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Dissertations / Theses on the topic 'Electric waves Wave mechanics'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Franz, David, and University of Lethbridge Faculty of Arts and Science. "Turing patterns in linear chemical reaction systems with nonlinear cross diffusion." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2007, 2007. http://hdl.handle.net/10133/659.

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Turing patterns have been studied for over 50 years as a pattern forming mechanism. To date the current focus has been on the reaction mechanism, with little to no emphasis on the diffusion terms. This work focuses on combining the simplest reaction mechanism possible and the use of nonlinear cross diffusion to form Turing patterns. We start by using two methods of bifurcation analysis to show that our model can form a Turing instability. A diffusion model (along with some variants) is then presented along with the results of numerical simulations. Various tests on both the numerical methods a

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2

Smith, John Matthew Smith. "The Schrodinger Equation of a Particle in a Time Dependent Electric Field: Case Studies." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1532045633954294.

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3

Foster, David H. "Fabry-Perot and Whispering Gallery Modes In Realistic Resonator Models." Thesis, view abstract or download file of text, 2006. http://wwwlib.umi.com/cr/uoregon/fullcit?p3211216.

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Thesis (Ph. D.)--University of Oregon, 2006.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 204-213). Also available for download via the World Wide Web; free to University of Oregon users.

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4

Maurini, Corrado. "ELECTROMECHANICAL COUPLING OF DISTRIBUTED PIEZOELECTRIC TRANSDUCERS FOR PASSIVE DAMPING OF STRUCTURAL VIBRATIONS: COMPARISON OF NETWORK CONFIGURATIONS." Phd thesis, Virginia Tech, 2002. http://tel.archives-ouvertes.fr/tel-00994396.

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In this work passive piezoelectric devices for vibration damping are studied. It is developed the basic idea of synthesizing electrical wave guides to obtain an optimal electro-mechanical energy exchange and therefore to dissipate the mechanical vibrational energy in the electric form. Modular PiezoElectroMechanical (PEM) structures are constituted by continuous elastic beams (or bars) coupled, by means of an array of PZT transducers, to lumped dissipative electric networks. Both refined and homogenized models of those periodic systems are derived by an energetic approach based on the principl

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5

Kamenskihs, Vsevolods. "Effect of an axial electric field on detonation waves." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104677.

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The present thesis reports an investigation of the effects of an axial electric field (200V/cm – 8000V/cm) on the propagation of detonation waves in mixtures of 2CO+O₂ and C₂H₂+O₂+85%Ar. High speed streak camera together with photodiodes was used for detonation velocity and position measurements. Additionally, the voltage across the axial electrodes and the current in the field circuit were also monitored as the detonation traversed the electric field region. The experimental results show that the charged particles within the detonation reaction zone are attracted to the surface of the electro

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6

Ayanle, Hassan Shiekh-Ali. "Mode competition in cross-waves." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184872.

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Cross-waves generated by an oscillating wavemaker in a rectangular wave tank are examined when two or more modes are simultaneously unstable. The partial differential equations governing the evolution of the complex amplitude of inviscid cross-waves are shown to be two coupled nonlinear Schrodinger equations with transverse modulations. Energy dissipation in the system is taken into account by the inclusion of a linear viscous damping term into the amplitude equations. A linearized stability analysis is performed on these equations to determine the critical modes, the growth rates and the stab

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7

Kwok, Loong-Piu. "Viscous cross-waves: Stability and bifurcation." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184441.

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In the first part of this thesis, the nonlinear Schrodinger equation for inviscid cross-waves near onset is found to be modified by viscous linear damping and detuning. The accompanying boundary condition at the wavemaker is also modified by damping from the wavemaker meniscus. The relative contributions of the free-surface, sidewalls, bottom, and wavemaker viscous boundary layers are computed. It is shown that viscous dissipation due to the wavemaker meniscus breaks the symmetry of the neutral curve. In the second part, existence and stability of steady solutions to the nonlinear Schrodinger

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8

Skryabin, Dmitry Vladimirovich. "Modulational instability of optical solitary waves." Thesis, University of Strathclyde, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366995.

