It is husband's duty to maintain wife and son: Court

Thiruvananthapuram, Apr 5: Eight more COVID-19 positive cases were reported from Kerala on Sunday, four among whom attended the Tablighi Jamat congregation in Delhi and six people were cured, Health Minister K K Shailaja said.

With this, the total number of affected people under treatment in the state has gone up to 256, she said.

"Out of the eight cases, five are from Kozhikode, and one each from Pathanamthitta, Kannur and Kasaragod districts.

In the case of Kozhikode, four out of the five returned from Nizammuddin meet and one from Dubai.

As of date, 10 people who had returned from Nizammuddin in Delhi have been tested positive," the minister said in a release

A total of 314 cases have been reported from Kerala so far and 56 people have been cured, she said

"We have sent 10,221 samples for testing," she said.

A total of 1.58 lakh people are under observation in the state, out of which 776 are in isolation wards in hospitals.

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.

New Delhi, Jun 11: Petrol and diesel prices on Thursday were hiked by 60 paise per litre each - the fifth straight daily increase in rates since oil PSUs ended an 82-day hiatus in rate revision.

Petrol price in Delhi was hiked to Rs 74 per litre from Rs 73.40 while diesel rates were increased to Rs 72.22 a litre from Rs 71.62, according to a price notification of state oil marketing companies.

Rates have been increased across the country and vary from state to state depending on the incidence of local sales tax or VAT.

This is the fifth daily increase in rates in a row since oil companies on Sunday restarted revising prices in line with costs, after ending an 82-day hiatus.

In five hikes, petrol price has gone up by Rs 2.74 per litre and diesel by Rs 2.83.