Month: August 2019

Another piece in the dark matter puzzle

first_img 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. Most scientists agree that most of the matter in the universe is dark. Dark matter, which is undetectable through direct observation, can only be inferred because of its effects on the matter that we can see. The blue and red haze is the x-ray emission from the gas. The greencontours represent the gravitational potential mapping the mass distributionin the cluster of galaxies. The authors looked at the the matter “blob” to theright of the yellowish gas front. This blob originally came from theleft, and within some 100,000 years it moved through the larger blob tothe left, where the gas was separated. Credit: Data from the Chandra x-ray telescope, courtesy of Signe Riemer-Sørensen. “In principle,” Signe Riemer-Sørensen, a scientist at the Dark Cosmology Centre at the University of Copenhagen, tells PhysOrg.com, “dark matter can’t be seen directly. We know it has to be some kind of particle that we have not seen on earth, and that it can exist without being detected here.”Riemer-Sørensen is one of many scientists around the world interested in studying dark matter. Because it is so prevalent, physicists agree that understanding how dark matter works is an important fundamental question that could lead to a better knowledge of the universe, and the basic laws upon which it operates. Riemer-Sørensen and her group, which also consists of scientists from the University of Patras and the Aristotle University of Thessoaloniki in Greece, and the University of Oslo, are working on a way to pin down some of the characteristics of dark matter.“We took one specific theory about dark matter,” Riemer-Sørensen explains. “We look at a specific type of decaying particles, and if they represent dark matter, they will decay and transform into photons in x-rays.” The particles in question are axions, hypothetical elementary particles used in theories describing “extra” dimensions. The idea, she says, is to look for an area of the universe that has a great deal of dark matter, and then look for weak x-ray emissions. Riemer-Sørensen and her peers looked at colliding clusters of galaxies. “A good place to do this is clusters of galaxies because they are very heavy and consist of approximately 85 percent of dark matter. The stars and galaxies are only about five percent, and then there is about 10 percent hot gas, which does also emit x-ray.”She points out that the galaxies within clusters of galaxies do not collide in the classical sense. Rather, they pass through each other. “The only thing colliding is the gases in the galaxy cluster.” During the galactic collision, the gases are displaced due to friction. “You compare this to the gravitational potential from dark matter,” Riemer-Sørensen continues. “Because the two galaxy clusters have collided, and the gas has been displaced. In a normal cluster of galaxies, the galaxies, the gas, and the dark matter are all contained within the same region. In the colliding case there is a clear separation, and to find the putative x-ray emission from axions, we look in regions where there is a lot of mass, but very little gas.”So, did Riemer-Sørensen and her colleagues find the weak dark matter x-ray emissions? “We didn’t find any clear signs of x-ray emissions from axions in these regions,” she says. “And that tells us something about dark matter.” If dark matter particles do follow the reactions of decay set forth in the theory of axions as dark matter, then dark matter has an extraordinarily long lifetime. “If dark matter does decay,” Riemer-Sørensen insists, “then the lifetime of the axions is at least three million billion years, which is twenty thousand times longer than the lifetime of the universe.”“This is a piece of information that tells us something about how dark matter must behave,” Riemer-Sørensen continues. “So for technical reasons x-rays can currently be eliminated as a way to detect it.”She hasn’t stopped trying to detect dark matter more directly, however. “Now we’re working on going into gamma rays to see if there’s a signature there.”Dark matter may have stumped scientists for three decades, but little by little the puzzle is starting to fit together.Copyright 2007 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. Citation: Another piece in the dark matter puzzle (2007, October 5) retrieved 18 August 2019 from https://phys.org/news/2007-10-piece-dark-puzzle.htmllast_img read more

