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Tesi sul tema "Nonlinear interfaces"

Autore: Grafiati
Pubblicato: 13 aprile 2024
Ultima modifica: 31 luglio 2025

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1

Poznic, Milan. "Nonlinear Interaction Between Ultrasonic Waves and Cracks and Interfaces." Doctoral thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4604.

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The subject of this thesis is the development of new ultrasound inspection techniques for detection of cracks that are smaller than the wavelength of the inspecting wave and the characterization of cracks in fluid-filled pipes as either surface-breaking or subsurface. The spectrum of the scattered field of a partially closed crack comprises harmonic components not expected to be found in the case of linear scatterers such as pores or inclusions. Paper A presents an experimental investigation into the linear reflection and generation of the 2nd harmonic component following the incidence of an u
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2

Poznić, Milan. "Interaction between ultrasonic waves and nonlinear cracks and interfaces /." Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4087.

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3

Poznić, Milan. "Nonlinear interaction between ultrasonic waves and cracks and interfaces /." Stockholm : Farkost- och flyg, Kungliga Tekniska högskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4604.

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4

Shelford, Leigh. "Ultrafast nonlinear optical studies of multilayered thin films and interfaces." Thesis, University of Exeter, 2009. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506859.

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5

Van, Wyck Neal Edward. "MULTIPHOTON SPECTROSCOPY OF THIN FILMS AND SURFACES (NONLINEAR, WAVEGUIDES, INTERFACES)." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/291294.

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6

Zeka, Donald. "Model reduction for nonlinear structural problems with multiple contact interfaces." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST102.

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Abstract (sommario):
Malgré les progrès continus en mécanique du contact, la simulation d'une structure complexe avec de multiples interfaces de contact frottant nécessite toujours un coût de calcul élevé en raison de multiples sources de nonlinéarité: évolution du statut de contact et de frottement, dissipation par frottement, grands glissements et grandes déformations. Cela peut induire des limitations pour les applications industrielles impliquant des matériaux architecturés tels que les câbles spiralés comportant de nombreux fils en contact, souvent utilisés en ingénierie offshore, ce qui a motivé ce travail.P
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7

Ojaghlou, Neda. "Adhesion at Solid/Liquid Interfaces." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/6079.

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The adhesion at solid/liquid interface plays a fundamental role in diverse fields and helps explain the structure and physical properties of interfaces, at the atomic scale, for example in catalysis, crystal growth, lubrication, electrochemistry, colloidal system, and in many biological reactions. Unraveling the atomic structure at the solid/liquid interface is, therefore, one of the major challenges facing the surface science today to understand the physical processes in the phenomena such as surface coating, self-cleaning, and oil recovery applications. In this thesis, a variety of theory/co
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8

Lombardi, Giulia. "Unified nonlinear electrical interfaces for hybrid piezoelectric-electromagnetic small-scale harvesting systems." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI101.

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Ce travail de recherche présente des interfaces électroniques non-linéaires pour des systèmes hybrides de récupération d'énergie combinant des transducteurs piézoélectriques et électromagnétiques. Ces systèmes ont reçu un grand intérêt en raison de leur capacité à convertir les vibrations mécaniques en énergie électrique suffisante pour alimenter des capteurs à faible puissance. Afin d'alimenter ces appareils microélectroniques, une fois l'énergie convertie, une extraction efficace et intelligente doit être mise en place avec une unité dédiée. Les interfaces hybrides non-linéaires proposées da
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9

Costard, Rene. "Ultrafast dynamics of phospholipid-water interfaces studied by nonlinear time-resolved vibrational spectroscopy." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2014. http://dx.doi.org/10.18452/16955.

