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Reviewed by Kate Anderton, B.Sc. (Editor)May 3 2019Exceeding noise levels of 100 decibels, the grunting sounds produced by some tennis players when hitting the ball are on a par with motorbikes or chainsaws. While fans react to these impressive exhalations with either annoyance or amusement, the habit has also been a source of intense debate among professionals.For instance, Serena Williams has said that she is not bothered by opponents grunting in the heat of the competition. In contrast, former world number one Martina Navratilova has complained that grunting masks the sound of the racket striking the ball, making it – unfairly – harder to predict the ball’s trajectory. The question of whether this common complaint is justified has now been examined in a new study by a team of sport psychologists from Friedrich Schiller University, Jena, led by Dr Florian Müller and Prof. Rouwen Cañal-Bruland.Experiment with manipulated grunting noisesFor this study, the research team conducted a series of experiments in which experienced players were shown video clips of rallies from a professional tennis match. After observing players hitting the ball, they had to work out the ball’s trajectory and indicate where it would land. Largely unnoticed by participants, though, the intensity of the grunting noises was manipulated.Grunting biases anticipation of ball flightResults indicate that grunting does have an effect – but not the one claimed by Navratilova. There was no evidence that grunting caused a distraction effect. In spite of the supposed irritation, participants’ level of error in predicting where the ball would land was the same – regardless of the intensity of the grunts. Instead, it was shown that the louder the grunting, the further the participants assumed the ball would fly. This reaction was observed even when the noises could only be heard after the racket had made contact with the ball, as is usual in many professional matches. “We assume that players account for the physiological benefits provided by grunting,” explains Müller. Other researchers have demonstrated that forcefully exhaling air activates the abdominal muscles, providing additional strength that enables players to hit harder, making the ball fly faster. “This possibly explains why an effect can be observed as a result of the grunting, but the ability to anticipate the ball’s trajectory remains unaffected.”Related StoriesProbing Submicron Protein Aggregation using Asymmetrical Flow Field-Flow Fractionation, AF4, and Light ScatteringHeat-induced heart attack risk on the rise, study showsResearchers discover how mosquitoes smell acidic volatiles in human sweatPerception in sport as the interplay of multiple sensory impressionsAccording to Müller and his colleagues, the results of the study suggest that Navratilova’s claim needs to be reconsidered. For the sport psychologists, it is also evidence that sensory impressions other than sight are of importance in sport as well, and that scientists should look at these more closely in future. For this reason, too, they want to stay ‘on the ball’ and investigate the phenomenon further. To get closer to real-world conditions, in the next step participants will have to catch a tennis ball on the touchscreen in real time. Ultimately, the experiment could even be conducted during a real match on a tennis court – as long as no one in the neighborhood is disturbed by excessively loud grunting.Source: https://www.uni-jena.de/en/190502_tennis_grunting.html read more

Digital prescriptions became compulsory on January 1, 2018 in Latvia Explore further Three Latvia regions under emergency due to African swine fever Citation: Latvia’s e-health system hit by cyberattack from abroad (2018, January 16) retrieved 18 July 2019 from https://phys.org/news/2018-01-latvia-e-health-cyberattack.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. Latvia said its new e-health system was on Tuesday hit by a large-scale cyberattack that saw thousands of requests for medical prescriptions pour in per second from more than 20 countries in Africa, the Caribbean and the European Union. © 2018 AFP No data was compromised, according to health officials, who immediately took down the site, which was launched earlier this month to streamline the writing of prescriptions in the Baltic state.”It is clear that it was a planned attack, a widespread attack—we might say a specialised one—as it emanated from computers located in various different countries, both inside the European Union and outside Europe,” state secretary Aivars Lapins told reporters. “We received thousands of requests in a very short space of time. That’s not the normal way the system works,” he said, adding that an investigation is under way. The site was back up and running within a couple of hours but with reduced functionality, forcing Latvia to provisionally revert to the previous paper system that was kept as a backup after digital prescriptions became compulsory on January 1. read more

Citation: Volkswagen to stash cars at Berlin’s problem airport (2018, June 27) retrieved 18 July 2019 from https://phys.org/news/2018-06-volkswagen-stash-cars-berlin-problem.html Combining Germany’s national embarrassments German prosecutors raid Audi boss over diesel cheating Car giant Volkswagen will stock cars awaiting strict new emissions tests at Berlin’s under-construction airport, combining the German national embarrassments of the carmaker’s “dieselgate” scandal and the much-delayed travel hub. “In this case, our normal logistics spaces aren’t enough,” a Volkswagen spokesman told AFP on Wednesday, saying the firm faces delays to emissions tests on between 200,000 and 250,000 cars.The firm will store vehicles at VW’s testing grounds near its Wolfsburg HQ as well as the Berlin airport and “is looking into other spaces,” he added.Like other carmakers, VW is scrambling to adapt to a new emissions testing regime known as the Worldwide harmonised Light vehicles Test Procedure or WLTP, forcing it to slow production in Wolfsburg as well as storing untested cars.WLTP is designed to more accurately reflect vehicles’ emissions performance under real driving conditions, making it longer and more complex than previous procedures.Volkswagen for years fooled regulators under previous testing regimes.It admitted in 2015 to building software known as a “defeat device” into 11 million diesel vehicles worldwide, reducing harmful emissions in the lab but allowing them to shoot up in on-road driving.Other carmakers like Daimler and BMW have since fallen under suspicion and this year were forced to recall thousands of vehicles for software updates.As a blow to Germany’s pride in its engineering prowess and reputation for honesty in business, the endless, convoluted “dieselgate” scandal has been matched in recent years only by the succession of disasters at Berlin’s new international airport.First slated to open in 2011, the opening of the hub named for former Chancellor Willy Brandt has been repeatedly pushed back over issues ranging from fire safety to structural integrity.Meanwhile, one former manager at the project was jailed in 2016 for accepting a bribe and prosecutors said last year they were probing another.Authorities now hope to open the doors—another of the many technical problems at the troubled airport—by October 2020. 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 AFP read more

