script to unify 22 languages


IIT prof writes one script to unify 22 languages


READ MORE the script
CHENNAI: India has 22 official languages. Schools teach in 58 different languages. There are newspapers in 87 languages. And, about a dozen major scripts are used to communicate in these languages.

Though the country once boasted about this linguistic complexity, people have since found that it poses barriers to effective communication.

An ideal situation would be the use of a single language across India, but researchers feel that it is too ambitious a project. "There are impossible difficulties to creating a unified language in India, not least because of the huge emotional component," said V Srinivas Chakravarthy, an IIT-Madras professor. A simpler goal would be to figure out a unified script that can convey information in all Indian languages, said the professor of biotechnology, whose work spans computational neuroscience and pattern recognition.

Chakravarthy has drawn up one such script that he calls Bharati, which can be used for regular writing and can be learnt easily. "Anyone who knows one of the major Indian scripts can learn Bharati script in an hour," said Chakravarthy, who has applied for a patent for the Bharati script.

Most Indian alphabet systems are organised as vowels and consonants; Bharati follows this pattern without the elaborate flourish. The script combines the simplest features of several existing scripts to come up with a new one that is logical and simple.

Chakravarthy said English is arbitrary. "There is no logic to why A comes first and Z last. Indian scripts are logical," he said. "But, they are also unreasonably complicated and ornate."

For instance, he said, the long form of the alphabet that makes the sound 'ah' in the Devanagiri/Hindi script is written by adding a vertical bar to produce the sound 'aah'. The long form of the alphabet making the sound 'e' is written by adding a hook to make the 'ee' sound.

"Why should we have so many different conventions just to denote the long version of a vowel?" said Chakravarthy. He studied these inconsistencies and made sure that the Bharati alphabets follow a consistent design.

Experts welcome the initiative, saying Indian languages had a lot of shared words. "It's a good attempt that can bring people together. But, whether people, politicians or teachers like me will let it happen is a different thing," said S C Chaudhary, member of the Indian Linguistic Association in Pune. He hoped that the effort would put an end to the domination of English, which is threatening to overtake all other languages.

Awadesh Kumar Mishra, director of Central Institute of Indian Languages in Mysore, said such a script would be useful for the average Indian, who is likely to know just one language. The Technology Development for Indian Languages programme, initiated by the ministry of communication and information technology, is making a similar attempt to facilitate human-machine interaction without a language barrier, he said.

Chakravarthy's script has immediate application in signs, especially at tourist attractions. Bharati can be developed into an online handwriting recognition system for Indian languages on smartphones and PDAs because it can be used to help develop better algorithms to recognise all languages.

ONE MORE STUDY,MANY MORE QUESTIONS


Global warming may raise sea levels by more than 2 metres: Study


Global warming may raise sea levels by more than 2 metres: Study
Half of that rise might come from ice-loss in Antarctica which is currently contributing less than 10 per cent to global sea-level rise.
Berlin: Each degree celsius rise in global temperatures is likely to raise world's sea levels by more than 2 metres within the next 2,000 years, a new study has warned.

While thermal expansion of the ocean and melting mountain glaciers are the most important factors causing sea-level change today, the Greenland and Antarctic ice sheets will be the dominant contributors within the next two millennia, according to the study published in the Proceedings of the National Academy of Sciences.

Half of that rise might come from ice-loss in Antarctica which is currently contributing less than 10 per cent to global sea-level rise.

"CO2, once emitted by burning fossil fuels, stays an awful long time in the atmosphere. Consequently, the warming it causes also persists," said Anders Levermann, lead author of the study and research domain co-chair at the Potsdam Institute for Climate Impact Research.

The oceans and ice sheets are slow in responding, simply because of their enormous mass, which is why observed sea-level rise is now measured in millimetres per year.

"The problem is: once heated out of balance, they simply don't stop. We're confident that our estimate is robust because of the combination of physics and data that we use," Levermann said in a statement.

The study is the first to combine evidence from early Earth's climate history with comprehensive computer simulations using physical models of all four major contributors to long-term global sea-level rise.

During the 20th century, sea level rose by about 0.2 metres, and it is projected to rise by significantly less than two metres by 2100, even for the strongest scenarios considered.

At the same time, past climate records, which average sea-level and temperature changes over a long time, suggest much higher sea levels during periods of earth's history that were warmer than present.

For the new study, the international team of scientists used data from sediments from the bottom of the sea and ancient raised shorelines found on various coastlines around the world.

If global mean temperature rises by 4 degrees compared to pre-industrial times, which in a business-as-usual scenario is projected to happen within less than a century, the Antarctic ice sheet will contribute about 50 per cent of sea-level rise over the next two millennia, researchers said.

Greenland will add another 25 per cent to the total sea-level rise, while the thermal expansion of the oceans' water, currently the largest component of sea-level rise, will contribute about 20 per cent, and the contribution from mountain glaciers will decline to less than 5 per cent, mostly because many of them will shrink to a minimum, the study found.

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'THE 7 YEAR ITCH'


Earth’s 6-year twitch alters day length


LONDON: Periodic jumps generated in the Earth's core change the length of a day every 5.9 years on our planet, a new study has found.

Researchers at the University of Liverpool in the United Kingdom studied the variations and fluctuations in the length of day over a one to 10 year period between 1962 and 2012.

They found that variations in the length of day over periods of between one and 10 years are caused by processes in the Earth's core. The Earth rotates once per day, but the length of this day varies. A year, 300 million years ago, lasted about 450 days and a day would last about 21 hours, researchers said.

As a result of the slowing down of the Earth's rotation the length of day has increased.

The rotation of the Earth on its axis, however, is affected by a number of other factors — for example, the force of the wind against mountain ranges changes the length of the day by plus or minus a millisecond over a period of a year.

Professor Richard Holme, from the School of Environmental Sciences studied the variations and fluctuations in the length of day over a one to 10 year period between 1962 and 2012.

The study took account of the effects on Earth's rotation of atmospheric and oceanic processes to produce a model of variations in the length of day on time scales longer than a year.