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Mangaluru, May 4: In order to protect the frontline coronavirus fighters from the pathogen, students at Sahyadri College of Engineering & Management has developed face shields that will help the front-line healthcare workers.

Mr Johnson Tellis - Chief Innovation Officer, Mr Gautham Nayak - Design Engineer and DreamWorks Makerspacerun by determined students, supported by Sahyadri Start-up ecosystem, at Sahyadri College of Engineering & Management has headed the team.

The team took the initiative along with other maker communities in Mumbai, Bangalore, Delhi and the likes, with a pledge to produce and deliver 1 Million face shields across India. In three weeks, the team has contributed to the cause and delivered more than3500 face shields and a ventilator splitter for the Dakshina Kannada and Shimoga region.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Bengaluru, May 19: In the wake of assurance by Chief Minister B S Yediyurappa to look into their demands, hotels and restaurants in Karnataka today decided to continue takeaway services for three more days.

Hotels were also exempted from the total lockdown on Sundays in Karnataka - under the state guidelines issued for Lockdown 4.0.

The Karnataka Pradesh Hotel and Restaurants' Association (KPHRA) had earlier threatened to stop takeaway services over refusal to allow dine-in facility in the fourth phase of the lockdown. 

B Chandrashekar Hebbar, president of KPHRA said that the CM urged hoteliers to wait for three days, assuring that a decision will be taken. 

"We appraised the government over the mounting losses by keeping just take-away services open. Noting that social distancing and other guidelines will be followed, we urged him to allow dine-in facility," he said.

The Association will wait three more days before discontinuing parcel services, Hebbar said. 

The government also provided relaxation to hotels from the total lockdown announced in Karnataka on Sundays, he said. 

A package for hotel employees such as cooks and waiters, along the lines of those announced for farmers, cab drivers and weavers, was also sought in a petition submitted to the chief minister.

In fact the state government had expressed its willingness to open hotels under the Lockdown 4.0, subject to restrictions. However, the central guidelines do not allow dine-in services.