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. Waze turning road warriors into map builders Citation: Data from savvy cabbies to help improve online mapping (2010, November 8) retrieved 18 August 2019 from https://phys.org/news/2010-11-savvy-cabbies-online.html Microsoft Research Asia engineers are analyzing three months’ worth of data from GPS units installed in more than 33,000 taxi cabs in Beijing in the hope of identifying the short cuts and side streets frequented by drivers who know the best routes to take at any given time. To do the analysis, they designed a software program dubbed “T-Drive” to merge with satellite map information. Team leader Yu Zheng says the system outperforms the estimates provided by online mappers such as Google, Mapquest, and Bing, which use data on speed limits and the length of the road. These mapping systems can rarely help drivers select short cuts or routes around traffic light delays or jams.Over 60 percent of T-Drive’s routes were faster than those provided by Google or Bing, and at least half of these results were 20 percent faster or better, giving an overall saving of 16 percent off the duration of the trip. This is equivalent to shaving an average of five minutes off per 30 minutes of traveling. A web-based user interface of T-Drive. Image credit: Microsoft Research. Explore further So far the system applies only to Beijing and does not yet include real-time data such as information on accidents or other hazards, but the system should eventually be real-time and applicable to any city with a large number of taxis on the road. Other systems are also being worked on, including a collaborative approach by Nokia and the University of California, which uses GPS information from motorists’ mobile phones. Another system, from Silicon Valley company, Waze, allows drivers to share their real-time routes with online social networks to help other drivers adjust their routes to the current traffic conditions. Waze co-founder, Ehud Shabtai, said the Beijing approach makes sense, saying “you can probably assume routes taxi drivers take are more optimal,” and the best short cuts may not be known to less savvy drivers. Faster routes are also not always the shortest on the map, he said.The T-Drive findings are being presented this week in San Jose, California at the International Conference on Advances in Geographic Information Systems. — T-Drive: research.microsoft.com/apps/pu … fault.aspx?id=138985– IEEE research paper (PDF): research.microsoft.com/pubs/13 … driver-demo-IEEE.pdf Application scenario of T-Drive. Image credit: Yu Zheng, Microsoft research (PhysOrg.com) — Microsoft is planning to tap into the intimate knowledge taxi drivers have of their cities to improve their online mapping systems and help drivers navigate to their destinations faster. More information: © 2010 PhysOrg.com
Month: August 2019
El Niño, is of course, a non-seasonal change of weather patterns in different parts of the world—all connected to a change in upper sea level temperatures along the equator. Warm water from below is pushed up, causing sea temperatures near the surface to be abnormally high as it moves towards the Americas. The result is generally more rainfall on the western coasts of North and South America as trade winds carry the moisture to land and droughts in other places such as Australia and Indonesia. By deploying an array of floating temperature sensors throughout the pertinent part of the ocean, scientists have been able to predict with a high degree of accuracy when an El Niño will occur—for up to six months. In this new effort, the researchers claim that using only atmospheric air temperature readings above the Pacific and the Equator, they are able to predict an El Niño up to a year in advance.The new technique is based on data and analysis of patterns that link air temperatures over the ocean at the equator with temperatures over the rest of the Pacific Ocean. Their analysis showed that when the two temperature readings are closely linked, the odds of an El Niño go up—enough to allow for relative percentages to be calculated. Their data shows, they say, that that for the year coming up, 2014-2015, there is a 75 percent chance of an El Niño occurring.Other researchers thus far aren’t as confident of the team’s results—they suggest that the limited amount of data the researchers had available to them means their predictions are premature. Others contend that it’s just not possible to predict such a complicated weather event using such a simplistic approach. For this coming year, it may not matter, as most other climatologist using conventional methods are also predicting this will be an El Niño year as well. (Phys.org) —An international team of researchers has ignited a controversy over their claim to be able to predict El Niño up to a year in advance. In their paper published in Proceedings of the National Academy of Sciences, the team claims their method, which relies solely on atmospheric temperature readings, accurately predicted the last two El Niño years. Journal information: Proceedings of the National Academy of Sciences Explore further Citation: Researchers suggest controversial approach to forecasting El Nino (2014, February 11) retrieved 18 August 2019 from https://phys.org/news/2014-02-controversial-approach-el-nino.html More information: Very early warning of next El Niño, Josef Ludescher, DOI: 10.1073/pnas.1323058111AbstractThe most important driver of climate variability is the El Niño Southern Oscillation, which can trigger disasters in various parts of the globe. Despite its importance, conventional forecasting is still limited to 6 mo ahead. Recently, we developed an approach based on network analysis, which allows projection of an El Niño event about 1 y ahead. Here we show that our method correctly predicted the absence of El Niño events in 2012 and 2013 and now announce that our approach indicated (in September 2013 already) the return of El Niño in late 2014 with a 3-in-4 likelihood. We also discuss the relevance of the next El Niño to the question of global warming and the present hiatus in the global mean surface temperature. © 2014 Phys.org The 1997 El Nino seen by TOPEX/Poseidon. Credit: NASA Weak El Nino possible by mid-2014, WMO says 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.
