Submitted by Maike Costa (maiksebas@gmail.com) on 2017-05-23T14:51:55Z No. of bitstreams: 1 arquivototal.pdf: 7468223 bytes, checksum: d6989870b5f353c5592a40ac6ebb0333 (MD5) / Made available in DSpace on 2017-05-23T14:51:55Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 7468223 bytes, checksum: d6989870b5f353c5592a40ac6ebb0333 (MD5) Previous issue date: 2016-05-07 / For many years the power transmission and movement for gears has been an important technology in the automotive, mechanical and aeronautical industries, justifying the considerable number of research carried out under the quality control of these components. Nowadays, involute profile inspections of cylindrical gears have been carried out using CNC Coordinate Measuring Machines (CMMs) with rotary tables and dedicated measurement software, equipped with contact scanning sensors, Touch Trigger Probes – TTP or non-contact, Laser. However, many companies that manufacture and inspect gears use manual CMMs with point to point sensors, thus being unable to issue the profile deviation report. In respect, the motivation for this research is to develop and validate inspection strategies for determining the Total Profile Deviation (Fα) of spur gears, according to ISO 1328, using of a mathematical tool NURBS (Non-Uniform Rational B-Splines) and CMMs manual. Strategies for changing the NURBS weight parameter wi also were applied to assist in inspection definition procedure, and this is one more degree of freedom. In the first moment, before the execution of experimental procedures, simulations were carried out on a computational system and showed satisfactory results. For the experimental tests, a manual CMM MICRO-HITE 3D model was used with point to point sensor. Simulations and experimental results showed that the NURBS technique contributes to manual CMM application using Touch Trigger Probes in measuring the spur gears involute profile. The experimental results showed the methodology efficacy. / Por muitos anos a transmissão de movimento e de potência por engrenagens tem sido uma tecnologia importante nas indústrias automotiva, mecânica e aeronáutica, justificando assim a considerável quantidade de pesquisas realizadas no âmbito do controle de qualidade destes componentes. Atualmente, inspeções dos perfis evolventes de engrenagens cilíndricas vêm sendo realizadas utilizando Máquinas de Medição por Coordenadas (MMCs) CNC com mesas rotativas e softwares de medição dedicados, equipadas com sensores por contato de escaneamento, do tipo Touch Trigger Probe – TTP, ou sem contato, Laser. Porém, muitas empresas que fabricam e inspecionam engrenagens utilizam MMCs manuais com sensores do tipo ponto a ponto, ficando assim impossibilitadas de emitir o relatório de desvio de perfil. Neste sentido, a motivação para esta pesquisa é desenvolver e validar estratégias de inspeção para determinação do Desvio Total de Perfil (Fα) de engrenagens cilíndrica de dentes retos, segundo a norma ISO 1328, fazendo o uso da ferramenta matemática NURBS (Non – Uniform Rational B-Splines) e de MMCs manuais. Estratégias para alteração do parâmetro peso wi das NURBS também serão aplicadas para auxiliar na definição do procedimento de inspeção, sendo este um grau de liberdade a mais do modelo. No primeiro momento, antes da execução dos procedimentos experimentais, simulações foram realizadas em um sistema computacional, e apresentaram resultados satisfatórios. Para os testes experimentais foi utilizada uma MMC manual modelo MICRO-HITE 3D, com sensor do tipo ponto a ponto. Resultados de simulações e experimentais mostraram que a técnica NURBS contribui para aplicação de MMC manual usando sensor Touch Trigger na medição do perfil evolvente de engrenagens cilíndricas de dentes retos. Os resultados experimentais demonstraram a eficácia da metodologia desenvolvida.

