In contemporary cities, closure and individualism predominate at the expense of ‘mixing’ and inclusion. By structuring the territories around the principles of speed and globalization, the Net has generated ‘weak links’ of social interaction that are reflected in a public space devoid of identity, used quickly and in solitude, dominated by the fear of the difference and by indifference. In opposition to these dynamics, the importance of collaboration emerges, the central value of an open city in which technology and society become resources to reconcile global and local, individual and community. In this direction, at the scale of public space, the collaborative actions of urban events and the bottom-up practices work on the immaterial component of the project: co-design processes guide the interventions of citizens, collectives and associations in the rediscovery of identity values, cultural meanings and emotions associated with places. The public space becomes a place of interaction and meeting again, experiencing a new culture of living through ‘fixed-time architecture’ which, while meeting the needs of the moment, imagine change. Ephemeral and temporary re-signify ordinary landscapes through collective creativity and direct action on places and, if on the one hand they express the acceleration of our era, on the other they become forms and languages of a project that, in an ecological vision, fits with the rhythms of nature, where everything changes and evolves to contribute to life.
 
 
 
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