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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
471

O discurso da arte em Goiás: entre permanências e desejos (1990-2012)

Moraes, Bárbara Lopes January 2013 (has links)
A presente pesquisa busca compreender a elaboração de um discurso institucional sobre arte em Goiás no período de 1990 a 2012, a partir dos agentes envolvidos nos museus e galerias de arte do Estado, e os artistas em destaque e circulação neste circuito artístico. Para tanto, retomo alguns processos históricos e políticos vinculados à construção de Goiânia apresentando o projeto de modernidade com o qual Goiás envolveu-se na criação de suas primeiras instituições culturais e artísticas. Esse discurso foi contraposto, durante os anos 90, por uma nova produção que promoveu um intenso trânsito pelo país através de salões, prêmios e exposições. Diante deste panorama, a partir da década de 2000, observa-se a entrada de alguns agentes nas instituições artísticas pesquisadas e o processo de incorporação da produção contemporânea que desencadeiam. Ao operarem a legitimação de artistas e obras, eles, concomitantemente, realizam sua própria legitimação dentro do circuito e, por conseguinte, a institucionalização da arte contemporânea no Estado. Para proceder o exame das questões modernas e contemporâneas proponho como chave interpretativa a ideia de continuidade, mais que de ruptura. Como suporte metodológico foi usado o paradigma indiciário para análise dos dados coletados como exposições e/ou salões, agentes envolvidos e em trânsito por estas instituições e os artistas e obras que são incorporadas aos acervos museológicos da região, demonstrando um movimento direcionado mais no sentido do deslocamento. / This research attempted to understand how the people - from the agents involved in the museums and art galleries in the state to the artists who were prominent in this artistic circuit - elaborated an institutional discourse about art in Goiás in the period between 1990 and 2012. In order to do that, I retook historical and political processes related to the construction of Goiânia by introducing what was the project of modernity with which Goiás became involved on the creation of its first cultural and artistic institutions. These discourse was rejected by a new production that promoted an intense displacement through the country in awards and exhibitions during the nineties. Some agents entered the researched artistic institutions and unleashed the contemporary production incorporation process from the year 2000 because of this scenario. At the same time that they operated the legitimacy of artists and works, they held their own legitimization within the circuit; as a result, they legitimated the institutionalization of contemporary art in Goiás. I propose the idea of continuity rather than a rupture as a interpretation key to conduct the examination of these phenomenon related to modern and contemporary issues. The methodological support was based on the evidence paradigm for data collected analysis such as the exhibitions, the agents involved and in transit through the institutions, and the artists and works that are incorporated into museum collections in the region, affirming a movement that is more directed towards displacement.
472

Adesivo à base de poliuretano para reparação pós-cirúrgica do disco intervertebral

Dall Angol, Lucas 05 July 2018 (has links)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPES
473

“... E eu pensei: o que estou fazendo aqui?!” homens egressos do curso de pedagogia: estabelecimento e deslocamento na profissão. / "... And i thought: what am i doing here ?!" homeless people of the course of pedagogy: establishment and displacement in the profession.

