Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 10 of 10 for “"Network vulnerability"”.
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Game Theory Approach to Transportation Network Vulnerability Measurement
<p>The vulnerability of a transportation network is strongly correlated with the ability of the network to withstand shocks and disruptions. A robust network with strategic redundancy allows for the redistribution or reassignment of traffic without unduly compromising system performance. As such, …
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Critical Node Identifcation for accessing network vulnerability, a necessary consideration
… of critical nodes is crucial for assessing network vulnerability and survivability. This thesis presents two new approaches for the identification of critical nodes in a network with the first being an intuition based approach and the second being build on a mathematical framework. The first …
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A Simulation-Based Approach to the Characterisation of Urban Traffic Network Vulnerability
… obtain a better understanding of urban traffic network vulnerability. A methodological framework is presented, forming the basis for investigating critical dimensions affecting vulnerability. The focus is on the Central Business District (CBD) network type. The three dimensions; Centrality, …
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Quantifying Computer Network Security
<p>Simplifying network security data to the point that it is readily accessible and usable by a wider audience is increasingly becoming important, as networks become larger and security conditions and threats become more dynamic and complex, requiring a broader and more varied security staff …
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Characterizing the Dynamics of Vulnerability for Roadway Infrastructure Systems
… years have motivated researchers to study the vulnerability of infrastructure systems to disastrous events. A number of existing studies address roadway networks where researchers have characterized the robustness and vulnerability of roadways to earthquakes, floods, and targeted attacks. …
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Multi-modal public transport modelling under traffic disruptions
… framework for dynamic public transport (PT) networks, addressing the limitations of single-mode analysis in disruption impact assessment. Our approach extends the traditional Gravity Models-based OD estimation method by incorporating entropy-weighted calibration to fuse traffic …
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Algorithms for Distributionally Risk-Receptive and Robust Stochastic Integer Programs and Interdiction Problems
… first direction, we study DRR and DRO two-stage network interdiction problems. For solving them, we propose a new class of cutting planes and develop exact and approximation algorithms with finite convergence results. In the second direction, we extend these frameworks to multi-stage stochastic …
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Geometric Hitting Sets and Their Variants
… problems that arise</p><p>in robotics and sensor networks. In particular we present efficient</p><p>algorithms for the hitting-set problem and the budgeted hitting-set problem.</p><p>Given a set of objects and a collection of subsets of the objects,</p><p>called ranges, the hitting-set problem …
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Scalable attack modelling in support of security information and event management
… on single devices can be performed using vulnerability assessment tools, modelling of more intricate attacks, which incorporate multiple steps on different machines, requires more advanced techniques. Attack graphs are a promising technique, however they face a number of challenges. An …
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Understanding and modeling food flow networks across spatial scales
… these virtual resource transfers. What are the network properties of food flows within a country? How do food flows vary with spatial scale? How can we model food flows in locations without empirical information? This dissertation seeks to address these three overarching questions. First, this …