Au cours de ce travail, nous nous intéressons aux limites d'échelle de deux classes de cartes. Dans un premier temps, nous regardons les quadrangulations biparties de genre strictement positif g fixé et, dans un second temps, les quadrangulations planaires à bord dont la longueur du bord est de l'ordre de la racine carrée du nombre de faces. Nous voyons ces objets comme des espaces métriques, en munissant leurs ensembles de sommets de la distance de graphe, convenablement renormalisée. Nous montrons qu'une carte prise uniformément parmi les cartes ayant n faces dans l'une de ces deux classes tend en loi, au moins à extraction près, vers un espace métrique limite aléatoire lorsque n tend vers l'infini. Cette convergence s'entend au sens de la topologie de Gromov--Hausdorff. On dispose de plus des informations suivantes sur l'espace limite que l'on obtient. Dans le premier cas, c'est presque sûrement un espace de dimension de Hausdorff 4 homéomorphe à la surface de genre g. Dans le second cas, c'est presque sûrement un espace de dimension 4 avec une frontière de dimension 2, homéomorphe au disque unité de R^2. Nous montrons en outre que, dans le second cas, si la longueur du bord est un petit~o de la racine carrée du nombre de faces, on obtient la même limite que pour les quadrangulations sans bord, c'est-à-dire la carte brownienne, et l'extraction n'est plus requise. / In this work, we discuss the scaling limits of two particular classes of maps. In a first time, we address bipartite quadrangulations of fixed positive genus g and, in a second time, planar quadrangulations with a boundary whose length is of order the square root of the number of faces. We view these objects as metric spaces by endowing their sets of vertices with the graph metric, suitably rescaled.We show that a map uniformly chosen among the maps having n faces in one of these two classes converges in distribution, at least along some subsequence, toward a limiting random metric space as n tends to infinity. This convergence holds in the sense of the Gromov--Hausdorff topology on compact metric spaces. We moreover have the following information on the limiting space. In the first case, it is almost surely a space of Hausdorff dimension 4 that is homeomorphic to the genus g surface. In the second case, it is almost surely a space of Hausdorff dimension 4 with a boundary of Hausdorff dimension 2 that is homeomorphic to the unit disc of R^2. We also show that in the second case, if the length of the boundary is little-o of the square root of the number of faces, the same convergence holds without extraction and the limit is the same as for quadrangulations without boundary, that is the Brownian map.

Cette thèse porte sur l'algorithmique des techniques de décodage en liste, initiée par Guruswami et Sudan en 1998, dans le contexte des codes de Reed-Solomon sur les anneaux finis. Deux approches sont considérées. Dans un premier temps, nous adaptons l'algorithme de décodage en liste de Guruswami-Sudan aux codes de Reed-Solomon généralisés sur les anneaux finis. Nous étudions en détails les complexités de l'algorithme pour les anneaux de Galois et les anneaux de séries tronquées. Dans un deuxième temps nous approfondissons l'étude d'une technique de remontée pour le décodage en liste. Nous montrons que cette derni're permet de corriger davantage de motifs d'erreurs que la technique de Guruswami-Sudan originale. Nous appliquons ensuite cette même technique aux codes de Reed-Solomon généralisés sur les anneaux de Galois et les anneaux de séries tronquées et obtenons de meilleures bornes de complexités. Enfin nous présentons l'implantation des algorithmes en C et C++ des algorithmes de décodage en liste étudiés au cours de cette thèse. Tous les sous-algorithmes nécessaires au décodage en liste, comme la recherche de racines pour les polynômes univariés, l'arithmétique des corps et anneaux finis sont aussi présentés. Indépendamment, ce manuscrit contient d'autres travaux sur les codes quasi-cycliques. Nous prouvons qu'ils sont en correspondance biunivoque avec les idéaux à gauche d'un certain anneaux de matrices. Enfin nous adaptons le cadre proposé par Guruswami et Sudan pour les codes à base d'ideaux aux codes construits à l'aide des corps de nombres. Nous fournissons un algorithme de décodage en liste dans ce contexte.

