Graphene nanoribbons grow due to dominolike effect

first_img Explore further Long and narrow, free of defects, and soluble: graphene nanoribbons by bottom-up synthesis (PhysOrg.com) — While many labs are trying to efficiently synthesize large two-dimensional sheets of graphene, a team of researchers from Sweden and the UK is investigating the synthesis of very thin strips of graphene just a few atoms wide. In contrast to graphene, these graphene nanoribbons have a unique electronic structure including a non-zero band gap, which makes them promising candidates for semiconductor applications. But, as with graphene sheets, one of the greatest challenges for now is finding a way to efficiently synthesize these graphene nanoribbons. In their study, researchers Jonas Björk and Sven Stafström from Linköping University in Sweden and Felix Hanke from the University of Liverpool in the UK have used a powerful supercomputer at Linköping University to investigate how graphene nanoribbons grow from an anthracene polymer on a gold substrate. The results of their study are published in a recent issue of the Journal of the American Chemical Society.The scientists discovered that, in the most likely nanoribbon growth process, the gold substrate acts as more than just a support where the reaction can take place. The gold actually catalyzes the reaction by attracting hydrogen atoms from the anthracene polymer (which is made of benzene rings) to bind to the gold surface, initiating the first step of the reaction. In this “dehydrogenation” process, two hydrogen atoms from each unit of the anthracene polymer are transferred to the gold surface, leaving behind a carbon-carbon bond. The carbon-carbon bond forms part of graphene’s honeycomb lattice. Meanwhile, the hydrogen atoms are released from the gold surface through desorption into the vacuum. The supercomputer also revealed that this dehydrogenation reaction repeats due to the effects of positive cooperativity: When a polymer unit has a neighbor that has a carbon-carbon bond, its probability for undergoing the same reaction and gaining its own carbon-carbon bond increases. The result is that the reaction, which starts at one end of the polymer, propagates unit by unit through the entire polymer in a domino-like fashion. After several minutes, the entire polymer is transformed into a well-defined graphene nanoribbon with a width of seven carbon atoms.Figuring out how graphene nanoribbons are synthesized in this way is a complicated molecular-scale process that can only be unraveled in detail by powerful supercomputers. Although there are a few other reaction pathways that the reaction could take, the researchers calculated that this reaction is very highly favored over the others: They estimated that 10,000 reactions proceed along this route than by the second most favorable reaction. Understanding the reaction will allow the researchers to identify the best fabrication method for future experiments and development. “This is a question about how to build materials, either ‘bottom-up’ (synthesis from its constituents) vs. ‘top-down’ (taking something bigger and cutting it to size),” Hanke told PhysOrg.com. “The bottom-up in the graphene nanoribbons approach is very interesting as it allows us to start with the ultimate size limit for a material (an atom, or, say, a small molecule) and then add only those pieces that are really, really needed. Moreover, it also allows us to make graphene nanoribbons that have consistently the same width of, say, seven Angstroms (7×10-10 m), simply by making sure that the ingredients are only polyanthracene and not anything much bigger. This sounds trivial, but it is actually very difficult to achieve in top-down approaches, particularly if atomic precision is desired.”The applications of graphene nanoribbons (and graphene itself) are still in the very early stages, but their properties make the materials look promising. Previous studies have shown that controlling the widths and edge structures of graphene nanoribbons can tune the ribbons’ electronic properties, which could lead to molecular-based electronics such as transistors. By gaining a better understanding of how graphene nanoribbons grow, including the catalytic role of the gold substrate and domino effect of the reaction, scientists have taken another step toward this future technology.“The main hype behind graphene nanoribbons is that you should be able to use them for semiconductor applications, which is due to their highly desirable electronic structure that is different from the electronic structure of graphene,” Hanke said. “The beauty of graphene nanoribbons is that their electronic response is determined simply by their shape. Therefore, being able to understand and build graphene nanoribbons in a controlled manner is a very important process for the continued development of electronics. In particular for anthracene-based nanoribbons, we have a width that is still about 30 times smaller than what is available in current semiconductor-based electronics.” Copyright 2011 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.center_img More information: Jonas Björk, et al. “Zipping Up: Cooperativity Drives the Synthesis of Graphene Nanoribbons.” Journal of the American Chemical Society. DOI:10.1021/ja205857a Citation: Graphene nanoribbons grow due to domino-like effect (2011, September 15) retrieved 18 August 2019 from https://phys.org/news/2011-09-graphene-nanoribbons-due-domino-like-effect.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Computer simulations show that graphene nanoribbons can grow from anthracene polymer on a gold surface in a way that resembles the domino effect. Image credit: Jonas Björk, creator. ©2011 American Chemical Societylast_img read more

