Ramaswamy, the president of Indian Academy of Science, Bengaluru, was talking to reporters after delivering the D M Bose Memorial Lecture at Bose Institute here.
"We need to have more people coming in this profession and staying in this profession, people can be interested but you have to come all the way in doing serious research. That number is going down," he said.
"This is going to be a problem for us in times to come. It is going to be a problem as we are creating lots of universities, lots of research institutes which need teachers, people who can communicate ideas," Ramaswamy, a senior professor of Jawaharlal Nehru University, said.
"To make good advances you need to have large number of people working in the same areas, Then you can create better ideas," he said.
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To a question, Ramaswamy said the situation was better in West Bengal.
"In Bengal there is not dearth in the number of people pursuing pure science research as compared to other regions," he said.
Ramaswamy delivered lecture on the subject 'The spontaneous symmetry-breaking in dynamical systems' before an audience of senior scientists, students.
Stating that he was happy with the turnout and the post-lecture question and answer session, he said, "This is to be expected in a campus like Bose Institute. This can not happen in smaller places where people do not have much exposure to different ideas."
Bose Institute, set up in 1917 by Acharya Jagadish Chandra Bose, is Asia's first modern research centre devoted to interdisciplinary research.