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Increasing amounts of information processing capacity are embedded in the environment around us. The informational landscape is both a repository of data and also increasingly communicates and processes information. No longer confined to desk tops, computers have become both mobile and also disassembled. Many everyday objects now embed computer processing power, while others are activated by passing sensors, transponders and processors. The distributed processing in the world around us is often claimed to be a pervasive or ubiquitous computing environment: a world of ambient intelligence, happening around us on the periphery of our awareness, where our environment is not a passive backdrop but an active agent in organizing daily lives. The spaces around us are now being continually forged and reforged in informational and communicative processes. It is a world where we not only think of cities but cities think of us, where the environment reflexively monitors our behaviour. This paper suggests that we need to unpack the embedded politics of this process. It outlines the three key emerging dynamics in terms of environments that learn and possess anticipation and memory, the efficacy of technological mythologies and the politics of visibility. To examine the assumptions and implications behind this the paper explores three contrasting forms of ‘sentient’ urban environments. The first addresses market-led visions of customized consumer worlds. The second explores military plans for profiling and targeting. Finally, the third looks at artistic endeavours to re-enchant and contest the urban informational landscape of urban sentience. Each, we suggest, shows a powerful dynamic of the environment tracking, predicting and recalling usage.

The amount of noise in urban settings is steadily on the rise, creating a potential health hazard and causing a general nuisance. In major European cities, noise levels are so high that the majority of urban parks can no longer truly serve as recreational environments, a problem the World Health Organization and the European Union are attempting to address. This study explores various strategies that promote the sustainable development of urban soundscapes at locations meant for rest, recreation, and social interaction. Further, we look at how people are affected by the combined effects of traffic and nature sounds in parks and other outdoor settings. To this end, we adopted a new track — the use of interdisciplinary methodology — that brings together architectural analysis, artistic experiments, and psychoacoustic methodology to evaluate the aesthetic, emotional, perceptual, and spatial effects of noise on subjects spending time in public open-air spaces. We conducted a large-scale case study at a city park to explore whether subjects were affected by purposely distributed sounds and, if so, how. The working hypothesis was that it is possible to cancel out or mute traffic noise by affecting individuals' aural perceptions using a process known as informational masking. Our long-term objective is to create a scientific foundation for action plans, both preemptive and troubleshooting, targeting noise reduction in parks and similar public spaces that are meant to provide a relaxing environment.

The notion of a hidden city of social reproduction, suggests that the uneven relations and material practices of social reproduction are respectively hidden and targeted by a neo-liberal urban agenda. A discussion of the public-private Grand Central Partnership in New York City, reveals some of the ways that this agenda is pursued through preservation, and addresses how particular social actors and their activities are removed from view in the interests of ensuring "orderly," "clean," and "safe" public space.

Defensible space is a model for residential environments which inhibits crime by creating the physical expression of a social fabric that defends itself. All the different elements which combine to make a defensible space have a common goal—an environment in which latent territoriality and sense of community in the inhabitants can be translated into responsibility for ensuring a safe, productive, and well-maintained living space. The potential criminal perceives such a space as controlled by its residents, leaving him an intruder easily recognized and dealt with. On the one hand this is target hardening—the traditional aim of security design as provided by locksmiths. But it must also be seen in another light. In middle-class neighborhoods, the responsibility for maintaining security has largely been relegated to the police. Upper-income neighborhoods—particularly those including high-rise apartment buildings—have supplemented police with doormen, a luxury not possible in other neighborhoods. There is serious self-deception in this posture. When people begin to protect themselves as individuals and not as a community, the battle against crime is effectively lost. The indifferent crowd witnessing a violent crime is by now an American cliché. The move of middle- and upper-class population into protective high-rises and other structures of isolation—as well guarded and as carefully differentiated from the surrounding human landscape as a military post—is just as clearly a retreat into indifference. The form of buildings and their arrangement can either discourage or encourage people to take an active part in policing while they go about their daily business. “Policing” is not intended to evoke a paranoid vision but refers to the oldest concept in the Western political tradition: the responsibility of each citizen to ensure the functioning of the polis. “Defensible space” is a surrogate term for the range of mechanisms—real and symbolic barriers, strongly defined areas of influence, and improved opportunities for surveillance—that combine to bring an environment under the control of its residents. A defensible space is a living residential environment which can be employed by inhabitants for the enhancement of their lives, while providing security for their families, neighbors, and friends. The public areas of a multi-family residential environment devoid of defensible space can make the act of going from street to apartment equivalent to running the gauntlet. The fear and uncertainty generated by living in such an environment can slowly eat away and eventually destroy the security and sanctity of the apartment unit itself. On the other hand, by grouping dwelling units to reinforce associations of mutual benefit; by delineating paths of movement; by defining areas of activity for particular users through their juxtaposition with internal living areas; and by providing for natural opportunities for visual surveillance, architects can create a clear understanding of the function of a space, and who its users are and ought to be. This, in turn, can lead residents of all income levels to adopt extremely potent territorial attitudes and policing measures, which act as strong deterrents to potential criminals.