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.
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Showing 1 to 16 of 16 for “"Contact network"”.
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Agent-based and contact network modeling applications for Escherichia coli transmission in commercial feedlot settings
… of STEC in commercial feedlot settings. The contact networks of feedlot cattle both within and between pens were characterized and an agent-based model was created to examine the influence of direct and indirect transmission routes on the pen-level prevalence of E. coli colonization. …
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Spatial spread of farm animal diseases
… to include all cattle by the beginning of 2001. Contact networks have proved valuable in studying the epidemiology of diseases in man, such as human immunodeficiency virus; the availability of CTS cattle movement data has enabled contact network analysis to be applied to diseases of farm …
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Modeling, Analysis and Comparison of Large Scale Social Contact Networks on Epidemic Studies
Social contact networks represent proximity relationships between individual agents. Such networks are useful in diverse applications, including epidemiology, wireless networking and urban resilience. The vertices of a social contact network represent individual agents (e.g. people). Time varying …
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Task-specific summarization of networks: Optimization and Learning
Networks (also known as graphs) are everywhere. People-contact networks, social networks, email communication networks, internet networks (among others) are examples of graphs in our daily life. The increasing size of these networks makes it harder to understand them. Instead, summarizing these …
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Simulating the Spread of Malaria: A Cellular Automaton Based Mathematical Model & A Prototype Software Implementation
… spread of infectious diseases; it uses social contact network from TRANSIMS (A Transport Analysis and Simulation System). Simulation results from the prototype implementation showed qualitatively correct results for vector densities, diffusion and epidemiological curves.
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Development of Person-Person Network and Interacting PTTS in EpiSimdemics
… behavior during disease epidemic [1][2]. Social contact networks and epidemics co-evolve [1][2]. The spread of a disease influences people's behavior which in turn changes their social contact network, thereby altering the disease spread itself. As a result, there is a need for modeling the …
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A Distributed Approach to EpiFast using Apache Spark
… of the stochastic disease propagation in a contact network. The original EpiFast implementation is based on a master-slave computation model with a focus on distributed memory using message-passing-interface (MPI). However, it suffers from few shortcomings with respect to scale of networks …
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Dynamics of 1d granular column
… a half sine wave pulse to supporting floor. Contact interactions obey the Walton-Braun soft-sphere model in which the loading (unloading) path is governing by linear springs of stiffness K1, thereby producing col lisional energy loss through a constant restitution coefficient e. Over a 'short …
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Emerging Variants and Fading Immunity: Analyzing the Impact in Epidemic Modeling
… considering diverse population structures in the contact network where different age groups have different levels of immunity strength. An evolutionary algorithm was used to generate and evolve personal contact networks. We analyzed the epidemic dynamics within these networks, focusing on how …
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Estimating network structure and propagation dynamics for an infectious disease : towards effective vaccine allocation
… requires good understanding of the underlying contact network and of the propagation dynamics. In this thesis we develop a parameter estimation method that learns the network structure, among a family of graphs, and disease dynamics from the recorded infection curve, assuming that the disease …
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The two-way street between discrete and continuum models of particle systems
… In such a suspension, the microstructure of the contact network between particles gives rise to macroscopic electrical conductivity. Developing this model consists of two phases: 1) developing a discrete model for the conductivity of a simplified network, and 2) embedding the discrete model into …
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Evolving Weighted Networks to Simulate Epidemics and Lockdowns
… algorithm is used to evolve weighted personal contact networks that represent physical contact between individuals, and thus possible paths of infection during an epidemic. The evolutionary algorithm evolves a list of edge-editing operations applied to an initial graph. Two initial graphs are …
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Social network support for data delivery infrastructures
Network infrastructures often need to stage content so that it is accessible to consumers. The standard solution, deploying the content on a centralised server, can be inadequate in several situations. Our thesis is that information encoded in social networks can be used to tailor content staging …
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Three Essays on Social Networks in Labor Markets
… I develop a theoretical model where labor market networks provide labor market information with less noise than information obtained in the formal market. This model predicts lower initial wages and greater wage growth after migration for migrants without contacts. I then use data from the …
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Optimizing and Understanding Network Structure for Diffusion
Given a population contact network and electronic medical records of patients, how to distribute vaccines to individuals to effectively control a flu epidemic? Similarly, given the Twitter following network and tweets, how to choose the best communities/groups to stop rumors from spreading? How to …
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Influence of some particle characteristics on the small strain response of granular materials
… represented by a shear wave velocity through the contact network, Vcontact, which is a function of particle characteristics. Particle size and particle shape create both macro effects (e.g. effect of void ratio) and micro effects (at the contact level) on the small strain response of granular …