Light meet matter Singlephoton quantum memory in diamond optical phonons at room

first_img © 2015 Phys.org Experimental concept, energy level diagram, and setup. (a) The memory protocol. A horizontally (H) polarized single photon (green, 723 nm) is written into the quantum memory with a vertically (V) polarized write pulse (red, 800 nm). After a delay τ, an H-polarized read pulse recalls a V-polarized photon. (b) Energy levels in the memory. The ground state j0i and the storage state |1>correspond to the crystal ground state and an optical phonon, respectively. The signal photon and the read-write pulses are in two-photon resonance with the optical phonon (40 THz) and are far detuned from the conduction band j2i. (c) The experimental setup. The laser output is split to pump the photon source and to produce the orthogonally polarized read and write beams. The photons are produced in pairs with one (signal) at 723 nm and the other (herald) at 895 nm. The signal photon is stored in, and recalled from, the quantum memory. The herald and signal photons are detected using APDs and correlations between them are measured using a coincidence logic unit. Credit: D. G. England, K. A. G. Fisher, J-P. W. MacLean, P. J. Bustard, R. Lausten, K. J. Resch, and B. J. Sussman, Storage and Retrieval of THz-Bandwidth Single Photons Using a Room-Temperature Diamond Quantum Memory, Phys. Rev. Lett. 114, 053602 (2015). Recently, scientists at National Research Council of Canada, Ottawa and Institute for Quantum Computing, University of Waterloo demonstrated storage and retrieval of terahertz-bandwidth single photons via a quantum memory in the optical phonons modes of a room-temperature bulk diamond. The researchers report that the quantum memory is low noise, high speed and broadly tunable, and therefore promises to be a versatile light-matter interface for local quantum processing applications. Moreover, unlike existing approaches, the novel device does not require cooling or optical preparation before storage, and is a few millimeters in size. The scientists conclude that diamond is a robust, convenient, and high-speed system extremely well-suited to evaluating operational memory parameters, studying the effects of noise, and developing quantum protocols.Prof. Benjamin J. Sussman discussed the paper that he, Prof. Kevin Resch, Dr. Duncan G. England, and their colleagues published in Physical Review Letters. “The possibility of using single photons in quantum technologies offers a host of new opportunities in measurement and communications,” Sussman tells Phys.org. “However, it’s challenging to do so because the light we typically use – that is, from the sun, light bulbs, or lasers – contains tremendous numbers of photons.” Therefore, much of the technology for manipulating and measuring light (including naturally-evolved light-detecting biological organs, such as our eye) have been designed to deal with larger numbers of photons – and in addition, background noise from the faintest light source can mask these single photons.”Creating a single photon is also a formidable problem,” Sussman continues, adding that to generate single photons the scientists employ a low probability stochastic quantum optics process called spontaneous parametric down-conversion (SPDC). The method of generation is very effective, but the challenge is that – being a probabilistic process – a photon is generated not on demand, but unpredictably. “We have to wait for success and then perform an experiment, which means most of the time the experiment fails,” Sussman explains. “However, quantum memories are very interesting because they act as photon buffers, and can convert a probabilistic process into a deterministic one. This effectively turns a repeat-until-success single-photon source into an on-demand source.” , Science Explore further Citation: Light, meet matter: Single-photon quantum memory in diamond optical phonons at room temperature (2015, March 2) retrieved 18 August 2019 from https://phys.org/news/2015-03-single-photon-quantum-memory-diamond-optical.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. (Phys.org)—Photonic quantum technologies – including cryptography, enhanced measurement and information processing – face a conundrum: They require single photons, but these are difficult to create, manipulate and measure. At the same time, quantum memories enable these technologies by acting as a photonic buffer. Therefore, an ideal part of the solution would be a single-photon on-demand read/write quantum memory. To date, however, development of a practical single-photon quantum memory has been stymied by (1) the need for high efficiency, (2) the read/write lasers used introducing noise that contaminates the quantum state, and (3) decoherence of the information stored in the memory.center_img The heralded