Rozprawy doktorskie na temat „Blood flow - Mathematical models”
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Pincombe, Brandon. "A study of non-Newtonian behaviour of blood flow through stenosed arteries /". Title page, contents and summary only, 1999. http://web4.library.adelaide.edu.au/theses/09PH/09php6469.pdf.
Pełny tekst źródłaHealy, Timothy M. "Multi-block and overset-block domain decomposition techniques for cardiovascular flow simulation". Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/15622.
Pełny tekst źródłaCarrig, Pauline Elize. "The effect of blood chemistry on the rheological properties of the fluid". Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/94451.
Pełny tekst źródłaM.S.
Hong, Say Yenh. "Fluid structure interaction modeling of pulsatile blood flow in serial pulmonary artery stenoses". Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=112571.
Pełny tekst źródłaAng, Keng Cheng. "A computational fluid dynamic study of blood flow through stenosed arteries /". Title page, table of contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09pha5808.pdf.
Pełny tekst źródłaFry, Brendan. "Theoretical Models for Blood Flow Regulation in Heterogeneous Microvascular Networks". Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/293413.
Pełny tekst źródłaAlirezaye-Davatgar, Mohammad Taghi Graduate School of Biomedical Engineering Faculty of Engineering UNSW. "Numerical simulation of blood flow in the systemic vasculature incorporating gravitational force with application to the cerebral circulation". Awarded by:University of New South Wales. Graduate School of Biomedical Engineering, 2006. http://handle.unsw.edu.au/1959.4/26177.
Pełny tekst źródłaBouchnita, Anass. "Mathematical modelling of blood coagulation and thrombus formation under flow in normal and pathological conditions". Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1300/document.
Pełny tekst źródłaThis thesis is devoted to the mathematical modelling of blood coagulation and clot formation under flow in normal and pathological conditions. Blood coagulation is a defensive mechanism that prevents the loss of blood upon the rupture of endothelial tissues. It is a complex process that is regulated by different mechanical and biochemical mechanisms. The formation of the blood clot takes place in blood flow. In this context, low-shear flow stimulates clot growth while high-shear blood circulation limits it. The disorders that affect the blood clotting system can provoke different abnormalities such thrombosis (exaggerated clotting) or bleeding (insufficient clotting). In the first part of the thesis, we introduce a mathematical model of blood coagulation. The model captures the essential dynamics of clot growth in quiescent plasma and blood flow. The model can be reduced to a one equation model of thrombin generation that gives approximately the same results. We used both numerical simulations and mathematical investigation to show the existence of different regimes of blood coagulation. We specify the conditions of these regimes on various pathophysiological parameters of the model. Then, we quantify the effects of various mechanisms on clot growth such as blood flow and platelet aggregation. The next part of the thesis studies some of the abnormalities of the blood clotting system. We begin by investigating the development of thrombosis in patients with antihrombin deficiency and inflammatory diseases. We determine the thrombosis threshold on antithrombin and quantify the effect of inflammatory cytokines on the coagulation process. Next, we study the recovery from blood loss following bleeding using a multiscale model which focuses on erythropoiesis and hemoglobin production. Then, we evaluate the risk of thrombosis in patients with cancer (multiple myeloma in particular) and HIV by combining the blood coagulation model results with the output of hybrid multiscale models of the corresponding physiological system. Finally, possible clinical applications of the blood coagulation modelling are provided. By combining clot formation model with pharmacokinetics-pharmacodynamics (PK-PD) models of anticoagulant drugs, we quantify the action of these treatments and predict their effect on individual patients
Lucas, Claire. "An anatomical model of the cerebral vasculature and blood flow". Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:37d408b6-b804-4085-b420-a9704aeb97eb.
Pełny tekst źródłaBevan, Rhodri L. T. "A locally conservative Galerkin approach for subject-specific biofluid dynamics". Thesis, Swansea University, 2010. https://cronfa.swan.ac.uk/Record/cronfa42314.
Pełny tekst źródłaHye, Md Abdul. "Simulation of transient blood flow in models of arterial stenosis and aneurysm". Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3836/.
Pełny tekst źródłaYu, Xiaohong, i 于曉紅. "Hemodynamic analysis of blood flows in carotid bifurcations". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B3864700X.
Pełny tekst źródłaJordan, Sumanas W. "A mathematical model of tissue factor-induced blood coagulation: discrete sites of initiation and regulation under conditions of flow". Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33907.
Pełny tekst źródłaKhalil, Adil. "Processing of laser speckle contrast images : study of mathematical models and use of nonlinear analyses to investigate the impact of aging on microvascular blood flow". Thesis, Angers, 2017. http://www.theses.fr/2017ANGE0006/document.
