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Dissertations / Theses on the topic 'Interface Problem'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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1

Natroshvili, David, and Shota Zazashvili. "The Interface Crack Problem for Anisotropic Bodies." Universitätsbibliothek Chemnitz, 1998. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-199800979.

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The two-dimensional interface crack problem is investigated for anisotropic bodies in the Comninou formulation. It is established that, as in the isotropic case, properly incorporating contact zones at the crack tips avoids contradictions connected with the oscillating asymptotic behaviour of physical and mechanical characteristics leading to the overlapping of material. Applying the special integral representation formulae for the displacement field the problem in question is reduced to the scalar singular integral equation with the index equal to -1. The analysis of this equation is given.

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2

Abdullah, Abdul H. "Accessing networked services : a user interface design problem." Thesis, Aston University, 1994. http://publications.aston.ac.uk/10669/.

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This research investigates the general user interface problems in using networked services. Some of the problems are: users have to recall machine names and procedures to. invoke networked services; interactions with some of the services are by means of menu-based interfaces which are quite cumbersome to use; inconsistencies exist between the interfaces for different services because they were developed independently. These problems have to be removed so that users can use the services effectively. A prototype system has been developed to help users interact with networked services. This consi

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Wasyk, Rebecca Dawn. "Numerical Solution of a Transmission Problem with Prefractal Interface." Digital WPI, 2007. https://digitalcommons.wpi.edu/etd-dissertations/407.

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"Certain physical problems in electrostatics, magnetostatics, and heat transfer give rise to elliptic boundary value problems with transmission conditions on a layer. We focus on a particular problem with a second order transmission condition, representing an infinitely conductive layer. To approximate irregular layers that may naturally arise, a sequence of layers that converge to the fractal von Koch curve is considered. The solution to this transmission problem with a prefractal layer exhibits singularities due to the transmission condition across the layer as well as the reentrant corners

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4

MONTEIRO, Milson Silva. "INTERFACE DE ANÁLISE DA INTERCONEXÃO EM UMA LAN USANDO CORBA." Universidade Federal do Maranhão, 2002. http://tedebc.ufma.br:8080/jspui/handle/tede/311.

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Made available in DSpace on 2016-08-17T14:52:43Z (GMT). No. of bitstreams: 1 Milson Monteiro.pdf: 1924077 bytes, checksum: 78f931b493f756dec0edee7a465e1099 (MD5) Previous issue date: 2002-06-07<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>This works concern software development (graphical user interface) that makes possible to analyze the interconnection in a LAN (Local Area Network) using CORBA (Common Object Request Broker Architecture) on distributed and heterogeneous environment among several outlying machines. This works presents paradigms of graphs theory: shor

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Ağıroğlu, İzzet Onur Tanoğlu Gamze. "An application of the finite differences method to a dynamical interface problem/." [s.l.]: [s.n.], 2004. http://library.iyte.edu.tr/tezler/master/matematik/T000445.pdf.

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6

Camp, Brian David. "A Class of Immersed Finite Element Spaces and Their Application to Forward and Inverse Interface Problems." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/29923.

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A class of immersed finite element (IFE) spaces is developed for solving elliptic boundary value problems that have interfaces. IFE spaces are finite element approximation spaces which are based upon meshes that can be independent of interfaces in the domain. Three different quadratic IFE spaces and their related biquadratic IFE spaces are introduced here for the purposes of solving both forward and inverse elliptic interface problems in 1D and 2D. These different spaces are constructed by (i) using a hierarchical approach, (ii) imposing extra continuity requirements or (iii) using a local r

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Stilson, Mona T. "Multi-UAV Control: An Envisioned World Design Problem." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1245640561.

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8

Walter, Alexander I. "Embedding transdisciplinary research : interface requirements for joint problem solving between scientists and stakeholders /." Zürich : ETH, 2006. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16938.

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Farenzena, Daniel Scain. "The cost of search and evaluation in problem-solving social networks : an experimental study." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/148280.

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Online networks of individuals have been used to solve a number of problems in a scale that would not be possible if not within a connected, virtual and social environment such as the internet. However, the quality of solutions provided by individuals of an online network can vary significantly thus making work quality unreliable. This dissertation investigates factors that can influence the quality of the work output of individuals in online social networks. Specifically, we show that when solving tasks with small duration (under 5 minutes), also known as microtasks, individuals decision maki

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10

Keenan, Susan Lynn. "Product usability and process improvement based on usability problem classification." Diss., Virginia Tech, 1996. http://hdl.handle.net/10919/39100.