second-order correlation function of the memory output as a function of storage time. Values below the classical limit of g(2)out = 1 demonstrate the quantum characteristics of the output field. Nonclassical statistics are observed for storage times up to ∼3 ps. Error bars are from Poissonian counting statistics. D. G. England, K. A. G. Fisher, J-P. W. MacLean, P. J. Bustard, R. Lausten, K. J. Resch, and B. J. Sussman, Storage and Retrieval of THz-Bandwidth Single Photons Using a Room-Temperature Diamond Quantum Memory, Phys. Rev. Lett. 114, 053602 (2015). Sussman notes that ultrafast lasers were developed to study picosecond and femtosecond dynamics in molecular and bulk phonon vibrations. “It’s therefore not surprising that we’d employ these vibration or similar systems as substrates to operate at ultrafast speeds for quantum processing – and Dr. England was able to leverage his expertise in these two areas to bridge the National Research Council and Institute for Quantum Computing teams and make the project a success.”The paper states that because the quantum memory is low noise, high speed and broadly tunable, it promises to be a versatile light-matter interface for local quantum processing applications. Sussman explains that the interface between light and matter is an important frontier for quantum information science, in that it combines the advantages of photonic qubits (which move fast and have long decoherence times) with those of matter qubits (stationary and with strong interactions). “The diamond memory is an important innovation because it provides a robust and convenient platform on which to investigate this interface,” which he adds are due to its key advantages:• the memory is broadly tunable, and so can be used for many different photon sources• the high speed of the memory allows millions of experiments per second, which is important for synchronous detection of multiple spontaneous quantum events – that is, it is critical for experiments with a low probability of success and where many repeat efforts are required• the memory is low noise – even at room temperature – making it a simple test bed system which does not require any bulky and expensive cryogenic or vacuum apparatusThe system described in the paper has some advantages over previous efforts to implement optical quantum memories, including single atoms in a cavity, ultracold atoms, atomic vapors, molecular gases, and rare-earth doped crystals, and other platforms. “Our system has two interesting features: low noise and high bandwidth. “The noise floor of the memory is principally a measurement of the background introduced by parasitic processes driven the strong read/write pulses,” Sussman explains. “This noise degrades the integrity of the quantum state stored by the memory. Practically speaking, the noise floor is measured by blocking the input photon and measuring what comes out of the memory if nothing is put in. As the intention is to store and retrieve single photons, it’s critical that the noise floor remains a fraction of the single-photon, or the quantum, level.”One important feature of diamond is that optical phase matching requirements suppress parasitic processes. Another factor is that in many systems, it is often necessary to employ cryogenic or laser cooling to isolate a quantum system from environmental noise – but due to the large energy of the diamond optical phonon, the Boltzmann inversion at room temperature is sufficient such that there is no need to cool the diamond. The memory therefore operates with quantum-level noise at room temperature. In addition, he continues, their previous work with Walmsley’s group at Oxford looked at creating entanglement between two different diamonds1. “We continue to build on this diamond platform and have now shown that it is possible to store single photons. The entanglement experiments suggest that it should be possible to store entangled states of light in diamond, which is encouraging for some future research directions.”While, as mentioned, significant work has been put into developing ultrafast spontaneous parametric down-conversion sources compatible with a specific quantum memories, Sussman says that their system takes the opposite approach. “We have a memory with bandwidth larger than that of the photon source. The bandwidth of a stored pulse here is ultimately only limited by the large 40 THz energy of the phonon,” although he acknowledges that in this investigation that it was experimentally limited by their longer duration 2 THz write pulse.Interestingly, when Phys.org asked how advanced acoustic metamaterials such as synthetic phononic crystals might relate to their research, Sussman agreed that modifying the phonon band structure and density of states would be very useful for customizing the memory energy levels and controlling