Professor proposes theory of unparticle physics

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. Howard Georgi, a physicist at Harvard University, has recently published a paper on so-called unparticle physics, which suggests the existence of “unparticle stuff” that cannot be accounted for by the standard model. Appearing in a recent edition of Physical Review Letters, the paper says that unparticle stuff would be very different than anything seen before. “If all of the stuff that is scale-invariant couples to all the stuff that isn’t in a way that gets weaker and weaker as the energy gets lower, then it could be that, at the energies we can probe today, we just don’t see the unparticle stuff at all,” Georgi explained. “There could be a scale-invariant world separate from our own that is hidden from us at low energies because its interactions with us are so weak.”These particle interactions would appear to have missing energy and momentum distributions. Georgi has calculated the peculiar distributions of missing energy for the decay of a top quark, which would signify the production of unparticle stuff. “The very confusing question of ‘What does unparticle suff look like?’ gets replaced by a simpler question: ‘How does unparticle stuff begin to show up as the energy of our experiments is increased?’” he said.He explained that a good way of understanding unparticle stuff is with neutrinos. Neutrinos have some properties in common with unparticle stuff. For example, neutrinos are nearly massless and therefore nearly scale invariant. They couple very weakly to ordinary matter at low energies, and the effect of the coupling increases as the energy increases. “Very often, in a scattering experiment, we can infer the existence of neutrinos by adding up the energy and momentum of the colliding particles and subtracting the energy and momentum of all the particles we can see to get the energy and momentum of the ‘missing’ (which just means that we don’t see them because they escape our detectors without interacting) neutrinos,” he said. “By doing the scattering many times, we can measure a probability distribution for the missing energy and momentum. And by looking at the distribution, we can tell whether there is one or two or more neutrinos missing in the particular process we are studying. “An interesting result of my analysis is that such a distribution for a process that produces unparticles looks like the distribution for a fractional number of massless particles,” he added. “This is weird, but it follows very simply from the scale invariance of the unparticles. It is the first glimmer of an answer to the question of how unparticles begin to show up.”Because the signatures of unparticle stuff would be very distinct, LHC experiments have the potential to verify the existence of unparticle stuff immediately. Georgi says that, in his opinion, unparticle stuff would be a more striking discovery than supersymmetry or extra dimensions, both of which point to just more new particles. Unparticle stuff, on the other hand, would be a different concept altogether. “I, and a number of other researchers, am now trying to push these ideas harder,” Georgi said. “Other weird properties of unparticles have already emerged. I expect more. It is great fun. Of course, it would be even greater fun if we actually saw stuff like this at the LHC. But even if we don’t, I believe that analyses like this are useful because they can shake us out of preconceptions that could cause us to miss important physics as the energy of our machines grows.”Citation: Georgi, Howard. “Unparticle Physics.” Physical Review Letters 98, 221601 (2007).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. Explore further Georgi, a highly regarded physicist well-known for his pioneering work in areas including supersymmetry, quantum chromodynamics, and grand unified theories, explains that the low-energy physics of nontrivial scale-invariance cannot be described in terms of particles. In this initial investigation of the idea, he gives a quantitative scenario of the production of unparticle stuff, and predicts how it could be experimentally detected in the upcoming Large Hadron Collider (LHC), the most powerful particle accelerator that will open in early 2008.In scale-invariant theory—where objects don’t change when their dimensional qualities are multiplied by a rescaling parameter—the concept of particles doesn’t work because most particles have a definite nonzero mass. In quantum mechanics, this isn’t a problem because the standard model does not have scale-invariance. But Georgi suggests that there could be an undiscovered sector of the standard model that is exactly scale-invariant.“I have been having a lot of fun with this,” Georgi told PhysOrg.com. “It is a phenomenon that has been understood mathematically for a long time, in the sense that we know of theories that have the peculiar property of scale-invariance. It is hard to describe this because it is so different from what we are used to. For us it makes a big difference whether we measure masses in grams or kilograms. But in a scale-invariant world, it makes no difference at all.”Georgi explains that photons, which are particles of light, have the property of scale invariance because they have zero mass. Multiplying all the photon energies by a factor of 1000 would make them look exactly the same. “Clever theorists (like Ken Wilson) showed long ago that there were crazier possibilities which do not involve particles with zero mass, but still have the property that energies can be multiplied by any factor to give a physically equivalent theory,” Georgi said. “[But] this is impossible if there are particles with any definite nonzero mass. That is why I called this ‘unparticle’ stuff.”This scale-invariant sector would interact very weakly with the rest of the standard model, making it possible to observe evidence for unparticle stuff, if it exists. The unparticle theory is a high-energy theory that contains both standard model fields and “Banks-Zaks” fields (which has scale-invariance at an infrared point). The two fields can interact through the interactions of ordinary particles under high enough machine energy or a low enough mass scale. center_img Citation: Professor proposes theory of unparticle physics (2007, June 11) retrieved 18 August 2019 from https://phys.org/news/2007-06-professor-theory-unparticle-physics.html Unparticles may provide a new path to superconductivity Unparticles, but not particles, can fit in a theory that has the property of continuous scale-invariance, which is difficult to visualize. A fractal, like this Koch Curve, is an example of discrete scale-invariance because it looks the same if multiplied by a fixed number. Credit: Benoit Mandelbrot, Fractals.last_img read more

