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 30 for “"Dendritic Growth"”.
-
Numerical simulation of dendritic growth of binary alloys
… finite element model for simulation of dendritic solidification of binary alloys is developed. The model solves the coupled time-dependent temperature and solute concentration equations on two independent meshes: a fixed mesh for the temperature and an adaptive interface-conforming mesh …
-
Phase-Fields and the Renormalization Group: A Continuum Approach to Multiscale Modeling of Materials
… also examines the effect of confinement on dendritic growth, during equiaxed solidification in a pure material and the directional solidification of a dilute binary alloy, using phase-field models.
-
Growth Cone Pathfinding and Neuromuscular Synaptogenesis in Drosophila Midline Mutants
… how abnormal midline decisions affect subsequent growth cone pathfinding. Results showed that despite abnormal decisions at the midline, subsequent pathways and synaptic targeting in all cases were the perfect mirror-images of those seen in wildtype. This suggests that a growth cones' particular …
-
Mechanisms of Estrogen-Dependent Dendrogenesis in Motoneurons of the Spinal Nucleus of the Bulbocavernosus
… period. This estrogen-dependent SNB dendrite growth is mediated by estrogen receptors (ERs) in the SNB target musculature (the bulbocavernosus, BC). I have demonstrated that ERα expression in BC extra-muscle fiber cells defines the critical period for estrogen-dependent SNB dendrite growth, …
-
Renormalization group methods for dynamics of spatially extended systems
… interface limit of various phase field models of dendritic growth. We demonstrate the virtue of using coarse grained variables in simulations, as opposed to uniformly sampling the underlying continuous configuration. By coarse graining a system repeatedly, the 'perfect linear' operator is obtained …
-
Thermoelectric magnetohydrodynamics in dendritic solidification
… which can significantly effect the mechanism of dendritic growth. The work contained in this thesis provides an initial insight into the complex behaviour of this process, through the use of numerical models. To model the soldification dynamics, an enthalpy based model for dendritic growth in a …
-
Modeling Synapse Formation and Growth as a Non-Biological Analog to the Brain
… ion transport and subsequent filament growth. Simulations allow for the extraction of meaningful parameter relationships as well as governing equations relating both filament length and time, and current and time. By investigating electric potential-driven cation diffusion, the model …
-
Instabilities and flow-induced structures in anisotropic systems
… properties. Examples range from microscopic dendritic snowflakes to macroscopic sand ripples and intricate river networks. Central to the formation of patterns is the concept of an instability; complex forms spontaneously develop when a system is driven out of equilibrium. Nature leverages …
-
Developmental origins of cortical circuit dysfunction in a 22q11 deletion mouse model
… 2 investigated how 22q11 deletion alters L2/3 PN growth and development. LgDel neurons displayed oxidative stress, mitochondrial dysfunction, and reduced neurite growth. Treatment with the antioxidant N-acetylcysteine (NAC) improved axonal and dendritic growth but did not restore expression of …
-
Analysis and Chemical Applications of Metal–Metal Bonds and Large Language Models
… issues with interfacial instability and dendritic growth, promoting the formation of a more uniform and stable solid electrolyte interphase and enabling improved cycling efficiency. To expand the application of data–driven molecular design, bond dissociation energies and reactivity trends …
-
Analytical and Computational Studies of Convection in Solidifying Binary Media
… occurs, resulting in the formation of a layer of dendritic growth called a mushy layer. The mushy layer has both solid and fluid components. We consider the problem of nonlinear steady buoyant convection in horizontal mushy layers during the solidification of binary alloys. Both cases of zero …
-
Tracking the Function and Failure of Li-Air Electrolytes using Electrochemical and Spectroscopic Methods
… overpotentials, parasitic side reactions and dendritic growth at the Li-metal anode and degradation of the electrolyte. One way to overcome the high overpotentials is through the introduction of a redox mediator (RM), a soluble catalyst that facilitates the solution-based growth of discharge …
-
Mechanism for Gamma-Precipitation in Aluminum-Silver Alloys and Self-Assembly of Polyelectrolytes: Modeling of Complex Layered Materials
… classical nucleation theory in combination with dendritic growth of secondary, nucleating edge structures gives √t increase in hcp precipitate width-to-thickness aspect ratio with time t. My aspect-ratio model is the first theory of which I am aware that accurately predicts an increasing …
-
The generation and characterization of transgenic mice expressing modifiers of Rho GTPases
… is not still clear in terms of axonal and dendritic growth during mammalian development. There are numerous data suggesting the important role of Rho GTPases in axonal guidance in vitro, however, there has been little direct evidence of these proteins in the in vivo context in mammals. To …
-
The Genetic Basis Of Neurodegenerative Diseases: The Role Of Sel1L In Tau Pathology And Neuropathology
… lifespan of 8-10 weeks and show significant growth retardation. These mice progressively developed motor dysfunction, manifested by abnormal limb clasping, impaired gross and fine motor coordination, and loss of body strength. In addition, Sel1l-NKO mice exhibited broad deficits in spatial …
-
Nuclear Magnetic Resonance Studies of Lithium Metal Anodes
… problems associated with microstructural and dendritic growth of lithium. In this work, nuclear magnetic resonance (NMR) spectroscopy is used to understand the effect of the solid electrolyte interphase (SEI) on lithium metal deposition. In situ NMR is used to quantify the lithium …
-
Morphological Studies of Crystallization in Thin Films of PEO/PMMA Blends
… morphologies and morphological transitions. The dendritic region of the map (~ 30 = 40 wt% PEO) was studied in detail. Changes in the diffusion length were achieved through variation of the PMMA molecular weight, and were shown to influence the secondary sidebranch spacing. Sidebranch spacing …
-
Acoustic emission from the crystallization of potassium bromide doped with lead
… that causes acoustic emission (AE) during growth of potassium bromide (KBr) crystals. The generation mechanism postulated here is one of inter-crystal interaction. AE was used to monitor the growth of different crystal structures of KBr grown with varying degrees of lead (Pb) dopant …
-
Composition and microstructure evolution in semi-solid cast Al-Zn alloys
… was one of alternating planar and cellular growth, and that dendritic growth did not occur during the semi-solid metal rheocasting. This was highlighted by the absence of inter-dendritic liquid and the presence of internal crystallographic misorientations in many of the grains in the as-cast …
-
Characterization of battery anode materials by X-ray and electron-based imaging techniques
… sites and helps to explain the nucleation and growth behavior of dendrites. Lastly, a Li10SnP2S12 (LSPS) solid-state electrolyte was employed in a Li-S cell to mitigate the side reactions of liquid electrolyte and suppress the dendritic growth. In-situ and operando synchrotron tomography and …
Page 1 of 2