No re-evaluation of CBSE Class XII answer scripts from 2017

Bengaluru, Jan 16: Members and activists of social organisation Rakshana Vedike on Thursday staged a protest and demanded the arrest of BJP MLA Somashekhara Reddy, for his 'provocative' remarks and statements.

The protesters gathered near Gandhi’s statue near Maurya circle in the city and demanded that the BJP MLA should be arrested immediately.

The protesters alleged that Reddy’s remark were aimed at inciting communal hatred and that his remarks do not do justice to his being an elected representative of the people in the state assembly.

Mangaluru, Jan 29: The Indian Coast Guard today commissioned a high-speed coast interceptor boat at New Mangalore Port here giving a fillip to the coastal security.

The water jet propelled Interceptor Boat C-448 (27.80 mts in length) has an endurance of 500 nautical miles at 20 knots.

The vessel fitted with latest state of the art navigation and communication equipment can achieve a speed of 45 knots. Thus, the vessel is designed for high speed interception, close coast patrol, low intensity maritime operations, maritime surveillance, search and rescue.

The quick reaction capability coupled with modern equipment and system ensures that the vessel responds to any maritime situation. With a crew of 12 personnel, C-448 is Commanded by Assistant Commandant Apoorva Sharma.

The Interceptor Boat will be based at Mangaluru. T. M. Vijaya Bhasker, Chief Secretary Karnataka, who commissioned the IB, said that the crew should discharge their duties faithfully and with courage. Anand Prakash Badola, Commander, Coast Guard Region ( West) and A.V. Ramana, Chairman, New Mangalore Port Trust, were present on the occasion.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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