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Yaegan Doran is a Lecturer in the Department of Linguistics and Research Fellow in the LCT Centre for Knowledge-Building at the University of Sydney. His research focuses on language, semiosis, knowledge and education from the perspectives of Systemic Functional Linguistics and Legitimation Code Theory, spanning the interdisciplinary fields of educational linguistics, multimodality, and language and identity.

J R Martin is Professor of Linguistics at the University of Sydney. His research interests include systemic theory, functional grammar, discourse semantics, register, genre, multimodality and critical discourse analysis, focussing on English and Tagalog - with special reference to the transdisciplinary fields of educational linguistics and social semiotics.

Michele Zappavigna is a Senior Lecturer at the University of New South Wales, Sydney. As a linguist, her primary focus is on exploring the language of microblogging and social media. Her research in this area investigates discursive patterns in social media texts and corpora.