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 75 for “"micro structure"”.
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On the role of topology and micro-structure on the adhesion and fracture of soft materials
… we focus on the effects of the macro and micro scale topology on the adhesion and fracture of soft materials. We start by investigating the possibility of manipulating interfacial adhesion by patterning geometric and structural features in the bulk. Inspired by the natural example of …
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Hypertrophic scar tissue : its microstructure and mechanical properties and the effects of pressure therapy
… the patient. This thesis presents the detailed micro-structure of hypertrophic scar tissue, as viewed with the S.E.M. and discusses the inter-relationship between the microstructure and mechanical properties of the tissue. The effect of sustained pressure (in the form of pressure therapy) upon …
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Effects of micro- and nano-structure on the deformation response of a Ag60Cu40 lamellar and rod-in-matrix eutectic alloy
… atomic percent) linking material deformation to microstructural properties. The Ag60Cu40 material system can be produced as either a multidirectional lamellar or unidirectional reinforcement-in-matrix micro-structure. Specimens of each micro-structure type were studied under quasi-static and …
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CHARACTERISATION OF THE MECHANICAL BEHAVIOUR OF NETWORKS AND WOVEN FABRICS WITH A DISCRETE HOMOGENIZATION MODEL
… of this material is strongly influenced by the micro-structure of the material. In the thesis mechanical models and a numerical scheme able to model the mechanical behaviour of woven fabrics and general network materials have been developed. The model takes in to account the micro-structure by …
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Magnetic Resonance Imaging (Mri) Studies of the Rat Olfactory System
… 3-D reconstructions of olfactory bulb and cavity micro-structure, in normal and neonatally denervated animals. The 3-D images offered improved flexibility in the analysis of large experimental imaging data-sets and rather detailed, well differentiated representation of various olfactory structures.
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Microstructure of Systems with Competition
<p>The micro-structure of systems with competition often exhibits many universal features. In this thesis, we study certain aspects of these structural features as well as the microscopic interactions using disparate exact and approximate techniques. This thesis can be broadly divided into two …
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Forecasting Short-Term Stock Returns Using Irregular Pricing Behavior in the Options Market
… An economic analyis of the options markets' micro-structure is discussed to establish the intuition and the basis behind the relationship. Four seperate models are developed to examine its statistical significance and the ability of options' prices to accurately forecast returns on the …
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Numerical simulations of die casting with uncertainty quantification and optimization using neural networks
… numerical simulations of solidification, micro-structure and mechanical properties prediction models along with experimental inputs for calibration and validation. In order to have a better prediction of product quality, both experimental data and stochastic variations in process …
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The applications for 3d inverse opal microstructures
Three-dimensional micro structures have been great interest to many scientists due to their useful properties. In this thesis, I show some examples of these 3-D micro structures applications, and in particular 3-D inverse opal micro structures made using spherical colloidal nanoparticles as …
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The development of a rapid chloride test for concrete and its use in engineering practice
… because of differences in their pore and micro-structure. The measured conductivity is related to the diffusibility ratio as well as to the theoretical steady state chloride diffusivity of concrete. Trial tests were performed to determine the optimum conditions for the test (sample …
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Calibrating high frequency trading data to agent based models using approximate Bayesian computation
… for the use of agent based models in market micro-structure. To date, there are no successful calibrations of agent based models to high frequency trading data. Here we test whether a more sophisticated calibration technique, SMC ABC, will achieve this feat on one of the leading agent based …
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Multi-agent Communication Protocols with Emergent Behaviour
… different agent technologies at both the micro and macro level. The micro structure involves the architecture of the individual components in the system whilst the macro structure involves the interaction relationships between these individual components in the system. Regarding the micro …
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Micro positionnement de deux fibres optiques à l'aide de l'algorithme d'essaim de particules et de l'algorithme génétique
… mono mode avec la fibre mono mode et la fibre à micro structure avec la fibre mono mode ont été étudiés. La performance du système est mesurée en termes de perte d'énergie optique et en termes de temps d'exécution. Les résultats montrent que les fibres peuvent être parfaitement …
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Coherence imaging technologies for the measurement of tissue and cell biomechanics
… changes and pathological variations in the micro-structure, such as during tumor development. The topic of this thesis falls at the intersection of biomechanics and optical imaging, and focuses on optical elastography, an optical sensing and imaging technique used to measure biomechanical …
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Structure and dynamics of mangetorheological fluids confined in microfluidic devices
Microfluidic devices and magnetorheological (MR) fluids have been two areas of intense research for several years. Traditionally, these two fields have remained separated from one another by scale. MR fluids are best known for their use in large-scale applications such as seismic dampers for the …
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Fabrication of polymer micro devices by ultrasonic hot embossing
In this thesis ultrasonic micro hot embossing is shown to be suitable for the fabrication of polymer micro structures and entire devices. Micro structures are generated in a couple of seconds. Similar as in hot embossing, a polymer film is softened by heating and a micro pattern is molded from a …
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The compressive behaviour of unidirectional carbon fibre reinforced plastic
… .the finite element analysis of the composite micro-structure, the latter providing infoxmation about the stress state at the fibre matrix interface, Different techniques used for measuring the unidirectional compressive strength of carbon fibre reinforced plastic are compared, since the …
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Effect of rare earths on the properties of cast iron
… of carbon flotation. The chemical analysis and micro-structure. examination verified this. All of the tensile specimens with carbon equivalent above the eutectic had flotation. As the carbon equivalent increased the carbon flotation increased. The graphite structure in the carbon flotation …
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A new class of auxetic lattices
… the macroscopic constitutive properties of these structures. The dependence of the effective properties on the constitutive and geometrical parameters of the micro-structure is given and a comparative analysis with hexagonal, triangular and square honeycombs is also performed. We have present also …
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