Vivi Ntrigkogia, Marketing Director & Research Associate of CERTH, the state funded Center for Research in Thessaloniki, Greece, talks about Social Sensor, an EU funded project, that collects, processes and aggregates big streams of data. The platform leverages intelligent techniques to deliver personalised content to its users, while responding to the need for real-time social intelligence and responsiveness. Interviewed by Yannis Rizopoulos for Tech Talks Central.