SC pulls up Karnataka for seeking Rs 15 lakh for Ma’adani’s escort

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, Feb 16: RSS chief Mohan Bhagwat on Saturday said everyone is unhappy in the society and constantly agitating notwithstanding a "many-fold rise" in materialistic comforts and pleasures.

Addressing a gathering of Sangh workers and intellectuals here in Gujarat, Mr Bhagwat also said that even political parties who are not in power are also agitating.

"Inspite of increase in comforts and materialistic pleasures, everyone is unhappy and is staging agitations. Be it owner or servant, a party in opposition, the common man students, teachers, everyone is unhappy and dissatisfied," the Rashtriya Swayamsewak Sangh (RSS) chief said.

He was speaking on the topic "India's Role in the Present World Context".

Mr Bhagwat further said that bigotry, violence and terrorism are on the rise in the present world.

"India has to give 'dharma'  (wisdom) to the world so that knowledge spreads but humans do not become robotic. We have always talked about the concept of global family but not global market," he said.

The lecture was organised by "Madhav Smruti Nyas", an organisation backed by the RSS.

"To think that we are living in a better world is a half truth. Facilities are not evenly distributed. Rule of Jungle is prevailing. A capable person is crushing the weak to climb up. Knowledge is used more for the destruction of the world," the Sangh chief said.

Mr Bhagwat said people are also misusing social media by spreading "false information" to create controversies.

He also stated that trying to put "everyone into one uniform" is also a form of bigotry.

"US and Russia are super powers. China would become a super power too. Now, what super power nations did to others? They just took control of other countries for their own selfish agenda. These super powers gave it back only when they were asked to do so. Otherwise, they never gave anything to others," said Mr Bhagwat.

Bengaluru, Jul 16: Former Prime Minister and JDS supremo H D Devegowda on Thursday gave a clarion call to party workers to take steps to strengthen the party from the grossroots level and to 'expose the failures' and 'anti-people' policies of BJP government both at the Centre and State.

In an open letter to the workers here, he alleged that the urgent need is to create awareness among the people about failure of the governments which have brought in policies which are deterrent to the poor and downtrodden.

BJP government headed by Chief Minister B S Yediyurappa in Karnataka has come up with an amendment to the Land Reforms Act,1961, which is 'against' interests of the small and medium farmers as even a non-agriculturist can purchase agriculture land, thus giving an opportunity to the rich people to 'exploit' illiterate farmers and purchase their land and use it for some other purpose after some time.