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Geladene Phosphatgruppen sind von wesentlicher Bedeutung für die Hydratisierung von Phospholipiden und DNS. Hydratisierungshüllen spielen eine wichtige Rolle für die Ausbildung und Stabilisierung von Zellmembranen und der DNS-Doppelhelixstruktur. In dieser Arbeit werden elementare Phosphat-Wasser-Wechselwirkungen in einem Phospholidmodellsystem – sogenannten inversen Mizellen - mit variablen Wassergehalt zwischen einem und 16 Wassermolekülen pro Phospholipid untersucht. Die schnellsten Prozesse an den Grenzflächen wie z.B. Phosphat-Wasser-Wasserstoffbrückendynamik und Schwingungsenergieumverte
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10

RIZZOGLIO, FABIO. "Nonlinear dimensionality reduction for human movement analysis with application to body machine interfaces." Doctoral thesis, Università degli studi di Genova, 2021. http://hdl.handle.net/11567/1038287.

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For my PhD project, I set to explore how a nonlinear dimensionality reduction (DR) technique - autoencoder networks (AEs) - can identify low-dimensional latent manifolds of movement data. The thesis focuses on the application of this technique to body machine interfaces (BoMIs). I begin by comparing nonlinear AEs to Principal Component Analysis (PCA), a linear DR method, in capturing essential information of kinematic signals, including hand gestures and object manipulations, as well as electromyographic signals (EMG) obtained from unconstrained movements of shoulders and arms. AEs exhibited
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11

Aanensen, Nina Sasaki. "Nonlinear Laser-induced Deformations and Forces at Liquid-Liquid Interfaces near the critical Point." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for fysikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-14264.

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The theory of laser-induced liquid-liquid interface deformation has been presented and used to derive a differential equation describing the shape of the deformation. The differential equation has been investigated and solved numerically, and the results have been compared to the experimental results of the Bordeaux group. A model describing the maximum depth of the deformation based on the theory of a sphere in an electric field has also been investigated.The deformations from the numerical solutions of the differential equation are too wide compared to the experimental results. The shoulder-
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12

Barbano, Émerson Cristiano. "Third-harmonic generation at interfaces with femtosecond pulses: self-focusing contribution and nonlinear microscopy." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-20012017-154741/.

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Third-harmonic generation (THG) is a fundamental nonlinear optical process that has been used in different applications such as third-order nonlinear materials characterization and nonlinear microscopy. It is widely employed since the third-order nonlinearity is the most important in isotropic materials and THG occurs in all media regardless of symmetry. In the tightly focused laser beam condition THG is observed only at the materials interfaces, where the focal symmetry is broken due to the presence of two media with different refractive index and/or third-order susceptibilities. Measuring sl
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13

Yang, Dengliang. "Investigations of amino acid-based surfactants at liquid interfaces." Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/2689.

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Herein are presented collective studies of amino acid-based surfactants, also known as lipoamino acids, at liquid interfaces. Chapter III describes an investigation of domain morphology of N-Stearoylglutamic acid (N-SGA) Langmuir monolayers at the air/water interface by epifluorescence microscopy. Anisotropic feather-like domains were observed in L-enantiomeric monolayers while symmetric circular domains were found in racemic N-SGA monolayers. At a surface pressure of 30 mN/m the enantiomeric domains melted at 31 ??C while the racemic domains melted at 27 ??C. This result is exactly opposite
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14

WANG, JIH-FU TREVOR. "OPTICAL PROPERTIES OF Si-SiO2 INTERFACES BY LINEAR AND NONLINEAR OPTICAL TECHNIQUES." NCSU, 2002. http://www.lib.ncsu.edu/theses/available/etd-20020304-114240.

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<p>WANG, JIH-FU TREVOR. Optical Properties of Si-SiO Interfaces by Linear and Nonlinear Optical Techniques. ( Under the direction of Professor D. E. Aspnes. ) The objective of this research is to understand the physics of (001)Si-SiO data can be realized by the SBHM. From the SHG analysis we find effective angles of incidence and observation of about 12°, indicating that the SHG intensity originates at the Si side of the interface. This work further demonstrates the advantages of SBHM for interpreting SHG data with respect to conventional approaches. By expressing nonlinear polarizations in te
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15

Isaienko, Oleksandr. "Development of ultra-broadband ultrafast infrared sources and applications to nonlinear vibrational spectroscopy of interfaces." Diss., Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/141408.

