Kashmiri woman Iram Habib gives wings to her aspirations

Kodagu, Mar 19: One more person has tested positive for coronavirus in Kodagu on Thursday, taking the tally of confirmed cases in the state to 15.

The man has a travel history to Saudi Arabia.

"One person has tested positive for #COVID19 in Kodagu today; he has travel history to Saudi Arabia. He is being treated in an isolation hospital. Total number of positive cases reaches 15 in the state," said B Sriramulu, Karnataka Health Minister.

A total of 169 positive cases of coronavirus have been reported in India so far, the Union Ministry of Health and Family Welfare said on Thursday.

Globally, the virus has infected more than 184,000 people and killed more than 7500, as per the data available on the World Health Organisation website.

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.

Thiruvananthapuram, Mar 18: Bindhu Sampath, the mother of Nimisha alias Fathima who travelled from Kerala to Afghanistan to join the Islamic State (IS), has sought the Central government's help to bring her daughter back to India.

"I saw a video of my daughter in which she was requesting her return to India. She has realised that India is her country, not Afghanistan. She is scared that she'll be put in jail over there. Responding to my mail, the Afghanistan government has said that the procedure will take time," said Bindhu Sampath.

"I believe in Indian laws. Let her be questioned and realise what is good or bad. I am waiting for the Central government's confirmation on the matter," added Sampath.

Around four years back, a team of 21 members which consisted of couples and children went to Syria from Kerala to join ISIS and lead an Islamic life. After they left, police registered a case against them, which has been handled by the National Investigation Agency.