31 08 19

first_img Explore further (PhysOrg.com) — GPS may no longer have to be about following audio directions only, and looking at maps on your screen. Wikitude Drive for Android offers an augmented reality feature that lets you actually see the road ahead. 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. It represents the first turn by turn navigation app making use of augmented reality. It only works on Android phones with at least an OS version 1.6. CNET reports on how the application works:The app utilizes the phone’s camera and GPS receiver in tandem, layering the selected route over a live view of what’s ahead of the car. Sort of like Google Maps’ Street View, but in real time. Citation: Augmented Reality for Your GPS (w/ Video) (2010, May 21) retrieved 18 August 2019 from https://phys.org/news/2010-05-augmented-reality-gps-video.html Since Android can run more than one app at a time, one hopes that you can still use voice activation (if you have it) to receive and make phone calls, even though you are using the navigation app. It might kind of distracting, though, and it is important to remember that you should actually be watching the road, and not driving from the information you see on your smartphone screen.The app was in beta testing, but the test has ended, so it might be a little while before you actually get to use it. © 2010 PhysOrg.com More information: Wikitude – www.wikitude.org/ Point your phone to ID placeslast_img read more

31 08 19

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. Created in 1976, the Apple-1 was only worth $666.66 and was one of an estimated 200 produced by the hand of co-founder Steve Wosniak. The original version, sold without a keyboard, monitor or power supply, came equipped with only 8 kilobytes of RAM, which is small potatoes compared to today’s memory standards. A major drawback of the Apple-1 was the lack of a floppy drive. The programs were loaded onto the memory from cassette tapes that were sold separately, making the total invoice for the Apple-1 a mere $741.66. One tape, labeled “BASIC,” that was used to load programming language, will be included in the sale at the auction.Other items said to be included will be original packaging, manuals, cassette interface, basic tape, early documentation and provenance and a rare letter from Steve Jobs.Though the Apple-1 was the first of its kind, it was soon replaced in 1977 by the more famous Apple II. Just two months ago, another Apple-1 was sold on Ebay for $22,766.66 with only the cassette interface. The auction will be at Christie’s auction house in London on November 23rd and feature the the Apple-1 alongside manuscripts and papers by Charles Babbage, Alan Turing and more. The Apple-1 is expected to sell for an estimated $242,400. Citation: First Apple computer ready for auction (2010, November 12) retrieved 18 August 2019 from https://phys.org/news/2010-11-apple-ready-auction.html (c) 2010 PhysOrg.com Explore further Briefs: Apple secures memory supply to 2010last_img read more

31 08 19

first_imgCredit: Nature (2018). DOI: 10.1038/nature25155 A team of researchers from the University of South Florida and Florida State University has developed a one-pot synthesis technique for creating 2-D multi-junction heterostructures. In their paper published in the journal Nature, the team describes their technique and why they believe it will be useful for building future high-speed electronics and optoelectronic devices. Weijie Zhao and Qihua Xiong with Nanyang Technological University in Singapore offer a News and Views piece in the same journal issue outlining the work done by the team in Florida. Explore further Journal information: Nature As scientists continue to study the possible benefits and uses of 2-D semiconductors, they have found that they must also study heterostructures—tiny structures that serve as interfaces between 2-D semiconductors and other 2-D semiconductors. Prior research has narrowed the options down to vertical or lateral heterostructures. Current one-step methods for creating lateral heterostructures lack flexibility—they can only produce one type of heterostructure—and two-step (or multi-step) methods involve making many changes to precursors and reaction chambers, making them difficult to carry out. In this new effort, the team in Florida has found a way to create multiple types of heterostructures using a one-pot technique that allows several steps to be carried out in a single reaction chamber.The new approach, as Zhao and Xiong note, is based on chemical vapor deposition—they expose a substrate to a gaseous precursor, which deposits heterostructures as part of a reaction process. The new technique employs the use of a carrier gas to bring transition-metal dichalcogenides, generically written as MX2, into contact with the substrate—in this case, 2-D MoX2 and WX2. Furthermore, they found that the heterostructures that were grown due to the reactions in the chamber could be switched by changing the carrier gas. This approach produced multiple types of heterostructures in a single reaction chamber. The group looked at their results with high-resolution transmission electron microscopy to make sure the heterostructures grew as expected, and report that they did. They also conducted spectroscopic analysis of their work to show that the junctions were made in a way that was reproducible. They then created primitive electrical devices to show that they worked as intended.Zhao and Xiong note that because their technique is relatively simple, it appears their approach has the potential to be useful in manufacturing desired devices including flexible electronics. Citation: Creating 2-D dichalcogenide structures using chemical vapor deposition (2018, January 4) retrieved 18 August 2019 from https://phys.org/news/2018-01-d-dichalcogenide-chemical-vapor-deposition.htmlcenter_img Breakthrough in ‘wonder’ materials paves way for flexible tech © 2018 Phys.org More information: Prasana K. Sahoo et al. One-pot growth of two-dimensional lateral heterostructures via sequential edge-epitaxy, Nature (2018). DOI: 10.1038/nature25155AbstractGrowing lateral heterostructures of two-dimensional (2D) dichalcogenide structures via chemical vapour deposition opens up new opportunities for building 2D electronic and optoelectronic devices. But it is challenging to make multiple spatially defined lateral heterostructures. This paper reports a straightforward one-pot approach to growing 2D multi-junction heterostructures by switching the gas environment in the presence of water vapour flowing over the solid sources of both MoX2 and WX2 powders placed in the same boat. The gas environment regulates the precursor species in the vapour phase via precursor volatilization and water-induced oxidation and can thus control their preferential deposition. Humberto Gutiérrez and colleagues use this technique to create multiple heterostructures of MoX2 and WX2 in one reactor and to make alloyed sulfide/selenide heterostructures. 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

