Storms lash across Italy leaving Venice afloat

Agencies
October 30, 2018

Venice, Oct 30: At least three people died on Monday in Italy as fierce winds and rains lashed much of the country and caused waters in the canal-ringed city of Venice to reach historic high levels.

Two people were killed when a tree fell on their car not far from Rome, and a young man in the Naples region also died after being hit by a falling tree, according to authorities.

In Venice, rain-soaked tourists were barred from an inundated St. Mark's Square where local authorities said the "acqua alta" (high water) peaked at 156 centimetres (61 inches) by early afternoon, the elevated wooden platforms, usually placed on main passageways in the Renaissance city were not enough to ensure safe passage in the low-lying square.

Families carried children on their shoulders through the surrounding streets. While some tourists donned thigh-high wellies, others had opted to take off their shoes and wade through the water.

The waters have only topped 150 centimetres five times before in recorded history. In 1966, when floods swept through the country, famously devastating Florence's historic centre, the waters reached 194 centimetres in Venice.

Nearly all of northern Italy was on alert due to the violent storms with wind gusts up to 100 kilometres per hour and the rainfall in some places equivalent to the amount of rain that falls over several months. Luca Zaia, head of the Veneto region, said he was worried that the situation could be worse than the huge floods in 2010.
"The ground is already saturated with water, the rivers are full and due to sirocco (a strong hot wind from Northern Africa), the sea is not absorbing (the waters), he said.

In the north all the schools in Veneto were closed as well as in Genoa and Rome.

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News Network
May 20,2020

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.

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News Network
July 5,2020

Washington, Jul 5: US President Donald Trump on Saturday thanked Prime Minister Narendra Modi for his wishes on America's 244th Independence Day.

On Saturday, PM Modi tweeted: "I congratulate @POTUS @realDonaldTrump and the people of the USA on the 244th Independence Day of the USA. As the world's largest democracies, we cherish freedom and human enterprise that this day celebrates. @WhiteHouse"

While replying to PM Modi's wishes, Mr Trump tweeted: "Thank you my friend. America loves India!"

The US President also attended the July 4 American Independence Day celebrations in South Dakota.

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Agencies
August 7,2020

Moscow, Aug 7: Russia will register its first vaccine against the coronavirus on August 12, Deputy Health Minister Oleg Gridnev said on Friday.

The vaccine has been developed jointly by the Gamaleya Research Institute and the Russian Defence Ministry.

"The vaccine developed by the Gamaleya centre will be registered on August 12. At the moment, the last, third, stage is underway. The trials are extremely important. We have to understand that the vaccine must be safe. Medical professionals and senior citizens will be the first to get vaccinated," Gridnev told reporters at the opening of a cancer centre building in the city of Ufa.

According to the minister, the effectiveness of the vaccine will be judged when the population immunity has formed.

Clinical trials of the vaccine began on June 18 and included 38 volunteers. All of the participants developed immunity. 

The first group was discharged on July 15 and the second group on July 20.

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