Startup company aims to harness the full potential of producing electricity from

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. (PhysOrg.com) — Matt Scullin co-founded Alphabet Energy just one year ago, but already the CEO has ambitions of turning the San Francisco-based start-up company into the “Intel of waste heat.” By harnessing the waste heat emitted by power plants, industrial furnaces, and cars, Alphabet Energy envisions that it could provide inexpensive electricity to the US grid by recycling waste heat on a much larger scale than currently exists. More information: Alphabet Energyvia: National Geographic Explore further Citation: Start-up company aims to harness the full potential of producing electricity from waste heat (2010, September 2) retrieved 18 August 2019 from https://phys.org/news/2010-09-start-up-company-aims-harness-full.html © 2010 PhysOrg.com Currently, more than two-thirds of the fuel used to generate power in the United States is lost as heat, according to a 2008 report from the Oak Ridge National Laboratory. The goal of cogeneration technology is to convert this waste heat into electric and thermal power. Although the idea has been around for more than a century, the US produces only about 9% of its power from cogeneration systems. In comparison, many European countries use cogeneration systems for a significantly larger portion of their electricity production, with Denmark producing more than 50% of its power using waste heat recovery systems. In the US, the Department of Energy has a goal for recycled waste heat to account for 20% of US electricity production by 2030.Alphabet Energy’s strength lies in its recent development of a thermoelectric chip that can be inserted into a wide variety of exhaust flues, engines, or other heat-producing devices to convert the waste heat into electricity. As heat essentially pushes electrons through the material, the device can be connected to the grid to feed in the electricity in real time. As the company explains, the device’s key advantage is the novel material – a relatively abundant, low-cost material that has been modified by researchers at the Lawrence Berkeley National Laboratory to lower its thermal conductivity and increase its electricity output using a smaller amount of heat. Another advantage is that the thermoelectric chip is produced using similar methods used for producing the microchips used in electronic devices, which should lower production costs.These improvements may allow Alphabet Energy to lower the cost of installing the system to less than half that of current systems, to under $1 per watt. At this cost, and depending on the properties of the heat generation system, the system could deliver a payback time of two to four years. In addition, since electricity generated from waste heat is 100% clean energy, Alphabet estimates that its technology will be able to offset more than 500 million tonnes of carbon annually.Alphabet Energy plans on performing a pilot test at an industrial facility next year, and may start commercialization in 2012. One of the challenges the company faces is that waste heat is one of the few power sources that the US government does not currently subsidize. However, recently a bipartisan group of lawmakers led by Democratic Representative Paul Tonko of New York have introduced a bill that would offer a 30% tax credit for installing waste heat recovery systems in industrial environments. Alphabet Energy estimates that the technology for waste heat recovery systems could comprise a $200 billion global market. Other US companies are also working on waste heat recovery techniques, from small start-ups to corporations including General Motors and General Electric. Besides heat from factories and power plants, future systems could also harness the heat from laptop computers and cell phones, although that technology is still in development. A greener way to power cars A coal power plant in Datteln, Germany, that transforms chemical energy into 36%-48% electricity and the remaining 52%-64% into waste heat. Image credit: Arnold Paul. Wikimedia Commons.last_img read more

Linux and Intel 386 processors will part ways

first_img “This tree removes ancient 386 CPU support and thus zaps quite a bit of complexity, which has plagued us with extra work whenever we wanted to change SMP primitives, for years,” Molnar wrote in a message to Linux kernel creator Torvalds. He spoke of the “nostalgic cost being that “your old original 386 DX33 system from early 1991 won’t be able to boot modern Linux kernels anymore.” Torvalds replied, I’m not sentimental. Good riddance.”Intel’s 32-bit 386 processor was first introduced in 1985 and production continued until 2007. In May 2006, Intel announced that 80386 production would stop at the end of September 2007. The Linux kernel was released in 1991 and was eventually ported to a number of computer hardware platforms. The general reaction among technology bloggers is that Torvalds’ decision to make the 386 processors history for Linux is not expected to bother most Linux users except for those who choose to still build on very old rigs. As for Linux moving forward, Linux 3.7 was launched on December 10. Torvalds wrote”It’s been a somewhat drawn out release despite the 3.7 merge window having otherwise appeared pretty straightforward, and none of the rc’s were all that big either. But we’re done, and this means that the merge window will close on Christmas eve.Or rather, I’ll probably close it a couple of days early. For obvious reasons. It’s the main commercial holiday of the year, after all.”Part of the news about this release is support for the ARM 64-bit architecture, with ARM support to boot into different systems using the same kernel, which translates into portability across different hardware setups. There is also support for the Intel “supervisor mode access prevention” (SMAP) security feature. The release carries new drivers and fixes too. Citation: Linux and Intel 386 processors will part ways (2012, December 14) retrieved 18 August 2019 from https://phys.org/news/2012-12-linux-intel-processors-ways.html Explore further Ubuntu 7.04 to Arrive April 19 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)—Earlier this week Linus Torvalds took away support for 386 CPUs from the Linux kernel. He agreed with the position of Red Hat engineer and Linux kernel developer Ingo Molnar to drop support for Intel’s old 386 microprocessors. For Linux users, the world is not coming to a halt. All it means is that the 386 DX33 chip will not be able to run in future versions of Linux, just in existing versions of the kernel. Intel 386-DX owners, for whatever hobbyist or other reasons, will not be able to enjoy the new Linux versions starting with 3.8. Molnár explained that the extra work involved in continuing support was greater than the returns in benefits. © 2012 Phys.orglast_img read more

Researchers discover nanoparticles can be fabricated using Leidenfrost drops w Video

