(PhysOrg.com) — During the past several years, researchers have used carbon nanotubes and nanofibers to fabricate a variety of transparent, flexible devices, such as OLEDs, transistors, and solar cells. But the development of transparent and flexible field electron emitters made of these nanomaterials still remains a challenge. In a new study, a team of researchers from Japan and Malaysia has shown that the key to the challenge may lie in the unique geometry of conical nanocarbon structures (CNCSs). In their experiments, the scientists bombarded a nafion substrate with argon ions for 30 seconds at room temperature. The irradiation produced uniformly distributed CNCSs over the entire nafion surface. The scientists measured that individual CNCSs had a base diameter of about 200 nanometers and a length/height of a few hundred nanometers, which is smaller than the wavelength of visible light. Overall, the material’s emission characteristics (its turn-on and threshold fields) were comparable to previous opaque electron emitters.As the researchers explain, the new method of using CNCSs for constructing transparent and flexible field electron emitters has several advantages. The method is simple in that it can be performed at room temperature, doesn’t require a catalyst, and doesn’t risk damaging the substrate. The scientists attribute these advantages to the unique conical geometry of the CNCSs. As a next step, the scientists plan to fabricate a transparent, flexible phosphor material, which is necessary for observing visible light emission and for the future construction of complete FEDs. The researchers predict that the technique could lead to transparent, flexible FEDs that are lightweight and inexpensive.“FED is a kind of flat panel display,” Tanemura explained. “Compared with other types of flat panel displays such as LCDs and electroluminescence displays, FED is advantageous in its brightness and size (a huge size is possible).” He added that transparent, flexible FEDs have great potential for applications including so-called head-up displays and highly intelligent information displays used in the coming ubiquitous world, when computers become thoroughly integrated into our everyday activities. “For example, head-up displays will be used on a curved front glass of vehicles (airplanes, trains, cars, and so on), full-face helmets, spectacles, and so on,” he said. “Usually it is transparent, but various kinds of information, such as maps, customer information, alarms, and security, will be displayed on demand. In the ubiquitous world, displays should be foldable (rollable) and light for mobility. You can enjoy TV, movies, games, communication, and obtain various kinds of information using an unfolded wide screen. Transparent and flexible FEDs make it realistic!” Citation: Conical nanocarbon structures could lead to flexible, transparent field emission displays (2010, March 25) retrieved 18 August 2019 from https://phys.org/news/2010-03-conical-nanocarbon-flexible-transparent-field.html This SEM image shows conical nanocarbon structures (CNCSs) fabricated on a transparent and flexible nafion substrate. Because the CNCSs are smaller than the wavelength of visible light, they have given transparency and flexibility to field electron emission sources for the first time. Image copyright: Pradip Ghosh, et al. ©2010 ACS.
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: E-3POD electric vehicle concept wins the Double Challenge Project (2011, February 9) retrieved 18 August 2019 from https://phys.org/news/2011-02-e-3pod-electric-vehicle-concept.html (PhysOrg.com) — It’s a car. It’s a bike. It’s the winner of the Double Challenge project sponsored by Citroen. It may look like a prop from the move TRON, but in actuality it is an ultra-compact electric vehicle. Somewhere between a motorcycle and a car this vehicle is light, aerodynamically efficient, economical and cheap to build. The project, which was designed by Heikki Juvonen, a masters degree students at London’s Royal College of Art, is called E-3POD Antistatic. Honda Introduces All-New Insight Dedicated Hybrid Concept Vehicle at Paris Motor Show Explore further The bike sets the driver in a large wheel, sans the hub of course, along with two other wheels, which provides for a greater amount of stability than a traditional two-wheeled motorcycle could hope to have. The E-3POD was designed as an entry-level electric vehicle for young professionals and students. It has a specific focus of the daily commute and other short distance trips, as the designer expects that most users would still rely on more traditional fossil fuel based combustion engines for trips of any long distance. At least in the near future. The design in low weight thanks to several features such as the shared suspension for both front wheels, the choice of a scratch resistant plastic in the vehicle canopy, and a rear wheel that doubles as a supportive structural element. Some choices, such as the plastic canopy are only possible because of the electric motors, which produce less vibrations than their gasoline and diesel fueled counterparts.The vehicle also has some unique advantages on road as well. Unlike a motorcycle this design allows for an isolated personal space, and the vehicle can also tilt slightly in order to get a better grip on the road during turns or lane change maneuvers. In addition, the compact size of the vehicle may make parking in crowded urban areas easier, though probably not any less expensive. © 2010 PhysOrg.com Heikki Juvonen, the designer of the E-3POD, in addition to getting the bragging rights of having his design chosen as the best overall design by representatives from Citroën’s Style Centre and Electric Vehicle Development Team, will also receives a six month employment contract to at the PSA Design Centre in Paris, France.