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Chemistry<br>Ph.D.<br>Interfaces play a crucial role in the exchange of energy and matter in various physical, chemical and biological systems. A particular interest has been to study interfaces between aqueous phases and various minerals because of their importance in understanding geochemical phenomena as well as for applications such as enhanced oil recovery. The nonlinear optical technique of vibrational sum-frequency generation (SFG) spectroscopy, introduced over 20 years ago, has become a powerful tool to investigate various surfaces, in particular, mineral-water interfaces. One of the c
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16

Bao, Bin. "Distributed, broadband vibration control devices using nonlinear approaches." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI086/document.

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L’amélioration du confort des usagers ainsi que l’augmentation du niveau de sécurité des structures requièrent le développement de techniques permettant de limiter efficacement les vibrations. Dans cette optique, les travaux exposés ici proposent le développement et l’analyse de méthodes de contrôle vibratoire pour des structures de faibles dimensions et utilisant peu d’énergie. Afin de satisfaire à ces deux critères, il est ici proposé d’utiliser des éléments piézoélectriques électriquement interfacés de manière non-linéaire et périodiquement distribués sur la structure-cible à contrôler. Ain
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17

Yang, Yifan. "Modélisation numérique de l'amortissement induit par les interfaces des structures assemblées." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEC044/document.

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Déterminer la durée de vie d'une pièce sous excitation vibratoire est l'un des enjeux majeurs dans l'ingénierie mécanique. Afin de donner une estimation fiable de la durée de vie, un calcul correct de champ de contrainte, qui est fortement lié à la forme et l'amplitude modale est obligatoire. Cependant, le calcul de réponse d'une structure assemblée est difficile, surtout avec la présence de frottement sec aux interfaces de liaisons qui entraîne un amortissement non linéaire. La recherche de la thèse commence par une identification phénoménologique de l'amortissement induit par le frottement s
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18

Perry, Angela S. "A theoretical description of the vibrational sum frequency generation spectroscopy of interfaces." [Tampa, Fla.] : University of South Florida, 2005. http://purl.fcla.edu/fcla/etd/SFE0001252.

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19

Miles, Aaron R. "The effect of initial conditions on the nonlinear evolution of perturbed interfaces driven by strong blast waves." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1374.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2004.<br>Thesis research directed by: Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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20

Johnson, Magnus. "Vibrational Sum Frequency and Infrared Reflection/Absorption Spectroscopy Studies of the Air/Liquid and Liquid/Metal Interfaces." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-455.

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21

Green, Anthony. "Applications of Molecular Dynamics Techniques and Spectroscopic Theories to Aqueous Interfaces." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3457.

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The primary goal of spectroscopy is to obtain molecularly detailed information about the system under study. Sum frequency generation (SFG) vibrational spectroscopy is a nonlinear optical technique that is highly interface specific, and is therefore a powerful tool for understanding interfacial structure and dynamics. SFG is a second order, electronically nonresonant, polarization experiment and is consequently dipole forbidden in isotropic media such as a bulk liquid. Interfaces, however, serve to break the symmetry and produce a signal. Theoretical approximations to vibrational spectra of O-
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22

Beerman, Michael. "Transverse freezing of thin liquid films /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/10573.

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23

Mastricola, Nicholas Palma. "Nonlinear Stiffness and Edge Friction Characterization of Coned Disk Springs." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1480346443676492.

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24

Andersen, Audrée. "Surfactant dynamics at interfaces : a series of second harmonic generation experiments." Phd thesis, Universität Potsdam, 2005. http://opus.kobv.de/ubp/volltexte/2006/655/.

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Adsorption layers of soluble surfactants enable and govern a variety of phenomena in surface and colloidal sciences, such as foams. The ability of a surfactant solution to form wet foam lamellae is governed by the surface dilatational rheology. Only systems having a non-vanishing imaginary part in their surface dilatational modulus, E, are able to form wet foams. The aim of this thesis is to illuminate the dissipative processes that give rise to the imaginary part of the modulus. <br><br> There are two controversial models discussed in the literature. The reorientation model assumes that the
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25

Dianne, Soule Melissa C. Kido. "Nonlinear vibrational spectroscopic studies of the absorption and orientation of environmentally important molecules at the vapor/water interface /." view abstract or download file of text, 2007. http://proquest.umi.com/pqdweb?did=1335361671&sid=2&Fmt=2&clientId=11238&RQT=309&VName=PQD.

