HJV leader Jagadish Karanth arrested over communal remarks against Puttur cop

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, Mar 12: TMC MP Saugata Roy said Home Minister Amit Shah should resign for "failing" to control the riots in Delhi and demanded a judicial inquiry by a sitting Supreme Court judge.

Participating in a discussion on the violence in Delhi in Lok Sabha, Roy said the Delhi riots happened 72 years after Mahatma Gandhi was killed by a Hindu fanatic.

"Gandhiji has been murdered again in Delhi by, you know who," Roy said while addressing the Chair.

Taking on BJP MP Meenakshi Lekhi for defending BJP leaders for their controversial remarks, which he claimed instigated the violence, Roy said he has seldom heard such a communal speech ever.

Dubbing the BJP MP as "Devil's Advocate", Roy said, "She spent five minutes defending the most hated man. May I quote (William) Shakespeare and call her the Devil's Advocate?...She is the best Devil's Advocate possible. She has also been an advocate for the Delhi Police which has shown total inaction and ineptness in this whole riot in Delhi."

Thereafter Roy trained his gun at Shah, who was present in the house while the TMC MP was speaking.

He said that when the riots started on February 24, Home Minister Shah was sitting in the front row at Motera Stadium (in Gujarat) welcoming US President Donald Trump.

"When Mr. Shah should have been in Delhi Police control room, he was welcoming Mr. Trump at Motera. There was no order to the police. Then on 25th, things went out of control. Armed mobs fought with each other on the streets of Delhi," Roy said.

Demanding resignation of Shah, Roy raised questions on NSA Ajit Doval's visit to the riots-affected areas on February 26 and asked what was the Home Minister doing.

"Is it NSA's business to control ordinary law and order situation? Why was the Home Minister absent in action? There is no explanation for the same," he said.

The TMC leader said he feels bad standing face-to-face with Shah.

"He is still young, he has a good future. He should acknowledge responsibility for his failure to control or stop Delhi riots and bring peace in three days. In the name of God, go and do not stay in the Home Minister's position," Roy said, adding he is the man who could not prevent riots in Delhi, at a place 10 kilometres away from the Home Ministry.

Roy demanded a judicial inquiry into the riots by a sitting Supreme Court judge and complete rehabilitation for all the riot victims.

Bengaluru, Jul 17: Lashing out at Chief Minister BS Yediyurappa-led government over the handling of coronavirus crisis, Karnataka Congress chief DK Shivakumar on Thursday demanded Governor's rule in the state. He also took a dig at Health Minister B Sriramulu's "Only God can save us" remark.

"I heard the statement of Sriramulu and Sudhakar. They have said that they cannot manage this (coronavirus crisis) and they leave it to God who can save Karnataka. If such is the case, they could not solve the problems of the people of Karnataka. It is time now they must resign and let the Governor's rule come into force. The time has come for all of them to step down," Shivakumar said.

Taking to Twitter, Sriramulu said that the KPCC president misinterpreted his statement.

He said that Opposition allegations of negligence and incapability of the government and irresponsibility of ministers are "far from the truth".

The minister said that people should be made aware of the prevention of coronavirus as it plays a very important role in the prevention of infection.

"Here are the cautioning words, 'If you stumble, only God has to save us.' The government, our Chief Minister BS Yediyurappa and ministers are working day and night. We are working for the people, to effectively face this century's challenge," he tweeted.

As many as 4,169 new COVID-19 cases and 104 deaths were reported in Karnataka on Thursday, taking the total number of cases to 51,422 cases including 19,729 recoveries and 1,032 deaths.

Bengaluru reported 2,344 new cases and 70 deaths in the last 24 hours, according to the state health department.