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. Journal information: Nature Communications French team demonstrates paramagnetic properties of liquid oxygen drops (Phys.org) —A team of researchers from several research institutions in Germany has found that certain types of nanoparticles can be created using levitated drops of heated water—Leidenfrost drops. In their paper published in the journal Nature Communications, the team describes how they created metal polymer hybrid foams and other nanoparticles using nothing more than water on a heated substrate. Play Gold nanoparticles synthesis in the Leidenfrost drop reactor: Transformation of Leidenfrost drop from yellow gold salts to plasmonic red colour of gold nanoparticles during the levitation. Credit: Nature Communications 4, Article number: 2400 doi:10.1038/ncomms3400 PausePlay% buffered00:0000:00UnmuteMuteDisable captionsEnable captionsSettingsCaptionsDisabledQuality0SpeedNormalCaptionsGo back to previous menuQualityGo back to previous menuSpeedGo back to previous menu0.5×0.75×Normal1.25×1.5×1.75×2×Exit fullscreenEnter fullscreen Play 3D synthesis and coating in the Leidenfrost drop: 3D coating of TEM grid. A rotary motion of Leidenfrost drop holds the TEM grid inside the drop during the coating. Credit: Nature Communications 4, Article number: 2400 doi:10.1038/ncomms3400 PausePlay% buffered00:0000:00UnmuteMuteDisable captionsEnable captionsSettingsCaptionsDisabledQuality0SpeedNormalCaptionsGo back to previous menuQualityGo back to previous menuSpeedGo back to previous menu0.5×0.75×Normal1.25×1.5×1.75×2×Exit fullscreenEnter fullscreencenter_img © 2013 Phys.org Plasmonic gold nanoparticles using a levitating drop reactor. Credit: Nature Communications 4, Article number: 2400 doi:10.1038/ncomms3400 Citation: Researchers discover nanoparticles can be fabricated using Leidenfrost drops (w/ Video) (2013, October 31) retrieved 18 August 2019 from https://phys.org/news/2013-10-nanoparticles-fabricated-leidenfrost-video.html Most everyone has seen Leidenfrost drops in action, they occur when dumping a small amount of water into an already heated pan—the drops that form slide around as if there is no friction due to the steam that builds up beneath them. In this new effort, the researchers noted that not only does water turn to steam in Leidenfrost drops but it appears that positive ions gather in that steam leaving negative ions to collect in the liquid above. If melted metal is added to the mix, its positive ions are attracted to the negative ions in the liquid where they react and solidify into certain types of nanoparticles.Using this technique the team found they were able to create nanoporous black gold as well as different types of nanoparticle based foams and also nanoparticle coatings that adhere to a three-dimensional substrate—all without using any toxic chemicals. Researchers have been searching for a way to create such materials in new ways that don’t result in toxic byproducts. Conventional methods rely on the use of a variety of toxic chemicals to cause the desired reactions to come about. That in turn leads to environmental problems as well as concern about the toxicity of the nanomaterials themselves. The process using Leidenfrost drops, on the other hand, is as clean as it gets, the researchers report, with no need for reducing agents—the reactions occur in the heated drops without any other mixing either—leading the researchers to describe the technique as “green chemistry.” The end result is a much cleaner way to make nanoparticles, which is good news as scientists have been discovering new uses for them in a large variety of products. The researchers believe the nanoparticles they have created thus far might one day be used in medical or electrical components. Explore further More information: Green chemistry and nanofabrication in a levitated Leidenfrost drop, Nature Communications 4, Article number: 2400 DOI: 10.1038/ncomms3400AbstractGreen nanotechnology focuses on the development of new and sustainable methods of creating nanoparticles, their localized assembly and integration into useful systems and devices in a cost-effective, simple and eco-friendly manner. Here we present our experimental findings on the use of the Leidenfrost drop as an overheated and charged green chemical reactor. Employing a droplet of aqueous solution on hot substrates, this method is capable of fabricating nanoparticles, creating nanoscale coatings on complex objects and designing porous metal in suspension and foam form, all in a levitated Leidenfrost drop. As examples of the potential applications of the Leidenfrost drop, fabrication of nanoporous black gold as a plasmonic wideband superabsorber, and synthesis of superhydrophilic and thermal resistive metal–polymer hybrid foams are demonstrated. We believe that the presented nanofabrication method may be a promising strategy towards the sustainable production of functional nanomaterials.last_img read more

Researchers create stable goldIII catalysts via oxidative addition of a carbon–carbon bond

first_img More information: Stable gold(III) catalysts by oxidative addition of a carbon–carbon bond, Nature 517, 449–454 (22 January 2015) DOI: 10.1038/nature14104AbstractLow-valent late transition-metal catalysis has become indispensable to chemical synthesis, but homogeneous high-valent transition-metal catalysis is underdeveloped, mainly owing to the reactivity of high-valent transition-metal complexes and the challenges associated with synthesizing them. Here we report a carbon–carbon bond cleavage at ambient conditions by a Au(I) complex that generates a stable Au(III) cationic complex. In contrast to the well-established soft and carbophilic Au(I) catalyst, this Au(III) complex exhibits hard, oxophilic Lewis acidity. For example, we observed catalytic activation of α,β-unsaturated aldehydes towards selective conjugate additions as well as activation of an unsaturated aldehyde-allene for a [2 + 2] cycloaddition reaction. The origin of the regioselectivity and catalytic activity was elucidated by X-ray crystallographic analysis of an isolated Au(III)-activated cinnamaldehyde intermediate. The concepts revealed suggest a strategy for accessing high-valent transition-metal catalysis from readily available precursors. 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. As Kourra and Cramer note, a major challenge for chemists in the organic field is to synthesize structurally complex target molecules selectively, allowing for the development of pharmaceuticals and other valuable materials. One way to do so is via catalysis, which has proven successful in a number of ways. There still remains one area that has met with little success, however, catalysis with transition metals which exist in high oxidation states—Au(III) is one. In this new effort, the researchers have found a way to overcome the two main obstacles (poor stability and the difficulty of getting to the oxidation state via so-called “mild” techniques) researchers have faced in the past.The team’s technique consisted of inserting an existing Au(I) catalyst (biphenylene) into a carbon-carbon bond, without using any strong oxidants. The results was an Au(III) catalyst which had a biphenylene ligand. They note that the reaction occurred at room temperature, making the process relatively simple and inexpensive. Next, the group converted their catalyst into a precursor (stable) compound for storage until a reaction is needed. The researchers then put the ligand to good use—to guide oxygen atoms on substrates into groups that would bind to the metal, offering in effect, a protective shield of sorts against complementary reactions.The researchers tested their catalyst in six different types of reactions and report good product yields, which meant that their technique represents a major breakthrough in the field. They noted also that it opens the door to using Au(I) and Au(III) together, offering the benefits of both, which had not been done before. They next plan see how well their technique works with other compounds. Citation: Researchers create stable gold(III) catalysts via oxidative addition of a carbon–carbon bond (2015, January 22) retrieved 18 August 2019 from https://phys.org/news/2015-01-stable-goldiii-catalysts-oxidative-addition.html Explore further Transformations of diazo compounds catalyzed by environmentally benign iron complexescenter_img (Phys.org)—A team of researchers working at the University of California, has found a way to create stable gold(III) catalysts using oxidative addition of a carbon–carbon bond. In their paper published in the journal Nature, the team describe how they developed a technique that allowed for a carbon–carbon bond split at room temperature by an Au(I) complex that generated a stable Au(III) cationic complex. Christopher Kourra and Nicolai Cramer with École Polytechnique Fédérale de Lausanne offer a News & Views piece in the same journal issue describing the work by the team at UC. Journal information: Nature © 2015 Phys.org Routes to high-valent metal complexes. Credit: Nature 517, 449–454 (22 January 2015) doi:10.1038/nature14104last_img read more

