Collaborative tagging has been quickly gaining ground because of its ability to recruit the activity of web users into effectively organizing and sharing vast amounts of information. Here we collect data from a popular system and investigate the statistical properties of tag co-occurrence. We introduce a stochastic model of user behavior embodying two main aspects of collaborative tagging: (i) ...

The revolution will not be televised. But The Coming Insurrection (2009) was. Originally published in France in 2007, the small booklet, written by the anonymous Comité Invisible (Invisible Committee), was denounced as a manual for terrorism by the French government and became a key piece of evidence against nine activists arrested in a raid in the small commune of Tarnac who were allegedly pla...

Design principles are semiotic by nature. To design means to structure systems of signs in such a way as to make possible the achievement of human goals: communication (as a form of social interaction), engineering (as a form of applied technical rationality), business (as a form of shared efficiency), architecture, art, education, etcetera. Design comes about in an environment traditionally ca...

Already in the 1950s some were proclaiming the twentieth century the " psychoanalytic century. " As it happened, they were right. But to which psychoanalysis were they referring? For clearly there has never been one psychoanalysis, as scholars of various persuasions have noted. Even during Freud's life as a psychoanalyst, from 1896-1939, we find a multitude of possible psychoanalyses at work. F...

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