Ramdev suggests no vote rights to 3rd & higher children

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, Jan 21: With the IMF lowering India's economic growth estimate for the current fiscal to 4.8 per cent, senior Congress leader P Chidambaram on Tuesday claimed an attack on the world body and its chief economist Gita Gopinath by government ministers was imminent.

He also alleged that the growth figure of 4.8 per cent given by the International Monetary Fund (IMF) is after some "window dressing" and he won't be surprised if it goes even lower.

"Reality check from IMF. Growth in 2019-20 will be BELOW 5 per cent at 4.8 per cent," Chidambaram said in a series of tweets.

"Even the 4.8 per cent is after some window dressing. I will not be surprised if it goes even lower," the former finance minister said.

IMF Chief Economist Gopinath was one of the first to denounce demonetisation, he noted.

"I suppose we must prepare ourselves for an attack by government ministers on the IMF and Dr Gita Gopinath," Chidambaram said.

The IMF lowered India's economic growth estimate for the current fiscal to 4.8 per cent and listed the country's much lower-than-expected GDP numbers as the single biggest drag on its global growth forecast for two years.

In October, the IMF had pegged India economic growth at 6.1 per cent for 2019.

Listing decline in rural demand growth and an overall credit sluggishness for lowering of India forecasts, Gopinath, however, had said the growth momentum should improve next year due to factors like positive impact of corporate tax rate reduction.

Washington, Feb 16: India and the United States share "unshakeable" ties, said US Principal Deputy Assistant Secretary (PDAS), Alice Wells, on Sunday, adding that the upcoming visit of President Donald Trump will further strengthen the relationship between the two countries.

"The U.S. and #India enjoy a close partnership that grows stronger day by day. Together, we are breaking records. For example, we welcomed a record number of Indian exchange students to the US last year and hope to receive even more this year," said Bureau of South and Central Asian Affairs in a tweet attributed to Alice Wells.

"The ties between our countries are unshakeable, and we look forward to an even warmer relationship as @narendramodi hosts @POTUS later this month," it added.

Trump will pay a two-day state visit to India from February 24 at the invitation of Prime Minister Narendra Modi.

"India is at the heart of the Indo-Pacific region and plays an increasingly prominent role on the world's stage. The U.S. looks forward to partnering with #India at every step of the way, " Alice Wells further said.

According to the Ministry of External Affairs (MEA), Trump is expected to attend an event at the Motera Stadium in Ahmedabad on the lines of the ''Howdy Modi'' function that was addressed by the US President and PM Modi in Houston in September last year. Trump is slated to pay a two-day visit to India from February 24.

During the visit, Trump, who will be accompanied by First Lady Melania, will attend official engagements in New Delhi and Ahmedabad, and interact with a wide cross-section of the Indian society, the MEA said in a statement.

The announcement of Trump's first official visit to India was earlier made by the White House on Monday, which, in its statement, said that the US President and Modi had agreed during a recent phone conversation that the trip will "further strengthen the United States-India strategic partnership and highlight the strong and enduring bonds between the American and Indian people".