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Monthly Archives: August 2019

Archive of posts published in the specified Month

AMD announces a wireless videostreaming display system

first_img This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. © 2010 PhysOrg.com AMD and ViVu recently demonstrated for the first time a next-generation, HD content streaming solution. The most promising use of this technology is in the application of streaming video telepresence in HD. “Leading-edge video applications, such as those developed by ViVu, are exactly the type of immersive experiences we designed AMD Fusion APUs to enable,” said Manju Hegde, corporate vice president, AMD Fusion Experience Program said in the release. “Until now, streaming of HD telepresence-quality video was not possible without additional cables or hardware. We received an overwhelmingly positive response to our collaboration with ViVu at CES, and look forward to seeing this solution in market to the clear benefit of consumers and businesses alike in the near future.”The technology was on display at the International Consumer Electronics Show (CES). The wireless HD video streaming solution is expected to be available for consumers later in 2011, but no details have been give as to a more specific release date. has, with the assistance of videoconferencing software maker ViVu, entered the wireless video-streaming game display arena. The display, has been informally nick-name of the AMD Wireless TV, since the technology has no formal product name at this time.The setup goes something like this. The display can take streaming 720p HD content from an AMD-powered notebook using the 802.11n Wi-Fi standard. The software needed to make the stream work is a combination of Adobe Flash Player, and ViVu’s prototype software, which is based on AMD’s proprietary MXTP technology. The software can also be arranged to work with devices ranging from TVs to tablets and even projectors. The software will work with a wide variety of formats, from video to documents, giving it a mix of use for the home and for the office. The most promising use of this technology is in the application of streaming video telepresence in HD. “Leading-edge video applications, such as those developed by ViVu, are exactly the type of immersive experiences we designed AMD Fusion APUs to enable,” said Manju Hegde, corporate vice president, AMD Fusion Experience Program said in the release. “Until now, streaming of HD telepresence-quality video was not possible without additional cables or hardware. We received an overwhelmingly positive response to our collaboration with ViVu at CES, and look forward to seeing this solution in market to the clear benefit of consumers and businesses alike in the near future.”The technology was on display at the International Consumer Electronics Show (CES). The wireless HD video streaming solution is expected to be available for consumers later in 2011, but no details have been give as to a more specific release date. Explore further More information: www.amd.com/us/press-releases/ … aming-2011feb16.aspxcenter_img (PhysOrg.com) — AMD has, with the assistance of videoconferencing software maker ViVu, entered the wireless video-streaming display arena. The display, has been informally nick-name of the AMD Wireless TV, since the technology has no formal product name at this time. Citation: AMD announces a wireless video-streaming display system (2011, February 18) retrieved 18 August 2019 from https://phys.org/news/2011-02-amd-wireless-video-streaming.html AMD showcases ‘Llano’ Fusion APU The setup goes something like this. The display can take streaming 720p HD content from an AMD-powered notebook using the 802.11n Wi-Fi standard. The software needed to make the stream work is a combination of Adobe Flash Player, and ViVu’s prototype software, which is based on AMD’s proprietary MXTP technology. The software can also be arranged to work with devices ranging from TVs to tablets and even projectors. The software will work with a wide variety of formats, from video to documents, giving it a mix of use for the home and for the office.last_img read more

Researchers stop and store light for 60 seconds

first_img Journal information: Physical Review Letters This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Explore further Citation: Researchers stop and store light for 60 seconds (2013, July 26) retrieved 18 August 2019 from https://phys.org/news/2013-07-seconds.html © 2013 Phys.org More information: Physical Review Letters DOI: 10.1103/PhysRevLett.111.033601 In 1999 a team of researchers was able to slow light to just 17 meters per second. That led to another team devising a means for stopping its travel altogether in 2001, albeit for just a fraction of a second. Another team was able to increase that time to 16 seconds just a few months ago. In this new effort, the team in Germany has increased that time to a full minute.Stopping light and holding it in place, then releasing it is an important step towards the creation of a quantum repeater, a necessary component of a future quantum computer. Light carrying data must be held for a time then retransmitted to a destination based on data it’s carrying.To stop light and hold it the researchers started with a crystal that doesn’t normally transmit light at all. They cooled it to a very low temperature then fired a laser at it to cause a quantum superposition of two states, making it transparent for a precise range of frequencies. Next, they fired another laser through the now transparent crystal while turning off its transparency, trapping the light from the laser inside. They found they were able to hold the light in place for up to 60 seconds. Using the same technique the team found they were able to hold a pattern of light (three stripes) in place for the same amount of time. An analogy might be shining a flashlight into a dark room through a door, then shutting the door, waiting for a minute than opening a door on the other side of the room to let the light out. For light to be held, it has to be stopped, and that’s what the team did with their crystal and lasers.The researchers report that their findings suggest longer light-holding times should be attainable using other crystals. In order to apply their technique in a real-world computer, however, a way will have to be found to allow for holding then transmitting light at room temperature. Researchers use DNA origami technique to build nanoantennas with docking sites A team of researchers at Germany’s University of Darmstadt has succeeded in causing light to stop and then to be held in place for 60 seconds. In their paper published in the journal Physical Review Letters, the researchers describe how they achieved this feat and how their technique might be used in possible future applications.last_img read more

