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1
Hughes, Matthew William. "Late Quaternary Landscape Evolution and Environmental Change in Charwell Basin, South Island, New Zealand." Phd thesis, Lincoln University. Agriculture and Life Sciences Division, 2008. http://theses.lincoln.ac.nz/public/adt-NZLIU20080214.132530/.
Full textAbstract:
Charwell Basin is a 6 km-wide structural depression situated at the boundary between the axial ranges and faulted and folded Marlborough Fault Zone of north-eastern South Island, New Zealand. The basin contains the piedmont reach of the Charwell River, and a series of late Quaternary loess-mantled alluvial terraces and terrace remnants that have been uplifted and translocated from their sediment source due to strike-slip motion along the Hope Fault which bounds the basin to its immediate north. The aim of this study was to provide an interdisciplinary, integrated and holistic analysis of late Quaternary landscape evolution and environmental change in Charwell Basin using terrain analysis, loess stratigraphy, soil chemistry and paleoecological data. The study contributes new understanding of New Zealand landscape and ecosystem responses to regional and global climatic change extending to Marine Isotope Stage (MIS) 6, and shows that climatically-forced shifts in biogeomorphic processes play a significant role in lowland landscape evolution.
Morphometric analysis of alluvial terraces and terrace remnants of increasing age demonstrated geomorphic evolution through time, with a decrease in extent of original planar terrace tread morphology and an increase in frequency of steeper slopes and convexo-concave land elements. Paleotopographic analysis of a >150 ka terrace mantled by up to three loess sheets revealed multiple episodes of alluvial aggradation and degradation and, subsequent to river abandonment, gully incision prior to and coeval with loess accumulation. Spatial heterogeneity in loess sheet preservation showed a complex history of loess accumulation and erosion. A critical profile curvature range of -0.005 to -0.014 (d2z/dx2, m-1) for loess erosion derived from a model parameterised in different ways successfully predicted loess occurrence on adjacent slope elements, but incorrectly predicted loess occurrence on an older terrace remnant from which all loess has been eroded. Future analyses incorporating planform curvature, regolith erosivity and other landform parameters may improve identification of thresholds controlling loess occurrence in Charwell Basin and in other South Island landscapes.
A loess chronostratigraphic framework was developed for, and pedogenic phases identified in, the three loess sheets mantling the >150 ka terrace. Except for one age, infrared-stimulated luminescence dates from both an upbuilding interfluve loess exposure and colluvial gully infill underestimated loess age with respect to the widespread Kawakawa/Oruanui Tephra (KOT; 27,097 ± 957 cal. yr BP), highlighting the need for improvements in the methodology. Onset of loess sheet 1 accumulation started at ca. 50 ka, with a break at ca. 27 ka corresponding to the extended Last Glacial Maximum (eLGM) interstadial identified elsewhere in New Zealand. Loess accumulation through MIS 3 indicates a regional loess flux, and that glaciation was not a necessary condition for loess generation in South Island. Loess accumulation and local alluvial aggradation are decoupled: the youngest aggradation event only covers ~12 kyr of the period of loess sheet 1 accumulation. Older local aggradation episodes could not be the source because their associated terraces are mantled by loess sheet 1. In the absence of numerical ages, the timing of L2 and L3 accumulation is inferred on the basis of an offshore clastic sediment record. The upbuilding phase of loess sheet 2 occurred in late MIS 5a/MIS 4, and loess sheet 3 accumulated in two phases in MIS 5b and late MIS 6.
Biogenic silica data were used to reconstruct broad shifts in vegetation and changes in gully soil saturation status. During interglacial/interstadial periods (MIS 1, early MIS 3, MIS 5) Nothofagus¬-dominated forest covered the area in association with Microlaena spp grasses. Lowering of treeline altitude during glacial/stadial periods (MIS 2, MIS 3, MIS 5b, late MIS 6) led to reduction in forest cover and a mosaic of shrubs and Chionochloa spp, Festuca spp and Poa spp tussock grasses. Comparison of interfluve and gully records showed spatial heterogeneity in vegetation cover possibly related to environmental gradients of exposure or soil moisture. A post-KOT peak in gully tree phytoliths corresponds to the eLGM interstadial, and a shift to grass-dominated vegetation occurred during the LGM sensu stricto. Diatoms indicated the site became considerably wetter from ca. 36 ka, with peak wetness at ca. 30, 25 and 21 ka, possibly due to reduced evapotranspiration and/or increased precipitation from a combination of strengthened westerly winds and increased cloudiness, or strengthened southerly flow and increased precipitation. Human influence after ca. 750 yr BP led to re-establishment of grassland in the area, which deposited phytoliths mixed to 30 cm depth in the soil.
