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Dissertations / Theses on the topic 'Sign problem'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 April 2022

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1

Ucci, Allison. "American Sign Language : an influence on graphic design problem-solving /." Online version of thesis, 2008. http://hdl.handle.net/1850/6274.

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2

James, Frank. "Complex Langevin dynamics as a cure for the sign problem." Thesis, Swansea University, 2012. https://cronfa.swan.ac.uk/Record/cronfa42679.

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Theories with a chemical potential are difficult to treat numerically because the action is complex and therefore methods based on a probability interpretation of the weight break down. This is an issue known as the sign problem. Complex Langevin dynamics was first proposed in the early 1980s and does not rely in a probability interpretation of the weight, so it can in principle l)e applied even where there is a severe sign problem. However, the combined problems of numerical instabilities and incorrect convergence impeded such early studies. In this work, the problem of runaway trajectories i

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3

Neuberger, John M. (John Michael). "Existence of a Sign-Changing Solution to a Superlinear Dirichlet Problem." Thesis, University of North Texas, 1995. https://digital.library.unt.edu/ark:/67531/metadc278179/.

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We study the existence, multiplicity, and nodal structure of solutions to a superlinear elliptic boundary value problem. Under specific hypotheses on the superlinearity, we show that there exist at least three nontrivial solutions. A pair of solutions are of one sign (positive and negative respectively), and the third solution changes sign exactly once. Our technique is variational, i.e., we study the critical points of the associated action functional to find solutions. First, we define a codimension 1 submanifold of a Sobolev space . This submanifold contains all weak solutions to our proble

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4

Hassanpour, Mehran. "Sufficient Conditions for Uniqueness of Positive Solutions and Non Existence of Sign Changing Solutions for Elliptic Dirichlet Problems." Thesis, University of North Texas, 1995. https://digital.library.unt.edu/ark:/67531/metadc279227/.

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In this paper we study the uniqueness of positive solutions as well as the non existence of sign changing solutions for Dirichlet problems of the form $$\eqalign{\Delta u + g(\lambda,\ u) &= 0\quad\rm in\ \Omega,\cr u &= 0\quad\rm on\ \partial\Omega,}$$where $\Delta$ is the Laplace operator, $\Omega$ is a region in $\IR\sp{N}$, and $\lambda>0$ is a real parameter. For the particular function $g(\lambda,\ u)=\vert u\vert\sp{p}u+\lambda$, where $p={4\over N-2}$, and $\Omega$ is the unit ball in $\IR\sp{N}$ for $N\ge3$, we show that there are no sign changing solutions for small $\lambda$ and als

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5

Mori, Yuto. "Path optimization with neural network for sign problem in quantum field theories." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263466.

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6

Dumas, Warwick Michael. "On conditional Wiener integrals and a novel approach to the fermion sign problem." Thesis, University of Leicester, 2010. http://hdl.handle.net/2381/8330.

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The path-integral formulation of nonrelativistic quantum mechanics was introduced by Feynman in 1948. The use of Path Integral Monte Carlo can be put on a rigorous footing using conditional Wiener integrals. This thesis addresses the topics both of numerical error and of Monte Carlo error. A piecewise constant numerical method which is of second order of accuracy for computing conditional Wiener integrals for a rather general class of sufficiently smooth functional is proposed. The method is based on simulation of Brownian bridges via the corresponding stochastic differential equations (SDEs)

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7

Román, Parra Carlos Patricio. "Large conformal metrics with prescribed sign-changing Gauss curvature and a critical Neumann problem." Tesis, Universidad de Chile, 2014. http://www.repositorio.uchile.cl/handle/2250/116845.

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Ingeniero Civil Matemático<br>En esta memoria se estudian dos problemas semilineales elípticos clásicos en la literatura: el problema de la curvatura Gaussiana prescrita en dimensión 2, y el problema de Lin-Ni-Takagi con exponente crítico en dimensión 3. En ambos se encuentran soluciones con reviente cuando el valor de un parámetro involucrado se aproxima a cierto valor crítico. En el primer capítulo se estudia el siguiente problema: Dada una función escalar $\kappa(x)$, suficientemente regular, definida en una variedad Riemanniana compacta $(M,g)$ de dimensión 2, se desea saber si $\kappa$

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8

Beckert, Janis. "A numerical study of the sign problem in the Hubbard model using a modified discrete Hubbard-Stratonovich transformation." Thesis, KTH, Teoretisk fysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143790.