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9

Kil, Hyun-Gwon. "Propagation of elastic waves on thin-walled circular cylinders." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/15967.

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10

Dong, Xiaobo. "Characterization of soil behavior using electromagnetic wave-based technique /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202006%20DONG.

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11

Cornett, Andrew Malcolm. "Short-crested wave forces on a rigid segmented vertical cylinder." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26688.

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This thesis investigates water particle kinematics and the wave forces exerted on a slender rigid vertical cylinder in regular bidirectional wave fields. The instrumented portion of this cylinder is partitioned into nine independent segments enabling measurement of the vertical profile of hydrodynamic loading both in-line and transverse to the direction of wave propagation. Experiments conducted at the Hydraulics Laboratory of the National Research Council in Ottawa are described and some results are compared with the predictions of a wave force model based on the Morison equation and linear

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12

Rubbo, Louis Joseph. "Gravitational wave astronomy using spaceborne detectors." Diss., Montana State University, 2004. http://etd.lib.montana.edu/etd/2004/rubbo/RubboL0805.pdf.

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13

Murad, Noor Asniza. "Micromachined millimeter wave circuits." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/1649/.

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This thesis presents the design and characterisation of millimetre-wave Butler matrix beamforming circuits at 63 GHz. A micromachining technique is used to fabricate the tiny structures. The ability to manufacture the circuits at this frequency may benefit to the development of intelligent transport system (ITS) communication and sensing systems. All components that build the Butler matrix beamformer are designed to fit the thick SU-8 photoresist micromachining technology, where structures are built by bonding together five layers of metal coated SU-8. The matrix is constructed using air fille

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14

Poon, Chun-Kin. "Numerical simulation of coupled long wave-short wave system with a mismatch in group velocities." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B35381334.

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15

Katsidoniotaki, Eirini. "Extreme wave conditions and the impact on wave energy converters." Licentiate thesis, Uppsala universitet, Elektricitetslära, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-441043.

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The amount of energy enclosed in ocean waves has been classified as one of the most promising renewable energy sources. Nowadays, different wave energy conversion (WEC) systems are being investigated, but only a few concepts have been operated in a sea environment. One of the largest challenges is to guarantee the offshore survivability of the devices in extreme wave conditions. However, there are large uncertainties related to the prediction of extreme wave loads on WECs. Highfidelity computational fluid dynamics (CFD) simulations can resolve nonlinear hydrodynamic effects associated with wa

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16

Prakash, Hemanth. "The Active Wave-front Sampling based 3D endoscope." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/38703.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.<br>Includes bibliographical references (leaves 109-113).<br>This thesis investigates the potential of Active Wave-front Sampling (AWS) for real time quantified 3D endoscopy. AWS is a technique by which phase information from an aperture area of a lens is obtained by sampling sub-regions of the aperture area in time. The resulting phase information is then processed to obtain an accurate 3D measure

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17

Goldberg, Benjamin M. "Electric Field Measurements in Non-Equilibrium ElectricDischarge Plasmas Using Picosecond Four-Wave Mixing." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449236861.

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18

Li, Dongli. "Computational and experimental study of shock wave interactions with cells." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:38beffe8-06c9-4b49-89f8-f5318c527800.

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This thesis presents a combined numerical and experimental study on the response of kidney cells to shock waves. The motivation was to develop a mechanistic model of cell deformation in order to improve the clinical use of shock waves, by either enhancing their therapeutic action against target cells or minimising their impact on healthy cells. An ultra-high speed camera was used to visualise individual cells, embedded in tissue-mimicking gel, in order to measure their deformation when subject to a shock wave from a clinical shock wave source. Advanced image processing was employed to extract

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19

Poon, Chun-Kin, and 潘俊健. "Numerical simulation of coupled long wave-short wave system with a mismatch in group velocities." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B35381334.