Left: OGLE-2014-SN-131 (blue circle) in a VLT acquisition image taken with an R−special filter on November 29.1, 2014 (JD 2456990.08). Right: NTT image from August 1.2, 2016 (JD 2457601.74), showing no visible host at the SN location. Credit: Karamehmetoglu et al., 2017. (Phys.org)—An international team of astronomers has detected a new slowly evolving Type Ibn supernova as part of the Optical Gravitational Lensing Experiment (OGLE). The new event, designated OGLE-2014-SN-131, has the longest rise time ever observed in Type Ibn supernovae. The discovery is described in a paper published Mar. 23 on the arXiv pre-print server. Type Ibn supernovae are explosions whose spectra are characterized by low-velocity helium emission lines. They are thought to be the core-collapse explosions of massive stars whose ejecta interact with helium-rich circumstellar material. They have also relatively high peak luminosities and are blue at peak.Type Ibn supernovae are usually fast evolving with a short rise to peak brightness (less than two weeks) and a subsequent fast decline. However, a group of researchers led by Emir Karamehmetoglu of the Stockholm University in Sweden has found a new Type Ibn supernova that exhibits an unprecedentedly long rise time and a much broader light curve compared to other supernovae in this class.Karamehmetoglu’s team discovered OGLE-2014-SN-131 on November 11, 2014 using the OGLE-IV Transient Detection System. Afterward, the researchers conducted follow-up photometric observations of this supernova with the OGLE telescope at the Las Campanas Observatory in Chile and with the Gamma-Ray Burst Optical/Near-Infrared Detector (GROND) mounted on the 2.2m MPG/ESO telescope at La Silla, also in Chile. Moreover, they performed spectroscopic observations of OGLE-2014-SN-131 with the ESO New Technology Telescope (NTT) at La Silla and with the Very Large Telescope (VLT) at Cerro Paranal in Chile.These observations show that OGLE-2014-SN-131 spectroscopically resembles other Type Ibn supernovae such as SN 2010al and showcases also peak luminosity and post-peak colors similar to other events in this class. Notably, however, the light curve of OGLE-2014-SN-131 is broader and longer-rising than any other Type Ibn supernova.”Spectroscopy and multi-band photometry of OGLE14-131 have been presented. Identification of prominent He I emission lines classifies this SN as a Type Ibn. While, spectroscopically, OGLE14-131 is identified as a normal SN Ibn, when compared to other Type Ibn SNe, its broad light curve shows the longest rise time ever observed for this SN class,” the authors write.The researchers try to explain this record-long rise time, noting that it requires higher ejecta and circumstellar material masses for the progenitor when compared to typical supernova Ibn progenitors. Therefore, they concluded that the most likely progenitor scenario for OGLE-2014-SN-131 is a massive Wolf–Rayet star.”To explain the unusually long rise time, the broad light curve, the light curve decline, and the spectra characterized by narrow emission lines, we favor a powering mechanism where the SN ejecta are interacting with a dense curcumstellar material. The progenitor of OGLE-2014-SN-131 was likely a Wolf-Rayet star with a mass greater than that of a typical SN Ibn progenitor, which expelled the circumstellar material that the SN is interacting with,” the team wrote in the paper.The astronomers added that given the fact that OGLE-2014-SN-131 has an unusually massive progenitor for a Type Ibn supernova, we should expect a low number of similar slowly evolving events as such massive stars should be relatively rare. Astronomers discover new gas giant exoplanet More information: OGLE-2014-SN-131: A long-rising Type Ibn supernova from a massive progenitor, arXiv:1703.08222 [astro-ph.HE] arxiv.org/abs/1703.08222AbstractType Ibn supernovae (SNe Ibn) are thought to be the core-collapse explosions of massive stars whose ejecta interact with He-rich circumstellar material (CSM). We report the discovery of a SN Ibn, with the longest rise-time ever observed, OGLE-2014-SN-131. We discuss the potential powering mechanisms and the progenitor nature of this peculiar stripped-envelope (SE), circumstellar-interacting SN. Optical photometry and spectroscopy were obtained with multiple telescopes including