31 08 19

first_img © 2018 Phys.org Quantum memories are devices that can store quantum information for a later time, which are usually implemented by storing and re-emitting photons with certain quantum states. But often it’s difficult to tell whether a memory is storing quantum or merely classical information. In a new paper, physicists have developed a new test to verify the quantum nature of quantum memories. More information: Denis Rosset, Francesco Buscemi, and Yeong-Cherng Liang. “Resource Theory of Quantum Memories and Their Faithful Verification with Minimal Assumptions.” Physical Review X. DOI: 10.1103/PhysRevX.8.021033 The new test uses a semiquantum framework that is very similar to that used in some tests of entanglement in quantum states, in which the entanglement refers to correlations in space, in contrast to the time-like entanglement in quantum memories. Conventional protocols for testing for space-like correlations often use two characters, Alice as the sender and Bob as the receiver of quantum states. But since quantum memories involve time-like correlations, the protocol needs only a single character, whom the researchers call Abby, to act as both the sender and receiver at different times. In the test proposed in the new study, by comparing the relative frequencies of the signals that Abby sends and receives, it is possible to estimate the time-like entanglement and therefore certify that a quantum memory can store quantum information.The researchers showed that the new test is robust against noise and losses, and they expect that it should be possible to experimentally perform the test with current technology. The test would then provide a very useful tool for the future development of quantum memories.”In the development of novel quantum technologies, it’s crucial that there exists a reliable way to benchmark the relevant components and make sure that they function as expected,” Liang said. “Our findings provide a way to certify one of the most important features of these components while making sure that we are not making more assumptions than necessary. With these tests, we hope that it simplifies the quality control procedures of quantum devices while not falling into the trap of making unjustifiable assumptions.” 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. Journal information: Physical Review X Citation: How can you tell if a quantum memory is really quantum? (2018, May 23) retrieved 18 August 2019 from https://phys.org/news/2018-05-quantum-memory.html (i) Although the inner workings of a quantum memory are hidden from view, if a memory can be simulated by measurement and state preparation (corresponding to entanglement-breaking channels) as shown in (ii), then the memory is not genuinely quantum. Credit: Rosset et al. Published by the American Physical Society Physicists use quantum memory to demonstrate quantum secure direct communication The researchers, Denis Rosset, Francesco Buscemi, and Yeong-Cherng Liang, have published a paper on the quantum memory test in a recent issue of Physical Review X.”Quantum memories are indispensable components of long-distance quantum communication networks and potentially even in a full-scale quantum computer,” Liang, a physicist at National Cheng Kung University in Taiwan, told Phys.org. “For these components to serve their purpose, it’s essential that they can preserve, at least, the quantum entanglement between certain inputs to the memory and whatever other parts that did not enter the memory. Our work strikes the right balance in certifying any device that possesses this ability while making the minimal assumptions.”As the scientists explain, the quantum entanglement between the system stored in the memory and any remote systems not in the memory must be maintained for the entire storage time. If this entanglement is broken at any time, then the device no longer functions as a quantum memory but rather as an “entanglement-breaking channel” and as a result can transmit only classical information. Although currently there are tests that can verify the quantum nature of a quantum memory, these tests have certain limitations. For one, they require the experimenter to trust that the measurement and state preparation devices used by the quantum memory are accurate. For this reason, these tests are called device-dependent protocols. However, a test that makes no assumptions cannot be “faithful,” meaning it may overlook some genuine quantum memories. This is because these methods test for the violation of a Bell inequality as verification of entanglement, which is sufficient but not necessary, as some genuinely quantum channels do not violate Bell inequalities and so would not pass this test.Although it would be ideal to design a test that is completely device-independent, the researchers explain that it is not possible to test a single memory in this manner, even in principle, due to the need to test the quantum memory at two different times. However, their new test is measurement-device-independent, meaning it still requires the state preparation device to be trusted, but no assumptions need to be made regarding the measurement device. The new test is also faithful, meaning it can correctly identify all quantum memories that function as non-entanglement-breaking quantum channels.last_img read more

