Why expect jobs from govt? Start paan shop or breed cows: BJP CM tells people

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 26: Calling the recent violence in Delhi as 'planned conspiracy', Sonia Gandhi on Wednesday demanded Union Home Minister Amit Shah's resignation over the clashes that left 20 people dead in two days.

"CWC (Congress Working Committee) believes Home Minister and Centre is responsible. The Home Minister should tender his resignation with immediate effect," the Congress party's interim chief told reporters here.

Violent clashes erupted between pro and anti-CAA groups in parts of northeast Delhi on Monday, leading to widespread vandalism and arson for over two days.

While many blamed police for inaction to control the mobs, Union Home Minister Amit Shah met the top brass of Delhi Police, Chief Minister Arvind Kejriwal, LG Anil Baijal and directed the officials to control the situation.

Gandhi blamed both the Central and the Delhi governments, saying the administration did not take adequate steps on time to curb violence in the national capital.

"Chief Minister Arvind Kejriwal and Center is equally responsible for not activating the administration to reach out to the people to maintain peace and harmony," Sonia added.

The death toll in the violence rose to 20 on Wednesday, according to GTB hospital authorities.

Government sources told ANI that the National Security Advisor (NSA) Ajit Doval has been given the charge of bringing normalcy in the capital.

Sources also said that Doval will brief Prime Minister Narendra Modi and the Cabinet about the prevailing situation.

The NSA last night visited Jaffrabad, Seelampur and other parts of northeast Delhi where he held talks with leaders of different communities.

Without naming any leader, the Congress interim president also targeted the leaders of the Bharatiya Janata Party for making inflammatory statements saying that "there is a conspiracy behind the violence, country also saw this during Delhi elections. Many BJP leaders made inciting comments creating an atmosphere of fear and hatred."

New Delhi, June 22: Former Prime Minister Manmohan Singh on Monday asked Prime Minister Narendra Modi to be “mindful of the implication of his words” as a controversy raged over his “no intrusion” remark about the violent face-off with Chinese troops in the Galwan Valley.

“The Prime Minister must always be mindful of the implications of his words and declarations on our Nation’s security as also strategic and territorial interests,” Singh said in a statement here as Chinese media welcomed Modi’s ‘no intrusion’  remarks contending that it may lead to a de-escalation of tensions between China and India.

Congress has been maintaining that Modi’s assertions at Friday’s all-party meeting that neither was there any intrusion nor was any Indian post captured ran counter to the statements made by the Indian Army and the External Affairs Ministry.

Singh said the prime minister cannot allow his words to be used by China as a vindication of its position and all organs of the government should work together to tackle this crisis and prevent it from escalating further.

“We remind the Government that disinformation is no substitute for diplomacy or decisive leadership. The truth cannot be suppressed by having pliant allies spout comforting but false statements,” the former prime minister said.

Singh said the prime minister and the government should rise to the occasion to ensure justice for Colonel B Santosh and the army jawans who made the supreme sacrifice and resolutely defended the nation’s territorial integrity.

“To do any less would be a historic betrayal of the people’s faith,” the former prime minister said.

“At this moment, we stand at historic crossroads. Our Government’s decisions and actions will have serious bearings on how the future generations perceive us,” Singh said.

Singh said China was brazenly and illegally seeking to claim parts of Indian territory such as the Galwan Valley and the Pangong Tso Lake by committing multiple incursions between April 2020 till date.  

“We cannot and will not be cowed down by threats and intimidation nor permit a compromise with our territorial integrity,” said Singh. 

The former prime minister said this was a moment where “we must stand together as a nation and be united in our response to this brazen threat.”