Danger on ice Android info thaws in cold boot attack

first_img Samsung launches Galaxy A, its first Android smart phone for Korean market (Phys.org)—Can low temperatures yield access to information in the phone’s memory? Researchers found that a “FROST” attack can unlock an Android’s phone data. Their research findings discuss how hackers can freeze their way into a phone’s sensitive data. Researchers at Erlangen University in Germany showed how their cold boot attack method was able to read information from a Samsung Galaxy Nexus running the latest version of Android. Citation: Danger on ice: Android info thaws in cold boot attack (2013, February 18) retrieved 18 August 2019 from https://phys.org/news/2013-02-danger-ice-android-info-cold.html More information: www1.informatik.uni-erlangen.de/frostwww1.cs.fau.de/filepool/projects/frost/frost.pdf © 2013 Phys.orgcenter_img Explore further They said the hack can be achieved even if the phone is protected by a PIN and with its storage disk encrypted. They said they chose the Galaxy Nexus from Samsung because it was the first device with Android 4.0 and consequently it was the first Android-based smartphone with encryption support. Also, since it is an “official” Google phone, they added, it carries an official Android version from Google unmodified by the phone manufacturer. They said that Google releases are most amenable for in-depth security analysis.In their paper, they wrote, “We present FROST, a tool set that supports the forensic recovery of scrambled telephones. To this end we perform cold boot attacks against Android smartphones and retrieve disk encryption keys from RAM. We show that cold boot attacks against Android phones are generally possible for the first time, and we perform our attacks practically against Galaxy Nexus devices from Samsung.”Authors Tilo Mueller and Michael Spreitzenbarth of the Friedrich-Alexander University of Erlangen-Nuremberg discovered that Android’s boot sequence enabled them to perform cold boot attacks, and they observed how valuable information can be retrieved from RAM. According to the researchers, such cold boot attacks can allow the retrieval of sensitive information such as contact lists, visited web sites, and photos, directly from RAM, even though the bootloader is locked. By chilling the Galaxy Nexus, the researchers could bypass security settings and read from the phone’s memory. The recovery tool FROST stands for Forensic Recovery of Scrambled Telephones. In chilling the phone to freezing temperatures, the information lingered on in memory for five or six seconds, which was long enough to pull data out with a computer.Mueller and Spreitzenbarth found they could read data that included images, e-mails and web browsing history.Their research is not a first in explorations into cold-boot attacks, which were in evidence as early as 2008, shown on PCs. Their research, however, focused on mobile devices. The authors referred to data remanence, where the computer RAM holds residual information briefly even after the computer is shut down. Mueller observed that in cooling the phone the contents are lost in five or six seconds, enough time to reboot the phone and access the memory. Rebooting a phone more often may leave less sensitive data in its memory. On the flip side, their research is not only a warning for Android users but may be helpful for forensic experts who attempt to recover data from a seized phone. 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

Selfdriving vehicles at the microscale

first_img Play A microvehicle avoids collision with an obstacle. Credit: Li et al. ©2017 American Chemical Society The AI planner, which is at the heart of the smart navigation system, can also detect when the microvehicle drifts from its planned path, which can occur due to the presence of noise. In these cases, the AI planner can simultaneously measure the error and guide the microvehicle back onto the path.One of the main applications of this type of smart microvehicle may be in the biomedical field for tasks such as disease diagnostics, drug delivery, and precision surgery. To demonstrate, the researchers showed that the microvehicle can use the camera to sense and distinguish between cancer cells, red blood cells, and mixed cells, by recognizing differences in their size and shape. The AI planner then regards the cancer cells as the targets and the other cells as the obstacles, and plans a path accordingly. (Phys.org)—In a new study, scientists have developed the microscale version of self-driving vehicles: a 5-μm spherical micromotor that autonomously navigates its way through micro-traffic along a micro-maze to reach its final destination. The researchers expect that these “smart microvehicles” have potential applications in biomedical tasks, such as delivering drugs to tumor cells while avoiding healthy cells. Trajectories of a microvehicle through mazes. The path is planned by an artificial intelligence system and the microvehicle is guided by magnetic fields. Credit: Li et al. ©2017 American Chemical Society Citation: Self-driving vehicles at the microscale (2017, August 28) retrieved 18 August 2019 from https://phys.org/news/2017-08-self-driving-vehicles-microscale.html 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 New algorithm, metrics improve autonomous underwater vehicles’ energy efficiency More information: Tianlong Li et al. “Autonomous Collision-Free Navigation of Microvehicles in Complex and Dynamically Changing Environments.” ACS Nano. DOI: 10.1021/acsnano.7b04525 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 Journal information: ACS Nano The scientists, led by Longqiu Li at the Harbin Institute of Technology in China, and Joseph Wang at the University of California San Diego in the US, have published a paper on the smart microvehicles in a recent issue of ACS Nano.”We have embedded artificial intelligence into a micro/nanorobot,” Li told Phys.org. “We introduce a smart microvehicle for precise autonomous navigation in complicated and dynamically changing environments through optimal path planning. Similar to their large vehicle counterparts, the autonomous navigation of microvehicles entails collision-free movement in dynamic environments.”Until now, micro- and nanomachines have been restricted to navigation that uses a closed-loop control system, in which the machines can only move along a predefined path. The new study marks the first demonstration of micromachines that can autonomously navigate complex, dynamically changing environments, such as those with other moving micromachines.The autonomous navigation process consists of three main steps. A CCD camera attached to a microscope takes pictures and sends them to a feature extraction processor, which identifies obstacles and constructs a map of the environment. The map is then sent as input to an Artificial Intelligence (AI) planner, which uses a path-searching algorithm and fuzzy logic approach to determine the shortest collision-free path among multiple possible paths to the destination. The AI planner then sends these travel directions to a magnetic field generator, which orients a magnetic field in such a way as to steer the microvehicle along the collision-free pathway. © 2017 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. Play Microvehicles navigate through mazes. Credit: Li et al. ©2017 American Chemical Society “We want to apply the micro/nanorobotic systems in the field of biomedical operations and nanoscale manipulation,” Li said.In the future, the scientists plan to develop more sophisticated autonomous microvehicles, with features such as autonomous braking, “cruise” control, lane-keeping, and the ability to interact with the environment. Explore furtherlast_img read more