PLCK G287.0+32.9 was detected by ESA’s Planck telescope in 2011. First observations revealed that it is an extremely massive galaxy cluster at redshift of 0.39 with a mass of approximately 1.57 quadrillion solar masses. Subsequent studies of PLCK G287.0+32.9 found a pair of giant radio relics towards this cluster.Radio relics are diffuse, elongated radio sources of synchrotron origin. They occur in the form of spectacular single or double symmetric arcs at the peripheries of galaxy clusters. These sources are believed to originate in acceleration and re-acceleration at merger shocks. Thus, in the case of PLCK G287.0+32.9, radio relics confirmed that it is a merging galaxy cluster.However, the asymmetry of radio relics in PLCK G287.0+32.9 suggests a complex merging scenario. In order to investigate this assumption in detail, dark matter distribution in high resolution was required. Therefore, a team of astronomers led by Kyle Finner of the Yonsei University in Seoul, South Korea, has performed a weak-lensing analysis of the dark matter distribution of this cluster.Finner and his colleagues employed the 8.2m Subaru Telescope in Hawaii and the Hubble Space Telescope (HST) for their observations. They observed PLCK G287.0+32.9 with the Subaru Telescope on February 26, 2014, and with HST on August 3, 2016 and on February 21, 2017.”In this study, we present the first constraints on the mass distribution of PLCK G287.0+32.9 from a weak-lensing analysis of Subaru and HST observations. Our analysis with this new data set provides substantial improvements over the previous weak-lensing study of Gruen et al. (2014),” the paper reads.Subaru and HST observations allowed the researchers to probe the mass distribution of the cluster and to discover its five substructures. PLCK G287.0+32.9 was found to be more massive than previously estimated, as the analysis indicates that it has a mass of approximately 2.04 quadrillion solar masses. The astronomers revealed that the mass of PLCK G287.0+32.9 is dominated by the primary cluster with three of the substructures being about 10 percent of the mass of the primary cluster, while the least massive fifth substructure cannot be considered a galaxy cluster.”Our analysis shows that the mass distribution features four significant substructures that stretch in a northwest to south-east direction. Of the substructures, the primary cluster dominates the weak-lensing signal. This cluster is likely to be undergoing a merger with one (or more) subcluster whose mass is approximately a factor of 10 lower,” the authors wrote in the paper.The researchers hope that future deep HST imaging would provide more details about the substructures of PLCK G287.0+32.9. Explore further 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: Researchers reveal insights into the nature of an extremely massive galaxy cluster (2017, October 23) retrieved 18 August 2019 from https://phys.org/news/2017-10-reveal-insights-nature-extremely-massive.html Radio relic discovered in a low-mass merging galaxy cluster More information: arxiv.org/pdf/1710.02527.pdf © 2017 Phys.org New observations carried out by an international team of astronomers have provided important details about an extremely massive galaxy cluster named PLCK G287.0+32.9. The results of these observations, presented October 6 in a paper published on arXiv.org, reveal insights into the structure and mass distribution of this cluster. Color-composite Subaru image with enhanced radio (green) and X-ray (red) emissions. Radio emissions are from GRMT observations (Bonafede et al. 2014) and X-ray emissions are from XMM-Newton. The overlaid convergence contours (white) peak in the X-ray emitting ICM with the highest contour enveloping the BCG. The mass is distributed along a direction similar to the axis connecting the radio relics. The HST F814W pointing is outlined in light blue. Image Credit: Finner et al., 2017.