Ces travaux portent sur le recalage et la fusion d'informations multimodales dans le cadre de l'optimisation de la thérapie de resynchronisation cardiaque (CRT). Des descripteurs locaux du couplage électromécanique cardiaque sont extraits à partir d'informations anatomiques, fonctionnelles, électriques et mécaniques issues de volumes scanner (CT), d'échocardiographie par ''speckle tracking'' (US) et de cartographies électroanatomiques (EAM). L'approche proposée repose sur le recalage des données multimodales sur un modèle 3D+t du ventricule gauche (VG) calculé à partir de surfaces segmentées. Cette approche procède en deux temps : (1) un recalage semi-interactif des données EAM et d'images CT ; (2) un recalage de données US avec le modèle dynamique pour lequel les deux méthodes automatiques (statique et dynamique) ont été développées. Ces techniques intègrent un mode de projection radiale et une interpolation de mise en correspondance temporelle (par Dynamic Time Warping) des données EAM et US. Ces méthodes offrent la possibilité de calculer, sous différents modes de simulation cardiaque, les délais d'activation électrique, les cartes de voltage, les délais mécaniques et les délais électromécaniques locaux. La visualisation (cartographies 3D et 2D) de ces descripteurs permet de caractériser le couplage électromécanique intra-segments du VG. Ces méthodes ont été appliquées sur données simulées et réelles. Elles ont montré leur pertinence quant à la possibilité d'extraire des descripteurs locaux de la fonction cardiaque significatifs pour l'optimisation de la pose de stimulateur en CRT.

This study applied the Process Dissociation Procedure (Bornstein, 2002) to test independence between personality processes represented by different implicit measurement techniques. In contrast to the commonly adopted literal view of dual processes in personality theory, the study predicted that two implicit measures (CRT-A and IAT-A) and one explicit measure (NEO-AH) of aggressive disposition would dissociate with each other in their 1) intercorrelations, 2) predictions of behavioral criteria of aggressiveness, and 3) potential moderation by situational cues. These hypotheses were generally, though not completely, supported. Most importantly, the two implicit measures dissociated in their lack of correlation and differential prediction of behavioral criteria, unaffected by changes in situational cues. As predicted, the CRT-A and the NEO-AH dissociated in their intercorrelations, predictions, and moderation by incentives. The IAT-A and the NEO-AH dissociated in their lack of intercorrelation and their differential moderation by changes in incentive conditions. As predicted, only the explicit measure was moderated by changes in incentive conditions. Unexpectedly, IAT-A and the NEO-AH were statistically indistinguishable in their prediction of behavioral criteria of aggression. The findings provided strong support for the hypotheses predicting multiple independent implicit personality processes.

Η άθροιση μεγάλων αριθμών είναι μια χρονοβόρα και ενεργοβόρα διαδικασία. Πολλές μέθοδοι έχουν αναπτυχθεί για να μειωθεί η καθυστέρηση υπολογισμού του αθροίσματος λόγω της μετάδοσης κρατουμένου. Τέτοιες είναι η πρόβλεψη κρατουμένου (carry look ahead) και η επιλογή κρατουμένου (carry select). Αυτές οι αρχιτεκτονικές δεν είναι επαρκώς επεκτάσιμες για μεγάλους αριθμούς (με πολλά bits) ή πολλούς αριθμούς, διότι παράγονται μεγάλα και ενεργοβόρα κυκλώματα. Στην παρούσα εργασία μελετάται η μέθοδος υπολοίπου (RNS), η οποία χρησιμοποιεί συστήματα αριθμών μεγαλύτερα από το δυαδικό. Ορίζεται μια βάση τριών αριθμών και οι αριθμοί αναπαρίστανται στα εκάστοτε τρία συστήματα της βάσης. Η άθροιση γίνεται παράλληλα σε κάθε σύστημα και τέλος οι αριθμοί μετατρέπονται πάλι στο δυαδικό. Τα πλεονεκτήματα αυτής της προσέγγισης είναι η παραλληλία και η απουσία μεγάλων κυκλωμάτων διάδοσης κρατουμένου. Το μειονέκτημα είναι ότι χρειάζονται κυκλώματα μετατροπής από και προς το δυαδικό σύστημα. Αυτού του είδους οι αθροιστές συγκρίνονται για κατανάλωση ενέργειας με τους γνωστούς carry look ahead και carry select. Διαπιστώθηκε ότι οι RNS αθροιστές καταναλώνουν λιγότερη ενέργεια. / The addition of many-bits numbers is a time and power consuming task. Many methods are developed to reduce the sum calculation delay due to carry propagation. Such techniques are Carry Look Ahead and Carry Select, Those techniques are not scalable to many bits numbers or a set of many numbers: the circuits needed are big and power consuming. In this thesis, the the RNS technique is investigated. This technique uses radix bigger than binary. A 3-numbers base is defined and the numbers that participate in the sum are represented uniquely in each element radix. The addition is performed in parallel in each radix. Finally the result is transformed back to the binary numbers system. The advantages of this technique are the parallelization of the process and the lack of carry propagation circuits. The disadvantage is that transformation circuits are need from/to binary system. The RNS adders are compared to CLA and CS for power. Such adders are compared to CLA and CS for power consumption. It is found that RNS adders consume less energy.