Study suggests proactive policing may do more harm than good

first_img Citation: Study suggests proactive policing may do more harm than good (2017, September 26) retrieved 18 August 2019 from https://phys.org/news/2017-09-proactive-policing-good.html © 2017 Phys.org Explore further When should the police use confrontational tactics? Journal information: Nature Human Behaviour More information: Christopher M. Sullivan et al. Evidence that curtailing proactive policing can reduce major crime, Nature Human Behaviour (2017). DOI: 10.1038/s41562-017-0211-5AbstractGovernments employ police to prevent criminal acts. But it remains in dispute whether high rates of police stops, criminal summonses and aggressive low-level arrests reduce serious crime. Police officers target their efforts at areas where crime is anticipated and/or where they expect enforcement will be most effective. Simultaneously, citizens decide to comply with the law or commit crime partly on the basis of police deployment and enforcement strategies. In other words, policing and crime are endogenous to unobservable strategic interaction, which frustrates causal analysis. Here, we resolve these challenges and present evidence that proactive policing—which involves systematic and aggressive enforcement of low-level violations—is positively related to reports of major crime. We examine a political shock that caused the New York Police Department (NYPD) to effectively halt proactive policing in late 2014 and early 2015. Analysing several years of unique data obtained from the NYPD, we find that civilian complaints of major crimes (such as burglary, felony assault and grand larceny) decreased during and shortly after sharp reductions in proactive policing. The results challenge prevailing scholarship as well as conventional wisdom on authority and legal compliance, as they imply that aggressively enforcing minor legal statutes incites more severe criminal acts.center_img (Phys.org)—A pair of researchers, one with Louisiana State University, the other the University of Michigan has conducted a study on the benefits of proactive policing and have found an example where removing it appeared to lower crime rates. In their paper published in the journal Nature Human Behavior, Christopher Sullivan and Zachary O’Keeffe outline their crime data analysis for a time period when proactive policing was halted and describe what they found. David Weisburd with George Mason University offers a short history of studies done on proactive policing in the same journal issue and compares them with what the researchers in this new effort found. Credit: CC0 Public Domain Most people know that the bulk of crime in industrialized countries occurs in areas where poor people live and that more often than not, such areas have a high population of minorities. Because of that, police departments have focused a large share of their resources on such areas. In recent times, police have adopted a practice called proactive policing in which they engage heavily with people in their jurisdiction—stopping people, asking questions, making arrests for minor offenses, etc. The aim is to prevent serious crime, rather than arrest or prosecute after the fact—but some have accused the police of targeting minorities. Studies indicate, Weisburd notes, that such tactics do help reduce crime rates. But in this new effort, the researchers have found an example where the opposite was true.To learn more about the possible benefits of proactive policing, the researchers studied New York City crime data for the period 2013 to 2016 and then specifically during a seven-week period in late 2014 and early 2015. The latter period followed protests regarding police brutality leading to the death of Eric Garner. During those seven weeks, all proactive policing was halted.In studying the data, the researchers found that reports of serious crimes, such as murder and robbery fell by 3 to 6 percent during the lull. This, they suggest, offers evidence that proactive policing not only does not prevent crime, it actually causes more crime. It is possible, they suggest, that citizens living in areas that are heavily policed grow angry at being targeted and thus feel justified in breaking the law. 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

Want To Stifle Your Teams Creativity Do These Things

first_imgThe slate of companies going public this year— Pinterest, Slack Technologies, and Uber, to name a few—should silence anyone who doubts the power of a bold idea. Amabile, who is the Baker Foundation Professor and Edsel Bryant Ford Professor of Business Administration, Emerita, reflected on her research and its impact in an essay in Perspectives on Psychological Science, Educating Leaders Who Make a Difference in the World (pdf). More recently, she discussed how artificial intelligence might enable creative breakthroughs in an Academy of Management Discoveries article, Creativity, Artificial Intelligence, and a World of Surprises. Read the whole story: Forbes After all, one seemingly crazy brainstorm can up end an entire industry, keeping innovation top of mind for every executive. Fortunately, you don’t need to be a coding genius in a dorm room to birth a breakthrough, says Harvard Business School Professor Teresa M. Amabile, who has studied the interplay between creativity, productivity, and innovation for more than four decades.last_img read more

