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 20 of 74 for “"spatiotemporal dynamics"”.
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Spatiotemporal dynamics of cell division in intestinal homeostasis
… cycle, contribute. This thesis investigates the spatiotemporal control of cell division in intestinal crypts to understand the relationship between cell-cycle specific fate choices and intestinal homeostasis.<br/><br/>Firstly, I describe a novel mode of asymmetric cell division within intestinal …
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Spatiotemporal dynamics of a photorefractive phase-conjugate resonator
The spatiotemporal dynamics of a photorefractive phase-conjugate resonator (PPCR) is studied both experimentally and analytically. The resonator is a confocal cavity bounded by a dielectric mirror and a phase-conjugate mirror in a four wave mixing geometry. The effect of the Bragg mismatch, which …
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Spatiotemporal Dynamics of Tissue Oxygenation in Awake, Behaving Mice
… signal imaging and two-photon imaging of hemodynamics in awake, head-fixed mice that were free to ambulate on an air-supported ball treadmill, I observed robust biphasic changes in oxyhemoglobin, deoxyhemoglobin and vascular cell intracellular [Ca2+] in response to prolonged whisker …
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Ultrafast spatiotemporal dynamics of photoexcitations in two-dimensional semiconductors
… First, we explore the spatio-temporal dynamics of photo-excited species in monolayer transition metal dichalcogenides. Using pump-probe spectroscopy, and a range of steady state characterization techniques (ellipsometry, reflectance, photoluminescence), we study the formation and decay …
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The Spatiotemporal Dynamics of Nutrient Exchange at the Arbuscule
… This PhD work therefore aimed to uncover the spatiotemporal dynamics of nutrient exchange at the arbuscule during AM symbiosis. Fluorescent reporter lines in rice and novel microscopy techniques were developed to follow the localisations of AM-specific nutrient transporter proteins throughout …
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Protein spatiotemporal dynamics in gene regulation and disease pathology
… the intricate mechanisms governing protein spatiotemporal dynamics as well as the functional consequences. This thesis focuses on the physical motions of proteins at a length scale of tens of nanometers to several microns, where the apparent diffusion and the condensate dynamics of assembly …
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The Complex Spatiotemporal Dynamics of a Shallow Fluid Layer
The nonlinear and chaotic dynamics of a shallow fluid layer are investigated numerically using large-scale parallel numerical simulations. Two particular situations are studied in detail. First, a fluid layer is placed between rigid boundaries and heated from below to yield the chaotic dynamics of …
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Investigating the spatiotemporal dynamics of mononuclear phagocytes in solid tumours.
… activity. In this work, we aimed to resolve the spatiotemporal dynamics of MNPs following tumour infiltration and investigate how immune checkpoint blockade (ICB) treatment influences this. We utilised a photo-convertible mouse model, combined with single-cell RNA sequencing, confocal imaging and …
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Optimal distributed control and estimation for systems with spatiotemporal dynamics
… and estimation synthesis for systems with spatiotemporal dynamics. Emphasis is placed on the state estimation problem for dynamical systems with shift-invariances over unbounded spatial domains and with distributed noisy measurements. Dimensional analysis and scaling arguments are used to …
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Bayesian hierarchical approaches to analyze spatiotemporal dynamics of fish populations
The study of spatiotemporal dynamics of fish populations is important for both stock assessment and fishery management. I explored the impacts of environmental and anthropogenic factors on spatiotemporal patterns of fish populations, and contributed to stock assessment and management by …
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The spatiotemporal dynamics of visual attention during real-world event perception
Everyday event perception requires us to perceive a nearly constant stream of dynamic information. Although we perceive these events as being continuous, there is ample evidence that we “chunk” our experiences into manageable bits (Zacks & Swallow, 2007). These chunks can occur at fine and coarse …
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Spatiotemporal dynamics of grounwater in the Andean Highlands in northern Ecuador
… were used to determine the groundwater dynamics by means of some essential variables that SWAT model does not provide. A SWAT model was configured over the period 2006¿2015. A stationarity analysis prior implementing the numerical model was implemented to asseverate that the modelling …
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Spatiotemporal Dynamics of CaMKI During Structural Plasticity of Single Dendritic Spines
… regulatory role based on differences in the spatiotemporal dynamics of activity. While the function and activity of CaMKII in synaptic plasticity has been extensively studied, that of CaMKI, another major class of CaMK required for LTP, still remain elusive. </p><p>Here, we develop a …
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Spatiotemporal Dynamics of Neural Activity During Human Episodic Memory Encoding and Retrieval
Throughout literary history, the ability to travel in time has been a source of wonder and amusement. Why this fascination with moving through time? One reason may be that people are especially attuned to the concept of time travel because we each possess our own personal mental time machine: …
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Spatiotemporal Dynamics of Microbial Communities Colonizing Plastic Tent Fabrics in a Tropical Environment
<p>Plastic polymers provide immense utility in almost all industries. However, their mass production and persistence in natural ecosystems has resulted in a significant accumulation of plastic waste in our biosphere. To protect structurally important plastic products from degradation as well as …
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The Spatiotemporal Dynamics of Nomadic Behavior in the Clonal Raider Ant, Ooceraea Biroi
… I developed an assay in which I could study the dynamics of their never-before-seen nest relocation habits with unprecedented experimental control. In this thesis I present two projects which aimed to 1) discern how nomadism fits <em>into O. biroi's</em> life history, and 2) uncover the …
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Spatiotemporal Dynamics of Snow-Free Frost Exposure in the Western Cordillera Seasonal Snow Zones
… This thesis addresses this gap by analyzing the spatiotemporal dynamics of snow-free frost days (SFFDs), defined as days with maximum air temperatures below 0°C and minimal snow cover (≤20 mm Snow Water Equivalent), across the Western Cordillera. Using a quality-controlled dataset of daily …
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The spatiotemporal dynamics of bacterial and fungal abundance in Great Plains non-perennial streams
Non-perennial streams comprise approximately 50% of global stream length and 59% across the continental U.S. Non-perennial streams are also predicted to become more common, since increased length and time of drying in rivers and streams is a widespread symptom of climate change. These substantial …
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Spatiotemporal Dynamics and Climate-Driven Risk of Compound Flood Events in the Great Lakes Basin
… worldwide. Understanding their mechanisms, spatiotemporal patterns and projected changes is crucial to develop effective strategies for risk mitigation. This study analyzes three types of climate-driven flood events in the Great Lakes basin, driven by Rain-on-Snow (ROS), Saturation Excess …
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