Best of Last Week – Dark matter maybe not so dark chance

first_img Also disappointingly, a team at NASA’s WISE orbiting observatory conducted a search for advanced civilizations beyond Earth and found nothing obvious in 100,000 galaxies. There was also an update by the researchers trying to figure out what the two bright spots are on “Dwarf planet” Ceres—they report it is a giant mystery—the two spots were originally assumed to be similar, but new evidence from NASA’s Dawn space probe showed one is colder than the surrounding surface, but the other is not. They are also wondering why there are so few craters on the surface.In other news, a team of scientists developed a mesh that captures oil—but lets water through—a possible new tool for cleaning up oil spills in the future. Another team of researchers announced they had created a world-record electric motor for aircraft—it’s small, yet delivers a reported five times more power than comparable drive systems. Also a team in Senegal reported that they had observed chimps fashioning spears for hunting—the first observation of a species other than man using tools to hunt large animals. A team of researchers at the University of California also reported that brain development suffers from lack of fish oil fatty acids—in developing frogs. There was also news from the team working on The Green Brain Project—they used a bee brain simulation to pilot a drone.And finally, for those people who take statins to reduce their chances of heart attack or stroke, a new study conducted in Finland has found that the drugs also increase the risk of developing diabetes by 46%—patients will apparently have to decide for themselves whether they are worth the risk. 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. © 2015 Phys.org Explore further Potential signs of ‘interacting’ dark matter suggest it is not completely dark after allcenter_img A false-color image of the mid-infrared emission from the Great Galaxy in Andromeda, as seen by Nasa’s WISE space telescope. The orange color represents emission from the heat of stars forming in the galaxy’s spiral arms. The G-HAT team used images such as these to search 100,000 nearby galaxies for unusually large amounts of this mid-infrared emission that might arise from alien civilizations. Credit: NASA/JPL-Caltech/WISE Team Citation: Best of Last Week – Dark matter maybe not so dark, chance of asteroid strike and statins increasing diabetes risk (2015, April 20) retrieved 18 August 2019 from https://phys.org/news/2015-04-week-dark-chance-asteroid-statins.html (Phys.org)—It was an interesting week for physics as a multinational team of researchers found potential signs of “interacting” dark matter that suggested the mysterious material is not completely dark after all—observations of a group of four galaxies colliding indicated one dark matter clump that appeared to be lagging behind the others, suggesting something other than gravity was at work. In other news from space, astronomers (and many others) wondered if asteroid 2012 TC4 will hit the Earth in October 2017—it came close enough back in 2012 to make a strike a possibility the next time around.last_img read more

Study shows increase in concurrent droughts and heat waves in US

first_img Explore further New index measures the magnitude of heat waves 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. Long heat waves can not only cause damage to crops, they can cause cooling bills to skyrocket stressing budgets and sometimes leading to area wide economic problems. When combined with droughts, as the researchers note, they can lead to significant damage to both society and the environment. As the research pair also note, the second period of time they looked at occurred during what has been called a hiatus of rising global temperatures (which some have suggested is due to heat being sequestered in the oceans) a period when they were not able to spot any increase in frequency of droughts or heat waves—but they were able to see very clearly that the frequency of droughts coinciding with heat waves increased dramatically. They noted also that the greatest increases were associated with the longest and most severe heat waves.To come to these conclusions, the researchers studied heat and drought records over the past half century and then assigned certain definitions to conditions to allow for conducting a statistical analysis—a drought for example, was defined as a period of time during which the likelihood of precipitation was approximately 80 percent below the median precipitation level for a given area for a given time. Their analysis shows that most parts of the country experienced more concurrent droughts, but they were most prominent in the South, South West and some of the West. Notably, the reverse was found to be true for some parts of the Midwest and Northern parts of the country.The researchers conclude by suggesting their study and others like it may help officials, farmers and other people better plan for future meteorological events, perhaps helping to mitigate the damage that is caused by long concurrent heat wave and drought events. More information: Substantial increase in concurrent droughts and heatwaves in the United States www.pnas.org/cgi/doi/10.1073/pnas.1422945112AbstractA combination of climate events (e.g., low precipitation and high temperatures) may cause a significant impact on the ecosystem and society, although individual events involved may not be severe extremes themselves. Analyzing historical changes in concurrent climate extremes is critical to preparing for and mitigating the negative effects of climatic change and variability. This study focuses on the changes in concurrences of heatwaves and meteorological droughts from 1960 to 2010. Despite an apparent hiatus in rising temperature and no significant trend in droughts, we show a substantial increase in concurrent droughts and heatwaves across most parts of the United States, and a statistically significant shift in the distribution of concurrent extremes. Although commonly used trend analysis methods do not show any trend in concurrent droughts and heatwaves, a unique statistical approach discussed in this study exhibits a statistically significant change in the distribution of the data.Press release © 2015 Phys.orgcenter_img Heatwaves place substantial stress on natural and man-made environments. The impact is exacerbated when heatwaves and droughts occur simultaneously. Credit: Jennie Brewton (University of California, Irvine, CA). Citation: Study shows increase in concurrent droughts and heat waves in US (2015, September 1) retrieved 18 August 2019 from https://phys.org/news/2015-09-concurrent-droughts.html Journal information: Proceedings of the National Academy of Sciences (Phys.org)—A pair of researchers with the University of California has found that heat waves and droughts overlapping occurred more frequently during a twenty year span between 1990 and 2010 than occurred during the twenty year span 1960 to 1980. In their paper published in Proceedings of the National Academy of Sciences, Omid Mazdiyasni and Amir AghaKouchak describe their study and suggest their results indicate a statistically significant shift in concurrent extremes.last_img read more