31 08 19

first_img by NPR News Greg Allen 8.28.19 8:00pm The Trump administration is considering removing the Key Deer, one of Florida’s most iconic and beloved animals, from the Endangered Species List. Named for its habitat in the Florida Keys, they are tiny versions of whitetail deer, typically at the shoulder just two or three feet tall. They’re cute, popular with tourists and used to be found on more than a dozen Florida islands. Today, most of them live on a single island, Big Pine Key. Jan Svejkovsky, a wildlife biologist with Save Our Key Deer, points out a young Key Deer as he drives through a residential neighborhood on the island. It’s a little bigger than a Chihuahua. “It’s a little buck,” Svejkovsky says. “One spike on each side. My guess is he’s a year old.”Svejkovsky’s driving around surveying some of the damage done to the Key Deers’ habitat two years ago in Hurricane Irma. On this part of the island, the road is lined with acres of dead mangrove bushes. “Mostly this was black mangrove,” Svejkovsky says. “[For] the deer here on this peninsula, mangrove is a very, very big part of their diet. And they lost a lot of it.”Hurricane Irma had a big impact on the Key Deer population, as hundreds died in the storm and its aftermath. Scarcity of freshwater is a major problem because Irma inundated the island, filling freshwater ponds with seawater. Svejkovsky and his wife Valerie Preziosi, who also volunteers for Save Our Key Deer, have been monitoring ponds and checking their salinity. On one part of the island, a peninsula called Long Beach, Preziosi uses a handheld meter to test the water in a pond that deer used to frequent. It reads 61.8 parts per thousand. “That’s double seawater,” she says. Svejkovsky adds, “This part of their habitat is now dead because post-Irma, it has no drinkable water.”Many deer now get water from drainage lines from air conditioners and buckets left out by residents. The problem is likely to get worse with climate change. The sea level here is expected to rise by as much as two feet by 2060. As that happens, the amount of freshwater available for Key Deer is likely to diminish. Many deer have also died from a disease, screwworm, and from being hit by cars. Today, the total population is around 600 animals. Given those numbers, and the challenges they’ve faced, many here were surprised when the U.S. Fish and Wildlife Service recommended taking Key Deer off the Endangered Species List.Nearly a hundred people turned out for a recent meeting convened by Fish and Wildlife officials. Most of them were Key Deer advocates. Roxanna Hinzman with Fish and Wildlife did her best to allay their concerns. She opened the meeting with an announcement, “There has been no final decision to delist the Key Deer.” As part of a national plan reassessing the status of animals and plants on the Endangered Species List, USFWS has recommended that the Key Deer be “delisted due to recovery.” At the meeting, Hinzman pointed out that the Key Deer population, once as low as 50, grew in recent years to as many as 1,000. The recent decline of the herd recently and the hundreds of deaths, Hinzman says in itself isn’t a reason to keep the species on the list. In the past, despite hurricanes, fires and disease, Key Deer have always rebounded. “These are a subspecies of whitetail deer and they’re very resilient,” Hinzman said. “They use a lot of different kinds of habitat, eat lots of different kinds of food. So, as long as they’ve got the habitat and the resources they need, we’re expecting that they will continue.” Because they’re currently endangered, the islands where most Key Deer live, Big Pine Key and No Name Key, have strict habitat conservation plans that limit development. Vivian Beck, with the Key Deer Protection Alliance, believes that’s a factor in the move to now take them off the endangered species list. “What’s the one thing stopping development in Big Pine Key and No Name? The Key Deer,” says Beck. USFWS officials acknowledge that the biggest threat they see to Key Deer is rising sea levels. For that reason, plans to release an assessment of the deer and their habitat have been put on hold while the agency seeks additional input on sea level rise. Advocates see that as a good sign — that compelling scientific information may yet force the government to keep Key Deer on the endangered species list.Copyright 2019 NPR. To see more, visit NPR. Trump Administration Opens Door To Dropping Florida’s… Greg Allencenter_img https://ondemand.npr.org/anon.npr-mp3/npr/atc/2019/08/20190828_atc_trump_adminis…last_img read more

