<p>Synthesis of terrains with complex features has been a challenging problem in computer graphics since most of the existing methods are based on the height field representation. Complex features in terrains adds to the overall realism of the terrain. Hence, there is a need to synthesize terrains in real-time with complex features that adhere to user input. The methodology described in this thesis describes a novel way to synthesize terrains with complex features based on user drawn sketches. Layered stack data structure is used to ensure that the resulting terrain has complex features. Since, Neural Networks are used to generate the terrains, the process is real-time.</p>

A structure comprised of two arches that lean against each other at the apex is considered. The arches are thin shells with internal pressure. This type of structure with solid arches has been used in bridges, such as the Gateway Arch Bridge in Columbus, Indiana, U.S.A., the Monongahela River Bridge in Pittsburgh, Pennsylvania, U.S.A., and a pedestrian bridge at the Pacific Tower in Paris, France. A series of leaning arches was incorporated in the frame of the Museum of the Moving Image, a temporary structure in London, England, during 1992-1994. Pressurized arch-shells made of a flexible material have been utilized as part of the framework for some transportable tent-like structures. The behavior of a pair of pressurized leaning arch-shells with various tilt angles, boundary conditions, and loads is investigated numerically. Several types of loads are considered, including uniformly-distributed vertical loads applied over all or half of the structure (representing snow), and wind loads on the structure. The arches are pinned or fixed to the ground. Deflections, vibrations, and stability of the structures are investigated using the finite element method. The effect of the tilt angle on the response is examined, and buckling may occur for some tilt angles under vertical loading. This type of structure has not been used widely, but may be effective for various applications. / Master of Science

O intuito deste trabalho foi avaliar as alterações dimensionais das arcadas dentárias de crianças portadoras de fissuras labiopalatinas na fase de dentição decídua completa, comparando-as entre si com um grupo controle. As dimensões estudadas foram: distância intercaninos, distância intermolares, perímetro do arco e comprimento do arco, tanto na arcada superior quanto na inferior. Selecionou-se 64 (sessenta e quatro) crianças portadoras de fissuras de lábio e/ou palato, formando o Grupo de Estudo, e 20 (vinte) crianças sem deformidades, formando o Grupo Controle. O Grupo de Estudo foi distribuído em quatro tipos de fissura: Fissura Labiopalatina Unilateral, Fissura Labiopalatina Bilateral, Fissura de Lábio e Fissura de Palato. Após a obtenção de modelos em gesso, foram demarcados os pontos necessários para que as mensurações pudessem ser realizadas. Utilizou-se um paquímetro digital da marca Mytutoio para a determinação das medidas, que foram executadas duas vezes pelo mesmo operador em oportunidades diferentes, sendo registrada a média aritmética. Os resultados obtidos foram tabelados e submetidos à análise estatística, permitindo concluir que a arcada dentária maxilar de indivíduos fissurados apresentou maiores alterações dimensionais no sentido transversal, enquanto a arcada dentária mandibular não demonstrou alterações significativas; o tipo de fissura com as maiores alterações dimensionais foi a fissura labiopalatina bilateral, e a que mostrou menor comprometimento da morfologia das arcadas dentárias foi a fissura de lábio; a fissura de palato foi a que mais apresentou relativa alteração compensatória na arcada dentária inferior. / The aim of this work was to evaluate the dimensional changes in dental arches of cleft lip and palate children during the complete deciduous dentition phase, comparing one to each other and with a group control. The studied dimensions were: intercanine distance, intermolar distance, perimeter and length arch both in superior and inferior arches. The studied group was constituted through the selection of 64 (sixty four) cleft lip and/or cleft palate children and 20 (twenty) children without deformities which constituted the control group. The study group was distributed in four types: unilateral cleft lip and palate, bilateral cleft lip and palate, cleft lip and cleft palate. After the obtaining of plaster models, points were demarcated in order to allow measurements. A digital pachymeter (Mytutoio) was used for measure determination, that was performed twice by the same operator in different opportunities, being registered the arithmetic mean value. The obtained results were registered and submitted to statistical analysis being possible to conclude that maxillary dental arch presented larger dimensional changes in the traverse direction while mandibular dental arch didn't demonstrate significant change. The largest dimensional change was observed in bilateral cleft lip and palate and the smaller compromising in dental arch morphology was verified in cleft lip. The palate cleft presented larger relative compensatory change in the inferior dental arch.