Pełny tekst źródłaAging is a primary risk factor for cardiovascular diseases. It is associated with functional and structural alterations in the vascular system. Therefore, a deep study of the aging process and the development of imaging systems and associated processing become of the utmost importance. By processing laser speckle contrast images (LSCI), this PhD work aims at studying the influence of age on microcirculation. In our work, LSCI data were acquired from the skin forearm of healthy subjects, subdivided into two age groups (younger and older). From mathematical models, we determined red blood cells velocity in microcirculation in the two groups of subjects. Moreover, we applied multiscale entropy-based algorithms to LSCI time series in order to study the complexity of microvascular signals. Our main findings are: 1) the older group has significantly higher velocity values than the younger group at post-occlusive reactive hyperaemia; 2) LSCI fluctuations in the younger group have significantly higher complexity than those of the older group. Age-related changes in skin microcirculation can be attributed to alterations in the vascular system as a whole. Understanding these changes in the microcirculatory system may give new insights for prevention and treatment of age-related diseases
El-Bouri, Wahbi K. "Multi-scale modelling of the microvasculature in the human cerebral cortex". Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:8a9409a6-6279-4f7b-a975-b70149732378.
Pełny tekst źródłaWayman, Brian H. "Arterial Response to Local Mechanical Variables: The Effects of Circumferential and Shear Stress". Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/22611.
Pełny tekst źródłaMyers, Lance Jonathan. "Mathematical modeling of foetal arterial blood flow". Doctoral thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/5143.
Pełny tekst źródłaThe aim of this thesis was to develop an accurate and comprehensive computer model of the foetal circulatory system and to use this model to investigate influences of various haemodynamic viriables on common Doppler blood flow velocity waveform indices. The foetal model consists of an number of vascular compartments, cascaded together using electrical transmission line analogies.
Arciero, Julia. "Theoretical Models of Blood Flow Regulation". Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/195903.
Pełny tekst źródłaJohnson, Kevin Robert. "In Vivo Coronary Wall Shear Stress Determination Using CT, MRI, and Computational Fluid Dynamics". Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14482.
Pełny tekst źródłaPark, Chang Sub. "Mathematical techniques for the analysis of unsteady blood flow". Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.532000.
Pełny tekst źródłaGuvenen, Haldun. "Aerodynamics of bodies in shear flow". Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184917.
Pełny tekst źródłaFiechter, Jerome. "Numerical study of platelet transport in flowing blood". Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16770.
Pełny tekst źródłaLamponi, Daniele. "One dimensional and multiscale models for blood flow circulation /". [S.l.] : [s.n.], 2004. http://library.epfl.ch/theses/?nr=3006.
Pełny tekst źródłaLowdermilk, Jennifer L. "Mathematical modeling of incompressible flow through a collapsible tube /". Online version of thesis, 1992. http://hdl.handle.net/1850/10859.
Pełny tekst źródłaWong, Ka-chung Colin, i 黃家聰. "Hydraulics of bottom rack chamber for supercritical flow diversion". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B42664469.
Pełny tekst źródłaHenry, Eric James. "Contaminant induced flow effects in variably-saturated porous media". Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/191256.
Pełny tekst źródłaZeidan, Dia Hussein Abdulhameed. "Mathematical and numerical study of two-phase flow models". Thesis, Manchester Metropolitan University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396533.
Pełny tekst źródłaWang, Ying, i 王瑩. "A study of mutual fund flow and market return volatility". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B26843572.
Pełny tekst źródłaPathmanathan, Saidharshini. "Development of in vitro models of cerebral ischaemia". Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249162.
Pełny tekst źródłaSempere, Alfonso FerraÌndez. "Computational models of blood flow in the circle of willis". Thesis, University of Leeds, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427838.
Pełny tekst źródłaBASEGHI, BEHDAD. "THREE-DIMENSIONAL SEEPAGE THROUGH POROUS MEDIA WITH THE RESIDUAL FLOW PROCEDURE". Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184107.
Pełny tekst źródłaChan, Johnson Lap-Kay. "Numerical procedure for potential flow problems with a free surface". Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/28637.
Pełny tekst źródłaApplied Science, Faculty of
Mechanical Engineering, Department of
Graduate
Liu, Peng, i 刘鹏. "Flow mechanisms in horizontal sediment-laden jets". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B49799496.
Pełny tekst źródłapublished_or_final_version
Civil Engineering
Doctoral
Doctor of Philosophy
Zoebelein, Till. "Development of an LU-scheme for the solution of hypersonic non-equilibrium flow". Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/12509.