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9

Jerry, Nybäck. "What is Good Design? : On the problem of stereotypes and innovation in character design as reflected through the mentor archetype." Thesis, Högskolan på Gotland, Institutionen för speldesign, teknik och lärande, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hgo:diva-1952.

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This thesis aims to analyze the conventions of Character Design, and how one may innovate without losing visual communication. Focus is put on discussing stereotypical patterns as an inescapable but potentially harmful aspect of human behavior. The type of character being examined is the Mentor Archetype, as known in the Hero’s Journey, but also used throughout narrative in all its forms. A number of mentor characters from film, animation and video games are examined in order discern what common elements there are to the various depictions of mentors found throughout both historic and popular

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10

Umeda, Naoya. "Critical behavior of the matrix models generating 3D random volumes." Kyoto University, 2018. http://hdl.handle.net/2433/232234.

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11

Scherzer, Manuel [Verfasser], and Ion-Olimpiu [Akademischer Betreuer] Stamatescu. "Phase transitions in lattice gauge theories: From the numerical sign problem to machine learning / Manuel Scherzer ; Betreuer: Ion-Olimpiu Stamatescu." Heidelberg : Universitätsbibliothek Heidelberg, 2019. http://d-nb.info/1191760340/34.

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12

Zhang, Ling. "Efficiency Comparison of Distribution-Free Transformations in the Straight-Line Regression Problem." Thesis, Uppsala University, Department of Statistics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-126667.

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<p>In statistical inference of the distribution-free straight-line regression problem, two common transformations, rank transformation and sign transformation, are used to construct the test statistics. When shall we need to use the transformations and which transformation is more efficient are two common questions met by researchers. In this thesis, we will discuss the comparison of the efficiencies of the statistics before and after the rank transformation or the sign transformation in both theoretical and practical ways. Simulation is also used to compare the efficiencies of the statistics

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13

Thibaut, Jérôme. "Corrélations, intrication et dynamique des systèmes quantiques à N Corps : une étude variationnelle." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEN021/document.

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Cette thèse porte sur l'étude de systèmes quantiques à N-corps à température nulle, où le comportement du système n'est alors soumis qu'aux effets quantiques. Je vais présenter ici une approche variationnelle développée avec Tommaso Roscilde, mon directeur de thèse, et Fabio Mezzacapo, mon co-encadrant de thèse, pour étudier ces systèmes.Cette approche se base sur une parametrisation de l’état quantique (dit Ansatz) à laquelle on applique une procédure d’optimisation variationnelle lui permettant de reproduire l'évolution d'un système soumis à l'équation de Schrödinger, tout en limitant le nom

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14

Matsumoto, Nobuyuki. "Geometry of configuration space in Markov chain Monte Carlo methods and the worldvolume approach to the tempered Lefschetz thimble method." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263464.

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15

Cox, Jürgen 1970. "Solution of sign and complex action problems with cluster algorithms." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8646.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2001.<br>Includes bibliographical references (p. [105]-109) and index.<br>Two kinds of models are considered which have a Boltzmann weight which is either not real or real but not positive and so standard Monte Carlo methods are not applicable. These sign or complex action problems are solved with the help of cluster algorithms. In each case improved estimators for the Boltzmann weight are constructed which are real and positive. The models considered belong to two classes: fermionic and non-fermionic models. An example

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16

Volmer, Julia Louisa. "New attempts for error reduction in lattice field theory calculations." Doctoral thesis, Humboldt-Universität zu Berlin, 2018. http://dx.doi.org/10.18452/19350.

