Orientador: Ataliba Teixeira de Castilho / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Estudos da Linguagem / Made available in DSpace on 2018-08-10T03:47:57Z (GMT). No. of bitstreams: 1 Castro_VandersiSant'Ana_D.pdf: 4135426 bytes, checksum: 5711735dd57d8eb65e3d2f47788e3fce (MD5) Previous issue date: 2006 / Resumo: O dialeto caipira, descrito por Amadeu Amaral em 1920, era falado na antiga província de São Paulo até por volta do final do século XIX. Conforme Amaral, o dialeto, que teve grande vigor, vai perdendo terreno a partir das últimas décadas do século XIX, em conseqüência das profundas alterações que se verificam no meio social, estando ¿condenado a desaparecer em prazo mais ou menos breve¿ (Amaral 1920 / 1982: 42). A previsão de Amaral, todavia, não parece ter se concretizado. Em 1974, Rodrigues (1974) atesta a vitalidade do dialeto na região de Piracicaba. Retomando essa linha de investigação, nosso estudo procura verificar a presença de traços fonéticos e lexicais do dialeto caipira em Minas Gerais e no Paraná, com base nos dados do Esboço de um atlas lingüístico de Minas Gerais (Ribeiro et alii 1977) e do Atlas lingüístico do Paraná (Aguilera 1994). As duas áreas são relevantes para essa investigação pela sua proximidade geográfica com São Paulo e pelas relações históricas que envolvem os paulistas no processo de povoamento desses dois Estados vizinhos. Quanto ao nível fonético, nosso estudo se concentrou em cinco variantes: o ¿r caipira¿ ou retroflexo em final de sílaba e em posição intervocálica; o rotacismo da lateral em final de sílaba e em encontro consonantal; o apagamento do /r/ em final de palavra; a iotização da lateral palatal; a redução da proparoxítona. Quanto ao nível lexical, foram exploradas as possibilidades específicas de cada um dos atlas examinados (ex.: cambota, cuitelo, arco-da-velha). Analisado o corpus, constatamos a ocorrência das cinco variantes fonéticas mencionadas, tanto em Minas como no Paraná. Quatro dessas variantes ¿ o rotacismo, a apócope do /r/, a iotização da lateral palatal e a redução da proparoxítona ¿ mostraram uma distribuição mais geral nas áreas estudadas. Somente o ¿r caipira¿ exibe o caráter de uma variante mais propriamente geográfica no interior de cada território estudado, ocorrendo em áreas que refletem a influência paulista, ou por se encontrarem próximas a São Paulo, e/ou porque historicamente correspondem a áreas de penetração dos paulistas. A ocorrência simultânea das outras variantes fonéticas estudadas e de variantes lexicais nessas áreas contribui para caracterizá-las de forma mais consistente como possíveis áreas de resistência do dialeto caipira. Pesquisas complementares focalizando outras variantes do dialeto caipira poderão verificar a consistência dessa caracterização / Abstract:The Brazilian "Caipira" dialect, described by Amadeu Amaral in 1920, was spoken in what used to be the province of São Paulo until around the end of the XIX century. According to Amaral, this dialect, which was once quite wide-spread, started loosing ground in the final decades of the XIX century, due to the profound changes that occurred in the social milieu, and was "condemned to disappear in a relatively short time" (Amaral 1920 / 1982: 42). Amaral's prediction, however, does not seem to have been fulfilled. In 1974, Rodrigues (1974) verified the vitality of the dialect in the area of Piracicaba (SP). Continuing with this line of research, the present study investigates the presence of some phonetic and lexical features of the "Caipira" dialect in the Portuguese spoken in the states of Minas Gerais and Paraná (Brazil), based on the data of the Esboço de um atlas lingüístico de Minas Gerais (Ribeiro et alii 1977) and of the Atlas lingüístico do Paraná (Aguilera 1994). These two areas are relevant due to their geographic vicinity to the state of São Paulo, as well as the historic relations, during the process of settlement, of these two neighbouring States with the "Paulistas". On the phonetic level, our study was concentrated on five variants: the "caipira r" (or retroflex r) in intervocalic position and in coda; the replacement of the palatal lateral for a rhotic in coda and in consonant cluster; the deletion of /r/ in word endings; the replacement of [??] for [??]; the