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Thesis (Ph. D.)--University of Oregon, 2007.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 146-156). Also available for download via the World Wide Web; free to University of Oregon users.
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26

Karami, Armine. "Study of electrical interfaces for electrostatic vibration energy harvesting." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS134/document.

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Les récupérateurs d'énergie vibratoire électrostatiques (REV) sont des systèmes convertissant une partie de l'énergie cinétique de leur environnement en énergie électrique, afin d'alimenter de petits systèmes électroniques. Les REV inertiels sont constituées d'un sous-système mécanique bâti autour d'une masse mobile, ainsi que d'une interface électrique. Ces deux blocs sont couplés par un transducteur électrostatique. Cette thèse étudie l'amélioration des performances des REV par la conception optimisée de leur interface électrique. La première partie de cette thèse étudie une famille d'interf
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27

Karami, Armine. "Study of electrical interfaces for electrostatic vibration energy harvesting." Electronic Thesis or Diss., Sorbonne université, 2018. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2018SORUS134.pdf.

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Les récupérateurs d'énergie vibratoire électrostatiques (REV) sont des systèmes convertissant une partie de l'énergie cinétique de leur environnement en énergie électrique, afin d'alimenter de petits systèmes électroniques. Les REV inertiels sont constituées d'un sous-système mécanique bâti autour d'une masse mobile, ainsi que d'une interface électrique. Ces deux blocs sont couplés par un transducteur électrostatique. Cette thèse étudie l'amélioration des performances des REV par la conception optimisée de leur interface électrique. La première partie de cette thèse étudie une famille d'interf
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28

Khan, Md Rubel. "Adsorption and Self-Assembly of Surfactants at Air-Liquid and Liquid-Metal Interfaces Studied by Sum Frequency Generation (SFG) Spectroscopy." Ohio University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1620212735093219.

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29

Khan, Md Rubel. "Adsorption and Self-Assembly of Surfactants at Air-Liquid and Liquid-Metal Interfaces Studied by Sum Frequency Generation (SFG) Spectroscopy." Ohio University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1620212735093219.

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30

Motti, Silvia Genaro. "Espectroscopia não linear de interfaces aplicada ao estudo de transistores poliméricos." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-20102014-130245/.

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O uso de materiais orgânicos em dispositivos eletrônicos, além de menor custo e facilidade de processamento, permite obter flexibilidade e transparência. Entretanto, para que a aplicação comercial desses materiais seja viável, os processos que ocorrem nos dispositivos ainda precisam ser mais bem compreendidos, visando maior eficiência e tempo de vida. É de grande importância o estudo das interfaces entre o semicondutor orgânico e os contatos metálicos, onde ocorre transferência de portadores de carga, e a interface com o dielétrico em transistores orgânicos (OFETs), onde se forma o canal de co
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31

Oiticica, Pedro Ramon Almeida. "Microscopia por geração de soma de frequências em interfaces líquidas e sólidas." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-13042015-112958/.

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Estudos em interfaces são importantes para o completo entendimento de muitos processos em química, física e biologia. Esses sistemas são governados principalmente pelas propriedades interfaciais dos materiais. Nas duas últimas décadas, o desenvolvimento de novos métodos experimentais melhorou o nosso entendimento das propriedades interfaciais. O advento de uma série de técnicas de espectroscopia a laser baseadas em óptica não linear e o desenvolvimento das técnicas de microscopia por ponta de prova, possibilitaram estudos antes inimagináveis em superfícies e interfaces. Entre as técnicas de es
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32

Costard, René [Verfasser], Thomas Akademischer Betreuer] Elsässer, Peter [Akademischer Betreuer] Hamm, and Oliver [Akademischer Betreuer] [Benson. "Ultrafast dynamics of phospholipid-water interfaces studied by nonlinear time-resolved vibrational spectroscopy / Rene Costard. Gutachter: Thomas Elsässer ; Peter Hamm ; Oliver Benson." Berlin : Humboldt Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2014. http://d-nb.info/1051371902/34.