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20

Li, Guojing. "Development of a wireless instrumented projectile for impact testing based on elastic wave reduction." Diss., Connect to online resource - MSU authorized users, 2008.

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21

Gan, Tian S. M. Massachusetts Institute of Technology. "Design and fabrication of granular materials for surface acoustic waves." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100133.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.<br>Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 134-147).<br>Granular materials with structural discreteness and periodicity can lead to novel propagation behaviors of mechanical waves. Acoustic studies of granular media typically involve macroscopic particles whereas contact-based vibrations of microparticles remain largely unexplored. The

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22

Barnard, Jonathan Simon. "Waves or particles? : a study of semiconductor interfaces using energy filtered transmission electron microscopy and electron holography." Thesis, University of Bristol, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299327.

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23

Pack, Jeong-Ki. "A wave-kinetic numerical method for the propagation of optical waves." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/104527.

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24

Joubert, James Rattray. "Design and development of a novel wave energy converter." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85817.

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Thesis (PhD)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: The design, development and evaluation of a novel wave energy converter (WEC) device, called the ShoreSWEC, in a South African port development is presented. Based on the device requirements, site selection criteria were specified and applied to identify a suitable deployment location. A wave modeling procedure was developed to determine the operational wave conditions and available wave power resource at the selected location. The site was found to have a low mean annual average resource of approximately 2.3 kilowatt per

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25

Salles, Paulo Afonso de Almeida. "Eddy viscosity models for pure waves over large roughness elements." Thesis, Online version, 1997. http://hdl.handle.net/1912/3042.

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26

Hope, Sarah A. "Arterial pressure waves : waveform characteristics, their associations and factors influencing their propagation." Monash University, Faculty of Medicine, Nursing and Health Sciences, 2003. http://arrow.monash.edu.au/hdl/1959.1/5566.

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27

van, den Bremer T. S. "The induced mean flow of surface, internal and interfacial gravity wave groups." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:e735afe7-a77d-455d-a560-e869a9941f69.

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Although the leading-order motion of waves is periodic - in other words backwards and forwards - many types of waves including those driven by gravity induce a mean flow as a higher-order effect. It is the induced mean flow of three types of gravity waves that this thesis examines: surface (part I), internal (part II) and interfacial gravity waves (part III). In particular, this thesis examines wave groups. Because they transport energy, momentum and other tracers, wave-induced mean flows have important consequences for climate, environment, air traffic, fisheries, offshore oil and other indus

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28

Oh, Yoonchan. "Multi-physics investigation on the failure mechanism and short-time scale wave motion in flip-chip configuration." Texas A&M University, 2004. http://hdl.handle.net/1969.1/2719.

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The demands for higher clock speeds and larger current magnitude in high-performance flip-chip electronic packaging configurations of small footprint have inevitably raised the concern over rapid thermal transients and large thermal spatial gradients that could severely compromise package performance. Coupled electrical-thermal-mechanical multi-physics were explored to evaluate the concern and to establish the knowledge base necessary for improving flip-chip reliability. It was found that within the first few hundred nanoseconds upon power-on, there were fast attenuating, dispersive shock wa

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29

Nagaraj, Mahavir. "Short time scale thermal mechanical shock wave propagation in high performance microelectronic packaging configuration." Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/1087.

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The generalized theory of thermoelasticity was employed to characterize the coupled thermal and mechanical wave propagation in high performance microelectronic packages. Application of a Gaussian heat source of spectral profile similar to high performance devices was shown to induce rapid thermal and mechanical transient phenomena. The stresses and temporal gradient of stresses (power density) induced by the thermal and mechanical disturbances were analyzed using the Gabor Wavelet Transform (GWT). The arrival time of frequency components and their magnitude was studied at various locations i

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30

Bourquin, Yannyk Parulian Julian. "Shaping surface waves for diagnostics." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/4167/.

