Infrastructure Engineering - Theses

Permanent URI for this collection

http://hdl.handle.net/11343/348

Filters

2009 - 2010 2
1 1
Reset filters

Settings
Statistics
Citations
Start date: 1980 × Subject: betweenness centrality ×

Search Results

Now showing 1 - 2 of 2
  • Item
    Thumbnail Image
    Characterization of the urban street network and its emerged phenomena
    Kazerani, Aisan ( 2010)
    An urban environment can be abstracted in form of a street network in order to be further analysed structurally. The urban street network can be represented in various ways by taking different principles and constraints into account. Therefore the aim of this work is to investigate human behaviour and communication in emerged urban phenomena, namely traffic flow and wayfinding, by structural characterization of an appropriate representation of an urban street network and modifying the conventional methods. In order to characterize the depicted urban street network, centrality measure and specifically betweenness centrality is utilized. This analysis is then implemented to characterize the studied urban phenomena with respect to their structural, temporal and dynamic properties. In case of studying only the structural properties of the phenomena such as route description or self localization the conventional betweenness centrality is performed. But in case of studying the dynamic and temporal properties of a phenomenon such as traffic flow a modified version of betweenness centrality is proposed which considers dynamic and temporal aspects of human travel behaviour. Experiments are designed to test the implementation of the suggested methods in the studied urban phenomena. The results of experiments demonstrate the efficiency of the proposed model in characterization of the studied urban phenomena in this thesis and then mention some of the problems and potential areas for future works.
  • Item
    Thumbnail Image
    Indoor centrality
    Santosa, Sigit ( 2009)
    Indoor environments are different from other environments. There are some characteristics which are unique such as dimensionality and spatial structure. Apart from indoor centrality, research has been done to reveal the properties of centrality particularly in street networks, social networks, and biological networks. In addition, there are some indoor representations which have already been developed for different purposes such as wayfinding, behavioural science, and sociology.Therefore, this research is undertaken to investigate models of representation and apply the measures of centrality to reveal the properties of indoor environments. Different representations and betweenness centrality measures have been tested in a subset of indoor environments. The models and measures have been proven capable of revealing the properties of indoor environments such as centrality, prominency, and complexity. In addition, this research has revealed the strengths and weaknesses of both models and measures. The results of different measurements of betweenness centrality based on different representations are combined. Here, graph representations which depict space and link centralities in topological graphs is used to construct a structural hierarchy which is able to support wayfinding in indoor environments. This research contributes to our understanding of indoor centrality through the formalization of the representations and measures.