Six feet distancing not enough to stop coronavirus transmission in light winds: Study

News Network
May 20, 2020

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.

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News Network
April 12,2020

Apr 12: India and other South Asian countries are likely to record their worst growth performance in four decades this year due to the coronavirus outbreak, the World Bank said on Sunday.

The South Asian region, comprising eight countries, is likely to show economic growth of 1.8 per cent to 2.8 per cent this year, the World Bank said in its South Asia Economic Focus report, well down from the 6.3 per cent it projected six months ago.

India's economy, the region's biggest, is expected to grow 1.5 per cent to 2.8 per cent in the fiscal year that started on April 1. The World Bank has estimated it will grow 4.8 per cent to 5 per cent in the fiscal year that ended on March 31.

"The green shoots of a rebound that were observable at the end of 2019 have been overtaken by the negative impacts of the global crisis," the World Bank report said.

Other than India, the World Bank forecast that Sri Lanka, Nepal, Bhutan and Bangladesh will also see sharp falls in economic growth.

Three other countries - Pakistan, Afghanistan and the Maldives - are expected to fall into recession, the World Bank said in the report, which was based on country-level data available as of April 7.

Measures taken to counter the coronavirus have disrupted supply chains across South Asia, which has recorded more than 13,000 cases so far - still lower than many parts of the world.

India's lockdown of 1.3 billion people has also left millions out of work, disrupted big and small businesses and forced an exodus of migrant workers from the cities to their homes in villages.

In the event of prolonged and broad national lockdowns, the report warned of a worst-case scenario in which the entire region would experience an economic contraction this year.

To minimize short-term economic pain, the Bank called for countries in the region to announce more fiscal and monetary steps to support unemployed migrant workers, as well as debt relief for businesses and individuals.

India has so far unveiled a $23 billion economic plan to offer direct cash transfers to millions of poor people hit by its lockdown. In neighbouring Pakistan, the government has announced a $6 billion plan to support the economy.

"The priority for all South Asian governments is to contain the virus spread and protect their people, especially the poorest who face considerable worse health and economic outcomes," said senior World Bank official Hartwig Schafer.

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News Network
June 3,2020

New Delhi, Jun 3: Over 1 lakh scanned copies of Indians' national IDs, including Aadhaar, PAN card and passport, have been put on dark web for sale, cyber intelligence firm Cyble said on Wednesday.

The leaked data seems to have originated from a third party and not from the government system, according to a report by Cyble.

"We came across a non-reputed actor who is currently selling over 1 lakh Indian National IDs on the dark net. With such a low reputation, ideally, we would have skipped this; however, the samples shared by the actor intrigued our interest -- and also the volume. The actor is alleged to have access to over 1 lakh IDs from different places in India," Cyble said.

The personal data leaked by cyber criminals leads to various nefarious activities such as identity thefts, scams, and corporate espionage. Many criminals use the personal details in the IDs to win trust of the people over a phone call for fraudulent activities.

Cyber criminals leak personal data of 2.9 cr job-seeking Indians on dark web for free

The Cyble researchers acquired around 1,000 IDs from the seller and confirmed that the scanned IDs belong to Indians.

"Preliminary analysis suggests that the data originated from a third party, and no indication or artefact is indicating that it came from a government system. At this point, Cyble researchers are still investigating this further -- we are hoping to share an update soon," Cyble said.

The scanned ID documents indicate that the data may have been leaked from a company's data base in the segment where they have to comply with 'Know Your Customer' (KYC) norms.

"Cyble researchers have also learned about a surge in KYC and banking scams -- leaks such as this are often used by scammers to target individuals, especially elderlies," Cyble said.

The cyber intelligence firm has recommended people to refrain from sharing personal information especially financial information over phone, e-mail or SMS.

"Regularly monitor your financial transaction, if you notice any suspicious transaction, contact your bank immediately," the company said.

In May, Cyble showed two instances where personal data of 7.65 crore Indians have been put on sale in the dark web. In one instance, the seller claimed to have sourced data of 4.75 crore Indians from online directory Truecaller and in other, the seller claimed to have sourced from job websites.

Truecaller, however, had denied the claim of breach in its database.

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News Network
February 18,2020

New Delhi, Feb 18: Election strategist-turned-politician Prashant Kishor on Tuesday questioned the Nitish Kumar government's development model, even as he sneered at the chief minister for making ideological compromises to stay in an alliance with the BJP.

Kishor, who has been vocal about his opposition to the Citizenship (Amendment) Act (CAA), said Kumar needs to spell out whether he is with the ideals of Mahatma Gandhi or those who support Nathu Ram Godse.

"Nitish ji has always said that he cannot leave the ideals of Gandhi, JP and Lohiya... At the same time, how can he be with the people who support the ideology of Godse? Both cannot go together. If you want to stay with the BJP, I don't have any problem with it but you cannot be on both sides," he said.

"There has been a lot of discussion between me and Nitish-ji on this. He has his thought process and I have mine. There have been differences between him and me that the ideologies of Godse and Gandhi cannot stand together. As the leader of the party you have to say which side you are on," he added.

In a direct assault on Kumar's model of governance, Kishor said Bihar was the poorest state in 2005 and continues to be so.

"There has been development in Bihar during the last 15 years, but the pace has not been as it should have," he added.

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