Leon Battista Alberti's church of Sant' Andrea in Mantua has been closely studied by many Renaissance scholars in relation to its layout, dimensions, proportions, chronology, style and aesthetics, as well as earning its place in both Alberti's corpus and the sweep of Renaissance architecture. The thesis investigates how eloquence is embodied in the sequential repetition of the triumphal arch motif between inside and outside. This thesis it is based on extensive and critical review of historical and theoretical literature. It marks a close examination of Sant?Andrea and to lesser extent San Francesco in Rimini, revisiting key ideas, texts and words. The principal finding of the thesis is that Alberti?s concept of respondeo, as developed in De Re Aedificatoria is the key to understanding the triumphal arch motif and its repetition in the interior. The thesis also comprehensively outlines the variety of contexts in which repondeo can be understood. This term, correlated to the passing of time and to rhetorical-based Albertian terms as decorum and convenio, means a 'sensitive suitability' between parts. The analysis of the triumphal arch motif of Sant?Andrea suggests that formalism has played a more important role in Alberti's design for this church than previously believed. This is by the motif's rigorous outline changing between the interior nave and the exterior fa??ade according to the observer's different visual perceptions. The rhetorical structure of the triumphal arch, in the way that it moves became from two to three dimensions in the fa??ade, seeks familiarity with the city's surrounding environment to establish simultaneity of actions. In this way, by joining the historical-religious point of references to a strategy of perception, the triumphal arch achieves public consensus. This rhetorical program is addressed especially by the patron of the church of Sant' Andrea Ludovico Gonzaga II also the ruler of Mantua with popular aspects of his public representations.

Leon Battista Alberti's church of Sant' Andrea in Mantua has been closely studied by many Renaissance scholars in relation to its layout, dimensions, proportions, chronology, style and aesthetics, as well as earning its place in both Alberti's corpus and the sweep of Renaissance architecture. The thesis investigates how eloquence is embodied in the sequential repetition of the triumphal arch motif between inside and outside. This thesis it is based on extensive and critical review of historical and theoretical literature. It marks a close examination of Sant?Andrea and to lesser extent San Francesco in Rimini, revisiting key ideas, texts and words. The principal finding of the thesis is that Alberti?s concept of respondeo, as developed in De Re Aedificatoria is the key to understanding the triumphal arch motif and its repetition in the interior. The thesis also comprehensively outlines the variety of contexts in which repondeo can be understood. This term, correlated to the passing of time and to rhetorical-based Albertian terms as decorum and convenio, means a 'sensitive suitability' between parts. The analysis of the triumphal arch motif of Sant?Andrea suggests that formalism has played a more important role in Alberti's design for this church than previously believed. This is by the motif's rigorous outline changing between the interior nave and the exterior fa??ade according to the observer's different visual perceptions. The rhetorical structure of the triumphal arch, in the way that it moves became from two to three dimensions in the fa??ade, seeks familiarity with the city's surrounding environment to establish simultaneity of actions. In this way, by joining the historical-religious point of references to a strategy of perception, the triumphal arch achieves public consensus. This rhetorical program is addressed especially by the patron of the church of Sant' Andrea Ludovico Gonzaga II also the ruler of Mantua with popular aspects of his public representations.

