Indian Army soldier dies after being hit by stone thrown by youth in Anantnag

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 29: The father of Intelligence Bureau staffer Ankit Sharma, whose body was pulled out of a drain in northeast Delhi's riot-hit Chand Bagh, complained to police that goons had assembled at the residence of former AAP counselor Tahir Hussain and were throwing petrol bombs from the rooftop.

According to the FIR which was registered on Thursday on the basis of the complaint lodged by Ankit's father Ravinder, the goons were also firing from the rooftop.

On Tuesday, Ankit returned from his office at 5 pm and then went outside to buy groceries. When he did not return, the family started looking for him and later filed a missing report, the FIR stated.

They got to know from their neighbours that a body has been recovered from a drain… later it was found to be that of Anikt, it said, adding the body had multiple stab injuries on the face, head, back, and chest.

The family has alleged in the FIR that it was Hussain and the goons at his residence who killed Ankit. In the FIR, Hussain has been accused of murder, destruction of evidence and abduction.

Soon after the FIR was registered on Thursday, the AAP suspended Tahir Hussain from the primary membership of the party till the police completed its probe.

The death toll in Delhi's communal violence rose to 42 on Friday as the situation showed some signs of returning to normalcy and clouds of smoke cleared to reveal the extent of the damage from the worst riots in the city in over three decades.

A total of 148 FIRs have been registered and 630 people have been either arrested or detained so far in connection with the communal violence, a Delhi Police spokesperson said.

New Delhi, Jun 18: Prime Minister Narendra Modi on Thursday said he is "deeply grateful" for the overwhelming support shown by the global community for India''s membership of the UN Security Council.

India will work with all member countries to promote global peace, security, resilience and equity, he said.

India garnered 184 votes out of the 192 ballots cast in the General Assembly to win the election for the non-permanent seat in the powerful Security Council.

India''s two year term will begin on January 1, 2021.

This is the eighth time that India will sit at the UN high-table, which comprises five permanent members and 10 non-permanent members.

"Deeply grateful for the overwhelming support shown by the global community for India''s membership of the UN Security Council," the prime minister wrote on Twitter.

India will work with all member countries to promote global peace, security, resilience and equity, he said.