reduction of words that bear antepenultimate stress. On the lexical level, we explored the specific possibilities of each one of the atlases under examination (ex.: cambota, cuitelo, arco-da-velha). In our corpus analysis, we have attested the occurrence of all of the five phonetic variants mentioned, both in the states of Minas and Paraná. The last four of these variants have shown a more general distribution in the areas under study. Only the "caipira r" seems to be a true geographic variant in the interior of both territories analysed. It occurs in areas which reflect the influence of the "Paulistas", because these areas are close to the state of São Paulo and/or because historically they are areas where the "Paulistas" had been. The simultaneous occurrence of the other phonetic variants under study as well as of lexical variants in these areas suggests that these are areas of resistance of the "Caipira" dialect. / Doutorado / Linguistica / Doutor em Linguística

Les images angiographiques sont utilisés pour différentes tâches comme le diagnostique, le suivie de pathologies et la planification d'interventions chirurgicales. Toutefois, en raison du faible ratio signal sur bruit et le contenu complexe des données (informations clairsemées), l'analyse des images angiographiques est une tâche fastidieuse et source d'erreurs. Ces différentes considérations ont motivé le développement de nombreuses techniques d'analyse.Les travaux de cette thèse s'organisent autour de deux axes de recherches : d'une part la segmentation des images angiographiques, et d'autre part la modélisation des réseaux vasculaires cérébraux. En segmentation, l'automatisation induit généralement un coût de calcul élevé, alors que les méthodes interactives sont difficiles à utiliser en raison de la dimension et de la complexité des images. Ces travaux présentent un compromis entre les deux approches, en utilisant le concept de segmentation à base d'exemple. Cette stratégie qui utilise les arbres de coupes de façon non standard,conduit à des résultats satisfaisant, lorsqu'elle est appliqué sur des données d'ARM cérébrales 3D. Les approches existantes, en modélisation, reposent exclusivement sur des informations relatives aux vaisseaux. Ces travaux ont exploré une nouvelle voie, consistant à utiliser à la fois les informations vasculaires et morphologiques ( c-à-d structures cérébrales) pour améliorer la précision et la pertinence des atlas obtenus. Les expériences soulignent des améliorations dans les principales étapes du processus de création de l'atlas impacté par l'utilisation de l'information morphologique. Un exemple d'atlas cérébraux a été réalisé. / Angiographie images are useful data for several tasks, e.g., diagnosis, pathology follow-up or surgery planning. However, due to low SNR (noise,artifacts), and complex semantic content (sparseness), angiographie image analysis is a time consurning and error prone task. These consideration have motivated the development of numerous vesse! filtering, segmentation, or modeling techinques.This thesis is organized around two research areas : the segmentation anù the moùeling. Segmentation of cerebral vascular networks from 3D angiographie data remains a challenge. Automation generally induces a high computational cost and possible errors, white interactive methods are hard to use due to the dimension and the complexity of images. This thesis presents a compromise between both approaches by using the concept of example-based segmentation. This strategy, which uses component-trees in a non-standard fashion, leads to promising results, when applied on cerebral MR angiographie data. The generation of cerebrovascular atlases remains a complex and infrequently considered issue. The existing approaches rely on information exclusively related to the vessels. This thesis investigate a new way, consisting of using both vascular and morphological information (i.e. Cerebral structures) to improve the accuracy and relevance of the obtaines vascular atlases. Experiments emphasize improvments in the main steps of the atlas generation process impacted by the use of the morphological information. An example of cerebrovascular atlas obtained from a dataset of MRAs acquired form different acquisition devices has been provided.

