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 15 of 15 for “"Multiscale structure"”.
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DISORDERING IN PYROCHLORE PHASES FOR RADIONUCLIDES DISPOSAL: A MULTISCALE STRUCTURE STUDY
… the general formula A2B2O7 and the pyrochlore structure have drawn much attention in the field of radionuclides immobilization. The Gd2Zr2O7 composition, in particular, has demonstrated high radiation resistance, making it an ideal host-matrix for encapsulating radioactive elements within the …
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Multiscale structure detection and its application to image segmentation and motion analysis
The problem of structure detection in images involves the identification of local groups of pixels that are both homogeneous and dissimilar to all nearby areas. Homogeneity can be measured with respect to any criteria of interest, such as color, texture, motion, or depth. No prior knowledge is …
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Relating multiscale structure and chemistry with oxygen exchange kinetics in low-thermal-budget Sr(Ti,Fe)O3-d and high-throughput combinatorial thin films
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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Novel method for carbon nanofilament growth on carbon fibers
… using palladium as a catalyst to create multiscale fiber reinforcing structures with potential applications in structural composites. Employing a relatively new method, in which carbon structures are grown from fuel rich combustion mixtures on certain catalytic metals, multiscale filament …
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Transport maps for accelerated Bayesian computation
… and when the posterior has complex non-Gaussian structure. This thesis addresses these challenges by developing new approaches for both exact and approximate posterior sampling. In particular, we make use of deterministic couplings between random variables--i.e., transport maps--to accelerate …
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Multiscale mechanical studies of nacre from gastropod mollusk Trochus Nilocitus
… properties thanks to a complex hierarchical structure allowing an extraordinary variety of energy-dissipating mechanisms. Our aim is to continue to formulate multiscale structure-property relationships to eventually aid in the design and advancement of new synthetic biologically inspired …
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Multi-scale and multi-spectral shape analysis: from 2d to 3d
… in this dissertation, in order to find the multiscale processing for the 3D shape, we start with shape vector image diffusion framework using the geometric mapping. Subsequently, we investigate the shape spectrum field by introducing the implementation and application of Laplacian shape …
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Structural Design Inspired by the Multiscale Mechanics of the Lightweight and Energy Absorbent Cuttlebone
… mechanical efficiency is enabled by the multiscale structure of cuttlebone. Using the common cuttlefish, Sepia Officinalis, as a model system, we first conducted high-resolution synchrotron micro-computed tomography (µ-CT) and quantified the cuttlebone's multiscale geometry, including the …
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Analysis and modeling of inelasticity in tendon: viscoelasticity, damage, and plastic deformation
… mechanical response in relationship to its structure is missing. ☐ The objective of this dissertation was to analyze and model the inelastic behaviors in tendon, which can be categorized into viscoelasticity, damage, and plastic deformation, and study their underlying mechanisms by using …
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Themes in numerical tensor calculus
… black-box compression format for tensors with a multiscale structure. By representing the tensor as a sum of compressed tensors defined on increasingly coarse grids, the format captures low-rank structures on each grid-scale, which leads to an increase in compression for a fixed accuracy. …
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High throughput prototyping and multiscale indentation characterization of metallic alloys
… sample prototyping, testing methods, and microstructure characterization techniques. In addition, the hierarchical multiscale structure of advanced materials holds the key to improving their performance characteristics. In order to understand and characterize microscale constituents, and length …
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A Hybrid Spectral-Element / Finite-Element Time-Domain Method for Multiscale Electromagnetic Simulations
… (FETD) method for transient analysis of multiscale electromagnetic problems, where electrically fine structures with details much smaller than a typical wavelength and electrically coarse structures comparable to or larger than a typical wavelength coexist.</p><p>Simulations of multiscale …
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Using Deep Learning to Understand and Design Heterogeneous Materials
… aim at addressing these challenges by combining multiscale modeling techniques and machine learning (ML) models to accelerate property calculation and design of heterogeneous materials. We begin with developing artificial intelligence (AI)-based surrogate models for building multiscale …
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Preclinical translation of therapeutic interventions for tendon injury
… re-injury rates and do not restore the optimized multiscale structure and function of the healthy tendon or attachment. Investigations are needed to further develop and validate methods to prevent re-injury and improve tendon and attachment healing. The overall goal of this dissertation was to …
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Multiscale Structures and Mechanics of Biomineralized Lattices in Hexactinellid sponges and Echinoderms
… mineral contents (~ 99 wt%), usually "conceal" multiscale structural arrangements for unique mechanical or functional performance, such as the remarkable damage tolerance despite of the brittle nature of the constituents (e.g., biogenic silica and calcite). However, the quantitative explorations …