Pełny tekst źródłaWong, Ching-chi, i 黃精治. "Flow and pollutant dispersion over idealized urban street canyons using large-eddy simulation". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/206698.
Pełny tekst źródłapublished_or_final_version
Mechanical Engineering
Doctoral
Doctor of Philosophy
Grm, Aleksander. "Mathematical analysis of macroscopic models for slow dense granular flow". [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=98408214X.
Pełny tekst źródłaPeng, Jixian, i 彭继娴. "Macroscopic characteristics of dense road networks". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/195994.
Pełny tekst źródłapublished_or_final_version
Civil Engineering
Master
Master of Philosophy
Yan, Li, i 顏理. "On the traffic flow control system". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39431174.
Pełny tekst źródłaMarth, Wieland. "Hydrodynamic Diffuse Interface Models for Cell Morphology and Motility". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-204651.
Pełny tekst źródłaDiese Dissertation beschäftigt sich mit mathematischen Modellen zur Beschreibung von Gleichgewichts- und dynamischen Zuständen von verallgemeinerten biologischen Zellen. Die Zellen werden dabei als thermodynamisches System aufgefasst, bei dem Strömungseffekte innerhalb und außerhalb der Zelle zusammen mit einem Helfrich-Modell für Zellmembranen kombiniert werden. Schließlich werden durch einen Energie-Variations-Ansatz die Evolutionsgleichungen für die Zelle hergeleitet. Es ergeben sie dabei Mehrphasen-Systeme, die Strömungseffekte mit einem freien Randwertproblem, das zusätzlich physikalischen Einflüssen wie Biegung und Oberflächenspannung unterliegt, vereinen. Um solche Probleme effizient zu lösen, wird in dieser Arbeit die Diffuse-Interface-Methode verwendet. Ein Vorteil dieser Methode ist, dass es sehr einfach möglich ist, Modelle, die verschiedenste Prozesse beschreiben, miteinander zu vereinen. Dies erlaubt es, komplexe biologische Phänomene, wie zum Beispiel Zellmotilität oder auch die kollektive Bewegung von Zellen, zu beschreiben. In den Modellen für Zellmotilität wird ein biologisches Netzwerk-Modell für GTPasen oder auch ein Active-Polar-Gel-Modell, das die Aktinfilamente im Inneren der Zellen als Flüssigkristall auffasst, mit dem Multi-Phasen-Modell kombiniert. Beide Modelle erlauben es, komplexe Vorgänge bei der selbst hervorgerufenen Bewegung von Zellen, wie das Vorantreiben der Zellmembran durch Aktinpolymerisierung oder auch die Kontraktionsbewegung des Zellkörpers durch kontraktile Spannungen innerhalb des Zytoskelets der Zelle, zu verstehen. Weiterhin ist die kollektive Bewegung von vielen Zellen von großem Interesse, da sich hier viele nichtlineare Phänomene zeigen. Um das Diffuse-Interface-Modell für eine Zelle auf die Beschreibung mehrerer Zellen zu übertragen, werden mehrere Phasenfelder eingeführt, die die Zellen jeweils kennzeichnen. Schließlich werden die Zellen durch ein lokales Abstoßungspotential gekoppelt. Das Modell wird angewendet, um White blood cell margination, das die Annäherung von Leukozyten an die Blutgefäßwand bezeichnet, zu verstehen. Dieser Prozess wird dabei bestimmt durch den komplexen Zusammenhang zwischen Kollisionen, den jeweiligen mechanischen Eigenschaften der Zellen, sowie deren Auftriebskraft innerhalb der Adern. Die Simulationen zeigen, dass diese Annäherung sich in bestimmten Gebieten des kardiovaskulären Systems stark vermindert, in denen die Blutströmung das Stokes-Regime verlässt. Schließlich wird das Active-Polar-Gel-Modell mit dem Modell für die kollektive Bewegung vom Zellen kombiniert. Dies macht es möglich, die kollektive Bewegung der Zellen und den Einfluss von Hydrodynamik auf diese Bewegung zu untersuchen. Es zeigt sich dabei, dass der Zustand der kollektiven gerichteten Bewegung sich spontan aus der Neuausrichtung der jeweiligen Zellen durch inelastische Kollisionen ergibt. Obwohl die Hydrodynamik einen großen Einfluss auf solche Systeme hat, deuten die Simulationen nicht daraufhin, dass Hydrodynamik die kollektive Bewegung vollständig unterdrückt. Weiterhin wird in dieser Arbeit gezeigt, wie die stark gekoppelten Systeme numerisch gelöst werden können mit Hilfe der Finiten-Elemente-Methode und wie die Effizienz der Methode gesteigert werden kann durch die Anwendung von Operator-Splitting-Techniken und Problemparallelisierung mittels OPENMP
Poon, Hao-chi Cynthia, i 潘顥之. "Numerical simulation of turbulent flow and microclimate within and above vegetation canopy". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B45589677.