Poll Nearly 1 in 5 Americans Says Pain Often

first_img by NPR News Scott Hensley 8.21.19 2:10pm At some point nearly everyone has to deal with pain. How do Americans experience and cope with pain that makes everyday life harder? We asked in the latest NPR-IBM Watson Health Poll. First, we wanted to know how often pain interferes with people’s ability to work, go to school or engage in other activities. Overall, 18% of Americans say that’s often a problem for them. Almost a quarter – 24% — say it’s sometimes the case. The degree to which pain is a problem varies by age, with 22% of people 65 and older saying pain interferes often with their daily lives compared with only about 9% of people 35 and younger.Once pain strikes, how do people deal with it?The poll found that 63% of people had sought care for their pain and 37% hadn’t. Younger people were less likely to have pursued care.The most common approach is an over-the-counter pain reliever. Sixty percent of people said that is something they do. Another popular choice, particularly among younger people, is exercise, including stretching and yoga. Forty percent of those under 35 say exercise is a way they seek relief. Only 11% of people 65 and older say exercise is something they try for pain. Overall, 26% of people see exercise as helpful for their pain.That level of exercise is “really exciting to see,” says Brett Snodgrass, a nurse practitioner and clinical coordinator of palliative medicine at Baptist Hospitals in Memphis, Tenn. In her experience, not nearly as many people were doing that, even a few years ago. She says a decline in opioid prescribing could be part of the reason for the change. “Often prescribers were settling for prescriptions,” she says of health care providers’ longstanding approach. “Now that there’s less prescribing, patients are having to take more responsibility” for managing their pain, she says.But options such as exercise and physical therapy are easier to access for people with higher incomes. Snodgrass points to the poll’s finding that only 15% of people whose income was less than $25,000 a year cite exercise as a way they relieve pain. By comparison, about a third of people making $50,000 or more annually say it’s one way they deal with it.About 15% of Americans do turn to a prescription medicine to help get relief. People 35 and under were least likely to get a prescription drug for pain – only 3%. Older people, those 65 and older, were most likely to make use of a prescription medicine, with 23% opting for that approach.In terms of treatment, pain needs to be viewed holistically, so that reliance on medicines alone doesn’t drive decisions. “If we don’t pay attention to pain as a public health issue, I think we’re going to be addressing half of the problem and causing another problem,” says Dr. Anil Jain, vice president and chief health information officer at IBM Watson Health.In light of the efforts to reduce opioid use, we asked if people who are taking opioids for pain are concerned about becoming addicted: 16% said yes; 84% said no. A little more than a third of people taking opioids said they were worried about losing access to opioids compared with about two-thirds who aren’t. The nationwide poll surveyed 3,004 people during the first half of March. The margin of error is +/- 1.8 percentage points.You can find the full results here.Copyright 2019 NPR. To see more, visit NPR. Daniel Grill Poll: Nearly 1 in 5 Americans Says Pain Often Interferes… last_img read more

A civil spar with words

first_imgAre you among those who enjoy a really interesting volley of arguments that we call debates in the modern world? Then we would suggest you head for this debate that is being organised in the city by the Debating Society of India (DSOI), in association with the Debating Society of Pakistan. The aim of the debate is noble. Eminent members of the civil societies of both countries would get together and argue. The topic? Engagement between members of civil society is by far the most important factor in promoting a lasting peace between India and Pakistan. The arguments will be moderated by author-politician Shashi Tharoor. Also Read – ‘Playing Jojo was emotionally exhausting’Those representing Pakistan will be — Javed Jabbar, former minister of information and broadcasting; political commentator Najam Sethi; lawyer Salman Raja among others.India will be represented by MP Mani Shankar Aiyar, actor Kabir Bedi, ex-foreign secretary Salman Haidar among others. The debate will provide insights into the role and relative importance of these constituent groups in shaping the India-Pakistan peace dynamic. The format of the debate remains traditional — with speakers on either side of the proposition speaking for a set period, followed by a question and answer interaction with the audience. Also Read – Leslie doing new comedy special with NetflixA most interesting feature of the format for the debate is that it will not be a traditional adversarial India versus Pakistan debate. Instead, the teams supporting either side of the proposition will be made up of two Indians and two Pakistanis. This approach is likely to promote a more holistic approach to the issue under debate. Hear them out.DETAILAt: Taj Palace Hotel, Sardar Patel Marg  When: 10 January Timings: 6.30 pmlast_img read more

Sadhana End of an era of style versatility and panache

first_imgAccredited as one of the most stylish actress of Bollywood in the late 1960s and 1970s, especially known for her “fringe hairstlye”, the reign of Sadhana Shivdesani, popularly known as Sadhana, will remain unmatched and motivational in the Indian entertainment industry.Sadhana passed away on Friday morning in Mumbai after a long battle with cancer, a family friend said. She was 74 and a widow, and is survived by her foster daughter. “Sadhana breathed her last at her home this morning,” said a close friend and BJP city spokesperson Shaina N.C. She joined filmdom as a child artiste in 1955 with a minor appearance in veteran actor-filmmaker Raj Kapoor’s film Shree 420 in which she played a cameo role in the song Mud mud ke na dekh. Also Read – A fresh blend of fameLater on, in 1958, she acted in India’s first Sindhi language film Abaana playing a pivotal role, on a token payment of Re.1. When a promotional image of the movie appeared on the cover of a film magazine, it was noticed by a prominent producer, Sashadhar Mukherjee, and she joined his acting school afterwards. Amongst her highly appreciated works include Parakh, Hum Dono, Ek Musafir, Ek Hasina, Asli Naqli, Mere Mehboob (her first colour movie), Woh Kaun Thi, Rajkumar, Waqt, Aarzoo, Mera Saaya, Gaban, Ek Phool, Do Mali among many others.  Also Read – Martin Freeman confirms ‘Black Panther’ returnSadhana even tried her hands in directions with 1972 film Geeta Mera Naam. She is credited with introducing the famous “fringe” haircut – known as her trademark “Sadhana Cut” – and tight body-hugging churidar-kurtas as a much-copied fashion in Bollywood. Her look was inspired from Hollywood icon Audrey Hepburn. She voluntarily retired from Bollywood in 1994. Amongst her last major public appearances, Sadhana along with her relative and actor Randhir Kapoor walked the ramp at a fashion show in May 2014 to support the cause of cancer and AIDS patients.While her death undoubtedly can be considered as a big loss for the entertainment industry, many Bollywood stars including Lata Mangeshkar, Rishi Kapoor, Anupam Kher, Karan Johar and Anushka Sharma have mourned her tragic demise while sharing their feelings on micro-blogging site Twitter.last_img read more