Straiotto, Débora Silva 05 May 2017 (has links)
Submitted by Erika Demachki (erikademachki@gmail.com) on 2017-06-14T17:55:39Z No. of bitstreams: 2 Dissertação - Débora Silva Straiotto - 2017.pdf: 3661666 bytes, checksum: d1002de27ce38738e29500ae0e72a1e6 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Erika Demachki (erikademachki@gmail.com) on 2017-06-29T18:26:12Z (GMT) No. of bitstreams: 2 Dissertação - Débora Silva Straiotto - 2017.pdf: 3661666 bytes, checksum: d1002de27ce38738e29500ae0e72a1e6 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-06-29T18:26:13Z (GMT). No. of bitstreams: 2 Dissertação - Débora Silva Straiotto - 2017.pdf: 3661666 bytes, checksum: d1002de27ce38738e29500ae0e72a1e6 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-05-05 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The objective of this research was to understand the reasons that led these graduates to establish themselves or to become part of the Pedagogy course of the Federal University of Goiás - Regional de Catalão (UFG / RC), formed between 1991 and 2014. To move from the area of practice allowed by the profession of pedagogue. The unfolding of the general objective allowed to broaden the discussion about the historical trajectory of the Pedagogy course, which includes the change in the qualifications, in Brazil and in Catalão, articulating the latter with the own history of implantation of the advanced Campus of the UFG in that city. This work also discussed "gender" and "masculinity", trying to understand the point of view of the egresses about the relations between the genders and how these are in the field of their professional choices. The research made it possible to undertake a quantitative and qualitative mapping of the men graduating from the Pedagogy course of the UFG / RC in the last decades, as well as the promotion of a bibliographical analysis about the male sex in the education of young children and the feminization of the teaching profession. For documentary analysis, institutional documents were used, such as the Political pedagogical projects of the Pedagogy course and the production of interviews with the graduates participating in the research. From a methodological point of view, we chose case studies, through interviews and also quantification and analysis of the data. At the end of the research, we found that despite the difficulties encountered, a significant number of graduates remained in the area of activity of the pedagogue. / Tomando como objeto de análise os homens egressos do curso de Pedagogia da Universidade Federal de Goiás – Regional de Catalão (UFG/RC), formados entre 1991 e 2014, esta pesquisa teve como objetivo compreender as razões que levaram esses egressos a se estabelecerem ou a se deslocarem da área de atuação permitida pela profissão de pedagogo. Os desdobramentos do objetivo geral permitiram ampliar a discussão sobre a trajetória histórica do curso de Pedagogia, na qual se incluem a mudança nas habilitações, no Brasil e em Catalão, articulando esta última com a própria história de implantação do Campus avançado da UFG naquela cidade. Este trabalho também discutiu “gênero” e “masculinidade”, procurando compreender o ponto de vista dos egressos sobre as relações entre os gêneros e como estas se dão no campo de suas escolhas profissionais. A pesquisa permitiu empreender um mapeamento quantitativo e qualitativo dos homens egressos do curso de Pedagogia da UFG/RC ao longo das últimas décadas, bem como a promoção de uma análise bibliográfica acerca do sexo masculino na educação de crianças pequenas e a feminização do magistério. Para análise documental foram utilizados documentos institucionais, como os Projetos político pedagógico do curso de Pedagogia e a produção de entrevistas com os egressos participantes da investigação. Do ponto de vista metodológico optou-se por estudos de caso, através de entrevistas e, ainda, quantificação e análises dos dados. Ao final da pesquisa descobrimos que um número significativo de egressos permaneceu na área de atuação do pedagogo.
474

Trânsito de identidades e estratégias de negociação familiar: deslocamentos populacionais entre a Bolívia e o Brasil / Traffi of identity and trading strategies familiar: displacement between Bolivia and Brazil

Vanessa Generoso Paes 29 November 2011 (has links)
Esta dissertação analisa a questão dos deslocamentos emigratórios latinos americanos a partir das histórias orais de vida de uma família de bolivianos residente na cidade de São Paulo e de sua rede social afetiva. Além disso, estabelece um diálogo com as entrevistas dos pesquisadores bolivianos por meio da história oral temática confeccionada para este trabalho. Ao utilizar dois gêneros de historia oral, temos como perspectiva que esta dissertação contribua para os estudos migratórios contemporâneos. A temática central dessa pesquisa é verificar com se dá o processo de negociação de identidades entre a primeira e segunda geração da família boliviana escolhida para tal estudo, assim como entender o processo de mediação das identidades dos emigrantes com a sociedade brasileira. As identidades e as trajetórias de vida são concebidas como heterogêneas, em processo, em trânsito, articuladas por zonas de contato e trocas culturais. As memórias dos colaboradores revelaram campos de disputas, manifestam a diversidade e as ambiguidades das lembranças e esquecimentos. Deste modo, percebemos que as lembranças dos narradores são reelaboradas e passam por reapropriações culturais nos processos de deslocamentos continental e transfronteiriços no cenário latino americano. / This dissertation examines the question of Latin American emigration movements through life history interviews from a single family of Bolivian residents living in São Paulo and its affective social network. In addition, thematic oral history interviews with Bolivian intellectuals are analyzed. As a result of its use of two kinds of oral history interviewing methodologies, this dissertation contributes to contemporary migration studies. The central themes of this research are the negotiation of identities between the first and second generations of the family chosen for this study, and the mediation of the identities of Bolivian immigrants within Brazilian society. The identities and life trajectories of the narrators are perceived as heterogeneous, in process, in transit, and articulated by zones of contact and cultural exchanges. Recorded narrations reveal fields of conflict, and show diversity, ambiguity, and silences. Thus, we find that narrators memories are re-elaborated and go through a process of cultural appropriation as they cross borders and are dislocated within the Latin American continent.
475