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Infectious diseases continue to kill millions of people every year and are a significant burden on the socio-economic development of developing countries. After many years of international policy aimed at containing diseases, it has recently become an explicit aim to move towards elimination of infectious diseases. However, if this is to occur, it will be necessary to have highly eficacious diagnostic tools to ensure infected individuals are identified and treated. However, the diagnosis of infectious diseases in the developed and developing world requires the full integration of complex assay

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31

Yoon, Sungsoo. "Array-Based Measurements of Surface Wave Dispersion and Attenuation Using Frequency-Wavenumber Analysis." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7246.

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Surface wave methods have been used to determine dynamic properties of near-surface soils in geotechnical engineering for the past 50 years. Although the capabilities of engineering surface wave methods have improved in recent years due to several advances, several issues including (1) near-field effects, (2) combined active and passive measurements, and (3) accurate measurements of surface wave attenuation still require study to further improve the capabilities of modern surface wave methods. Near-field effects have been studied for traditional surface wave methods with two receivers and sev

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32

Gamble, Stephanie Nicole. "Conical Intersections and Avoided Crossings of Electronic Energy Levels." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/101899.

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We study the unique phenomena which occur in certain systems characterized by the crossing or avoided crossing of two electronic eigenvalues. First, an example problem will be investigated for a given Hamiltonian resulting in a codimension 1 crossing by implementing results by Hagedorn from 1994. Then we perturb the Hamiltonian to study the system for the corresponding avoided crossing by implementing results by Hagedorn and Joye from 1998. The results from these demonstrate the behavior which occurs at a codimension 1 crossing and avoided crossing and illustrates the differences. These soluti

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33

Mahler, Andrew. "The One Electron Basis Set: Challenges in Wavefunction and Electron Density Calculations." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc849642/.

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In the exploration of chemical systems through quantum mechanics, accurate treatment of the electron wavefunction, and the related electron density, is fundamental to extracting information concerning properties of a system. This work examines challenges in achieving accurate chemical information through manipulation of the one-electron basis set.

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34

Lehmann, Lutz. "Wave propagation in infinite domains : with applications to structure interaction /." Berlin [u.a.] : Springer, 2007. http://www.gbv.de/dms/bs/toc/523903820.pdf.

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35

Stuart, Duncan Charles Alistair. "Characterizing long wave agitation in the port of Ngqura using a Boussinesq wave model." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85567.

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Thesis (MScEng)-- Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: The port of Ngqura is situated on the east coast of South Africa. Since its first operational winter excessive vessel motions have interrupted container shipping operations and lead to mooring line failure. A major component contributing to the excessive motions is the presence of seiching in the port, resonating long waves. This study investigates the long wave generation, penetration into the port and subsequent resonance in the vicinity of the problem berths. An extensive literature review identified two predominant

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36

Roe, Austin R. "RESONANT ACOUSTIC WAVE ASSISTED SPIN-TRANSFER-TORQUE SWITCHING OF NANOMAGNETS." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/6029.

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We studied the possibility of achieving an order of magnitude reduction in the energy dissipation needed to write bits in perpendicular magnetic tunnel junctions (p-MTJs) by simulating the magnetization dynamics under a combination of resonant surface acoustic waves (r-SAW) and spin-transfer-torque (STT). The magnetization dynamics were simulated using the Landau-Lifshitz-Gilbert equation under macrospin assumption with the inclusion of thermal noise. We studied such r-SAW assisted STT switching of nanomagnets for both in-plane elliptical and circular perpendicular magnetic anisotropy (PMA) na

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37

Siddorn, Philip David. "Efficient numerical modelling of wave-structure interaction." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:de36bd2f-cd23-4f11-b67f-9d8cd48ecd3c.

