Chhattisgarh minister TS Singh Deo calls Scindia power-hungry leader for ditching Congress

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, Jun 23: In an unexpected development, the pump price of diesel is all set to surpass the petrol price in the capital, making it the most expensive transport fuel for the first time in a long time.

Globally, diesel is priced slightly above petrol prices due to the very nature of the product that has a higher cost of production. But in India, due to the lopsided taxation structure, diesel attracts lesser of the tax between the two auto fuels keeping its prices lower than petrol for last several years.

Diesel is currently priced at Rs 79.40 a litre in the Capital, just 36 paise short of petrol price that is being retailed at Rs 79.76 a litre. Going by the trend of price movement in the two products for the last few days where diesel prices have consistently increased by 50-60 paise per litre while the daily increase in petrol prices have fallen to just 20 paise on Tuesday, it is set to surpass petrol prices in next few days.

"Diesel price movement is sharper in international market and if oil companies follow the global price trend, diesel prices will surpass that of petrol later this week. It will be after many years that this would happen and is expected to sustain for some time unless government changes the tax structure of the petroleum products again," said an oil sector expert from one of the big four audit and advisory firms asking not to be named.

Interestingly, even in India the base price of diesel is expensive than petrol. According to the Indian Oil Corporation (IOC), while the base price of petrol in Delhi currently comes to Rs 22.11 per litre, the same for diesel is higher at Rs 22.93 per litre (effective from June 16, 2020). This has been the case for a long time, but retail price of petrol can be higher than diesel due to central and state taxes.

What has now brought diesel prices to a whisker of petrol prices in the capital is the Delhi government's decision early May to increase the Value Added Tax on diesel from 16.75 per cent to 30 per cent and on petrol from 27 per cent to 30 per cent. This increased the retail price of diesel and petrol in Delhi by Rs 7.10 and Rs 1.67 a litre respectively. With Central taxes on the two products already reaching identical levels, the Delhi governments move hastened price parity between petrol and diesel.

Currently, the Central excise on petrol is Rs 32.98 a litre while that on diesel it is Rs 31.83 a litre. The VAT on petrol in Delhi is Rs 17.71 a litre and that on diesel is Rs 17.60 a litre.

While the movement of retail pricing is being seen with a sigh of relief by vehicle owners whose cars run on petrol, those buying the relatively expensive diesel cars are now repenting on their decision. The development is also being seen with caution by automobile companies who have spent millions to ramp up their facilities for diesel run vehicles. The expectation is that demand for such cars will now fall, causing more damage to companies where sales are already impacted due to persistent economic slowdown and now the spread of COVID-19 pandemic.

"The pricing development would push automobile companies to strategies being followed by companies in the western markets where diesel run cars are not sold on fuel pricing differential, but on overall make and quality that puts them ahead of petrol run cars," the expert quoted earlier.

Yes, but for commercial vehicle sector the rising price of diesel had not been welcomed. In fact, the commercial transport sector had time an again threatened strike against the move to raise fuel prices.

With petrol and diesel retail prices closing, the case for adultering fuel has also gone down much to the relief of vehicle owners.

Dehradun, Jun 13: Chief of Army Staff General M M Naravane on Saturday said the country is passing through difficult times and its safety and honour depend on the ability of its young officers as military leaders.

Addressing gentlemen cadets at the Indian Military Academy here as the reviewing officer of a passing out parade, Gen Naravane said they are being commissioned as officers into the army under the most daunting of circumstances and the high standards of their military training will help them overcome the challenges lying in store for them.

The parade saw a total of 423 cadets being commissioned into the army including 333 from the country and 90 from friendly foreign countries.

"These are difficult times for the country. Its safety, honour and respect depend on your abilities as military leaders. You have to live up to the expectations of your countrymen. You have to ensure that whatever you do is for their welfare," he said.

The army chief said there are no good or bad regiments but only good officers.

"Become one with your men. Win their trust and affection and they will win battles for you," Naravane said.          

He asked the gentlemen cadets to throw themselves into their new role as commissioned officers with passion but also be compassionate towards their men.

"When the going gets tough and all seems lost, it is the spirit of your men that helps you win," he said.          

He said the gentlemen cadets who are taking their first step as commissioned officers will have to make decisions in the tactical and operational domain as well as resolve ethical issues and they will have only their conscience to guide them.          

"In such critical moments let the core values enshrined in the preamble of the constitution of India be your guiding light," the Army Chief said.

Asking them to rise above petty considerations of caste, creed and religion, he said the army does not discriminate.

Apart from containing the external threats, you may also have to defang internal forces out to destabilise the country.

He said the precise drill movements of the cadets had convinced him they will do their respective countries proud.

"In the autumn of your careers what will matter is not the position you finally attain but how honourably you have served your nation," he said.              

In a message to the gentlemen cadets' parents, who were not allowed to attend the event due to the coronavirus pandemic, the Army Chief said, "Till yesterday they (gentlemen cadets) were your children but from tomorrow they will be ours."

He promised to be with them through thick and thin.

The parade looked slightly off-colour this time with the enthusiastic crowds of parents and some usual features missing like the showering of the drill square with flower petals by helicopters.