RSS chief pays tribute to Gauri Lankesh, Dharam Singh

Mangaluru, Feb 26: Mangaluru Smart City Limited (MSCL) Managing Director Mohammed Nazir on Wednesday said that 13 Schools in eight wards, here, will be upgraded under the Area Based Development (ABD) of the Smart City Mission (SCM).

Mr. Nazir, in a statement, said that the Schools selected include Government Higher Primary School Car Street, Bastigarden, Neereshwalya, Hoigebazar Lower Primary School, Government Practicing HS, Balmatta Primary School, Balmatta Secondary School, Bunder Higher Primary School (Urdu), Bunder Government High School (Urdu) and Bolara East Government Primary School.

These Smart Schools will have IT-enabled interactive teaching and learning tools, computer labs and open reading plazas.

Washington DC, Jun 8: Astronomers acting on a hunch have likely resolved a mystery about young, still-forming stars and regions rich in organic molecules closely surrounding some of them.

They used the National Science Foundation's Karl G Jansky Very Large Array (VLA) to reveal one such region that previously had eluded detection and that revelation answered a longstanding question.

The regions around the young protostars contain complex organic molecules which can further combine into prebiotic molecules that are the first steps on the road to life.

The regions, dubbed "hot corinos" by astronomers, are typically about the size of our solar system and are much warmer than their surroundings, though still quite cold by terrestrial standards.

The first hot corino was discovered in 2003 and only about a dozen have been found so far. Most of these are in binary systems, with two protostars forming simultaneously.

Astronomers have been puzzled by the fact that, in some of these binary systems, they found evidence for a hot corino around one of the protostars but not the other.

"Since the two stars are forming from the same molecular cloud and at the same time, it seemed strange that one would be surrounded by a dense region of complex organic molecules and the other wouldn't," said Cecilia Ceccarelli, of the Institute for Planetary Sciences and Astrophysics at the University of Grenoble (IPAG) in France.

The complex organic molecules were found by detecting specific radio frequencies, called spectral lines, emitted by the molecules. Those characteristic radio frequencies serve as "fingerprints" to identify the chemicals.

The astronomers noted that all the chemicals found in hot corinos had been found by detecting these "fingerprints" at radio frequencies corresponding to wavelengths of only a few millimetres.

"We know that dust blocks those wavelengths, so we decided to look for evidence of these chemicals at longer wavelengths that can easily pass through dust," said Claire Chandler of the National Radio Astronomy Observatory, and principal investigator on the project.

"It struck us that dust might be what was preventing us from detecting the molecules in one of the twin protostars," added Chandler.

The astronomers used the VLA to observe a pair of protostars called IRAS 4A, in a star-forming region about 1,000 light-years from Earth. They observed the pair at wavelengths of centimetres.

At those wavelengths, they sought radio emissions from methanol, CH3OH (wood alcohol, not for drinking). This was a pair in which one protostar clearly had a hot corino and the other did not, as seen using the much shorter wavelengths.

The result confirmed their hunch. "With the VLA, both protostars showed strong evidence of methanol surrounding them. This means that both protostars have hot corinos. The reason we did not see the one at shorter wavelengths was because of dust," said Marta de Simone, a graduate student at IPAG who led the data analysis for this object.

The astronomers cautioned that while both hot corinos now are known to contain methanol, there still may be some chemical differences between them. That, they said, can be settled by looking for other molecules at wavelengths not obscured by dust.

"This result tells us that using centimetre radio wavelengths is necessary to properly study hot corinos," Claudio Codella of Arcetri Astrophysical Observatory in Florence, Italy, said.

"In the future, planned new telescopes such as the next-generation VLA and SKA, will be very important to understanding these objects," added Codella.

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.