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Although research and practice have shown that the success of a usability engineering program depends on the identification and correction of usability problems, these problems remain an underutilized source of information. Insufficient guidance regarding the capture of usability problem data results in the loss of information during the problem reporting phase as problem reports are often vague, imprecise, and incomplete. In addition, the absence of a framework for understanding, comparing, categorizing, and analyzing those problems, and their relationship to development context, not only con

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11

Brooks, H. M. "An intelligent interface for document retrieval systems : Developing the problem description and retrieval strategy components." Thesis, City University London, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373324.

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12

Mishra, Dhananjay. "Integration of Graphical User Interface and Data Visualization Tools in a Problem Solving Environment for Wireless System Design." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/9773.

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This thesis describes user interface and visualization components in the problem solving environment "Site-Specific System Simulator for Wireless System Design" (S4W) developed by CS and ECE faculty and students at Virginia Tech. S4W integrates visualization and computational tools with a high level user interface. The objective of this PSE is to improve the ability of wireless design engineers to design an indoor wireless system through the aid of various simulation and visualization components. S4W provides engineers with the facility of thinking in terms of the overall task of designing the

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Brown, Abbe. "A legal solution to a real problem : the interface between intellectual property, competition and human rights." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/3243.

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This thesis argues that the existing laws of competition and human rights can be combined to limit the rights of owners of intellectual property (IP). The need for this thesis arises from concerns about the impact of enforcement of IP rights, say on patients needing essential medicines or students seeking to obtain important material from the internet. Some steps have been taken to address these concerns, with the World Trade Organization Doha Declaration on the TRIPS Agreement and Public Health and the One Lap Top Per Child project. Yet the owner of a national IP right can still object to a v

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Beato, Marina João Pelúcia. "A obra de arte na interface do processo criativo e do processo tecnológico." Master's thesis, Escola Superior de Educação, Instituto Politécnico de Setúbal, 2012. http://hdl.handle.net/10400.26/5885.

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Mestrado em Ensino de Educação Visual e Tecnológica no Ensino Básico<br>O presente estudo pretende refletir sobre uma metodologia aplicada na escola, em contexto de sala de aula, mais especificamente na disciplina de Educação Tecnológica. Procura-se perceber como é que a obra de José de Guimarães poderá contribuir para o desenvolvimento da criatividade e das aptidões técnicas dos alunos do terceiro ciclo do ensino básico. Pretende-se com esta proposta de intervenção pedagógica que os alunos, através do contacto com obras de arte de José de Guimarães e da aplicação do método de resolução de pr

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Wang, Tzin Shaun. "A Hermite Cubic Immersed Finite Element Space for Beam Design Problems." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/32911.

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This thesis develops an immersed finite element (IFE) space for numerical simulations arising from beam design with multiple materials. This IFE space is based upon meshes that can be independent of interface of the materials used to form a beam. Both the forward and inverse problems associated with the beam equation are considered. The order of accuracy of this IFE space is numerically investigated from the point of view of both the interpolation and finite element solution of the interface boundary value problems. Both single and multiple interfaces are considered in our numerical simulation

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Donahue, Thomas J. "What's Closeness got to do with it? Investigating the Effects of Interface Closeness on Abstract Problem Solving and Learning." Bowling Green State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1342477759.

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Ocampo, Daniel Morin. "A RESOLUÇÃO DE PROBLEMAS COMO UMA INTERFACE INTERDISCIPLINAR ENTRE A MATEMÁTICA E O ENSINO DE CIÊNCIAS." Universidade Federal de Santa Maria, 2015. http://repositorio.ufsm.br/handle/1/6693.

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Fundação de Amparo a Pesquisa no Estado do Rio Grande do Sul<br>There are many challenges to the teaching of science and mathematics, particularly in an interdisciplinary perspective that enables the integration of objectives, methodologies and knowledge of the areas of natural science and mathematics. Understanding this difficulty, we seek to examine in this study the impact on teaching practice math teachers, continued formation focusing on problem solving as an interdisciplinary interface between mathematics and science teaching. For this, we count on the collaboration of teachers in the pu

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18

Bhoot, Satbinder Singh. "A problem at the manufacturing marketing interface : customer scheduling for a sales force in the industrial market sector." Thesis, University of Manchester, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247060.

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Chaabane, Nabil. "Immersed and Discontinuous Finite Element Methods." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/73194.

