+123 456 7890 1600 Amphitheatre Parkway Mountain View, CA 94043

HP picks Intels Centerton for lowpower server rollout

first_img More information: www.hp.com/hpinfo/newsroom/press/2012/120619a.html HP and Intel have announced that Project Moonshot will be codenamed “Gemini” and will be powered by Intel Atom processors codenamed “Centerton.” The servers are being prepared for eventual rollout at HP’s Discovery Lab in Houston as a low-energy server solution for data centers.HP believes the Gemini servers offer a much improved level of efficiency in server systems. According to HP, the program “reinvents the traditional approach to hyperscale computing.” It leverages workload-optimized, extreme low-energy server cartridges in an enclosure that pools resources across thousands of servers. The Gemini server system will be able to accommodate thousands of Atom processors per rack and, using Intel‘s Centerton, will be able to handle specific workloads while drawing less power than Intel’s Xeon servers,Centerton is a version of the Atom chip especially suited for power-efficiency and in turn for energy-saving server systems in data centers. HP says its decision to have the initial system rollout with server cartridges featuring the Centerton processor has to do with the Centerton’s suitability for hyperscale workloads, using many extreme low-energy servers densely packed into a small footprint. More specifically, HP said reasons for its Centerton decision included Centerton’s 64-bit support, hardware virtualization (VTx), error correcting code (ECC) memory, lower power requirements, increased performance, and software ecosystem.The Gemini system was put through its paces earlier this week at a San Francisco demonstration event. “We’re going to disrupt the market overall,” claimed Paul Santeler, vice president and general manager of HP’s Hyperscale business unit. The Gemini server with Centerton-based cartridges are housed at HP’s Discovery Lab in Houston. This is the site that calls on engineering expertise to come up with customer solutions for data-center systems that can sell on the promise of reduced complexity, lower costs of ownership and energy savings. The lab invites customers to run their own benchmarks on the servers and to test-drive applications on them. The Gemini servers will become available for customer testing shortly and will begin shipping by year’s end. Citation: HP picks Intel’s Centerton for low-power server rollout (2012, June 22) retrieved 18 August 2019 from https://phys.org/news/2012-06-hp-intel-centerton-low-power-server.html Hewlett Packard puts mobile chips in data centers © 2012 Phys.Orgcenter_img (Phys.org) — Hewlett-Packard has a longer term message that reaches over all company announcements. HP wants the world to know that, never mind hasty CEO exits and entrances, never mind killing off brand-conscious products, never mind laying off floors and floors of expert workers; what it wants people to notice are the areas of outstanding expertise that remain. Namely, HP wants to make impressive waves in improving data center efficiencies. Despite all the drama, HP engineers who remain have been working on a data center server design, initially called Project Moonshot, that can help customers reduce server complexity, save on energy use and cut their costs. HP’s ambitious-sounding Project Moonshot this week is turning another corner. 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. Explore furtherlast_img read more

Read More »

Researchers devise a way to mimic gravitational lensing in a way that

first_img Citation: Researchers devise a way to mimic gravitational lensing in a way that can be seen (2013, September 30) retrieved 18 August 2019 from https://phys.org/news/2013-09-mimic-gravitational-lensing.html Journal information: Nature Photonics Analogue of light deflection in a gravitational field and microstructured optical waveguide. Credit: Nature Photonics (2013) doi:10.1038/nphoton.2013.247 (Phys.org) —A team of researchers working at China’s National Laboratory of Solid State Microstructures and Department of Physics has developed a means for mimicking gravitational lensing in a way that allows for viewing laser light actually being bent around a sphere. In their paper published in the journal Nature Photonics, the team describes how they constructed their microstructure, how it works and ways it might be used for a practical purpose. More information: Trapping light by mimicking gravitational lensing, Nature Photonics (2013) DOI: 10.1038/nphoton.2013.247AbstractOne of the most fascinating predictions of the theory of general relativity is the effect of gravitational lensing, the bending of light in close proximity to massive stellar objects. Recently, artificial optical materials have been proposed to study the various aspects of curved spacetimes, including light trapping and Hawking radiation. However, the development of experimental ‘toy’ models that simulate gravitational lensing in curved spacetimes remains a challenge, especially for visible light. Here, by utilizing a microstructured optical waveguide around a microsphere, we propose to mimic curved spacetimes caused by gravity, with high precision. We experimentally demonstrate both far-field gravitational lensing effects and the critical phenomenon in close proximity to the photon sphere of astrophysical objects under hydrostatic equilibrium. The proposed microstructured waveguide can be used as an omnidirectional absorber, with potential light harvesting and microcavity applications. Explore furthercenter_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. Physicists have known for almost a century that when light passes by an object, it is bent by the object’s gravitational pull. The bigger an object, or the stronger its gravitational pull, the more light can be bent. With an object such as a black hole, the pull can be so great as to cause the light to bend all the way around it, creating what is known as a photon sphere. In the real world, such events cannot be witnessed of course, because the light becomes trapped. In this new effort, the researchers sought to create a structure that would mimic light being bent around a sphere, but in a way that would allow it to be seen.The structure the team built is based on refracted light and the fact that different materials diffract light a different amount. The team started with a microscopic sized ball of polystyrene. They then used a spin coating process to cover the central sphere with a polymer coating—the spin technique allowed for varying the thickness of the polymer creating a material with a constantly changing degree of refraction. The varying degrees of refraction caused a laser light shone through the sphere to bend, effectively mimicking the action of black hole. But, because the light was being refracted into the center of the sphere, the researchers wouldn’t be able to see it—also just like a black hole. To get around this problem the researchers added quantum dots to the polymer coating—they absorbed a small amount of the laser light and then emitted it as red light—at an angle—directing it towards the researchers who recorded it all on videotape.In the video, the light from the laser can be seen bending as it’s brought close to the sphere, eventually reaching a point where it’s bent all the way around the sphere, creating an artificial photon sphere. The structure mimics a black hole and thus conforms to Einstein’s theory of general relativity, and for that reason, the researchers believe it can be used as a research tool. They suggest it might also prove useful in directing light onto solar cells. © 2013 Phys.org Fastest rotating man-made object createdlast_img read more

Read More »

