1,721,003 research outputs found
Analisi di sistemi territoriali attraverso il paradigma delle reti complesse: il caso del pendolarismo in Sardegna e Sicilia
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Social and instrumental antecedents of clique survival in the port industry network: A longitudinal perspective
No full textResilience and Vulnerability of Spatial Economic Networks
No full textThis Special Issue (SI) brings ‘under one roof’ the work of scholars dedicated to the resilience and vulnerability of systems. Three main strands knit the different contributions together, and constitute the rationale for their selection in this volume: a) resilience/vulnerability; b) dynamic (complex) networks; and c) space-economy. In particular this SI provides a synthetic perspective on the various interpretations of resilience and vulnerability in spatial economic networks, given the different objectives and landscapes, with special attention to the understanding of the effects generated by disruptions of spatial economic systems. Consequently, the selection of articles in this SI offers novel theoretical and empirical insights into the complex dynamics of economic and spatial networks, using new, systematic data sources and employing cutting-edge network analysis and spatial econometric techniques. Within this framework, the chosen contributions analyse transport networks and economic networks – at various spatial scales – with the view to identifying the critical factors that lead to resilient and vulnerable outcomes
Guest editorial: Resilience of Networks
No full textIn recent years, the complex dynamics of local as well as global transport networks have attracted ever increasing attention due to reports of their multiple failures and deleterious impacts, which have often occurred during disruptive events.
Not only have hazards recently increased in complexity and intensity but their impacts are also no longer confined within the local boundaries of specific transport operations, and instead more widely affect global connections and accessibility.
The above mentioned merge of characteristics within transport systems has compelled scholars and practitioners to place great emphasis on exploring transport systems from different perspectives of resilience and vulnerability. Research findings from the analyses on the various dimensions of transport resilience and vulnerability now allow us to better understand the similarities and differences in systems, but more importantly, they have opened the way for researchers to relate concepts of resilience and vulnerability with those of interdependency and connectivity/accessibility.
From this stand point, it seems necessary to reflect on the relevance of transport network resilience and vulnerability by exploring definitions, interpretations and applications from different methodological/empirical angles and perspectives. This is the platform which has paved the way to this Special Issue (SI)
Nuraghes and landscape planning: coupling viewshed with complex network analysis
No full textRecent approaches in landscape planning have prompted interest in the relationships among cultural goods, human settlements, and the environment. In Europe and Italy, scholars and practitioners have used landscape planning tools for the analysis and management of historical landscapes that include elements such as the sense of belonging of local societies to cultural heritage sites. In this paper the authors present a study of prehistoric settlements focusing on the Nuragic system developed on the Pranemuru plain in Sardinia during the Bronze Age. We investigate the hypothesis that the spatial patterns of the Nuraghes obey rules of inter-visibility control over the surrounding territory. We check the inter-visibility thesis by means of a quantitative approach, which integrates GIS based viewshed and complex network analysis. Nuragic inter-visibility is studied through network modelling and assessed with respect to a topological analysis. Results show a hierarchical organisation and not a random structure in the inter-visibility network: hence, consistent rules influenced the construction of Nuragic settlements on the Pranemuru plain. We conclude speculating that inter-visibility cannot be considered the sole factor that influenced the placement of Nuragic towers. The inter-visibility among these towers is plausibly connected with the presence of other human and natural resources
Measuring the scope of inter-firm agreements in the container shipping industry: an empirical assessment
No full textIn container shipping industry inter-firm agreements are becoming progressively popular as ship-owners share their slot capacity with commercial partners in order to have fully loaded container ships and reduce financial risk. This manuscript focuses on the co-operative agreements among shipping firms, i.e. vessel sharing and slot charter agreements within consortia and strategic alliances. Through a quantitative approach based on network and OLS regression analysis, we scrutinise the propensity to co-operate, the geographic extent and leveraging effect generated by this commercial practise on the container-shipping industry. Results show that carriers, usually regarded as independent, are instead fairly co-operative, especially when involved in trade lanes originating from the Far East. Finally, we show that carriers increase their commercial objectives by leveraging the operated fleet capacity. We conclude with some implications for managers and practitioners as well as a discussion on limitations and future extensions of this study
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