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33

Nicola, Ernesto Miguel. "Interfaces between Competing Patterns in Reaction-diffusion Systems with Nonlocal Coupling." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2002. http://nbn-resolving.de/urn:nbn:de:swb:14-1036499969687-26395.

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In this thesis we investigate the formation of patterns in a simple activator-inhibitor model supplemented with an inhibitory nonlocal coupling term. This model exhibits a wave instability for slow inhibitor diffusion, while, for fast inhibitor diffusion, a Turing instability is found. For moderate values of the inhibitor diffusion these two instabilities occur simultaneously at a codimension-2 wave-Turing instability. We perform a weakly nonlinear analysis of the model in the neighbourhood of this codimension-2 instability. The resulting amplitude equations consist in a set of coupled Ginzbur
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34

Nicola, Ernesto Miguel. "Interfaces between Competing Patterns in Reaction-diffusion Systems with Nonlocal Coupling." Doctoral thesis, Technische Universität Dresden, 2001. https://tud.qucosa.de/id/qucosa%3A24181.

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Abstract (sommario):
In this thesis we investigate the formation of patterns in a simple activator-inhibitor model supplemented with an inhibitory nonlocal coupling term. This model exhibits a wave instability for slow inhibitor diffusion, while, for fast inhibitor diffusion, a Turing instability is found. For moderate values of the inhibitor diffusion these two instabilities occur simultaneously at a codimension-2 wave-Turing instability. We perform a weakly nonlinear analysis of the model in the neighbourhood of this codimension-2 instability. The resulting amplitude equations consist in a set of coupled Ginzbur
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35

FERHATOGLU, ERHAN. "Effects of non-unique friction forces on the dynamic behavior of turbine bladed disks with contact interfaces." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2967027.

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36

Morel, Adrien. "Interfaces électriques adaptatives dynamiquement au spectre fréquentiel pour la récupération d'énergie vibratoire large bande." Electronic Thesis or Diss., Chambéry, 2020. http://www.theses.fr/2020CHAMA035.

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La récupération d’énergie est un domaine émergent dont la visée principale est le développement de systèmes de capteurs autonomes énergétiquement, ne nécessitant pas de maintenance. La récupération de l’énergie contenue dans les vibrations ambiantes est d’un intérêt tout particulier lorsque le capteur à alimenter se trouve dans un environnement clos, confiné, où les gisements d’énergie solaire et les gradients thermiques ne sont pas suffisamment abondants. Cependant l’industrialisation et la mise sur le marché de récupérateurs d’énergie vibratoire sont freinées par la faible robustesse des réc
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37

Crémoux, Tatiana. "Physico-chimie aux interfaces de systèmes vitreux à charge d'espace." Thesis, Bordeaux 1, 2013. http://www.theses.fr/2013BOR14972/document.

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Le but de ce travail de thèse est de contrôler via un traitement de polarisation les propriétés physico-chimiques de surface des verres. Pour cela, l'implémentation d'une charge d'espace au sein de différents verres silicates et borosilicates a été caractérisée. Ces études comparatives ont montré que la déplétion des cations de l’anode vers la cathode induit l’apparition d’un champ électrique et des modifications structurales localisées. De plus, nous avons démontré que la formation d’un plasma entre l’anode et le verre pouvait être à l’origine de phénomènes d'échanges ioniques conduisant nota
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38

Salles, Loïc. "Etude de l'usure par fretting sous chargements dynamiques dans les interfaces frottantes : application aux pieds d'aubes de turbomachines." Phd thesis, Ecole Centrale de Lyon, 2010. http://tel.archives-ouvertes.fr/tel-00600613.