City to pay tribute to Kathak queen Sitara Devi

first_imgFew of us know that Kathak queen Sitara Devi had a very close connection with Bengal. She was born and brought up in Kolkata. Straddling the world of films and classical dance with equal elan, she also trained Bollywood heroines like Madhubala, Jaya Bhaduri, Kajol and Rani Mukerji during her lifetime. At very tender age, Sitara Devi got a chance to perform in front of Gurudev Rabindranath Tagore in Shantiniketan. After watching her performance, Tagore offered her some gifts while she requested for something which was eternal, his blessings. Finally Tagore blessed her with the title Nrityasamragini – Empress of Dance. Sitara Devi was only 16 years old back then. Also Read – Add new books to your shelfShe was recruited into the film industry early but she quit after a few films as she wanted to pursue her career as a Kathak exponent on stage. She made her film debut with Usha Haran in 1940 and went on appearing in films like Roti, Anjali, Mother India and so on. She performed at the Royal Albert Hall, got the Sangeet Natak Akademi Award, Padma Shree, Kalidas Samman but she refused to take Padma Bhusan as she once said, “Is this government not aware of my contribution to Kathak? I will not accept any award less than Bharat Ratna.” Also Read – Over 2 hours screen time daily will make your kids impulsiveOn the occasion of her death anniversary on December 24, Kalindi Darpan Socio-Cultural Organisation is all set to organise Smaran 2016,  remembering her. “She was very fond of Bengal and spoke Bengali fluently. This is the reason why we are holding the event in Kolkata, though Sitara Devi belonged to the Benaras gharana,” said Kathak exponent Vishal Krishna, her grandson. The event will be held at Dum Dum Rabindra Bhawan. Smaran 2016  will feature exponents from Delhi – Amit Khinchi, disciple of Pt Rajendra Gangani (Kathak legend) and Subhi Johri, student of  Pt Jay Kishan Maharaj. But the main performances will be offered by both  artists who are the grandsons of  Sitara Devi – Vishal Krishna and Kushal Krishna (tabla exponent ) from Benaras. Ace dancer Alokananda Roy will be the chief guest at the event.“It’s an honor for us hosting the prestigious event remembering the legend Sitara Devi where her family members are also involved. This is the only festival which is dedicated to the Kathak legend Sitara Devi. We love to promote the rich tradition of Indian classical dance forms among the youth”, said Soumali Ganguly, Secretary, Darpan socio-cultural organisation.last_img read more

A true expression of creativity

first_imgThere are two directions artists can take in their work. Most establish a distinctive, easily recognizable style, and then remain in that groove. But for Shakti Maira, an artist, sculptor and print maker, things are totally different. His work done over a period of time, when brought together, may look more like a group show. The freedom to strike out in new directions is a true expression of his creativity, which could be described as ‘formed resonance’. His materials and styles move with, and respond to, his life journey. Also Read – Add new books to your shelf ‘Formed resonance’ – an exhibition of sculptures in wood and bronze, by Shakti Maira, is a celebration of art which is an intimate engagement between the artist’s mind and hands. In this exhibition, Shakti will present three-dimensional and two-dimensional works that are created through marks and strokes. There are four groups of drawings in this show .A set of ‘Figure Drawings’ , a small suite of ink drawings and paintings titled ‘Mother India and Her Sons’ that Shakti did when the Ramjanmabhoomi-Babri Masjid tensions were roiling in India, saddened by what India’s sons were doing to a pluralistic nation , a few charcoal drawings that celebrate music and singing, and lastly, a recent group of drawings called ‘The Origin of Form’. It will be inaugurated by Krishen Khanna today.last_img read more

Say goodbye to your boring workouts

first_imgIt’s very obvious to get bored with the same old exercises, and the same amount of sets, reps, loads and rest. At this stage, change can prove to be good not only for our mental approach but the overall performance as well. Moreover these exercises won’t be heavy on your pocket and will not take up more than Rs 5000 per month. As suggested by Manmeet Manchanda, Fitness Trainer, Anytime Fitness, switching to ‘Unconventional training exercises’ will not only add life to the monotonous training plan but will give out better results. Below are few of the tips to attain a better physique and healthy body. Also Read – Add new books to your shelfWhether you’re in a workout routine, or your regular elliptical routine is starting to feel stale, certain quirky fitness routines like Pole exercise, Ariel Yoga, Battle ropes and Aqua workout can give sweating it out a whole new meaning.These exercises, combined with proper nutrition, results in a faster transformation. Just a few weeks of consistent exercise and healthy eating will yield you a slimmer and leaner figure. You will be closer to your goals in less time than you ever thought. Also Read – Over 2 hours screen time daily will make your kids impulsiveThe exercises cover different body parts thereby helping you to achieve your fitness goals. For example: Trampoline workout: A solid trampoline workout can effectively train the muscles in your abdominals, legs, thighs, and buttocks.Pole exercise / Dancing: This is effective for all body parts including arms, shoulders, upper back, lower back, core, abdominals, oblique, gluteus, quads, calves, ankles, wrists, forearms – you name it! Pole dancing is one of those incredible activities that literally target your entire body. Ariel yoga: Yoga strengthens core muscles and increases spinal and shoulder flexibility.Boot camp: It helps in toning down core, arms, legs, glutes and back.Battle rope: It works on the muscles in your abs, back, and glutes.Aqua workout: It works on the muscles in core abdominal, lower back, deltoid, shoulder muscles, forearms, upper back muscles glutes and hamstring.As we all are aware that everyone these days is a fitness freak. It is evident that the level of fitness lovers and fitness trainers has increased in the last few years. Apart from the basic traditional pattern of workout, people are more interested to learn or do a different kind of workout to reach a different platform.last_img read more

