Cette étude porte sur le comportement à l’impact et post-impact d’un composite 100% biosourcé, à fibres de lin et à matrice Polyamide 11. Une première étape a consisté à optimiser les paramètres de mise en oeuvre par thermocompression de ce composite. Deux types de tissus unidirectionnels de lin (A et B) ont été testés, ainsi que deux conditionnements de la résine PA11 : sous forme de film ou de poudre. Tout d’abord, les niveaux de température et de pression ont été optimisés sur un « premier set » de composites, élaborés à partir de lin A et de poudre de Polyamide 11. Ensuite, un « deuxième set » de composites a été étudié pour optimiser le choix des constituants. L’ensemble des composites fabriqués a été testé en traction, par DMA et par des mesures de taux de porosité. Il a été montré que la configuration optimale était obtenue avec le lin B et le Polyamide 11 sous forme de film, élaborée avec une température de 210°C et des paliers de pression de 25, 40 et 65 bars. Une analyse des endommagements créés en traction dans ce composite a été réalisée en couplant des observations par MEB et des enregistrements par émission acoustique. Il a ainsi été possible d’identifier quatre classes d’endommagement dans les composites [0]4 et [90]4, et cinq classes dans les composites [±45]s. Chacune de ces classes a été associée à une forme d'onde acoustique et à un type d’endommagement observé. La deuxième partie de ce travail a consisté à étudier l’influence d’un impact de 3,6J sur le comportement en traction et en compression de quatre séquences d’empilement : unidirectionnel [0]8, alterné [0/90]2s, sandwich [02/902]s et multidirectionnel [45/0/-45/90]s. Les grandeurs caractéristiques du comportement à l’impact ont tout d’abord été déterminées pour les quatre drapages.Les endommagements créés par l’impact ont été analysés par différentes techniques : observations visuelles,mesures topographiques, C-scan par ultrasons, et micro-tomographie. Les résultats ont montré que les configurations qui s’endommagent le moins à l’impact sont les drapages alterné et multidirectionnel. Les échantillons impactés ont ensuite été sollicités pour déterminer leurs propriétés post-impact, et les comparer aux résultats obtenus sur éprouvettes saines. Des essais de traction et de compression ont été réalisés sur cinq éprouvettes de chaque configuration. Lors de ces essais, les endommagements ont été suivis par émission acoustique, et les champs de déformation ont été mesurés par corrélation d’images. Les résultats ont montré que,grâce à la présence des plis à ±45°, le composite multidirectionnel présente les meilleures propriétés résiduelles.Enfin, un modèle post-impact a été mis en place, permettant, dans une première approche, en appliquant un module dégradé dans la zone impactée, de retrouver globalement les champs de déformations expérimentaux mesurés sur les différents drapages. / This PhD work deals with the impact and post-impact behavior of a fully bio-based composite made of flax fibresand Polyamide 11. The first goal was to optimize the hot press moulding parameters for manufacturing this composite. Two types of unidirectional flax fabrics (A and B) and two forms of Polyamide 11 (powder or film) were tested. At first, the pressure and temperature process values were optimized using a first set of composites made of flax A and Polyamide 11 in the form of powder. Then, an optimization of material components was conducted using a second set of composites. All the manufactured composites were tested by means of tensile tests, DMA and porosity measurements. Finally, an optimum configuration was determined: the composite flax B/PA 11 film manufactured with a temperature value of 210 °C and with gradual levels of pressure until 65 bars. Moreover, damage mechanisms were evaluated by acoustic emission and SEM observations during tensile tests. Four mechanisms were identified for the [0]4 and [90]4 composites and five for [±45]s composites. The second goal of this study was to study the effect of an impact of 3.6 J on the compression and tensile behaviors of four stacking sequences of this composite: unidirectional [0]8, alternated [0/90]2s, sandwich [02/902]s and multidirectional [45/0/- 45/90]s. The damage created by the impact in these four lay-ups was characterized thanks to different techniques: visual observations, topographic and C-scan measurements, and micro-tomography. It has been shown that the configurations with the smallest damage were the alternated and multidirectional composites. Then, impacted composites were tested by tensile and compressive loadings, and results were compared with the properties of non- impacted composites. Acoustic emission and digital image correlation were used to identify the damage and strain mechanisms of each type of composites. The results showed that, thanks to the presence of the ±45° plies, the multidirectional composite has the best post-impact behavior. Finally, a finite element model has been developed for simulating the post-impact behavior. As a first approach, a lower value of modulus has been implemented in the impacted area. It has allowed us to compare numerical and experimental strain fields for the different stacking sequences.