Researchers conduct chemical analysis of six extremely metalpoor star candidates

first_img Explore further Extremely metal-poor stars (EMPs) are generally perceived by astronomers as the relics of the early chemical evolution of the Milky Way galaxy. They can be crucial in advancing the knowledge of the nature of the first stars that formed in the universe as their chemical composition is an important tool for constraining the nucleosynthesis in the first generation of stars.Thus, a group of scientists led by Patrick Francois of the Paris Observatory in France has performed a chemical analysis of a sample of new EMP candidates from the SDSS DR12. They chose six stars from the database and obtained medium resolution spectra of these objects utilizing the X-Shooter spectrograph at ESO’s Very Large Telescope (VLT) in Chile. The observations resulted in determining chemical abundances of these stars.”From the recent analysis of SDSS DR12 data, we have detected new extremely metal-poor candidates that have never been observed at high resolution. In this article, we report the detailed analysis of six new extremely metal-poor candidates observed with the X-Shooter spectrograph installed on Kueyen at the ESO Very Large Telescope (VLT) on Cerro Paranal in Chile,” the researchers wrote in the paper.Metallicity of the six studied stars ranges from -5.0 to -3.5 [Fe/H], while their effective temperature is between 6,050 and 6,530 K.The researchers found that three stars of the six described in the paper are calcium (Ca) poor. They noted that the magnesium to iron (Fe) abundance ratios of this trio also appears rather low.The authors report that five stars of the sample show abundance ratios typical for metal-poor stars in the metallicity range between -3.5 and -2.0. However, one dwarf star in the sample, designated SDSS J002314.00+030758.0 (or SDSS J0023+0307 for short), showcases abundance anomalies. The scientists found that it has remarkably high magnesium (Mg) and calcium abundances.”We can see that the star SDSS J002314.00+030758.0 stands out, revealing very high overabundances of Mg and Ca sharing this peculiarity with Keller’s star (SMSS J031300-670839.3) and to a lesser extent Depagne’s star (CS 22949-037),” the paper reads.According to the researchers, the anomalies found in SDSS J0023+0307 suggest different channels for the enrichment of the gas that formed most metal-poor stars observed today.The scientists concluded that several different astrophysical processes could be behind such anomalies in SDSS J0023+0307, which include the explosions of supernovae and very rapid rotation of stars. However, more chemical studies of extremely metal-poor stars are needed to determine the most plausible hypothesis. 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. An international team of researchers has conducted a chemical study of six new very metal-poor star candidates in the Sloan Digital Sky Survey Data Release 12 (SDSS DR12). The new research, available in a paper published August 29 on the arXiv pre-print repository, could help researchers better understand the early stages of chemical evolution of the galaxy. Citation: Researchers conduct chemical analysis of six extremely metal-poor star candidates (2018, September 11) retrieved 18 August 2019 from https://phys.org/news/2018-09-chemical-analysis-extremely-metal-poor-star.html Astronomers identify a mega metal-poor dwarf star X-Shooter spectra of the stars centered on the magnesium triplet. The continuum of the three spectra located in the lower part of the plot has been shifted downward for clarity. The vertical lines indicate the location of the magnesium absorption lines. Credit: Francois et al., 2018. More information: Chemical analysis of very metal-poor turn-off stars from SDSS-DR12, arXiv:1808.09918 [astro-ph.GA] arxiv.org/abs/1808.09918AbstractThe most metal-poor stars are the relics of the early chemical evolution of the Galaxy. Their chemical composition is an important tool to constrain the nucleosynthesis in the first generation of stars. The aim is to observe a sample of extremely metal-poor star (EMP stars) candidates selected from the Sloan Digital Sky Survey Data Release 12 (SDSS DR12) and determine their chemical composition. We obtain medium resolution spectra of a sample of six stars using the X-Shooter spectrograph at the Very Large Telescope (VLT) and we used ATLAS models to compute the abundances. Five stars of the sample have a metallicity [Fe/H] between -2.5 dex and -3.2 dex. We confirm the recent discovery of SDSS J002314.00+030758.0. As a star with an extremely low [Fe/H] ratio. Assuming the alpha-enhancement [Ca/Fe]=+0.4 dex, we obtain [Fe/H]=-6.1 dex. We could also determine its magnesium abundance and found that this star exhibits a very high ratio [Mg/Fe] >= +3.60~dex assuming [Fe/H] = -6.13 dex. We determined the carbon abundance and found A(C)=6.4 dex. From this carbon abundance, this stars belongs to the lower band of the A(C)-[Fe/H] diagram. © 2018 Phys.orglast_img read more