Nous présentons une approche alternative aux diagonalisations exactes de calculs en modèles en couches pour l'étude microscopique de la structure nucléaire. Nous avons tout d'abord minimisé l'énergie totale du système par la résolution des équations Hartree-Fock dans la base définie par l'espace de valence du modèle en couches. Nous avons finalisé la mise au point de ce programme par comparaison des résultats avec les solutions de problèmes solubles analytiquement comme ceux d'un hamiltonien SU(3) ou par comparaison avec des diagonalisations exactes du modèle en couches. Ensuite, nous avons mis au point des procédures pour l'obtention de ces mêmes calculs avec contraintes pour une description complète de la surface d'énergie potentielle d'un noyau donné en fonction des degrés de liberté Q20 et Q22. La restauration du moment angulaire par méthode de projections a permis d'obtenir les spectres des noyaux rotationnels dans le cas axial et dans le cas triaxial. Enfin, la méthode des coordonnées génératrices a permis le mélange de ces déterminants de Slater non orthogonaux. Parmi les différentes applications, nous avons pu décrire les noyaux déformés le long de la ligne N=Z autour du80Zr ou un nouvel îlot d'inversion à N=50. / We present an alternative approach to shell diagonalizations for microscopic description of nuclear structure. First we minimized the total system energy solving the Hartree-Fock equations within the shell model valence space. The results are compared with exact shell model diagonalization and an exact soluble SU(3) hamiltonian. Then, we developed procedures to obtain the same of type calculations with constrained conditions on the quadrupole degrees of freedom to obtain the full potential energy surfaces. The angular momentum restauration was obtained through projection method to generate rotionnal spectra of nuclei in both axial and triaxial cases. Finally the generate coordinate method was applied to mix several of these non-orthogonal Slater determinants. Among several applications we managed to describe deformed nuclei along the N=Z line around 80Zr or a new island of deformation at N=50. Finally, a first application in the superheavy region predicts a spherical gap for the Z=114, N=184 isotope

Ce mémoire porte sur le comportement des solitons affectés, lors de leur entrée dans un guide d'onde à fibre optique, d'une légère distorsion de profil par rapport au profil stationnaire dans le guide. Notre modèle théorique combine l'équation de propagation du champ électrique (Equation de Schrödinger Non Linéaire) et le système d'équations d'évolution des paramètres physiques de l'impulsion (issu de la théorie des coordonnées collectives). Nous dressons une cartographie générale qui dévoile une diversité insoupçonnée de comportements dynamiques au voisinage de l'état stationnaire de l'impulsion, liée à la perturbation initiale du profil de l'impulsion. Cette cartographie établit une classification des solitons en deux grandes familles, correspondant respectivement aux impulsions lumineuses qui génèrent un rayonnement au cours de leur propagation et aux impulsions non rayonnantes. Au sein de chacune de ces deux grandes familles d'impulsions, nous démontrons l'existence de comportements atypiques, que nous qualifions de solitons hyperthermiques (solitons chauds), solitons hypothermiques (solitons froids), et solitons isothermiques, qui correspondent respectivement à des impulsions qui se propagent de manière hautement stable avec un niveau d'énergie supérieur, inférieur, et égal à l'énergie de l'état stationnaire. Aux frontières des domaines d'existence de ces différents types de soliton, nous trouvons des comportements hybrides, correspondant à des solitons qui se refroidissent en cours de propagation suite à une perte significative d'énergie provoquée par un rayonnement intense, et qui changent d'état (de l'hyperthermie à l'hypothermie, ou de l'isothermie à l'hypothermie). Enfin, l'onde de rayonnement émise par une impulsion lumineuse n'est pas identifiée comme étant un processus continuel, mais plutôt comme une bouffée d'énergie émise en début de propagation, et sa suppression dans le guide d'onde est considérée comme réalisable / This thesis examines the dynamical behaviour of solitons which are affected, when entering a fiber-optic waveguide, by a slight distortion of profile as compared to the stationary profile in the guide. Our theoretical model combines the propagation equation of the electric field (Non-Linear Schrödinger Equation) and the system of equations of evolution of the physical parameters of the pulse (derived from the collective coordinates theory). We establish a general mapping which reveals an unsuspected diversity of dynamic behaviour around the stationary state of the pulse, in relation with the initial perturbation of the pulse's profile. This mapping establishes a classification of solitons in two broad categories, which correspond to light pulses that generate radiation during their propagation and to non-radiating pulses, respectively. Within each of these two broad classes of pulses, we demonstrate the existence of different kinds of atypical behaviour, which we qualify as hyperthermic solitons (hot solitons), hypothermic solitons (cold solitons) and isothermic solitons, which correspond respectively to pulses that propagate in a highly stable manner with an energy level higher than, lower than, and equal to the energy of the stationary state. On the borders of the domains of existence of these various types of solitons, we find hybrid behaviours, corresponding to solitons that cool during propagation, due to a significant loss of energy caused by an intense radiation, and which change state (from hyperthermia to hypothermia, or from isothermal to hypothermia). Finally, the radiation emitted by a light pulse is not identified as being a continual process, but rather as a ball of energy emitted in the beginning of propagation, and its suppression in the waveguide is considered as practicable