Made available in DSpace on 2016-08-03T16:31:06Z (GMT). No. of bitstreams: 1 Yasushi pag 1-29.pdf: 132580 bytes, checksum: adb72e19972c5c776c9912632e6b77c1 (MD5) Previous issue date: 2007-03-08 / The concern with the study of dental arches shapes and dimensions has been always present in the orthodontic science. The first article published on lingual orthodontics, a technique which arose in the last 1970s, was authored by Fujita and discussed the dental arch wire form to be used and described it as like as a mushroom form. Despite the fact that this technique has been spread more intensively in recent years as a definite and efficient esthetic solution, the related studies has focused mainly on new materials manufacturing, lingual appliances installation techniques and clinical solutions, with few mentions on dental arches morphology. The present research work objects to study dental arches shapes and dimensions in leucoderm subjects with normal occlusion. Forty seven pairs of normal occlusion dental casts (either upper and lower arches) were used, all were trimmed and digitalized for better examining of the occlusal surfaces. Reference points were marked as well as some virtual ones were created to make possible the measurements, that was accomplished using the CorelDraw 12 computer software. The results determined three lingual dental arch forms: mushroom, Christmas tree and a mix of the two. The Christmas tree arch form showed the major prevalence as a whole, but when the samples were analyzed separately, that is the upper and lower lingual arches, it was found a major prevalence of the mushroom arch form in the upper arches and, conversely, a Christmas tree arch form in the lower ones. As a consequence, this was the greater combination among upper and lower lingual dental arches. Considering this result we proposed the build up of templates for lingual orthodontic arch wires shaping, based on the sample values, determining quarters 1, average and 3, as the values to define sizes small, medium and large. / A preocupação com o estudo das formas e dimensões das arcadas dentárias sempre esteve presente na ciência ortodôntica. Para a Ortodontia Lingual, que surgiu no final da década de 70, o primeiro artigo publicado foi o Fujita, onde relatou sobre a forma do arco a ser utilizado nesta técnica, a forma de cogumelo. Apesar de estar sendo divulgada de uma maneira mais intensa nestes últimos anos como uma solução estética definitiva e eficaz, o enfoque dos estudos sobre esta técnica tem sido a fabricação de novos materiais, técnicas de montagem do aparelho lingual e soluções clínicas, com poucas menções sobre a morfologia das arcadas dentárias. O presente trabalho tem a finalidade de estudar as formas e dimensões linguais das arcadas dentárias de indivíduos leucodermas com oclusão normal. Foram utilizados 47 pares de modelos de gesso de oclusão normal digitalizados pela face olcusal, previamente desgastadas até o terço médio da coroa para proporcionar melhor visualização. Por meio do programa CorelDraw 12 foram determinados pontos de referências e criados alguns pontos virtuais necessários para a realização das medidas. Os resultados determinaram três formas das arcadas dentárias linguais: cogumelo, árvore de Natal e mista. A maior prevalência foi a forma árvore de Natal, mas quando analisadas separadamente as arcadas dentárias linguais, encontrados no superior, maior prevalência da forma de cogumelo e no inferior da forma árvore de Natal. Conseqüentemente, esta foi a combinação mais prevalente entre as arcadas dentárias linguais superiores e inferiores. Propusemos diagramas para conformação de arcos ortodônticos linguais com base nos valores obtidos da amostra, determinando-se o quartil 1, mediana e quartil 3, como definidores dos tamanhos pequeno, médio e grande.

O intuito deste trabalho foi avaliar as alterações dimensionais das arcadas dentárias de crianças portadoras de fissuras labiopalatinas na fase de dentição decídua completa, comparando-as entre si com um grupo controle. As dimensões estudadas foram: distância intercaninos, distância intermolares, perímetro do arco e comprimento do arco, tanto na arcada superior quanto na inferior. Selecionou-se 64 (sessenta e quatro) crianças portadoras de fissuras de lábio e/ou palato, formando o Grupo de Estudo, e 20 (vinte) crianças sem deformidades, formando o Grupo Controle. O Grupo de Estudo foi distribuído em quatro tipos de fissura: Fissura Labiopalatina Unilateral, Fissura Labiopalatina Bilateral, Fissura de Lábio e Fissura de Palato. Após a obtenção de modelos em gesso, foram demarcados os pontos necessários para que as mensurações pudessem ser realizadas. Utilizou-se um paquímetro digital da marca Mytutoio para a determinação das medidas, que foram executadas duas vezes pelo mesmo operador em oportunidades diferentes, sendo registrada a média aritmética. Os resultados obtidos foram tabelados e submetidos à análise estatística, permitindo concluir que a arcada dentária maxilar de indivíduos fissurados apresentou maiores alterações dimensionais no sentido transversal, enquanto a arcada dentária mandibular não demonstrou alterações significativas; o tipo de fissura com as maiores alterações dimensionais foi a fissura labiopalatina bilateral, e a que mostrou menor comprometimento da morfologia das arcadas dentárias foi a fissura de lábio; a fissura de palato foi a que mais apresentou relativa alteração compensatória na arcada dentária inferior. / The aim of this work was to evaluate the dimensional changes in dental arches of cleft lip and palate children during the complete deciduous dentition phase, comparing one to each other and with a group control. The studied dimensions were: intercanine distance, intermolar distance, perimeter and length arch both in superior and inferior arches. The studied group was constituted through the selection of 64 (sixty four) cleft lip and/or cleft palate children and 20 (twenty) children without deformities which constituted the control group. The study group was distributed in four types: unilateral cleft lip and palate, bilateral cleft lip and palate, cleft lip and cleft palate. After the obtaining of plaster models, points were demarcated in order to allow measurements. A digital pachymeter (Mytutoio) was used for measure determination, that was performed twice by the same operator in different opportunities, being registered the arithmetic mean value. The obtained results were registered and submitted to statistical analysis being possible to conclude that maxillary dental arch presented larger dimensional changes in the traverse direction while mandibular dental arch didn't demonstrate significant change. The largest dimensional change was observed in bilateral cleft lip and palate and the smaller compromising in dental arch morphology was verified in cleft lip. The palate cleft presented larger relative compensatory change in the inferior dental arch.