Orientadores: Job Jesus Batista, Bernardino Figueiredo / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociencias / Made available in DSpace on 2018-07-18T17:40:26Z (GMT). No. of bitstreams: 1 Sachs_LilianeLavouraBueno_M.pdf: 17699176 bytes, checksum: fa1333599bb62707cb905b7b086fddc9 (MD5) Previous issue date: 1993 / Resumo: O depósito mineral poli metálico do Igarapé Bahia (Cu-Au-Ag-Mo) é hospedado por rochas metavulcânicas e metassedimentares de baixo grau do Grupo Igarapé Bahia na Província Mineral de Carajás, norte do Brasil. O Grupo Igarapé Bahia constitui-se principalmente de rochas vulcânicas básicas e piroclásticas, rochas sedimentares psamopelíticas e formações ferríferas, que exibem direção NNW e mergulhos de 70° ENE. Estas rochas são capeadas por um manto laterítico, o qual hospeda um considerável depósito de ouro na área. O presente trabalho exibe os resultados petrográficos e litogeoquímicos realizados nas rochas vulcânicas básicas do depósito do Igarapé Bahia, assim como os resultados petrográficos da mineralização primária sulfetada associada a estas rochas. Um total de 23 amostras de rochas tiveram seus elementos maiores e traços analisados por Fluorescência de Raio-X, Absorção Atômica e outros métodos analíticos, realizados na UNICAMP e na UNESP. Os teores de ETR foram determinados em 8 amostras de rochas pelo método ICP, na GEOSOL. Estas rochas foram também estudadas microscopicamente e a paragênese do minério foi determinada num total de 25 seções polidas. Os tipos litológicos são: metabasaltos,metadiabásios com intercrescimento granofírico, meta-andesitos a metadacitos, rochas ricas em magnetita, as quais hospedam lentes de sulfeto maciço, e rochas básicas intrusivas que cortam a sequência vulcanosedimentar. No geral, as rochas vulcânicas do Igarapé Bahia foram alteradas hidrotermalmente em condições compatíveis a da facies xisto verde.Todos os tipos litológicos, exceto as rochas básicas intrusivas contêm quantidades variáveis de clorita, carbonato, quartzo e epidoto. Os teores de elementos incompatíveis e ETR obtidos para estas rochas indicam que elas correspondem provavelmente a Tholeiítos Continentais, com relativo enriquecimento em Rb, Ba, K, La e Ce. Este enriquecimento pode ser devido à alteração hidrotermal ou à contaminação crustal. A mineralização primária sulfetada do depósito do Igarapé Bahia sofreu remobilização durante o evento hidrotermal, em condições da faices xisto verde e foi também afetada por evento cisalhante / Abstract: The polymetallic Igarapé Bahia mineral deposit (Cu-Au-Ag-Mo) is hosted by the low-grade metavolcanic and metasedimentary roeles of the Igarapé Bahia Group in the Carajás Mineral Province, northern Brazil. The Igarapé Bahia Group consists mainly of basic volcanic and pyroclastic rocks, psamo-pelitic sedimentary rocks and iron formation, which follow a general NNW strike with a dip of 7(1 ENE. These rocks are overlain by a lateritic sequence which hosts the largest gold deposit in the area. The present study reports a petrographic and lithogeochemica1 investigation on the basic volcanic rocks of the Igarapé Bahia deposit, as well as petrographic results on the primary sulfide mineralization associated with these rocks. A total of 23 rock samples were analyzed for both major and trace elements by XRF, ASS and other analytical methods available at UNICAMP and UNESP. REE contents were determined on 8 selected rock samples by ICP method at GEOSOL. These rocks were also studied by conventional optical microscopy and the ore paragenesis were recognized in a total of 25 polished-thin section. Lithologica1 types are: metabasalts, metabasalts with granophyric intergrowths, meta-andesites to metadacites, country rocks with interlayerings of magnetiterich rocks, which host massive sulfide lenses, and intrusive basic rocks crosscutting the volcanic-sedimentary sequence. In general, the Igarapé Bahia volcanic rocks have been hydrotermally altered at greenschist facies conditions. All types, except the subvolcanic basic rocks contain variable amounts of chlorite, carbonate, quartz and epidote. The incompatible element and REE patterns obtained for these rocks resemble those of Continental Tholeiites probably, with relative enrichment for Rb, Ba, k, La and Ce. These enrichment may be due to the hydrothermal alteration or crostal contamination. The primary sulfide mineralization of the Igarapé Bahia deposit underwent local remobilization during hydrothermal alteration events at greenschist facies and was also affected by shearing within a more brittle regime / Mestrado / Mestre em Geociências

by Yue Kwok-bun. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1980. / Includes bibliographical references (leaf 149).

