Teacher resigns after being asked to removehijab' by senior

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, May 5: The Dakshina Kannada district administration has denotified two containment zones, Sampya in Puttur and Thumbe in Bantwal. They were declared containment zones after one coronavirus positive case was reported from each area.

All the primary and secondary contacts of the patients have completed home quarantine period, said DC Sindhu B Rupesh.

The district administration hitherto had already denotified three other such containment zones based on a report of DHO,  after no new case was reported in the area in the last 28 days.

At present, the district has six containment zones-- Shakthinagara, Boloor, First Neuro Hospital in Mangaluru city, Uppinangady in Puttur, Kasaba and Narikombu in Bantwal taluk.

Bengaluru, July 17: The government of Karnataka has decided to issue caste and income certificates to Brahmins in the state to reduce the socio-economic inequality faced by the community.

“A notification has been issued to tehsildars in all 30 districts to issue caste and income certificates to Brahmins so that they can also benefit from the government schemes and scholarships,” a Revenue Department official told said.

The notification comes a month after the Karnataka State Brahmin Development Board on June 10 appealed to Chief Minister B.S. Yediyurappa to issue the certificates to the traditionally dominant community, which accounts for 3 per cent of the 7 crore state population.

“Though Brahmins are in ‘minority’ in terms of their population across the state, they need caste and income certificates to benefit from the welfare schemes meant for the economic weaker sections such as SC, ST and OBC groups,” the official said.

The board was set up in March 2019 as a state-run company with Rs 5 crore authorised capital and Rs 5 crore equity and is registered with the Registrar of Companies.

The notification was issued to the local bodies and taluk offices after several members of the community complained to state Revenue Minister R. Ashoka that they were unable to benefit from the welfare schemes in the absence of the certificates.

The certificates will also help students from the community to avail scholarships for higher studies from the state-funded board if their gross annual family income is less than Rs 8 lakh per year.

The board has also urged the state government to implement the 10 per cent quota for its community members under the economically weaker sections, as applicable for Central government jobs and admissions to central institutions.

Noting that every community has people who are forward and backward economically for various reasons, including historical, the official said the board would be empowered to serve the Brahmins.

“The board will provide interest-free loans to the financially weaker sections of the community,” said its Chairman H.S. Sachidananda Murthy.