An important question at present in particle physics is whether the recently discovered boson with a mass of about 125 GeV is the Standard Model Higgs boson. A Standard Model Higgs boson with a mass of 125 GeV will predominantly decay to b-quark pairs. This work presents the author's contribution to the search with the ATLAS detector for a Standard Model Higgs boson produced in association with a W or Z boson and decaying to b-quark pairs. In order to search for the decay modes ZH → vvb¯b, WH → lvb¯b and ZH → l¯lb¯b, where l is either an electron or muon, events with zero, one or two electrons or muons are considered in 20:3 fb¯1 of 8 TeV LHC data. A Standard Model Higgs boson is not observed decaying to b-quark pairs, although neither is this decay mode ruled out. A Standard Model Higgs boson with a mass of between 110 GeV and 115 GeV is excluded. For mH = 125 GeV the observed (expected) upper limit on the cross- section times the branching ratio is found to be 2.16 (1.07) times the Standard Model prediction. For a Standard Model Higgs boson with a mass of 125 GeV, the best fit signal strength is μ = 1:09 +0:43-0:42 (stat) +0:44-0:37 (syst) = 1:09 +0:61-0:56. The combined results are consistent with a Standard Model Higgs boson with a mass of 125 GeV. The author's own work is presented, including estimation of systematic uncertainties on WH → lvb¯b modelling, and future ATLAS data selection methods for WH → lvb¯b searches. Overviews of underlying theoretical matters and the experimental facilities used are given.

A search for a light charged Higgs boson decaying into cs is presented using data recorded in pp collisions at √s = 7 TeV. The analysis uses a data sample corresponding to an integrated luminosity of 35.3 pb⁻¹ collected by the ATLAS detector at the LHC between June and November 2010. The search is based on the semi-leptonic tt channel searching for the process t → H⁺b where H⁺ → cs⁻. The invariant mass distribution of the dijet system consistent with the hadronic decay of a W⁺ is used to search for a secondary bump from hadronic H⁺ decays. With no observation of the charged Higgs signal, 95% confidence level upper limits on the decay branching ratio of top quarks to charged Higgs bosons are set as a function of the charged Higgs boson mass.

This thesis investigates the prospects of measuring anomalous triple gauge boson couplings in the ATLAS detector at the Large Hadron Collider (LHC). The most general(V ZZ, V = Z, g) vertex is parametrised by four couplings, fV = Z,gi=4,5 , all of which are zero in the Standard Model. Non-zero couplings would manifest themselves as an excess of events in ZZ diboson channels, and, if observed, would be a direct probe of new physics beyond the Standard Model. A set of criteria are outlined to select events recorded by ATLAS in two such channels, ZZ to llll(l = e, mu) and ZZ to llnunu. With 1 fb-1 of integrated luminosity at a centre of mass energy of sqrt(s) = 7 TeV, ATLAS can expect to observe 10+/-1 events in the ZZ to llllchannel, with 0.5+0.9-0.2 background events. In the ZZ to llnunu channel, 6.2+/-0.7 signal events are expected, with a background of 1.9+2.0-0.2 events. The expected sensitivity of ATLAS to non-zero anomalous couplings is calculated by performing extended, unbinned maximum-likelihood fits to the Z boson transverse momentum spectrum. For 1 fb-1 of integrated luminosity at sqrt(s) = 7 TeV, ATLAS has the potential to place constraints on the coupling parameters of |fZi | < 0.06 and |fig | < 0.07 at the 95% confidence level. These limits assume a form factor with a cutoff of Lambda_FF = 1.2 TeV. As a prelude to ZZ observation, criteria are defined to select Z to ll(l = e, mu) events in the first 315 nb-1 of ATLAS pp collision data at sqrt(s) = 7 TeV. In total 57 events are observed in the electron channel, with 109 in the muon channel, leading to cross-section measurements of sigma (Z to ee) = 0.70+/-0.09 (stat)+/-0.10 (syst)+/-0.08 (lumi) pband sigma(Z to mumu) = 0.90+/-0.09 (stat) +/-0.07 (syst) +/-0.10 (lumi) pb, both of which are consistent with the Standard Model predictions. In addition, this thesis presents a summary of developments made to the Data Acquisition (DAQ) system of the ATLAS Semiconductor Tracker (SCT). These include the construction of a test system, involving a scaled-down version of the entire SCT readout chain. The test system was subsequently used to develop a number of new DAQ features, including a hardware-based event simulator and monitoring framework.

