Thesis (M.A.)--University of Toronto, 2005. / Includes bibliographical references (leaves 129-138).

A mina de carbonatito de Cajati contém mineralização de apatita, utilizada na fabricação de ácido fosfórico, que é aplicado a matéria-prima carbonática para obtenção de foscálcio, suplemento mineral em rações animais. Dentre as unidades litológicas em lavra destacam-se as Zonas de Xenólitos, formadas pela interação da rocha encaixante com o magma carbonatítico. São constituídas de fragmentos do jacupiranguito de dimensões métricas distribuídos de forma aparentemente errática na massa carbonatítica e zonas de reação centimétricas, compostas por minerais carbonáticos e silicáticos neoformados. Essas regiões apresentam apatita e constituem significativa parcela dos recursos minerais da jazida, porém devido à abundância de minerais silicáticos, essencialmente flogopita, diopsídio, forsterita e tremolita, seus teores de MgO e SiO2 são elevados e lhe conferem características distintas das unidades carbonatíticas, interferindo no processo de beneficiamento. Visando fornecer subsídios para o desenvolvimento de processos que otimizem o aproveitamento das Zonas de Xenólitos como minério de fosfato foram realizados ensaios de separação em escala de caracterização utilizando o Frantz de Barreiras (modelo LB-1). O procedimento objetivou o conhecimento do comportamento magnético dos silicatos em oposição ao da apatita e dos carbonatos; para o que foram coletadas amostras volumétricas em diferentes pontos da mina. Os silicatos, todos portadores de MgO, mostraram variações de cores e de composição química além de distribuição peculiar em cada litotipo componente das Zonas de Xenólitos. Diopsídio ocorreu principalmente no litotipo jacupiranguito, enquanto flogopita, forsterita e tremolita foram mais abundantes na zona de reação. Esses minerais ocorreram em intervalos de campo magnético bem definidos, concentrando-se principalmente entre 0,25 e 0,75 A (equivalentes a 2.800 e 8.800 Gauss, respectivamente), e distintos da fluorapatita e dos carbonatos, minerais predominantemente diamagnéticos. Para campo magnético da ordem de 13.800 Gauss obteve-se um produto com 95,2% do P2O5 total contido no intervalo granulométrico adotado para o ensaio e apenas 1,0% de SiO2 associado. Aplicando-se um campo magnético de menor intensidade (aproximadametne 5.700 Gauss) o conteúdo de P2O5 aumenta (97,4%) assim como o de SiO2 (11,1%). Assim mostrou-se viável a utilização de separação magnética como método complementar no beneficiamento de fluorapatita proveniente das Zonas de Xenólitos, desde que o campo magnético aplicado tenha um gradiente de campo adequado para melhor seletividade entre o mineral de minério e os silicatos. Os trabalhos de caracterização desenvolvidos também mostraram uma outra possibilidade de aproveitamento da unidade litológica, a partir da classificação granulométrica após a britagem secundária. Nessa etapa observou-se tendência à segregação