Project turns to sensors in sewers to catch bombmakers

first_img The sensors are designed to pick up signs of the precursors of dangerous explosive devices, such as reagents and reaction-breakdown products. The concept targets those who try to make explosive devices with use of their private kitchens or bathrooms, where ingredients dumped down the drains through toilets, sinks, and tubs leak into the sewers. Substances of a threatening nature, once detected, become registered information sent to a command center. This concept is being explored in an EU-funded project called Emphasis. According to its project page, its reason for being is the detection of production of explosives. Nine project partners are carrying out work for such a system, The name Emphasis stands for Explosive Material Production Hidden Agile Search and Intelligence System, which further explains its mission. That mission is to test a system concept for the purpose of detecting the illicit production of explosives and improvised explosive devices (IEDs) in urban areas.Hans Önnerud, a research scientist, is the project manager. Onnerud is with the Swedish Defense Research Agency (FOI) in Sweden, one of Europe’s research institutes for defense and security. According to a report on Friday in New Scientist, an Emphasis project presentation was delivered at last month’s International Symposium on the Analysis and Detection of Explosives (ISADE) in The Netherlands, where Onnerud’s team said their tests in the lab were successful. The Emphasis sensors were developed and tested on faeces-rich wastewater in the lab and will be tested in sewers next year.Last year, FOI exhibited five projects that FOI was coordinating relating to preventing the manufacture of home made bombs, the location of bomb factories, the neutralization of improvised explosive devices (IEDs) and the development of new methods for a forensic analysis of a bombing scene, at the trade fair Security Essen, in Germany. A bomb sniffer sensor was one of the projects showcased as well as a biodetector based on honey bees for the detection of explosives. More information: www.newscientist.com/article/m … bombs-and-drugs.html © 2013 Phys.org (Phys.org) —A European research group has an answer for catching people who aim to make explosive devices at home. Waste products that go down the drain deliver clues. Sensors that can identify these ingredients and sound an alarm are the solution, Bomb-making residue in city sewers may be an important signal for finding bomb-makers out, thanks to special sensors placed in sewers. A project called EMPHASIS aims to do just that. Emphasis is an EU-funded project of team members who are working on a method of sniffing out home-made bomb setups through chemical sensors placed in city sewer systems. Under the scenario, if the sensors do find traces of explosives, an alarm is sounded, and a special police team swings into action with a with a high resolution sensing unit, conducting a search to pinpoint the site. 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.center_img Explore further Citation: Project turns to sensors in sewers to catch bomb-makers (2013, November 3) retrieved 18 August 2019 from https://phys.org/news/2013-11-sensors-sewers-bomb-makers.html Sensitive bomb detector to rove in search of dangerlast_img read more

Read More »

Sex among eukaryotes is far more common than once believed

first_img Citation: Sex among eukaryotes is far more common than once believed (2015, July 28) retrieved 18 August 2019 from https://phys.org/news/2015-07-sex-eukaryotes-common-believed.html The paper, published in the Proceedings of the National Academy of Sciences, points out that sex in multicellular organisms is simply clonal cell propagation among physically linked cells. “Hence,” the researchers write, “from the perspective of cell lineage, sex in multicellular organisms is as episodic as it is in facultatively sexual unicellular eukaryotes.” The authors’ emphatic conclusion is that “sex is a ubiquitous, ancient, and inherent attribute of eukaryotic life.”Notably, the paper emphasizes that zoologists would be aghast at the absence of observed sex, while microbiologists are far more receptive to the lack of sex in protists. Many protist groups, including ciliates and green algae, propagate via sex, but direct observation of those processes is lacking for the vast majority. Indeed, there are entire lineages of protists for which no evidence of sex processes exists. However, the authors screened scientific literature to find individual “signs of sex” in eukaryotic lineages, including physical observation of cell fusion or nuclear fusion, genetic evidence of meiosis or recombination, or changes in ploidy levels over the life cycle.Among the individuals screened, Jakobida, Glaucophyta, and Malawaimonadida—putatively asexual eukaryotes— were all found to contain genes involved in gamete fusion and/or nuclear fusion. The authors suggest that sex among unicellular eukaryotes is likely to be far more common than currently believed, and the lack of evidence of sexual propagation attributable to the difficulty of microbiological observation. Highlighting this difficulty, they point out a famous example of a particular type of algae with two morphologically different life cycle stages, which had been wrongly considered to be two separate species. What we don’t know about protist life forms still vastly outweighs what we’ve discovered. “…(W)e still have a tendency to underestimate how widespread sexual practices are in the different eukaryotic groups,” the authors write. Further, genome sequencing now supports the fundamentally sexual nature of eukaryotes. The authors cite numerous examples of putatively asexual eukaryotes found to express genetic traits associated with sex propagation. Giardia intestinalis was assumed to be asexual until genomic inspection revealed allelic differences indicative of sex. “The list of eukaryotic species that lack strong direct evidence for meiotic sex, but that seem sexual, as suggested by the presence of these meiosis-associated genes, is growing longer and longer,” the authors write.There are numerous adaptive benefits to sex: It creates genetic variation, repairs DNA breaks, and prevents the accumulation of disadvantageous mutations. Sexual reproduction is also associated with species survival during adverse periods. Because of these advantages, the authors suggest, even asexual species overwhelmingly retain the option for meiotic sex propagation, even despite some of the disadvantages of sex for protists.The paper goes on to speculate on the possibility that the evolution of meiotic sex was a defensive response to DNA-damaging effects of reactive oxygen species, and considers the possible influence of endosymbiotic organisms like chloroplasts and mitochondria on the evolution of sex. (Phys.org)—For a long time, biologists have considered sex to be an inherent trait of multicellular life, while microbial eukaryotes were considered to be either optionally sexual or purely clonal. From this perspective, clonality in eukaryotes is seen as exceptional. However, a group of researchers Europe and Canada have recently published a paper examining this broad distinction more closely, and have suggested that it appears to stem from an improper comparison of unicellular and multicellular species. Explore further Sexual assaults less likely in neighborhoods where registered sex offenders live More information: “Sex is a ubiquitous, ancient, and inherent attribute of eukaryotic life.” PNAS 2015 112 (29) 8827-8834; published ahead of print July 21, 2015, DOI: 10.1073/pnas.1501725112AbstractSexual reproduction and clonality in eukaryotes are mostly seen as exclusive, the latter being rather exceptional. This view might be biased by focusing almost exclusively on metazoans. We analyze and discuss reproduction in the context of extant eukaryotic diversity, paying special attention to protists. We present results of phylogenetically extended searches for homologs of two proteins functioning in cell and nuclear fusion, respectively (HAP2 and GEX1), providing indirect evidence for these processes in several eukaryotic lineages where sex has not been observed yet. We argue that (i) the debate on the relative significance of sex and clonality in eukaryotes is confounded by not appropriately distinguishing multicellular and unicellular organisms; (ii) eukaryotic sex is extremely widespread and already present in the last eukaryotic common ancestor; and (iii) the general mode of existence of eukaryotes is best described by clonally propagating cell lines with episodic sex triggered by external or internal clues. However, important questions concern the relative longevity of true clonal species (i.e., species not able to return to sexual procreation anymore). Long-lived clonal species seem strikingly rare. We analyze their properties in the light of meiotic sex development from existing prokaryotic repair mechanisms. Based on these considerations, we speculate that eukaryotic sex likely developed as a cellular survival strategy, possibly in the context of internal reactive oxygen species stress generated by a (proto) mitochondrion. Thus, in the context of the symbiogenic model of eukaryotic origin, sex might directly result from the very evolutionary mode by which eukaryotic cells arose.center_img Representatives of deep eukaryotic lineages without published evidence for sex thus far. (A) Picomonas judraskeda (Picozoa). (B) Andalucia incarcerata and another, thus far undescribed jakobid (Jakobida). (C) Ancyromonas sigmoides (Ancyromonadida). (D) Roombia truncata (Katablepharida). (E) Breviata anathema (Breviatea). (F) Telonema subtilis (Telonemia). (G) An undescribed malawimonad (Malawimonadida). Images courtesy of Petr Táborský (B), Aaron Heiss (C, E, and G), and Akinori Yabuki (F); A and D were adapted from refs. 118 and 120. (Scale bars, 5 μm.) Credit: PNAS 2015 112 (29) 8827-8834; published ahead of print July 21, 2015, doi:10.1073/pnas.1501725112 Journal information: Proceedings of the National Academy of Sciences © 2015 Phys.org 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

