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 13 of 13 for “"Bogdanov"”.
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Periodic Delay Effects on Cutting Tool Dynamics
… these bifurcations are well explained by the Bogdanov-Takens bifurcations when the ration between the frequencies of the periodic solution of the Unperturbed system (Hopf bifurcation) and the external periodic perturbation is 1:2. Our anaylsis is based on center manifold reduction theory.
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Formas hipernormales y bifurcaciones en sistemas planos y tridimensionales
… orden infinito para las bifurcaciones de Takens-Bogdanov y HOPF-cero.En los dos últimos capítulos se analiza un oscilador electrónico, estudiando las distintas degeneraciones lineales que aparecen. También abordamos el análisis teórico de las degeneraciones no lineales de la bifurcación …
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Hopf bifurcations in magnetoconvection in the presence of sidewalls
… In Case II we show that there are also secondary Bogdanov-Takens bifurcation points. Using this, we show there are additional secondary and tertiary bifurcations of periodic solutions and invariant tori, and also argue that generically, there exist transversal homoclinic and heteroclinc points, …
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Bifurcation Analysis of Endogenous Growth Models
… Doubling). In addition some codimension-2 (Bogdanov-Takens and Generalized Hopf) bifurcations are detected in the modified Jones model. While the aforementioned are all local bifurcations, the Uzawa-Lucas model also shows the presence of global bifurcation.
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On the interaction of rate-induced and bifurcation-induced tipping in ecosystems
… to identify a codimension-three degenerate Bogdanov-Takens bifurcation: the organising centre for bifurcation-induced tipping (B-tipping) and the source of a dangerous subcritical Hopf bifurcation. We introduce basin instability analysis to identify parameter paths along which rate-induced …
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Blood, Water and Mars: Soviet Science and the Alchemy for a New Man
… and experiments. The Bolshevik Alexander Bogdanov pioneered his revolutionary blood exchange experiments in his 1905 science fiction-utopian novel, <em>Red Star</em>. He founded Russia’s first blood research institute in hopes of facilitating the “comradely exchange of life” through blood …
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Critical Evaluation of Leadership Gender Diversity as a Driver of ESG Disclosure: A Case Study of Companies Listed on the Johannesburg Stock Exchange
The thesis examines the relationship between leadership gender diversity and Environmental, Social, and Governance (ESG) disclosure within Johannesburg Stock Exchange (JSE) - listed companies. Motivated by the increasing global emphasis on stakeholder capitalism, the study investigates whether the …
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Nonlinear dynamics of a nematic liquid crystal in the presence of a shear flow
… of the shear rate. The existence of a Takens-Bogdanov bifurcation in the underlying bifurcation diagram organises the steady and the time dependent solutions in the state diagram. The periodic orbits can be either of the wagging type, at intermediate values of the shear rate or of the tumbling …
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Energy exchange processes in erbium-doped fluoride glasses
In recent years there has been considerable interest in cross relaxation processes between ions in rare earth doped glasses and crystals. In particular interest has focused on diode-pumped lasers and optical waveguide amplifiers based on rare earth ions. This thesis is concerned with developing a …
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Formal verification of simulations between I/O automata
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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Aplicación de la teoría de bifurcaciones en sistemas de potencia eléctrica
… dinámico está dominado por una singularidad de Bogdanov-Takens, que conjuga la dinámica generada por las bifurcaciones de Hopf y silla-nodo, y en esta tesis ha sido hallada por primera vez en una región de operación factible. Por otro lado, en el modelo de 9 barras se distinguen tres …