decoherence.In terms of research plans, Sussman says that much research has gone into long coherence time quantum memories for use as a component in long-distance quantum communications. “In a complementary way, there are a number of interesting opportunities where coherence times are shorter but bandwidths are higher. Because the diamond quantum memory can utilize short pulses, a significant number of operational time bins can be performed before the system decoheres. Our next steps will involve storage and generation of more elaborate single-, multi-, and entangled photon states, as well as looking at very interesting opportunities for sensing and color conversion.”Sussman adds that, broadly speaking, the researchers work in three areas: developing optical methods of controlling quantum systems; developing novel quantum systems; and combining these to then develop quantum technology applications. “The state-of-art in laser technology now allows quantum systems to be manipulated with extreme precision, and the implications are that it will be increasingly easy to build quantum technologies that are capable of performing in ways not possible with traditional methods. I think some of the next big steps will be in extending the technologies built for quantum communications to sensing.”For Sussman and his colleagues, the future is ripe with possibility. “The current areas of research where quantum memories are of considerable interest are quantum information processing and communications – but in the future the individual components needed to build these systems will surely find applications beyond these areas. As examples, sensing and imaging will surely be affected by the development of robust quantum components including sources, memories, gates, frequency converters, and detectors that can be combined in new ways. It’s not hard to envision that this will ultimately have impacts in range of important additional applications, including those as varied as astronomy, chemical sensing and medical imaging.” Improved interface for a quantum internet More information: Storage and Retrieval of THz-Bandwidth Single Photons Using a Room-Temperature Diamond Quantum Memory, Physical Review Letters (2015) 114: 053602, doi:10.1103/PhysRevLett.114.053602Related: 1Entangling Macroscopic Diamonds at Room Temperature, Science (2011) 334(6060): 1253-1256, doi:10.1126/science.1211914 Sussman notes that the most difficult technical obstacle was verifying the non-classical photon statistics of the memory output. To determine whether single photons were actually retrieved from quantum memory, the scientists performed a so-called g(2) measurement (the degree of coherence between two fields) in which the output photon was coupled into a 50:50 beam splitter, and detectors placed at both output ports. “Because single photons are indivisible, one would never expect to measure coincident detection in both arms – and this is what we were able to confirm. Nevertheless, experiments aren’t perfect – and where the single photon is even slightly contaminated by background noise, we very occasionally make a coincidence measurement. As a result, measuring enough of these coincidences in order to collect significant statistics required over 150 hours of continuous data acquisition.” He adds that graduate students Kent Fisher and JP MacLean worked tirelessly to perform the experiment.”A quantum memory is a conversion between quantum states of light and matter,” Sussman tells Phys.org. “However, decoherence is constantly destroying the crucial quantum nature of the matter system, and thus the advantages of quantum technologies. Typically the narrow linewidths of the quantum levels involved limit the bandwidth of such memories to the gigahertz range or below. Our challenge was therefore to work with very short pulses of light to beat decoherence – that is, to perform our operations before the system decays. Again, ultrafast Spontaneous Parametric Down-conversion is the most popular source of high purity single photons – but with femtosecond oscillators it produces THz-bandwidth photons that can’t fully be utilized in lower bandwidth systems. We were able to bridge this three orders of magnitude gap between light and matter by building an ultrafast capable quantum memory.”Since all quantum systems suffer from decoherence effects when they interact with an external environment, isolating the quantum system from its environment is a universal problem in quantum technology. “The key insight behind our experiment was that ultrafast lasers can avoid decoherence. Rather than try to isolate our memory from the environment, we address it on timescales that are fast compared to decoherence by using ultrafast laser pulses of ~200 femtoseconds duration.” Journal information: Physical Review Letterslast_img read more