Read More »

Encounters with familiar strangers play overlooked role in human interactions

first_img © 2016 Phys.org The researchers, Di Liang, Xiang Li, and Yi-Qing Zhang, at Fudan University in Shanghai, China, have published a paper on their analysis of familiar strangers in a recent issue of EPL.”This is the first work to identify familiar strangers from other human relationships and explore their special encounter patterns, which may inspire further studies on this common but overlooked relationship and its potential applications,” Li told Phys.org.Although researchers have known about the general concept of familiar strangers for several decades, no work has specifically investigated these encounters. Instead of being identified as such, familiar strangers are typically lumped together with general strangers and therefore regarded as “harmful noise.” The new study shows that this assumption is far from the truth. The researchers classified human relationships into four types: in-roles (who include colleagues, classmates, and others who we are acquainted with and see on a regular basis), friends (those who we are acquainted with, but do not see regularly), strangers (those who we are neither acquainted with nor see regularly), and familiar strangers (those who we see regularly but are not acquainted with). By analyzing two Wi-Fi datasets and one dining hall data set from college campuses, the researchers classified all of the instances when two individuals were at the same place at the same time into one of the four types of human relationships. They found that strangers made up the largest percentage of relationships, followed by familiar strangers. Both types of strangers greatly surpassed the percentage of social acquaintances, with in-roles being the third most common relationship type, followed by friends. The researchers also found that, while the number of social relationships an individual can maintain is conventionally thought to be limited by the Dunbar number, which is 150, strangers and even familiar strangers do not face such a limit. The analysis shows that the number of familiar strangers an individual may encounter on a regular basis is much larger than the Dunbar number, and seems to be primarily affected by the behavioral patterns of the population as a whole. As might be expected, encounters with familiar strangers tend to occur in a frequent and periodic manner, since they are often a result of individuals’ daily or weekly routines briefly overlapping. This high regularity and stability of encounters with familiar strangers makes these encounters highly predictable, potentially providing a useful tool for predicting important nodes in networks with unknown topologies. This ability could, in turn, help researchers predict the risk of disease epidemics, which could influence immunization strategies. Familiar strangers, in particular, could be prime targets for controlling the spread of contagious diseases. “The encounters of familiar strangers are highly predictable, which may help to optimize robust network paths for information sharing,” Li said. “Besides, given a reliable trust between familiar strangers, when assessing the ‘risk’ of an individual in disease spreading, it would be more accurate if we identify or predict his/her encounters with familiar strangers, instead of only considering the strong relationships, such as friends and co-workers. Therefore, we can design new target means on the generalization of an acquaintance immunization strategy against a pandemic.”In the future, the researchers plan to continue to improve the familiar stranger classifier performance and further investigate the potential applications, including human mobility prediction and information diffusion. Journal information: Europhysics Letters (EPL) Explore further Friends are no better than strangers in accurately identifying emotion in emails More information: Di Liang, Xiang Li, and Yi-Qing Zhang. “Identifying familiar strangers in human encounter networks.” EPL. DOI: 10.1209/0295-5075/116/18006center_img Citation: Encounters with ‘familiar strangers’ play overlooked role in human interactions (2016, December 9) retrieved 18 August 2019 from https://phys.org/news/2016-12-encounters-familiar-strangers-overlooked-role.html (Left) Researchers have classified four types of relationships based on low or high encounter regularity and low or high level of acquaintance. (Right) The results from three datasets on human encounters show that we encounter more familiar strangers than people with whom we are highly acquainted (both in-roles and friends). Credit: Liang et al. ©2016 EPL (Phys.org)—According to a new study, there are more familiar strangers in our lives than friends, coworkers, and all other acquaintances combined. Encounters with familiar strangers, defined as pairs of individuals who repeatedly encounter each other but have never been acquainted, has so far been overlooked in research on human networks. The new study finds that familiar strangers may play a significant role in processes such as information sharing and disease spreading. 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

Read More »

Controlling ice formation

first_img Researchers discover new material to improve de-icing (Phys.org)—Researchers have demonstrated that ice crystals will grow along straight lines in a controlled way on microgrooved surfaces. Compared to the random formation of ice crystals on smooth surfaces, the ice on the microgrooved surfaces forms more slowly and melts more quickly, which could lead to improved anti-icing and deicing methods. Ice formation is currently a major problem in a wide variety of areas, including solar panels, refrigeration systems, power transmission systems, and aircraft, and the new surface may help reduce ice build-up in these systems. Explore further More information: Ching-Wen Lo, Venkataraman Sahoo, and Ming-Chang Lu. “Control of Ice Formation.” ACS Nano. DOI: 10.1021/acsnano.6b07348 The researchers, Ching-Wen Lo, Venkataraman Sahoo, and Ming-Chang Lu at National Chiao Tung University in Taiwan, have published a paper on the surfaces for controlling ice formation in a recent issue of ACS Nano.”In the work, we demonstrated the control of ice nucleation and ice crystal growth kinetics by manipulating the local roughness scale,” Lu said. “The control of nucleation and the confinement of ice growth kinetics can improve anti-icing and deicing performances on a surface. We anticipate that the concept can pave the way towards the development of new engineered anti-icing surfaces.”The key idea behind the microgrooved surfaces is that ice crystals preferentially form, or “nucleate,” on the microgrooves. So by adjusting the shape and number of microgrooves, the researchers could control the formation of ice crystals on the surface. They showed that ice forming on a special V-shaped microgroove surface takes longer to cover the surface and melts faster compared to ice that forms on smooth surfaces. This is not the first type of anti-icing surface to be developed. In the past few years, researchers have been designing superhydrophobic surfaces in efforts to prevent ice formation. Since superhydrophobic surfaces repel water, they are also “ice-phobic,” exhibiting lower ice adhesion than normal surfaces. However, at very low temperatures most of these surfaces still experience frost formation. When frost accumulates and covers the entire surface, the surface loses its ice-phobic property. One of the advantages of the new microgrooved surfaces is that they can control ice formation due to frost. A surface that can reduce ice build-up has the potential to impact a wide variety of areas. The negative effects of ice include reducing the efficiency of solar panels and refrigeration systems, damaging the electrical insulation on power transmission systems, compromising aircraft safety, and harming agricultural crops. “One of the applications is to alleviate the icing issue on solar panels,” Lu said. “Icing and snow accumulation on the solar panels can deteriorate their energy conversion efficiency. Our future plan is to design a surface with full control of the ice formation process, including nucleation, crystal growth, and ice spreading.”Understanding and controlling ice formation may even help address the problem of melting glaciers.”In addition, the ultimate goal of the research is to have full control of the ice formation process,” Lu said. “The insight learned from this work might be applied to alleviate the adverse impact caused by global warming, for example, the loss of ice sheets.” Journal information: ACS Nanocenter_img Citation: Controlling ice formation (2017, March 24) retrieved 18 August 2019 from https://phys.org/news/2017-03-ice-formation.html © 2017 Phys.org Ice crystals form along the microgrooves of the new surfaces. Credit: Lo et al. ©2017 American Chemical Society 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