Cette thèse a pour objet l'architecture de passage qui ponctuait le parcours d'un visiteur ou d'un citoyen au sein du paysage urbain micrasiatique : propylées, portes urbaines et arcs sur rue. Notre travail portait sur les cités d'Asie Mineure, sans cadre géographique restrictif, afin d'obtenir une vision globale du phénomène étudié. L'étude a été partagée en deux grands ensembles : les propylées d'un côté et les portes urbaines et arcs sur rue d'un autre. Les propylées constituaient les entrées monumentales de sanctuaires, agoras, gymnases et bouleutérions. Notre étude comprend les propylées depuis l'époque classique jusqu'à l'époque romaine. Les propylées classiques constituaient essentiellement les entrées monumentales des grands sanctuaires-terrasses hécatomnides de Carie. A l'époque hellénistique, les propylées se sont multipliés et se trouvaient désormais en contextes cultuels et profanes. Les propylées romains représentaient pour la plupart des entrées monumentales rajoutées à des complexes préexistants, peu appartenaient à un nouveau complexe. Nous trouvons des propylées qui reprenaient des formules de l'époque hellénistique, des propylées à façade monumentale édiculée, des propylées qui adoptaient la forme de l'arc romain et enfin des propylées qui reprenaient la forme des salles impériales. Les portes urbaines totalement dépourvues de tout caractère défensif se sont développées grâce au climat de sécurité de la Pax Romana. Elles marquaient la séparation entre l'intérieur et l'extérieur de la ville, constituaient un véritable repère topographique et, comme la première image que le visiteur avait de la ville, elles annonçaient la splendeur de la ville et projetaient la valeur de l'urbanistas. Ces portes urbaines étaient soit de nouvelles portes insérées dans les anciens remparts, soit libres de tout rempart, soit un réaménagement des anciennes portes. Les arcs sur rue étaient construits sur une rue à colonnades ou à un carrefour pour des raisons urbanistiques et organiques et esthétiques. Tout en embellissant un parcours, ils ponctuaient et articulaient celui-ci et servaient aussi de points de repère. Leurs façades, richement décorées, participaient à l'embellissement et à l'animation des paysages urbains. Ces arcs apparaissaient comme une composante d'un programme urbanistique. Certains arcs étaient honorifiques ou commémoratifs. A l'époque romaine, l'architecture de passage reflétait les changements de la vie politique et de la structure sociale. L'autoreprésentation, la propagande impériale et la vive concurrence entre les cités vont jouer un rôle important dans la conception de ces monuments. Leur richesse et leur magnificence devaient impressionner les visiteurs et donc augmenter l'image reflétée par la cité de sa puissance et de sa gloire.Ils participaient donc à l'ornementation de la cité. / This thesis deals with the architecture of passage that punctuate the course of a visitor or a citizen in the urban landscape of Asia Minor : propylaea, city-gates and arches on street. Our work focused on the cities of Asia Minor with no geographical limits in order to provide an overall view of the phenomenon. This study was divided into two major groups : the propylaea on the one hand and city-gates and arches on street on the other hand. The propylaea were the monumental entrances to shrines, agorai, gymnasiums and bouleuteria. Our study includes the propylaea from the classical period to the Roman era. Classical propylaea were mainly the monumental entrances to the major hecatomnid's shrines-terraces of Caria. In the Hellenistic period, the propylaea multiplied and tuned into religious and secular backgrounds. Most Roman propylaea made up monumental entrances added to existing complexes, few being part of a new one. We find some propylaea that went back over formulas of the Hellenistic period, others with monumental edicular façade, those in the form of the a Roman arch and finally the propylaea reproducing the form of "Marmorsaal". City-gates, that were completely devoid of any defensive features, developed in the peaceful period of the Pax Romana. They marked the boundary between the inside and the outside of the city, were a real topographical landmark and, as the first glimpse of the city for the visitors, heralded its splendor and highlighted the value of the urbanitas. These city-gates were either new city-gates inserted into the ancient city-walls, free of any city-walls, or old city-gates rearranged. The street arches were built on a colonnaded street or at a crossroads for urban, organic and aesthetic reasons. While beautifying a course, they structured and punctuated it as well as serving as landmarks. Their richly decorated facades participated in the beautification and animation of the urban landscape. These arches appear as a component of an urban program. Some of them were honorific or commemorative. In Roman times, the architecture of passage reflected changes in the political life and social structure. The self-representation, the imperial propaganda and the fierce competition between cities would play a major part in the designing of these monuments. Their richness and splendor must have impressed visitors and thus enhanced the city's power and glory picture. They participated in its ornamentation.