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Gitter QCD ist ein erfolgreiches Instrument zur nicht-perturbativen Berechnung von QCD Observablen. Die hierfür notwendige Auswertung des QCD Pfadintegrals besteht aus zwei Teilen: Zuerst werden Stützstellen generiert, an denen danach das Pfadintegral ausgewertet wird. In der Regel werden für den ersten Teil Markov-chain Monte Carlo (MCMC) Methoden verwendet, die für die meisten Anwendungen sehr gute Ergebnisse liefern, aber auch Probleme wie eine langsame Fehlerskalierung und das numerische Vorzeichenproblem bergen. Der zweite Teil beinhaltet die Berechnung von Quark zusammenhängenden und unz

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17

Scarlet, Benjamin S. 1974. "Solving sign problems with meron cluster algorithms : simulating field theories at non-zero chemical potential." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/8280.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, February 2001.<br>Includes bibliographical references (p. 97-102) and index.<br>Numerical simulation of quantum systems develop sign problems upon the introduction of a chemical potential. The sign problem thus makes many interesting physical systems very difficult to study numerically. In this thesis, two related systems which develop sign problems in this way are considered: a D-Theory representation of a 1+1 dimensional 0(3) quantum field theory with a chemical potential, and antiferromagnetic Heisenberg quantum spin

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18

Finan, Marcel Basil. "Existence of Many Sign Changing Non Radial Solutions for Semilinear Elliptic Problems on Annular Domains." Thesis, University of North Texas, 1998. https://digital.library.unt.edu/ark:/67531/metadc278251/.

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19

Eriksson, Moa. "Introductory physics students' conceptions of algebraic signs used in kinematics problem solving." Thesis, Uppsala universitet, Fysikundervisningens didaktik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-226936.

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The ways that physics students’ conceptualize – the way they experience – the use of algebraic signs in vector-kinematics has not been extensively studied. The most comprehensive of these few studies was carried out in South Africa 15 years ago. This study found that the variation in the ways that students experience the use of algebraic signs could be characterized by five qualitatively different categories. The consistency of the nature of this experience across either the same or different educational settings has never given further consideration. This project sets out to do this using two

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20

Geddert, Heinrich [Verfasser]. "Recht und Moral. : Zum Sinn eines alten Problems. / Heinrich Geddert." Berlin : Duncker & Humblot, 2019. http://d-nb.info/1237970814/34.

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21

Alsford, Sally Elizabeth. "Sin as a problem of twentieth century systematic theology." Thesis, Durham University, 1987. http://etheses.dur.ac.uk/7067/.

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The argument of my thesis concerns the understanding of the doctrine of sin in systematic theology, and, as a corollary of this, the scope of the doctrine in terms of its content. My argument is that the doctrine of sin is particularly prone to being defined with a strictness or narrowness which causes it to lose much of its meaning; that such limiting treatment tends to be accompanied by distorted relationships with, or over-determination by, other key doctrines, particularly that of salvation; and that it is helpful to see this tendency as a failure to see sin as a symbol with a complex of m

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22

Stylianou, Athanasios [Verfasser]. "Comparison and sign preserving properties of bilaplace boundary value problems in domains with corners / Athanasios Stylianou." München : Verlag Dr. Hut, 2011. http://d-nb.info/1011441411/34.

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23

Stylianu, Athanasios [Verfasser]. "Comparison and sign preserving properties of bilaplace boundary value problems in domains with corners / Athanasios Stylianou." Köln : Universitäts- und Stadtbibliothek Köln, 2010. http://d-nb.info/101373663X/34.

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24

Benner, Peter, Enrique S. Quintana-Ortí, and Gregorio Quintana-Ortí. "Solving Linear-Quadratic Optimal Control Problems on Parallel Computers." Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200601704.

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We discuss a parallel library of efficient algorithms for the solution of linear-quadratic optimal control problems involving largescale systems with state-space dimension up to $O(10^4)$. We survey the numerical algorithms underlying the implementation of the chosen optimal control methods. The approaches considered here are based on invariant and deflating subspace techniques, and avoid the explicit solution of the associated algebraic Riccati equations in case of possible ill-conditioning. Still, our algorithms can also optionally compute the Riccati solution. The major computational task o

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25

Rivarola, José Luis. "Monosemismo y polisemismo. Algunas observaciones sobre el problema de la unidad del signo." Pontificia Universidad Católica del Perú, 2013. http://repositorio.pucp.edu.pe/index/handle/123456789/103101.

