and his colleagues used a device made up of a superconducting qubit that interacts strongly with phonons trapped in an acoustic cavity. The device was placed inside a microwave resonator that serves as a sensitive probe of the qubit. This allowed the researchers to measure and control the qubit, while observing its interaction with phonons. “The phonons live in an acoustic resonator that functions like a musical instrument, but at frequencies 20 octaves above the highest note on a piano,” Sletten said. “Just like an instrument, there are different notes, or modes, that can live within our resonator. The electrical analog of such a multi-mode resonator would be many meters long and a nightmare to implement on chip.”A mode within the resonator corresponds to an integer number of ripples fitting exactly into the box, or cavity, that confines the sound waves. To sense the motion of the trapped phonons, Sletten and his colleagues connected the qubit to the acoustic resonator using a transducer that transforms motion into electrical current. When sound is excited in their resonator, therefore, the qubit sees a current that alters its energy. Double-slit qubit concept and device. Credit: Sletten et al. Explore further “Another insight from our work is that the slowness of sound can be a valuable resource in engineering quantum systems,” Sletten said. “The long time it takes for a phonon to bounce back and forth between the mirrors is what allows the cavity to support multiple modes. Additionally, we leverage a long delay inserted in the middle of our transducer to precisely control how the qubit interacts with each mode, a crucial ability in counting phonons in a multi-mode cavity.” In the future, the research conducted by Sletten and his colleagues could pave the way towards the development of effective techniques to control acoustic quantum states. Meanwhile, the researchers plan to continue exploring the use of phonons in quantum science.For instance, they would like to investigate whether it is possible to entangle several different phonon modes (‘notes’) based on their shared interaction with a qubit. If confirmed experimentally, this would prove the huge potential of phonons for quantum information processing applications. “Acoustic systems are also a promising interface between different quantum platforms, such as superconducting qubits, quantum dots, and optical photons, and may also prove powerful tools for investigating the types of surface physics that may be limiting some cutting edge quantum technologies,” Sletten added. More information: L. R. Sletten et al. Resolving Phonon Fock States in a Multimode Cavity with a Double-Slit Qubit, Physical Review X (2019). DOI: 10.1103/PhysRevX.9.021056 Credit: Sletten et al. Phonon-mediated quantum state transfer and remote qubit entanglement Citation: Coupling qubits to sound in a multimode cavity (2019, July 11) retrieved 18 August 2019 from “We engineered a system sensitive enough that even the quietest sound allowable by quantum mechanics, a particle-like single phonon, shifts our qubit’s energy enough for us to notice,” Sletten said. “Moreover, this detection does not destroy the phonons we measure. We can count phonons not only for one mode of the cavity but for several, demonstrating we can take full advantage of our multi-mode cavity.” The findings gathered by Sletten and his colleagues show that superconducting qubits can interact with sound waves strongly enough to reveal the quantum nature of sound, without a direct exchange of energy taking place. By attaining sensitivities high enough to break a sound wave into quantized parts, the researchers have moved one step closer to achieving excellent quantum control of acoustic systems. Journal information: Physical Review X In a recent study, researchers at the University of Colorado have resolved phonon Fock states in the spectrum of a superconducting qubit coupled to a multimode acoustic cavity. Fock states (or number states) are quantum states with a clearly defined number of particles. These states play a crucial part in the second quantization formulation of quantum mechanics. © 2019 Science X Network 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

Between the worlds of romance and dreams

first_imgThe works of artist Suhas Roy, in his exhibition titled, Simply Suhas will be on display from 18 December.All the elements in his works ensure that his richly romantic subjects do not touch extreme syrupy and stereotypical portrayals. Instead, their very patent beauty veers towards melancholic grace and elegance. This graceful portrayal of his subjects has much to do with his choice of materials – crayons, charcoal and brush. Art works are usually inspired by life around him, but his themes are as much influenced by the everyday world as they are rooted in fantasy. The vast and complex texture of life is seen as mystical and dark in his work. Also Read – ‘Playing Jojo was emotionally exhausting’The mystical flavour of his works arose from his interpretations of the ‘unknown’. Revealing his philosophy, the artist said ‘I want to prove that the business of art is simple’. Roy has proved that it is not necessary to fret and fume or deliver profound sermons. Success can come from delicate little strokes, small but honest commitments and simple joys. A fine blend of beauty and simplicity remain the hallmark of Suhas Roy’s work. His subjects are romanticised, inhabiting the dreamlike world between sensuality and innocence. This show will bring to the viewer, a rare combination of lasting beauty and nuanced depth-never compromising one for the other.When: 18th December, 10 am onwardsWhere: Open Palm Court Gallery, India Habitat Centrelast_img read more

Food connects

first_imgIn an endeavor to bring the SAARC nations together to jointly address the issue of employment and enhance regional integration, Sasian – South Asian Festival is being organised in the Capital At Hotel Ashok. The event will be a launch-pad for sustainable, cross cultural collaborations of South Asians across the globe.South Asian Festival will also host Lotus Bazaar which is a 4-day-long festival and will include a series of trans-disciplinary workshops, events, performances, symposia, exhibitions and fests. The Bazaar will offer space for direct retail to a selected few artists, artisans and cultural enterprises from all 9 South Asian countries attempting to connect the above to the global market. Also Read – ‘Playing Jojo was emotionally exhausting’Lotus Bazaar will also host South Asia’s first food festival named Sanjha Chulha, curated by Pushpesh Pant to promote the incredible variety of local and regional cuisines of South Asia showcasing the diversity of culinary art.The aim of the festival is to reverse de-skilling of artisans and revive the rich traditions of South Asia and to provide the traditional artisan with dignified options.When: March 28 – 31 Where: Hotel Ashokalast_img read more