A ideologia das classes subalternas através das festas / A ideologia das classes subalternas através das festas

Amarildo Ribeiro Dias 27 April 2009 (has links)
Neste trabalho, o objetivo central é contribuir para a formulação de um aporte teórico, concernente às Ciências Sociais, na área das relações entre Comunicação e Cultura sobre o conteúdo político-ideológico implícito nas manifestações culturais das classes subalternas e examiná-lo enquanto instrumento ampliador da margem de compreensão sobre as formas de produção e auto-reprodução destas classes. Através da metodologia dialética, estudamos as possibilidades de identificar, na esfera das manifestações populares subalternas, indicativos da presença de potenciais ideológicos mediante os níveis verificados de sublevação do homem perante processos de homogeneização do pensamento, em contradição às condutas de resistência, automovimento e auto-governo reais. Constatamos, nestes estudos, que as metodologia e filosofia historicistas atualmente estão predispostas às necessidades de transformação da sociedade. Identificamos sua base ideológica nas subjetividades de dispositivos sócio-culturais que da realidade das classes subalternas deverá vir à superfície através da práxis filosófica que conceba o nexo mundo-cultura-movimento. / The primary aim of this work is to help developing a theoretical contribution, concerning Social Sciences, to the area dealing with Communication and Culture. Essentially, it discusses the political-ideological content underlying cultural expressions of the subordinate classes, which is identified as an expanding instrument of the understanding limits concerning the means of production and self-reproduction of these classes. Through a dialectical methodology, we have studied the possibilities of identifying, in the scope of popular subordinate expressions, symptoms of the presence of ideological potential by evaluating the level of human rebellion when faced by procedures of homogenizing thought, as opposed to resistance behaviour, real self-movement and selfgovernment. We have established, in this important occasion, the predisposition of historicist methodology and philosophy to the needs of changing society. Furthermore, we have identified its ideological basis in the subjectivities of social and cultural devices which, from the reality lived by subordinate classes, will only come forward through a philosophical praxis that will conceive the nexus of world-culture-movement.
476

Exame clínico e eletrovibratografia na detecção de deslocamento de disco articular: estudo comparativo / Eletrovibratografia and clinical examination to detect displacement of articular disc: a comparative study