Blue whale fossil provides evidence that baleens grew large earlier than thought

first_img 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. More information: Giovanni Bianucci et al. Rise of the titans: baleen whales became giants earlier than thought, Biology Letters (2019). DOI: 10.1098/rsbl.2019.0175 New whale fossils from Italy and Peru imply an early origin of modern mysticete gigantism. (a) Map of Italy showing the fossil locality of Balaenoptera cf. musculus. (b) Cranium of Balaenoptera cf. musculus, in dorsal view. (c) Right tympanic bulla of B. musculus (National Museum of Nature and Science specimen M25900), in dorsal view (i), and B. cf. musculus in dorsal (ii) and ventrolateral (iii) view. (d) Support surface for the mode shift model from Slater et al.; dark and light grey bars denote the range of the 2- and 3-unit support regions, respectively. (e) Support surface for the mode shift model with B. musculus truncated at 1.37 Ma, but with the Peruvian fossils excluded. (f) Mysticete body length plotted against time, and compared with the 80 (white), 90 (grey) and 95% (black) quantiles of 1000 BM simulations on the baleen whale phylogeny of [4]; grey circles are chaeomysticetes, triangles toothed mysticetes, and red circles the new fossils from Italy and Peru. Note that the BM simulations were carried out on a phylogeny that did not include the specimens described here; their placement relative to the quantiles is thus merely indicative. (d–f) Modified from Slater et al. Photo in (b) by Akhet s.r.l. (akhet.it). Drawing of B. musculus by Carl Buell. Credit: Biology Letters (2019). DOI: 10.1098/rsbl.2019.0175 Citation: Blue whale fossil provides evidence that baleens grew large earlier than thought (2019, May 1) retrieved 18 August 2019 from https://phys.org/news/2019-05-blue-whale-fossil-evidence-baleens.html Explore further Journal information: Biology Letterscenter_img Baleen whales are very large creatures—the biggest of them, the blue whale, is not just the largest animal alive today—it is the largest animal in evolutionary history. Prior research has shown that baleen whales are able to grow so large because they live in the ocean, which allows whales to counter the impact of gravity with buoyancy—and because the evolution of the baleen allowed them to catch and consume a huge amount of food in short order. For many years, there has been some debate among ocean scientists regarding why the whales grew so big and when it happened. In recent years, a general consensus has maintained that they likely grew large rapidly approximately 300,000 years ago—though researchers have suggested that it could have been as far back as 4.5 million years ago. Researchers believe that at some point in time, the climate changed in a way that very strongly impacted krill, the main baleen food source. In order to survive, the whales would have had to eat huge amounts of the tiny sea creatures before swimming a very long way to find another meal. But now, this theory is being challenged by the team studying a blue whale fossil found in Italy.The researchers report that the fossil is that of a blue whale approximately 26 meters in length. Dating shows that the fossil is approximately 1.5 million years old. When the researchers added data from the blue whale to data from other baleen fossils, they came up with a new time scale—they suggest that the large size of the baleen whales occurred about 3.6 million years ago, and maybe even as far back as 6 million years ago. They also suggest that the change in size likely developed gradually. But they also acknowledge that much more work is required to give their theory credence, which will involve finding more ancient whale fossils to study. Genome sequencing shows baleen whales intermingled more than thought © 2019 Science X Network A team of researchers with members from Italy, Australia, and Belgium has found evidence that suggests baleen whales grew large earlier than has been thought. In their paper published in the journal Biology Letters, the group describes their study of a whale fossil that was found in 2006 and how old it was.last_img read more

Sushi noon and Murakami musings

first_imgAll this thanks to an invite I got to attend an international sushi training workshop by Japan External Trade Organisation (JETRO) and Indian Federation of Culinary Associations (IFCA) in association with Sheraton New Delhi as the hospitality partner.  In great company of Master Chefs  Masayoshi Kazato, executive  director, All Japan Sushi Association and Hirotoshi Ogawa -Director  General, All Japan Sushi Association.Let me confess my rather Bong palate had not taken too kindly to raw fish before. But to learn the art of making Sushi, from the very best that too, can make taste buds evolve in an hour’s notice. Also Read – ‘Playing Jojo was emotionally exhausting’What is heartening is like me, a large chunk of Delhi is experimenting with food, any food, and Japanese fare is getting its place under the sun and on the dinner table.Japanese cuisine, on its part, has also evolved over  the  last  few  decades  and it has gained the convolutions  of  western  touch, primordial instincts of Asian flavour, elegance and cadence of modern culinary profile. And Sushi, the very essence of Japanese cuisine, has put up a hard fight with the sorshe illish. Okay, that was bit of a stretch!But why Murakami on my mind. Well, let’s just say it was chefs’ names, the food and all the book talk before and after.last_img read more

