Udupi: Girl child found murdered a day after she was allegedly kidnapped

Mangaluru, May 5: The Dakshina Kannada district administration has denotified two containment zones, Sampya in Puttur and Thumbe in Bantwal. They were declared containment zones after one coronavirus positive case was reported from each area.

All the primary and secondary contacts of the patients have completed home quarantine period, said DC Sindhu B Rupesh.

The district administration hitherto had already denotified three other such containment zones based on a report of DHO,  after no new case was reported in the area in the last 28 days.

At present, the district has six containment zones-- Shakthinagara, Boloor, First Neuro Hospital in Mangaluru city, Uppinangady in Puttur, Kasaba and Narikombu in Bantwal taluk.

Bengaluru, Jun 4: The Special Investment Promotion Task Force, constituted by the Karnataka government, held its first meeting in Vidhana Soudha, Bengaluru on Wednesday, June 3.

The first meeting of the task force was held under the chairmanship of Chief Secretary, Karnataka government.

The body is seeking to find ways to attract the disenchanted multi-national corporations (MNCs) which are looking to shift their manufacturing base away from China in the back-drop of the COVID-19 outbreak.

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.