Selfhealing catalysts make it easier to store solar energy with water

first_img(Phys.org)—Currently one of the most efficient ways to store solar energy is to transfer the energy to catalysts that split water into hydrogen and oxygen. Then the hydrogen can either be used as a fuel or later recombined with oxygen to produce water and release electricity when needed. Explore further However, one of the problems with using water to store solar energy is that the catalysts are made of earth-abundant elements (such as manganese, cobalt, and nickel) that corrode in water with a neutral pH. To address this problem, researchers have designed self-healing catalysts that can regenerate themselves in the presence of other elements, such as negatively charged phosphate or borate ions. One of the remarkable features of the self-healing catalysts is that, as long as they are operating, there is no limit to the number of times that they can heal themselves.Now in a new paper published in the Proceedings of the National Academy of Sciences, two of the researchers who have developed the self-healing catalyst, Cyrille Costentin at Paris Diderot University and Daniel G. Nocera at Harvard University, have investigated how this process works at a more detailed level.”This paper provides a quantitative model for self-healing,” Nocera told Phys.org. “It actually extends beyond energy and provides a roadmap for the design of any self-healing catalyst. The rule set is self-assembly and catalysis. If the energy input for operation of the catalyst is greater than that for self-assembly, then the catalyst should be self-healing. So the principles developed in this paper are general.”As the researchers show in their work, a catalyst can self-heal if the self-healing process requires less energy than that needed for normal catalyst operation. A simple way to control the self-healing process is to adjust the pH of the solution, since the amount of energy required for these two processes depends on the pH. The researchers show that there is a critical pH “zone of self-healing” that depends on various factors, in particular the geometry of the water-splitting cell and the phosphate or borate buffer concentration. Fortunately for practical applications, the researchers show that self-healing can occur over a wide range of pH values, including at a neutral pH for typical cell geometries and buffer concentrations, which allows for most natural water sources to be used to store solar energy. Since much of the future demand for renewable energy is expected to come from low-income, developing countries, the ability to use local natural water sources instead of pure water for storing solar energy will offer a big advantage for implementing the technology cost-effectively and on a large scale. The researchers plan to work toward this goal in the future.”The next stage is prototyping,” Nocera said. “We are using this catalyst in conjunction with CO2 and N2 fixing bacteria (papers from our group in Science in 2016 and PNAS in 2017) to make liquid fuels and fertilizer, renewably (using only air, water, and sunlight as inputs). These prototypes are currently being developed in India at this time.” , Science More information: Cyrille Costentin and Daniel G. Nocera. “Self-healing catalysis in water.” Proceedings of the National Academy of Sciences. DOI: 10.1073/pnas.1711836114 Scientists produce robust catalyst to split water into hydrogen, oxygen Citation: Self-healing catalysts make it easier to store solar energy with water (2017, September 19) retrieved 18 August 2019 from https://phys.org/news/2017-09-self-healing-catalysts-easier-solar-energy.html The self-assembly pathway used for self-healing catalysts. Credit: Costentin et al. ©2017 PNAS © 2017 Phys.org Journal information: Proceedings of the National Academy of Sciences 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

Meet Vikram Seth the artist

Art is a natural extension of novelist-poet Vikram Seth’s literature. The writer says he likes to paint­­­— both in words and colours — to create organic shapes with distinct calligraphic identities and poetic sensibilities.The author of A Suitable Boy, who went public with his mastery over the intricate art of Chinese, Arabic and Devnagari calligraphy in his anthology of poetry, The Rivered Earth last year, unveiled three word paintings for Absolut Vodka’s creative art brand in the capital.The acrylic paintings with multi-dimensional surface textures in basic earth colours of orange, green, blue, gold and black, were conceived around the impressionist motifs of Absolut Vodka bottles framed by calligraphy for a new-media text-art effect. Below each canvas were etched two lines of Seth’s poetry to capture the essence of the visuals.‘I have studied Chinese calligraphy for 15 years from my master Zhao Yizhou. When I was in China [early in his career], I used to write calligraphy with a ball pen. That is how it happened,’ Seth recalled during the unveiling of his paintings.Green is the theme of Seth’s Pyasa Pyala [The Thirsty Cup] that takes off on Harivansh Rai Bachchan’s Madhushala in Devnagari calligraphy. ‘The canvas represents the shringar rasa [love],’ the writer said.The third canvas, Na Main, Na Mai in Urdu and Nastaleeq script, painted in a palette of blue and gold, is ‘shanta [peace] rasa’.‘In Blue and Gold, I watch the evening sky/Darken, till neither remains nor I,’ Seth says of the canvas in a rush of nostalgia. It was Arab Spring when Seth was painting the canvas and his teacher, Nasser Mansour in Jordan, had to vet the writer’s calligraphy before he decided to exhibit it, the author recalled.The writer shifted home to England after buying a country home, the old Rectory in Salisbury owned by maverick 17th century metaphysical poet George Herbert, in 2003.Currently the writer is waiting for A Suitable Girl [sequel to A Suitable Boy] to emerge ‘as and when she chooses to’. read more

Welcome the faithful

first_imgSharadotsav, a three-day Maha Raas Leela festival is being organised in the Capital that opens on 6 October. The festival presents the Nritya Natika – in Kathak and Brindaban Braj Raas style on the auspicious occasion of Sharad Purnima.This venture is based on 10th chapter of Shrimad Bhagwad Gita and inspired Late Kamla Devi Chattopadhyay. The production is the culmination of extensive research and authentic imbibing of the Brindaban Braj Raas under expert gurus in the art. It’s been 37 years this dance ballet came into being. Uma Sharma, the renowned Kathak exponent has done pioneering research work on the Raas dance and drama of Brindaban. Over a decade ago she studied the technique under the guidance of Pt Ladli Sharan Sharma the octogenarian authority on the style. She has now evolved a fine blend of Kathak and Raas Leela for her annual presentation of Maha Raas at Sharad Utsav.last_img read more

Gandhi redux

first_imgHaku Shah dedicates his latest exhibition Living Reliving Gandhi to his life-long icon, Mahatma Gandhi. With a blend of abstract and figurative paintings Shah’s work has the potential to portray the Gandhian era in correct form. He has been an active votary of Gandhi for all of his professional life. Shah says, “I paint with the passion and discipline of a true believer. Not a believer in any dogma or rigid religion, but in human endeavor, dignity and grace.” Also Read – ‘Playing Jojo was emotionally exhausting’In this age of contrived conceptualism Shah’s art may seem simple; bereft of the post-modernist impulse and devoid of multi-media contrivances. His painterly language is direct and expressionist in its application of paint and construction of form. Deftly handled paint applied in impasto by palette knives and spatula rather than brushes make his paintings probably close to the work of the many the craftsmen and potters he has studied so closely. This technique imparts an earthy immediacy to his forms and a rustic texture to his surfaces that suits his subject matter.  The line portrait of Gandhiji spinning the charkha in monochrome is so fluid as to seem alive with movement. The landscape depicting the Sabarmati Ashram with the river flowing between it and the burning ghats on the foreground is another engrossing work. The painting of an emerald green forest with the three mythical monkeys that stays in the mind’s eye for its wisdom, humour and lyricism is also on display. Also Read – Leslie doing new comedy special with NetflixHaku Shah was a student of the Faculty of Fine Arts at the MS University. However, more than any institutional learning, it has been his deep and abiding study of the folk and tribal artists, potters, weavers and craft persons that has shaped Haku Shah’s life and world-view.Where: Art Konsult, Lado SaraiWhen: On till February 5Timings: 11 am till 7 pmlast_img read more