Abhishek donates 3 months pay to Army

first_imgKolkata: Trinamool Youth Congress president Abhishek Banerjee has decided to contribute three months’ salary for the welfare of armed forces.Banerjee is the first MP is the nation who has come forward to donate his salary to the Army. Banerjee said in a tweet: “I’m contributing three months’ salary as an MP to the concerned funds for the welfare of the armed forces. I know this just a tiny drop in the ocean but with these tiny drops a mighty ocean is made.” Also Read – Bose & Gandhi: More similar than apart, says Sugata BoseWhile addressing a gathering after laying the foundation stone of a proposed bridge over Chorial canal in south 24-Parganas on Monday, Banerjee had said if he had a son he would send him to the armed forces. Banerjee said the time had come for a law which would make it necessary for every household to have a representative in the armed forces. He further said the MPs and MLAs should inspire their children and grandchildren to join the armed forces. Also Read – Rs 13,000 crore investment to provide 2 lakh jobs: MamataBanerjee plans to set up a corpus to create awareness about the nation in young minds to inspire them to be more informed and inclined towards the country’s welfare. “This could be achieved through campaign, seminars and interactive sessions in schools, colleges and other educational institutions,” he suggested. Banerjee also urged for communal peace and harmony. He tweeted: “We must do our bit to maintain communal harmony at this hour of grief. Our jawans keep our borders safe. They sacrifice their lives, so that we can stay safe. Before bullet trains, we need bullet-proof jackets for our jawans. Today is the time, more than ever, to stand by them.”last_img read more

Coloured denims Get the style right

first_imgGet experimental with denims and choose a coloured pair to stand out. But ensure you choose one which flatters your body type and which looks suitable for the place you may be heading to, suggest experts. 4Wear the jeans that flatter your body type. Coloured jeans like normal blue jeans come in various fits – skinny, straight, regular. Choose the one that suits your body type.4Wear a neutral colour on top like white, grey or ecru if you are wearing a bright coloured jeans. Also Read – Add new books to your shelf4If you are wearing a printed shirt or t-shirt, keep it low-key and not too contrasting with the colour of jeans.4Do not dress in a single colour tone from top to bottom4Do not wash coloured jeans in hot water. Also turn them inside out before washing in cold water to preserve the colour and make it last longer.Stylists believe coloured jeans are a great alternative to your usual blue pair and can be dressed up or dressed down to suit the occasion.Along with the pastel shades of yellow, khaki, baby blue and mauve, the shades of wine, plum, rust, burnt orange and deep green are the substitutes of indigo. Also Read – Over 2 hours screen time daily will make your kids impulsiveTips on buying jeans:Good fit: When buying jeans, the first and most important tip is to make a note of your waist size and trouser inseam length. A good jeans should fit securely around your waist, while providing enough ease for you to move around easily in. This is really something you will realise when you slip them on.Colour: Colour plays a key role in this product and selecting the right colour is of most importance. What to pair it with, whether a shirt, polo t-shirt or a casual tee and what will be the occasion – work/office, casual and street, or any other occasion are the questions one needs to answer while looking for colour. Also while selecting the colour, one’s body type and what looks good should be given consideration.Style: When you choose to buy a pair of coloured jeans, it isn’t just about fit, it is also about how the product looks and feels aesthetically. Design and styling plays an important role here. Sometimes, classics with minimal details are the best bet.Quality: To ensure you don’t waste money, make sure you take a good look at the quality of the jeans you are considering to buy. Coloured denims sometimes are not even when dyeing. Check for any uneven and patchy dye stain. You want to look at the seams, pockets, zips and buttons to make sure they are well made and will last a good few years.Fly closure: While trying a pair of jeans , one should always check the fly closure, if it is a zipper or button closure. Zipper is easier to operate and hassle-free while there are chances of its malfunction. Buttons are more durable as fastners but are difficult to close and open on frequent basis. It is a personal choice, and should be taken into consideration while picking your favourite pair of coloured jeans.last_img read more

Reasons behind a nagging backache

first_imgPoor posture at the workplace and a sedentary lifestyle – there are many lifestyle habits that might be ruining your back, and you may not even be realising it. Doctors and health experts share what might be behind that back pain. Smartphone mania: Many people multi-task and talk on the phone while their hands are doing other things. Doing this for a few seconds isn’t going to cause an imbalance in your body, but anything more that that will cause tension on one side of your neck and upper back. This could eventually convert to back pain as well. Also Read – Add new books to your shelfLifting style: Whether it is your pets, children, backpack or handbag, the way you lift has a role to play in your bone health. Incorrect and repetitive heavy lifting not only sprains and causes muscle damage, it cause a multiple of other pathological spinal issues. When lifting heavy objects, ensure that all of the weight does not fall on your spine alone. Diet dilemma: Your eating habits and weight gain – especially the ‘bulging tummy’ puts a lot of stress on lower back. It can cause back pain. A weak core compounds this effect in aggravating low back pain. Reducing dairy products, increasing smoking, soda, caffeine is definitely harmful for your bone health. Also Read – Over 2 hours screen time daily will make your kids impulsiveSpending long hours indoors: The fat under our skin gets converted to precursor of vitamin D when exposed to sunlight. Vitamin D is a bone vitamin responsible for strengthening bones, intervertebral disc and musculoskeletal well being. Modern day lifestyle lacks outdoor activities and thereby majority of population working indoors is deficient in Vitamin D. This results in weakening of bones, early degeneration of discs and lower back pain. Mental stress: Even minor back pains can be increased by mental stress. Inability to sleep at night because of stress does not allow your body to relax properly. This can cause muscle fatigue and back spasms. Smoking effect: People who smoke are more likely to develop chronic low back pain. Smoking has been shown to have adverse effects on the brain pain circuits causing persistent low back pain. Smoking also interferes with the natural healing that body attempts after a back injury. Bad roads and long travel: The human body experiences sudden deceleration and random movements which get concentrated at the spine when a vehicle bumps over a pothole. In people who are having low back pain, this can trigger a new episode of severe pain and spasm which may need prolonged recovery time.last_img read more

