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The current physical distancing guidelines provided by the World Health Organisation (WHO) and by the US Centers for Disease Control and Prevention (CDC) may not be adequate to curb the coronavirus spread, according to a research which says the gas cloud from a cough or sneeze may help virus particles travel up to 8 metres. The research, published in the Journal of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.

Study author, MIT associate professor Lydia Bourouiba, warned that droplets of all sizes can travel 23 to 27 feet, or 7-8 metres, carrying the pathogen.

According to Bourouiba, the current guidelines are based on "arbitrary" assumptions of droplet size, "overly simplified", and "may limit the effectiveness of the proposed interventions" against the deadly pandemic.

 She explained that the old guidelines assume droplets to be one of two categories, small or large, taking short-range semi-ballistic trajectories when a person exhales, coughs, or sneezes.

However based on more recent discoveries, the MIT scientist said, sneezes and coughs are made of a puff cloud that carries ambient air, transporting within it clusters of droplets of a wide range of sizes.

Bourouiba warned that this puff cloud, with ambient air entrapped in it, can offer the droplets moisture and warmth that can prevent it from evaporation in the outer environment.

"The locally moist and warm atmosphere within the turbulent gas cloud allows the contained droplets to evade evaporation for much longer than occurs with isolated droplets," she said.

"Under these conditions, the lifetime of a droplet could be considerably extended by a factor of up to 1000, from a fraction of a second to minutes," the researcher explained in the study.

The MIT scientist, who has researched the dynamics of coughs and sneezes for years, added that these droplets settle along the trajectory of a cough or sneeze contaminating surfaces, with their residues staying suspended in the air for hours.

"Even when maximum containment policies were enforced, the rapid international spread of COVID-19 suggests that using arbitrary droplet size cutoffs may not accurately reflect what actually occurs with respiratory emissions, possibly contributing to the ineffectiveness of some procedures used to limit the spread of respiratory disease," Bourouiba wrote in the study

Udupi, Jun 20: Movement of heavy vehicles on Agumbe Ghat section was banned till October 15, following heavy rain lashing due to onset of South West Monsoon.

The Agumbe Ghat connects Shivamogga with the Udupi district. There is a possibility of landslides on either side of the Ghat road if movement of heavy vehicles is allowed during the monsoon, said Udupi DC G Jagadeesh in statement issued here on Saturday.

The movement of all heavy vehicles above 12 tonnes has been banned on the road. Till end of monsoon all the heavy vehicles have to move via Udupi-Brahmavar-Barkur-Shankaranarayana; Siddapura-Hosangady-Hulikal Ghat-Hosanagara-Theerthahalli; Udupi-Karkala-Bajagoli-S K Border-Kerekatte-Sringeri- Shivamogga.

Even more than three years after demonetisation and all-out efforts to make most transactions through electronic, cash is still king, as it thrives in a digital India, said fintech start-up Paytm founder Vijay Sekhar Sharma.

"While cashless economy is not possible in India, less cash economy will be in the future. Less cash is the only solution, not the elimination of cash," Sharma told IANS in an interview after unveiling an all-in-one payment gateway on Tuesday.

Asserting that it would take 5-10 years for India to make the transition to digital payments from the traditional mode of cash, Sharma, 41, said the e-payment industry benefitted more from the November 8, 2016 note ban and withdrawal of old Rs 1,000 and Rs 500 denominations.

"I think it (demonetisation) helped the industry despite lack of specific help. But the world has changed since then. It is about the scale of distribution of merchants that is what is propelling digital payments," said Sharma.

Most of the cash not only came back into circulation, but also remains as the mode of payment for the majority due to its convenience for the people used to such transactions.

Expounding Paytm's zero service charge, Sharma said the strategy is sustainable as it leads to acquiring more customers and merchants, enabling newer business opportunities.

Paytm also does not levy a service charge to small merchants for its payments services, unlike organised players like Uber.

"Though there is a monetisation model, the merchants who are small shopkeepers, become our financial services customers as they open a bank account, which is profitable."

Paytm secured a Payments Bank license from the Reserve Bank of India to offer a savings bank account, Rupay debit card and money transfer services.

"We are banking on payment services acquiring customers and merchants who avail banking, lending, insurance, wealth and software services like billing software and business ledger software services eventually," Sharma noted.

The mobile first bank services include zero balance and zero digital transaction charge accounts.

"Basically, payments, cloud, commerce and financial services are a cohort we follow. So, payments is our customer as well as merchant acquisition. If it breaks even, we are happy because other line items make more money, he affirmed.

Noting that in a market like India, one cannot price services at a premium unlike in a developed country like the US, the billionaire businessman said a consumer in a developing country would not be able to afford such a hefty charge.

Forbes ranked Sharma as India's youngest billionaire in 2017, with a net worth of $2.1 billion.

While several countries operate on the model of higher service charges, Sharma said newer business models have to be discovered in India, as customer lifecycle value is accounted for more stages than in other nations.

Asked about an upscale retailer like Zara not giving a wallet payment option during its recent end of season sale in Bengaluru, Sharma said Paytm was addressing such hiccups with its all-in-one payment solutions.

"It's an opportunity, because if the retailer has our all-in-one point of sale machine, where in they enter the amount, it shows both the Quick Response code (QR) and card payment options," he observed.

Sharma compared older swiping payment machine to feature phones and modern ones to feature-rich smartphones.

"If you notice, they look like feature phones and the modern day card machine is more a smartphone like. You can add the smatphone components, which can add the features," reiterated Sharma.

Though Paytm's all-in-one QR point of sale machine integrates the billing system, its chief executive said it was not ideal to have an independent QR feature.

Paytm has 16 million strong merchant user base, which Sharma aims to raise to 26 million base in the next one year.

Sharma has launched in this tech city an all-in-one payment gateway and Paytm Business Payments solution, which enable digital payments through multiple methods for small and medium enterprises (SMEs) and an Android point of sale machine.

With the new gateway solution, collecting digital payments through multiple methods can be achieved seamlessly while Paytm Business Payments solution enables automated vendor payments, including employee salaries and customer refunds among others.

The One97 Communications-owned Paytm aims to help SMEs streamline and digitise their business activities using its new solutions, which enhance the overall efficiency of both accepting and making payments.

Paytm has a data bank of over 200 million saved cards and bank accounts, a feature which enables partner apps to shorten transaction times and propel faster conversions while using the all-in-one payment gateway.

Complementing the two solutions, Sharma also launched an all-in-one Android point of sale machine, which can accept payments through all forms such as cards, wallets, UPI apps and even cash.

The device has a QR code that supports all contact and contactless payments, coming with integrated billing software customized solutions for different sectors such as catering, ticketing, parking and others.

The handheld Android device is equipped with an in-built printer, scanner and can also generate bills.

Valued at $16 billion, Paytm is not alone in the fiercely competitive Indian fintech space where a dozen players like PhonePe, MobiKwik, Kotak 811 and deep pocketed international giants Google Pay and Amazon Pay are in the fray.