Citation: Nvidia buys Israeli chipmaker Mellanox for $6.9 bn (2019, March 11) retrieved 17 July 2019 from https://phys.org/news/2019-03-chipmaker-nvidia-mellanox-billion.html US computer graphics giant Nvidia said Monday it is acquiring Israeli data center firm Mellanox for $6.9 billion, to expand its presence in the high performance computing segment. Explore further Fiserv buys First Data for $22B, creating fintech giant The combined firm will have the capacity to “optimize data center” performance for applications in cloud computing and artificial intelligence, according to a statement by the firms.”The emergence of AI and data science, as well as billions of simultaneous computer users, is fueling skyrocketing demand on the world’s data centers,” said Jensen Huang, founder and chief executive of California-based Nvidia.”Addressing this demand will require holistic architectures that connect vast numbers of fast computing nodes over intelligent networking fabrics to form a giant data center-scale compute engine.”The all-cash deal is expected to close later this year subject to regulatory and shareholder approval.The deal will expand the offerings of Nvidia, which produces chips and other technologies for video games, facial recognition systems and autonomous vehicles.The companies have previously collaborated in building the world’s two fastest supercomputers, Sierra and Summit, operated by the US Department of Energy.Eyal Waldman, co-founder and CEO of Mellanox, told a news conference in Tel Aviv he believes the tie-up can “build the future architecture of the future computing rooms.””Together we will be able to create much more efficient systems of computing, of connectivity and of storage,” Waldman said. © 2019 AFP 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. California-based Nvidia struck a deal to acquire Israeli chipmaker Mellanox to create a bigger presence in high-performance computing read more

rivers The Tamil Nadu Government had turned down the request saying the century-old reservoir was ‘safe’ enough to store water up to 142 feet. water (natural resource) COMMENTS Kerala SHARE Tamil Nadu Deputy Chief Minister O Panneerselvam has said rumours are being spread over the stability of Mullaperiyar dam with an aim to create a wedge between the people of the State and Kerala, asserting that the reservoir is ‘safe’ to store water up to 142 feet.“Experts have opined that water could be stored upto 142 ft.. There is no need to fear.. The dam is strong.. the dam will not be affected even if there is a tremor or quake,” Panneerselvam told reporters here last night, after visiting the Kumuli road, which got damaged due to a landslide. “People of Kerala are our brothers and sisters.. Some people are trying to create misunderstanding between us,” he said referring to the rumours doing rounds on social media platforms that the Mullaperiyar dam has developed some cracks.The Deputy Chief Minister’s statement comes following a plea made by flood-hit Kerala on August 15, for reducing the water level in the Mullaperiyar reservoir to 139 feet over safety concerns in view of heavy inflows.The Tamil Nadu Government had turned down the request saying the century-old reservoir was ‘safe’ enough to store water up to 142 feet.Kerala Chief Minister Pinarayi Vijayan had also sought the Centre’s intervention due to concerns over the dam’s safety in view of the swelling inflows.The Supreme Court had on August 16 directed the disaster management sub-committee of Mullaperiyar dam to consider reducing the water level up to 139 feet from the present 142 feet, considering the “grave” flood situation in all the 14 districts of Kerala.The two States are locked in a dispute over the storage level in the dam, situated in the high-range Idukki district of Kerala, which has been raising concerns about the safety of people living downstream. SHARE SHARE EMAIL Tamil Nadu COMMENT Published on August 19, 2018 read more

Next BJP MLA’s daughter, Dalit partner likely to marry in court next weekSources said BJP MLA’s daughter Sakshi Misra and her partner will get their marriage registered in court on July 16 after making a request to the court.advertisement Indo-Asian News Service LucknowJuly 13, 2019UPDATED: July 13, 2019 10:16 IST Their inter-caste wedding created a huge controversy.Sakshi Misra, the daughter of a BJP MLA from Uttar Pradesh, and her husband were now expected to opt for a registered marriage in court, after their inter-caste wedding created a huge controversy.Sakshi is a Brahmin, while her husband Ajitesh Kumar belongs to a Dalit family.This is being done after the priest of the Ram Janki temple in Prayagraj, where they reportedly exchanged vows and even have a certificate to prove that they tied the knot, denied the marriage, adding that the certificate was fake.According to sources, the couple will be appearing in the Allahabad High Court where their petition will be taken up for hearing on July 15.”They will get their marriage registered in court on July 16 after making a request to the court itself,” the sources said.Sakshi and her husband, who have been on the run since July 3 when they left their respective homes, made an appearance on Friday on a news channel where they again alleged that the Bharatiya Janata Party MLA from Bareilly, Rajesh Misra was against their marriage purely on caste grounds.The couple and Ajitesh’ father Harish Kumar have alleged that SSP Bareilly Muniraj G had refused to respond to their calls for protection and security.However, after the matter hit the headlines, the SSP has now said that the couple would get police protection so that they can safely appear before court.READ | Bareilly BJP MLA’s daughter who married Dalit moves court, seeks protectionALSO READ | Soch badlo papa: BJP MLA’s daughter who married Dalit boy makes emotional appeal to dad on live TVALSO WATCH | Please change your thinking: BJP MLA’s daughter’s emotional appeal to her fatherFor the latest World Cup news, live scores and fixtures for World Cup 2019, log on to indiatoday.in/sports. 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 byKritika Bansal Tags :Follow BJP MLA read more