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26

Girisch, Jana [Verfasser], Roland [Akademischer Betreuer] Merten, and Christine [Akademischer Betreuer] Wiezorek. "Plötzlich gesund! : Vom Sinn und der Notwendigkeit, (auch) im Justizvollzug gesundheitsförderliche Strukturen zu implementieren / Jana Girisch. Gutachter: Roland Merten ; Christine Wiezorek." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2014. http://d-nb.info/1049929373/34.

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27

Carrara, Camilla Miguel. "Uma aplicação do SIG para a localização e alocação de terminais logísticos em áreas urbanas congestionadas." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/18/18144/tde-07022008-111929/.

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O presente trabalho a partir da caracterização da problemática dos transportes na área central de Uberlândia (MG), e com a utilização das ferramentas do software TransCAD (SIG-T), como problema de localização de instalações e roteirização de veículos, buscou-se propor uma alternativa que contribuísse para a distribuição urbana de cargas, principalmente nas áreas centrais urbanas, com foco na minimização dos custos de transporte e considerando a realidade brasileira e as atuais discussões sobre alternativas de inovações operacionais e tecnológicas. O método escolhido para o estudo de caso baseo

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28

Costa, Airton Manoel Romero. "Um sistema de roteirização via internet para o campus da USP de Ribeirão Preto." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-09022011-170141/.

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Neste trabalho uma metodologia é proposta para disponibilizar, via internet, um serviço de roteirização de endereços para o campus da USP de Ribeirão Preto, com a determinação do menor caminho entre duas localidades. Esta metodologia pode ser aplicada não apenas ao campus da USP de Ribeirão Preto, mas ela poderá ser estendida às cidades e/ou regiões que possuam um mapa digital correspondente. Um sistema, denominado SIGRIB, foi desenvolvido para implementar a metodologia proposta. Utiliza o software ARCVIEW como suporte na manipulação de dados geográficos e cadastrais. Para facilitar a interaçã

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29

Simón, Pinero Juan Jacobo. "El problema de la caracterización y de la unicidad." Doctoral thesis, Universidad de Murcia, 1992. http://hdl.handle.net/10803/10969.

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En este trabajo se abordan dos problemas clásicos en el estudio de los anillos de endomorfismos. El problema de la caracterización, que relaciona propiedades de un anillos con el anillo de endomorfismos de ciertos objetos notables y el de la unicidad, que establece hasta qué grado el anillos base está determinado por el anillo de endomorfismos del objeto elegido.Las relaciones se establecen en términos del lenguaje de las categorías, y para ello, primero se desarrolla una versión de la teoría de Morita para el caso de los anillos sin uno

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Truskaitė, Jūratė. "Komercinių žymenų teisinės apsaugos problemos." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2009~D_20100204_100802-08429.

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Disertacijoje nagrinėjamos aktualios problemos, kylančios komercinių žymenų (prekių ženklų, firmų vardų ir kitų komercinėje veikloje naudojamų žymenų, turinčių skiriamąjį požymį) teisinės apsaugos srityje. Disertacijos turinį sudaro keturi skyriai, iš kurių pirmasis nagrinėja komercinių žymenų teisinės apsaugos tikslus ir formas, o kiti – tam tikrą probleminę komercinių žymenų teisinės apsaugos sritį: firmų vardų sampratą ir teisinės apsaugos ribas; komercinių žymenų apsaugą pagal nesąžiningos konkurencijos teisę; reputaciją turinčių žymenų papildomą apsaugą; nagrinėjamų institutų tarpusavio k

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31

Theis, Laurent. "Étude du développement de la compréhension du signe = chez des enfants de première année du primaire h[ressource électronique]." Sherbrooke : Université de Sherbrooke, 2003.

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32

Yeung, Min. "Means to control the traffic problems of the cross harbour tunnel : with focus on traffic management and toll pricing /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19668788.

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33

SAHMIM, Slah. "Un schéma aux volumes finis avec matrice signe pour les systèmes non homogènes." Phd thesis, Université Paris-Nord - Paris XIII, 2005. http://tel.archives-ouvertes.fr/tel-00010000.

