IIT-Kanpur Dalit student commits suicide

New Delhi, Mar 21: Novel coronavirus cases in India rose to 258 on Saturday after 35 fresh cases were reported in various parts of the country, according to the Health Ministry.

Among the 258 are 39 foreign nationals, including 17 from Italy, three from the Philippines, two from the UK, one each belonging to Canada, Indonesia and Singapore.

The total figure also includes four deaths reported from Delhi, Karnataka, Punjab and Maharashtra.

"The total number of active COVID-19 cases across India stands at 231 so far," the ministry said, adding that 23 others have been cured/discharged/migrated while four have died.

Delhi has, so far, reported 26 positive cases, which include one foreigner, while Uttar Pradesh has recorded 24 cases, including one foreigner.

Maharashtra has 52 cases, including three foreigners, while Kerala has recorded 40 cases, which include seven foreign nationals.

Karnataka has 15 coronavirus patients. The number of cases in Ladakh rose to 13 and Jammu & Kashmir four. Telangana has reported 19 cases, which include 11 foreigners.

Rajasthan has also reported 17 cases, including two foreigners. Gujarat has reported seven cases so far.

Tamil Nadu, Andhra Pradesh and Uttarakhand have reported three cases each.

West Bengal, Odisha and Punjab each reported two cases while Puducherry, Chhattisgarh and Chandigarh reported one case each.

In Haryana, there are 17 cases, which include 14 foreigners.

New Delhi, Jul 26: Union Home Minister Amit Shah on Sunday saluted the valour and grit of the Indian soldiers on the occasion of 21st anniversary of the 'Kargil Vijay Diwas'.

Shah took to Twitter and said that 'Kargil Vijay Diwas' is a symbol of India's proud, valour and steadfast leadership.

"Kargil Vijay Diwas is a symbol of India's proud, valor and steadfast leadership. I bow to the soldiers who, with their indomitable courage, drove the enemy from the inaccessible hills of Kargil and waved the tricolor there again. The country is proud of the heroes of India, who are dedicated to protecting the motherland," Shah tweeted (translated from Hindi)
The country is celebrating the anniversary of the 'Kargil Vijay Diwas'.

The Indian armed forces had defeated Pakistan on July 26, 1999. Since then, the day is celebrated as 'Kargil Vijay Diwas' to rekindle the pride and valour of the soldiers who took part in Operation Vijay.

The day marks the victory of Indian soldiers in recapturing the mountain heights that were occupied by the Pakistani Army on July 26, 1999, known as the Kargil War. 

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.