Subordinate naked mole-rats and queen’s pups. Credit: PNAS Journal information: Proceedings of the National Academy of Sciences A team of researchers affiliated with several institutions in Japan has found evidence suggesting that female worker naked mole rats become more maternal after consuming their queen’s feces. In their paper published in Proceedings of the National Academy of Sciences, the group describes their study of the unique mammals and what they found. 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. © 2018 Phys.org More information: Akiyuki Watarai et al. Responses to pup vocalizations in subordinate naked mole-rats are induced by estradiol ingested through coprophagy of queen’s feces, Proceedings of the National Academy of Sciences (2018). DOI: 10.1073/pnas.1720530115AbstractNaked mole-rats form eusocial colonies consisting of a single breeding female (the queen), several breeding males, and sexually immature adults (subordinates). Subordinates are cooperative and provide alloparental care by huddling and retrieving pups to the nest. However, the physiological mechanism(s) underlying alloparental behavior of nonbreeders remains undetermined. Here, we examined the response of subordinates to pup voice and the fecal estradiol concentrations of subordinates during the three reproductive periods of the queen, including gestation, postpartum, and nonlactating. Subordinate response to pup voice was observed only during the queen’s postpartum and was preceded by an incremental rise in subordinates’ fecal estradiol concentrations during the queen’s gestation period, which coincided with physiological changes in the queen. We hypothesized that the increased estradiol in the queen’s feces was disseminated to subordinates through coprophagy, which stimulated subordinates’ responses to pup vocalizations. To test this hypothesis, we fed subordinates either fecal pellets from pregnant queens or pellets from nonpregnant queens amended with estradiol for 9 days and examined their response to recorded pup voice. In both treatments, the subordinates exhibited a constant level of response to pup voice during the feeding period but became more responsive 4 days after the feeding period. Thus, we believe that we have identified a previously unknown system of communication in naked mole-rats, in which a hormone released by one individual controls the behavior of another individual and influences the level of responsiveness among subordinate adults to pup vocal signals, thereby contributing to the alloparental pup care by subordinates.
Kolkata: A class 12 boy of Kurseong, West Bengal, was found hanging in a secluded area with words like ‘Illuminati’, ‘hanged man’ and ‘devil’s one eye’ inscribed on the wall, the police said on Thursday. “We received a complaint on Monday that the boy of Saint Mary’s hill area was found hanging. We have seen strange symbols and lines written on the walls of the area where the boy was found and the investigation is going on,” said a police official. Also Read – Rain batters Kolkata, cripples normal life According to the neighbours, the boy and many other young children frequented the area where the mobile network is very strong. “I believe the symbols and words like ‘Illuminati’, ‘devil’s one eye’ inscribed on the wall is linked to some of these online apps or game which targets young people. It provokes the young mind,” said a resident of the area. A teacher of St. Alphonsus School, where the class 12 boy studied, warned parents to be cautious with the online activities of their ward. “We have lost a very bright student of our school. I also heard that another student was taking up some ‘Momo Challenge’. Later he was threatened that his personal data will be downloaded. The students got scared and we have warned everyone to stay away from such cyber games,” he said.