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In this dissertation we prove the superconvergence of the minimal-dissipation local discontinuous Galerkin method for elliptic problems and construct optimal immersed finite element approximations and discontinuous immersed finite element methods for the Stokes interface problem. In the first part we present an error analysis for the minimal dissipation local discontinuous Galerkin method applied to a model elliptic problem on Cartesian meshes when polynomials of degree at most $k$ and an appropriate approximation of the boundary condition are used. This special approximation allows us to ach

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Werbeck, Kai-Uwe Langston Richard. "The interface as door on the problem of access to the image in Kafka's Das Schloss and interactive media /." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2008. http://dc.lib.unc.edu/u?/etd,1706.

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Thesis (M.A.)--University of North Carolina at Chapel Hill, 2008.<br>Title from electronic title page (viewed Sep. 16, 2008). "... in partial fulfillment of the requirements for the degree of Master of Arts in the department of Germanic Languages and Literatures." Discipline: Germanic Languages; Department/School: Germanic Languages.

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Nicholson, Lynda. "Picking up the pieces : (re)framing the problem of marriage breakdown in the British Armed Forces." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6343.

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This thesis examines the issue of marriage breakdown in the British Armed Forces in light of claims that rates are double that of the civilian population. The research is situated within the context of existing research on the relationship between the service family and the military organisation. This thesis is distinctive in that it employs Bacchi's (1999) method of critical analysis to problem framing in Governmental policy and existing discourses on service families. The objective is to show how the impact of military demands on marriage and family life are framed by the media, politicians,

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Yang, Xingzhou. "Immersed Interface Method for Elasticity Problems with Interfaces." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-07062004-175450/.

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An immersed interface method and an immersed finite element method for solving linear elasticity problems with two phases separated by an interface have been developed in this thesis. For the problem of interest, the underlying elasticity modulus is a constant in each phase but vary from phase to phase. The basic goal here is to design an efficient numerical method using a fixed Cartesian grid. The application of such a method to problems with moving interfaces driving by stresses has a great advantage: no re-meshing is needed. A local optimization strategy is employed to determine the finite

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Deehan, Anna Marie. "The changing role of primary care with problem drinkers : an exploration of the interface between the general practitioner and the practice nurse." Thesis, King's College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322042.

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Sukarno, Setyawan Ajie. "Méthodes d'approximation au problème de routage de véhicule pour une gestion de flotte de drones." Thesis, Valenciennes, Université Polytechnique Hauts-de-France, 2019. http://www.theses.fr/2019UPHF0022.

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Aujourd’hui, le drone joue un rôle important dans les activités civiles et deviendra de plus en plus important à l’avenir. Récemment, de nouvelles tendances se dirigent vers la gestion d’une ﬂotte de drones aﬁn de réaliser les missions données. Ce problème ouvre de nombreuses idées de recherche, et notre projet est fait pour répondre au déﬁ, développer une plateforme de gestion de ﬂotte de drones. Entre plusieurs approches, le problème de routage de véhicule (VRP) est une étude parfaite pour relever ce déﬁ, aﬁn de répartir les tâches et de trouver le meilleur chemin pour chaque drone, en tenan

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25

Farry, James. ""Far more to it than appears on the surface" : an historical investigation of the interface between space science and the British mass media." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/far-more-to-it-than-appears-on-the-surface-an-historical-investigation-of-the-interface-between-space-science-and-the-british-mass-media(57002bff-b98f-4a6a-8d7b-4a24778bd964).html.

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In November 1953, the editor of the Manchester Guardian, AP Wadsworth, responded to Jodrell Bank Director Bernard Lovell regarding a complaint over an article that had appeared on the observatory's radio telescope project. Wadsworth understood there had been much collaboration between Lovell and his journalists in regard to the construction of the article and so the complaint suggested that there was 'far more to it (production) than appears on the surface'. Many scholars of science and the media point to the importance of uncovering the context of production from which popular science emerges

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Diagne, Mamadou Lamine. "Modelling and control of systems of conservation laws with a moving interface : an application to an extrusion process." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10098/document.

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Cette thèse porte sur l’étude des systèmes de lois de conservation couplés par une interface mobile. Un modèle dynamique d’un procédé d’extrusion obtenu à partir des bilans de masse, de taux d’humidité et d’énergie est proposé. Ce modèle exprime le transport de la matière et de la chaleur dans une extrudeuse par des systèmes d’équations hyperboliques définis sur deux domaines complémentaires variant dans le temps. L’évolution des domaines est dictée par une Equation aux Dérivées Ordinaires (EDO) issue du bilan de masse total dans une extrudeuse. Par le principe des applications contractantes l

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Cisternino, Marco. "A parallel second order Cartesian method for elliptic interface problems and its application to tumor growth model." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2012. http://tel.archives-ouvertes.fr/tel-00690743.

