The next speaker at ECREA 2012 is Maria Bakardjieva, who begins by noting the legacy of the public sphere concept – it has been enormously influential, especially also on central and eastern European scholars after the fall of the Iron Curtain.

My own paper starts the ICA-flavoured session at ECREA 2012 this afternoon; my presentation built on our research into the uses of Twitter to explore how we might reconceptualise the public sphere. The slides are below; audio will follow. now online, too.

Social Media, Big Data, and the Public Sphere from Axel Bruns

We move on to Stefania Milan as the next presenter at ECREA 2012. Her interests are in the social organisation of protest movements, especially through social media; what is the role of such media in the overall process, both at micro and meso levels? Collective action is a social construct which results for the interactions of social actors; their meaning construction is contextually embedded.

The next speaker in this ECREA 2012 session is Julie Uldam, who shifts our focus to the climate change debate, in the context of the UN climate change conferences. When the conference came to Copenhagen in 2009, it generated a substantial amount of activity by the climate change activists who are based in London, but the same cannot be said for the 2011 conference in Dublin.

The second ECREA 2012 keynote speaker this morning is Clemencia Rodríguez, who will be shifting our focus further towards citizens' media. She notes that it is important to take historical precedents seriously – reacting against the popular representation of recent political unrest as driven and determined by social media, and as leaderless revolutions.

From the excitement of a thoroughly inspiring AoIR 2012 conference, I've now made my way to Istanbul for this year's European Communications Conference, ECREA 2012. We open the conference with a keynote on e-democracy by Donatella dells Porta, considering the types of democracy which new social movements are envisaging.

The final speaker in this AoIR 2012 session is Sheetal Agarwal, whose focus is also on Occupy-related Twitter networks. Is Occupy a networked organisation, and if so, what kind of networked organisation? How might its organisational features be assessed? There are plenty of theories about organisation, from organisational sociology to political economy, which have been applied to the study of communication networks, international relations, and digital media.

The third speaker in this AoIR 2012 session is Sharon Strover, who begins by noting a racist YouTube video which complained about Asian students in the UCLA library and rapidly generated a substantial number of response videos; this can be seen as a form of civic engagement which must be distinguished from political participation.

The next speaker at AoIR 2012 is Sky Croeser, co-presenting with the very busy Tim Highfield. Her focus is on Occupy Oakland, a subset of the overall Occupy movement, and its use of the #oo Twitter hashtag. Occupy Oakland is shaped by the radical history of Oakland – the Black Panthers emerged here, and there have been more recent public protests in the city as well.