Painkillers in pregnancy wont cause asthma in kids

first_imgTaking paracetamol or other painkillers during pregnancy is not responsible for increase in the risk of asthma in children, finds a study of nearly 500,000 women. Although women taking paracetamol during pregnancy are more likely to have children with asthma, painkillers are not the cause of the risk. Rather it could be the result of chronic pain that the women suffer from, say researchers. “Our interpretation of this is that it’s less likely that drugs are responsible for the asthma. It seems another factor that we have not measured is linked to use of these drugs and asthma risk,” said lead author Seif Shaheen, Professor at the Queen Mary University of London. Also Read – Add new books to your shelf”For example, women who are taking prescribed painkillers are likely to suffer from chronic pain,” Shaheen said. The study, published in the European Respiratory Journal, found the risk of asthma in kids was similar when women had been prescribed opioids such, as codeine and tramadol or migraine medication. The increase in risk for asthma at five years of age was 50 per cent for paracetamol, 42 per cent for codeine and 48 per cent for migraine medication. Also Read – Over 2 hours screen time daily will make your kids impulsiveElaborating more on the recently conducted study, Shaheen said, “Severe pain, and the stress that it causes, have profound effects on the body, including on levels of some hormones, and there is evidence for a link between high levels of mothers’ stress in pregnancy and increased risk of asthma in the offspring.” For the study, the team examined 492,999 mothers and their children. They looked at the data on prescriptions for different types of painkillers during pregnancy and compared it with the rate of asthma diagnosis in children. Researchers say results should give women reassurance to take painkillers during pregnancy when prescribed by a doctor, and that managing chronic pain during pregnancy is important.last_img read more

How the Killing Fields of Cambodia Inspired A Nightmare On Elm Street

first_imgHe was arguably the defining horror character of the 1980s. But the real life inspiration behind Freddy Krueger was darker and more disturbing than any of his on screen kills. Written and directed by Wes Craven, the first Nightmare On Elm Street movie hit the big screen in 1984. Its story of teenagers battling in their sleep against a disfigured demon with blades for fingers and a red and green striped sweater caught the public imagination.Wes Craven. Photo by Bob Bekian CC BY-SA 2.0Producers may not have realized it at the time but their efforts gave rise to a full-blown phenomenon. In a 30th anniversary retrospective, Vulture wrote that the flick “helped restore the evil monster … to top billing in fright films” and “spawned eight sequels that, along with the original, grossed a cumulative $370 million”.But where had the central figure of Freddy, played by Robert Englund, come from? In one of the ultimate cases of an artist’s revenge, the name was taken from Craven’s childhood bully.Freddy Krueger as seen during a costume contest at Spooky Empire Ultimate Horror Weekend 2014 in Orlando, Florida. Photo by Sam Howzit CC BY 2.0Meanwhile Krueger’s sinister appearance in the movie was based on the young director watching an old man outside his window.Yet what about the core concept of someone being attacked in their sleep? This struck Craven after he read an article in the LA Times. The piece concerned the Killing Fields, a series of locations in Cambodia where the brutal Khmer Rouge massacred the population in the latter half of the Seventies.Denver, CO, USA – September 12, 2015.A family had arrived in America after fleeing the violence, though the trauma had clearly taken its toll on them. In particular their son was experiencing vivid nightmares, where he was being pursued by some kind of monster.Related Video: Famous Hollywood Actors you never knew fought in WW2:As told to Vulture, Craven said the son “told his parents he was afraid that if he slept, the thing chasing him would get him, so he tried to stay awake for days at a time. When he finally fell asleep, his parents thought this crisis was over. Then they heard screams in the middle of the night. By the time they got to him, he was dead. He died in the middle of a nightmare.”Kumpir restaurant Belgium. Photo by Thomas Quine CC BY 2.0This horrifying incident made a big impression on Craven. Following a bad period in his life — where substance abuse played a part among other issues — he eventually channeled his energies into what became A Nightmare On Elm Street. The rest is screen history.The film famously ends with Freddy coming back after seemingly being destroyed, paving the way for follow ups. Craven wasn’t happy about the idea and wanted a more subtle approach. He didn’t have anything to do with Part 2.Freddy Krueger sweatshirt from the 4th film of the series. Photo by Pollack man34 – CC BY-SA 3.0However he returned to the franchise as a writer for 1987’s Dream Warriors, the third in the sequence. He then made one more stab (or slash) at Freddy in 1994 for Wes Craven’s New Nightmare, which depicted Krueger as a real boogeyman terrorizing the movie cast.The tale that planted the seed of Krueger in Craven’s mind was harrowing and tragic. Despite this, the wisecracking Freddy’s legacy is one of humor and even a sense of nostalgia among people of a certain age. Englund found himself going from terrifying dream invader to pop culture figure.In an interview with the New York Post last year to promote his appearance on The Goldbergs Halloween special, he remarked “In a strange, bizarre way, the Nightmare on Elm Street franchise became a sort of ‘It’s a Wonderful Life’ for Halloween. I get stories from adults who have this memory of their family watching in the middle or late ’80s, having walked home from the video store, popping it in and sending out for pizza. This great nesting experience, cuddling with dad or mom before they passed away, watching and getting scared.”Read another story from us: 5 Classic Horror Movies Inspired by Crazy Real Life EventsIt goes to show that horror is as much about bringing people together as it is keeping them awake at night.last_img read more