État insulaire situé au large des côtes sénégalo-mauritaniennes, le Cap-Vert a été peuplé à partir dela fin du 15e siècle de colons européens et d’esclaves africains. Il a hérité de cette histoire, unesituation diglossique où le portugais est la langue officielle alors que le créole, aujourd’hui dénommé« langue cap-verdienne », – né des contacts linguistiques luso-africains – est le véhicule del’expression quotidienne. L’histoire de la société cap-verdienne plonge aussi ses racines dans cellede l’émigration et de la mobilité nationale et internationale. Si les conditions climatiques ont pousséde nombreux Cap-Verdiens à l’exil, aussi bien en Afrique qu’en Europe ou aux Etats-Unis, leshandicaps d’ordre structurel ont, par ailleurs, favorisé les migrations constantes des îliens à l’échellemondiale.À partir d’enquêtes menées aussi bien au Cap-Vert qu’en France, sont étudiées les différences decompétences langagières entre des Cap-Verdiens ayant acquis leur(s) langue(s) dans chacun deces pays. L’analyse s’appuie essentiellement sur leurs parcours personnels et accorde une attentionparticulière aux formes de bilinguisme des uns et des autres. Les observations, qui portent a priorisur le créole, le portugais et le français, prennent en compte des productions orales spontanées etprovoquées et des productions écrites, car elles sont révélatrices de la compétence orale. / Island state located off the Senegalese-Mauritanian coast, Cape Verde was inhabited from the late15th century by European settlers and African slaves. He inherited this story, a diglossic situationwhere Portuguese is the official language while Creole, now called « Cape Verdean language », -born of Luso-African language contacts – is the vehicle of everyday expression. The history of CapeVerdean society is also rooted in that of emigration and national and international mobility. If weatherconditions have prompted many Cape Verdean to exile, both in Africa than in Europe or the UnitedStates, structural handicaps have also favored the constant migrations of islanders worldwide.Through surveys conducted both in Cape Verde and France, are studied differences in languageproficiency between Cape Verdean who acquired their languages in each of these countries. Theanalysis is based primarily on their personal journeys and pays particular attention to the forms ofbilingualism of each other. The study, which focuses at first on Creole, Portuguese and French,include spontaneous and induced oral productions, and written productions, which are indicative oforal proficiency.

