Senior BHU official quits; Congress demands apology from PM Narendra Modi

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.

Jan 28: After Union minister Anurag Thakur, on Tuesday, BJP MP Parvesh Verma has stoked a controversy by saying that "Shaheen Bagh protesters will enter houses and rape sisters, daughters." The BJP MP even went on to say that if BJP is voted to power in Delhi, they "will clear Shaheen Bagh protest within an hour."

"If the BJP comes to power in Delhi on February 11, we will clear Shaheen Bagh of all protests and protesters within one hour. Not a single person will be visible," Parvesh Verma said during a meeting at Vikaspuri assembly constituency.

"Lakhs of people gather there [Shaheen Bagh]. People of Delhi will have to think and take a decision. They will enter your houses, rape your sisters and daughters, kill them. There's time today, Modi ji & Amit Shah won't come to save you tomorrow..." the BJP MP told news agency ANI.

"If our government is formed, then give me just a month after February 11, and I will remove all mosques built on government land in my Lok Sabha constituency," the BJP parliamentarian added.

Well, these statements didn't go down well with the netizens, who took to Twitter to express what they felt about the BJP leader's comments. A user wrote, "This is pure, unadulterated hate speech." While other user said, "Only when you thought BJP couldn't stoop any lower."

Earlier, on Monday, BJP leader and Union Minister Anurag Thakur triggered a row after he led the crowd to raise an incendiary slogan that "traitors should be shot". At the rally, Thakur, the Minister of State (MoS) for Finance, shouted: "desh ke gaddaron ko" to which the crowd responded, "goli maro saalo ko" (shoot down the traitors).

Addressing the meeting in support of BJP candidate from Rithala, Manish Chaudhary, Thakur raised the pitch of nationalism as he linked opposition parties with anti-CAA protests in Shaheen Bagh and with alleged anti-India slogans, and then asked the crowd to raise the controversial slogan.

For more than a month, over 200 women have been joined by hundreds of others every day at South East Delhi's Shaheen Bagh at a sit-in protest against the CAA which promises citizenship to only non-Muslim refugees from three neighbouring countries.

Protests have been ongoing in different parts of the country against the amended Citizenship Act (CAA) which grants citizenship to Hindus, Sikhs, Jains, Parsis, Buddhists and Christians fleeing religious persecution from Pakistan, Afghanistan, and Bangladesh if they entered India on or before December 31, 2014.

United Nations, Jul 10: India is a "good example" as solar auctions have seen popularity amidst the height of the COVID-19 pandemic, UN chief Antonio Guterres said on Thursday, underlining that renewable energy is the only energy source expected to grow in 2020 and offers more jobs than the fossil fuel industry.

In his remarks to the International Energy Agency "Clean Energy Transition Summit'', UN Secretary-General Guterres urged the international community to commit to further usage of coal and to end all external financing of coal in the developing world.

"Coal has no place in COVID-19 recovery plans. Nations must commit to net-zero emissions by 2050 and submit more ambitious national climate plans before COP-26 next year," he said.

"The seeds of change are there. Renewable energy is the only energy source expected to grow in 2020. Solar auctions have seen popularity amidst the height of the pandemic. India serves as a good example. Renewables offer three times more jobs than the fossil fuel industry," Mr Guterres said.

Last month, Adani Green Energy said it has bagged the first of its kind manufacturing-linked solar contract worth Rs 45,000 crore from the Solar Energy Corporation of India (SECI) to develop 8 GW electricity generation capacity and 2 GW equipment manufacturing facility in the country.

Mr Guterres said he has asked all countries to consider six climate positive actions as they rescue, rebuild and reset their economies.

"We need to make our societies more resilient. We need green jobs and sustainable growth," he said, adding that bailout support to sectors such as industry, aviation and shipping should be conditioned on alignment with the goals of the Paris Agreement.

Countries also need to stop wasting money on fossil fuel subsidies and place a price on carbon, he said, noting that countries need to consider climate risk in their decision making.

"Every financial decision must take account of environmental and social impacts. Overall, we need to work together," he said.