dos litotipos, com geração de um material fino (abaixo de 12,7 mm) enriquecido em P2O5 (2,48 a 4,08%) que contém de 26,4 a 59,8% do P2O5 total da amostra. / The Cajati carbonatite mine produces apatite used for phosphoric acid manufacturing. This material is added to carbonatic raw material in order to obtain phoscalcium (foscálcio), used as mineral supply for animal feeding. Among the exploited lithological units there are the Xenolithic Zones, which are generated by assimilation process between the host rock and the carbonatitic magma. They are constituted by jacupiranguite blocks (metric sizes) of random distribution within the carbonatitic matrix and by the reaction zones (centimetric thickness), composed by neoformed carbonatic and silicate minerals. These regions show apatite mineralization and represent a significant part of the mineral resources of the deposit. However their abundance of silicate minerals, essentialy phlogopite, diopside, forsterite and tremolita, leads to high MgO e SiO2 contents, which implies in distinct characteristics from carbonatites, interfering on the concentration plant process. Intending to support the development of new processes seeking the utilization of the Xenolithic Zones as phosphate ore, a laboratory study of mineral separation was taken at the Barrier Frantz Magnetic Separator (model LB-1). Such procedure aims the characterization of magnetic behavior of silicates versus apatite and carbonates, using bulk samples collected in different parts of the mine. Silicates, all Mg-bearing, showed color and chemical composition variations with non-systematic distribution within each lithotipe comprising the Xenolithic Zones. Diopside occurred mainly in the jacupiranguite, while phlogopite, forsterite and tremolite were most abundant in the reaction zone. These minerals occurred in well defined magnetic field intervals, specially between 0,25 and 0,75 A (equivalent to 2.800 and 8.800 Gauss, respectively), and distinct from fluorapatite and carbonates, which are mainly diamagnetics. For magnetic field around 13.800 Gauss a product with 95,2% of total P2O5 content was obtained in the granulometric interval used for the separation procedures with 1,0% of SiO2 associated. Using a lower intensity magnetic field (around 5.700 Gauss) the P2O5 content rises (97,4%) as well as the SiO2 (11,1%). Thus the use of complementary magnetic separation procedures was proved to be a practicable method for beneficiation of fluorapatite from the Xenolithic Zones by applying a magnetic field with adequate field gradient for the selectivity of ore mineral and silicates. Another possibility for utilization of the lithological unit showed by the characterization studies was the grain-size classification after secondary crushing. In this stage a lithotipe segregation was observed and generation of fine material (below 12,7 mm) P2O5 enriched (2,48 to 4,08%), with 26,4 to 59,8% of total P2O5 content in the sample.