31 08 19

first_imgPeople who get dietary fibre from many sources benefit more than those who limit their intake to a single food or low-fibre diets, new research shows.The recommended amount of dietary fibre per day is 38 grams for men and 25 grams for women.“Men typically get around 18 grams and women get around 15 grams,” said Julie Miller Jones, professor emeritus at Minnesota-based St Catherine University.Daily fibre intake helps control cholesterol, blood pressure, glucose, insulin and excess weight. Also Read – ‘Playing Jojo was emotionally exhausting’It also regulates multiple facets of the digestive system. Two fruits and three vegetables servings a day can help adults get the recommended amount of fibre.“The problem is that when consumers choose fruits or vegetables, it is often low-fibre options such as one piece of lettuce and a thin slice of tomato on a sandwich.”Instead of looking at only plant-based sources, people should strive for a mix of fibre sources, including fibre that has been added to food in the manufacturing process.Such foods are fibre-fortified bread, cereals, yogurt and pasta. “A combination of naturally occurring and added fibre can increase the chances of achieving the health benefits of a high-fibre diet,” the authors noted.The study was presented at ‘IFT15: Where Science Feeds Innovation’ event in Chicago recently.last_img read more

31 08 19

first_imgThe five permanent members of the United Nations Security Council were struggling to agree on a draft resolution endorsing an international bid to end the five-year-old civil war in Syria ahead of ministerial talks taking place in New York on Friday.The U.S. ambassador to the United Nations, Samantha Power, told reporters that the five veto-wielding council members did not yet have an agreed draft to present to the 15-nation body for approval on Friday. Also Read – Nine hurt in accident at fireworks show in French resortOriginally, Western powers hoped the council would rubber-stamp a resolution endorsing a two-year road map for talks between Syria’s government and opposition on a unity government expected to begin in January and eventual elections. Council diplomats said they hoped agreement on a text could be clinched. The road map, which also calls for a nationwide ceasefire that would not apply to Islamic State, Nusra Front and some other militant groups, was worked out in two rounds of ministerial talks in Vienna. Also Read – Pakistan Army ‘fully prepared’ to face any challenge: Army spokesmanRussian Ambassador Vitaly Churkin suggested there were significant disagreements among the five powers. “I’m not sure it’s going to happen because there are some unfortunately deliberate, or not deliberate, attempts to undercut the Vienna documents and we don’t want to see that,” he told reporters without elaborating.When asked what the problems were, he said: “There are a few.” German Foreign Minister Frank-Walter Steinmeier said there was “some movement” in the talks on Syria, adding that one goal of the New York meetings was to clarify the timeline for peace talks between the government and opposition. Foreign ministers from more than a dozen countries – including Russia, the United States, Turkey, Saudi Arabia, Iran and other European and Middle Eastern powers – were set for talks aimed at ending Syria’s old civil war at New York’s Palace Hotel on Friday.Diplomats said no breakthrough was expected.Earlier this week diplomats said some progress had been made on the most difficult sticking point in the talks – the fate of Syrian President Bashar al-Assad.They said Russia had indicated it had no problem with the eventual ouster of Assad at the end of a transition period, though it would not admit that publicly. Despite the narrowing of differences, disagreements remain, as shown by the difficulties the five permanent council members were having agreeing on a resolution endorsing the Vienna road map.last_img read more

31 08 19

first_imgForgetting can be the result of an active deletion process in the brain rather than a failure to remember —a mechanism that helps us adapt our behaviour according to the surroundings, says a new study. The findings could point towards new ways of tackling memory loss associated with conditions such as Alzheimer’s disease and other types of dementia.“Our study looks at the biological processes that happen in the brain when we forget something,” said Oliver Hardt from University of Edinburgh in Scotland. “The next step is to work out why some memories survive whilst others are erased. If we can understand how these memories are protected, it could one day lead to new therapies that stop or slow pathological memory loss,” Hardt said. Also Read – ‘Playing Jojo was emotionally exhausting’The findings were published in The Journal of Neuroscience. The study conducted in rats could also help scientists to understand why some unwanted memories are so long-lasting such as those of people suffering from post-traumatic stress disorders.Memories are maintained by chemical signalling between brain cells that rely on specialised receptors called AMPA receptors. The more AMPA receptors are on the surface where brain cells connect, the stronger the memory.last_img read more