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Les parties tournantes des turbomachines aéronautiques sont composées d'une succession de roues aubagées qui permettent le transfert de l'énergie entre l'air et le rotor. Ces roues aubagées constituent des pièces particulièrement sensibles car elles doivent répondre en termes de dimensionnement à des impératifs de performances aérodynamiques, d'aéroacoustique et de tenue mécanique à la rotation,à la température et à la charge aérodynamique. Le contact avec frottement existant au niveau des attaches aube-disque joue un rôle important sur les niveaux vibratoires.Ce travail porte sur l'étude de l
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39

Maurice, Anthony. "Diffusion de second harmonique en milieux liquides : approche comparée des réponses de volume et de surface." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1337/document.

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Ce manuscrit décrit le processus optique non linéaire de Génération de Second Harmonique (acronyme anglais SHG pour Second Harmonic Generation) réalisé en phase liquide. En particulier, la propriété de cohérence de ce processus est étudiée en détail. En effet, en raison de la parité du processus SHG, cette cohérence est perdue dans les liquides. Ces études portent ainsi sur plusieurs géométries afin d’accéder aux réponses de volume et de surface. Les avantages d’une méthode combinée sont aussi discutés. Dans une première partie, la configuration classique de la Diffusion Hyper Rayleigh (acrony
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Gagliardi, Luca. "Modèle de film mince pour la croissance et la dissolution de cristaux confinées." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1211/document.

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Cette thèse traite de la modélisation de la croissance et de la dissolution de cristaux confinés. Nous nous concentrons sur la dynamique dans les contacts lubrifiés (ou hydrophiles) et dérivons un modèle de continu de couche mince prenant en compte la diffusion, la cinétique de surface, l’hydrodynamique, la tension de surface et les interactions avec le substrat (pression de disjonction). Premièrement, nous étudions la dissolution induite par une charge extérieure (dissolution sous contrainte). Nous trouvons que la forme fonctionnelle de la pression de disjonction -finie ou divergente au conta
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41

Aceves, Alejandro Borbolla. "Snell's laws at the interface between nonlinear dielectrics." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184467.

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A theory is presented which describes the global reflection and transmission characteristics of a self-focused channel propagating at an oblique angle of incidence to an interface separating two or more self-focusing nonlinear dielectric media. A complete characterization of the different behavior of the channel is given in the proper parameter space. In the dominant region, the nonlinear wavepacket representing the self-focused channel is represented as an equivalent particle moving in an equivalent potential. The dynamics of the particle is described by Newton's equations of motion, with the
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42

Monteiro, Eric. "Contributions aux méthodes numériques pour traiter les non linéarités et les discontinuités dans les matériaux hétérogènes." Phd thesis, Université Paris-Est, 2010. http://tel.archives-ouvertes.fr/tel-00601050.

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Motivé par l'étude de tissus biologiques, ce travail contribue aux développements d'outils numériques permettant de prédire la réponse mécanique de matériaux hétérogènes non linéaires dans lesquels les énergies d'interfaces deviennent prépondérantes. Ainsi, une méthode d'homogénéisation multi échelle combinée à une technique de réduction de modèle basée sur la décomposition orthogonale aux valeurs propres est proposée dans un cadre thermique et hyperélastique. Les énergies d'interfaces entre les différentes phases des composites sont décrites par un modèle d'interface cohérent et prises en com
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43

Li, Xiangwei. "Measuring friction at an interface using nonlinear ultrasonic response." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/22514/.

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Contacts of rough surfaces are present in almost all machines and mechanical components. Friction at the rough interface cause energy dissipation, wear and damage of surfaces. Engineers are interested in knowing the frictional conditions at contact interfaces. Despite friction being such a fundamental phenomenon, it is surprisingly difficult to measure reliably as results depend on the test method measurement environment. Methods have been developed to measure the friction and sliding contact tribometers are devised mostly in a laboratory environment. Their applications in measuring friction i
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44

Katsouli, Maria. "Seismic response of dam-foundation systems with nonlinear interface behavior." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61712.