A mina de carbonatito de Cajati contém mineralização de apatita, utilizada na fabricação de ácido fosfórico, que é aplicado a matéria-prima carbonática para obtenção de foscálcio, suplemento mineral em rações animais. Dentre as unidades litológicas em lavra destacam-se as Zonas de Xenólitos, formadas pela interação da rocha encaixante com o magma carbonatítico. São constituídas de fragmentos do jacupiranguito de dimensões métricas distribuídos de forma aparentemente errática na massa carbonatítica e zonas de reação centimétricas, compostas por minerais carbonáticos e silicáticos neoformados. Essas regiões apresentam apatita e constituem significativa parcela dos recursos minerais da jazida, porém devido à abundância de minerais silicáticos, essencialmente flogopita, diopsídio, forsterita e tremolita, seus teores de MgO e SiO2 são elevados e lhe conferem características distintas das unidades carbonatíticas, interferindo no processo de beneficiamento. Visando fornecer subsídios para o desenvolvimento de processos que otimizem o aproveitamento das Zonas de Xenólitos como minério de fosfato foram realizados ensaios de separação em escala de caracterização utilizando o Frantz de Barreiras (modelo LB-1). O procedimento objetivou o conhecimento do comportamento magnético dos silicatos em oposição ao da apatita e dos carbonatos; para o que foram coletadas amostras volumétricas em diferentes pontos da mina. Os silicatos, todos portadores de MgO, mostraram variações de cores e de composição química além de distribuição peculiar em cada litotipo componente das Zonas de Xenólitos. Diopsídio ocorreu principalmente no litotipo jacupiranguito, enquanto flogopita, forsterita e tremolita foram mais abundantes na zona de reação. Esses minerais ocorreram em intervalos de campo magnético bem definidos, concentrando-se principalmente entre 0,25 e 0,75 A (equivalentes a 2.800 e 8.800 Gauss, respectivamente), e distintos da fluorapatita e dos carbonatos, minerais predominantemente diamagnéticos. Para campo magnético da ordem de 13.800 Gauss obteve-se um produto com 95,2% do P2O5 total contido no intervalo granulométrico adotado para o ensaio e apenas 1,0% de SiO2 associado. Aplicando-se um campo magnético de menor intensidade (aproximadametne 5.700 Gauss) o conteúdo de P2O5 aumenta (97,4%) assim como o de SiO2 (11,1%). Assim mostrou-se viável a utilização de separação magnética como método complementar no beneficiamento de fluorapatita proveniente das Zonas de Xenólitos, desde que o campo magnético aplicado tenha um gradiente de campo adequado para melhor seletividade entre o mineral de minério e os silicatos. Os trabalhos de caracterização desenvolvidos também mostraram uma outra possibilidade de aproveitamento da unidade litológica, a partir da classificação granulométrica após a britagem secundária. Nessa etapa observou-se tendência à segregação dos litotipos, com geração de um material fino (abaixo de 12,7 mm) enriquecido em P2O5 (2,48 a 4,08%) que contém de 26,4 a 59,8% do P2O5 total da amostra. / The Cajati carbonatite mine produces apatite used for phosphoric acid manufacturing. This material is added to carbonatic raw material in order to obtain phoscalcium (foscálcio), used as mineral supply for animal feeding. Among the exploited lithological units there are the Xenolithic Zones, which are generated by assimilation process between the host rock and the carbonatitic magma. They are constituted by jacupiranguite blocks (metric sizes) of random distribution within the carbonatitic matrix and by the reaction zones (centimetric thickness), composed by neoformed carbonatic and silicate minerals. These regions show apatite mineralization and represent a significant part of the mineral resources of the deposit. However their abundance of silicate minerals, essentialy phlogopite, diopside, forsterite and tremolita, leads to high MgO e SiO2 contents, which implies in distinct characteristics from carbonatites, interfering on the concentration plant process. Intending to support the development of new processes seeking the utilization of the Xenolithic Zones as phosphate ore, a laboratory study of mineral separation was taken at the Barrier Frantz Magnetic Separator (model LB-1). Such procedure aims the characterization of magnetic behavior of silicates versus apatite and carbonates, using bulk samples collected in different parts of the mine. Silicates, all Mg-bearing, showed color and chemical composition variations with non-systematic distribution within each lithotipe comprising the Xenolithic Zones. Diopside occurred mainly in the jacupiranguite, while phlogopite, forsterite and tremolite were most abundant in the reaction zone. These minerals occurred in well defined magnetic field intervals, specially between 0,25 and 0,75 A (equivalent to 2.800 and 8.800 Gauss, respectively), and distinct from fluorapatite and carbonates, which are mainly diamagnetics. For magnetic field around 13.800 Gauss a product with 95,2% of total P2O5 content was obtained in the granulometric interval used for the separation procedures with 1,0% of SiO2 associated. Using a lower intensity magnetic field (around 5.700 Gauss) the P2O5 content rises (97,4%) as well as the SiO2 (11,1%). Thus the use of complementary magnetic separation procedures was proved to be a practicable method for beneficiation of fluorapatite from the Xenolithic Zones by applying a magnetic field with adequate field gradient for the selectivity of ore mineral and silicates. Another possibility for utilization of the lithological unit showed by the characterization studies was the grain-size classification after secondary crushing. In this stage a lithotipe segregation was observed and generation of fine material (below 12,7 mm) P2O5 enriched (2,48 to 4,08%), with 26,4 to 59,8% of total P2O5 content in the sample.