Researchers find a way to synthesize small cyclodextrins

first_img Journal information: Science Cyclodextrins (CDs) are linked sugars that form in a way that leaves an open cavity, generally as a ring—chemists have found various ways to fill the cavities with other useful molecules, which often allows them to bind to small hydrophobic molecules. Once bound, they become trapped, making the CDs soluble. Each of the rings has its own name depending on the number of sugars, such as octamers or hexamers. Pharmaceutical and other chemical companies have exploited CDs to make a wide variety of consumer products and medicines. CDs in common use are typically made from six to eight sugars, but chemists would like to make new products that use smaller rings with just three or four sugars (CD3 and CD4). Unfortunately, there has not been a way to create such small cyclodextrins until now. In this new effort, the researchers in Japan found a way to solve the problems that other researchers encountered, revealing how to create new products based on small cyclodextrins.To create the small cyclodextrins, the researchers used linkers to create building blocks. The building blocks served to alter the sugar conformation—more specifically, the linkers pushed the monomers into having a balanced preference between multiple possible shapes. This behavior is called suppleness. The researchers forced suppleness by physically connecting each linker with two of the sugar alcohol groups, which resulted in the creation of another ring. That allowed the team to overcome the high strain between the bonds that held the sugars together—a problem that has prevented their creation in the past.Cyclodextrins are mainly used to make drugs, but other applications have included agriculture products and environmental engineering. Their popularity is mostly attributable to their safety—they are all non-toxic. Because of their history, it is likely that the new, smaller cyclodextrins will be used in similar applications. Structures of CDs and key elements enabled synthesis of 3 and 4. (A) Because of the strained glucopyranose-rings in 3 and 4, their existence was considered implausible. (B) Conception of the EDB bridge and the α-selective glycosylation attributed to the EDB bridge. The α-selective glycosylation using 5, which possesses the 3,6-O-o-xylylene bridge, lacked clarity and effectiveness. A desire to improve the reaction led to the 3,6-O-EDB-bridged 8. Glycosylation reaction with 8 proceeded efficiently with α-selectivity. (C) Suppled pyranose by formation of the 3,6-O-EDB bridge. Because the conformation of the EDB-bridged compounds is not constant, we hesitated to adopt the conventional notation of carbohydrates based on the chair form. For the synthesis of 8 to 12, see SM-9–14. For the determination of each conformation, see SM-8–14. Cp, cyclopentadienyl; EDB, 1,1′-(ethane-1,2-diyl)dibenzene-2,2′-bis(methylene); MS, molecular sieves. Credit: Science (2019). DOI: 10.1126/science.aaw3053 More information: Daiki Ikuta et al. Conformationally supple glucose monomers enable synthesis of the smallest cyclodextrins, Science (2019). DOI: 10.1126/science.aaw3053 Citation: Researchers find a way to synthesize small cyclodextrins (2019, April 12) retrieved 18 August 2019 from https://phys.org/news/2019-04-small-cyclodextrins.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.center_img Separation a sweet success A team of researchers at Kwansei Gakuin University in Japan has found a way to synthesize small cyclodextrins (types of cyclic oligosaccharides) for the first time. In their paper published in the journal Science, the group outlines their strategy and describe how well it worked. © 2019 Science X Network Explore furtherlast_img read more