Pełny tekst źródłaPettersson, Ulrika. "Blood Flow Regulation and Inflammatory Response in Experimental Models of Diabetes". Doctoral thesis, Uppsala universitet, Institutionen för medicinsk cellbiologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-161807.
Pełny tekst źródłaHiga, Mauricio. "Métodos para quantificação da artéria carótida em imagens de ultrassom modo-B e Doppler". Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-11082010-163813/.
Pełny tekst źródłaIn the field of image-based diagnostic medicine, low cost and noninvasive B-mode ultrasound technique have supported the researches which investigates the relation between the carotid intima-media thickness (IMT) and the development of cardiovascular diseases. Other ultrasound technique, that offers a different approach to study these diseases, is based on Doppler effect and has also been extensively used in clinical sites to measure blood velocity and flow in peripheral arteries. In this work, computational methods were implemented and analyzed to extract quantitative data from 2D images of arteries. Tests with B-mode images covered the combination of filtering techniques and active contour algorithms, in order to detect the arterial wall interfaces and to measure IMT and lumen diameter (LD). One mathematical model and seven real images of the common carotid artery were used in this study which, among several filters and algorithms combinations, showed similar quantitative results for DL measurements. However, for IMT, the small thickness of intima-media layer led to undesirable variation results. To measure blood velocity by using Doppler mode, a semi-automatic methodology was implemented in a computational tool to detect the spectrum envelope of the velocity graphic. A comparative analysis between commercial ultrasound systems operated by specialists and this tool included systolic peak velocities and velocity-time integral (VTI) of the common carotid and brachial arteries and of echocardiographic exams. Bland-Altmans analysis and the correlation coefficient validated this methodology which, besides the user friendly graphical interface of the tool, may help the clinicians for their large-scale studies based on Doppler ultrasound images, with the following advantages: to save operational time, to lower subjective results, and to support measurement reproducibility.
Rinaldi, Stephanie. "Experiments on the dynamics of cantilevered pipes subjected to internal andor external axial flow". Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=111615.
Pełny tekst źródłaPiechnik, Stefan K. "A mathematical and biophysical modelling of cerebral blood flow and cerebrospinal fluid dynamics". Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269226.
Pełny tekst źródłaYue, Yang, i 樂陽. "Spatial-temporal dependency of traffic flow and its implications for short-term traffic forecasting". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B35507366.
Pełny tekst źródłaWong, Chung-yin Philip, i 黃仲賢. "The development of pedestrian flow model". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B48194025.
Pełny tekst źródłapublished_or_final_version
Transport Policy and Planning
Master
Master of Arts in Transport Policy and Planning
Richard, Paul François. "A computer analysis of the flow of water and nutrients in agricultural soils as affected by subsurface drainage". Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/29171.
Pełny tekst źródłaScience, Faculty of
Resources, Environment and Sustainability (IRES), Institute for
Graduate
Brihi, Sarra. "Mathematical analysis and numerical approximation of flow models in porous media". Thesis, Normandie, 2018. http://www.theses.fr/2018NORMC263/document.
Pełny tekst źródłaThis thesis is devoted to Darcy Brinkman Forchheimer (DBF) equations with a non standard boundary conditions. We prove first the existence of different type of solutions (weak, strong) of the stationary DBF problem in a simply connected domain with boundary conditions on the normal component of the velocity field and the tangential component of the vorticity. Next, we consider Brinkman Forchheimer (BF) system with boundary conditions on the pressure in a non simply connected domain. We prove the well-posedness and the existence of a strong solution of this problem. We establish the regularity of the solution in the L^p spaces, for p >= 2.The approximation of the non stationary DBF problem is based on the pseudo-compressibility approach. The second order's error estimate is established in the case where the boundary conditions are of type Dirichlet or Navier. Finally, the finite elements Galerkin Discontinuous method is proposed and the convergence is settled concerning the linearized DBF problem and the non linear DBF system with a non standard boundary conditions
Khatibi, Rahman Haghi. "Mathematical open channel flow models and identification of their friction parameters". Thesis, University of London, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263145.
Pełny tekst źródłaLierkamp, Darren. "Simulating the effects of following distance on a high-flow freeway". Full text available online (restricted access), 2003. http://images.lib.monash.edu.au/ts/theses/Lierkamp.pdf.
Pełny tekst źródła