Minister enters Kaziranga with firearm

first_imgMunda, accompanied by top forest officials, went to the park on Friday at around 10 pm and was surrounded by forest guards besides his personal bodyguards provided by Assam Police. This action of the minister drew flak from conservationists and wildlife lovers. Wildlife NGO Natures Beckon condemned the incident, saying the minister has not only failed to protect the rhinos but also failed to respect the provisions of the Wildlife Protection Act.“The minister’s move to enter the park with a firearm is a kind of political gimmick to impress people and cover-up their (the government’s) failures,” said Soumyadeep Datta of Natures Beckon. He said the act clearly stated that except forest officials and guards, no one can enter wildlife sanctuaries or national parks with a firearm. The minister’s sudden visit to the park came after poachers on Thursday night killed a female rhino at the Kohora range of the park and took away its horn. Park director MK Yadav, however, said the minister did not violate the wildlife act by entering the park with a firearm. “I cannot comment on my superior. There is no violation of any act.” The forest minister could not be contacted for comment.last_img read more

Mouthful of happiness

first_imgKnown for its rich Mughal history, Old Delhi or Dilli-6 as they call it, never  disappoints when it comes to food. The symbolic heart of Delhi has a variety of  options to explore, be it Fatehpuri Masjid, Chandni Chowk, Sisganj Gurudwara,  Ghalib Ki Haveli, Jama Masjid or the popular Karim’s, each part of Old Delhi  represents a mesmerising blend of culture and traditions. It is that time of the year  again when the rich festive delicacies adorn the Dastarkhan of the Roze-daar. The  Holy month of Ramzan got underway this Friday and the Walled City is most magical during the month of fasting and feasting. Old Delhiites are of the view that the true essence of Iftar is best savoured on the narrow street corners with great company. And that is exactly what inspired Anubhav Sapra, to come up with a novel idea — Delhi Food Walks, four years back to celebrate the festivities of Ramzan. Also Read – ‘Playing Jojo was emotionally exhausting’With the advent of Ramzan, Delhi Food Walks is back with the most awaited food walks of the year. The Food Walk in question is the Ramzan Food Walk which started on June 20, and will stay till July 12. Almost a month long, this food extravaganza is divided into — a dawn walk at the time of Sehri (11pm to 5am) and a dusk walk at the Iftar time (6pm to 9pm). You can book your attendance by registering online, and choosing any date and time of your convenience. Also Read – Leslie doing new comedy special with NetflixAttendees from different walks of life come together to relish the exotic offerings of Purani Dilli, delicacies like hot and dripping jalebis, aloo chaat: crisp fried potato cutlets dipped in chutneys with onions and spices adding to the flavour; paranthas stuffed with a variety of fillings like potato, onion, cottage cheese, cauliflower, radish, dry fruits and khoya. Coupling up biryani and roomali rotis with the most succulent and softest of kebabs, fried chicken and butter chicken is an all time hit amongst the non-vegetarians.  There’s a lot of options in desserts too. Try out the chilled, creamy phirni served in earthen pots to conclude the sumptuous meal. Kulfi is also available in blackberry, pomegranate, mango, litchee, and guava flavours which is served to fulfil your crave for some sweets. For the one who are used to treat themselves with varieties of delicacies and are open to socialise over food, this Food Walk is the place to be. While enjoying the food, do not miss the opportunity to explore the great corridors and the enchanting bylanes of Old Delhi accompanied by an interesting heterogeneous mix of people. It can’t get any better! The offerings are sure to leave your taste buds satiated with food that might be new for most of us. With the spirit of Ramzan around, it is bound to be an experience of a lifetime, atleast for a few, if not all.“The idea is to explore the authentic food of Old Delhi and understanding the food culture of the locals”, said Anubhav Sapra, the Foodie-In-Chief of Delhi Food Walks. He rightly chose food to promote inter-faith understanding and to show solidarity with the fellow beings. Coming together for a feast especially for Ramzan, promotes the feeling of bonhomie amongst the varied cultures.“The Sehri Walk is the most popular one, as the shops in the narrow by-lanes of Old Delhi are opened throughout the night only during the month of Ramzan” Sapra added.last_img read more

Festival of Dance and Music enthralls connoisseurs

first_imgThe Parampara Series, which is conducted right after the soothing monsoon and just before the withering autumn, has stood firm for the last 18 years and is now synonymous with Delhi’s annual cultural scene. Over time Parampara has blended concerts by presenting classical geniuses under creative themes giving uniquely fresh approach to otherwise traditional arts forms.This year Natya Tarangini presented Parampara Series from September 25 to 27 which was performed from 7 pm to 10 pm at Kamani Auditorium.  Also Read – ‘Playing Jojo was emotionally exhausting’The festivals represented some of the most successful dance productions of recent times in addition to musical concerts by legendary artists.  As always the Parampara Series showcased two concerts every evening (Dance and Music).On day one, Dr Raja Radha Reddy and his group performed the Kuchipudi Ballet titled Mahanatyam and Pt. Sanjeev Abhayankar hit the soul of the audience through his music and provided a soothing experience for the listeners.Dr Raja Radha Reddy and Kaushalya Reddy’s efforts are always to bring new concerts and themes while promoting traditional art forms.last_img read more

CBI summons Kunal Ghosh over Saradha case

first_imgKolkata: Member of Parliament Kunal Ghosh was called by the CBI regarding the Saradha chit fund case on Monday. He met with the investigators in the morning and left CGO complex at around 4 pm. Sources informed that the talks between investigators and Ghosh were concentrated on his previous statements.Though Ghosh acknowledged the call, he refused to say anything related to the talks with the CBI officers. On Monday, he said: “I Went there and cooperated with the investigators. I will not comment anything regarding the investigation. I had earlier gone to the CBI office and cooperated with them. In future I will do the same if they need me.”According to the sources, CBI right now is trying to recreate the situation based on the letter and other statements of Ghosh, which they had recorded previously.last_img read more

