The Dynamics of <http://www.leydesdorff.net/autopoiesis/index.htm> Exchanges and References among Scientific Texts,
and the <http://www.leydesdorff.net/autopoiesis/index.htm> Autopoiesis of Discursive Knowledge <http://www.leydesdorff.net/autopoiesis/autopoiesis.pdf> <click here for pdf> Abstract Discursive knowledge emerges as codification in flows of communication. The flows of communication are constrained and enabled by networks of communications as their historical manifestations at each moment of time. New publications modify the existing networks by changing the distributions of attributes and relations in document sets, while the networks are self-referentially updated along trajectories. Codification operates reflexively: the network structures are reconstructed from the perspective of hindsight. Codification along different axes differentiates discursive knowledge into specialties. These intellectual control structures are constructed bottom-up, but feed top-down back upon the production of new knowledge. However, the forward dynamics of diffusion in the development of the communication networks along trajectories differs from the feedback mechanisms of control. Analysis of the development of scientific communication in terms of evolving scientific literatures provides us with a model which makes these evolutionary processes amenable to measurement. Diana Lucio Arias & Loet Leydesdorff Amsterdam School of Communications Research (ASCoR) Kloveniersburgwal 48, 1012 CX Amsterdam, The Netherlands
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