Application of fractional delay filters to tune the centre frequency location of single-band sigma-delta modulators

This paper presents a novel technique for the design of narrow-band sigma-delta modulators with an embedded tunable centre frequency mechanism. This method demonstrates that the use of sum filters combined with a fractional delayer provide the flexibility of tuning the noise shaping band for any desired variable centre frequency input signal.

The Location of Cultural Authenticity: Identifying the Real and the Fake in Urban Guizhou

This article examines notions of cultural identity and authenticity and how these notions are articulated in the small city of Kaili in Guizhou Province, an ethnically diverse region. Despite its urban status, Kaili has been branded by the local government as a yuanshengtai tourist destination. This Chinese term literally translates as “original ecology” but is used in ordinary conversation to denote a cultural authenticity in which people exist in quiet harmony with nature. Promotional literature uses the term to tout the ethnic cultural practices that mainly occur in the villages of Kaili’s municipal periphery. In contrast, many local urban inhabitants—although amenable to the promotion of Kaili as a tourist destination—have rejected the notion that the city itself could be considered culturally authentic, and proudly declare themselves “fake” ethnic minorities, as against the “genuine” ethnic people of surrounding villages. These small-city inhabitants have also defined themselves against big-city visitors by attributing to the visitors a naïve fascination with cultural authenticity, while themselves remaining aloof from such practices. The cultural authenticity discourse in Kaili has thus facilitated a reordering of social and spatial hierarchies, as blasé small-city residents define themselves against both culturally authentic rural people and authenticity-seeking big-city tourists. In analyzing this, the article draws out the broader implications regarding PRC notions of ethnicity, cultural practices, heritage, and identity.

Moment of stasis: the successful failure of a constitution for Europe

The 2005 French and Dutch negative votes on the Constitution open up a space of conceptualisation, not only of Europe's relation to its demos, but significantly to its failures. Through a critical analysis of mainly Niklas Luhmann's systems theory, the article proposes taking a distance from traditional constitutional dogmatics that are no longer capable of dealing with the paradox of contemporary society, and more specifically with the eventual resurgence of the European project as one of absence and stasis: the two terms are used to explain the need, on the one hand, to maintain the 'absent community' of Europe, and, on the other, to start realising that any conceptualisation of the European project will now have to take place in that space of instability and contingency revealed by the constitutional failure. The relation between law and politics, the location of a constitution, the distinction between social and normative legitimacy, the connection between European identity and demos, and the concept of continuity between constitutional text and context are revisited in an attempt to trace the constitutional failure as the constitutional moment par excellence.

"One of our hosts in another country": Challenges of data geolocation in cloud storage

Physical location of data in cloud storage is an increasingly urgent problem. In a short time, it has evolved from the concern of a few regulated businesses to an important consideration for many cloud storage users. One of the characteristics of cloud storage is fluid transfer of data both within and among the data centres of a cloud provider. However, this has weakened the guarantees with respect to control over data replicas, protection of data in transit and physical location of data. This paper addresses the lack of reliable solutions for data placement control in cloud storage systems. We analyse the currently available solutions and identify their shortcomings. Furthermore, we describe a high-level architecture for a trusted, geolocation-based mechanism for data placement control in distributed cloud storage systems, which are the basis of an on-going work to define the detailed protocol and a prototype of such a solution. This mechanism aims to provide granular control over the capabilities of tenants to access data placed on geographically dispersed storage units comprising the cloud storage.

LUTI models, freight transport and freight facility location

The subject of this book is the new scientific research in the field of modelling the interaction between land use and transport (LUTI modelling). Transport and the location of activities in space have been important themes of study in engineering, social sciences and urban and regional planning

Housing market trend and rail transport investments in the city of Naples

Rail transport investments can influence housing market trends, as demonstrated in the literature. However many empirical researches highlight that different results can derive from different urban context applications and that each case should be threaten separately. It is for this reason that this paper is focused on the single case of the city of Naples, where many rail transport investments have been carried out in the last decades. The aim of this study is to give an interpretation of the housing values changes due to the opening of new metro stations. This study applies GIS tools in order to show the spatial distribution and the intensity of rail impacts in different areas of the urban system from 1994 to 2004. This study shows that the extent of the impacts varies from place to place and the effects intensity requires the presence of several complementary factors such as central location of the new stations and the presence of urban planning policies in the transit corridors. This again testifies how housing market is strictly related to the infrastructures investments planning and urban design.