The 134-year old Frantz-Dunn House in Hoskins. Oregon is an intact, well-preserved example of rural Gothic architecture in the Willamette Valley. The old farmstead sits on a former Civil War Fort site and represents a link in the history of the region to the larger patterns of expansion in America during the nineteenth century. This study focuses on the family history of three generations of occupants of the historic dwelling. The information was gathered from extant materials and official documents, historic publications, local museum collections, visual observation of the house and from interviews with the relatives of the pioneer families and selected Hoskins residents. Special interest was paid to the interior furnishings and finishes in the interest of the material culture of the house. Interior furnishings were discussed from interview and extant elements. Recommendations for further study of this and other historic houses with focus on the interior material culture of are given. / Graduation date: 2006 / Best scan available for photos.

This thesis explores the affect of the emperor-centred visual culture on Sōseki’s use of visual methodologies in his travel writing in London and Manchuria, as well as his novel Sanshirō. In Part I of this thesis, I argue that Sōseki’s anxiety and ambivalence was in part due to the visual culture created around an imperial image infused with symbolic power. Part II of this thesis is almost a reversal of the first, as it discusses Sōseki’s use of deliberately visual methodologies to express his anxiety and ambivalence towards modernity. In light of my discussion of these complex visual techniques, I conclude by briefly addressing the allegations of Sōseki’s complicity in Japanese imperialism and the (non-)politicization of his work. While Sōseki’s anxiety and ambivalence may have been caused by the extremely visual culture centred on the emperor, it also provided him with a means and methodology for expressing his pessimism.

This thesis explores the affect of the emperor-centred visual culture on Sōseki’s use of visual methodologies in his travel writing in London and Manchuria, as well as his novel Sanshirō. In Part I of this thesis, I argue that Sōseki’s anxiety and ambivalence was in part due to the visual culture created around an imperial image infused with symbolic power. Part II of this thesis is almost a reversal of the first, as it discusses Sōseki’s use of deliberately visual methodologies to express his anxiety and ambivalence towards modernity. In light of my discussion of these complex visual techniques, I conclude by briefly addressing the allegations of Sōseki’s complicity in Japanese imperialism and the (non-)politicization of his work. While Sōseki’s anxiety and ambivalence may have been caused by the extremely visual culture centred on the emperor, it also provided him with a means and methodology for expressing his pessimism.

<p>This dissertation investigates the relation between the formation of "Blackness" and the Western tradition of sovereignty through the works of late twentieth century Black Radical theorists. I most specifically examine the work of Stokely Carmichael, Amiri Baraka, Frantz Fanon, and Huey P. Newton in order to delineate a shift within Black Radicalism which, due to an intense de-linking of Black nationalism from the concept of territorial sovereignty throughout the 1960s and early 1970s led to the formation of a new subjectivity ("Blackness") oriented against and beyond the Western tradition of political sovereignty as a whole. </p><p> This dissertation begins by outlining the parameters of the concept of sovereignty as well as its relation to conquest, coloniality, and racialization more generally. I then examine the formation of Black Power as an expression of anti-colonial sentiments present within the United States and uncover there the influence of W.E.B. DuBois' concept of double-consciousness. I then further examine the concept of Black Power through the work of Amiri Baraka and his notion of "Blackness" as the proximity to "home." Each of these expositions of Black Power are undertaken in order to better understand the era of Black Power and its relation to both Black nationalism and the Western tradition of sovereignty. </p><p> Next, I turn to the work of Frantz Fanon, whom I claim prepares the way for the idea of "Blackness" as an ontological resistance beyond, not only the territorial imperative, but also the logic of sovereignty more generally. This notion of "Blackness" as an antidote to sovereign logic present within the work of Fanon allows me to turn to the work of Huey P. Newton in order to demonstrate his conceptualization of "Blackness" as an antagonistic subjectivity within a fully globalized society whose onset he had theorized and which he termed "empire." I conclude by drawing on each of the above theorists as well as the work of Angela Davis in order to build a retrospective summary of this alternative lineage of the Black Radical Tradition and its importance for the conceptualization of resistances to and life beyond our contemporary society.</p> / Dissertation

Thesis (Ph. D.)--University of Oregon, 2001. / Typescript. Includes vita and abstract. Includes bibliographical references (leaves 151-161). Also available for download via the World Wide Web; free to University of Oregon users.

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Uppsatsen är en postkolonial-feministisk läsning av Sofi Oksanens debutroman Stalins kossor. Med utgångspunkt i Frantz Fanons teori, och med en specifikation av den baltiska postkolonialismen såsom Violeta Kelertas beskriver den, undersöks hur Oksanen gestaltar det koloniala och patriarkala förtryckets konsekvenser för karaktären Anna. Dessutom visar uppsatsen hur dessa förtryck är intersektionellt integrerade.