Kathua temple rape: Petition filed seeking urgent hearing against torture on social activist

London, May 20: The current physical distancing guidelines of 6 feet may be insufficient to prevent COVID-19 transmission, according to a study which says a mild cough in low wind speeds can propel saliva droplets by as much as 18 feet.

Researchers, including those from the University of Nicosia in Cyprus, said a good baseline for studying the airborne transmission of viruses, like the one behind the COVID-19 pandemic, is a deeper understanding of how particles travel through the air when people cough.

In the study, published in the journal Physics of Fluids, they said even with a slight breeze of about four kilometres per hour (kph), saliva travels 18 feet in 5 seconds.

"The droplet cloud will affect both adults and children of different heights," said study co-author Dimitris Drikakis from the University of Nicosia.

According to the scientists, shorter adults and children could be at higher risk if they are located within the trajectory of the saliva droplets.

They said saliva is a complex fluid, which travels suspended in a bulk of surrounding air released by a cough, adding that many factors affect how saliva droplets travel in the air.

These factors, the study noted, include the size and number of droplets, how they interact with one another and the surrounding air as they disperse and evaporate, how heat and mass are transferred, and the humidity and temperature of the surrounding air.

In the study, the scientists created a computer simulation to examine the state of every saliva droplet moving through the air in front of a coughing person.

The model considered the effects of humidity, dispersion force, interactions of molecules of saliva and air, and how the droplets change from liquid to vapour and evaporate, along with a grid representing the space in front of a coughing person.

Each grid, the scientists said, holds information about variables like pressure, fluid velocity, temperature, droplet mass, and droplet position.

The study analysed the fates of nearly 1,008 simulated saliva droplets, and solved as many as 3.7 million equations.

"The purpose of the mathematical modelling and simulation is to take into account all the real coupling or interaction mechanisms that may take place between the main bulk fluid flow and the saliva droplets, and between the saliva droplets themselves," explained Talib Dbouk, another co-author of the study.

However, the researchers added that further studies are needed to determine the effect of ground surface temperature on the behaviour of saliva in air.

They also believe that indoor environments, especially ones with air conditioning, may significantly affect the particle movement through air.

This work is important since it concerns safety distance guidelines, and advances the understanding of the transmission of airborne diseases, Drikakis said.

New Delhi, Jun 28: Home Minister Amit Shah on Sunday targeted former Congress President Rahul Gandhi, saying he was indulging in "shallow-minded" politics and making statements that make Pakistan and China happy when soldiers are fighting a spirited battle.

Shah said the government is ready for a discussion in Parliament about the situation from 1962 (when India-China war took place) and it is sad that a former president of a party making statements, which are being celebrated in Pakistan and China.

The Home Minister's comments came during an interview with ANI when he was asked about Rahul's "Surrender (Prime Minister Narendra) Modi" remarks while criticising the BJP-led government on India-China border row.

Rahul has been consistent in his criticism of the government on the handling of both Covid-19 situation and India-China border row, which escalated into a "violent face-off" earlier this month in which 20 Indian soldiers were killed.

"Let there be a robust debate in Parliament. Let us have one. Let us discuss from 1962. Nobody is scared of debate. But one should not make a statement that makes Pakistan and China happy when the soldiers are fighting a spirited battle and the government is taking strong steps," he said.

Asked whether India can handle the anti-India propaganda unleashed by Rahul's 'Surrender Modi' hashtag, he said the government is capable of handling it but it is a matter of introspection for the former Congress president and his party that their remarks are being used against the country.

Modi's remarks at an all-party meeting that no one has intruded into Indian territory triggered a controversy with a section arguing that it went against the previous statement of External Affairs Minister S Jaishankar.

Claiming that he could not advise Rahul as it is Congress' job to do so, he said the government has fought Covid-19 well but some people have a twisted way of seeing things. He said India fought well against Covid-19 and the statistics will speak for itself as it is much better compared to the world.

Shah said under Modi's leadership, India is going to win both the battles -- Covid-19 and India-China border row.

The Home Minister also refused to be drawn into a question on whether Chinese soldiers are holding on to Indian territory on the border at present, saying the government is doing enough to address border row with China.

"I don't want to do anything that goes against my primary aim of this interview (to highlight the steps taken to fight Covid-19 pandemic in Delhi) and create headlines that keep citizens further in fear," Shah said.

When pointed out that people are also in panic due to the border situation, he said the government has taken steps to address the situation and at an appropriate time he would make comments, if needed.

Asked about his tweets on Emergency, which was targeted by Congress asking whether there is democracy in the BJP, he countered it saying that BJP has presidents L K Advani followed by Rajnath Singh, Nitin Gadkari, Rajnath again, himself and now J P Nadda.

"After Indira-ji, was there any Congress President from outside Gandhi family? What democracy do they talk about? I did not do any politics during Covid-19. You look at my tweets of the past 10 years. Every June 25, I give a statement," he said.

"Emergency should be remembered by people as it attacked the roots of our democracy. No one should ever forget it. There should be awareness about it. It is not about a party but about the attack on the country's democracy," he said.

Patna, Jun 25: At least 83 people died due to thunderstorms in Bihar in the last 24 hours, according to Chief Minister's Office.

Bihar Chief Minister Nitish Kumar announced Rs 4 lakhs each for the families of deceased.

Thirteen people died in Gopalganj, 8 each in Madhubani and Nawada, 6 each in Baghalpur and Siwan, 5 each in Darbhanga, Banka, East Champaran and 3 each in Khagaria and Aurangabad.

Due to thunderstorms, two people each lost their lives in West Champaran, Kishanganj, Jamui, Jahanabad, Purnia, Supaul, Buxar, Kaimur while one death each was reported in Samastipur, Shivhar, Saran, Sitamarhi and Madhepura.