Prakash Rai walks the talk: Kamal Haasan

New Delhi, Jan 27: Remember the story of two friends coming face-to-face with a bear in a forest? One of the two friends climbs the tree to save his life and the other, not knowing how to, lays on the ground, breathless, pretending to be dead.

Well, that lesson turned out to be useful for this man who pretended to be dead when a tiger had both his paws on the man's chest.

Yes, that is right. IFS officer Parveen Kaswan recently shared a video of a man lying under a tiger, with their faces extremely close to each other with the caption, "You want to see how does a narrow escape looks like in case of an encounter with a #tiger. #Tiger was cornered by the crowd. But fortunately, the end was fine for both man and tiger. Sent by a senior."

You want to see how does a narrow escape looks like in case of encounter with a tiger. Tiger was cornered by the crowd. But fortunately end was fine for both man and tiger. Sent by a senior. pic.twitter.com/1rLZyZJs3i

— Parveen Kaswan, IFS (@ParveenKaswan) January 25, 2020

Another Twitter user shared the full 30-second video in the comments. He also said that the incident occured in Tumsar in Bhandara district, Maharashtra. The spine-chilling clip shows a tiger running freely in the fields trying to avoid people who have surrounded him and are trying to shoo him away.

Here's the full video pic.twitter.com/Avvci4Bnhg

— January 25, 2020

In his quest to run away, the scared tiger grabs a human. When he sees that people are still approaching him and trying to scare him away, he gets up and runs away for his life. All this while, the man who was captured by the animal lays still on the ground and does not make an attempt to get free.

This is what stuck with Twitter and they are praising the man for his presence of mind.

New Delhi, Jun 16: With an increase of 10,667 cases and 380 deaths in the past 24 hours, the COVID-19 count in India has reached 3,43,091 on Tuesday, according to the Union Health and Family Welfare Ministry.

It is noteworthy that today's spike in cases is lower than the 11,502 registered in the country yesterday and has also stayed below the 11 thousand mark it had been crossing for the past two days in a row.

However, there is an increase in the number of deaths due to the infection from yesterday, with 380 deaths being reported from across the country, the toll due to COVID-19 has now reached 9,900.

The COVID-19 count includes 1,53,178 active cases, while 1,80,013 patients have been cured and discharged or migrated so far.

Maharashtra with 1,10,744 cases continues to be the worst-affected state in the country with 50,567 active cases while 56,049 patients have been cured and discharged in the state so far. The toll due to COVID-19 has crossed the four thousand mark and reached 4,128 in the state.
It is followed by Tamil Nadu with 46,504 and the national capital with 42,829 confirmed cases.

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.