31 08 19

first_imgA vocal recital by Ujwal Nagar, accompanied by renowned flautist Rohit Prasanna and ace Sitar player Soumitra Thakaur, will speak of the evolving picture of Indian classical music. Ujwal, incidentally the lead vocalist of Advaita band, who is known for his experimental yet traditional outlook towards music, has maintained the sanctity of this traditional art.  Greatly appreciated by classical music connoisseurs, his appealing voice texture and intricate sargam patterns indicate the depth of his growing musical maturity. Having performed at places like Thailand, South Africa, UK, Europe and Brazil, Ujwal, has made a name for himself in the international scenario through his diligence and hard work.  Also Read – ‘Playing Jojo was emotionally exhausting’A performer to reach to the heart of the audience needs remarkable command over layakari and inner connection while performing. The music heritage must be imbibed intricately along with the development of a keen sense of sur and taal, and Sitar virtuoso Rohit Prasanna possesses them along with polished tonal grace, rhythmic elegance, and lucidity of expression. Hailing from a family of legendary flautists, Rohit is trained and groomed under the late Pandit Raghunath Prasanna and father Ravi Shankar Prasanna. Adding his own dedication and finesse to this art, he through painstaking practice, assiduous assimilation and erudite presentation, has created a niche for himself.  Also Read – Leslie doing new comedy special with Netflix A scholar of Sahitya Kala Parishad, he will be performing his own distinct style today. The evening will witness another ace performer, Soumitra Thakaur, who hails from Bishnupur gharana, and is the student of sitar maestro, Pt. Kushal Das. Reflecting the styles of famous Maihar and the Imdadkhani Etawah Gharana, he will perform an interesting amalgamation of symphonies from Carnatic and Hindustani Classical genres.last_img read more

31 08 19

first_imgDarjeeling: A state inspection team, along with Gorkhaland Territorial Administration representatives, visited the engineering college building at Tukdah to study the feasibility of whether the under-construction building can be used to temporarily house the Darjeeling Hill University from 2019.The GTA is constructing an engineering college in Tukdah, funded by the NHPC under their CSR activity. A university has also been a long standing demand of the residents of Darjeeling and Kalimpong Hills. Also Read – Rain batters Kolkata, cripples normal lifeThe Centre, however, has turned a deaf ear to demands of a central university, despite a clause in the Gorkhaland Territorial Administration Memorandum of Agreement signed between the Union and state governments and the Gorkha Janmukti Morcha. Finally, the state government took up the matter. A ‘Darjeeling Hill University Bill’ was passed in the Bengal Assembly on July 31. The Chief Minister flagged off the project on September 5 from a government programme held at Darjeeling Chowrasta. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedIncidentally, the GTA had proposed that the state government take over the newly constructed engineering college at Tukdah, on the land of the Sericulture Directorate, West Bengal with the help of CSR funds received from NHPC Ltd. and convert it into a state-aided engineering college. The order issued by the state government on November 22, 2018 stated: “The department of Higher Education, government of West Bengal has decided to assess the land and built-up infrastructure of the newly constructed engineering college at Tukdah, Darjeeling and its suitability of plan and design as per AICTE norms.” The state government has also constituted a committee to ascertain whether the under construction building in Tukdah can be used as the engineering campus of the proposed Darjeeling Hill University, the main campus of which would be set up in Mongpoo. The other option that the inspecting team would also consider is whether the preliminary operation of the academic activities of the university can be started at the building in Tukdah, before completion of the main campus in Mongpoo. The four member committee includes Prof. Subha Sankar Sarkar, vice-chancellor, Netaji Subash Open University, Dr. Amalendu Basu, director of Technical Education, West Bengal, Dr. Prabal Deb, principal, Cooch Behar Government Engineering College and Pranabesh Das, additional director of Technical Education, West Bengal. The four member team held a meeting with Binay Tamang, chairman, Board of Administrators, GTA, in Darjeeling on Thursday, before visiting Tukdah. The team was accompanied by Darjeeling MLA Amar Singh Rai and Karuna Pradhan, director, Engineering department, GTA.last_img read more