Kids develop selfesteem even before age five

first_imgChildren may develop a sense of self-esteem even before they begin kindergarten, reveals an interesting research. “We found that by as young as five years of age, self-esteem is established strongly enough to be measured using sensitive techniques,” said lead study author Dario Cvencek, research scientist at University of Washington.The study conducted in January 2016 used a newly developed test to assess implicit self-esteem in more than 200 children up to five-year-old. “Some scientists consider preschoolers too young to have developed a positive or negative sense about themselves,” study co-author Andrew Meltzoff from University of Washington noted. Until now, no measurement tool has been able to detect self-esteem in preschool-aged children as the existing self-esteem tests require the cognitive or verbal talk. Also Read – ‘Playing Jojo was emotionally exhausting’Researchers created a Preschool Implicit Association Test (PSIAT), to measure how strongly children feel positively about themselves.To make the task appropriate for preschoolers, a mix of 234 boys and girls of five-year-old from the Seattle area, replaced words related to the self with objects. They used small unfamiliar flags, and where told about “yours” and “not yours”. Using buttons on a computer, children responded to a series of “me” and “not me” flags, using words and pressing the buttons. Also Read – Leslie doing new comedy special with NetflixThe results showed that the five-year-old associated themselves more with “good” than with “bad”, and this was equally pronounced in both girls and boys.A gender identity task assessed the children’s sense of whether they are a boy or a girl, called a “gender in-group preference”. Children with high self-esteem and strong sense of gender identity showed preferences for members of their own gender. The study was published in the journal Experimental Social Psychology.last_img read more

Barasat gets first trauma care ambulance two biotoilets

first_imgKolkata: Barasat Municipality in North 24-Parganas has got its first trauma care ambulance that will cater to a large number of people in the district.Barasat MP Kaloli Ghosh Dastidar on Monday inaugurated a trauma care ambulance along with two bio-toilets that will be extremely handy for the civic body to provide better services to the people.The trauma care ambulance which is equipped with all the modern facilities will be stationed at the municipality office. It will not only cater to the people under the jurisdiction of the municipality but also to others living in the adjoining areas. The projects have jointly been funded by the MP and the Barasat Municipality. Also Read – Rain batters Kolkata, cripples normal lifeChampak Das, the Chairman-in-council (Health) of Barasat Municipality said the services would be provided at a subsidised rate so that the people can afford the ambulance service at a low cost. There will be a doctor and two technicians in the ambulance. The newly inaugurated ambulance is fitted with an operation theater and a life support system. The doctor can perform a surgery within the ambulance if it is required while transporting an accident victim to the hospital. “The fare of the trauma care ambulance will be fixed after the chairmen-in-council meeting. People can avail it at a much cheaper rate. The ambulance will provide 24-hours emergency services to the people of Barasat and also from the adjoining areas,” Das said. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedIt may be mentioned here that accidents often take place on National Highway 34 and Jessore Road, both of which pass through the district head quarter at Barasat.In some cases, accident victims are critical and they require a trauma care ambulance for an immediate transportation. The trauma care ambulances of the private hospitals are not always available and they charge people a huge amount of money. Two bio-toilets have been procured by the municipality which would be used during any event. The toilets would also be used for commercial purposes, an official of the civic body said.last_img read more

Facebook obstructs childrens moral development

first_imgOnly 15 per cent of parents thought that popular social media websites such as Facebook provided a positive influence on a young person’s character, said the poll from the Jubilee Centre for Character and Virtues, University of Birmingham.The team of researchers found that 40 per cent of parents were “concerned” or “extremely concerned” about the negative and potentially harmful impact of social media.“There are some surprising findings in the poll, not the least the low level of agreement that social media can enhance or support a young person’s character or moral development,” lead researcher Dr Blaire Morgan said in a university statement. Also Read – ‘Playing Jojo was emotionally exhausting’According to the report, 24 percent of the respondents said forgiveness and self-control were the qualities that were least present in them, followed by honesty (21 per cent), fairness (20 per cent) and humility (18 per cent).“Sixty percent of parents named anger and hostility as the most negative trait displayed, followed by arrogance (51 per cent), ignorance (43 per cent), bad judgment (41 per cent) and hatred (36 per cent),” the report noted.Meanwhile, the top five character strengths promoted at least once a month on social media sites were identified as humour (52 per cent), appreciation of beauty (51 per cent), creativity (44 per cent), love (39 per cent) and courage (39 per cent).last_img read more