Submitted by Marcia Silva (marcia@latec.uff.br) on 2016-02-03T19:51:59Z No. of bitstreams: 1 Dissert Queila da Costa.pdf: 4793341 bytes, checksum: c506d3b0f1dbda0591f766090f48bde6 (MD5) / Made available in DSpace on 2016-02-03T19:51:59Z (GMT). No. of bitstreams: 1 Dissert Queila da Costa.pdf: 4793341 bytes, checksum: c506d3b0f1dbda0591f766090f48bde6 (MD5) Previous issue date: 2015-10-20 / Nossa sociedade, a cada dia, demonstra sinais de consumismo sem precedentes, basta que haja o lançamento de um equipamento eletrônico, rapidamente as pessoas se mostram interessadas ao ponto de substituir seu equipamento antigo, em pleno funcionamento, por um que acabou de ser lançado. O Brasil é o país que mais gera e-lixo entre os emergentes, com o problema de que a maior parte destes resíduos não tem destinação apropriada e o risco de contaminação para o meio ambiente e a saúde com metais pesados, tais como mercúrio e chumbo são inevitáveis. Os descartes inadequados de artefatos eletroeletrônicos causam impactos ambientais e podem afetar a saúde humana se não for adequadamente gerenciado. No entanto, não se observa uma política voltada para coleta e gestão desses produtos na cidade de Campos dos Goytacazes, principalmente, os tubos de raios catódicos (CRT´s) utilizados em televisores e monitores de computador antigos, que contêm várias substâncias perigosas, gerando um passivo ambiental (danos ambientais) ao meio onde são descartados, representando assim a responsabilidade social das empresas com os aspectos ambientais. Diante deste contexto, propõem-se como objetivo um modelo de gestão para o lixo eletrônico, com destaque para criação de postos voltados para esse fim no Município de Campos dos Goytacazes. Para buscar dados foram aplicados questionários que tiveram como público alvo um percentual da população adulta, moradores de bairros próximos aos pontos de descartes. A pesquisa, a coleta de dados foi realizada entre os meses de dezembro e fevereiro 2013, no terminal rodoviário urbano e entrevistou-se 58 pessoas de diversas faixas etárias e níveis de escolaridade, representando 34 bairros do município de Campos dos Goytacazes, visando levantar dados referentes ao problema da pesquisa. O segundo questionário foi aplicado em 9 lojas da mesma região da cidade, que comercializam monitores e televisores, com o intuito de verificar o interesse destes em incentivar a devolução desses equipamentos ao inicio da cadeia produtiva, tendo as lojas como referência, no caso os consumidores seriam incentivados a levar o equipamento a ser descartado à uma cooperativa subsidiada pelos lojistas pois de acordo com plano nacional de resíduos sólidos(PNRS), são um dos responsáveis na cadeia produtiva, a fim de que o equipamento tenha uma destinação correta. Por fim, foram consultados cinco especialistas para avaliar o modelo proposto e, segundo eles, o modelo funciona para a coleta de televisores e monitores de computador que usam tubo de raios catódicos. Considera-se que as questões de pesquisa foram respondidas, pois se houver união entre os stakeholders para resolver o problema do descarte inadequado no município, com certeza todos ganharão, diminuindo o impacto ambiental com o incentivo de devolução do equipamento velho na compra do novo, isto alimentaria a cooperativa sempre mantendo o setor funcionando com pessoas que não tinham oportunidades, trazendo dignidade e obtendo ganhos com a venda dos resíduos e se mantendo no negócio a fim de fazer parte da estatística de mostrar que a logística reversa funciona se bem administrada, trazendo ganhos para todos: Economia, sociedade e meio ambiente. / Our society, every day, demonstrates unprecedented consumerism signals, just as there is the launch of an electronic device, quickly people are showing an interest so far as to replace your old equipment in full operation, with one that has just been released. Brazil is the country that generates more e-waste among emerging with the problem that most of these residues is not appropriate disposal and the risk of contamination to the environment and health with heavy metals such as mercury and lead They are inevitable. Inadequate disposal of electronic devices cause environmental impacts and can affect human health if not properly managed. However, it is not observed a policy aimed at collecting and managing such products in the city of Campos dos Goytacazes, mainly cathode ray tubes (CRT's) used in old computer monitors and televisions, which contain various hazardous substances, generating environmental liabilities (environmental damage) in half where they are discarded, thus representing the social responsibility of companies with environmental aspects. Given this context, it is proposed aimed at a management model for electronic waste, especially creating jobs geared to this end in the city of Campos dos Goytacazes. To fetch data were questionnaires that had as target a percentage of the adult population, residents of neighborhoods near the point of disposal. The research, data collection was carried out between the months of December and February 2013, the urban bus and was interviewed 58 people of different ages and educational levels, representing 34 districts of Campos municipality of Goytacazes, aiming to collect data referring to the problem of search. The second questionnaire was applied in 9 stores in the same area of the city that sell monitors and televisions, in order to verify the interest of these to encourage the return of such equipment to the beginning of the production chain, with stores like reference in case consumers would be encouraged to take the equipment to be disposed of to a cooperative subsidized by tenants as according to national plan for solid waste (PNRS), they are one of those responsible in the production chain, so that the equipment has proper destination. Finally, five experts were consulted to evaluate the proposed model and according to them, the model works for the collection of televisions and computer monitors that use cathode ray tube. It is considered that the research questions were answered, as if there is unity among stakeholders to address the improper disposal of problem in the city, surely everyone wins, reducing the environmental impact with the old equipment back incentive on the purchase of new, this would feed the cooperative keeping the industry working with people who had no opportunities, bringing dignity and getting gains from the sale of waste and keeping the business in order to be part of the statistics show that the reverse logistics work if well managed, bringing gains for all: Economy, society and environment.