A coupled gully colluvial infilling/vegetation record showed that sediment flux during the late Pleistocene was ~0.0019 m3 m-1 yr-1 under a shrubland/grassland mosaic, and Holocene sediment flux was ~0.0034 m3 m-1 yr-1 under forest. This increase of 60% through the last glacial-interglacial transition resulted from increased bioturbation and down-slope soil transport via root growth and treethrow, which formed a biomantle as evidenced by slope redistribution of the KOT. These results contrast with sediment transport rates and processes hypothesised to occur contemporaneously in adjacent mountain catchments. This suggests that intraregional biogeomorphic processes can differ significantly depending on topography and geological substrate, with different landscapes responding in unique ways to the same climate shifts. Analysis of Quaternary terrestrial landscape evolution in non-glaciated mountainous and lowland areas must therefore consider spatial and temporal heterogeneity in sediment fluxes and underlying transport processes.
2
Hughes, Matthew W. "Late Quaternary landscape evolution and environmental change in Charwell Basin, South Island, New Zealand." Lincoln University, 2008. http://hdl.handle.net/10182/305.
Full textAbstract:
Charwell Basin is a 6 km-wide structural depression situated at the boundary between the axial ranges and faulted and folded Marlborough Fault Zone of north-eastern South Island, New Zealand. The basin contains the piedmont reach of the Charwell River, and a series of late Quaternary loess-mantled alluvial terraces and terrace remnants that have been uplifted and translocated from their sediment source due to strike-slip motion along the Hope Fault which bounds the basin to its immediate north. The aim of this study was to provide an interdisciplinary, integrated and holistic analysis of late Quaternary landscape evolution and environmental change in Charwell Basin using terrain analysis, loess stratigraphy, soil chemistry and paleoecological data. The study contributes new understanding of New Zealand landscape and ecosystem responses to regional and global climatic change extending to Marine Isotope Stage (MIS) 6, and shows that climatically-forced shifts in biogeomorphic processes play a significant role in lowland landscape evolution. Morphometric analysis of alluvial terraces and terrace remnants of increasing age demonstrated geomorphic evolution through time, with a decrease in extent of original planar terrace tread morphology and an increase in frequency of steeper slopes and convexo-concave land elements. Paleotopographic analysis of a >150 ka terrace mantled by up to three loess sheets revealed multiple episodes of alluvial aggradation and degradation and, subsequent to river abandonment, gully incision prior to and coeval with loess accumulation. Spatial heterogeneity in loess sheet preservation showed a complex history of loess accumulation and erosion. A critical profile curvature range of -0.005 to -0.014 (d²z/dx², m⁻¹) for loess erosion derived from a model parameterised in different ways successfully predicted loess occurrence on adjacent slope elements, but incorrectly predicted loess occurrence on an older terrace remnant from which all loess has been eroded. Future analyses incorporating planform curvature, regolith erosivity and other landform parameters may improve identification of thresholds controlling loess occurrence in Charwell Basin and in other South Island landscapes. A loess chronostratigraphic framework was developed for, and pedogenic phases identified in, the three loess sheets mantling the >150 ka terrace. Except for one age, infrared-stimulated luminescence dates from both an upbuilding interfluve loess exposure and colluvial gully infill underestimated loess age with respect to the widespread Kawakawa/Oruanui Tephra (KOT; 27,097 ± 957 cal. yr BP), highlighting the need for improvements in the methodology. Onset of loess sheet 1 accumulation started at ca. 50 ka, with a break at ca. 27 ka corresponding to the extended Last Glacial Maximum (eLGM) interstadial identified elsewhere in New Zealand. Loess accumulation through MIS 3 indicates a regional loess flux, and that glaciation was not a necessary condition for loess generation in South Island. Loess accumulation and local alluvial aggradation are decoupled: the youngest aggradation event only covers ~12 kyr of the period of loess sheet 1 accumulation. Older local aggradation episodes could not be the source because their associated terraces are mantled by loess sheet 1. In the absence of numerical ages, the timing of L2 and L3 accumulation is inferred on