VLT, NTT, and GROND. We compare light curves and spectra with those of other known SNe Ibn and Ibc. CSM velocities are derived from the spectral analysis. The SN light curve is modeled under different assumptions about its powering mechanism (56Ni decay, CSM-interaction, magnetar) in order to estimate the SN progenitor parameters. OGLE-2014-SN-131 spectroscopically resembles SNe Ibn such as SN 2010al. Its peak luminosity and post-peak colors are also similar to those of other SNe Ibn. However, it shows an unprecedentedly long rise-time and a much broader light curve compared to other SNe Ibn. Its bolometric light curve can be reproduced by magnetar and CSM-interaction models, but not by a 56Ni-decay powering model. To explain the unusually long rise-time, the broad light curve, the light curve decline, and the spectra characterized by narrow emission lines, we favor a powering mechanism where the SN ejecta are interacting with a dense CSM. The progenitor of OGLE-2014-SN-131 was likely a Wolf-Rayet star with a mass greater than that of a typical SN Ibn progenitor, which expelled the CSM that the SN is interacting with. Citation: New slowly evolving Type Ibn supernova discovered (2017, April 3) retrieved 18 August 2019 from https://phys.org/news/2017-04-slowly-evolving-ibn-supernova.html © 2017 Phys.org 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.
© 2018 Science X Network Journal information: Antiquity This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. More information: Lautaro Núñez et al. Tulán-52: a Late Archaic ceremonial centre at the dawn of the Neolithisation process in the Atacama Desert, Antiquity (2018). DOI: 10.15184/aqy.2018.195 Credit: Antiquity (2018). DOI: 10.15184/aqy.2018.195 Archeologists unearth 3,300 year old complex in Israel Citation: Reinterpretation of Tulán-52 excavation suggests social complexity among late hunter-gatherers (2018, November 9) retrieved 18 August 2019 from https://phys.org/news/2018-11-reinterpretation-tuln-excavation-social-complexity.html Explore further In this new effort, Núñez and Perlès have revisited two stone complexes excavated in the Atacama Desert in Chile. Both were built by Neolithic people thousands of years ago. One site, called Tulán-54 is believed to be older than the second—perhaps as old as 5000 years. The second site, named Tulán-52 is believed to have been used from approximately 1110-900 BC until 550-360 BC. Excavation for the first was completed in 1985—the second was finished in 2015. After much study, researchers working on the excavations concluded that the complexes were semi-sedentary settlements—people both lived in them and used them for ceremonies. In this new effort, the researchers suggest that neither site was ever used as a place to live. They note that both complexes show many signs of being used for rituals but lack signs of settlement. Gold-plated vulture heads have been found, for example, along with mortars and grinding slabs that were used to prepare pigments, and plants that contain hallucinogens. Also, the remains of more than two dozen infants were found.In studying the complexes and the artifacts, the researchers found more similarities between the two than found in prior studies—similarities that suggested more complexity than had been realized before. They suggest that the layout of Tulán-54 and its artifacts indicate that the site was like a fully developed ceremonial center. The way the stones were used to build the complex is one example suggesting a massive concerted effort.The researchers also suggest that innovations that occurred in the second site, such as using camelids to carry material to the site, the use of farming to feed the people, and plant processing to produce hallucinogen effects and metallurgy, all point to a ceremonial purpose—though they suggest it is still not clear what the ceremonies were for. A pair of researchers has found evidence at the Tulán-52 excavation in Chile that suggests the need for a reinterpretation of how the stone complex was used. In their paper published in the journal Antiquity, Lautaro Núñez with Universidad Católica del Norte and Catherine Perlès with Allée de l’Université, suggest the new evidence shows more social complexity among the later hunter-gatherers who built and used the complex than previously thought.
