Prasar Bharati Chairman Dr. A Suryaprakash called upon public broadcaster Akashvani and Doordarshan to study the social impact of Government programmes and relay success stories through its programmes.<br/>Speaking to Akashwani staff, in Bengaluru today, he said public broadcaster has a pivotal role to strengthen democratic principles and promote the country's culture and tradition. The Chairman also emphasised on the need to adopt to changing technologies in broadcasting and communicate to people in a medium most popular among the audience.<br/><br/>