Cong approaches EC seeking safety, security of its Guj MLAs

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, Feb 18: Election strategist-turned-politician Prashant Kishor on Tuesday questioned the Nitish Kumar government's development model, even as he sneered at the chief minister for making ideological compromises to stay in an alliance with the BJP.

Kishor, who has been vocal about his opposition to the Citizenship (Amendment) Act (CAA), said Kumar needs to spell out whether he is with the ideals of Mahatma Gandhi or those who support Nathu Ram Godse.

"Nitish ji has always said that he cannot leave the ideals of Gandhi, JP and Lohiya... At the same time, how can he be with the people who support the ideology of Godse? Both cannot go together. If you want to stay with the BJP, I don't have any problem with it but you cannot be on both sides," he said.

"There has been a lot of discussion between me and Nitish-ji on this. He has his thought process and I have mine. There have been differences between him and me that the ideologies of Godse and Gandhi cannot stand together. As the leader of the party you have to say which side you are on," he added.

In a direct assault on Kumar's model of governance, Kishor said Bihar was the poorest state in 2005 and continues to be so.

"There has been development in Bihar during the last 15 years, but the pace has not been as it should have," he added.

Mumbai, Jan 7: Facing criticism from social media and political quarters for holding a 'Free Kashmir' poster during a protest against violence at Jawaharlal Nehru University (JNU), Mehak Prabhu, a Mumbai-based storyteller, on Tuesday clarified that she meant to highlight the restrictions imposed in Jammu and Kashmir and wishes to see peace in the region, adding she had no other motive behind her actions.

"At around 7 pm yesterday, I reached where the protest was happening at the Gateway of India. Like anybody else who believes in democracy, I also joined that protest. We were standing for justice to the JNU students," Prabhu said in a video posted on Facebook.

"I saw a bunch of people who were painting placards on every issue like NRC, CAA and for JNU students. There was a placard lying on the side which said 'Free Kashmir'. The first thing which came to my mind when I saw that placard was about the basic constitutional rights of Kashmiris," she said.

Prabhu also said that she was not a Kashmiri and was brought up in Mumbai. She outlined that she was standing with a flower in her hand and asserted that the entire matter was "completely blown out of proportion".

"I was quietly standing with a flower in my hand. This means we need to make peace together. That was my only intention in holding that placard. The narrative that has been put out is absolutely wrong," she said, describing the reactions to the matter was "crazy".

The Mumbai-based storyteller underlined that the incident is scary and urged the people to spread the words of what she said and not hatred.

"The way it has gone, it is very scary. I am a simple person. As a woman, it is very scary for my safety right now. Spread this side of my story and let's stop it here. Let us not spread the hate. It has happened to me, it can happen to anyone. We should not live in fear," Prabhu further said.