Category Archives: Science & Technologies

India’s first woman sound engineer, unsung yet

Meena Narayanan.
Meena Narayanan.

Meena learnt every aspect of sound engineering from noted sound engineer Poddar

madisar (9-yard saree wrapped in a certain manner) clad woman moving in and out of the Island Ground, the venue, and documenting the event, was an unusual sight in the Eucharist Congress held in Chennai in 1937. The lady was Meena Narayanan, India’s first woman sound engineer, who produced a documentary of the Congress, attended by Most Rev Leo Peter Kierkels, the Apostolic Delegate, who had been appointed as special Papal Legate.

“It was unthinkable that at a time when cinema was considered a taboo, she made an entry into the film world and became a successful sound engineer. Both she and her husband Narayanan deserve a separate book,” said film historian S. Theodore Baskaran, who has written about the couple in his book The Message Bearers.

They were from Sivaganga district and Meena’s father Seetha Rama Iyer was the registrar of the Madras High Court. It was Narayanan, who started his career as film distributor, first set up a Sound Studio in Chetpet-Kilapuk area on the Poonamallee High Road in 1934. Sree Srinivasa Cinetone or Sound City was the first talkie recording studio.

“When he commissioned the noted sound engineer Poddar to work for his studio, Narayanan assigned his wife Meena as his assistant. She worked with Poddar for the film Srinivas Kalayanam produced at a cost of ₹60,000. It was released in Crown and Broadway,” said journalist and historian Nivedita Louis.

By the time Poddar quit the studio, Meena, who had just completed high school, had learnt every aspect of sound engineering. Narayanan used her as the sound engineer for the next film Viswamitra.

“There are a lot of problems when sound recording is done by those who have no idea of the language and trend in music. This can be attributed to the poor quality of Tamil films. Since I wanted to rectify it, I paid attention to sound engineering and gained experience in two years,” Meena had said in an interview to the Tamil magazine Ananada Vikatan in 1936.

“Meena, who trained in music and could sing well, continued to function as sound engineer for the films Krishna Thulabaram, Vikrama Shree SahasamTulsi BrindaPorveeran ManiaviMada SampiraniSree Ramanujan and Vipra Narayana. But the death of her husband Narayanan in 1936, turned her life upside down,” said Ms. Louis. She lived in a house near T. Nagar Park after the death of her husband. Her daughter Kalavathi, an oncologist by training returned to India, after spending many years in the UK and the U.S.

“Meena’s son Srinivasan had a passion for rail engines and railway tracks. He created a miniature track and would run trains in houses,” recalled Jayanthi Ramesh, one of the family members of Meena. Her last days were spent in the house of Nobel Laureate C.V. Raman and husband of her aunt Logasundarai. She died of heart attack while on an excursion to Kodaikanal in 1954.

“We are keen to publish a book about her and other family members,” said Ms. Jayanthi Ramesh.

source: http://www.thehindu.com / The Hindu / Home> News> Cities> chennai / by B. Kolappan / Chennai – September 19th, 2019

Now, fish farmers can produce own farm feed

Floating feed production capacity of this feed mill is 100-150kg per hour and sinking feed production capacity is 400-500 kg per hour.

Chennai :

Fish farmers can soon prepare their own farm feed under an expert’s guidance as Tamil Nadu Dr J Jayalalithaa Fisheries University (TNJFU) has established an aqua feed extrusion mill at  Muttukadu.
The feed manufacturing mill, that has come up at a cost of Rs 3.98 crore at the university’s directorate of incubation and vocational training in aquaculture (DIVA) located at Muttukadu, has been established to develop new cost-efficient feed technologies and formulations which will be disseminated to fish farmers for preparing their own on-farm feed at a lesser cost, compared to commercial feeds available in the market.

Vice-chancellor of the university, S Felix said fish farmers from across the State, can visit the plant with their raw materials and will be provided all necessary assistance to make their own fish feed. Felix said that the aim of the project is to help fish farmers in minimising the feed cost in fish farming and enhance their profitability. The mill will be inaugurated within a fortnight. The mill will also boost the research activities to develop cost-efficient feeds formulations for Tilapia and Pangasius fish varieties and special broodstock feeds for Carps, said the varsity official.