The current research study investigates the predictive value of two frequently-used benchmark reading assessments: Developmental Reading Assessment (DRA) and the Dynamic Indicators of Basic Early Literacy Skills (DIBELS). With an increasing emphasis on high-stakes testing to measure reading proficiency, benchmark assessments may assist in predicting end-of-year performance on high-stakes testing. Utah's high-stakes measurement of end-of-year reading achievement is the English Language Arts Criterion-Referenced Test (ELA-CRT). A Utah urban school district provided data for students who completed the DRA, DIBELS, and ELA-CRT in the 2005-2006 school year. The primary purpose of the study was to determine the accuracy to which the Fall administrations of the DRA and the DIBELS predicted performance on the ELA-CRT. Supplementary analysis also included cross-sectional data for the DIBELS. Results indicated that both Fall administrations of the DRA and the DIBELS were statistically significant in predicting performance on the ELA-CRT. Students who were high risk on the benchmark assessments were less likely to score proficiently on the ELA-CRT. Also, demographic factors did not appear to affect individual performance on the ELA-CRT. Important implications include the utility of data collected from benchmark assessments to address immediate interventions for students at risk of failing end-of-year, high-stakes testing.

No description available.

<p>Throughout my project, I focus on contemporary young adult historical fantasies that engage with legacies of systemic racism and Western Imperialism—a publishing trend that has developed due to an increased call for stories of racial inclusion in YA literature. These texts aim to create a more inclusive historical imagination by telling fictionalized histories that center people of color. Given the current political climate surrounding Critical Race Theory, my project analyzes how these texts both challenge and inadvertently perpetuate the logic of systemic racism. I argue that these historical fantasies attempt to acknowledge and untangle legacies of racism for audiences who, in the face of today’s reactionary political climate, may very well not be taught about them in their schools. My approach focuses on how, in their exploration of racism, these novels attempt corrective representation in the context of current social justice and racial reckoning movements, and grapple with the legacy of institutional racism in the here and now. As such, my project argues that we not only need diverse books in Western young adult fiction, but we also need more books that are willing to confront the persistent problems of systemic racism without perpetuating racial stereotypes or Eurocentric viewpoints. </p>

No description available.