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Cette thèse est consacrée à l'analyse, à l'application et à l'extension bidimensionnelle, d'un nouveau schéma aux volumes finis (SRNH) proposé récemment pour une classe de système non homogène. L'analyse de stabilité du schéma, d'abord dans le cas scalaire ensuite dans le cas de systèmes, mène à une nouvelle formulation où intervient le signe de la matrice Jacobienne du système de lois de bilan considéré. Pour le système de Saint Venant avec terme de pente, on montre formellement que le schéma SRNHS vérifie la C-propriété exacte introduite pour les schémas équilibres par Bermùdez et Vázquez. L

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34

Nam, Hyena. "Visual and Verbal Communication on Sustainable Packaging As a Vehicle for Public Education and Awareness." Kent State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=kent1556185867839811.

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35

Mattos, José Roberto Abreu de. "O problema do mal no livre arbítrio de Santo Agostinho." Pontifícia Universidade Católica de São Paulo, 2013. https://tede2.pucsp.br/handle/handle/18325.

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Made available in DSpace on 2016-04-29T14:27:23Z (GMT). No. of bitstreams: 1 Jose Roberto Abreu de Mattos.pdf: 1065680 bytes, checksum: e698392ff109025c1b789802d20da2ac (MD5) Previous issue date: 2013-06-05<br>The aim of this monographic paper is to reflect upon the problem of evil. For a better understanding of the subject we decided to approach fundamental issues issues such as : what is evil, the reason of evil, its origen and mainly the meaning of evil and its suffering in relation to one s free will. Appealing to specialized bibliography, other concepts are seen essential for the unders

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Pratt, Aaron, and Aaron Pratt. "On the Concept of Sin in the Theology of Liberation and Josiah Royce's The Problem of Christianity: Towards a Theo-Philosophical Ethics." Thesis, University of Oregon, 2012. http://hdl.handle.net/1794/12454.

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This essay proposes that theology and philosophy are not mutually exclusive or at odds with one another methodologically, but in fact that religious categories are useful in philosophical analyses, and particularly when it comes to ethics. In this essay, I examine the theological concept of sin as it is expressed in Latin American Liberation Theology (over and against the more traditional understanding of sin in Western Christianity) as the domination of the Other and the oppression of the poor through geo-political systems of power. I explore the responses to this notion from the Magisterium

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Ortín, Nadal Anna Pilar. "Mental activity in Descartes' causal-semantic model of sensory perception." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31538.

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The aim of this thesis is to defend a reading of Descartes' theory of sensory perception in which, against a widespread interpretation, the mind is not a passive receiver of inputs from the environment, but an active decoder of neural information that contributes to the representational content of ideas. I call this the 'mental activity thesis' and, in the overall picture, I identify it as one of the philosophical implications of the seventeenth-century scientific revolution. Within Descartes' dualism, to offer a theory of sensory perception amounts to describing the interplay between the natu

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Rodríguez, Villalobos Alejandro. "Estudio del efecto de la asimetría en problemas de rutas de vehículos." Doctoral thesis, Editorial Universitat Politècnica de València, 2012. http://hdl.handle.net/10251/15184.

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Esta Tesis Doctoral demuestra que la realidad de las redes de transporte que caracterizan los problemas de rutas reales de las empresas, es muy compleja y asimétrica; y esto queda reflejado en las matrices de distancias (tiempos o costes) entre pares de localizaciones que son la base de todo problema de rutas. En esta investigación, se cuantifica la medida en la que el grado de asimetría de las matrices de distancias depende de factores como el territorio y la localización de los clientes; y se subraya la importancia de la obtención de las matrices de distancias reales asimétricas y la barrer

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Torres, Verdugo Rubén Darío. "Paralelización de algoritmo numérico para resolución de problemas en mecánica de sólidos." Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/137992.

