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Mangaluru, Mar 16: As a precaution against the spread of Covid-19, the Karnataka State Road Transport Corporation (KSRTC) on Monday decided to cut down its premium, non-AC sleeper, Rajahamsa and express bus services from Mangaluru to Bengaluru and Kasaragod following poor patronage.

The cut down in services is as per the direction of KSRTC's Central office that wants bus services to be operated on priority.

KSRTC Mangaluru Divisional Controller S N Arun said that the corporation has decided to cut down 40 trips to Bengaluru. Concerning Kasaragod, it has reduced the number of trips from 40 to 35. "These include a reduction in services to Mysuru and Dharmasthala also," he added.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Davangere, Jul 19: A 9-year-old sniffer dog ran 12 km in the night to trace a murder accused and helped the police arrest him in Karnataka's Davangere rural area, an official said on Sunday.

"Doberman Pincher Tunga ran 12 km non-stop from the crime spot at Basavapattana in the city to a house at Kashipur in the rural where murder accused Chethan, 25, was hiding and helped us arrest him on July 17," Davangere Police Superintendent Hanumantha Rai said on phone.

Davangere is 260 km northwest of Bengaluru.

"Though Chethan allegedly shot dead his friend Chandra Nayak with a stolen service revolver on July 10 over sharing the booty (gold ornaments) of the theft they had committed recently with two others. We took female dog Tunga to the crime spot on July 16. She led the sleuths to the area where Chethan was hiding with two accomplices," Rai recalled.

While trained sniffer dogs normally run 4-5 km from a crime spot, Tunga could track the accused 12 km away.

When Tunga's handler (Head Constable Prakash) took her to the crime scene at 9.30 pm, she sniffed around and ran 12 km non-stop to Kashipur. She halted at a wine shop and went to a food joint later. Then she stopped at a house nearby at 12.30 am.

The prime accused (Chethan) was present in the house of his relative. He was arrested after he confessed to the theft and the murder.

The police are on the hunt to trace Chethan's two accomplices who fled from the house they were hiding in.

Karnataka Additional Director General of Police (law and order) Amar Kumar Pandey felicitated Tunga on July 17 at a function here for cracking the murder case with its exceptional sniffing traits.