A pen is mightier than the sword, and who would agree more than Amit Dahiyabadshah, ideator of the movement called Delhi Poetree Association which encourages and nurtures all budding poets across different walks of life.‘DelhiPoetree is a movement with three measurable objectives apart from the love for poetry- First to promote the hosting of 30 poetry readings across the National Capital region of Delhi every month. Second, to honour 100 contemporary poets as the living treasure of Delhi and to obtain this honour from the government, society at large and the local community of the poet including his/her neighbourhood and to facilitate 100 poets to earn a taxable income from poetry alone by the year 2018,’ says Amit. Also Read – ‘Playing Jojo was emotionally exhausting’Divided into two major parts called Dilli Kavita Kumbh and The Thousand Poets Reading, the association believes that poetry can save society and revive the sense of community.‘Many people mistakenly call Delhi Poetree a club or a group. It isn’t some society, it’s a movement aimed to bring about a revolution through words and not blood,’ he adds.Speaking about its reach, Delhi Poetree is widely recognised and respected as the most active poetry movement now. Its regular well organised readings feature poets in the age groups 6 to 93 and so does its audience that gathers regularly to witness a wide range of poetry for all age groups. Also Read – Leslie doing new comedy special with NetflixDelhi Poetree has featured over 1300 poets in the last 9 years since its advent in 2003 and is touted as the biggest poetry event of its kind now.‘We are looking for original talent in the city. Everyone is welcome to visit and read out their poetry. Refine the crude and rootless population of the city, identify and edify their latent poetic talent and, finally, help them get published and sold. Besides the fact that there is no other open platform for original poetry in Delhi, the Poetree also brings together enthusiasts and gives everyone a chance to shine,’ Dahiyabadshah says. Agrees Manu Sharma, a regular at such events: ‘Poetry is the next big thing and forums like these give a platform for like minded people to reconnect and share their thoughts.’‘I narrated a self creation titled ‘Suno Krantiveer’ which was a satire on three most well known aspects of life which are abused the most- love, religion and revolution.Today everyone wishes to revolutionise the world, be it the Kejriwals or the Moists. But deep down no one really cares for the universal good rather have their own vested interests mostly about aquiring power. My poetry intends to aware people and educate rather than titillate,’ Manu signs off.
Life is a vast array of colours that present an aura of emotions expressed in various artistic forms, but it is only imagination and innovation that drives artists to present this in ways that often perplex the common viewer.And when artists with different ways of looking at their environs come together, the result will be something that will be pleasing to the eye and satisfying to the soul.The exhibition which will continue till 9 March is a group show of established and upcoming artists, exhibiting a harmonious blend of contemporary and modern styles of paintings. Also Read – ‘Playing Jojo was emotionally exhausting’The foray has canvases with an array of colours and an aura of various artworks combined with emotions expressing each artist’s mindset and a certain theme that he or she wants to share with the discerning viewer.The curator of the exhibition, Savita Agarwal says that the artist’s vision, perception, imagination and depiction of his thought process is depicted with such clarity that life is infused in the art and it speaks for itself and takes the viewer into the soul of the painting.The moods and moments of the work depend on the artists’ state of mind at the particular point of time he is depicting with his brush and colours.This one’s for the art lovers so head over and make sure you get a look into the magic the 13 have created.WHEN: On till 9 MarchWHERE: Epicentre, Sector 44 Gurgaon
In a bid to expand the market for Children’s film and encourage talent in the country, Children’s Film Society India (CFSI) has announced the launch of a three day National children’s film festival (NCFF) for the first time ever. The move comes close on the heels of the Prime Minister, Narendra Modi’s cleanliness drive announcement and in keeping with his vision, the CFSI has announced the central theme of the festival as ‘Swachhta’. The NCFF, the event will focus on Children’s films which are either made or shot in India or the makers are Indian. The festival will kick-start at the capital’s Siri fort Auditorium from 14 November, Children’s Day and will conclude on 16 November 2014. Also Read – ‘Playing Jojo was emotionally exhausting’The festival will screen a score of unreleased films with CFSI’s production and latest offering, Pappu Ki Pugdandi leading the pack. Other fresh content that will be put up in the festival are Shortcut Safari which will be premiered for the first time The Goal, Mahek Mirza , EkAjooba- are yet another CFSI production, Kummati, Krish Trish and Baltiboy-3 are few curated movies amongst others. The films are carefully handpicked to create an opportunity for children to experience qualitative content made exclusively for them. Some of these films have won several awards, globally.NCFF has garnered eyeballs from the country’s celebrated Bollywood personalities such as Amitabh Bachchan, Ajay Devgn and Sonakshi Sinha, who have culled out time from their busy schedule to wish CFSI and NCFF through video bytes. Sania Mirza is the Guest of honour and celebrities such as Jimmy Shergill and Shaimak Davar team will participate in cultural programmes and workshops.