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Ingeniero Civil Mecánico<br>Dentro de los métodos de simulación numérica para resolución de ecuaciones diferenciales parciales (EDP's), los métodos sin malla han sido desarrollados desde hace aproximadamente veinte años. A diferencia del método de elementos finitos, los métodos sin malla no necesitan una malla definida para la construcción de sus funciones de base, las que se crean únicamente por la distribución de los nodos en el dominio. Esta característica hace a este método más atractivo en problemas donde exista distorsión de la malla, sin embargo, requieren un tiempo extra en su cálculo

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Periwal, Priyanka. "VLS growth and characterization of axial Si-SiGe heterostructured nanowire for tunnel field effect transistors." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT045.

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L'augmentation des performances des circuits intégrés s'est effectué durant les trentes dernières années par la miniaturisation du composant clé à savoir le transistor MOSFET. Cette augmentation de la densité d'intégration se heurte aujourd'hui à plusieurs verrous, notamment celui de la puissance consommée qui devient colossale. Il devient alors nécessaire de travailler sur de nouveaux composants, les transistors à effet tunnel, où les porteurs sont injectés par effet tunnel bande à bande permettant de limiter considérablement la puissance consommée en statique. Les nanofils semiconducteurs so

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Celli, Martin. "Sur les mouvements homographiques de N corps associés à des masses de signe quelquonque, le cas particulier où la somme des masses est nulle, et une application à la recherche de chorégraphies perverses." Paris 7, 2005. https://tel.archives-ouvertes.fr/tel-00011790.

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Sousa, Karla Carolina Vicente de. "Problemas elípticos semilineares com não linearidades do tipo côncavo-convexo." Universidade Federal de Goiás, 2017. http://repositorio.bc.ufg.br/tede/handle/tede/6897.

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Submitted by JÚLIO HEBER SILVA (julioheber@yahoo.com.br) on 2017-03-03T18:04:36Z No. of bitstreams: 2 Dissertação - Karla Carolina Vicente de Sousa 2017.pdf: 802534 bytes, checksum: b021fd17684c91eaed58191b3674afd7 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-03-06T10:40:35Z (GMT) No. of bitstreams: 2 Dissertação - Karla Carolina Vicente de Sousa 2017.pdf: 802534 bytes, checksum: b021fd17684c91eaed58191b3674afd7 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf842

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Waszek, David. "Les représentations en mathématiques." Thesis, Paris 1, 2018. http://www.theses.fr/2018PA01H231.

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Pour résoudre un problème de mathématiques ou comprendre une démonstration, une figure bien choisie est parfois d’un grand secours. Ce fait souvent remarqué peut être vu comme un cas particulier d’un phénomène plus général. Utiliser une figure plutôt que des phrases, reformuler un problème sous la forme d’une équation, employer telles notations plutôt que telles autres : dans tous ces cas, en un sens, on ne fait que représenter sous une nouvelle forme ce qu’on sait déjà, et pourtant, cela peut permettre d’avancer. Comment est-ce possible ? Pour répondre à cette question, la première partie de

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Celli, Martin. "Sur les mouvements homographiques de N corps associés à des masses de signe quelconque, le cas particulier où la somme des masses est nulle, et une application à la recherche de chorégraphies perverses." Phd thesis, Université Paris-Diderot - Paris VII, 2005. http://tel.archives-ouvertes.fr/tel-00011790.

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Cette thèse a été préparée à l'Institut de Mécanique Céleste et de Calcul des Ephémérides de l'Observatoire de Paris, de septembre 2001 à avril 2005, sous la direction de MM. Alain Chenciner et Alain Albouy. Elle traite du problème des N corps, qui consiste en l'étude des solutions des équations de Newton. Celles-ci décrivent le mouvement de N particules ponctuelles en interaction gravitationnelle. Cette thèse a plus précisément pour objet l'étude des solutions homographiques (les rapports entre les distances mutuelles sont constants) associées à des masses de signe quelconque. On étudie le ca

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Silva, Valenzuela Rodrigo Alfonso. "Desarrollo de un método de integración nodal para problemas de mecánica de sólidos lineal utilizando la descomposición del elemento virtual." Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/170002.