Floating feed production capacity of this feed mill is 100-150 kg per hour and sinking feed production capacity is 400-500 kg per hour.

The cost of new aquafeed extrusion mill building is Rs 50 lakh. The mill has been established under the project on the development of cost-efficient feeds, funded by NADP.

MoUs to be signed
The TNJFU will soon sign a memorandum of understanding with fisherfolk, farmers and new feed mill companies, to transfer the technologies.“The fish feed manufactured in our mill will be much cheaper than the products of private companies,” said Felix.

source: http://www.newindianexpress.com / The New Indian Express / Home> States> Tamil Nadu / by Binita Jaiswal / Express News Service / September 03rd, 2019

Science fair concludes, cash awards given

The National Science and Technology Fair organised by Coimbatore District Small Industries Association (Codissia) drew to a close on Saturday, with six exhibits of school and college students bagging cash awards.

In the ‘Colleges’ category, PSG College of Technology, Coimbatore, won the first place with a cash award of ₹ 50,000. Kongu Arts and Science College, Erode, and KPR Institute of Engineering and Technology, Coimbatore, won the second and third prizes, with cash awards of ₹ 40,000 and ₹ 30,000 respectively.

Delhi Public School, Coimbatore, came first in the ‘Schools’ category, and won a cash award of ₹ 25,000. Bannari Amman Public School, Sathyamangalam, and Vadanta International School, Jaipur, Rajasthan, came second and third, winning ₹ 20,000 and ₹ 15,000 respectively.

source: http://www.thehindu.com / The Hindu / Home> News> Cities> Coimbatore / by Staff Reporter / Coimbatore – August 31st, 2019

Subrahmanyan Chandrasekhar: A shining star of astrophysics

This great astrophysicist strongly influenced our understanding of stellar objects, black holes, white dwarfs and conducted remarkable work on Newton’s seminal work titled Philosophiae Naturalis Principia Mathematica.

As a young boy, astrophysicist and mathematician Subrahmanyan Chandrasekhar had a deep desire to be like Isaac Newton. Often, he used to go to the beach alone, and pray: ‘Oh God, may I be like Newton!’(Illustration: Rushikesh Tulshiram Gophane)
As a young boy, astrophysicist and mathematician Subrahmanyan Chandrasekhar had a deep desire to be like Isaac Newton. Often, he used to go to the beach alone, and pray: ‘Oh God, may I be like Newton!’(Illustration: Rushikesh Tulshiram Gophane)

Chandra, as he was widely known, was born on October 19, 1910, in Lahore, to Tamil parents Sitalakshmi Balakrishnan and Chandrasekhara Subrahmanya Ayyar. His father was the deputy auditor general of the Northwestern Railway. The family moved to Allahabad in 1916 and settled in Madras in 1918.

Early life and education

Chandrasekhar was homeschooled till the age of 12. He then attended the Hindu High School at Triplicane, Madras and studied at Presidency College, Madras from 1925 to 1930. During this stint, he met Lalitha Doraiswamy and they got married in 1936.

A highlight of his college years was the publication of his paper, The Compton Scattering and the New Statistics. Successes such as this strengthened his determination to pursue a career in scientific research despite his father’s wish for him to join Indian Civil Service.

In 1930, Chandrasekhar was awarded a government scholarship to pursue graduation at the University of Cambridge, United Kingdom and he joined Trinity College. During this time, Chandra became enamoured with the subject of white dwarf stars. He explained how when stars run out of hydrogen, they become unstable and collapse in on themselves. But the most massive stars explode into a supernova and then collapse down into neutron stars, or black holes. He earned a PhD in 1933 and was elected to Prize Fellowship.

Career

In 1937, Chandrasekhar was appointed assistant professor in the University of Chicago – a position he continued in for his entire career spanning six decades. In 1947, he was appointed the distinguished service professor of theoretical astrophysics and, in 1985, became the professor emeritus.

As the editor of The Astrophysical Journal (1952-1971), he transformed the private publication into the National Journal of the American Astronomical Society. Apart from his work at the University, he also conducted research at NASA’s Laboratory for Astrophysics and Space Research.

In 1990, he began working on the detailed geometric arguments in Sir Isaac Newton’s famous work Philosophiae Naturalis Principia Mathematica, which is considered a significant work in the history of science. He died on August 21, 1995 of a heart attack.