Exploring the botanical heritage of India

first_imgShowcasing the specimens and literatures that depict some of the most crucial chapters of botanical history of India and the world, an exhibition entitled the ‘Botanical Heritage of India’ is going to be launched on October 27.Being organised by The Botanical Survey of India (BSI) along with Royal Botanic Gardens, Kew at London and Centre for World Environmental History (CWEH), University of Sussex, exhibition will be held at the gallery of India International Centre, New Delhi. Also Read – Add new books to your shelfIt is based on the theme of Indian Natural History Collections in Botany and Meteorology and aims at helping assemble, reconsider and debate fresh frameworks for botanical and meteorological histories of the Indian Ocean region c.1500- c.2000.It is very clear that no plants in the world are left out without any medicinal value. So, the collection of Bengali manuscripts known as Puthi, on display, is an important pointer to the existence of indigenous knowledge of plants and their medicinal values. Also Read – Over 2 hours screen time daily will make your kids impulsiveInfographs, prepared by Botanical Survey of India and Central National Herbarium, form an important component of the exhibition. These posters would provide a historical background of the discipline of botany through the work of William Roxburgh and Nathaniel Wallich. The commissioned expedition of Joseph Dalton Hooker, and his subsequent publications and work in the Royal Botanical Gardens in Kew, England as its director, was extremely important in organising the classification, preservation and distribution of plant specimens and its accompanying botanical knowledge across the world. This forms the core of the exhibition. The collection comprises of materials brought over from Kew Garden and corresponding artefacts from the archives of Botanical Survey of India. This exhibition also celebrates the life and work of an Indian Botanist Janaki Ammal Edavaleth Kakkat and puts her in her rightful place in the pantheon of botanical heritage of India. This Exhibition offers scholars and the general public in India an opportunity to view and access a rich collection of the Heritage. The exhibition will last till November 7.last_img read more