This dissertation deals with two major topics that involve spectroscopic studies of (a) divalent group 10 metals and (b) silver(I)-phosphine complexes. The scope of the work involved the delineation of the electronic structure of these complexes in different environments and their use in electronic devices. The first topic is a look at the luminescence of tetrahedral silver(I)-phosphine complexes. Broad unstructured emissions with large Stokes shifts were found for these complexes. Computational analysis of the singlet and triplet state geometries suggests that this emission is due to a Jahn-Teller type distortion. The second topic represents the major thrust of this research, which is an investigation into the electronic structure of M(diimine)X2 (M= Pt(II), Pd(II), or Ni(II); X = dichloro, or dithiolate ligands) complexes and their interactions with an electron acceptor or Lewis acid. Chapter 3 assesses the use of some of these complexes in dye sensitized solar cells (DSSCs); it is shown that these complexes may lead to a viable alternative to the more expensive ruthenium-based dyes that are being implemented now. Chapter 4 is an investigation into donor/acceptor pairs involving this class of complexes, which serves as a feasibility test for the use of these complexes in organic photo-voltaics (OPVs) and thin-film field-effect transistors (OTFTs). The mixing of a donor Pt molecule with an electron deficient nitrofluorenone gives rise to new absorption bands in the NIR region. Computational studies of one of the solids suggest that these complexes may have metallic behavior. Chapter 5 demonstrates association in solution, previously unobserved, for Pt(diimine)Cl2 complexes. This chapter is an investigation into the effects of the association mode for this class of complexes on the absorption and emission properties. One of the complexes was used as the emitter in organic light emitting diodes (OLEDs). The results of this study show that these complexes have tunable absorption and emission energies that are concentration dependant. The concentration dependence of the absorption and emission energies is utilized in the OLED device where association enhances the performance.

The focus of this thesis is a development of an electronic guiding unit for a mount of an astronomical telescope allowing observations of artificial satellites orbiting the Earth. It contains a theoretical study of methods developed for the description of positions of objects observable on the celestial sphere, including systems used for storage of this information and regaining it in order to point the telescope in a specific direction. The work includes an analysis of the present supply of commercial devices, followed by a detailed description of the design developed here and its components. Finally, there is outline of possibilities of a future development of the system, focusing on software components.

This master thesis deals with the importance of testing of plastic parts in the automotive industry. It defines the basic principles and concepts of project management within product validation, specifies the principles in the corporate environment of ATEK s.r.o. Part of the thesis is the creation of a validation plan and a schedule of labory tests for the selected product from the BMW AG G20 project. The work defines the conditions and the execution of selected tests, eg the climate change test according to the BMW standard PR303.5. The tests are then evaluated. The output from the evaluation is a product optimization proposal.

This diploma thesis deals with the design the drive of the feed coordinate portal machining center using a gear rack and pinion. The thesis contains researches from the area of CNC machining centers for non-rotating parts and sliding linear systems. Market analysis of portal machining centers of type of lower gantry with a gear rack and pinion was done. Furthermore, several design variants are proposed in terms of positioning the drive on the machine. These variants were further compared and the best option was selected for the specified machine. Subsequently, the technical calculation of the drive is performed and individual parameters and structural elements are proposed. The thesis also includes a 3D model of the proposed variant and the required drawing documentation.

The diploma thesis consists of a new design of a controlling procedure for a plastic component of a tank. Its theoretical part deals with the potential sources of errors and uncertainties arising from the measuring itself. It also deals with the characteristics of available CMM devices and includes an analysis of the methods assessing the acceptability of the measurement plan. The practical part analyses systematically the current state and proposes a new solution using a program created using a coordinate machine. A comparison of both variants is presented as an output of the thesis.

This thesis deals with predicting the latency between two network nodes, such as the two stations, two servers or server and station. The main reason for adoption of effective latency prediction techniques is the elimination of network load caused by unnecessary repeated transmissios or by direct measurement of the latency. Of the many proposed methods of latency estimation, this thesis is focused on methods using artificial coordinate systems with primary focus on the Vivaldi algorithm. Characteristics of the latency prediction methods and properties of various coordinate systems used in practice are evaluated. The issue of the number of dimensions of space defined only by the latency matrix between nodes is also mentioned. Furthermore, some other systems, based on logical clustering of nearby nodes, are mentioned. Description of simulation software VivaldiMonitor developed as part of the thesis is included. The primary purpose is analysis of the behavior of overlay networks implementing Vivaldi algorithm with less than a few hundred nodes. The Vivaldi algorithm is assessed by several simulations carried out using the aforementioned software.