Read More »

Antifatiguefracture hydrogels

first_img Patterning highly crystalline regions in PVA hydrogels. (A) Illustration of introducing a highly crystalline region around crack tip. Inset: Raman spectroscopy with bright color representing low water content and dark color representing high water content. (B) Comparison of crack extension per cycle dc/dN versus applied energy release rate G between the pristine sample and the tip-reinforced sample. The fatigue thresholds of the pristine sample and the tip-reinforced sample are 15 and 236 J/m2, respectively. (C) Illustration of introducing mesh-like highly crystalline regions. Inset: Digital image correlation (DIC) method shows large deformation in low-crystallinity regions and small deformation in high-crystallinity regions. (D) Crack extension per cycle dc/dN versus applied energy release rate G of the mesh-reinforced sample. The fatigue threshold of the mesh-reinforced sample is 290 J/m2. (E) Water contents of the pristine sample, the tip-reinforced sample, the mesh-reinforced sample, and the fully annealed sample. (F) Young’s moduli of the pristine sample, the tip-reinforced sample, the mesh-reinforced sample, and the fully annealed sample. (G) Illustration of introducing highly crystalline regions around cut tips in a pristine kirigami sheet. (H) Effective nominal stress versus stretch curves of the reinforced kirigami sheet under cyclic loads. Effective nominal stress versus stretch curve of the pristine kirigami sheet under a single cycle of load. (I) Images of the reinforced kirigami sheet under 1000th cycle and under 3000th cycle. (J) Comparison of fatigue thresholds and water contents among reported synthetic hydrogels PVA hydrogels with patterned highly crystalline regions, and biological tissues. (K) Comparison of fatigue thresholds and Young’s moduli among reported synthetic hydrogels, PVA hydrogels with patterned highly crystalline regions, and biological tissues. IPN in (J) and (K) represents interpenetrating polymer network. Credit: Science Advances. Doi: 10.1126/sciadv.aau8528 Hydrogels are polymer networks infiltrated with water, widely used for tissue engineering vehicles of drug delivery and novel platforms for biomedical engineering. Emerging applications for new hydrogel materials call for robustness under cyclic mechanical loads. Materials scientists have developed tough hydrogels that resist fracture under a single cycle of mechanical load, yet these toughened gels still suffer from fatigue fracture under multiple cycles of loads. The present fatigue threshold for synthetic hydrogels is reported in the order of 1 to 100 J/m2. To form hydrogels crosslinked by crystal domains during materials development, the scientists first froze a solution of uncrosslinked PVA at -20 degrees C for 8 hours and thawed it at 25 degrees C for 3 hours. This was followed by further drying in an incubator at 37 degrees C and annealing at 100 degrees C for a variety of time ranges from zero to 90 minutes. As a control, the scientists also fabricated a chemically crosslinked PVA without crystal domains (amorphous polymer network). To measure the crystallinities of the resultant PVA hydrogels in their dry state, Lin et al. used differential scanning calorimetry (DSC). The crystallinity of the PVA samples increased in the dry state and further evolved with increased annealing time. To quantify evolving crystalline morphology of the samples, the scientists used small angle X-ray scattering (SAXS) and wide-angle X-ray scattering (WAXS). To validate tuning of the crystalline domains in the PVA hydrogel with increased annealing time with phase images, the scientists used atomic force microscopy (AFM). The resulting images showed bright areas of relatively high modulus (corresponding to the crystalline domain) and dark areas of relatively low modulus (corresponding to the amorphous polymer).To perform all fatigue tests in the study, Lin et al. used fully swollen hydrogels immersed in a water bath to prevent dehydration-induced cracks. Using dog bone-shaped material samples, the scientists performed cyclic tensile tests and systematically varied the applied stretch. As the stretch increased, the crystalline domains transformed into aligned fibrils along the loading direction. More information: Shaoting Lin et al. Anti-fatigue-fracture hydrogels, Science Advances (2019). DOI: 10.1126/sciadv.aau8528 Jianyu Li et al. Designing hydrogels for controlled drug delivery, Nature Reviews Materials (2016). DOI: 10.1038/natrevmats.2016.71 Drug delivery and targeting. Nature. 1998 Apr 30;392(6679 Suppl):5-10. www.ncbi.nlm.nih.gov/pubmed/95 … Abstract&holding=npg Yu Shrike Zhang et al. Advances in engineering hydrogels, Science (2017). DOI: 10.1126/science.aaf3627 Biological tissues such as cartilage, tendons, muscles and heart valves with extraordinary anti-fatigue properties are comparatively superior to synthetic hydrogels. For instance, the biomechanics of fracture energy in the knee joint after prolonged cycles of loads is above 1000 J/m2. This is due to the inherent, anti-fatigue properties of biological tissues based on highly ordered and partially crystalline collagen fiber structures. Lin et al. were inspired to develop biomimetic hydrogels centered on such anti-fatigue properties of biological tissues. Their hypothesis was that increased crystallinity in synthetic hydrogels could increase the fatigue threshold of the material, therefore the fatigue threshold in such biomimetic materials will be higher since crystalline domains had to be fractured for crack propagation. In a recent study, Shaoting Lin and a team of materials scientists at the Massachusetts Institute of Technology (MIT) proposed the design of an anti-fatigue-fracture hydrogel. To develop the proposed hydrogel, the scientists needed the materials to have energies per unit area at a much higher value than that required to fracture a single layer of polymer chains. To accomplish this, they controlled the introduction of crystallinity in to hydrogels to substantially enhance their anti-fatigue-fracture properties. In this work, Lin et al. disclosed the fatigue threshold of polyvinyl alcohol (PVA) with a crystallinity of 18.9 weight percent (18.9 wt%) in the swollen state to exceed 1000 J/m2. The results are now published in Science Advances. The pioneering work of Gong et al has inspired materials scientists to engineer hydrogels that are increasingly tough to resist crack propagation in a single cycle of mechanical load for industrial and biomedical applications. Hydrogels are toughened via mechanisms to dissipate mechanical energy, such as the fracture of short polymer chains and reversible crosslinks into stretchy polymer networks. Yet, the existing tough hydrogels suffer from fatigue fracture under multiple cycles of mechanical loads. The highest fatigue threshold on record so far is 418 J/m2 for a double network hydrogel, poly (2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS)-PAAm. The outcome is credited to the high intrinsic fracture energy of the PAAm network with very long polymer chains. Lin et al. then compared the fatigue thresholds, water contents and Young’s modulus of hydrogels reported in literature. They showed that