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Cette thèse porte sur une méthode cartésienne parallèle pour résoudre des problèmes elliptiques avec interfaces complexes et sur son application aux problèmes elliptiques en domaine irrégulier dans le cadre d'un modèle de croissance tumorale. La méthode est basée sur un schéma aux différences fi nies et sa précision est d'ordre deux sur tout le domaine. L'originalité de la méthode consiste en l'utilisation d'inconnues additionnelles situées sur l'interface et qui permettent d'exprimer les conditions de transmission à l'interface. La méthode est décrite et les détails sur la parallélisation, ré

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Bendada, Abdelhakim. "Tomographie infrarouge stimulée : estimation d'une résistance d'interface non uniforme." Vandoeuvre-les-Nancy, INPL, 1995. http://docnum.univ-lorraine.fr/public/INPL_T_1995_BENDADA_A.pdf.

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Les résistances thermiques d'interface sont la conséquence d'une discontinuité structurale entre deux matériaux. Des exemples peuvent être trouvés dans des délaminages au sein de composites laminés ou dans les applications de soudage où on cherche à avoir des assemblages parfaits entre deux matériaux. Ces discontinuités structurales peuvent être caractérisées en utilisant la thermographie infrarouge stimulée. La profondeur et la résistance de contact d'un défaut dans un matériau peuvent être identifiées en utilisant des méthodes basées sur la transformation De Laplace en temps pour les cas ou

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Wilson, Raymond Gary. "A Numerical Analysis of the Influence of Korteweg Stresses on the Flow and Mixing of Miscible Fluids." Cleveland, Ohio : Case Western Reserve University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=case1081283678.

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Thesis (Ph.D.)--Case Western Reserve University, 2004<br>Title from PDF (viewed on 01 October 2009) Department of Mechanical Engineering Includes abstract Includes bibliographical references Available online via the OhioLINK ETD Center

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Harutjunjan, G., and Bert-Wolfgang Schulze. "Conormal symbols of mixed elliptic problems with singular interfaces." Universität Potsdam, 2005. http://opus.kobv.de/ubp/volltexte/2009/2988/.

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Mixed elliptic problems are characterised by conditions that have a discontinuity on an interface of the boundary of codimension 1. The case of a smooth interface is treated in [3]; the investigation there refers to additional interface conditions and parametrices in standard Sobolev spaces. The present paper studies a necessary structure for the case of interfaces with conical singularities, namely, corner conormal symbols of such operators. These may be interpreted as families of mixed elliptic problems on a manifold with smooth interface. We mainly focus on second order operators and additi

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Ackerstierna, Linda, and Mikka Söder. "The Future of Podcasts : A Case Study based on Usability Heuristics of a Podcast Service User Interface of an iOS Application." Thesis, Uppsala universitet, Informationssystem, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446308.

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This study investigates the Usability of the podcast service User Interface (UI) of the iOS app Aftonbladet. The method used originates from a heuristic evaluation technique where semi- structured interviews were conducted with users of the podcast service to explore the usability and to find usability problems. The conducted interviews determined that there existed usability problems with the UI and thus, usability heuristics have been violated in the UI. Nielsen’s Ten Usability Heuristics for User Interface Design and Nielsen’s Severity Ratings for Usability Problems are applied to the int

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Abdelkafi, Omar. "Métaheuristiques hybrides distribuées et massivement parallèles." Thesis, Mulhouse, 2016. http://www.theses.fr/2016MULH9578/document.

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De nombreux problèmes d'optimisation propres à différents secteurs industriels et académiques (énergie, chimie, transport, etc.) nécessitent de concevoir des méthodes de plus en plus efficaces pour les résoudre. Afin de répondre à ces besoins, l'objectif de cette thèse est de développer une bibliothèque composée de plusieurs métaheuristiques hybrides distribuées et massivement parallèles. Dans un premier temps, nous avons étudié le problème du voyageur de commerce et sa résolution par la méthode colonie de fourmis afin de mettre en place les techniques d'hybridation et de parallélisation. Ensu

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Deheuvels, Thibaut. "Contributions à l'étude d'espaces de fonctions et d'EDP dans une classe de domaines à frontière fractale auto-similaire." Phd thesis, Université Rennes 1, 2013. http://tel.archives-ouvertes.fr/tel-00869946.