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Offshore structures are required to survive in extreme wave environments. Historically, the design of these offshore structures and vessels has relied on wave-tank experiments and linear theory. Today, with advances in computing power, it is becoming feasible to supplement these methods of analysis with fully nonlinear numerical simulation. This thesis is concerned with the development of an efficient method to perform this numerical modelling, in the context of potential flow theory. The interaction of a steep ocean wave with a floating body involves a moving free surface and a wide range of

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38

Mueller, Jerel Keith. "Advancing Transcranial Focused Ultrasound for Noninvasive Neuromodulation of Human Cortex." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/56578.

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Ultrasound waves are mechanical undulations above the threshold for human hearing, and have been used widely in both the human body and brain for diagnostic and therapeutic purposes. Ultrasound can be controlled using specially designed transducers into a focus of a few millimeters in diameter. Low intensity ultrasound, such as used in imaging applications, appears to be safe in adults. It is also known that ultrasound waves can penetrate through the skull and be focused within the brain for ablation purposes, employing the heat generation properties of high intensity focused ultrasound. High

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39

Ghodrati, Ashkan, and Ahmed Rashid. "Modelling and Simulation of a Power Take-off in Connection with Multiple Wave Energy Converters." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3396.

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The objective of this thesis is to develop a model that will integrate multiple buoys to a power take-off hub. The model will be derived using a time domain analysis and will consider the hydraulic coupling of the buoys and the power take-off. The derived model is reproduced in MATLAB in order to run simulations. This will give possibility to conduct a parameter study and evaluate the performance of the system. The buoy simulation model is provided by Wave4Power (W4P). It consists of a floater that is rigidly connected to a fully submerged vertical (acceleration) tube open at both ends. The tu

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40

McCorkle, Tricia Dawn. "Math, music, and membranes: A historical survey of the question "can one hear the shape of a drum"?" CSUSB ScholarWorks, 2005. https://scholarworks.lib.csusb.edu/etd-project/2933.

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In 1966 Mark Kac posed an interesting question regarding vibrating membranes and the sounds they make. His article entitled "Can One Hear the Shape of a Drum?", which appeared in The American Mathematical Monthly, generated much interest and scholarly debate. The evolution of Kac's intriguing question will be the subject of this project.

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41

Bedford, Adam. "Strength in flexibility : research into innovative flexible bearing designs for wave convertor permanent magnet generators." Thesis, Lancaster University, 2011. http://clok.uclan.ac.uk/4192/.

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Originally this research was to investigate the use of hydrostatic bearings in large linear machines, such as linear generators, and determine their viability in a power generation context. It quickly became clear that it was possible to make hydro-static bearings viable, however the methods employed to do so gave rise to new possibilities which altered the scope of the research. The overall aim of the research has become to look at flexible construction, using modular generation units, as a means of creating more reliable and cost effective generators. The methods employed to do this involved

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Kedia, Sunny. "Optical Communication Using Hybrid Micro Electro Mechanical Structures (MEMS) and Commercial Corner Cube Retroreflector (CCR)." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5969.

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This dissertation presents a free-space, long-range, passive optical communication system that uses electrostatically modulated microelectromechanical systems (MEMS) structures coupled with a glass total internal reflection (TIR)-type corner cube retroreflector (CCR) as a non-emitting data transmitter. A CCR consists of three mirrors orthogonal to each other, so that the incident beam is reflected back to the incident beam, source. The operational concept is to have a MEMS modulator fusion with TIR CCR, such that the modulators are working periodically to disrupt the evanescent waves at the ai

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43

Khan, Muhammad Ahsan. "CFD Applications for Wave Energy Conversion Devices (MoonWEC) and Turbulent Fountains for Environmental Fluid Mechanics." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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This thesis is based on two studies that are related to floating wave energy conversion (WEC) devices and turbulent fountains. The ability of the open-source CFD software OpenFOAM® has been studied to simulate these phenomena. The CFD model has been compared with the physical experimental results. The first study presents a model of a WEC device, called MoonWEC, which is patented by the University of Bologna. The CFD model of the MoonWEC under the action of waves has been simulated using OpenFOAM and the results are promising. The reliability of the CFD model is confirmed by the laboratory ex

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Du, Xinpeng. "Laser-Ultrasonic Measurement of Single-Crystal Elastic Constants from Polycrystalline Samples by Measuring and Modeling Surface Acoustic Wave Velocities." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524177819455643.

