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 380 for “"Plaques"”.
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Ultrasound features of human carotid plaques
Atherosclerotic plaques in the carotid arteries are common in a middle-aged population. When a carotid plaque ruptures it may result in a cerebrovascular event. However, only a minor part of carotid plaques will eventually rupture. Finding those plaques is essential to decide the most appropriate …
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Fibre Microstructure and Mechanics of Atherosclerotic Plaques
… mechanics and rupture risk of atherosclerotic plaques. Fibre structures in human atherosclerotic plaques were characterised through scanning electron microscopy, histology, and image processing. Local primary fibre orientation and the fibre dispersion were calculated. Plaque shoulder regions, …
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Estimation of nonlinear mechanical properties of atherosclerotic plaques
… the mechanical properties of atherosclerotic plaques by combining genetic algorithm with finite element methods. Plaque images derived from optical coherence tomography were employed to construct finite element models which were subsequently used in conjunction with a genetic algorithm to …
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Ultrasonic Characterization of Human Coronary Arteries and Atherosclerotic Plaques
… ultrasound interacts with arterial tissue and plaques may provide benefit to patients with coronary artery disease. The two-fold goal of the studies presented in this thesis was to better understand the fundamental physics of the relationship between ultrasound and coronary artery tissue and to …
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Identifying Vulnerable Plaques with Acoustic Radiation Force Impulse Imaging
<p>The rupture of arterial plaques is the most common cause of ischemic complications including stroke, the fourth leading cause of death and number one cause of long term disability in the United States. Unfortunately, because conventional diagnostic tools fail to identify plaques that confer the …
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Calcul des poutres-caissons par la méthode des assemblages des plaques
… la poutre-caisson en un nombre d'éléments plaques géométriquement limités par les lignes de pliage, n'importe quelle combinaison de charges pourrait être envisagée; après avoir résolu les dé placements aux noeuds, les contraintes et les déplacements à n'importe quel point d'une plaque …
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Interférence cognitivo-motrice chez les personnes atteintes de sclérose en plaques
A thesis presented to the Faculty of Medicine and Health Sciences in partial fulfillment of the requirements of the degree of Master of Science in Health sciences, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec, Canada, J1H 5N4 Background: Multiple sclerosis …
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Development of multimodal spectroscopy for the detection of vulnerable atherosclerotic plaques
… useful in detecting vulnerable atherosclerotic plaques, that is, plaques most prone to rupture and causing sudden death. Early detection of these vulnerable plaques is critical to reducing patient mortality associated with cardiovascular disease. In developing MMS into a clinical diagnostic …
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Étude numérique et expérimentale du comportement non linéaire des plaques perforées en présence d’écoulement
… expérimentalement la réponse acoustique de plaques macro-perforées (pourcentage de surface ouverte (POA) jusqu’à 40% et diamètre jusqu’à 3 mm), en présence d’un écoulement rasant et soumis à des niveaux de pression acoustique (SPL) élevés jusqu’à 180 dB. Tout d’abord, une méthode pour …
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A cellular automaton – based system for the identification of topological features of carotid artery plaques
… and provide topological information about such plaques. In order to negate the cost of specialised hardware, only the sound produced by blood-flow around the occlusion is used; this raises problems that prevent the application of existing medical imaging techniques, however, these can be …
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Investigation Into The Role Of Biomechanical Forces In Determining The Behaviour of Coronary Atherosclerotic Plaques
… histological work has demonstrated that ruptured plaques are associated with higher stress compared to non-ruptured controls, with in vivo VH-IVUS studies linking higher plaque structural stress (PSS) with the presentation of acute coronary syndrome. Wall shear stress (WSS) on the other hand has …
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Biomechanical Analysis of Human Coronary Atherosclerotic Plaques in Response to Pharmacotherapy, and in Predicting Adverse Clinical Events
… histological work has demonstrated that ruptured plaques are associated with higher stress, with in vivo intravascular studies linking higher plaque structural stress (PSS) with the presentation of acute coronary syndrome. Endothelial shear stress (ESS) on the other hand has been implicated in …
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For and Beyond the Plaques: Sustainable Certification Adoption and Its Impact on Real Estate Decision-Making in the Boston-Cambridge Market
As demand for green and healthy buildings grows, real estate developers face complex decisions regarding building certification adoptions, which have become influential in real estate market dynamics. This thesis investigates how developers in the competitive Boston-Cambridge area navigate the …
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Rôle des entraves perçues et des comportements d'autoprise en charge dans la qualité de vie des personnes atteintes de sclérose en plaques
… auprès des individus atteints de solérose en plaques (SEP) ont surtout étudié les liens entre la condition de santé, les caractéristiques personnelles (ex : estime de soi) ou les ressources individuelles (ex : soutien social), et la qualité de vie reliée à la santé (QVRS). Alors que des …
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L' efficacité perçue des stratégies d'autosoins utilisées pour gérer la fatigue chez les personnes atteintes de sclérose en plaques
… les jours des personnes atteintes de sclérose en plaques. De nombreuses recherches tentent d'enrichir les connaissances au sujet de ce symptôme, mais le phénomène demeure complexe. Quoique l'on connaisse certaines stratégies d'autosoins utilisées par cette population, très peu d'études se sont …
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Characterization of Variable Region Structures and Antigen-Binding Properties of OxLDL-Specific Human Monoclonal Antibody Isolated from PBMC and Atherotic Plaques of Atherosclerosis Patients
… VH and VL sequences of the Fab produced from the plaques and comparison them with those from PBMC. This study will improve the knowledge of the mechanism which are related to the pathogenesis of atherosclerosis and provide a basis for developing of new therapeutics which can regulate the …
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Carotid Atherosclerosis: Why Some Patients are Symptomatic and Others Not?
… In coronary vasculature it has been shown that plaques from symptomatic patients are friable and thus more likely to undergo plaque rupture to precipitate symptoms. If this happens in the carotid arteries, this can lead to occlusion of cerebral arteries to cause transient ischemic attack (TIA) …
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Effects of cell growth and a mobile genetic element on propagation of the phages SP16 and SP-beta in Bacillus subtilis
… as cells approach stationary phase. SP16 makes plaques of different sizes. I found that this variegated plaque size did not seem to breed true. That is, phage from large plaques gave rise to both large and small plaques. On the other hand, phage were difficult to recover from small plaques, …
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Molecular orientation and relaxation behavior in flexible water- blown polyurethane foams
… foams and their respective compression molded plaques as well as a chemically similar polyurea-urethane elastomer, PUUE, were studied to better understand the relaxation behavior and the molecular orientation upon deformation in these systems. The two main experimental techniques used in this …
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