Kolkata: A Jaipur-Kolkata IndiGo flight with 136 passengers on board made an emergency landing in Kolkata after smoke engulfed the plane mid-air, prompting the government to order a probe, an official said Tuesday. However, no passengers were injured in the incident that happened on Monday, a senior DGCA official said. The pilot had to issue a ‘May Day’ call, made to seek help in times of distress, and the the Pratt & Whitney-powered Airbus A320 Neo plane landed at the Kolkata airport under full emergency conditions, a source said. Also Read – Rain batters Kolkata, cripples normal life On landing, some of the passengers were evacuated using emergency chutes, the source said. “The IndiGo aircraft VT ITR was about 45 miles off Kolkata when the smoke engulfed the aircraft. Amid the passengers’ safety in danger, the pilot issued May Day and sought an emergency landing at the Kolkata airport,” the source said. IndiGo confirmed the incident but said the aircraft did not face any technical issue in the past. “An IndiGo flight (A320 aircraft) 6E-237 operating on Jaipur-Kolkata route made an emergency landing as a precaution at Kolkata due to suspected smoke in cabin,” the airline said in a statement. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killed There was no report earlier of any malfunctioning in the aircraft, it said. The flight landed safely at Kolkata, it said, adding that on reaching the bay, a few passengers were evacuated via the “aft exit deployed slides” while most passengers deplaned via the front step ladder. The Airbus A320 Neo planes with Pratt & Whitney engines, which are being operated by budget carriers IndiGo and GoAir, have been frequently facing serious glitches mid-air and on ground since their induction. The senior official of the Directorate General of Civil Aviation (DGCA) said the “flight made an emergency landing at Kolkata due to smoke in cockpit and cabin”. On landing, the aircraft was taken to an isolation bay, where aft or emergency passenger chutes were deployed and few passengers were evacuated, the official said. The Aircraft Accident Investigation Board (AAIB), which comes under the Civil Aviation Ministry, has launched a probe into the incident, he said. The airline has also been asked to submit a preliminary report after a detailed technical inspection, he added.
Kolkata: For the first time in the history of post-Independent Bengal, around 22 national leaders opposing the BJP will address a gathering at the historic Brigade Parade Ground on Saturday afternoon, determining a new course of action for the forthcoming 2019 Lok Sabha elections.Trinamool Congress chief Mamata Banerjee’s dream of setting up an anti-BJP Federal Front is going to take concrete shape at this rally. It was Banerjee who first conceived the idea of this formation and had opened dialogues with all-India leaders from the middle of 2018. She had announced the date of the Brigade Parade Ground rally from the stage of the Martyrs’ Day rally held on July 21, 2018. Also Read – 3 injured, flight, train services hit as rains lash BengalFormer Prime Minister H D Deve Gowda who reached the Netaji Subhas Chandra Bose International Airport on Friday afternoon said: “Madam Mamata Banerjee is trying hard to bring all the Opposition parties under one umbrella. Narendra Modi had attacked Banerjee on the floor of Parliament and outside in very harsh words. People of the country will give him a befitting reply. In my view, the regional parties that have come together and are quite capable to form a stable government. The people of India will select the Prime Minister.” Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedFormer Uttar Pradesh Chief Minister Akhilesh Yadav said: “I congratulate Mamatadi for her efforts. Under the BJP rule, the condition of farmers, small traders and common people have turned from bad to worse.” BJP MP and former Union minister Shatrughan Sinha added: “Mamata Banerjee is no longer a regional leader. She has become a national leader and after the elections, when the Prime Minister will be selected, she is surely going to be a contender.” The entire 7.5 km stretch from the airport to Ultadanga has been decorated with festoons, banners, photos and cut-outs of all the leaders who are coming to attend the rally. Chief Minister Mamata Banerjee paid a visit to the places and called on the leaders. A time travel to the past brings out the rich history of the ground, located in the backdrop of the iconic Victoria Memorial and the Indian Museum, and under the control of the Indian Army whose, Eastern Command headquarters Fort William lie in the vicinity. The Brigade Parade Ground has been a witness to many great events since Independence. In 1955, Russian leaders — Nikita Khrushchev and Nikolai Bulganin — visited Kolkata and addressed a gathering. Indira Gandhi and Sheikh Mujibur Rahman had addressed a gathering in 1972. Jyoti Basu had led a rally in 1989 where all the anti-Congress leaders had gathered. Mamata Banerjee as a youth Congress leader had addressed a rally and sounded a bell to end the CPI(M) rule in 1992. A thick security blanket has been thrown on the sprawling Brigade Parade Ground to prevent any untoward incident. Large-scale preparations have been made to ensure that it is a complete success. Besides the huge stages, 20 watch towers have been erected and 1,000 microphones and 30 LED screens put up. Hundreds of TMC volunteers will be on the grounds to take care of supporters.