Andre Felipe Abrão 20 March 2009 (has links)
A avaliação completa do sistema estomatognático é essencial para o diagnóstico e plano de tratamento ortodôntico. Não se devem apenas avaliar aspectos estáticos da oclusão, mas também os funcionais, pois estes últimos podem mostrar-se alterados e envolver um ou mais componentes do sistema estomatognático, entre eles, a articulação temporomandibular (ATM). Uma das alterações encontradas com freqüência é o deslocamento de disco articular, o que pode interferir no prognóstico e, eventualmente, comprometer o resultado do tratamento ortodôntico. Na tentativa de contribuir para o reconhecimento dessas alterações, este estudo teve como finalidade avaliar a concordância entre dois examinadores calibrados em relação ao diagnóstico de deslocamento de disco articular, comparar a percepção dos pacientes aos ruídos com os dados do exame clínico e eletrovibratografia, além de checar a possível equivalência entre o exame clínico e eletrovibratografia, como métodos de detecção do deslocamento de disco articular. A amostra foi composta por 60 voluntários, divididos igualmente em 4 grupos com 15 participantes cada, definidos por meio do exame clínico e agrupados segundo o gênero e a presença ou ausência de estalo. O exame clínico foi realizado por dois examinadores treinados. A eletrovibratografia foi realizada por um único operador treinado, e empregou-se o programa SonoPAK (Bioresearch Inc.). Para análise dos resultados de concordância entre ambas as técnicas e entre os examinadores, foi utilizado o coeficiente kappa. Os resultados mostraram excelente concordância inter examinadores na realização do exame clínico, concordância satisfatória entre os relatos de ruídos referidos pelos pacientes quando comparados ao exame clínico e eletrovibratografia e concordância também satisfatória entre os dois métodos estudados. / The complete evaluation of the stomatognathic system is essential to the diagnostic and orthodontic treatment plan. It should not evaluate only the occlusal static aspects, but the functional aspects, because the latter could be altered and one or more components of the stomatognathic system could be involved, including the Temporomandibular Joint (TMJ). One of the frequently found alterations founded frequently is the articular disc displacement, which could affect in the prognostic, and, eventually the result of the orthodontic treatment. Trying to contribute to recognize these alterations, the purpose of this study was to evaluate the findings of two calibrated examiners on disk displacement diagnosis, to compare the patients joint sounds perception to the to the results found by the clinical examination and electrovibratography, and beyond that check the possible matching between the clinical examination and the electrovibratography as methods of disc displacement detection. The sample was composed of 60 patients, divided equally into 4 groups of 15 participants each, defined by clinical examination and grouped according to gender and to the presence or absence of the sound (click). The clinical examination was made by two trained examiners. The electrovibratography was made by only one only operator and the SonoPAK software was used (Bioresearch Inc.). The kappas coefficient was used to analyze of the results. They showed that the examiners findings were very close in the clinical examination, partially close on the joint sounds report told by the patients when compared to the clinical examination and eletrovibratography and reasonable equivalence between the two methods studied.
477

\"Deslocamentos condilares entre RC e MIH em indivíduos sintomáticos e assintomáticos e suas correlações com as disfunções temporomandibulares\" / Condylar displacement between CR and MIC in symptomatic and asymptomatic subjects and their correlations with the temporomandibular dysfunctions.

