Hindu family coverts to Islam after facing social boycott

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.

Bantwal, Jun 16: Two unmarred siblings committed suicide by self-immolation at Sangabettu in Bantwal taluk of Dakshina Kannada last night.

Neelayya Shettogar (42) and his sister Kesari (39) poured petrol on themselves before torching themselves at around 11 p.m. on June 15 inside a room of their house, police sources said. The siblings were reportedly facing health problems.

Neelayya's brother and latter’s wife were sleeping in the other room of the same house when the incident took place. They came to know only when they heard the screams of the duo.

Even though the siblings were rushed to the government hospital at Bantwal with the help of locals, the doctors declared them dead.

Bantwal rural police sub-inspector, Prasanna and staff visited the spot as part of investigation.

Bengaluru, Mar 21: All bars and pubs in Karnataka will remain closed from Saturday till March 31 as a preventive measure to tackle coronavirus spread, said state Chief Minister B S Yeddyurappa.

As per the government advisory, restaurants including cafes cannot serve food in-house and only takeaways will be allowed.

"All bars/pubs to remain closed from tomorrow till March 31 in Karnataka. In all city municipal corporations across the state, restaurants including cafes cannot serve food in-house, only takeaways will be allowed," said Yeddyurappa in a statement.

15 people have tested positive for COVID-19 in the state till now, said Karnataka Health Minister B Sriramulu on Friday.

The Minister told news agency that two COVID-19 patients, who are recovering, will soon be discharged from the hospital.

The total number of COVID-19 cases in India has now climbed up to 223, including 32 foreigners, the Union Health Ministry said on Friday. As many as 23 people have been cured of the infection in India.

The disease has claimed over 10,000 lives globally.