SVF, Eastern India’s largest entertainment company, recently, announced the launch of ‘Hoichoi’, the much awaited one-stop digital content platform, which is home to the largest collection of the best in Bengali entertainment. “Hoichoi is the ultimate destination for Bengali entertainment, with something on offer for every Bengali – young or old, movie buff or music lover, student or working professional. We wish to connect with all of them, worldwide, through Hoichoi,” said Vishnu Mohta, co-founder, Hoichoi and Executive Director, SVF. Also Read – Add new books to your shelfHoichoi’s original web series cuts across genres like thriller, drama, horror, romance, comedy; showcasing some of the best acting talent of the Indian entertainment industry, and created by the finest production houses and directorial talent.Shrikant Mohta, co-founder – SVF and Hoichoi said, “We have been entertaining audiences over the last 20 years as storytellers, creators and distributors of the best entertainment content across cinemas and television. With the world moving to mobile, we decided to diversify into digital content with ‘Hoichoi’ and created exclusive content for the same. The creative freedom offered by this space is unparalleled.” Also Read – Over 2 hours screen time daily will make your kids impulsive’Hoichoi’, which means non-stop excitement, is being launched with a strong content portfolio of original web-series, with over 500 Bengali movies and more than 1000 Bengali songs for audio streaming to serve the entertainment needs of Bengali audiences globally. “We strongly believe in the mantra ‘content is king’. With our extensive content library, we are sure our subscribers will be spoilt for choice. We plan to invest substantially to make some of the best and freshest premium content available on ‘Hoichoi’, to cater to Bengalis globally,” Mahendra Soni, co-founder – SVF and ‘Hoichoi’ said. ‘Hoichoi’, powered by ViewLift, the international content distribution platform and Amazon web services, world’s leading cloud computing solution provider, will enable subscribers to stream videos seamlessly. Rediffusion Y&R is the creative agency behind Hoichoi’s visual identity and advertising campaigns.Certain crucial features of the ‘Hoichoi app’ includes content library, AD free seamless viewing experience, multi-device capability, offline download facility, a well-designed user interface, English subtitles, multiple payment options, programmatic search engine to give accurate results, competitive subscription rates as well as the upcomintg kids content and music streaming feature. ‘Hoichoi’ will be rolling out entertaining and edgy original web series spanning across some of the most popular genres on offer. Byomkesh: One of the most celebrated Bengali fictional detective characters, created by Saradindu Bandopadhyay, slips into a much more hands-on avatar in the ‘Byomkesh’ web series by ‘Hoichoi’. It is an amalgamation of six stories divided into three episodes. Set in 1930s, the series is based on the adventures of Byomkesh and his friend and biographer Ajit, who usually accompanies the former during his investigations. Anirban Bhattacharya plays Byomkesh while Subrat Dutta portrays the role of Ajit. Ridhima Ghosh is Satyabati, Byomkesh’s better half. Hello: The thriller stars Raima Sen as Nandita and Joy Sengupta as Ananyo, a happily married couple with two kids. Soon after Ananyo starts having an extra-marital affair with Nina played by Priyanka Sarkar, Nandita’s phone is flooded with numerous MMS-es from an unknown number recording Ananyo’s private moments outside marriage. Nandita becomes obsessed with the curiosity and the mystery grows darker when she begins to find hidden messages in every video. Cartoon: This is a horror show starring Paayel Sarkar as Jiniya and Mainak Banerjee as Aritra, the cartoonist. When Aritra shifts to a new flat he soon realizes that there is something eerie about the house after he experiences some paranormal experiences. As the story progresses, he realizes that it’s not him but the cartoons he has drawn that are bothering the spirit residing in his flat. Dupur Thakurpo: Directed by Debaloy Bhattacharya and starring superstar Swastika Mukherjee as Uma Boudi, this is an adult comedy where Jibon Babu played by Abhijit Guha, brings home a beautiful, young and vivacious bride, Uma. However, he is blissfully oblivious of the trouble likely to brew when he agrees to let out three rooms to six young men on Uma’s insistence. Some not-so-appropriate things start happening. Five of the men are completely enamored by Uma Boudi’s charms, ready to lay down their lives for a smile or a glance from her, while she plays around with them like a fiddle. Holy Faak: This is a dramatic story of how a girl’s grandmother (Ratna Ghoshal) and a boy’s grandfather (Paran Bandhapadhyay) plot to bring back their estranged grandchildren together. The original web series stars Anamika Chakraborty as the girl, Diya and Soumya Mukherji as the boy, Indra. Bouma Detective is a captivating mystery – where a wife dons the hat of a sleuth and is on a mission to save her superstar husband, prime suspect in a murder case, by finding the actual murderer. The impressive cast includes Rohit Roy as Ronojoy and Aparajita Auddy as Rohini.
