PM Modi shares pic with Priyanka and Nick, wishes them ‘happy married life'

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.

London, Mar 19: "Game of Thrones" star Indira Varma has revealed that she has tested positive for coronavirus.

Her diagnosis comes two days after fellow "Game of Thrones" actor Kristofer Hivju also said that he tested positive for the COVID-19 infection.

Varma, who played the role of Ellaria Sand in the epic HBO series, took to Instagram on Wednesday to share the news.

"I'm in bed with it and it's not nice. Stay safe and healthy and be kind to your fellow people," she wrote.

The 46-year-old actor was starring in the modern take of Anton Chekhov's play "The Seagull" in London's West End, alongside "Game of Thrones" alum Emilia Clarke.

The play is on hold due to the pandemic.

"So sad our and so many other shows around the world have gone dark affected by the Covid-19 pandemic. We hope to be back soon and urge you all (and the govt) to support us when we do. Phoenix/ Seagull rising from the ashes (sic)," Varma wrote in her post with photos from the rehearsals.

Varma and Hivju join Tom Hanks, Rita Wilson, Idris Elba, Olga Kurylenko, and Rachel Matthews among the Hollywood celebrities who contracted the virus.

New Delhi, Feb 24: Indian Idol 11 winner is Bhatinda's Sunny Hindustani. Sunny, who mostly sang Nusrat Fateh Ali Khan's songs on the show, won the coveted trophy. The Bhatinda boy took home the Indian Idol 11 trophy along with the prize money of Rs 25 lakh, a car and a singing contract with T-Series.

Sunny's entry on the show was much-talked-about. His soul-soothing voice had mesmerised the judges on the audition day itself as he sang Afreen Afreen. He got a standing ovation and former Indian Idol 11 judge Anu Malik even said that he felt as if Nusrat Fateh Ali Khan himself was performing on the Indian Idol stage. His audition video had gone viral after Anand Mahindra shared it on social media.

On the finale night, Sunny sang a medley of songs, which included Mere Rashke Qamar and Halka Halka Suroor. Ayushmann got emotional seeing Sunny's journey on screen. He said, "Hum na actor bade self-obsessed hote hain. Humein lagta hai hamari struggle sabse achchi hai, sabse badi hai. Inke saamne toh kuch hai he nahi. Jahaan se aye hai, jitna hunar inke paas hai...mujhe lagta hai inki maa sabse ameer hain."

The first and second runner-up of the show Rohit Raut and Ankona Mukherjee got Rs 5 lakh each, while Ridham Kalyan and Adriz Ghosh who were fourth and fifth on the show, took Rs 3 lakh home. Every finalist also received Rs 1 lakh cheque from Lotus Herbals and gift hampers from the sponsors.