by patterning highly crystalline regions, tip- and mesh-reinforced PVA hydrogels could outperform the existing synthetic hydrogels. The materials can also maintain relatively high water content and low Young’s moduli. The scientists aim to apply this strategy of patterning to highly crystalline regions of various structures of hydrogels to improve anti-fatigue performance.In this way, enhancing the anti-fatigue-fracture performance of hydrogels can contribute to a number of applications and research directions in advanced materials. In biomedical engineering, anti-fatigue hydrogels can be used for hydrogel-based, implantable tissue replacements of the meniscus, invertebral disc and cartilage. These medical translations require mechanical robustness for long-term interactions with the human body. The newly developed anti-fatigue-fracture hydrogels can offer a novel materials platform for biomedical and industrial applications. Tension of the pristine notched sample and the tip-reinforced sample. The pristine sample fractures at the stretch of 1.2 with the fracture energy of 22 J/m2 . The tip reinforced sample can be stretched to 1.5 without rupture and reaches the fracture energy of 300 J/m2. Credit: Science Advances. Doi: 10.1126/sciadv.aau8528 To test the hypothesis, Lin et al. used PVA in the study as a model hydrogel with tunable crystallinity. They increased the annealing time of the PVA hydrogel to confer higher crystallinity, larger crystalline domain size and smaller average distance between the adjacent domains. The increased crystallinity greatly enhanced the PVA hydrogel fatigue thresholds (for a crystallinity of 18.9 weight percent, the fatigue threshold exceeded 1000 J/m2.) The scientists then created kirigami hydrogel sheets that were highly stretchable and resistant to fatigue fracture. They based the hydrogel models on a strategy to maintain high water content and low moduli, while rendering the hydrogels resistant to fatigue fracture. The new work revealed a new anti-fatigue-fracture mechanism in hydrogel development, as well as a practical method to design such hydrogels for diverse practical applications. Citation: Anti-fatigue-fracture hydrogels (2019, February 11) retrieved 18 August 2019 from https://phys.org/news/2019-02-anti-fatigue-fracture-hydrogels.html Design principle for anti-fatigue-fracture hydrogels. (A) Illustration of fatigue crack propagation in an amorphous hydrogel and in hydrogels with low and high crystallinities under cyclic loads. The yellow areas represent crystalline domains, and the blue areas denote amorphous domains. In the amorphous hydrogel and the hydrogel with low crystallinity, the fatigue threshold can be attributed to the energy required to fracture a single layer of polymer chains per unit area. In the hydrogel with high crystallinity, the fatigue crack propagation requires fracture of crystalline domains. (B) Illustration of measuring nominal stress S versus stretch λ curves over N cycles of the applied stretch λA. The stress-stretch curve reaches steady state as N reaches a critical value N*. (C) Illustration of measuring crack extension per cycle dc/dN versus energy release rate G curves. By linearly extrapolating the curve to intercept with the abscissa, we can approximately obtain the critical energy release rate Gc, below which the fatigue crack will not propagate under infinite cycles of loads. By definition, the fatigue threshold Γ0 is equal to the critical energy release rate Gc. Credit: Science Advances. Doi: 10.1126/sciadv.aau8528center_img Top panel: Measurement of fatigue thresholds of PVA hydrogels. Nominal stress S versus stretch λ curves over cyclic loads for (A) chemically cross-linked hydrogel at an applied stretch of λA = 1.6, (B) freeze-thawed hydrogel at an applied stretch of λA = 2.2, and (C) 90-min dry-annealed hydrogel at an applied stretch of λA = 2.0. Crack extension per cycle dc/dN versus applied energy release rate G for (D) chemically cross-linked hydrogel, (E) freeze-thawed hydrogel, and (F) dry-annealed hydrogel with annealing time of 90 min. (G) The fatigue threshold increases with the crystallinity of the hydrogel in the swollen state. (H) Validation of fatigue threshold as high as 1000 J/m2 in 90-min dry-annealed hydrogel using the single-notch test. Lower panel: Young’s moduli, tensile strengths, and water contents of PVA hydrogels. (A) Young’s modulus versus crystallinity in the swollen state. (B) Tensile strength versus crystallinity in the swollen state. (C) Water content versus crystallinity in the swollen state. Credit: Science Advances. Doi: 10.1126/sciadv.aau8528 Explore further Journal information: Science Advances The energy required to damage the crystalline domains and fibrils was much higher than that required to fracture a single layer of the same polymer in its amorphous state. The scientists quantified the dependence of the fatigue threshold on the crystallinity. Both Young’s modulus and the tensile strength of the hydrogels increased with crystallinity. Lin et al. then proposed another strategy to introduce specifically programmed, highly crystalline regions in the hydrogels. For this, they used computer-aided design of electric circuits to induce localized heat treatment to anneal selected regions of the hydrogels. As examples of the procedure, Lin et al. locally introduced a highly crystalline ring-shaped region around a crack tip. Despite the small area, the alteration caused a fatigue threshold of more than 236 J/m2 to delay crack propagation. As a second example, the scientists patterned mesh-like highly crystalline regions on the pristine hydrogel. The alternation conferred a fatigue threshold of 290 J/m2, relatively low Young’s modulus (627 kPa) and high water content (83 weight percent), compared with the pristine unmodified hydrogel. , Science © 2019 Science X Network Characterization of crystalline domains in PVA hydrogels. (A) Representative DSC thermographs of chemically cross-linked (Ch), freeze-thawed (FT), and dry-annealed PVA with annealing times of 0, 3, 10, and 90 min. (B) Water contents of chemically cross-linked, freeze-thawed, and dry-annealed PVA with annealing times of 0, 1, 3, 5, 10, and 90 min. (C) Measured crystallinities in the dry and swollen states of chemically cross-linked, freeze-thawed, and dry-annealed PVA with annealing times of 0, 1, 3, 5, 10, and 90 min. (D) Representative SAXS profiles of freeze-thawed and dry-annealed PVA, with annealing times of 0, 10, and 90 min. (E) Representative WAXS profiles of dry-annealed PVA with dry-annealing times of 0, 3, 10, and 90 min. a.u., arbitrary units. (F) SAXS profiles of 90-min dry-annealed PVA in the dry state and swollen state. The insets illustrate the increase of the distance between adjacent crystalline domains due to swelling of amorphous polymer chains. (G) Estimated average distance between adjacent crystalline domains L and average crystalline domain size D of dry-annealed PVA with annealing times of 0, 1, 3, 5, 10, and 90 min. (H) AFM phase images of dry-annealed PVA with annealing times of 0 and 90 min. Credit: Science Advances. Doi: 10.1126/sciadv.aau8528 Hydrogels change water and solute dynamics 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

