A Bio-Inspired Two-Layer Mixed-Signal Flexible Programmable Chip for Early Vision

A bio-inspired model for an analog programmable array processor (APAP), based on studies on the vertebrate retina, has permitted the realization of complex programmable spatio-temporal dynamics in VLSI. This model mimics the way in which images are processed in the visual pathway, what renders a feasible alternative for the implementation of early vision tasks in standard technologies. A prototype chip has been designed and fabricated in 0.5 μm CMOS. It renders a computing power per silicon area and power consumption that is amongst the highest reported for a single chip. The details of the bio-inspired network model, the analog building block design challenges and trade-offs and some functional tests results are presented in this paper.Office of Naval Research (USA) N-000140210884European Commission IST-1999-19007Ministerio de Ciencia y Tecnología TIC1999-082

Foreigners, Immigrants, Host Cities: The Policies of Multi-Ethnicity in Rome. Reading Governance in a Local Context

This paper reviews the experience of Rome in dealing with the challenges posed by a multi-ethnic society. A central feature of the local political strategy is the “Pact of Integration”. The adoption of the Pact proposes governance as a model of participation including many actors, namely immigrant communities, in the comprehensive development of the quality of life of the city and not only in the decision-making mechanisms of local powers. The Pact represents a contract by which the social and political acceptance of foreigners in the local environment is perceived as benefiting both the foreign and autochthonous communities. On one hand, immigrants are incorporated into their local environment, following from the recognition of foreigners’ rights and needs for solidarity. On the other hand, foreigners are considered agents of local development insofar as they are both consumers and producers. The multiethnic society can then be a source of development. The preface by Franca Eckert Coen provides an overview of the city’s experiences in managing religious differences.Immigration, Governance, Multi-ethnicity

GLC actors, artificial chemical connectomes, topological issues and knots

Based on graphic lambda calculus, we propose a program for a new model of asynchronous distributed computing, inspired from Hewitt Actor Model, as well as several investigation paths, concerning how one may graft lambda calculus and knot diagrammatics

On some uses and abuses of topology in the social analysis of technology (Or the problem with smart meters)

This article examines different ways in which topological ideas can be used to analyse technology in social terms, arguing that we must become more discerning and demanding as to the limits and possibilities of topological analysis than used to be necessary. Topological framings of technology and society are increasingly widespread, and in this context, it becomes necessary to consider topology not just as a theory to be adopted, but equally as a device that is deployed in social life in a variety of ways. Digital technologies require special attention in this regard: on the one hand, these technologies have made it possible for a topological imagination of technology and society to become more widely adopted; on the other hand, they have also enabled a weak form of topological imagination to proliferate, one that leaves in place old, deterministic ideas about technology as a principal driver of social change. Turning to an empirical case, that of smart electricity metering, the article investigates how topological approaches enable both limited and rigorous ‘expansions of the frame’ on technology. In some cases, topology is used to imagine technology as a dynamic, heterogeneous arrangement, but ‘the primacy of technology’ is maintained. In other cases a topological approach is used to bring into view much more complex relations between technological and societal change. The article ends with an exploration of the topological devices that are today deployed to render relations between technological and social change more complexly, such as the online visualisation tool of tag clouding. I propose that such a topological device enables an empirical mode of critique: here, topology does not just help to make the point of the mutual entanglement of the social and the technical, but helps to dramatize the contingent, dynamic and non-coherent unfolding of issues

Benefits of and barriers to involving users in medical device technology development and evaluation

Objectives: This study investigated the benefits of, and barriers to user involvement in medical device technology development and evaluation. Methods: A structured review of published literature in peer-reviewed journals. Results: This review revealed that the main benefits of user involvement were an increased access to user needs, experiences and ideas; improvements in medical device designs and user interfaces; and an increase in the functionality, usability and quality of the devices. On the other hand, resource issues, particularly those of time and money were found the key impediments to involving users in the development and evaluation of medical device technologies. This study has categorised both the benefits and barriers to user involvement also. Conclusions: The involvement of users in MDTD&E requires resources, which are limited; however, it is essential from both users and manufacturers perspectives

Challenges and opportunities of context-aware information access

Ubiquitous computing environments embedding a wide range of pervasive computing technologies provide a challenging and exciting new domain for information access. Individuals working in these environments are increasingly permanently connected to rich information resources. An appealing opportunity of these environments is the potential to deliver useful information to individuals either from their previous information experiences or external sources. This information should enrich their life experiences or make them more effective in their endeavours. Information access in ubiquitous computing environments can be made "context-aware" by exploiting the wide range context data available describing the environment, the searcher and the information itself. Realizing such a vision of reliable, timely and appropriate identification and delivery of information in this way poses numerous challenges. A central theme in achieving context-aware information access is the combination of information retrieval with multiple dimensions of available context data. Potential context data sources, include the user's current task, inputs from environmental and biometric sensors, associated with the user's current context, previous contexts, and document context, which can be exploited using a variety of technologies to create new and exciting possibilities for information access