Chandrasekhar Limit

He is best known for the discovery of the Chandrasekhar Limit, which he came up with as a student. Using this, he proved that there is a maximum mass which can be supported against gravity by the pressure made up of electrons and nuclei.

Awards, achievements

Chandra was honoured with the Padma Vibushan in 1968. In 1983, he was jointly awarded the Nobel Prize in Physics along with William A Fowler for work on the structure and evolution of stars. He was, however, upset that the citation mentioned only his earliest work and not his later ones. Chandrasekhar was awarded the Gold Medal of Royal Astronomical Society (1953), the Royal Medal (1962), and the Copley Medal (1984).

He has authored several books including – An Introduction to the Study of Stellar Structure (1939), Principles of Stellar Dynamics (1942), and Newton’s Principia for the Common Reader (1995).

Interesting Facts

1. He was the nephew of Sir CV Raman, who was a Nobel Prize recipient. Chandrasekhar became a US citizen in 1953, retired from the University of Chicago in 1980, and continued to be a researcher.

2. In 1979, NASA named the third of its four Great Observatories after Chandrasekhar. The Chandra X-ray Observatory was launched and deployed by Space Shuttle Columbia on July 23, 1999.

3. The Chandrasekhar number, a vital dimensionless number of magneto hydrodynamics, was named after him as were the asteroid 1958 Chandra and the Himalayan Chandra Telescope.

4. The Chandra Astrophysics Institute runs an initiative for high school students interested in astrophysics. They are mentored by scientists from MIT and sponsored by the Chandra Observatory.

5. His brother, S Balakrishnan, revealed that as a boy, Chandra had a deep desire to be like Isaac Newton. He used to go to the beach alone, and pray: ‘Oh God, may I be like Newton!’

Source: famouspeople.com; notablebiographies.com;Wikipedia

source: http://www.hindustantimes.com / Hindustan Times / Home> India> Inspiring Lives / by HT Correspondent, Hindustan Times, New Delhi / August 21st, 2019

App uses AI to detect banana pest, diseases

Versatile: The App can detect symptoms on any part of the crop and is trained to read even images of lower quality. | Photo Credit: Special arrangement
Versatile: The App can detect symptoms on any part of the crop and is trained to read even images of lower quality. | Photo Credit: Special arrangement

An App using this tool can diagnose the disease and give treatment options

Identifying diseases and pests on banana crops will now be just a click away. Researchers have developed a new artificial intelligence system (AI) which can look at photographs and tell what disease the plant has and also give recommendations and treatment options to the farmers. The results showed that the model was over 90% accuracy.

Training the network

The neural network was given about 20,000 images showing diseased and healthy plants. “Just like teaching a kid to tell an elephant from a horse, we taught the AI to identify leaf, root, fruit diseases and pests. Pictures from Uganda, Colombia, Congo and India were fed into the system for the training,” says Dr. Sivalingam Elayabalan from the Department of Biotechnology, Imayam Institute of Agriculture and Technology (IIAT), Trichy, Tamil Nadu. He is one of the authors of the study published in Plant Methods.

The tool is now incorporated into an App called Tumaini, meaning hope in Swahili, and being tested.

Expansion of scope

The team is planning to add more diseases based on regions and also make the App available in local languages. “When users take the photo, it gets uploaded to a global system for large-scale monitoring. Also, it is automatically GPS-tagged so we know what and where the problem is. We are also planning to incorporate high-resolution satellite monitoring to check the health of large fields,” explains Dr. Michael Gomez Selvaraj, from the International Center for Tropical Agriculture (CIAT), Colombia in an email to The Hindu. Dr. Selvaraj is the senior author of the paper. The App can detect symptoms on any part of the crop, and is even trained to read images of lower quality.