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Cette thèse est consacrée à des questions d'analyse en amont de la modélisation de structures arborescentes, comme le poumon humain. Plus particulièrement, nous portons notre intérêt sur une classe de domaines ramifiés du plan, dont la frontière comporte une partie fractale auto-similaire. Nous commençons par une étude d'espaces de fonctions dans cette classe de domaines. Nous étudions d'abord la régularité Sobolev de la trace sur la partie fractale de la frontière de fonctions appartenant à des espaces de Sobolev dans les domaines considérés. Nous étudions ensuite l'existence d'opérateurs de

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Gupta, Vijay 1962. "Problems in interface fracture." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/13975.

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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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Latige, Manuel. "Simulation numérique de l'ablation liquide." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00858600.

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Lors de la phase de rentrée atmosphérique d'une sonde spatiale, la paroi du corps est le siège de phénomènes physico-chimiques complexes. Nous nous intéressons dans cette thèse au cas où le matériau solide de l'objet de vol comporte plusieurs constituants s'ablatant de façon différentielle. En particulier, l'un de ces constituants subit un changement de phase donnant lieu à l'apparition d'une phase liquide. Nous sommes en présence de trois phases : solide, liquide et gaz. Les travaux effectués dans cette thèse correspondent au développement de méthodes numériques en 2D capables de modéliser le

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Harutjunjan, Gohar, and Bert-Wolfgang Schulze. "The Zaremba problem with singular interfaces as a corner boundary value problem." Universität Potsdam, 2004. http://opus.kobv.de/ubp/volltexte/2008/2685/.

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We study mixed boundary value problems for an elliptic operator A on a manifold X with boundary Y<br>i.e., Au = f in int X, T±u = g± on int Y±, where Y is subdivided into subsets Y± with an interface Z and boundary conditions T± on Y± that are Shapiro-Lopatinskij elliptic up to Z from the respective sides. We assume that Z ⊂ Y is a manifold with conical singularity v. As an example we consider the Zaremba problem, where A is the Laplacian and T− Dirichlet, T+ Neumann conditions. The problem is treated as a corner boundary value problem near v which is the new point and the main difficulty in t

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Zahedi, Sara. "Numerical Methods for Fluid Interface Problems." Doctoral thesis, KTH, Numerisk analys, NA, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-33111.

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This thesis concerns numerical techniques for two phase flowsimulations; the two phases are immiscible and incompressible fluids. Strategies for accurate simulations are suggested. In particular, accurate approximations of the weakly discontinuousvelocity field, the discontinuous pressure, and the surface tension force and a new model for simulations of contact line dynamics are proposed. In two phase flow problems discontinuities arise in the pressure and the gradient of the velocity field due to surface tension forces and differences in the fluids' viscosity. In this thesis, a new finite ele

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Samvin, David. "Finite Element Methods for Interface Problems." Licentiate thesis, Jönköping University, JTH, Industriell produktutveckling, produktion och design, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-54570.

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This thesis focuses on computationally efficient methods for flow in fractured porous media. Two approaches are presented where the interface is embedded on the underlying finite element mesh. The methods allow for representation of the interface geometry from the underlying discretization and with discontinuities across the interface. However, embedding interfaces raises stability concerns in which we alleviate using stabilization terms. The aim of this thesis is to present the basics of the two main approaches and to provide brief details on the mathematics involved.<br>Denna avhandling foku

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Gong, Yan. "Immersed-Interface Finite-Element Methods for Elliptic and Elasticity Interface Problems." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-07222007-232136/.

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The purpose of the research has been to develop a class of new finite-element methods, called immersed-interface finite-element methods, to solve elliptic and elasticity interface problems with homogeneous and non-homogeneous jump conditions. Simple non-body-fitted meshes are used. Single functions that satisfy the same non-homogeneous jump conditions are constructed using a level-set representation of the interface. With such functions, the discontinuities across the interface in the solution and flux are removed; and equivalent elliptic and elasticity interface problems with homogeneous jump

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Scheid, Jean-François. "Étude théorique et numérique de l'évolution morphologique d'interfaces." Paris 11, 1994. http://www.theses.fr/1994PA112027.