Tusker terror One killed one injured in separate attacks

first_imgKolkata: A 60-year-old man was trampled to death by an elephant at Ratanpur area of Narayangarh in West Midnapore on Tuesday. In a separate incident, another victim was injured in the attack of an elephant at Belda in the same district.Police said that the deceased, Bholanath Singh (60), a resident of Ratanpur area, was going inside the forest when a tusker suddenly appeared before him. The victim tried to flee but failed to do so. The wild tusker trampled him. Also Read – Heavy rain hits traffic, flightsWhen some of his family members went searching for him, they found the victim lying in a pool of blood. He was rushed to a nearby hospital, where the doctors declared him brought dead.According to a district forest official, a herd of elephants entered the Ratanpur forest area on Monday night. After being informed, the Forest department officials reached the spot to drive away the elephants. The local villagers were also cautioned not to enter the forest. The district forest official said that some elephants were also roaming free at Belda area of the district. Another person, identified as Suren Singh, a resident of Podiachak area of Belda, received injuries in an elephant attack. He was taken to the Belda Village Primary Health Centre. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedThe Forest department has assured compensation to the family members of the deceased. They have started a search operation to drive the wild animals into the core forest.Despite several initiatives taken by the Forest department, the incidents of elephants entering areas of human habitation continues unabated.The state Forest department has already introduced a specially equipped vehicle, ‘Airavat’ in forest adjoining areas of the districts, to prevent the wild tuskers from entering into areas of human habitation. ‘Airavat’ is a big van equipped with tranquilisers, rifles, hooters, public address systems, four halogen lights and chains.last_img read more

EC issues stern warning over hate speeches

first_imgWith the declaration of the Assembly poll schedule on Monday, the Model Code of Conduct came into force in the capital with Delhi’s chief electoral office forming different committees to look into electoral issues.Warning political leaders against making hate speeches, the Election Commission on Monday said there will be strict and “ruthless” enforcement of the Model Code of Conduct during Delhi polls and it will have zero tolerance against such occurrences. Also Read – Company director arrested for swindling Rs 345 croreIn the Assembly poll, voting will take place in 11,763 polling booths in 2527 locations across the city. As per the electoral roll published till January 5, the total number of voters in the city have been estimated at 1,30,85,251 out of which 72,60,633 are men and 58,24,618 are women voters. The Assembly election in Delhi, being touted as a direct contest between BJP and AAP, will be held on 7 February. Counting of votes for the election to the 70-member Assembly will be held on 10 February . Also Read – Man who cheated 20 women on matrimonial websites arrested“We have formed different committees, including expenditure committee, at the level of districts to look into all matters ralated to elections. We will soon be imparting training to our staff in a phased-manner,” Delhi’s Chief Electoral Officer Chandra Bhushan Kumar said.The notification for the polls will be issued by the Lieutenant-Governor on January 14 while the last date for filing nominations is January 21. The date of scrutiny is 22 January , while candidates can withdraw from the electoral battle by January 24.last_img read more

Rise and write

first_imgAnd Still I Rise is a gender re-education programme using art and the written word. An exhibition and a series of 10 workshops will be organised, designed and delivered in which up to 20 teenage girls will be encouraged to write letters about their aspirations. The Exhibition will showcase a collection that will focus on a hopeful determination to rise above difficulty and discouragement. This is a central theme of the exhibition and education programme, which aims to provide hope against stereotyping by raising awareness of gender discrimination and the impact of gender stereotyping on limiting opportunities for women worldwide. Also Read – ‘Playing Jojo was emotionally exhausting’Anand Kapoor and Elizabeth Rogers have curated the exhibition for Creative Services Support Group, based on one of Maya Angelou’s most famous collection of poems – And Still I Rise. The Exhibition will feature the writings of young women in India and from around the world and bring together the similarities and differences; the hopes and dreams; the ambitions; with focus on the evolving role of the woman in the future. The artworks reinforce the power of the written word across languages and cultural realms, and the inherent energy of art to transform beings and enrich their lives.last_img read more