Read More »

Study provides new insights into stellar population and gas outflow in the

first_img More information: Pierre Vermot et al. New insights on the central stellar population and gas outflow in NGC 1068 from YJH spectroscopy with SPHERE/VLT. arXiv:1905.09208v1 [astro-ph.GA]: arxiv.org/abs/1905.09208 A new study conducted by French astronomers has delivered new insights about central stellar population and gas outflow in the spiral galaxy NGC 1068. Results of the research, presented in a paper published May 22 on arXiv.org, could be essential in improving our knowledge about physical processes taking place in the inner region of this galaxy. Hubble image of NGC 1068. Credit: NASA/ESA/A. van der Hoeven. Explore further © 2019 Science X Network Astronomers study star formation and gas flows in the galaxy NGC 1365 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. Citation: Study provides new insights into stellar population and gas outflow in the central region of NGC 1068 (2019, May 31) retrieved 18 August 2019 from https://phys.org/news/2019-05-insights-stellar-population-gas-outflow.html Located some 53 million light years away, NGC 1068 (also known as Messier 77 or M77) is a Syefert type 2 galaxy harboring a supermassive black hole (SMBH), a distinct narrow line region (NLR) and a strong, dusty source of infrared radiation hiding a Seyfert 1 nucleus. Due to its relatively close location and high luminosity of about several hundred billion solar luminosities, the galaxy has been a subject of numerous observations. However, although many studies of NGC 1068 have been conducted to date, fundamental questions about its active galactic nucleus (AGN) remain unanswered. While many structures in the nuclear region of this galaxy have been revealed, still very little is known about the physical processes occurring in the AGN.In order to answer these questions, a group of astronomers led by Pierre Vermot of Paris Observatory decided to conduct spectroscopic observations of the central region of NGC 1068, focusing on the characterization of the properties of stars, dust and gas and their spatial distribution. For this purpose they used the Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) of ESO’s Very Large Telescope (VLT).”In order to understand the physical processes taking place in the central region of NGC 1068 we performed a long-slit spectroscopy analysis of the nucleus in YJH bands (0.95—1.65 µm) at sub-arcsecond angular resolution (0.35″),” the astronomers wrote in the paper.Near-infrared observations conducted with SPHERE allowed the astronomers to decompose the observed continuum emission into four components: young stellar population (about 120 million years old), hot dust (with a temperature of around 800 K), scattered light from the hidden Seyfert 1 nucleus and a very hot stellar background. They also enabled the team to probe the gas physical conditions and its excitation mechanisms.The study found that hot dust is the main contributor to the flux in the very central region of NGC 1068. However, scattered light is also significantly detected. Beyond this area, but also in the central region of the galaxy, the continuum emission is dominated by the stellar content containing an extended very hot stellar population.Furthermore, the research found that emission lines exhibit a significant Doppler shift, suggesting that it could be due to a radial outflow from the nucleus in a biconical structure.”A Doppler shift has been measured in several of those lines ([S II], He I, [P II], Pa β , leading to the conclusion that they are tracing the outflow originating from around the nucleus whose northern part is moving toward the observer and southern part away from it,” the astronomers concluded.The authors of the paper added that their study demonstrates the potential of near-infrared spectroscopic observations in studying Seyfert 2 nuclei. They hope that further investigation of NGC 1068 with SPHERE will help them get a full picture of the processes in the galaxy’s central region.last_img read more

Read More »

Circle in CP today to make a difference

first_imgPrejudices pertaining to class, culture, religion, gender, and race have been the key features of our very secular society. We do celebrate the variety in our country and at the same time, abhor it. Who is to blame for the closed perceptions and fake synchronised lives that we live? Seems like the only way out of this cocoon is to question what actually controls our society. Is political expression the only expression left?To address all these issues, Yellowcat Theatre Co., an independent theatre company, is organising a workshop. Aptly titled Sitting Around Difference, it has Rebecca Mwase — an award-winning theatre artiste based in New Orleans, LA, US — as the main speaker. The idea of this workshop is not only to discuss and talk about the intersections of race, gender, religion and class, but to use story circle methodology, congregational singing, individual-derived movement and writing to explore personal relationships and experiences as they relate to gender, race, religion and class. Also Read – ‘Playing Jojo was emotionally exhausting’Participants will be encouraged to search for connection points and discover if storytelling and performance can lead to liberation.Rebecca’s work emerges from her own experiences as a woman, as an African-American woman, as a performer, and from the exploration of these multiple identities. ‘The story circle method is meant to encourage the broadening of perspectives by holding equitable space for people to share personal stories. By listening to and responding to the similarities and differences within experiences, we are able to get a more nuanced view of the issue or concept. Because race is tied to global perceptions of superiority and inferiority, listening to and exploring the themes communally should lead to greater insight,’ says Rebecca. Also Read – Leslie doing new comedy special with Netflix‘Even though we are a hugely diverse culture, we find it hard to deal with difference, to put it more specifically — we find it hard to negotiate difference. If we look at what has recently happened, and the effect it has had, then it stands to reason that there is an urgent need to engage with ‘difference’. As artistes, this is our pursuit — an imaginative response to the situations we find ourselves in. We know that one of the ways to respond is to protest, which even I was a part of, but we are forgetting that there is also an artistic response to the societal upheavals. As an artiste, I want to explore the artistic response to a situation as well. There cannot just be a political response. This workshop is for us to ponder about our response to the whole  situation. It is action oriented which will hopefully make people question things that haven’t been considered for long now, to access areas of our own self to help us understand how to respond,’ says Sukesh Arora, Artistic Director, Yellowcat Theatre Co.Keeping in mind the brutal gangrape, to which not just the Capital but the entire nation has finally awakened, an activity like this is not just another workshop, but a hopeful step forward to congregation and acceptance of useful and liberating responses and insights.DETAILAt: 36, The Attic, Regal Building, Connaught PlaceWhen: 3 JanuaryTimings: 9.30am to 5.30pmTo Register, Call: 9810026174last_img read more

Read More »

Dow Jones opens its 2nd largest ops centre after NYSE at BSE

first_imgAsia Index, a joint venture between S&P Dow Jones and the Bombay Stock Exchange, on Wednesday opened a new operation centre at the BSE premises which is its second largest operation centre after the one in New York.”We have opened new space at the BSE today, which is our second largest office after New York. The centre will cater to the growing index-investing needs of this market and provide back-office support for our global operations,” S&P Dow Jones Indices chief executive Alexander Matturri said. Also Read – I-T issues 17-point checklist to trace unaccounted DeMO cashThe Mumbai centre will employ 60 people, comprising research, product design, marketing, sales and IT operations, Matturri added. The New York-based S&P Dow Jones Indices, which is the world’s largest index provider, had entered into a 50:50 joint venture with the oldest Asian bourse last February to provide an array of indices enabling global and domestic investors to participate in South Asia’s vibrant economies. With the Sensex scaling new highs in anticipation of strong growth ahead, even projected to march ahead of China next year, Dow Jones Indices is looking at growing its business by introducing more products in this market. “We are looking at growing here by introducing more products. We are looking at more asset classes in the fixed income and commodities space. Also Read – Lanka launches ambitious tourism programme to woo Indian touristsWe have different strategies like smart data, alternate data and thematic data, and are also looking at several themes, which we are reviewing and researching on,” S&P Dow Jones Indices Asia managing director Alka Banerjee said. Asia Index has 35 products and has successfully launched four new indices last year, which includes S&P BSE India Sovereign Bond Index, BSE Shariah Index, Sensex Futures and the S&P BSE India Infrastructure Index. “We will come out at fairly rapid pace of launching new indices in next few months,” Banerjee added. S&P Dow Jones provides data for over tens of thousands of indices and subsets around the world, covering all major markets, including over 50 emerging markets, and all major asset classes. “After entering into a JV with the BSE, over the past one year, we are having good success in terms of bringing indices of global standards important in new regulatory environment. The process of developing new indices will continue and we will commercialise them and get them used by investors’ benchmarks on the basis of investment products,” Matturri said.last_img read more

Read More »