Kolkata: Around 70 lakh people will exercise their franchise in five Lok Sabha constituencies spread over three districts on Tuesday.These seats include Jangipur and Murshidabad in Murshidabad district, Malda North and South in Malda district and Balurghat in South Dinajpur district. The Election Commission has taken elaborate measures to ensure free, fair and peaceful election in these constituencies. A total of 324 company of the Central Forces will be deployed. Of these, 177 company of the Central Forces will be deployed in Jangipur and Murshidabad seats. In Malda North and South, 94 company of Central Forces will be in place while in Balurghat another 44 will be pressed into service. Also Read – Rs 13,000 crore investment to provide 2 lakh jobs: MamataThe Election Commission replaced the Superintendent of Police Arnab Roy with Ajay Prasad just 48 hours before the polls in Malda. A Congress delegation met Prasad on Monday afternoon and urged him to ensure free and fair elections. In Murshidabad, there are 1,907 polling booths which are being housed in 1,377 polling premises. In Jangipur, there are 1,762 booths within 1,148 polling stations. In Malda North, there are 1,713 booths housed in 1,320 premises while in Malda South, around 1,616 booths are housed in 1,106 premises. In Balurghat, there are 1,530 booths housed in 1,345 premises. The seats are most crucial for the Trinamool Congress. Of the five seats, TMC had only one seat in 2014 Lok Sabha polls. It went up to two after Mausam Noor joined the TMC and is fighting from Malda North. TMC’s Arpita Ghosh won by 1.06 lakh votes in 2014 while Mausam defeated her nearest candidate by over 67,000 votes. Also Read – Lightning kills 8, injures 16 in statePolitical experts said Malda is a Congress stronghold for the past five decades since the time of ABA Ghani Khan Chowdhury. Ghani Khan’s brother AHA Khan Chowdhury won the Malda South seat by over 1.64 lakh votes in 2014. In Murshidabad district, Abhijit Mukherjee was elected from Jangipur seat by over 8,000 votes. Badaruddoza Khan of the CPI(M) was elected from Murshidabad by over 18,000 votes. Even in the 2016 Assembly elections, two ministers of the TMC — Sabitri Mitra and Krishnendu Narayan Chowdhury were defeated. But in 2018 Panchayat elections, Trinamool won the Zilla Parishad. Banerjee is trying to make inroads in Malda and joining of Noor is a major achievement of the party before the elections. Like Malda, Murshidabad is a Congress stronghold and the TMC had lost all the three seats in 2014. Adhir Chowdhury won the Berhampur seat while Abhijit Mukherjee and Badaruddoza Khan got elected in 2014. TMC supremo Mamata Banerjee deputed Suvendu Adhikari, state Transport minister, to look after the party’s organisation in the district. The decision has brought enormous success for the party. In 2018, Trinamool got control over the Zilla Parishad and three MLAs have joined the party. Political experts said a tough tussle is expected in all the five seats and people will have to wait till May 23 to know the result as the strength of Congress and TMC is evenly poised in Malda and Murshidabad respectively.