WATCH Sharks goalie makes save of the year by catching slap shot

first_imgSan Jose Sharks goalie Martin Jones made what has to be the NHL save of the year in the first period of yesterday’s game against Minnesota.With the Sharks trailing 1-0 in the Jones faced down a hard slap shot that appeared to sneak past him. Strangely, there was no puck in the net.The replay showed that although Jones was beat on the shot, his jersey collar corralled the blast to preserve the tie. The Wild won the game 3-1, but Jones’ shirt collar save is the highlight that will live on in internet glory.You have to see this to believe it:last_img read more

KD will never catch LeBron

first_imgKD will never catch LeBronKevin Durant is generally regarded as the second best player in the NBA, but recent comments throwing shade at LeBron James show his frustration at his inability to overtake him as he stacks titles with the loaded Warriors.In Durant’s mind, he can still surpass LeBron if he wins enough titles, but Colin doesn’t think he’ll ever catch LeBron, regardless of what he does. LeBron will not only crush KD in a statistical comparison when it’s all said and done, but he’s also had a far greater impact on the business of the NBA and has been the unquestioned best player on every team he’s won a title with. Some would argue KD isn’t even the most important player on his own team, and the fact Golden State was already winning without him doesn’t help his case either. Just like some say LeBron is chasing a ghost in MJ, LeBron is Durant’s ghost to chase and one he’ll never catch. Also:– Steelers are always talking about last week’s drama–  KD would be crazy to join the Clippers– Carson Wentz will be back strong after “lost year”– Jimmy G’s failures have brought Brady and Bill back togetherGuests:Nick Wright – Host of FS1’s First Thing’s First; Albert Breer – Senior MMQB NFL Reporter; Rob Parker – FS1 Analyst; Stephen Jackson – NBA Analyst and World Championlast_img read more

That Time Google Almost Bought Tesla for 11 Billion

first_imgApril 21, 2015 Tesla, the $26 billion electric hot-rod powerhouse, is revving up to be one of the hottest automakers in the world. But, like most tech startups, it came this close to stalling out on the rough road to success. And when Tesla almost bottomed out, Elon Musk turned to Google to save it.That was back in March of 2013, when Musk asked his friend and Google co-founder and CEO Larry Page to rescue his struggling luxury car company from bankruptcy, according to a forthcoming book on the billionaire futurist by Bloomberg tech reporter Ashlee Vance. Tesla sales were slumping, rumors of dangerous glitches spread like engine fires and even Musk himself admitted that “The world of mouth on the [Model S] sucked.”  Related: Elon Musk’s Ex-Wife on What She Learned Living With an Extreme Entrepreneurial SuccessTesla needed a hero with big pockets and fast. With only “two weeks worth of cash in [Tesla’s] coffers” left, Musk didn’t pussyfoot around. His asking price was steep. He wanted Google to purchase Tesla for $11 billion — $6 billion for the company and $5 billion in capital for factory development, per an excerpt from Vance’s book published on Bloomberg yesterday. The passage cites two unnamed individuals “familiar with the talks.”  Of course, rescue money wasn’t all Musk wanted. “He also wanted guarantees that Google wouldn’t break up or shut down his company before it produced a third-generation electric car aimed at the mainstream auto market,” the excerpt reads. “He insisted that Page let him run a Google-owned Tesla for eight years, or until it began pumping out such a car. Page accepted the overall proposal and shook on the deal.”Related: Tesla Says It Delivered a Record 10,030 Cars in the First QuarterNegotiations began. Google’s lawyers hashed out the nuts and bolts of the deal. Things were looking good, give or take a few haggling spates between Musk and Page. Meanwhile, Tesla’s sales picked up and its fortunes began to turn in the right direction. Musk’s need for the search giant’s life preserver subsided and the talks of a buyout fizzled, eventually falling apart altogether.Fast forward to today and Google has somewhat adorably driven into the self-driving car race. With a current market cap topping $26 billion and more than 50,000 vehicles on the road worldwide, Tesla is humming along in the sizzling electric vehicle market at a nice clip. Some predict it’s even on track to get scooped up by Apple or General Motors. Page is probably kicking himself for not snatching it up when he had the chance…and Musk might laugh all the way to Mars.Related: Google CEO: This Is Why Dominant Tech Companies Falter This hands-on workshop will give you the tools to authentically connect with an increasingly skeptical online audience. Enroll Now for Freecenter_img Free Workshop | August 28: Get Better Engagement and Build Trust With Customers Now 3 min readlast_img read more