Gangster Munna Bajrangi shot dead inside UP jail

Feb 26: In his first reaction to incidents of violence in Delhi which have left at least 20 people dead, Prime Minister Narendra Modi on Wednesday appealed for peace and brotherhood, and said he has held an extensive review of the prevailing situation in various parts of the national capital.

He also said it was important that calm and normalcy was restored at the earliest.

“Had an extensive review on the situation prevailing in various parts of Delhi. Police and other agencies are working on the ground to ensure peace and normalcy,” Modi tweeted.

Stressing that peace and harmony are “central to our ethos”, Modi said, “I appeal to my sisters and brothers of Delhi to maintain peace and brotherhood at all times.”

At least 20 people have been killed since Sunday in communal violence in Northeast Delhi, triggered after clashes between pro and anti-CAA protestors over the Citizenship (Amendment) Act.

Jan 7: Body of the senior Iranian military commander, Qasem Soleimani killed in a U.S. drone strike in Iraq last week, has arrived in his home town of Kerman in southeast Iran for burial, the official IRNA news agency said on Tuesday.

State TV broadcast live images of thousands of people in the streets of the town, many of them dressed in black, to mourn Soleimani's death.

Soleimani was widely seen as Iran’s second most powerful figure behind Supreme Leader Ayatollah Ali Khamenei, 80, who wept in grief along with hundreds of thousands of mourners who thronged the streets of Tehran for Soleimani’s funeral on Monday.

Khamenei led prayers at the funeral in the Iranian capital, pausing as his voice cracked with emotion. Soleimani, 62, was a national hero even to many who do not consider themselves supporters of Iran’s clerical rulers.

He was killed while leaving Baghdad airport last Friday. Mourners packed the streets, chanting: “Death to America!” - a show of national unity after anti-government protests in November in which many demonstrators were killed.

The crowd, which state media said numbered in the millions, recalled the masses gathered in 1989 for the funeral of the Islamic Republic’s founder, Ayatollah Ruhollah Khomeini.

The killing of Soleimani has prompted fears around the world of a broader regional conflict, as well as calls in the U.S. Congress for legislation to keep President Donald Trump from going to war against Iran.

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.