For several theoretically and experimentally motivated reasons, super- symmetry (SUSY) has for some time been identified as an interesting candidate for a theory of fundamental particle physics beyond the Stan- dard Model. The ATLAS collaboration, of which I am a member, possess a detector emplaced in the Large Hadron Collider experiment at CERN. If SUSY does in fact describe our universe, then it is hoped that evidence of it will be visible in data collected in the ATLAS detector. I present an analysis looking for a particular signature that could indicate the presence of SUSY; events containing two like-charge leptons (e or μ). This signature benefits from having both low Standard Model backgrounds as well as potential to observe several SUSY scenarios, par- ticularly those involving strong production processes. These include pair production of squarks and gluinos. The latter of these are particularly relevant for the analysis presented herein since gluinos are Majorana fermions; hence they can decay to produce like-charge leptons. The analysis considers several SUSY production topologies determined from a variety of simplified and phenomenological models. One of the core pieces of any ATLAS analysis is estimating the expected backgrounds in the signal regions. These backgrounds arise both from known Standard Model production processes that can produce the same final state as the SUSY models being targeted, as well as detector mismeasurement effects. One important background in the like-charge analysis is that of “fake” leptons; these are jets that have been misclassified as either electrons or muons by the reconstruction algorithms. A large portion of this thesis is dedicated to introducing novel techniques for robustly estimating these backgrounds, and evaluating their relative performance.

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Orientador: Luís Gustavo Gosuen Gonçalves Dias / Resumo: O objetivo desse estudo foi comparar, após avaliação biomecânica sob carga de flexão ventral, quatro técnicas de estabilização ventral da articulação atlantoaxial de cães, utilizando corpos de prova prototipados e guias de perfuração tridimensionais atlantoaxiais (GP3DAA). Vinte e oito corpos de prova, os quais representavam modelos caninos de atlas e áxis em condição de subluxação por agenesia do processo odontoide, foram impressos tridimensionalmente em ácido poli-lático e distribuídos igualmente em quatro grupos. Cada grupo representava uma técnica de estabilização ventral da articulação atlantoaxial: parafusos poliaxiais, parafusos transarticulares com efeito compressivo, múltiplos parafusos e cimento ósseo (PMMA) e nova placa atlantoaxial. Três GP3DAA foram confeccionados e cada qual foi utilizado durante a execução de uma das seguintes técnicas: parafusos poliaxiais, parafusos transarticulares e múltiplos parafusos e PMMA. Ao término das implantações, os corpos de prova foram submetidos à avaliação biomecânica sob carga de flexão ventral e, após obtenção dos resultados, foi possível comparar as técnicas. Todos os quatro métodos de estabilização foram capazes de realizar o suporte de carga fisiológica sem indícios de falha, todavia, o método de múltiplos parafusos e PMMA revelou-se significativamente mais rígido (p≤0,05) que as demais técnicas. A construção cimentada também foi a que melhor resistiu ao aumento agudo de carga de flexão ventral, suportando força máxima sig... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The aim of this study was to compare, after biomechanical evaluation under ventral flexion load, four ventral stabilization techniques of the atlantoaxial joint of dogs, using 3D printing prototypes and atlantoaxial three-dimensional drill guide (AA3DDG). Twenty-eight prototypes, which represented atlas and axis models of dogs in subluxation condition due to agenesis of the odontoid process, were printed three-dimensionally in polylactic acid and distributed into four groups. Each group represented a ventral stabilization technique of the atlantoaxial joint: poliaxial screws, transarticular lag screws, multiple screws and bone cement (PMMA) and a novel atlantoaxial plate. Three AA3DDG were manufactured and each was used while performing one of the following