Foreign Trade Policy soon Nirmala

first_img“Yes, I am conscious that the FTP (2014-19) was due even as of April 1, last year. Hopefully, we will come out (with FTP) soon,” Commerce and Industry Minister Nirmala Sitharaman told reporters here. The minister said that the delay in announcement of FTP is not the reason for declining exports. “I differ from this view. Even when the FTP was explicit and was there in place between 2009 and 2014 exports suffered,” she said. However, Sitharaman added that a policy in place helps in giving direction. Also Read – I-T issues 17-point checklist to trace unaccounted DeMO cash”A policy in place does help because you are able to identify sectors,” she added. Talking about the delay in unveiling of the policy, she said that the new five year FTP requires comprehensive deliberations on various sectors and exporting destinations. “The new policy needs to be out of the box and it has to support India’s exports in terms of looking at sectors and their capability and new and traditional markets of the world…so a comprehensive exercise of how to help exports, how better focus on areas which have great potential for India’s exports have to be worked out in great details, she said. The ministry has done an extensive job on it, she said. The foreign trade policy, which is usually announced in April, provides guidelines for enhancing exports with the overall objective of pushing economic growth and generating employment.Under the policy, the government gives fiscal incentives to exporters under different schemes such as Market Access Initiative, Marketing Development Assistance, Vishesh Krishi and Gram Udyog Yojana.last_img read more

Malay De to take stock of Bengals roads in meet

first_imgKolkata: In a bid to ensure that people do not face inconvenience due to poor road condition during monsoon, Chief Secretary Malay De will be holding a high level meeting to take stock of the condition of roads in the state.The meeting is scheduled to be held on Friday in the state secretariat and all concerned officials, including senior engineers from the state Public Works Department (PWD), will be present in the meeting.There are around 2,200 roads under the PWD, measuring around 15,400 km. Recently, the PWD has also taken up roads measuring around 3,000 km from Zilla Parishads, for their widening and strengthening. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedAll executive engineers of the PWD, including those of its National Highway wing, were directed to send a report on the condition of all roads under their jurisdiction and it was directed that the report should reach the concerned official within July 5.Concerned superintendent engineers were also requested to “pursue the matter”.The executive engineers have to provide actual length and width of the roads and whether the condition at present is good, moderate or bad. They also have to mention if any tender has been floated or sanctioned to carry out repair work of any stretch of road till June 30. Also Read – Naihati: 10 councillors return to TMC from BJPBased on the report, the discussion in the meeting will be held. There will also be discussion to decide if work needs to be carried out for any road.It has been learnt that the top brass of the PWD had reviewed the condition of the roads in April. Now, the Chief Secretary is going to review the entire situation and wouldsuggest steps that need to be taken.It may be mentioned that the condition of roads has improved in the past seven years, with a series of projects taken up by the Mamata Banerjee government since 2011. Both in the urban and rural parts of the state, road condition has improved and for the first time ever in the history of Bengal, roads in villages have also been concretised. Steps have also been taken to construct 27,000 new rural roads.Apart from constructing new roads that ensure a development of infrastructure, the state government also maintains vigil to know if any stretch of road is in poor condition and the repairing work is taken up on an immediate basis, so that people do not face any problem.last_img read more

Jaldapara Forest dept to check elephant deaths

first_imgSiliguri: The Jaldapara Forest department will take steps to prevent death of elephants in the locality.The Forest department called for a meeting in Madarihut district of Alipurduar near Jaldapara Forest. Chiranjeet Pal, the forest beat officer of Jaldapara National Park, Uttam Sharma and other members of the Panchayat Sabha, including the locals were present in the meeting.”The forest area comprises many elephants and they are a valuable asset to us. Thus, we have to be responsible in order to save them from the frequently occurring fatal accidents,” said Also Read – Rain batters Kolkata, cripples normal lifeDifferent awareness projects on the prevention of fatal accidents of the pachyderms had been discussed in the meeting.Any elephant, if noticed, to cross the rail line especially during the night should be immediately reported to the Forest department.In case of the late arrival of the personnel, locals are requested to signal the loco pilot with the help of a torch so that they decelerate the train speed.”There have been a number of meetings between the Electricity and Forest departments over the issue of elephant deaths due to electrocution and we are trying our best to come up with a solution,” a source in the Forest department said. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedThe area has witnessed many accidents of the pachyderms.The man-animal conflict is on the rise in North Bengal due to the unchecked expansion of human activities in the natural habitats. This has increased elephant deaths. “We hope that different awareness projects on saving the forest lives will decline the death rate of the animals. Both the government and the department are planning more projects to save the forest ecosystem,” the source added.last_img read more