Ports in multi-level maritime networks: evidence from the Atlantic (1996-2006)
Figure 5: Clusters of ports within the Atlantic network
Download 2.18 Mb.
|
- Navigate this page:
- Figure 6: Clusters of ports within the Atlantic network , 2006
Figure 5: Clusters of ports within the Atlantic network, 1996 
Source: realized by authors based on LMIU data and TULIP software Figure 6: Clusters of ports within the Atlantic network, 2006 
Source: realized by authors based on LMIU data and TULIP software 1 Corresponding author 2 We used TULIP software created by the Laboratoire Bordelais de Recherche en Informatique (LABRI), and which was initially created for biology. It is today extensively used for social network analysis and in transport studies notably on air transport networks, intra and inter-urban commuter flows, and multinational corporations’ networks in the SPANGEO project (http://s4.csregistry.org/SpanGeo). The TULIP software is free, open source and available at: http://tulip.labri.fr/ 3 Number of ports (vertices) directly connected to a given port through inbound and outbound direct maritime connections (edges). This paper does not measure a deeper degree (e.g. level 2, 3, or more) but this is used extensively in sociology and communication science for analyzing diffusion processes (Monge and Contractor, 2003). In the case of maritime transport, extending the measure of degree would highlight possible transfer steps in the vicinity of ports. 4 Sum of all possible shortest paths of the graph passing through a given port. This measure can reflect a “potential maritime accessibility” and can be interpreted as a level of intermediacy - or in-betweenness - condensing multiple insertions of ports within the networks of ocean carriers and their ability connecting various scales from the local to the global (Fleming and Hayuth, 1994). 5 We measure the observed connectivity by dividing the number of edges by the number of ports, and compare it with the optimal connectivity (i.e. assuming that all ports should be connected to each other). The Atlantic network is based on 307 ports (1,821 links) in 1996 and 351 ports (3,609 links) in 2006. 6 The methodology is applied on all direct and indirect weighted edges (traffic in TEUs) as the clustering metric. Directory: file -> index -> docid docid -> Acting on a visual world: the role of perception in multimodal hci frédéric Wolff, Antonella De Angeli, Laurent Romary docid -> I. Leonard1, A. Alfalou,1 and C. Brosseau docid -> Morphological annotation of Korean with Directly Maintainable Resources Ivan Berlocher1, Hyun-gue Huh2, Eric Laporte2, Jee-sun Nam3 docid -> Laurent pedesseau1,*, jean-marc jancu1, alain rolland1, emmanuelle deleporte2, claudine katan3, and jacky even1 docid -> Social stress models in depression research : what do they tell us ? Francis Chaouloff docid -> Electrochemical reduction prior to electro-fenton oxidation of azo dyes. Impact of the pre-treatment on biodegradability docid -> Islam in Inter-War Europe docid -> Chapter 6 Developing Liner Service Networks in Container Shipping docid -> Title: Small-mammal assemblage response to deforestation and afforestation in central China. Running title: Small mammals and forest management in China docid -> A tale of Asia’s world ports: The Spatial Evolution in Global Hub Port Cities Download 2.18 Mb. Share with your friends:
|