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Tesis para optar al grado de Magíster en Ciencias de la Ingeniería, Mención Mecánica<br>En la integración numérica de los métodos de Galerkin sin malla, debido a la complejidad de las funciones de forma, es necesario utilizar una gran cantidad de puntos de integración para lograr que el método sea estable, lo que aumenta los tiempos de cómputo. Por otro lado, la integración directa en el nodo puede ser deseable porque se basa en menos evaluaciones de puntos de integración, pero conduce a inestabilidad numérica debido a un mecanismo similar a la subintegración y al desvanecimiento de las deriva

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Yeung, Min, and 楊勉. "Means to control the traffic problems of the cross harbour tunnel: with focus on traffic management and tollpricing." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31951132.

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Duda, Robson Fernando. "APLICAÇÃO DE HEURÍSTICAS E META-HEURÍSTICAS NO DESENVOLVIMENTO DE UM SISTEMA DE APOIO A DECISÃO PARA RESOLUÇÃO DE PROBLEMAS DE ROTEAMENTO DE VEÍCULOS APLICADOS À AGRICULTURA." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2014. http://tede2.uepg.br/jspui/handle/prefix/169.

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Made available in DSpace on 2017-07-21T14:19:39Z (GMT). No. of bitstreams: 1 Robson Fernando Duda.pdf: 3342961 bytes, checksum: 3f61d3a8f1dcfb461c6860c82d3f54db (MD5) Previous issue date: 2014-02-28<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This paper presents a solution to the routing problem of vehicles with homogeneous fleet. To do so, heuristic and metaheuristic based algorithms applied towards the development of a decision support system, with georeferenced interface were developed. The algorithms had as base heuristic methods built in two phases, besides a metah

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Brígida, Gabriel Faustino Santa. "Fatores de risco para problemas respiratórios e musculoesqueléticos : o papel do tabagismo passivo e dor lombar /." Presidente Prudente, 2016. http://hdl.handle.net/11449/143868.

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Orientador: Dionei Ramos<br>Resumo: Introdução: Estima-se que um terço da população mundial inale involuntariamente a fumaça do cigarro, o que pode causar efeitos adversos como alteração dos sinais vitais, redução da função pulmonar e aumentar o risco de desenvolvimento de doenças respiratórias crônicas como a asma. Durante a exacerbação da asma, ocorre aumento da atividade dos músculos respiratórios acessórios e abdominais, o que pode resultar em adaptações musculares e desestabilização da coluna vertebral com consequente relato de dor lombar. Objetivos: O objetivo do primeiro estudo foi aval

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Brígida, Gabriel Faustino Santa [UNESP]. "Fatores de risco para problemas respiratórios e musculoesqueléticos: o papel do tabagismo passivo e dor lombar." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/143868.

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Submitted by GABRIEL FAUSTINO SANTA BRIGIDA null (gabrielfaustino_gf@hotmail.com) on 2016-09-10T00:49:18Z No. of bitstreams: 1 Texto Dissertação_final.pdf: 1386372 bytes, checksum: b7a980eac33c2f79eb4ffd155d3c0ee9 (MD5)<br>Approved for entry into archive by Juliano Benedito Ferreira (julianoferreira@reitoria.unesp.br) on 2016-09-13T14:03:49Z (GMT) No. of bitstreams: 1 brigida_gfs_me_prud.pdf: 1386372 bytes, checksum: b7a980eac33c2f79eb4ffd155d3c0ee9 (MD5)<br>Made available in DSpace on 2016-09-13T14:03:49Z (GMT). No. of bitstreams: 1 brigida_gfs_me_prud.pdf: 1386372 bytes, checksum: b7a980

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Sofia, Estanislao. "Le problème de la définition des entités linguistiques chez Ferdinand de Saussure." Phd thesis, Paris 10, 2009. http://tel.archives-ouvertes.fr/tel-00465625/en/.

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La question qui est au cœur de cette thèse peut donc être formulée d'une manière apparemment simple, à savoir : si la langue est un système, quels sont les éléments qui la constituent ? Cette simplicité n'est pourtant qu'apparente, et dissimule, en réalité, une grande complexité. Une réponse acceptable à cette question consisterait en effet non simplement en une affirmation qui précise, par exemple, que les éléments du système Langue sont tels et tels. Elle devrait comporter, également, une explication de leur mode (ou leurs modes) d'interaction, une formulation de leurs lois, une définition d

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