37th International Trade Fair begins

first_imgBased on the theme of ‘Start-up Standup’, the much awaited 37th India International trade fair (IITF) kick-started on November 14 with a participation of approximately 21 countries and 3000 companies. Ram Nath Kovind, President of India, inaugurated the annual flagship event of India Trade Promotion Organisation (ITPO) at Hamsadhwani Theatre, Pragati Maidan, New Delhi. The ‘business days’ for the mega fair fall from November 14 to 17 whereas for the general public, the fair will be open from November 18 to 27. Also Read – Add new books to your shelfThe 37th IITF has Vietnam as the partner country, the Kyrgyz Republic in Central Asia as the ‘focus country’ and Jharkhand as the partner state.Among the participating countries, Afghanistan, Bahrain, Bangladesh, Bhutan, China, Hong Kong, Indonesia, Iran, Iraq, South Korea, Myanmar, South Africa, Sri Lanka, Thailand, Turkey, Kyrgyz Republic, Netherlands, UAE, UK, and Vietnam are a few names.First lady, Savita Kovind also graced the inauguration ceremony along with Suresh Prabhu, Minister of Commerce and Industry, Government of India, C.R. Choudhary, Minister of State for Commerce and Industry, C.P. Singh, Urban Development Minister, Jharkhand, Samargiul Adamkulova, Ambassador, Kyrgyz Republic, Ton Sinh Thanh, Ambassador, Socialist Republic of Vietnam and L.C. Goyal, Chairman-cum-Managing Director, ITPO. Also Read – Over 2 hours screen time daily will make your kids impulsiveSpeaking on the occasion, Ram Nath Kovind said, “India International Trade Fair 2017 takes place at a point when India is recognized as one of the bright spots of the global economy. The world has acknowledged the changed business environment in the country and the strides made in doing business. The introduction of the Goods and Services Tax (GST) has been a milestone. It has broken down barriers between states.” Complimenting ITPO for the IITF 2017 as well as the ongoing redevelopment plan of Pragati Maidan as International Exhibition-cum-Convention Centre (IECC), the President pointed out that ITPO is consistently delivering IITF as a world-class event and IECC is one that is suited to India’s stature as a rising economy. He evinced keen interest to visit the complex when it would be set up by the year 2019. He expressed his happiness over the participation of Vietnam as a ‘Partner Country’ and Kyrgyzstan as the ‘Focus Country’ in the fair. He also reiterated that Vietnam, a valued friend and a member of ASEAN is a pillar of India’s ‘Act East Policy’ while, the Kyrgyz Republic is part of Central Asia, a region that is one of India’s oldest trading destinations. Kyrgyz-India trade is diverse and ranges from pharmaceutical drugs to commodities. The scope for growth is immense. In his keynote address, Suresh Prabhu commended ITPO for continuing the legacy of fairs including IITF, especially when redevelopment of Pragati Maidan is underways. The Minister informed that holding this edition of the fair with improved logistics, Ministry of Commerce and Industry is making all possible efforts to provide a conducive environment for the empowerment of India’s business community. Tickets for ‘business days’ visit to the India International Trade Fair (IITF) are available at 42 Delhi Metro stations including Dilshad Garden, Rithala, ITO, Delhi Gate, Jama Masjid, Janpath, Lajpat Nagar, Govind Puri, Badarpur, Escorts Mujesar, New Delhi, Dhaula Kuan, Sikanderpur, Huda City Centre and Noida City Centre, across all corridors. Business visitor registration counters are at Gate No. 1 (of Pragati Maidan) and a ticket is priced at Rs 500.”For the general public, tickets will be sold from November 18 at the metro stations. The entry tickets for the general public, however, would be available at all stations, including on the Airport Express Line, except the Pragati Maidan Metro Station,” the DMRC said. From November 18, the fair will be open to all visitors with a ticket price of Rs 60 for adults and Rs 40 for children. However, on Saturday and Sunday as well as any holiday between November 18-27, the ticket price for adults will be Rs 120 and Rs 60 for children.last_img read more

Police nab man with heroin worth Rs 2L

first_imgKolkata: The narcotics cell under Detective Department (DD) of Kolkata Police has nabbed a person with heroin worth Rs 2 lakh from in front of the police morgue located behind the Calcutta Medical College and Hospital (CMCH)The man has been identified as Arvind Singh. According to a source, police officers recently got a tip-off that the heroin smuggler was operating in and around Sealdah-College Street area. Based on the information, police officers came to know that Singh sold heroin to school and college students in the city through a few local drug peddlers. Also Read – Bose & Gandhi: More similar than apart, says Sugata BoseDetective Department personnel came to know that the area behind the medical college and hospital has turned into a hub of drug addicts since the past few days. During investigation, sleuths came to know that Singh operated from the area. Police officers immediately started search operations to nab Singh at his residential area in Girish Park but were not able to locate him. On Wednesday evening, a source of police informed that Singh has been seen around CMCH. Immediately, a team from DD raided the spot in front of the police morgue behind CMCH and arrested Singh. Sleuths have also seized 275 grams of heroin from him which he intended to hand over to some drug peddlers who allegedly did not come. Also Read – Rs 13,000 crore investment to provide 2 lakh jobs: MamataAccording to the police, the increase in drug addiction in students has become a major issue since the past few months. Recently several drug dealers and drug peddlers have been arrested, who sold ganja, heroin and other drugs to school and college students. To curb the menace, police are mulling to get in touch with school and college authorities and make an initiative to conduct counselling sessions for students to prevent them from getting addicted to drugs. On March 14, police officers had arrested two persons and seized 4kg ganja. Sleuths came to know that drug peddlers were trying to sell ganja to students of various schools and colleges. Three more were arrested with other drugs from multiple locations. They also sold drugs to students. Singh’s name cropped up during investigation in these cases.last_img read more