Major Indian diseases

The app is now being tested across many countries and when the confidence of 100% is reached it will be available for free download. “Yellow leaf spot and Fusarium wilt are the major fungal diseases in India and farmers spend a lot of money on fungicides. Apart from the fungal disease, the viral disease such as Banana Bunchy top virus is a big problem in hilly areas of Tamil Nadu, Kerala and Northeast region. The App can tell the farmers in advance bringing down the treatment costs,” says Dr. Elayabalan. “We are now testing the App in Tamil, and it will soon be available in Hindi and Malayalam. The National Research Centre for Banana (NRCB) and the Indian Council of Agricultural Research (ICAR) have shown interested in the App.”

source: http://www.thehindu.com / The Hindu / Home> Sci-Tech> Science / by Aswati Pachi / August 17th, 2019

IIT-Madras develops cells to be used in cancer research

The research is significant as stem cells are difficult to isolate and grow. Research is being conducted all over the world, to extract and culture CSCs for cancer understanding and drug development.

Chennai :

Researchers of the Indian Institute of Technology Madras (IITM) have found that subjecting cancer cells to microgravity, results in the formation of giant cancer cells with stem-cell characteristics, which can be used for cancer research and drug development, said a statement issued by the Institute.

The research was led by Professor Rama S Verma, Stem Cell and Molecular Biology Laboratory, Department of Biotechnology, IIT Madras. Speaking about the research, Verma said the stem cells obtained using micro. The research is significant as stem cells are difficult to isolate and grow. Research is being conducted all over the world, to extract and culture CSCs for cancer understanding and drug development. gravity can also be used to understand the nature of the cancer cells, their proliferation and cell death pathways, which in turn, can help in the identification of target zones for drug development.

He further added, “We have shown that simulated microgravity can be used for the development of stem cell structures for drug testing, instead of animal models. Cancer Stem Cells(CSC) are important in cancer research because they not only instigate the formation of tumour, but are also involved in recurrence of tumours after cancer treatment.”

The research is significant as stem cells are difficult to isolate and grow. Research is being conducted all over the world, to extract and culture CSCs for cancer understanding and drug development. “These stem cells can be used for cancer research and drug development,” said Verma.

source: http://www.newindianexpress.com / The New Indian Express / Home> Cities> Chennai / by Express News Service / August 21st. 2019

Innovative app fetches Chennai girls top spot in U.S. contest

Girl power: Social Relay, the team which won the Technovation challenge.
Girl power: Social Relay, the team which won the Technovation challenge.

‘Baton’ designed to maximise the impact of initiatives started by interns in the field of social work.

‘Social Relay’, a team of three school girls from Chennai, bagged the first place at Technovation Girls organised in the United States of America by Technovation, a global not-for-profit organisation that focuses on technology education. The team won a prize money of $12,000.

The team members — Akshara Vasanth, a Class VI student of PSBB School K.K. Nagar, Ishwarya Kanagaraj, a Class VII student from the Panchayat Union Middle School Poothapedu and Stella Arokiasamy, a Class IX student of Our Angel Matriculation School — were mentored by Tanya Elizabeth Ken, a Class XI student of Kola Perumal Chetty Vaishnav School. Both Stella and Aishwarya stay at Paadhai, a home in the city for destitute children.

At the World Pitch 2019, the finals, Social Relay pitched their app ‘Baton’, which was designed to maximise the social impact of initiatives started by social work interns or students’ internships. “The app works around the idea of a relay race, where the baton is handed over and aims to hand over incomplete social work initiatives from one intern to another so that they are not affected by internships which last only for a limited time. It will bring together social workers, students, corporates, NGOs and volunteers,” the team said.

Dreaming big

Speaking from California, Akshara Vasanth said she was thrilled with her team’s win. “This is not just a great opportunity for me, but for girls from across the world. We are looking forward to develop our app further and take it across the country as well as the world,” she said.

The team from Chennai was among six from across the world in the junior division at the World Pitch, which was the final event of Technovation Girls, where they exhibited the functioning of their apps. Over 2,000 teams from 57 countries participated in the competition and six teams each were selected as finalists in the junior and senior division.

“Lack of a social worker empowerment tool is a problem across the world and the team believes that Baton is the solution, as it brings together key stakeholders for achieving social impact, while optimizing social work,” said Tanya, speaking from California.

“I hope more girls are inspired and encouraged to delve into technology and innovation,” she added.