Know why employees dont give their 100

first_imgIf you think that your team is not performing to their best, rather that howling or blaming them, check if they are avoiding good work because of your bossy or Hitler-like attitude.According to researchers from the University College London and colleagues, when someone gives us an order, we actually feel less responsible for our actions.“Many good people get convinced to do something bad that they are unwilling to do because they actually feel less responsible for their own actions and painful consequences,” the study noted. To reach this conclusion, the team sought to answer this question by measuring a phenomenon called “sense of agency”.  Also Read – ‘Playing Jojo was emotionally exhausting’They measured “sense of agency” to explore changes in perception when someone delivered a mild electric shock to another person, either on orders or by their own choice. When the participants chose freely, they were encouraged along with the promise of a small financial gain. They also knew exactly what kind of harm they were inflicting because pairs of participants traded places with each other. Coercion led to a small but significant increase in the perceived time interval between action and outcome in comparison to situations in which participants freely chose to inflict the same harms, the study found. Also Read – Leslie doing new comedy special with NetflixInterestingly, coercion also reduced the neural processing of the outcomes of one’s own action. The study claims of reduced responsibility under coercion that could indeed correspond to a change in basic feelings of responsibility, not just attempts to avoid social punishment.“Maybe some basic feeling of responsibility really is reduced when we are coerced into doing something,” said Patrick Haggard from University College London. People often claim reduced responsibility because they were “only obeying orders”. “But are they just saying that to avoid punishment or do orders really change the basic experience of responsibility?” Haggard stated in the paper published in the Cell Press journal Current Biology.When you feel a sense of agency, you feel responsible for an outcome, you get changes in experience of time where and what you do and the outcome you produce seem closer together.last_img read more

To clear Graduation under CBCS students need to score 30 marks in

first_imgKolkata: Students of Calcutta University have to score 30 percent marks in all the subjects for clearing their Graduation under the Choice Based Credit System (CBCS) that has been introduced in the varsity from this year onwards.This was decided after a meeting with principals of colleges affiliated to CU at Rajabazar Science College campus on Saturday afternoon. Senior officials of CU including Vice-Chancellor Sonali Chakravarti Banerjee attended the meeting. Also Read – Rain batters Kolkata, cripples normal life”A student enrolled for a particular course in the CBCS system will have to complete the course within five years. After five years, it will be determined if the candidate has successfully completed the course or has failed. Therefore, no student will be detained in any semester. However, 30 percent marks in the subjects are required for passing,” a senior official of Calcutta University said. The University has also decided to make 60 percent attendance mandatory in all semesters for taking the examination.”The meeting was convened by the V-C to have an idea on whether the teachers are facing any problem in dealing with the CBCS system. A number of principals were patiently heard and doubts raised by them over certain areas were cleared by the senior officials of the varsity who attended the meeting,” a source said.last_img read more

Can smartphone apps diagnose illnesses No say experts

first_imgWith a barrage of smartphone health apps being launched globally — claiming to go beyond fitness or calorie checkers and spot mental illnesses or respiratory diseases — health experts stress that such digital applications can never be a replacement for a qualified, well-trained health service provider.An Australia-based digital health solution provider recently launched an app called ResApp that claims to diagnose respiratory diseases like pneumonia, croup and asthma with high accuracy through a cough into a smartphone. Also Read – ‘Playing Jojo was emotionally exhausting’Go to Apple App Store and you will find a plethora of apps claiming to diagnose depression, anxiety, schizophrenia and post-traumatic stress disorder (PTSD). There are nearly 1,500 depression-checking apps out there but according to experts, apps can at best give information or help monitor diet and health parameters but if these claim to diagnose an illness, there are serious medico-legal issues in making such a claim.“Apps may guide a patient to consult an appropriate doctor. However, an app by itself is not adequate to make a diagnosis. Diagnosis of a medical condition is made by detailed history and examination followed by investigations. This expertise is gained after several years of training and a digital app is not a replacement at all,” emphasised Dr Vipul Gupta, head, (neurovascular intervention centre) at Medanta-The Medicity. Also Read – Leslie doing new comedy special with NetflixGupta is soon going to launch an app called “Stroke and Neurointervention” — being developed with the non-profit Stroke and Neurovascular Intervention Foundation, where he is one of the founder members.The app will provide information to people about stroke awareness, prevention and treatment options. “The app will also have an emergency number to call. It will regularly update doctors about current treatments, latest advances and protocols and provide expert opinion on medical cases,” said Dr Gupta. When it comes to health apps, experts say that trust in health care cannot be created by answering merely a set of questions and getting an instant diagnosis as the variables are too high to be included in a single app.The key questions are: Is the app accredited by an agency or has the process been standardised by any council? Have double-blind clinical trials been performed on these apps for approval and do these prepare users for emergency situations? Are the people behind the apps health care providers or mere IT geeks who wish to monetise their efforts?“There is not enough evidence that such queries have been addressed when it comes to health apps. On the contrary, there is always an agreement clause which the user is made to click prior to use, absolving the app creator of any medical mishaps,” said Dr Amitabh Parti, unit head (internal medicine) at Fortis Medical Research Institute in Gurgaon.Dr Parti has come across many such tall claiming apps and found those misleading. “The efficacy of an app need to be subjected to multi-centric clinical trials and need to be assessed in varying clinical settings including individuals with many co-morbidities (more than one disease). We must realise there is no room for a redo in healthcare when it is a human life we are interfering with,” emphasises Dr Parti.Dr Rajeev Rathi, cardiologist at Max Super Specialty Hospital in the Capital, recently devised and launched an app to help a person find if he or she is suffering from a heart disease or not.Diagnosis in the field of mental health is largely clinical and questionnaires and apps at best can help with screening to help provide suggestions but not diagnosis.“It is important that applications are used for education and screening purpose and not for more and should aid in reaching experts to a larger population and make accessibility easier,” elaborates Dr Samir Parikh, director, department of mental health and behavioural sciences, at Fortis Healthcare.In a recent report in the scientific journal Nature, psychiatrist John Torous who chairs the American Psychiatric Association’s Smartphone App Evaluation Task Force, said: “Right now, it [apps] almost feels like the Wild West of health care.”last_img read more

