Katakana: RSS suspends its programme over COVID-19

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jul 1: Karnataka Primary and Secondary Education Minister S Suresh Kumar on Wednesday played down reports about confusion regarding valuation of Second Pre- University and the Secondary School Leaving Certificate exam papers.

"Creating confusion has become a habit. There was confusion before the exam, during the exam and now confusion about the valuation of the exam papers," Kumar told reporters in Ramanagara when asked about the confusion over the valuation of answer sheets.

He had gone there to inspect a few centres where the SSLC or the 10th standard exams are underway.

The minister reminded people not to speak about the abilities of the students with contempt.

"Our students have toiled hard and are enthusiastically appearing for the examination. They are eligible for the marks they will score. So we should not speak about our children with disrespect," Kumar said.

The Education Minister said he had spoken to many leaders including former chief ministers Siddaramaiah and H D Kumaraswamy on conducting the examinations.

"Kumaraswamy had insisted on postponing the examination. I personally spoke to him and apprised him about the steps taken by us. I told him that we will work with more sincerity to ensure the safety of the children," Kumar said.

The SSLC exam was scheduled to take place from March 27 but due to the coronavirus-induced lockdown, it was postponed.

While the CBSE and a few other states either decided to give marks based on the students' performance in the previous examinations such as quarterly and half-yearly exams or gave general promotion to the students, Karnataka went ahead to hold the exam.

According to Karnataka Secondary Education Examination Board officials, around 8.5 lakh students have enrolled this year for the SSLC examination.

The exams are being held at 2,879 exam centres across the state.

Prior to the SSLC examination, the last exam of the Second PUC was also conducted on June 18, which was also put on hold due to the lockdown.

Gadag, May 9: It is the month of April, and the season of mangoes is very much here. However, the mango farmers of Gadag are suffering huge losses amid the coronavirus lockdown due to the absence of transportation facilities along with several other issues that have been impacting their business adversely.

Speaking to media persons, Vishwanath Odugowdar, a mango farmer said, "Due to transportation problems we are not being able to export mangoes to different countries. We are trying to sell them in nearby markets."

"We are not in a situation to pack, transport and export the mangoes to different countries as we did earlier especially 
when it comes to Alphonso mangoes which is one of the most loved varieties. So, we are packing mangoes at our place. Somehow this year we have got very good quality of mangoes," he added.

Farmers here are incurring huge losses as mandis and markets across the country are shut while the transport of Alphonso mangoes has also come to a halt owing to the lockdown.

The small and medium scale farmers in places like Gadag, Dharwad, Bagalkote in north Karnataka have started packing the mangoes themselves in their farms in a bid to sell the fruit themselves.