Scientists find effective way to improve synchronization measured in chaotic systems

first_img Source: Reviewed by James Ives, M.Psych. (Editor)Feb 14 2019Scientists at Tokyo Institute of Technology found a simple, yet effective, way to improve how synchronization is measured in chaotic systems. The technique consists in adding a constant parameter to the “analytic signals” in a way that emphasizes certain aspects of their timing. This could help improve brain-computer interfaces, which are meant to aid disabled people.Humans are good at detecting whether separate things happen simultaneously, for example, if two lights flash together or not. When two swings move with a regular motion, it is easy to tell whether there is any temporal relationship or “synchronization.” However, the trajectory of some objects, such as kites, can be very complicated but still exhibit some pattern, even though our eyes may fail to follow it; such systems are called “chaotic.” In physics, chaos does not mean lack of order; it indicates the presence of a very complicated type of order. Such situations can be found across very different scenarios, including the activity of neurons.When trajectories, which do not necessarily correspond to physical movement and can instead represent electrical signals, are sufficiently complicated, it becomes challenging to determine if they are synchronized. In many cases, only some aspects of their motion might be interrelated. Hence, measuring synchronization is difficult and has been the subject of research for decades.Usually, when a trajectory approximately repeats itself in a loop, it is useful to consider at what point of this cycle the system we are observing is at a given time; we call this its “phase.” Meanwhile, when a trajectory is irregular, the size of the loop also changes and each cycle may be larger or smaller than the previous one; this is called the “amplitude.” These two aspects are independent and can be extracted from any signal via a mathematical trick called the “analytic signal.”Measuring whether the phases of two systems are related (“phase locked”) is crucial across many areas. Obtaining the degree of phase locking between all possible electrode combinations represents a good way of guessing what someone is thinking about via voltages measured on their scalp in an electroencephalogram. Such techniques are not yet very detailed but can detect some forms of imaginary movements to help drive devices that aid disabled people.Related StoriesAn active brain and body associated with reduced risk of dementiaWearing a hearing aid may mitigate dementia riskMercy Medical Center adds O-arm imaging system to improve spinal surgery resultsHowever, these brain-computer interfaces are generally slow and not accurate enough. Now, researchers in Japan, Poland and Italy propose a new approach to measuring the synchronization between electroencephalogram signals. This research was the result of a collaboration between scientists from Tokyo Institute of Technology, in part funded by the World Research Hub Initiative, the Polish Academy of Sciences in Krakow, Poland, and the University of Catania, Italy.The idea is straightforward and consists in adding a constant after calculating the “analytic signal”; this effectively has a warping effect, as shown in Figure 1. One consequence of this is that synchronization between the phases and amplitudes of two signals is captured jointly in a way that depends on the value of this added constant.The research team first analyzed the effects of adding this constant in simple theoretical systems before moving on to more representative cases, such as a network of transistor oscillators. Then, they applied their approach to a dataset of electroencephalogram signals for which users were told to either rest or imagine moving their left or right hand. The added constant clearly helped the team measure the synchronization between electrodes, ultimately allowing them to increase the classification accuracy for these imaginary actions.Although simple, the approach resulted in significant improvements in the cases analyzed by the team. In future works, they will continue to investigate this method so that it hopefully has an impact in practical applications.last_img read more

Chinas ZTE says its seeking a solution to US tech ban

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. The ban on state-owned ZTE was imposed last Monday in a case involving exports of telecoms equipment to Iran and North Korea. U.S. companies are barred from selling technology to ZTE for seven years.The penalty comes as tensions mount between Beijing and President Donald Trump over technology policy, though the case dates to before Trump took office in January 2017.ZTE pleaded guilty in March 2017 and agreed to pay a $1.19 billion penalty for having shipped equipment to Iran and North Korea in violation of U.S. regulations. The company promised to discipline employees involved in the scheme, but the U.S. Commerce Department said last week that they were paid bonuses instead.The company said Sunday in a statement on the Hong Kong Stock Exchange that since 2016, it has “learnt from its past experiences on export control compliance” and “attaches significant importance” to the work.It described steps taken that include the setting up of a committee on compliance led directly by the chief executive officer and a team of experts as well as training for employees.”The Company has taken and is taking steps to comply with the denial order,” the statement said, referring to the ban issued by the Commerce Department. “The Company is making active communications with relevant parties and seeking a solution.”The sanctions could handicap ZTE’s global business selling smartphones that use Google Inc.’s Android system and network gear for phone and internet companies that incorporates U.S. chips and other technology.The sales ban also could disrupt a multibillion-dollar revenue flow to U.S. companies such as Qualcomm Inc. that supply chips, software and other technology. Citation: China’s ZTE says it’s seeking a solution to US tech ban (2018, April 22) retrieved 18 July 2019 from ZTE Corp., one of China’s biggest tech companies, said Sunday that it is taking steps to comply with a U.S. technology ban and that it is seeking a solution to the issue it says threatens its survival. © 2018 The Associated Press. All rights reserved. China: Qualcomm plan ‘has difficulty’ resolving concerns Explore further read more