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L'objet de cette thèse est d'étudier un processus de dissolution-croissance où une phase solide est en contact avec une phase liquide. Ce phénomène s'accompagne d'un changement de géométrie de l'interface entre ces deux phases. Les lois physiques qui gouvernent ce processus conduisent mathématiquement à une loi de déplacement pour l'interface où la courbure moyenne apparait de façon non linéaire et à une équation parabolique pour la concentration de l'espèce chimique passée en solution. Il s'agit d'un problème de Stefan avec tension superficielle en dimension deux d'espace. Au chapitre 1, nous

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Wiegmann, Andreas. "The explicit jump immersed interface method and interface problems for differential equations /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/5774.

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Jentsch, L., D. Natroshvili, and I. Sigua. "Mixed Interface Problems of Thermoelastic Pseudo-Oscillations." Universitätsbibliothek Chemnitz, 1998. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-199801150.

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Three-dimensional basic and mixed interface problems of the mathematical theory of thermoelastic pseudo-oscillations are considered for piecewise homogeneous anisotropic bodies. Applying the method of boundary potentials and the theory of pseudodifferential equations existence and uniqueness theorems of solutions are proved in the space of regular functions C^(k+ alpha) and in the Bessel-potential (H^(s)_(p)) and Besov (B^(s)_(p,q)) spaces. In addition to the classical regularity results for solutions to the basic interface problems, it is shown that in the mixed interface problems the displac

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Sabawi, Younis Abid. "Adaptive discontinuous Galerkin methods for interface problems." Thesis, University of Leicester, 2017. http://hdl.handle.net/2381/39386.

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The aim of this thesis is to derive adaptive methods for discontinuous Galerkin approximations for both elliptic and parabolic interface problems. The derivation of adaptive method, is usually based on a posteriori error estimates. To this end, we present a residual-type a posteriori error estimator for interior penalty discontinuous Galerkin (dG) methods for an elliptic interface problem involving possibly curved interfaces, with flux-balancing interface conditions, e.g., modelling mass transfer of solutes through semi-permeable membranes. The method allows for extremely general curved elemen

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He, Xiaoming. "Bilinear Immersed Finite Elements For Interface Problems." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/27819.

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In this dissertation we discuss bilinear immersed finite elements (IFE) for solving interface problems. The related research works can be categorized into three aspects: (1) the construction of the bilinear immersed finite element spaces; (2) numerical methods based on these IFE spaces for solving interface problems; and (3) the corresponding error analysis. All of these together form a solid foundation for the bilinear IFEs. The research on immersed finite elements is motivated by many real world applications, in which a simulation domain is often formed by several materials separated from e

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Liang, Haodong. "Fractal Interfaces and Heat Transmission Problems." Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-dissertations/124.

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The main portion of my thesis focuses on a 2-dimensional second order heat transmission problem in domains with pre-fractal interfaces. My focus is on the numerical approximation of the solutions. Precisely, I€™m concerned to develop a suitable mesh refinement algorithm that could be adapted to our situation, by taking into account the regularity of the solutions and the geometry of irregular pre-fractal interfaces. I obtain an error estimate between the weak solution and the discrete solution, which indicates an optimal rate of convergence as in the classical case when the solution has H^2-re

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Yedeg, Esubalewe Lakie. "Analysis, Control, and Design Optimization of Engineering Mechanics Systems." Doctoral thesis, Umeå universitet, Institutionen för datavetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-119978.

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This thesis considers applications of gradient-based optimization algorithms to the design and control of some mechanics systems. The material distribution approach to topology optimization is applied to design two different acoustic devices, a reactive muffler and an acoustic horn, and optimization is used to control a ball pitching robot. Reactive mufflers are widely used to attenuate the exhaust noise of internal combustion engines by reflecting the acoustic energy back to the source. A material distribution optimization method is developed to design the layout of sound-hard material inside

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Angelides, Michael. "Stress compatible finite elements for bimaterial interface problems." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63808.

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Rutka, Vita. "Immersed interface methods for elliptic boundary value problems." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974190918.

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Zhang, Xu. "Nonconforming Immersed Finite Element Methods for Interface Problems." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/20380.

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In science and engineering, many simulations are carried out over domains consisting of<br />multiple materials separated by curves/surfaces. If partial differential equations (PDEs)<br />are used to model these simulations, it usually leads to the so-called interface problems of<br />PDEs whose coefficients are discontinuous. In this dissertation, we consider nonconforming<br />immersed "nite element (IFE) methods and error analysis for interface problems.<br /><br />We "first consider the second order elliptic interface problem with a discontinuous diffusion<br />coefficient. We propose new

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