Sexual harassment by passengers: Young techie jumps off train

New Delhi, Jan 24: Under attack for doling out subsidies, Delhi Chief Minister Arvind Kejriwal on Friday said freebies in limited dose are good for the economy as they make more money available to the poor and boosts demand.

Opposition parties have been attacking the AAP-led Delhi government for giving "freebies" ahead of polls after it announced schemes like free bus rides for women and 200 units of free electricity.

"Freebies, in limited dose, are good for economy. It makes more money available to poor, hence boosts demand. However, it should be done in such limits so that no extra taxes have to be imposed and it does not lead to budget deficits," Kejriwal said in a tweet.

Slamming the BJP, Kejriwal said he is happy that the people of Delhi have forced the Saffron party to ask for votes on the basis of CCTVs, schools and unauthorised colonies.

Reacting to a tweet of the BJP Delhi in which Home Minister Amit Shah had asked how many schools have been constructed and cameras installed by the AAP government, Kejriwal said he is happy that Shah saw some CCTV cameras as earlier he had claimed that he could not find a single one.

"I am happy you saw some CCTV cameras. A few days back you said there was not a single camera. Take out some time we will show you our schools also. I am extremely happy that the people of Delhi have changed the politics by which the BJP has to ask for votes on CCTV, schools and raw colonies here," he said in a tweet.

Responding to Shah's allegation that he could not find WiFi in Delhi as promised by Kejriwal and that his battery drained out in the process, the Delhi chief minister said along with free WiFi they have also made arrangement for free charging points.

A man posed as Superintendent of Police (SP), called up a subordinate police official and asked him to get his mobile phone repaired or face the consequences. But, his bluff was later called and the man landed in lockup.

Azamgarh SP Triveni Singh said the 23-year-old youth, Shubham Upadhyay, is the son of a farmer. He was preparing for competitive exams when his phone developed a snag on Saturday. He tried to reach out to local mechanics, but they were unavailable to fix it due to the lockdown.

Upadhyay used a free caller identification app to call up the in-charge of the Kotwali police station, K. K. Gupta, and threatened to shunt him out, if he failed to swiftly get the work done. Gupta grew suspicious and eventually caught the youth.

n his statement to the police, Shubham Upadhyay said, "On Sunday noon, I tried to breach the district borders to reach Lucknow to repair my phone, but since there was heavy police presence and barricading, I returned home. Later, I installed a free caller identification app in my handset and mentioned the name as SP Azamgarh and even uploaded a photo of the cop to appear genuine."

He first called SHO, Kotwali to get the phone repaired and was told the handset would be picked up from the SP office in an hour. Then, he called a businessman to bring his SUV and hand over his mobile to the SHO.

But when Upadhyay called the police again to suggest a separate meeting point, he raised suspicion. When the SHO tried to confirm the venue, Upadhyay got hesitant and said he would send a peon.

"I suddenly realised something was fishy and rang up the public relation officer of SP Azamgarh, who denied any such order from the SP. When the caller's number was scanned, it displayed the name of SP Azamgarh," said SHO Gupta.

A trap was laid and when the SHO reached the venue, he found one Praveen Shukla sitting in the vehicle. Police got the address of the accused from Shukla and reached Upadhyay's home in Bilariya locality and arrested him.

Upadhyay has been booked under IT Act and for threatening a public servant.

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.