Asish Banerjee to meet Jyotipriya Mallick over atta distribution

first_imgKolkata: The state Agriculture minister Asish Banerjee will hold meeting with his counterpart Jyotipriya Mallick, the state Food and Supplies minister, in Nadia and Murshidabad to chalk out a plan of action to distribute atta in the districts.The decision to distribute atta in these two districts was taken up as there was no cultivation due to wheat blast.Banerjee along with Pradip Mazumder, advisor to the Chief Minister on agriculture, held a high-level meeting with Mallick in this connection on Tuesday. The meeting was held at the office of the state Foods and Supplies department at Khadya Bhavan. Also Read – Heavy rain hits traffic, flightsAfter the meeting, the agriculture minister said they will be holding the meeting in both Nadia and Murshidabad soon.”We will be holding meetings in both the districts soon.It may be recalled that crops on a 1000-hectre of land was affected in Nadia and Murshidabad in 2017 due to wheat blast. In a bid to ensure that it doesn’t spread further, cultivation of wheat was stopped. The restriction on cultivation of wheat is going to continue for the next one year. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killed”Now with the restriction in cultivation of wheat, there will be shortage in supply of atta in the districts. Hence, the state government is taking necessary steps to ensure sufficient supply of atta in the two districts by these means,” Banerjee said.The state Food and Supplies department will be playing a crucial role in this connection as atta will be given through the public distribution system and the people of these two districts can buy it at the market price. As per the assessment goes, there is a requirement of around 2000 metric tonne and 8000 metric tonne atta for Murshidabad and Nadia district respectively.It may be recalled that the state government had taken several steps to help farmers carry out alternate farming by cultivating mustard and pulses when wheat cannot be grown. Moreover, the farmers have received compensation as wheat had to be burnt to check the disease.The state government is seriously looking into the matter of cultivating wheat at Domkal in Murshidabad despite the restriction and would take strict steps in this connection.last_img read more

Read More »

Four killed six injured in lightning

first_imgKolkata: Four persons, including two schoolchildren, were killed and six others injured in three lighting strikes in Bengal’s South 24 Parganas district on Sunday, police said.Two schoolkids and a fisherman died when lightning struck them while playing football in Mahishmari area of Sagar island. Five others were battling for their lives in serious condition in a rural hospital.One fisherman was killed in the Patharpratima community development block. Also Read – Rain batters Kolkata, cripples normal lifeAnother person sustained serious injury in Raidighi community development block when he was struck by lightning.There is forecast that some of the North Bengal districts may also receive light to moderate rainfall in the next two days. The low pressure area that has formed over northwest Bay of Bengal will gain strength in the next 24 hours, which will bring the rainfall in South Bengal. The weather system islikely to move to north-west and may cause fairly widespread rainfall with isolated heavy rain in various South Bengal districts.last_img read more

Read More »

Listening to FM while driving is also dangerous

first_imgListening to traffic reports on the radio could be so dangerous for your driving that you could even miss an elephant standing by the side of the road, warns a study.“Anything that draws our attention away from driving can be problematic, even if it’s auditory like listening to the radio or having a hands-free phone conversation,” said one of the researchers Gillian Murphy of University College Cork in Ireland.The researcher applied a prominent theory of attention, Perceptual Load Theory, to driving, a task where attention is crucial. Also Read – ‘Playing Jojo was emotionally exhausting’Perceptual Load Theory states that we have a finite amount of attention and that once that capacity is maxed out, we cannot process anything else. To test whether paying attention to radio traffic reports can be bad for our driving, Murphy asked 36 people to drive a route in a full-sized driving simulator while listening to a traffic update on the radio.While driving, 18 participants were asked to complete a simple task and 18 to complete a complex task.  Also Read – Leslie doing new comedy special with NetflixThe simple task was to listen for when the voice giving the update changed gender. While the complex task was to listen for news of a particular road.The study found that only 23 per cent of the drivers undertaking the complex task noticed a large, unexpected visual stimulus – an elephant or gorilla by the side of the road.By contrast, 71 per cent of the drivers undertaking the simpler task noticed it.Drivers undertaking the complex task were also worse at obeying road signs, remembering which vehicle had just passed them and even at driving itself. Their speed, lane position and reaction times to hazards were all affected.The findings were presented at the British Psychological Society’s annual conference in Nottingham in Britain.“Road safety campaigns are so focused on telling us to keep our eyes on the road, and this is certainly important, but this research tells us that it’s simply not enough. We should focus on keeping our brains on the road,” Murphy said.last_img read more

Read More »

Surging prices of essential goods hinder Lakshmi Puja celebrations

first_imgKolkata: Sky-rocketing prices of essential commodities, including fruits have cast a shadow over Lakshmi Puja celebrations across the state.Over the past few years, the prices of various commodities, including vegetables, fruits, flowers, and other items needed during puja rituals have increased in leaps and bounds. Due to a steep rise in the cost of transportation, essential items are being sold at an exorbitant price. It may be mentioned that the state government on a number of occasions has raised their voice against the Centre over its failure to check the prices of essential items but no major steps seemed to have been taken. Also Read – Rain batters Kolkata, cripples normal lifeAs a result, people belonging to lower middle class section are having a tough time to arrange Lakshmi Puja this year. The Bengalis are celebrating Lakshmi Puja on Wednesday. But the prices of various items including fruits in most of the city’s markets are beyond the reach of common people. It may be mentioned that the prices of fruits have recently spiked. The vegetable sellers at Sealdah market have admitted that the prices are a little high this time but there were hardly any measures to check the rise in prices, claimed the fruit sellers. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedSubir Mondal, a fruit vendor at Sealdah market said: “The prices of fruits are high but we have nothing to do to control the price as there is a rule of the market. On various occasions including Durga Puja or Lakshmi Puja there is a rise in the demand of fruits but the supply remains static. As a result the prices go up.” Many people find it difficult to purchase vegetables due to high prices. On Tuesday, the prices of potatoes varied between Rs 24-30 per kg at various markets across the city and suburbs. The prices of Egg plant, Cauliflower and tomatoes remained at Rs 50-60, Rs 35-40, Rs 40-50 per kg respectively. “We had to cut down on a lot of things to meet our budget as the prices of various items were high,” said Binay Majumdar, a lower division clerk at a state government job. One Raju Biswas, an employee of a private farm and a resident of Entally, who came to Sealdah market said: “I have bought apples at Rs 100-140 per kg, cucumbers at 60-70 per kg, guavas at Rs 70 kg, bananas Rs 40-50 per dozen, oranges Rs 120-140 per dozen. Even the small Lakshmi idols were being sold at Rs 400-1,000 each at various markets, while buyers had to spend over Rs 1,000 for decorated ones.last_img read more

Read More »

