BJP workers arrested for attacking Union Minister's house during Anti-CAA protest

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 13: Tibetan spiritual leader the Dalai Lama has congratulated AAP supremo Arvind Kejriwal for his party's stupendous victory in the Delhi Assembly polls, saying the people of the national capital will continue to benefit from his leadership.

Responding to the Dalai Lama's statement, Kejriwal in a tweet on Wednesday said, "Am humbled by the kind words and blessings from His Holiness The Dalai Lama. Thank you very much @DalaiLama."

Referring to the Happiness Curriculum for government schools in Delhi, the Dalai Lama said he has a deep admiration for the efforts the AAP government has made towards "shaping better, happier human beings with improved values".

"These measures will have a positive impact on children's overall education, as well as helping the poor to fulfil their dreams of improving their lives," he said.

He also lauded the AAP government's initiative to incorporate aspects of inner mental development into the school curriculum.

"Through such initiatives, you are showing a path to the rest of India," the Dalai Lama added.

In a near-repeat performance of 2015, the Aam Aadmi Party on Tuesday retained power with a stunning victory, winning 62 of the 70 assembly seats and leaving the BJP with just eight seats.

Jan 27: Bollywood Film Director Anurag Kashyap, who has been vocal about his political views on social media, slammed Union Minister Amit Shah and accused him of being 'cheap'.

"How timid our Home Minister is. Its own police, its own goons, its own army and security increases and invades unarmed protestors. Amit Shah has crossed the extent of cheapness and inferiority. History will spit on this animal," Kashyap tweeted.

The film director has taken an active part in the anti-Citizenship Act protest rallies and was against the Jawaharlal Nehru violence. He also came in support of his contemporary Deepika Padukone when the latter faced backlash for showing up at JNU in support of the students.