techniques: poliaxial screws, transarticular lag screws and multiple screws and PMMA. After performing the techniques, the prototypes were submitted to biomechanical evaluation under ventral flexion load and, after obtaining the results, it was possible to compare the techniques. All four stabilization methods were able to perform physiological load support without evidence of failure, however, the multiple screws and PMMA method proved to be significantly more rigid (p≤0.05) than the other techniques.The cemented construction was also the one that best resisted the acute increase in the load of ventral flexion, supporting maximum force significantly greater (p≤0.05) than the other methods. There was no statistical differe... (Complete abstract click electronic access below) / Mestre

京都大学 / 0048 / 新制・課程博士 / 博士(理学) / 甲第21563号 / 理博第4470号 / 新制||理||1641(附属図書館) / 京都大学大学院理学研究科物理学・宇宙物理学専攻 / (主査)教授 中家 剛, 教授 鶴 剛, 准教授 吉岡 興一 / 学位規則第4条第1項該当 / Doctor of Science / Kyoto University / DFAM

Le LHC entrera dans sa phase à haute luminosité vers 2027 et pour profiter de l’augmentation importante du taux de collisions, ATLAS, et plus particulièrement son trajectographe doivent être améliorés en terme de résistance aux radiations et traitement de données à un taux accru. Grace au nouveau design du trajectographe at à l’amélioration d’algorithmes d’étiquetage des saveurs de jets, l’identification de jets issus de la désintégration de B hadrons sera facilitée et des canaux de physique possédant des quarks b dans leurs états finaux seront plus facilement accessible, parmi lesquels le couplage trilinéaire du boson de Higgs. La résistance aux raditions des capteurs à pixels en silicium joue un rôle primordial dans leur utilisation auprès des experience LHC. La quantification de l’impact des rayonnements sur les capteurs silicium est un enjeu crucial : un outil de digitisation des dommages des rayonnements a été développé pour modéliser l’impact des radiations dans les simulations Monte Carlo d’ATLAS. Le test de capteurs à pixels planaires, développés par le LPNHE et la fonderie FBK, constitue la partie principale de cette thèse. Les trois productions de capteurs testées possèdent plusieurs designs technologiques. Pour maximiser l’acceptance géométrique du détecteur, des capteurs à bord mince ont été développés. Deux options de polarisation durant les phases de test ont ausssi été étudiée. Les capteurs ont été testés à plusieurs phases d’irradiation. L’optimisation d’algorithme de b-tagging basé sur la reconstruction de vertex secondaire sera aussi présentée, ainsi qu’une étude concernant les performances du b-tagging à haut pT . / By 2027, the LHC will enter its high luminosity regime, providing protons protons collisions at an unprecedented rate. The LHC experiments whill have to be upgraded to cope with this higher data rate. The new ATLAS Inner Tracker (ITk) will allow a better identification of b-quarks and interesting physics signature with b-quarks in the final states such as the Higgs trilinear coupling will be reachable. The work performed during this thesis consisted in testing planar pixel sensors for the ITk, as well as optimizing b-tagging algorithms. In parallel, a study on the radiation damage on silicon pixel sensors have been performed. The radiation hardness of silicon sensors plays a determinant role as it allows them to be efficient in the highly radiative environment at LHC. Understanding the impact of radiation in silicon sensors is a major challenge and a radiation damage digitizer which models radiation damage effects in ATLAS Monte Carlo simulations is currently developed by the ATLAS experiment. Three ITk silicon planar pixel sensors productions of LPNHE and FBK have been developed, produced and tested on beam. Sensors from these three productions aim to be part of the ITk and have to demonstrate good performance after being irradiated at high fluences. Several technological designs have been investigated, such as temporary metal biasing option and active edges which maximize the geometrical acceptance of the sensors. The optimization of b-tagging SV1 algorithm (a secondary-vertex based algorithm) will be pre- sented as well as a study on the extrapolation of b-tagging performances at high pT.