Soo Young Kim Weffort 02 March 2007 (has links)
Os tratamentos da oclusão levaram à escolha da relação cêntrica (RC) como posição de referência devido à sua reprodutibilidade, o que favorece maior precisão do diagnóstico. As interferências oclusais e os conseqüentes deslocamentos condilares entre as posições mandibulares de RC e a máxima intercuspidação habitual (MIH) têm sido revelados como parte dos fatores etiológicos das disfunções temporomandibulares. Na tentativa de melhor esclarecer o papel dos deslocamentos condilares dentro do contexto da oclusão, morfológica e funcional, como fator de risco no desenvolvimento da DTM, este estudo transversal prospectivo propôs-se a avaliar os referidos deslocamentos. A amostra foi composta por 70 participantes, não desprogramados, divididos em grupo sintomático, segundo o critério RDC/TMD, e grupo assintomático. Para avaliação dos participantes, empregaram-se modelos de gesso montados em articulador Panadent. Foram obtidos registros de cera em MIH e RC, sendo este último obediente à técnica power centric (Roth). As diferenças entre as duas posições foram medidas nos três planos do espaço, em gráficos correspondentes aos lados direito, esquerdo e transversal, avaliadas quanto à magnitude e direção e comparadas quanto à sintomatologia e o gênero pela análise de variância. A possível correlação quanto à direção do deslocamento foi avaliada pelo teste qui-quadrado de homogeneidade. Para verificar a reprodutibilidade das medidas intra e interobservador foram calculadas correlações intraclasses e índice de Dahlberg. Os resultados mostraram repetibilidade e reprodutibilidade das medidas condilares. Nos indivíduos com DTM, os deslocamentos em valores médios absolutos no plano vertical foram de 1,48 mm do lado direito (IPC vert D) e de 1,72mm do lado esquerdo (IPC vert E). No plano horizontal foram de 0,63 mm do lado direito (IPC hor D) e de 0,64 mm do lado esquerdo (IPC hor E). No plano transversal (IPC trans) o valor médio do deslocamento foi de 0,41 mm. Os valores médios absolutos dos deslocamentos condilares em indivíduos assintomáticos foram de 1,22 mm no plano vertical do lado direito (IPC vert D) e 1,30 mm do lado esquerdo (IPC vert E). No plano horizontal do lado direito (IPC hor D), os valores médios foram de 0,63 mm e do lado esquerdo (IPC hor E) 0,63 mm. No plano transversal, o valor médio do deslocamento foi de 0,23 mm (IPC trans). Na comparação entre os grupos assintomático e sintomático, constatou-se que este último apresentou valores maiores quanto ao deslocamento vertical do lado esquerdo (E) (p=0,039) e no sentido transversal (p=0,015). Observou-se também nesse grupo maior prevalência de deslocamento no sentido distal quando comparado ao grupo assintomático. Na associação entre a sintomatologia e a direção de deslocamento, verificou-se que o deslocamento condilar horizontal direito apresentou associação estatística com a sintomatologia (p=0,015). Não foram encontradas diferenças relativas à sintomatologia quanto ao gênero. O primeiro ponto de contato em RC mostrou-se localizado em sua grande maioria no segundo molar permanente, tanto no grupo sintomático (94,2%) quanto no assintomático (91,4%). / Centric relation (CR) is considered a reference position in the treatment of occlusion due to its reproducibility, thus favoring accuracy of diagnosis. Occlusal interference and consequent condylar displacement between CR and CO (centric occlusionmaxim intercuspation) have been revealed as part of the etiologic factors of temporomandibular dysfunction. In an attempt to better understand the role of condylar displacement in the context of morphologic and functional occlusion as a risk factor in TMD development, this transverse prospective study intends to evaluate the referred displacement. The sample was composed of 70 participants, not deprogrammed, divided into a symptomatic group, according to RDC/TMD criteria, and another, asymptomatic. From each subject, a wax registration in CO and CR was taken, the latter obeying the power centric technique (Roth). Cast models were mounted on a Panadent. articulator. Condylar displacement between CO and CR on three-spatial planes was measured on graphs corresponding to right, left and transverse sides, and appraised for magnitude and direction, determined by condilar position indicator instrumentation (Panadent-CPI). Analysis of variance test was used for symptom and gender comparison. The possible correlation for displacement direction and TMD was evaluated by the qui-square test of homogeneity. Inter and intraoperator reproducibility measurement error and reliability were calculated by intra-class correlations and the Dahlberg index. Low error showed high reliability and reproducibility. In TMD individuals, absolute mean values of condylar displacements in the vertical plane were 1, 48 mm on the right side (CPI vert R) and 1,72mm on the left side (CPI vert L). In the horizontal plane were 0,63mm on the right side (CPI hor R), and 0,64mm on the left (CPI hor L). In the traverse plane (IPC trans), mean value of displacement was 0,41mm. The absolute mean value of condylar displacement in asymptomatic individuals was 1,22 mm in the vertical plane on the right side (CPI vert R), and 1,30mm on the left side (CPI vert L). In the horizontal plane on the right side (CPI hor R) were 0,63mm and on the left side (CPI hor L), 0,63mm. In the tranverse plane (CPI trans) the mean value was of 0,23mm. Comparing asymptomatic and symptomatic groups it was verified that the latter presented larger values in vertical displacement on the left side (p=0,039) and in the transverse plane (p=0,015). In this group, larger displacement prevalence was also observed in distal direction when compared to the asymptomatic group. In the association between symptoms and displacement direction, it was verified that horizontal condilar displacement of the right side presented statistical association (p = 0,015). It was noted that, three-dimensional condylar displacement was found in both symptomatic and asymptomatic individuals. No correlation was found between patient gender and the presence of TMD symptoms. The initial premature contact in CR was detected, in most of the cases, on the second permanent molar, in both symptomatic (94,2%) and asymptomatic (91,4%) group.
478