The program encourages girls between the ages of 10 and 18 years from across the world to use technology and apply the skills needed to solve real life problems.

source: http://www.thehindu.com / The Hindu / Home> News> Cities> Chennai / by Staff Reporter / Chennai – August 19th, 2019

Dr. M.S. Swaminathan Award for Environment Protection presented

Former Justice Prabha Sridevan, right, presenting the award to Kenneth M. Quinn. Rotary Club of Madras East vice-president T.R. Gopalakrishnan is also seen.
Former Justice Prabha Sridevan, right, presenting the award to Kenneth M. Quinn. Rotary Club of Madras East vice-president T.R. Gopalakrishnan is also seen.

Former diplomat Kenneth M. Quinn honoured at event

Former U.S. Ambassador to Cambodia and President, World Food Prize Foundation, Kenneth M. Quinn on Thursday underlined the need for encouraging small holder farmers, who are mostly women, to run their farms.

Speaking to reporters after receiving the Dr. M.S. Swaminathan Award for Environment Protection presented by the Rotary Club of Madras East and Cavinkare Private Ltd., he said post-harvest food waste must be brought down, which is why connectivity to small villages was important.

“Small farmers need to take their produce to markets and they need to be provided the latest scientific inputs so that they be able to have sustainable farming practices to produce quality food,” he said, adding more should be spent on agricultural research.

Speaking at the award ceremony, he suggested that agriculture scientist M.S. Swaminathan be awarded the Rotary International’s award for world understanding and peace. Former Judge of the Madras High Court Prabha Sridevan thanked Mr. Quinn for working to rid the world of hunger and ensure access to quality food. UN-WHO Chief Scientist Soumya Swaminathan, and daughter of Prof. Swaminathan, said Mr. Quinn had brought about many improvements to the World Food Prize, including increasing the cash award.

Appreciating the Rotary International’s efforts for eradicating polio, she said the campaign was in its final stages. Club vice-president T.R. Gopalakrishnan and Cavinkare CMD C.K. Ranganathan were present.

source: http://www.thehindu.com / The Hindu / Home> News> States> Tamil Nadu / by Special Correspondent / Chennai – August 09th, 2019

e-slippers, gliding platforms and more: meet the student innovators of Maddur

Students of Buchireddy Palli Government School with their invention — a walking stick with sensors. | Photo Credit: B. Jothi Ramalingam
Students of Buchireddy Palli Government School with their invention — a walking stick with sensors. | Photo Credit: B. Jothi Ramalingam

The students of Buchireddy Palli Government School have been winning accolades for their clever innovations aimed at saving lives

It is morning in Maddur, a little village nestled in the valley of the lush Tiruttani hills in Tamil Nadu. I make my way past the railway crossing that looks straight out of an R.K. Narayan story and climb into a rickshaw. It takes me past houses with decorative pillars and thinnais(porches) of old-fashioned houses. As the auto sputters down, I hear the rattle of power looms — the main occupation in Maddur is weaving.

Maddur, of late, has earned a new distinction. The students of Buchireddy Palli Government School have been winning accolades for their clever innovations aimed at saving lives and improving the lives of people with disability. Maddur has few streetlights, and many pedestrians fall prey to road accidents. So Class X students S. Parthiban and V.M. Akashwaran came up with ‘e-slippers’.

The footwear operates on the principle of piezo-electricity and has LED strips that light up when the user walks. Rechargeable lithium-ion batteries, which charge devices like mobile phones, are connected to the slippers.

The duo has also come up with a multi-purpose walking stick with sensors that can detect hazards such as fires or floods.

The Buchireddy Palli Government School is an austere, three-storied building that houses both English and Tamil medium departments from classes VI to XII. When I get there just before lunch break, I spot some bright-eyed children sneaking out of their classrooms. Science teacher R. Dharmalingam, has nothing but appreciation for his students. “They are self-driven, curious and never afraid to ask questions,” he says.

“Most of their projects are self-funded, but the headmaster has also helped. I have sat with them after school hours to encourage them.” The school’s involvement is obvious. Dharmalingam accompanied Akashwaran and Parthiban when they showcased their work at the Southern India Science and Technology Fair in Bengaluru.

Out of the box

At Akashwaran’s house, we are greeted with effusive hospitality. Akashwaran and his friend Gunasekaran, still in their uniforms, are poring over a cardboard model. I ask them what they are working on. “This is a gliding platform meant for people with disability or the elderly so that they can cross railway platforms without having to use the overbridge,” Akashwaran tells me. The two then demonstrate the working model.