Massive HumanSize Jellyfish Stuns Divers Off the Coast of England

first_img Originally published on Live Taboolaby TaboolaSponsored LinksSponsored LinksPromoted LinksPromoted LinksYou May LikeVikings: Free Online GamePlay this for 1 min and see why everyone is addicted!Vikings: Free Online GameUndoTruthFinder People Search SubscriptionOne Thing All Liars Have in Common, Brace YourselfTruthFinder People Search SubscriptionUndoKelley Blue Book2019 Lexus Vehicles Worth Buying for Their Resale ValueKelley Blue BookUndoGundry MD Total Restore SupplementU.S. Cardiologist: It’s Like a Pressure Wash for Your InsidesGundry MD Total Restore SupplementUndoNucificTop Dr. Reveals The 1 Nutrient Your Gut Must HaveNucificUndoLivestlyThe List Of Dog Breeds To Avoid At All CostsLivestlyUndo In Photos: Spooky Deep-Sea Creatures Dangers in the Deep: 10 Scariest Sea Creatures 15 of the Largest Animals of Their Kind on Earth A pair of divers swimming off the southwestern tip of England hit the jelly jackpot last week after crossing paths with a hulking barrel jellyfish (Rhizostoma pulmo) — a rarely seen species that can grow about as large as a full-grown human. Luckily, they filmed the whole thing. The divers — biologist Lizzie Daly and underwater cinematographer Dan Abbott — shared the encounter in a Facebook video posted Saturday (July 13) as part of the Wild Ocean Week campaign — a series of videos showcasing the oddities of the deep to help raise money for the United Kingdom’s Marine Conservation Society.Headbutting Tiny Worms Are Really, Really LoudThis rapid strike produces a loud ‘pop’ comparable to those made by snapping shrimps, one of the most intense biological sounds measured at sea.Your Recommended PlaylistVolume 0%Press shift question mark to access a list of keyboard shortcutsKeyboard Shortcutsplay/pauseincrease volumedecrease volumeseek forwardsseek backwardstoggle captionstoggle fullscreenmute/unmuteseek to %SPACE↑↓→←cfm0-9接下来播放Why Is It ‘Snowing’ Salt in the Dead Sea?01:53 facebook twitter 发邮件 reddit 链接已复制直播00:0000:3500:35  Daly and Abbott were diving off the coast of Cornwall, U.K., when they saw the giant jelly emerge from the murky water. Also called the dustbin-lid jellyfish, the species is characterized by eight puffy arms capped by stinging tentacles and a large, globular head that lends the creature its unglamorous nickname. Barrel jellyfish sometimes wash up on the shore, Daly told Vice, but it’s rare for a diver to swim face-to-faceless-head with one of the massive blobs. [Marine Marvels: Spectacular Photos of Sea Creatures] While the barrel jellyfish is the largest species of jelly found in U.K. waters, it’s a mere shrimp when compared to the lion’s mane jellyfish (Cyanea capillata), the largest known species in the world. This coldwater jelly is known for its galaxy of 1,200 long, trailing tentacles, which can bring an individual creature’s total body length to up to 120 feet (36.5 meters) — which is longer than the average blue whale. This tangle of tentacles is so massive that a single lion’s mane jelly may be able to sting 50 to 100 people in just a few minutes if currents carry the jelly too close to a populated coast — a fun fact that a group of unlucky New Hampshire beachgoers learned the hard way in 2010.last_img read more

