Dr Jessy D'Souza elected president of South Kanara Chess Association

Bengaluru, Apr 16: Special Investigating Team (SIT), headed by Joint Commissioner of Police (Crime), Sandeep Patil, subjected former underworld don turned social activist Muthappa Rai in connection with gangster and underworld don Ravi Poojary's criminal cases.

Sandeep Patil, Joint Commissioner of Police (Crime) said that the Assistant Commissioner of Police, Venugopal and police inspector Bulletin have questioned Rai in his house for more than two hours about Ravi Poojary case.

Muthappa Rai was allegedly one of the accused in builder Subbaraju murder case. They both were allegedly close in the initial days and they were like a team, said a senior officer. So Rai was questioned about their connection. Rai, who reformed himself many years ago, is into business and social service at present.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Kasaragod, Apr 24:  Stricter measures have been enforced in more places in this district, as part of intensifying efforts aimed at containing the spread of Covid19.

According to District Collector Dr Sajith Babu, the new norms of intensified lockdown would be enforced in Kumbala, Mogral-Puthur, Chemmanad, Madhur, Muliyar and Kumbala grama panchayats, being identified as new hotspots in the district.

Earlier, door-to-door police patrolling at regular intervals have been implemented in Thalankeri, Choori, Kalanad and Nellikkunnu, where more positive cases of Covid-19 has been reported.