Students with a model of a gliding platform for the elderly cross tracks   | Photo Credit: B. Jothi Ramalingam
Students with a model of a gliding platform for the elderly cross tracks | Photo Credit: B. Jothi Ramalingam

Akash thought of this when I complained about the climb at the station. Since then he’s been trying to figure out a workable solution,” beams his mother Vatsala.

“It used to be based on hydraulic motion but I changed it to a motor-based system. The platform will move forward when the switch is pressed. IR sensors will detect approaching trains and the platform will then retreat,” Gunasekaran explains. They have even thought about warning systems — a buzzer sound to alert the blind and a flashing red light for the deaf.

M.N. Haripratap is in Class IX in the same school. He has designed a bridge model where the structure opens up during high tide to allow ships to pass and then folds back again. It won him a district-level prize from the Chief Education Officer of Thiruvallur district.

The students’ love for science and innovation is apparent. “Akash took part in a science exhibition at Sri Krishna Polytechnic and was fascinated by what he saw,” says Vatsala. Interested in electronics, programming and robotics, he recently received a special prize for excellence in science from Anna University, Chennai, during its tech fest, ‘Kurukshetra’. He was also awarded a token of appreciation by former ISRO director Mylswamy Annadurai.

“I want to be a scientist,” says Akash. “Abdul Kalam has always been a role model for me.” I ask him what’s next on the agenda. His small, serious face lights up as he talks of solar-powered cycles, ambulance-sensitive speed-breakers, and earthquake-sensing fences.

Whatever the students of this special school do next, I know they will put Maddur on the map with their thoughtful, people-focused innovations.

The writer is a civil engineer and dog lover with a nose for music and art.

source: http://www.thehindu.com / The Hindu / Home> Sci-Tech> Environment – Young Minds / by Gayatri Ramdas / August 03rd, 2019

Google Doodle celebrates Dr. Muthulakshmi Reddi, India’s first woman legislator

Google doodle on Dr. Muthulakshmi Reddi
Google doodle on Dr. Muthulakshmi Reddi

She was also one of the first women doctors in India and the first woman house surgeon in the Government Maternity Hospital, Madras

Today’s Google Doodle celebrated Dr. Muthulakshmi Reddi, a surgeon, educator, lawmaker and social reformer, on her 133rd birth anniversary. Dr. Reddi devoted her life to public health and fought the battle against gender inequality. The Government of Tamil Nadu announced on Monday that government hospitals in the State will celebrate her birth anniversary as ‘ Hospital Day ‘ every year .

Born in 1886 in Pudukkottai, Tamil Nadu, Dr. Reddi was the first Indian girl student in the Department of Surgery at Madras Medical College. This was just one of her many firsts. She became one of the first women doctors in India in 1912, and the first woman house surgeon in the Government Maternity Hospital, Madras.

She co-founded the Women’s Indian Association in 1918, and as the first woman member (and vice president) of the Madras Legislative Council — making her the first woman legislator in India — she helped raise the minimum age for marriage for girls and pushed the Council to pass the Immoral Traffic Control Act, and the Devadasi system abolishment Bill.

She resigned from the Council to support the Salt Satyagraha. When three young devadasi girls knocked on her door in 1930, she established the Avvai Home to shelter and educate girls like them.

In 1954, she opened the Cancer Institute in Chennai and in 1956 was awarded the Padma Bhushan. She passed away in 1968 at the age of 81.

Here is Dr. Reddi herself on the role of women in an article published  in the August 15, 1947 Independence Day edition of The Hindu:

“Indian women have a great role to play in the modern world, with its chaos and rumblings of another war. With their background of philosophy and religion, with their apprenticeship under Gandhian leadership, with the sense of motherhood strong in them they can be and should be the ambassadors of love, peace and unity. It is the Gandhian concept of non-violence alone that can save the world from a cataclysm. And it is the women of India alone who can carry the message best so that the world may come together in unity and peace.”

The Doodle showing Dr. Reddi guiding young girls and women was created by Bangalore-based guest artist Archana Sreenivasan. The Doodle page also displays other early concepts drawn by the artist for this occasion.

source: http://www.thehindu.com / The Hindu / Home> News / The Hindu Net Desk / July 30th, 2019