Pakistan police arrest top Barelvi leader who led Asia Bibi protests

Chennai, Feb 20: Three people, including an assistant director were killed and 9 others injured when a crane used for the shooting of “actor Kamal Haasan starrer “Indian 2” film crashed down at Nazarathpet near Poonamallee here late on Wednesday night.

Police said the accident occurred when a group of workers were engaged in erecting a set for a scene at EVP film city, private studio. As the crane crashed down, a heavy-duty light stand that was mounted on it also fell on the workers.

Mr Haasan and the film director S.Shankar escaped unhurt in the accident.

The deceased were identified as Krishna (34), an assistant director of the film, Madhu (29) and Chandran (60), who was part of the catering team.

Tamil Nadu Fire and Rescue Services personnel, along with a fire tender from Irungattukottai rushed to the spot and retrieved the bodies from the spot.

Mr Haasan, who was at the accident spot, also helped to transport the injured people to a private hospital near Poonamallee.

The bodies were sent to the Government General Hospital for post-mortem.

The Nazarathpet police have filed a case and are investigating the cause of the accident.

Meanwhile, Mr.Haasan condoled the death of three people during the film shoot. “The accident is the most horrific I have seen in my film career. I have lost three colleagues, but my pain pales in comparison to the grief of those who have lost their loved ones.

My deepest sympathies to them, he tweeted.

The Lyca productions also expressed condolences over the tragic accident. “We are extremely saddened with the unfortunate accident happened at the sets of Indian 2. We have lost three of our most hardworking technicians, it tweeted.

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.