An IndoRussian double portrait

first_imgDuring a panel discussion, in answer to the question whether or not one could make a collaborative film among the BRICS nations, Galina proposed a story idea on ‘Mahatma’ Haffkine – the doctor who invented the vaccine for cholera and the plague that helped a lot of Indians. He gained the respect of many and was given the title of ‘Mahatma’. Anton Chekov called him the ‘most unknown person in the world’ as he never gained worldwide popularity.What inspired you to be a film director? Also Read – Add new books to your shelfGalina: Look around and you’ll find many scenes suitable for filming. It is interesting to tell stories to people. My love and urge to be a storyteller, to some extent, drove me towards films. Some influences have been derived from theatre also, as I was basically a theatregoer, not a cinema goer.How did you bring in Leo Tolstoy and Mahatma Gandhi in your movie?If you ask anybody in the streets of Moscow about Leo Tolstoy they’ll all say that Tolstoy was a great Russian writer, and if you ask them who Gandhi was, they’d say that he was a great Indian ‘writer’. But if you had asked this question 20 years ago, everybody would say he was a great Indian philosopher. Time shows the change in generation and their knowledge. The new generation is not much aware of Gandhi. But there is a monument, and a street named after him in Moscow which shows that Gandhi as an Indian philosopher and political person is very famous in our country.  Also Read – Over 2 hours screen time daily will make your kids impulsiveThe last year of Tolstoy’s life brought about some exchange of mails between him and Mahatma Gandhi where they discussed the ideas of non-violence. The movie is based on these mails. These mails are now preserved in Tolstoy Estate, in Yasnaya Polyana.An Indian Ambassador in Russia often used to visit that place. Once, we met at Yasnaya Polyana and he reminded me of the interesting story of the mails shared between the two great men. There is abundant literary material available on this topic. Many scientists and historians have been interested in this theme as well. He asked me if I was going to make a film on this topic, and I said ‘yes’ as that was a very interesting subject to express through cinema and so I made Leo Tolstoy and Mahatma Gandhi: a Double Portrait in the Interior of the Age. The Indian Embassy and Russian museums have helped us. The museums provided us with the archive footages which had never been seen by anybody before. Please tell us about the making of the film.Tolstoy had actually helped me. He had described some very unusual stories and events in the mails to Mahatma Gandhi. The film is based on the documentary material but according to the laws of the filming it would be a fiction film. The dramatism and conflict in the film have been achieved though only one voice running throughout the film rather actors enacting, yet the dramatism is very strong. This is the secret of my film making. I am an awarded director in Russia as I know how to grab the audience’s attention (laughs). I have tried to portray the thoughts of these great minds.Among all the movies you have made till date, which is your favourite?Cinema and theatre are my fields of work. But to answer your question, all I could say is that my ‘last film’ is my favourite since it is still fresh in the memory.During a discussion revolving a film on Zimbabwe, I got reminded of the conflicts in both, Zimbabwe and Russia. In 1917, Russia, due to the post world war situation, saw a divide between the rich and the poor and in Zimbabwe, it was the white and black people against each other. Today it is Russian and Ukrainians against each other. Therefore, Leo and Gandhi are the thinkers who gave some answers to questions like how one could survive in this cruel world.Did you get inspiration of filmmaking from your mother?Anna: We have worked together in several films, I have been helping her with many films in the studio until I made my first film, which was also based on archive material and is called The Hall. It is based on a building in Moscow which had witnessed many crucial events in the country’s history. The whole story is told from the point of view of the building.last_img read more

Two concerts feature songs of yesteryears

first_imgAt a concert on December 6, the focus was Bengali theatre and its music, specifically songs, used in cinema or chhaya-chhabi right from its birth on screen in the early twentieth century. Over the years, these film-songs were influenced by the popular genre of theatre or Mancha-Gatha. The songs touch all aspects of life — romance, weddings, funerals, rituals, get-togethers, even protests — and emerge as a medium to articulate every shade of joy and sorrow, love and longing, hope and despair. “In films like Sita and Alibaba, made in the 1930s, the songs from the original plays were used. We have covered the period from 1917 to 2017 in the concert. Also, some films from Bangladesh which have used songs from their theatre have been used”, director of the event Devajit Bandopadhyay told Millennium Post. Also Read – Add new books to your shelfThe concert was held at the Academy of Fine Arts where singers like Riddhi Bandyopadhyay and Devajit Bandyopadhyay performed, the narrator was Samiul Islam Poluck (Bangladesh), the script and direction was by Devajit Bandyopadhyay and his team, Academy Theatre Production.Songs like Keno Dekha Dile (Jor Borat), Aar Rekhona Amay (Notir Puja) by Riddhi Bandyopadhyay, Aji Esechhi (Shahjahan/Film-Balika Badhu), Karar Ei Lauha Kapat (Jibon Theke Neya) by Devajit Bandyopadhyay are worth a mention. Also Read – Over 2 hours screen time daily will make your kids impulsiveIn another concert, poets and songwriters like Tagore, Dwijendralal, Atulprasad, Rajanikanta, Himanshu Dutta, Dilip Kumar Roy who enriched the horizon of Bengali music scene with their melodious creations were showcased. Many of the songs got instant fame but many went unnoticed. Riddhi Bandyopadhyay, a noted vocalist, known for her brand “Pancha Kabir Gaan” initiated and conceptualized a musical, Smriti Bismritir Gaan”, at Abanindra Gallery (ICCR). The venture was jointly initiated by ‘Riddhi A Step for Music’ and ICCR. Singers like Riddhi Bandyopadhyay, Haimanti Shukla, Devajit Bandyopadhyay, Lopamudra Mitra, Sahana Bakshi performed at the event. What’s more, an audio CD titled PRONAAM featuring songs of Atul Prasad Sen was released on Perennial Records. Interestingly it features a song by legendary film actor Pahari Sanyal which came up for the first time in an audio CD. The rest of the six songs have been rendered by Riddhi Bandyopadhyay. ‘Ke Abar Bajay Banshi’, ‘Ami Jabona Ghore’ (Riddhi Bandyopadhyay), ‘Ami Okriti Adham’, ‘Keu Nayan Mude’ (Sahana Bakshi), ‘Swapan Parer Daak Shunechhi’, ‘Ulangini Nache Ranarange’ (Lopamudra Mitra), ‘Jibon Marane Eso’, ‘Jodi Diyechho Badhuya’ (Sudip Bandyopadhyay), ‘Aji Esechhi Badhu Hey,’ ‘Dhano Dhanyo Pushpe Bhora’ (Devajit Bandyopadhyay), ‘Diyechho Jibon Amrito Soman’, ‘Phir Kisiki Yaad Ayi’ (Haimanti Shukla) were presented. Undoubtedly, it was an unforgettable evening meant for music buffs.last_img read more