De l'intime au politique à l'identité à travers l'art vidéo en France, en Turquie et au Brésil / From intimate to political : identity through the video art in France, Turkey and Brazil

Tezkan, Ayse Melis 09 June 2012 (has links)
Cette thèse traite de la définition et des prolongements politiques de l’identité, questionnés à travers la manifestation de l’intime dans l’art vidéo des années 1970 à nos jours. L’intime est pensé aussi bien en tant qu’effacement des frontières entre le privé et le public qu’en tant que nature de la relation entre la vidéo et ses spectateurs. Le champ de recherche est géographiquement limité à la France, au Brésil et à la Turquie, de par la particularité de leurs rapports respectifs à l’identité culturelle et nationale : la jeune identité turque née des cendres de l’empire ottoman, entre Occident et Orient ; l’identité brésilienne, fondée sur l’hybridité ; l’identité française à l’épreuve de l’immigration. La première partie, structurée par une approche géographique et chronologique,expose les grands traits de l’histoire de l’art vidéo sur ces trois territoires et certains événements sociaux et/ou politiques marquant les choix esthétiques : les coups d’Etat au Brésil et en Turquie, l’avènement de la modernité turque, le mouvement anthropophagique brésilien, le reflet du mouvement féministe dans l’art français. Les thèmes majeurs qui y sont évoqués, comme le nomadisme, la relation entre le centre et la périphérie, le cinéma comme lieu d’invention des identités, dirigent les deux parties suivantes qui s’articulent autour des déplacements psychiques, géographiques et disciplinaires. Par le biais de l’analyse d’oeuvres vidéographiques de douze artistes - Nil Yalter, Regina Vater, Dias & Riedweg, Kutluğ Ataman, Fikret Atay, Şener Özmen,Thierry Kuntzel, Rebecca Digne, Brice Dellsperger, Wagner Morales, Pierrick Sorin etRafael França – on construit une réflexion sur la détermination de l’identité et la nature politique de l’intime. / This thesis discusses the definition and the political extensions of identity, whichit questions through the expression of the intimate in video art from the 70s till today.The intimate is considered not only as the fading of borders between the private and the public but also as the nature of the relationship between the video and its viewers.The field of this research is geographically limited to France, Brazil and Turkey,because of the particular relation of each of these countries to the notion of cultural and national identity: the young Turkish identity, born from the ashes of the Ottoman Empire, standing between the West and the East; the Brazilian identity, established upon hybridity; the French identity, put to the test of immigration.The first part, which is structured by a geographical and chronological approach,exposes the important traits of video art’s history on these three territories as well assome social and/or political events which have left marks on the aesthetical preferences:the Coups d'état in Brazil and Turkey, the advent of Turkish modernity, the cannibalistic Brazilian movement, the reflections of the feminist movement in Frenchart. The major themes mentioned in the first part, like nomadism, the center-peripheryrelations and the cinema as a space to invent identities, guide the following two partsbased on psychic, geographical and disciplinary displacements. Through the analysis ofthe videographical pieces of twelve artists - Nil Yalter, Regina Vater, Dias & Riedweg,Kutlug Ataman, Fikret Atay, Sener Özmen, Thierry Kuntzel, Rebecca Digne, BriceDellsperger, Wagner Morales, Pierrick Sorin and Rafael França – a thinking on the determination of the identity and the political nature of the intimate is built.
479