Fouryearold drowns in pool at school

first_imgKolkata: Sambuddho Ghosh (4), an autistic child and a student of Asha School, Kolkata, drowned in a hydrotherapy pool on the school campus on Wednesday afternoon.Family members of the minor boy alleged negligence on the part of the school authorities and registered a complaint in this regard. The school is being run by the Army Wives Welfare Association under the arrangements of HQ Eastern Command, (EC AWWA). The Eastern Command has assured that a thorough inquiry would be conducted into the death of the victim. Also Read – Bose & Gandhi: More similar than apart, says Sugata BoseThe family members of the victim said Sambuddho secured second place in a race competition that took place in the school on Wednesday. The victim’s father was told to go home as the victim was supposed to return home in the school bus. Soon, after the father left the school he received a phone call from a guardian asking him to come to school. When the family members of the victim reached the school they came to know that the boy had gone missing. Also Read – Rs 13,000 crore investment to provide 2 lakh jobs: MamataLater, the victim was rescued from the hydrotherapy pool. He was taken to the SSKM Hospital where the doctors declared him brought dead. A relative of the victim said Sambuddho usually returned home by the school bus around 12.30pm everyday. The school provides education, care and rehab to the differently-abled children of defence personnel and civilians. The family members of the victim raised questions on the role of the school authorities. They said the boy went unnoticed by the teachers and attendants.last_img read more

Read More »

Saksham and Manthan festival back to dazzle Delhiites

first_imgGet ready to enjoy a two-day festival titled ‘Saksham and Manthan festival’ at Triveni Kala Sangam. Organised by Kalpataru Arts, the event will be held on October 11 and 12. (Saksham 4:00 pm – 6:00 pm and Manthan 6:30 pm onward )Saksham is a two day seminar on Indian classical dance, where eminent speakers will share their thoughts and concerns on the present scenario of classical dance. On October 11, guests including eminent scholar and ex director of Doordarshan Archive Kamalini Dutt, Art critic Leela Venkatraman and Odissi exponent Guru Sharon Lowen will share their thoughts on the topic ‘Generational shift in Classical Dance’. On October 12, the topic of discussion will be ‘Context of text in Kathak’. Kathak exponent and SNA awardee Guru Prerana Shrimali, Ex SNA Secretary and Kathak Guru Jayant Kastuar and Guru Rani Khanam will share their thoughts on this issue. The seminars will be moderated by art historian and Kathak exponent Navina Jafa. The sole aim of the seminar is to have a meaningful understanding of the purpose of maintaining classicism in classical dance form today.Manthan, on the other hand, aims to bring on stage world-class artists, established as well as young. The festival promises to be one of its kind. This year, artists like Sanchita Roy and Sangita Chaterjee will be performing on day one. On day two, Purvadhanashree and Parshwanath Upadhye will enthrall the audience with their performance.last_img read more

Read More »

Course on job skills for disabled

first_imgKolkata: People with disabilities (PwDs) will now have no dearth of jobs as three-month certificate course affiliated to National Skill Development Corporation will prepare them to crack any interview with confidence.The course is offered by the Sarthak Educational Trust across 18 centres in India. “Our aim is to provide vocational skills to the differently-abled people, enabling to have successful employment opportunities,” Dr Jitender Aggrawal, founder and CEO of SET and a dentist, who lost his vision in his early 30s due to macular degeneration (an eye disease that causes vision loss), told Millennium Post. Also Read – Rs 13,000 crore investment to provide 2 lakh jobs: MamataThe dentist reiterated that the idea to establish training for centres for especially-abled after he lost vision. He had two clinics in Delhi and one of it was converted into PwD training centre. SET training programme comprises Remedial Classes, Special Education, Pre Vocational Skills, Basic Skill Building, Sector Specific Training and Pre-Employment Module. It prepares trainees for employment opportunities in Retail, IT, Hospitality, Banking, E-Commerce, Health care and manufacturing sectors. “Census data shows that unemployment among PwDs is over 63 % and every second person among them is illiterate. We can’t afford to continue to ignore this vital segment of society as its empowerment cannot only make them self- reliant but will also tremendously contribute to India’s sagging GDP,” added Aggrawal. Established in 2008, the SET has trained and placed more than 15000 candidates.last_img read more

Read More »

Should the Giants worry about Odell Beckham Jrs growing fame

first_img Advertisement A recent GQ article detailed Beckham’s baller life, including a summer spent house sitting with Drake, and paints a picture of a budding star who wants to have his cake and eat it too, in terms of on field success and massive off field celebrity.Today on Speak for Yourself, Colin and  Jason were asked whether with Beckham’s borderline overexposure in such a short time will negatively impact his football performance. Colin said he doesn’t have any issue with Beckham’s off the field activities, because he doesn’t think wide receivers need to be team leaders.“There are certain positions in football, Center, Middle Linebacker, quarterback. I need communicators. I need guys who are talking. Calling audibles, at the line, Ray Lewis, what’s happening? Outside? I couldn’t hear you if you yelled anyway. Go be a star. Make 7 catches a game, and give me 14 touchdowns.”Whitlock thinks that although many rush to compare Beckham’s flamboyant personality to Terrell Owens, he’s more comparable to Rob Gronkowski, because his antics are viewed as playful, not corrosive.“He’s been one of the best wide receivers in the NFL, if not the best. Gronk’s been the best tight end in the National Football League. We allow them to be these outrageous personalities, on and off the field. Unlike Terrell Owens, where some of his on field antics got in the way of them winning, I haven’t seen anything yet from Odell Beckham, other than the fight with Josh Norman, that seemed to get in the way of them being a winner.”As Beckham approaches the upcoming NFL season with his star status continuing to rise, he’ll have to continue to prove to teammates and critics that his off the field appetite won’t affect his Pro Bowl production.After putting up an eye popping 187 catches and 2,755 receiving yards in two seasons, it’s hard to envision that summering  at Drake’s crib is going to slow his roll.“He is the Black Rob Gronkowski… we allow them to be these outrageous personalities off the field.” @WhitlockJasonhttps://t.co/JfenK6XRtF— Speak For Yourself (@SFY) July 21, 2016 If anyone questions the popularity of Giants superstar wide receiver Odell Beckham, all they need to do is walk outside their front door and watch two kids throw a football around. They’ll see them routinely practicing one handed catches, in attempts to mimic the ridiculous one hand grab Beckham made against the Cowboys that catapulted him into the national sports spotlight overnight. In honor of Beckham, the mainstream reference for making a one handed catch has been organically renamed “Odelling it”.center_img To Beckham’s credit, he is one of the few non-quarterback NFL players that has been successful in establishing crossover commercial marketing appeal. Beckham and his signature, and now often copied, flowing hairdo have already donned the Madden Football cover, and can be seen on TMZ as often as SportsCenter.last_img read more

Read More »

VIDEO LaVar Ball puts delusional spin on Lonzos bad debut and criticizes

first_imgLonzo Ball stunk it up in his debut for the Lakers, managing just 3 points and being physically manhandled, but that wasn’t close to enough to stop LaVar Ball from trying to shout into existence another delusional spin on his son’s first game dud.Ball spoke with Stephen A. Smith and Neil Everett after the game and proclaimed Lonzo played great – because of his 9 rebounds – but his teammates need to get out and run the floor more. He said he could score 20 just running down the middle of the floor. This is contrary to the widely known footage of him not being good at basketball. He also dropped the non-excuse/excuse that Lonzo had a bad foot.This seems like it will be exhausting over the course of the season. It already is. It’s not like Magic didn’t know what he was getting into.Here’s LaVar trying to verbally polish a turd:last_img read more

Read More »