MCC meeting: Decision on 24-houre water supply put off

Mangaluru, May 17: A team of staff and students from the Department of Electrical and Electronics Engineering, NMAM Institute of Technology, Nitte, have designed and developed a simple and cost-effective touch-less hand sanitiser dispenser kit at Research and Innovation Centre, Nitte.

According to a release here on Sunday, NITTE said that the most effective medicine for Covid-19 is social distancing, frequent use of sanitiser, and washing hands regularly. In work areas, many people sharing common sanitiser might lead to issues.

The developed product dispenses sanitiser upon sensing the presence of the hand. The product has features like automatic hand detection, indication for power, and sanitiser quantity in the system.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Belagavi, Feb 11: Tension prevailed for sometime here after a few villagers spotted four country-made pistols disposed in the garbage site by the road between Markandey Nagar – Waghavade village on Sunday. Police rushed to the spot and seized the arms which are believed to be of Portugal era.

Sources said some villagers noticed a pistol lying along with heaps of refuse. They informed Bhavakanna Patil, the owner of the agricultural field adjacent to the garbage site. Patil and the villagers checked the garbage and found three more pistols totalling four.

Police said the pistols are about 50 to 60 years old. Going by their condition, all rusted, it is believed that they were left unused for a long time. The Belagavi rural police who have filed a suo motu case related to the incident are getting into the skin of case to trace the owners and those who disposed them in the garbage pit. 

According to preliminary investigation, it is learnt that such pistols were in vogue during Portugal rule in Goa. There are chances that those who inherited the arms may have disposed it for the fear of possessing weapon illegally. The chances of some notorious people who reside in the vicinity near Waghavade and surrounding areas, where burglaries and dacoity are frequently reported, disposing the arms due to the fear of police also cannot be ignored. Police Commissioner Lokesh Kumar was not available for comments.