An assessment of the fracture toughness of two cast and wrought stainless steels

Stock, C. R. January 1971 (has links)
The crack-tip displacement concept has been applied to austenitic steels at 25°C and in the temperature range 400-800°C. The measurement of a maximum load crack-tip displacement in a notch bend test, provided a good indication of fracture-toughness since it included a portion of slot: crack-growth. The ability of these alloys to tolerate slow crack-growth, and even to arrest cracks without becoming unstable, is of considerable engineering importance since many service failures originate at stress concentrations produced by welding of poor design. Slow crack-growth was intermittent and highly dependent upon microstructural irregularities in the immediate vicinity of the crack-tip. The stress concentration at the crack-tip could be relieved (and the fracture-toughness improved) by localized plastic deformation. The degree of stress relief depended upon the locality and proximity of the various microstructural features as determined by the alloy manufacturing process. The temperature sensitivity of the bond strengths of the various interfaces particularly in cast alloys, had a marked-effect on fracture-toughness. This may have been the result of segregation of trace elements e.g. lead to the interface. Above the equicohesive temperature, the greatest contribution to fracture-toughness was associated with the presence of large amounts of second phase particles in the boundaries. In many cases, and particularly cast alloys, more than one crack formed at the notch root. Only one of these cracks propagated to failure. Heterogeneous cracking of this kind (itself an indication of fracture-toughness), lead to difficulties in correlating an initiation C. O. D. with the macroscopic plastic properties of the material. Similar correlations were however possible with the maximum load crack opening displacement.
480

Real-Time Tessellation A Region of Interest Based Technique Suited for Game Applications / Realtids tesselering, en regionsbaserad teknik för spel

Liljekvist, Pontus Holmertz, Zsigmond, Andreas January 2013 (has links)
While the games industry grows, the need for visually appealing graphics increase. This drives the demand for new hardware and the development of new techniques forward. With the latest generation of 3D graphic APIs the new rendering pipeline technique tessellation was announced. With each generation of games getting more advanced, the demand for highly detailed models increase. This leads to a higher workload for the GPU. The purpose of this thesis is to research the fi eld of tessellation and develop a prototype to optimize the tessellation pipeline. The prototype is designed to help reduce the number of generated triangles by dividing the mesh into regions, each region with its own tessellation factor. The prototype implementation supports both manual and automatic generation of these regions. A new fi le format was developed to support the region data. The implementation was split into three parts; one Python based Maya plug-in used for preparing the model for exporting, one exporter for Maya that generated the output fi le, and one viewer application capable of rendering the resulting mesh. The geometry output of the proposed technique was evaluated by comparing it to uniformly tessellated reference mesh geometry. Measurements show that the proposed technique is capable of reducing the face count with minor or maintained correlation to the reference geometry. / Medans spelindustrin växer ökar behovet av visuellt tilltalande grafik. Detta driver utvecklingen av hårdvara och nya tekniker framåt. Med den senaste generationens 3D grafik API kom renderingssteget tesselering. Eftersom varje generation av spel blir mer avancerat ökar efterfrågan på detaljerade modeller. Detta leder till en högre arbetsbörda för GPUn. Syftet med denna avhandling är att undersöka tesselering och utveckla en prototyp för att optimera tesseleringspipelinen. Prototypen är utformad för att hjälpa till att minska antalet genererade trianglar genom att dela upp figuren i regioner, varje region med egen tesseleringsfaktor. Prototypen stödjer både manuell och automatisk generering av dessa regioner, ett nytt filformat utvecklades för att stödja dessa. Prototypen delades upp i tre delar, ett Python baserat Maya plug-in som används för att förbereda modellen för export, en Maya exportör som genererar filerna, och ett visningsprogram som kan rendera den färdiga figuren. Figuren från den föreslagna tekniken utvärderades genom att jämföra den med motsvarande figur med universal tesseleringsfaktor. Mätningar visar att den föreslagna tekniken klarar att reducera antalet trianglar med låg felmarginal.

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