Submitted by JACIARA CRISTINA ALMEIDA DO AMARAL (jaciaramaral@ufpa.br) on 2018-07-19T17:54:20Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação com normatização II para UFAM.pdf: 654611 bytes, checksum: bdbb4aa732d7e6ad8f9645d253b4ad31 (MD5) / Approved for entry into archive by JACIARA CRISTINA ALMEIDA DO AMARAL (jaciaramaral@ufpa.br) on 2018-07-19T17:54:40Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação com normatização II para UFAM.pdf: 654611 bytes, checksum: bdbb4aa732d7e6ad8f9645d253b4ad31 (MD5) / Made available in DSpace on 2018-07-19T17:54:40Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação com normatização II para UFAM.pdf: 654611 bytes, checksum: bdbb4aa732d7e6ad8f9645d253b4ad31 (MD5) Previous issue date: 2015-01-15 / O câncer de pulmão continua sendo a principal causa de mortalidade no Brasil e no Mundo, devendo-se ao fato dos casos serem diagnosticados em estágios avançados, resultando muitas vezes em tratamento paliativo. A pesquisa analisou o perfil clínico-epidemiológico dos pacientes portadores de câncer de pulmão atendidos no Hospital Universitário João de Barros Barreto, descrevendo seus fatores de riscos. Trata-se de um estudo exploratório descritivo, retrospectivo, com abordagem quantitativa realizada no período de 2010 à 2013. Foi realizada análise estatística descritiva com distribuição de frequências, tabelas e testes estatísticos não paramétricos. As variáveis analisadas foram dados sociodemográficos e clínicos dos pacientes. A coleta de dados foi realizada no Departamento de Arquivo Médico e Estatístico do hospital em 160 prontuários de pacientes maiores de 18 anos, de ambos sexos, portadores de Câncer de Pulmão. Os resultados apontaram predominância do sexo masculino com 60,6% (97) na faixa etária de 61 a 70 anos (73,7%); 39,4% (63) do sexo feminino na faixa etária de 51 a 60 anos (37,5%), com relação a escolaridade 59,4% (95) possuíam ensino fundamental incompleto em ambos os sexos. Eram tabagistas 84,4%. Evidencia-se a necessidade de investimentos e estratégias na detecção precoce do câncer de pulmão bem como na adoção de medidas educativas sensibilizando a população no estímulo à cessação ao tabagismo, tornando-se evidente a importância da enfermagem diante dessas ações a fim de contribuir com a diminuição das taxas de mortalidade por câncer de pulmão. / Lung cancer remains the leading cause of mortality in Brazil and in the world, must to the fact of the cases are diagnosed in advanced stages, often resulting in palliative treatment. The research analyzed the clinical and epidemiological profile of patients with lung cancer patients treated at the University Hospital João de Barros Barreto, describing their risk factors. This is a descriptive, retrospective exploratory study with a quantitative approach carried out from 2010 to 2013. It was carried out a descriptive statistical analysis with frequency distribution, tables and non-parametric statistical tests. The variables analyzed included the demographic and clinical data of patients. Data collection was performed at the Department of Statistics and Medical File hospital records of 160 patients older than 18 years, of both sexes, people with lung cancer. The results showed a predominance of males with 97 (60.6%) aged 61-70 years (73.7%); 63 (39.4%) were females aged 51-60 years (37.5%), with respect to education 95 (59.4%) possessed incomplete primary education for both sexes. Were smokers 84.4%. Highlights the need for investments and strategies for early detection of lung cancer as well as the adoption of educational sensitizing the population in encouraging smoking cessation, thus demonstrating the importance of nursing on these actions in order to contribute to the reduction in mortality rates from lung cancer.

Typescript (photocopy). / Digitized by Kansas Correctional Industries

This thesis is entitled ‘Classical Elements in Early Christian Depictions of the Afterlife’. Taking an approach influenced by Reception studies, it explores some key moments where Christians engage in a dialogue with their pagan predecessors. The focus is primarily on Latin literature, although a limited selection of art and Greek literature has been included where particularly revealing. The aim of this work is to use a series of case studies in order to demonstrate the cross-pollination of ideas and to show that in late antiquity, Christian authors in the Latin West were reacting to their pagan antecedents in a variety of different ways. Through close readings of several key texts this thesis will examine moments of cultural interchange and allow us to think about some specific and illuminating examples of a complex and nuanced relationship. In the first few centuries AD Christian ideas about what happens when we die were still fluid, so the afterlife provides a particularly fruitful basis for exploring wider questions about the relationship between paganism and Christianity.

Detta arbete syftar till att skapa en bättre förståelse till orsakerna bakom PA-teknikers val av ljudnivå på en konsert, och varför dessa ljudnivåer är så pass höga som de är idag. Ett antal ljudtekniker har i rollen som PA-tekniker fått besvara några frågor om ljudnivån på konserter. Dessutom har ett flertal konsertbesökare fått svara på bl.a. om de tycker att ljudnivån på konserter brukar vara lagom eller för hög. De flesta ljudteknikerna och nästan två tredjedelar av konsertbesökarna tyckte att ljudnivån brukar vara för hög. Musikens genre och scenljudet uppgavs som de faktorer som påverkar valet av ljudnivån mest. Men ytterligare en faktor somgör att ljudnivån ofta är hög, är att ljudnivån påverkar musikupplevelsen. På en konsert vill de flesta kunna känna musiken fysiskt.

Thesis (M.S.)--Pennsylvania State University, 2009. / Mode of access: World Wide Web. Thesis advisor: Erica A.H. Smithwick.

Thesis (M.A.)--Kutztown State College, 1976. / Source: Masters Abstracts International, Volume: 45-06, page: 2922. Title on spine and title of the abstract varies. Typescript. Abstract precedes thesis as [3] preliminary leaves. Includes bibliographical references (leaf [55]).

Thesis (Ph. D.)--Pennsylvania State University, 1999. / Diskette not included. --UMI note. Includes bibliographical references (leaves 88-92).