Naqvi defends PM Modi after archbishop calls for prayer campaign ahead of 2019 polls

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 24: They hail from vastly different backgrounds — Donald Trump is the son of a property tycoon while Narendra Modi is a descendant of a poor tea-seller.

Yet the two teetotallers, loved by right-wing nationalists in their home countries, share striking similarities that have seen them forge a close personal bond, analysts say.

Ahead of the American leader's first official visit to India, which begins in Modi's home state of Gujarat on Monday, the world's biggest democracy has gone out of its way to showcase the chemistry between them.

In Gujarat's capital Ahmedabad, large billboards with the words "two dynamic personalities, one momentous occasion" and "two strong nations, one great friendship" have gone up across the city.

"There's a lot that Trump and Modi share in common, and not surprisingly these convergences have translated into a warm chemistry between the two," Michael Kugelman of the Washington-based Wilson Center said.

"Personality politics are a major part of international diplomacy today. The idea of closed-door dialogue between top leaders has often taken a backseat to very public and spectacle-laden summitry."

Since assuming the top political office in their respective countries — Modi in 2014 and Trump in 2017 — the two men have been regularly compared to each other.

Trump, 73, and Modi, 69, both command crowds of adoring flag-waving supporters at rallies. A virtual cult of personality has emerged around them, with their faces and names at the centre of their political parties' campaigns.

A focus of Trump's administration has been his crackdown on migrants, including a travel ban that affects several Muslim-majority nations, among others, while critics charge that Modi has sought to differentiate Muslims from other immigrants through a contentious citizenship law that has sparked protests.

Both promote their countries' nationalist and trade protectionist movements — Trump with his "America First" clarion call and Modi with his "Make in India" mantra.

And while they head the world's largest democracies, critics have described the pair as part of a global club of strongmen that includes Russia's Vladimir Putin and Brazil's Jair Bolsonaro.

"There are many qualities that Trump and Modi share — a love for political grandstanding and an unshakable conviction that they can achieve the best solutions or deals," former Indian diplomat Rakesh Sood said.

Modi and Trump have sought to use their friendship to forge closer bonds between the two nations, even as they grapple with ongoing tensions over trade and defence.

Despite sharing many similarities in style and substance, analysts say there are some notable differences between the pair.

Modi is an insider who rose through the ranks of the Bharatiya Janata Party after starting out as a cadre in Rashtriya Swayamsevak Sangh.

Trump is a businessman and a political outsider who has in some sense taken over the Republican Party.

"Modi is a more conventional leader than is Trump in that he hasn't sought to revolutionise the office he holds in the way that Trump has," said Kugelman, a longtime observer of South Asian politics.

He added that genuine personal connections between leaders of both countries have helped to grow the partnership.

"George Bush and Manmohan Singh, Barack Obama and Singh, Obama and Modi, now Modi and Trump — there has been a strong chemistry in all these pairings that has clearly helped the relationship move forward," he added.

Trump has also stood by the Indian leader during controversial decisions, including his revocation of autonomy for Kashmir and his order for jets to enter Pakistani territory following a suicide bombing.

Analysts said the leaders would use the visit to bolster their image with voters.

A mega "Namaste Trump" rally in Ahmedabad on Monday will be modelled after the "Howdy, Modi" Houston extravaganza last year when the Indian leader visited the US and the two leaders appeared before tens of thousands of Indian-Americans at a football stadium.

"The success of this visit... will have a positive impact on his (Trump's) re-election campaign and the people of Indian origin who are voters in the US — a majority of them are from Gujarat," former Indian diplomat Surendra Kumar said.

"On the Indian side, the fact that Prime Minister Modi... (shares) such warmth, bonhomie and informality with the most powerful man on Earth adds to his stature... as well as with hardcore supporters."

New Delhi, Jul 14: India's COVID-19 tally has reached 9,36,181 as 29,429 new coronavirus cases were reported in the last 24 hours, informed the Union Ministry of Health and Family Welfare on Wednesday.

The death toll went up to 24,309, including 582 fatalities in the last 24 hours.

Out of the total cases, 3,19,840 are currently active and 5,92,032 are cured/discharged/migrated.

As per the Ministry, Maharashtra -- the worst-affected state from the infection -- has a total of 2,67,665 COVID-19 cases and 10,695 fatalities. While Tamil Nadu has a tally of 1,47,324 cases and 2,099 deaths due to COVID-19.

Delhi has reported a total of 1,15,346 cases and 3,446 deaths due to COVID-19.

As per the information provided by the Indian Council of Medical Research (ICMR) 3,20,161 samples have been tested for COVID-19 till July 14, of these 1,24,12,664 samples were tested on Tuesday.