The countdown has begun. The Kolkata Book Fair which is said to be Asia’s largest book fair and witnesses the highest footfall returns with its 39th edition scheduled from January 29 till February 8 at Milan Mela in Kolkata as announced at a press conference held in the nation capital.Commemorating the 450th birth anniversary of William Shakespeare and Dylan Thomas’s birth centenary, separate pavilions are being made that will feature the works of the two legendary authors. The fair will also mark works of W B Yeats, Bengali author Suniti Chatterji and actor-director Sombhu Mitra in three different pavillions. Also Read – ‘Playing Jojo was emotionally exhausting’With UK returning as focal theme country after a gap of 16 years, it be showcasing the best of its offer in arts and culture, education, and research through the UK government’s Knowledge is Great campaign, which includes information on the huge range of scholarships available for studying in the UK. While addressing the gathering at the conference, Rob Lynes, Director British Council India, said, “We are delighted that UK is the focal theme at this year’s Kolkata Book Fair. The British Council’s wants to showcase what the United Kingdom has to offer India and the rest of the world. A large number of UK publishers will also be present at the Kolkata Book Fair. It is estimated that nearly 80 per cent of books in the higher education category is shipped out from the UK.” Tridib Chatterjee, General Secretary of The Publishers & Booksellers Guild present at the conference said, “A special theme gate, a replica of the British Natural History Museum and another gate to commemorate the 125th birth anniversary of Charlie Chaplin has been set up to greet visitors”. Also Read – Leslie doing new comedy special with Netflix26 publishers from Bangladesh as well as those from the US, France, Germany, China, Japan, Columbia, Spain, Elsalvador, Ecuador, the Latin American countries among others are lined up to set up stalls at the Kolkata Book Fair. Some well-known writers like – British author of Bangladeshi origin Zia Haider Rahman whose debut novel In The Light of What We Know (2014), Anita Anand author of the book Sophia, a biography of Sophia Duleep Singh will be present at the fair. Other UK authors at the fair will be Shereen El Feki (author of Sex and the Citadel: Intimate Life in a Changing Arab World), Naomi Alderman (named one of Granta’s Best of Young British Novelists in 2013), QaisraShahraz (author of The Holy Woman), novelist Will Buckingham, Scottish poet Bill Herbertand Ned Thomas, whose memoir Bydoedd / Worlds (Wales Book of the Year 2011) will be launched in Bengali translation at the fair. The fair will also hold the second edition of the Kolkata Literature Festival from February 6-8. Nobel Laureate Amartya Sen will inaugurate the festival. The book fair will begin on a musical note with Ghazalaw, which celebrates the affinity between Indian Ghazal and the Welsh folk tradition. Mumbai singer Tauseef Akhtar and Welsh singer-songwriter Gwyneth Glyn weave the love poetry of their two ancient traditions together to the accompaniment of harp, tabla, guitar and harmonium. The 38th edition of the International Kolkata Book Fair was visited by 1.8 million booklovers over 12 days and books worth Rs 200 million were sold. “Last year the turnover of the 12 KBF was Rs 20 crore with English books alone selling for Rs 8 crore. We compiled the information provided to us by various participating publishers,” Chatterjee said.