Scaling algebras and pointlike fields: A nonperturbative approach to renormalization

We present a method of short-distance analysis in quantum field theory that does not require choosing a renormalization prescription a priori. We set out from a local net of algebras with associated pointlike quantum fields. The net has a naturally defined scaling limit in the sense of Buchholz and Verch; we investigate the effect of this limit on the pointlike fields. Both for the fields and their operator product expansions, a well-defined limit procedure can be established. This can always be interpreted in the usual sense of multiplicative renormalization, where the renormalization factors are determined by our analysis. We also consider the limits of symmetry actions. In particular, for suitable limit states, the group of scaling transformations induces a dilation symmetry in the limit theory.Comment: minor changes and clarifications; as to appear in Commun. Math. Phys.; 37 page

Friday night, Saturday night Youth cultural identity in the post-industrial city

SIGLEAvailable from British Library Document Supply Centre- DSC:95/29346 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Towards a Smart Community Centre: SEIDET Digital Village

Part 1: Society, Social Responsibility, Ethics and ICTInternational audienceSouth African communities are constantly being developed through new ICT projects which are initiated by individuals, government and private organisations. The problem with these developments is that they are implemented in isolation. This isolation causes limited sharing of resources, duplication, poor-governance of the resources and in worse-case scenarios, failure of project initiatives. This paper proposes a model that could be used to address these problems by focusing on the SEIDET community centre using it as an example. The model follows a descriptive analysis of ICT related work spanning over two decades performed within the SEIDET context, including the ongoing SEIDET Digital Village. The benefits of the proposed smart community centre model include community and rural development through sharing of scarce ICT resources. It could further provide support for entrepreneurs through training interventions, action-based research for policy development as well as spawn local innovation and free-sharing of resources and services

The paradigm of the modern city: SMART and SENSEable Cities for smart, inclusive and sustainable growth

The concept of the “smart city” has recently been introduced as a strategic tool to encompass the modern functioning processes of urban development and, in particular, to highlight the importance of Information and Communication Technologies (ICTs) for developing competitive and sustainable of a city. The present paper aims to shed light on the often still elusive definition of the concept of the “smart city” and tries to define a new reading of the “smartness” of a city that includes the size of the equity as a parameter to (re)definition of the International and European rankings of smart cities. In detail, the classifications made ​​by Boyd Cohen’s of Top Ten Global Smart Cities and Top Ten Smartest European Cities based on the metric of “Smart Cities Wheel” of Vienna Polytechnic will be reinterpreted according to the values ​​of the Equity City Index, compiled by the UN-Habitat 2012. Finally, comparing the two dimensions (smartness + equity) will be presented different possible models of Smart-Equitable Cities and policies