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45

DANTAS, Henrique Cunha. "Brain-machine interface using nonlinear Kalman filters and channel selection." Programa de Pos Graduacao em Ciencia da Computacao, 2015. https://repositorio.ufpe.br/handle/123456789/14238.

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Submitted by Isaac Francisco de Souza Dias (isaac.souzadias@ufpe.br) on 2015-10-22T16:37:20Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação_Henrique_Dantas_2015.pdf: 1887462 bytes, checksum: 0e4a34db6ecb36db533670b19464128c (MD5)<br>Made available in DSpace on 2015-10-22T16:37:20Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação_Henrique_Dantas_2015.pdf: 1887462 bytes, checksum: 0e4a34db6ecb36db533670b19464128c (MD5) Previous issue date: 2015-06-26<br>CAPES<br>Th
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Varatharajah, Paramanathan. "Propagation of light beams at the interface separating nonlinear diffusive dielectrics." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185543.

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Diffusion effects on the stationary TE nonlinear surface waves and guided waves and the beam propagation characteristics at the interface separating two or more nonlinear diffusive Kerr-like media are studied extensively. The shape of the nonlinear surface and guided waves are computed for differing diffusion mechanisms and diffusion lengths. Stability of these waves is determined using the beam propagation method. The power and the shape of the nonlinear surface or guided waves are seen to be sensitive to the scaled diffusion length. However, many features including the stability criteria fro
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47

Thakore, Vaibhav. "Nonlinear dynamic modeling, simulation and characterization of the mesoscale neuron-electrode interface." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5529.

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Extracellular neuroelectronic interfacing has important applications in the fields of neural prosthetics, biological computation and whole-cell biosensing for drug screening and toxin detection. While the field of neuroelectronic interfacing holds great promise, the recording of high-fidelity signals from extracellular devices has long suffered from the problem of low signal-to-noise ratios and changes in signal shapes due to the presence of highly dispersive dielectric medium in the neuron-microelectrode cleft. This has made it difficult to correlate the extracellularly recorded signals with
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48

Ros, Ida. "NONLINEAR OPTICAL PROCESSES IN MOLECULAR SYSTEMS AT THE INTERFACE WITH METAL NANOSTRUCTURES." Doctoral thesis, Università degli studi di Padova, 2010. http://hdl.handle.net/11577/3427355.

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Surface plasmon excitations, i.e. collective oscillations of the conduction electrons, strongly influence the optical properties of metal nanostructures. Furthermore, under resonance conditions, a giant local electromagnetic field develops on the nanostructure surface. By controlling the size and shape of the nanostructures, it is possible to control the surface plasmon resonance frequency and so the frequency at which the local field will be amplified. If a molecule is located at the interface with metal nanostructures, its optical properties will be affected by the local field and can be enh
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49

Dinh, Anh thi. "Finite Element Methods for nonlinear interface problems. Application to a biofilm growth model". Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCD083.

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Un biofilm est un ensemble de micro-organismes tels que les bactéries, les champignons ou encore les algues qui vivent en communauté. Les biofilms ont la capacité d’être présents en tout lieu. Ils sont observés dans les milieux aqueux ou humides. Ils peuvent se développer sur n’importe quel type de surface naturelle ou artificielle,qu’elle soit minérale (roche, interfaces air-liquide...) ou organique (peau, tube digestif,racines et feuilles des plantes), industrielle (canalisations, coques des navires) ou médicale comme les prothèses et les cathéters. Cette ubiquité est à l’origine de nombreus
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Radhakrishnan, Vikram. "Cohesive zone modeling of the interface in linear and nonlinear carbon nano-composites." Cincinnati, Ohio : University of Cincinnati, 2008. http://rave.ohiolink.edu/etdc/view.cgi?acc_num=ucin1206453509.

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Thesis (M.S.)--University of Cincinnati, 2008.<br>Advisor: Kumar Vemaganti. Title from electronic thesis title page (viewed Feb.25, 2009). Includes abstract. Keywords: carbon nano-composites; cohesive zone modeling (CZM); interface; finite element analysis. Includes bibliographical references.
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