Muslims already affected by CAA, let Rajinikanth raise voice for them: Kanimozhi

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.

Bijnor: A 17-year-old Dalit youth was shot dead by four miscreants belonging to the upper caste of Hinduism after the former tried to enter a temple in Uttar Pradesh.

The deceased was identified as Vikas Jatav. The accused had tried to stop the deceased from entering into a temple. 

On being stopped from entering the temple located in Domkhera village, Jatav raised and objection and started arguing with the accused. 

The accused were identified as - Lala Chauhan, Horam Chauhan, Bhushan and Jasveer. The incident took place on May 31, according to the father of the deceased. 

How it happened 
On May 31, Jatav went to a temple in Domkhera to offer his prayers. The four accused, however, did not let him go inside. Following this, an argument broke out between the accused and the 17-year-old boy. 

On the same day, the victim approached the police and lodged a complaint in relation to the incident. The police, however, did not take any action against the accused men. 

Late night on Saturday, Jatav was sleeping inside his house when the four men barged in and opened fire at him. 

Hearing the gunshots, Jatav's family rushed to rescue him, following which, the accused escaped. Vikas was profusely bleeding after being shot and succumbed to the injuries before he could reach the hospital. 

Lala Chauhan and Horam were nabbed by the police while the other two are still at large. The four accused have been booked under section 302 (murder) of the Indian Penal Code (IPC) and the SC/ST Act.

Noida, Jan 6: A fire broke out at the ESIC Hospital in Noida on Thursday morning and firefighting was underway, officials said.

The blaze broke out in the basement of the seven-storey hospital building located in Sector 24, a police official said.

Fire tenders were rushed to the spot after the Fire Department was alerted about it around 8 am, the official said.

After that, a search was done to see if anyone was trapped in the building, he said.

The cooling process is now underway.

He said the fire had engulfed the ground, first and second floors of the building, except the basement.

Police said they received information about fire at Kaveri printing press at 2:45 am, when the manager Yogesh called them. The press owners have been identified as Atul and Anuj Goyal, residents of Sukhdev Vihar, they said.

The man who died in the fire has been identified as Phool Dev, from Bihar, who used to work as a help there. Dev went inside the building in the night to sleep before the fire started and died due to suffocation, the fire department official said.

The body has been kept at Lal Bahadur Shastri Hospital and the post-mortem will be done once the family reaches here, police said.