Transfat weakens memory in young men

first_imgConsumption of higher amount of dietary transfatty acids, commonly used in processed foods to improve taste, texture and durability, may lead to poorer memory in young men, new research has found.On average, men aged 45 and younger recalled 86 words; however, for each additional gram of dietary trans fatty acids (dTFA) consumed daily, performance dropped by 0.76 words.This translates to an expected 12 fewer words recalled by young men with dTFA intake levels matching the highest observed in the study, compared to otherwise similar men consuming no trans fats. Also Read – ‘Playing Jojo was emotionally exhausting’“Trans fats were most strongly linked to worse memory in men during their high productivity years,” said lead author Beatrice Golomb, professor of medicine at University of California San Diego School of Medicine in the US.“Trans fat consumption has previously shown adverse associations to behaviour and mood — other pillars of brain function. However, to our knowledge a relation to memory or cognition had not been shown.”After adjusting for age, exercise, education, ethnicity and mood, the link between higher dTFA and poorer memory was maintained in men 45 and younger. Also Read – Leslie doing new comedy special with NetflixAn association of dTFA to word memory was not observed in older populations.The research was primarily focussed on number of men and women in the same age group, which was too small to draw conclusions about whether the link held true for them as well.“As I tell patients, while trans fats increase the shelf life of foods, they reduce the shelf life of people,” Golomb said.last_img read more

12 lakh tonnes of pulses seized states asked to continue raids

first_imgAsking different states to continue raids to check hoarders, the union government on Thursday said over 1.2 lakh tonnes of pulses had been seized across the country so far.”The state governments have continued operations to check hoarding of pulses. So far 9,304 raids have been conducted and 1,20,907.90 tonnes of pulses seized,” union ministry of consumer affairs, food and public distribution said in a statement.The ministry advised the state governments to continue the drive against hoarders under the Essential Commodities Act.The seized pulses would be released in retail markets across the country to tame skyrocketing prices, that touched Rs.200 per kg for arhar.Earlier, state-run Metals and Minerals Trading Corporation of India (MMTC) had floated a tender to import 18,000 tonnes of pulses (both tur and urad).last_img read more

Cong NCP boycott CMs tea party on eve of Maha winter session

first_imgThe Congress and NCP on Sunday boycotted a customary tea party hosted by Chief Minister Devendra Fadnavis here on the eve of winter session of the state Legislature and accused the BJP-Shiv Sena government of failing on all fronts.The opposition leaders also reiterated that a scam of Rs 4000 crore has taken place in distribution of pulses in the state.In a joint press conference, leaders of the NCP and the Congress accused the BJP-led NDA government of failing to rein in suicides by farmers. Also Read – Punjab on alert after release of excess water from Bhakra dam“…There is a shortfall in revenue collection; malnutrition deaths are on rise, the crime rate is also on rise in state, particularly in Nagpur,” said the Leader of Opposition in Assembly, Radhakrishna Vikhe Patil of Congress.He was echoed by other leaders including the Leader of Opposition in Council, Dhananjay Munde and former deputy Chief Minister Ajit Pawar (both NCP).“The combined opposition has boycotted the customary tea party with Chief Minister (in protest against) the BJP-Shiv Sena government’s failure on every front,” said Vikhe Patil. Also Read – Union Min doubts ‘vote count’ in Bareilly, seeks probeHe said the saffron alliance of BJP and Sena had accused the Congress-NCP combine of “misrule” of 15 years when they came to power last year.“However, within a span of one year this government has undermined 15 years of our work,” the Congress leader told reporters after emerging from a combined meeting of the opposition parties.Vikhe Patil said the government stood “fully exposed” in the pulses scam and “we have already demanded resignation of Food and Civil Supplies Minister (Girish Bapat)”.last_img read more

Kuchipudi dance recital to enthrall the audiences

first_imgTo give a visual treat to her audience, Divyangana, a young and dynamic Kuchipudi dancer will be performing at Kamani auditorium on December 26. The dance recital will commence with ‘Ganesh Stuthi’, a customary prayer to the Gods for a successful show.This will be followed by ‘Tarana’, a Hindustani musical item and a composition of Bharat Ratna Pandit Ravi Shankar in Raag Bhairavi and Taal Eka. In this specific dance form, dancers are depicted as sculptures that come to life and dance happily in the temple’s celebration but freezes back into sculptures towards the end. Also Read – Add new books to your shelfNext in line is ‘Bhamakalapam’, which is a Sringara Kavya – practical exposition of Natya, Sangeeta, and Tala Shastras, altogether composed by Siddhendra Yogi. Even today, it is the most popular dance number and invariably the dream of every Kuchipudi artist to dance in the role of Satyabhama once in their lifetime. The dance number starts with Satyabhama entering the stage with a song that introduces her as the daughter of King Satrajeet, claiming to be the most beautiful amongst all women and the beloved of her lord. Also Read – Over 2 hours screen time daily will make your kids impulsiveThis will be followed by ‘Sason Ki Mala’ – a popular Meera Bhajan. Post that, one can witness ‘Tarangam’ based on Raag Mohana and Taal Adi. ‘Tarangam’ marks the climax of a traditional Kuchipudi recital which depicts the famous stories of Krishna’s childhood. This item ends with a display of exquisite virtuosity as the dancers execute intricate footwork patterns by dancing on the rim of a brass plate while coordinating with complicated rhythmic patterns.Divyangna Ahuja is one of the most promising disciples of Padmabhushan and Padmashree Dr Raja Radha And Kaushalya Reddy. She has been trained at the institution named Natya Tarangini and emphazises on the perfection of techniques, foot work and body movement with a fine balance of ‘Abhinaya’.last_img read more