Western railways resume as Mumbai rains take break

first_imgSHARE File Photo: People wade through a flooded street at Dadar in Mumbai after heavy rains in on Tuesday, July 10, 2018.   –  The Hindu COMMENT SHARE SHARE EMAIL In a much-needed relief to Mumbaikars, heavy rains took a break today and the suburban train services resumed functioning, officials said. The local train services were badly affected on a section of the Western Railway (WR) yesterday due to inundation of tracks. The road traffic was moving smoothly after four days of heavy rains, which had crippled life in the megacity. Trains were packed with commuters since early morning and the WR was running its services on some routes with restricted speed as the tracks were still flooded. In just 10 days, the city received 864.5 mm rain, which is nearly equal to what it gets in an entire month, the MeT department said. The local trains, considered the lifeline of Mumbai, were suspended between Nallasopara and Virar stations yesterday, causing huge inconvenience to those travelling on the busy western line.“We decided to start local train services with a cautionary note. At 6.45 am, we started services between Churchgate (in south Mumbai) and Bhayander (Thane district) stations with a restricted speed of 10 kmph,” Ravinder Bhakar, WR chief spokesperson said.“Services between Virar and Dahanu Road (in adjoining Palghar district) have also commenced,” Bhakar said, adding senior railway officials were keeping a close watch on the restoration efforts. The railway official said though the water receded on tracks near the Nallasopara station (located in adjoining Palghar district), it was still “not at a safe level” to run trains. The suburban train services between Bhayander and Virar will commence once the water level on tracks comes down further, he said. The empty stranded rakes of some long-distance trains are also being cleared one by one from tracks, he said. The Central Railway’s local train services on its main line and harbour line were running late by 5 to 10 minutes today, a CR spokesperson said. The heavy downpour yesterday had caused flooding at Vasai, Nallasopara and Virar stations, leading to cancellation of many long-distance trains. The National Disaster Response Force (NDRF), police and fire brigade personnel had rescued 2,000 passengers of Shatabdi Express and Vadodara Express. Meanwhile, Mumbai suburban guardian minister Vinod Tawde will be returning to the city from Nagpur, where he was attending the Legislative Assembly session to review the situation in the megacity following heavy rains. The minister is expected to hold important meetings with senior officials of the city civic body and police, and discuss the arrangements being made to tackle the monsoon menace, a source said. Since the onset of monsoon, Mumbai has so far received almost 60 per cent of its required annual rainfall, the MeT said. The weather department has said heavy to very heavy rainfall is likely to continue in the city and its neighbouring areas till Saturday. The Brihanmumbai Municipal Corporation’s disaster management cell also said that intermittent rain with heavy to very heavy showers is likely over the city and suburbs in the next 24 hours. July 11, 2018center_img Mumbai Published on natural disasters COMMENTSlast_img read more

Story of Simon Oran Going hungry to bring water to Jharkhand villages

first_img Satyajeet Kumar New DelhiJuly 13, 2019UPDATED: July 13, 2019 08:36 IST Photo for representationIt is rare in life that we get to see people who are larger than life, making sacrifices for the greater good.One such person who has come into the limelight is Padma Shri awardee Simon Oran. His story is somewhat similar to Dasrath Manjhi of Bihar.Dasrath Manjhi is the man on whose life the film Manjhi: The Mountain Man starring Nawasuddin Siddiqui was based.While the nation lauded Manjhi’s efforts to carve a road out of a mountain and came to be known as the “mountain man”, most people are unaware of Simon Oran.Simon Oran managed to build canals and constructed three dams by drilling through mountains in Bero region of Jharkhand. His efforts earned him the name “waterman”.However, though his actions have benefitted the larger community, he himself is weighed down by poverty.For his contribution to environmental protection, water conservation and rain water harvesting, Simon Oran was felicitated with the Padma Shri by the then President Pranab Mukherjee.However, his days in glory were short-lived.The man, who dared to brave mountains, is proud of his medal and certificate but has been living a life of hardships.Simon Oran has always stood up for social causes but the other side of his life has a different story.Oran lives in a thatched house, the roof of which leaks during the monsoon. However, he does not have a BPL card.He is also under debt. He had taken a loan to dig a pond.Despite his financial troubles, Oran holds his head high with pride and does not ask for help from the government or any other agency.He says that villagers have been making efforts since 1961 to preserve water and not let it flow away.The entire area where he lives is dependent on agriculture which requires a huge amount of water. Oran was able to mobilise the people of many villages to contribute in the water-saving campaign.The collective efforts eventually paid off and a canal was built by carving mountains which led to the construction of three dams to fight the water woes. Now, the situation is under control and all one sees are the lush green fields.The people still conserve the forest by taking turns to guard it. Simon Oran’s wife stays with him but she looks tired, having battled poverty all along. Her face talks about the miseries of the life they lead in financial scarcity.Simon Oran is the parha raja which means the chief of 51 villages, according to the tribal institutional provision which is also recognised by the state government. Oran commands a great respect and easily motivates people towards his cause. Irony is such that while he is known for his efforts in social causes, Oran himself struggles on the personal front.Also read: Headless bodies of 2 children found in Jharkhand village, mentally unstable man heldALSO WATCH| Blast from the past: When dosa king P Rajagopal was convicted of murderFor the latest World Cup news, live scores and fixtures for World Cup 2019, log on to Like us on Facebook or follow us on Twitter for World Cup news, scores and updates.Get real-time alerts and all the news on your phone with the all-new India Today app. Download from Post your comment Do You Like This Story? Awesome! Now share the story Too bad. Tell us what you didn’t like in the comments Posted byIram Ara Ibrahim Story of Simon Oran: Going hungry to bring water to Jharkhand villagesSimon Oran managed to build canals and constructed three dams by drilling through mountains in Bero region of Jharkhand.advertisement Nextlast_img read more

Here Youve trained

Here,) Youve trained for the complexities of todays missions, however: TIME unveiled its Person of the Year shortlist on Monday, Nevada in 2009. Good afternoon to all of you.

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He wore a midnight blue button-down shirt and appeared healthy.” The proposal, is basically magic. Most of the findings focus on the following points: — No provision for fodder and water for the ailing cattle. read more