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Renaud, Antoine. "On wave-mean flow interactions in stratified fluid." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEN059/document.

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La dynamique des écoulements géophysiques planétaires est fortement influencée par des processus physiques souvent non résolus par les modèles numériques de circulation générale. Il est essentiel de comprendre les mécanismes physiques sous-jacents pour paramétrer l’effet des petites échelles sur les grandes. Dans cette thèse, nous étudions un problème emblématique d’interactions entre ondes et écoulements moyens : la dynamique des écoulements zonaux forces par des ondes internes de gravite. Une manifestation remarquable de ces interactions est l’oscillation quasi-biennale (QBO) des vents équat

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46

Kasap, Keskin Ozlem. "Monitoring The Development Of Properties In Fresh Cement Paste And Mortar By Ultrasonic Waves." Phd thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610367/index.pdf.

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The determination and following up the development of properties during the fresh state and early ages of concrete are important in order to schedule the work and to obtain the desired properties in the hardened concrete. As the traditional methods such as Vicat and Penetrometer mostly depend on the experience of the operator and do not provide a continuous picture of the development of properties, reliable and objective non-destructive test methods are needed for the quality control of fresh concrete. The purpose of this thesis is to observe the development of properties of fresh pastes and

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47

Baghalian, Amin. "Detecting Structural Defects Using Novel Smart Sensory and Sensor-less Approaches." FIU Digital Commons, 2017. https://digitalcommons.fiu.edu/etd/3560.

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Monitoring the mechanical integrity of critical structures is extremely important, as mechanical defects can potentially have adverse impacts on their safe operability throughout their service life. Structural defects can be detected by using active structural health monitoring (SHM) approaches, in which a given structure is excited with harmonic mechanical waves generated by actuators. The response of the structure is then collected using sensor(s) and is analyzed for possible defects, with various active SHM approaches available for analyzing the response of a structure to single- or multi-f

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48

Barclay, Graeme James. "Instabilities in liquid crystals." Thesis, University of Strathclyde, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366797.

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Bessière, Francis. "Amélioration des techniques d’ablation pour le traitement des arythmies cardiaques : nouvelles modalités diagnostiques et thérapeutiques par ultrasons." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1225/document.

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A la croisée des chemins entre médecine et physique des ultrasons, ce travail de thèse s’est intéressé à l’apport de solutions diagnostiques et de thérapeutiques novatrices dans le domaine de l’électrophysiologie cardiaque. Un système capable de délivrer des ultrasons focalisés dans le cœur par voie transoesophagienne sous guidage par ultrasons a été développé et testé in vivo chez 6 porcs. Les tirs HIFU ont été délivrés sur les oreillettes et les ventricules. Lors de l'autopsie, une analyse visuelle a démontré la présence de lésions thermiques dans les zones ciblées chez 3 animaux. Ces lésion

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Gower, Artur Lewis. "Elasticidade não linear com simetria radial para materiais pré-esticados." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/307615.

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Orientador: Lúcio Tunes dos Santos<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matemática, Estatística e Computação Científica<br>Made available in DSpace on 2018-08-18T19:22:30Z (GMT). No. of bitstreams: 1 Gower_ArturLewis_M.pdf: 2962671 bytes, checksum: 60eacb0b1c81be752469204420ce44d3 (MD5) Previous issue date: 2011<br>Resumo: Nesta tese expomos uma investigação qualitativa e quantitativa sobre a propagação de ondas com simetria radial em materiais elásticos pré-esticados, isotrópicos e homogêneos. Esse tipo de modelo se aproxima a uma explosão em um sólido

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