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 20 of 51 for “"Collective Dynamics"”.
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Collective Dynamics of Interacting Cell Types
… gene expression space that are invariant to the dynamics of gene regulation. In particular, I investigate physics-inspired dynamical systems that encode cell types as fixed point attractors. In the process, I derive a formal correspondence between Hopfield networks and restricted Boltzmann …
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Collective dynamics of astrocyte and cytoskeletal systems
… preparations now allow researchersto study collective behavior in cellular networks with unprecedented detail. Imaging the electrical signaling of neuronal networks at the cellular level has generated exciting insights into the multiscale interactions within the brain. This thesis aims at a …
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Collective dynamics in lattice models far from equilibrium
In this thesis, we explore the large-scale collective dynamics of lattice models that are far from equilibrium due to disorder, external driving, metastability and activity. First, we investigate the non-equilibrium behaviour of the three-dimensional random field Ising model at finite temperature, …
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Confinement-mediated accumulation and collective dynamics of microswimmers
… investigates the influence of geometry on the dynamics of confined microswimmers. We show that the presence of solid boundaries can encourage local accumulation, clustering, and even large-scale collective flows including at moderate concentrations. Following experimental work (either done by …
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Collective dynamics in flowing suspensions of swimming micro-organisms
… of individual bacteria, their large-scale collective motions have just recently received attention from scientists. It has been reported that, as concentration of such systems increases beyond a threshold, complex correlated dynamics on length scales much larger than the size of individual …
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Understanding the Collective Dynamics of Motile Cilia in Human Airways
… The rotors, that are coupled only via hydrodynamics interactions, are seen to phase-lock, and the shape of the trajectory they are driven along is seen to influence the steady state of the system.
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Long-time Behavior and Multiscale Description of Models of Collective Dynamics
We study the well-posedness and long-time dynamics of various models of collective dynamics.
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Optimal structures and collective dynamics of human flows in transportation networks.
… between transportation network properties and collective human flows. The theoretical background introduces essential concepts from network science and statistical physics, focusing on their application to spatial and transportation networks as well as urban systems. The thesis is devoted to …
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Collective dynamics of evolving populations and their strategies with application to medicine
… of Professor Nigel Goldenfeld: Population dynamics of viruses and their hosts, game theory and the social life of micro-organisms, a novel mechanism enhancing cooperation in evolutionary game theory, and evolutionary robust strategies for delivery of antibiotics. In the first project, …
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Motion of filaments induced by molecular motors: from individual to collective dynamics
… development in Drosophila melanogaster, complex dynamics arise, but the mechanism underlying them has remained unclear. Motivated by these observations, through a combination of theoretical analysis and numerical simulations, we study a simplified microtubules-molecular motor system. Microtubules …
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Iranians in the United States and Japan: Self -Imagery and Individual -Collective Dynamics
The meaning-space thus generated individually and collectively can be captured by the concepts of liminality and the zone of proximal development. These concepts, with some shifts in theoretical foci, cast light on the radical analytical and integrative movements characteristic to migrants' daily …
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Modeling and Analysis of the Collective Dynamics of Large-Scale Multi-Agent Systems
Keywords. multi-agent systems, distributed artificial intelligence, theoretical computer science, formal methods, computational complexity, cellular and network automata, agent-based modeling, discrete dynamical systems, complex systems.
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Modeling collective dynamics of social systems: Incorporating various social mechanisms into agent-based models
… demonstrating complex behavior arising from collective dynamics in agent-based models (ABM) focusing on evolutionary and cognitive mechanisms. The first report demonstrates the coupled emergence of cooperation and selfish punishment behavior in groups of individuals playing an iterated public …
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Controlling the collective dynamics in systems of active oscillators through geometry and hydrodynamic entrainment
… is spatially dependent, and so the steady state dynamics of the oscillators can be controlled using their positions. I study 'rower' oscillators, a highly simplified model for motile cilia that approximates each cilium by a rigid sphere that is driven by a geometrically updated force. The …
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Theory and simulations of confined active suspensions
… regime are known to give rise to collective motion and large-scale spatiotemporal coherent patterns. The mechanisms behind the emergence of collective dynamics and self-organization from individual interactions has received increasing attention in the past few years, and could …
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Learning and investigating phenomenological models for active matter
… have enabled the precise characterization of the collective dynamics in such biological and engineered active systems. In parallel, data-driven algorithms for learning interpretable continuum models have shown promising potential for the recovery of underlying partial differential equations (PDEs) …
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Meaningful internationalization: a study among the leaders of Brazilian smaller enterprises
… the role of choice, interpretation and the collective dynamics of meaningful action. Drawing on Weber’s (1964; 1978) argument that social action is meaningful the thesis advances an integrative view of internationalization as a meaningful action characterized by the interplay of choice, …
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Feedback control of complex oscillatory systems
… with a goal to suppress their synchronous collective dynamics. The other part is aimed at investigating linear feedback control of coherence of a noisy or chaotic self-sustained oscillator. First we start with a problem of suppressing synchronization in a large population of interacting …
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An individual-based GPU simulation framework for collective bacterial dynamics in swarms and biofilms
… to uncover the governing forces driving the dynamics in microbial systems. Our model incorporates the biophysical processes of cell growth and division, viscous drag, bacteria self-propulsion, and mechanical cell-surface and cell-cell interactions through interaction potentials. In …
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