The nation wants to know: Why did Arnab quit as editor-in-chief of Times Now?

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

New Delhi, Jun 7: The Karnataka government has asked the railways to make announcements at originating stations that it was compulsory for passengers travelling to the state to register themselves on the ‘Seva Sindhu’ portal through which they can be tracked.

In a letter to Chairman Railway Board on Saturday, Chief Secretary of the state T M Vijay Bhaskar said many passengers are not aware of this mandatory rule of the southern state.

He said thousands of passengers are coming to Karnataka from New Delhi, Bihar, Maharashtra and other states through trains everyday, but most of them are not registered under the Seva Sindhu portal of the Government of Kamataka.

"If passengers are not registered under Seva Sindhu, the state will not be able to track them. Therefore, it is necessary to create awareness among the passengers regarding registration under the portal.

"Hence, it is requested to give instructions to origin railway stations to make announcements that ‘It is compulsory for all passengers travelling to Karnataka to register in Seva Sindhu portal. Otherwise they will not be allowed for home quarantine’, and also to give passengers awareness (about this) at the time of booking tickets,” Bhaskar said in his letter to the national transporter.

Seva Sindhu portal, under the control of the Karnataka government, provides various online services to the citizens of the state.

Currently, this portal is playing an important role in helping those stranded amid the COVID-19 pandemic to fill online registration forms for availing e-passes.

Udupi, June 10: Philanthropist and businessman Haji P K Abuswalih Kannangar passed away today at a private hospital in Mangaluru. He was 85. 

He was a resident of Pombathota house at Kannangar in Kaup taluk of Udupi district.

He was the proprietor of Green Store in Mudigere for past five decades and also was a coffee planter. 

He had served as the president of Muhayaddin Juma Masjid at Mudigere Hand-post in the past. He was also former president of Mudigere Taluk unit of Indian National Congress.