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 9 of 9 for “"Aggregation model"”.
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Study of a 2 dimensional aggregation model with non-linear adaptations
… to the animals’ turning rate in a 2-dimensional model of aggregation. The model in question was proposed by Fetecau and implements a dependence on an individual’s relation to neighbours’ position and the direction in which they are moving. By utilizing a turning rate formula similar to one …
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A nonlinear and nonlocal model for animal aggregation
An aggregation model is a kind of model used to show the dynamics of the distribution of the population of organisms. Mathematically, we can use a partial differential equation to model the density of an organism at different times and locations. In this paper, we are going to look at a …
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On matrix-free pseudo-arclength continuation methods applied to a nonlocal partial differential equation in 1+1D with pseudo-spectral time-stepping
In this thesis we examine a recent animal aggregation model which describes the evolution of two populations of animals moving on a 1-dimensional spatial domain differing only by the direction they travel. The equations describing the evolution of the populations is a hyperbolic, nonlocal partial …
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Physico-chemical properties of polypropylene glycols
… that phase separation is a consequence of PPG aggregation (droplets); the aggregates grow in size, as the temperature is raised further. It is postulated that phase separation occurs via nucleation and growth, which is corroborated by model fitting the calorimetric data using a mass action …
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Learning with Incidental Supervision
… toolbox of choice for exploiting it to study and model numerous natural and social phenomena. These learning techniques typically require substantial amounts of training data in order to induce good solutions. However, generating annotation often places a significant burden on human experts, and …
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Dueling markets : capitalizing on the non-institutional and institutional asset arbitrage
… alongside the feasibility of an investment model to capitalize on the aggregation of subinstitutional assets into portfolios attractive to institutional investment. The U.S. market was analyzed both quantitatively and qualitatively to determine the viability of the perceived arbitrage, the …
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Photophysical Studies of Beta Phase Formation in Poly(9,9-di-n-alkylfluorenes)
… The beta phase formation in PF8, PF9 and PF10 is modelled using a previously reported aggregation model, with limited success. A mechanism for the beta phase formation is proposed, where the interactions between the alkyl side chains provide the chemical energy to overcome the activation energy …
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MODELING REORGANIZATION OF PCF10-INDUCED COMPLEX STRUCTURES IN ENTEROCOCCUS FAECALIS UNDER ERYTHROMYCIN TREATMENT
… faecalis OG1RF(pCF10) is shown to undertake a remodeling process where aggregated regions of the complex structures increase, and the total bacterial population doubles. In this dissertation, we present a series of models developed to capture the multi-scale effects driving this biofilm …
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The effects of various wage rates on farm organization and structure in Southwest Virginia: a study minimizing average outlay when obtaining specified income levels
… this area was determined. A linear programming model with added average outlay as a minimization criterion was constructed to determine the optimum resource use and enterprise combinations for' three representative farms to achieve operator labor incomes of $3,500, $5,000, $7,000, respectively. …