Man assaulted over inter-community marriage

Mangaluru, Mar 27: A youth from Dakshina Kannada district, who had returned from United Arab Emirates earlier this month has tested positive for the deadly Covid-19 caused by the novel coronavirus. With this the total of Covid-19 in the district has mounted to seven. 

The fresh Covid-19 patient is a 21-year-old youth hailing from Karaya in Belthangady taluk. 

He had left Dubai on March 21 and land at Bengaluru Airport. Then he reached Belthangady through a KSRTC bus the very next morning. 

As he was suffering from fever and cough, he was admitted to Puttur government hospital on March 24. Same day his throat swab sample was sent for coronavirus testing. Today it was declared positive. 

His condition is said to be stable. However, his family members and those who were in touch with him are under observation.

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.

Mangaluru, Feb 13: A college student was killed when a bullet tanker knocked his motorbike down near Nanthoor Circle in the city today. 

The deceased has been identified as Karthik Malya, a resident of Mannegudda. He was a final year degree student of Besant College in the city. 

The incident took place when Karthik was from Suratkal to Mangaluru. The bullet tanker reportedly hit the two-wheeler from behind and ran over him. He died on the spot.