This thesis deals with the reconstruction of the existing road arch bridge using free transverse prestressing cables. Cables are laid in holes drilled in the shape of strut. The holes routed diagonally across the front wall of the bottom edge of the arch. The work also includes the stability of long front wall. This is solved by means of spacer frames led across the road. The reconstruction can be done partially limited service.

Valvbågar är frekvent förkommande bland historiska byggnadsverk, då det är en gammal byggnadsteknik som tillämpats i flera tusen år. En metod att analysera och dimensionera valvbågar med är trycklinjeanalys. I detta arbete jämfördes två olika valvbågar, den uppmätta bärförmågan jämfört med bärförmågan enligt de teoretiska beräkningarna. Mätningarna utfördes på Linnéuniversitetet och beräkningarna utfördes i programvaran GeoGebra som baseras på trycklinjeanalys. Resultatet från det första testet visade att valvbågen hade en kapacitet på cirka 60 procent av den beräknade kapaciteten. I det andra testet uppnådde valvbågen en kapacitet på cirka 84 procent av den beräknade kapaciteten. Slutsatsen är att det är viktigt att vara noga med att rätt information sätts in i beräkningarna angående valvbågens geometri, om detta inte görs på rätt sätt är risken stor att analysen blir fel. Den viktigaste parametern att ta hänsyn till vid analysen är upplagsförhållanden för valvbågen. Ett sätt att ta hänsyn till eventuella avvikelser från verkligheten och beräkningarna skulle vara att implementera en säkerhetsfaktor i programmet. / Arches is frequently used in historic buildings, since it is an old building technique that has been applied for several thousand years. A method to analyze and design of arches is funicular analysis. In this thesis, two different arches were compared, the measured bearing capacity compared to the bearing capacity to the theoretical calculations. The measurements were carried out at Linnaeus University and the calculations were performed in the GeoGebra software, which is based on funicular analysis. The result of the first test showed that the arch reached a capacity of about 60 percent of the calculated capacity. In the second test, the arch reached a capacity of about 84 percent of the calculated capacity. The conclusion is that it is important to be careful that the correct information is inserted into the calculations regarding the arch geometry, if this is not done correctly, the risk is that the analysis will be wrong. The most important parameter to take into account in the analysis is the support conditions for the arch. One way to take into account any deviations from reality and the calculations would be implemented a safety factor in the program.