the basis of an offshore clastic sediment record. The upbuilding phase of loess sheet 2 occurred in late MIS 5a/MIS 4, and loess sheet 3 accumulated in two phases in MIS 5b and late MIS 6. Biogenic silica data were used to reconstruct broad shifts in vegetation and changes in gully soil saturation status. During interglacial/interstadial periods (MIS 1, early MIS 3, MIS 5) Nothofagus-dominated forest covered the area in association with Microlaena spp grasses. Lowering of treeline altitude during glacial/stadial periods (MIS 2, MIS 3, MIS 5b, late MIS 6) led to reduction in forest cover and a mosaic of shrubs and Chionochloa spp, Festuca spp and Poa spp tussock grasses. Comparison of interfluve and gully records showed spatial heterogeneity in vegetation cover possibly related to environmental gradients of exposure or soil moisture. A post-KOT peak in gully tree phytoliths corresponds to the eLGM interstadial, and a shift to grass-dominated vegetation occurred during the LGM sensu stricto. Diatoms indicated the site became considerably wetter from ca. 36 ka, with peak wetness at ca. 30, 25 and 21 ka, possibly due to reduced evapotranspiration and/or increased precipitation from a combination of strengthened westerly winds and increased cloudiness, or strengthened southerly flow and increased precipitation. Human influence after ca. 750 yr BP led to re-establishment of grassland in the area, which deposited phytoliths mixed to 30 cm depth in the soil. A coupled gully colluvial infilling/vegetation record showed that sediment flux during the late Pleistocene was ~0.0019 m³ m⁻¹ yr⁻¹ under a shrubland/grassland mosaic, and Holocene sediment flux was ~0.0034 m³ m⁻¹ yr⁻¹ under forest. This increase of 60% through the last glacial-interglacial transition resulted from increased bioturbation and down-slope soil transport via root growth and treethrow, which formed a biomantle as evidenced by slope redistribution of the KOT. These results contrast with sediment transport rates and processes hypothesised to occur contemporaneously in adjacent mountain catchments. This suggests that intraregional biogeomorphic processes can differ significantly depending on topography and geological substrate, with different landscapes responding in unique ways to the same climate shifts. Analysis of Quaternary terrestrial landscape evolution in non-glaciated mountainous and lowland areas must therefore consider spatial and temporal heterogeneity in sediment fluxes and underlying transport processes.
3
Leier, Andrew. "The Cretaceous Evolution of the Lhasa Terrane, Southern Tibet." Diss., Tucson, Ariz. : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1340%5F1%5Fm.pdf&type=application/pdf.
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Levine, Steven Joel. "Genesis of typic paleorthids and petrocalcic paleargids on the same fan terrace in the Avra Valley near Tucson, Arizona." Thesis, The University of Arizona, 1985. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1985_414_sip1_w.pdf&type=application/pdf.
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Psoma, Elene. "Filmland Griechenland - Terra incognita : griechische Filmgeschichte zwischen Politik, Gesellschaft und internationalen Impulsen /." Berlin : Logos-Verl, 2008. http://d-nb.info/991541324/04.
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Rijsdijk, Ian-Malcolm. "Seeking the other shore : myth and history in the films of Terrence Malick." Doctoral thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/14738.
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Includes bibliographical references (leaves 254-269).Terrence Malick is a unique director in contemporary film, an enigmatic and resolutely independent filmmaker who operates successfully within the studio system of Hollywood. His unusual career - which includes a twenty-year 'sabbatical' during which he appeared to have dropped out of the industry altogether - has produced comparatively little in the way of academic research, though there has been increased activity since the release of The Thin Red Line in 1998. The title - 'Seeking the Other Shore' - provides a thematic approach to the central exploration of the thesis: myth and history in Malick's films. As I argue in the introduction, Malick's characters constantly seek new shores within historical realities, but in so doing they imagine returns to mythic spaces that are either in the past or unattainable in the present. The films themselves provoke us to reconsider particular myths and their historical context. The Introduction includes a brief synopsis of Malick's career and a critical overview of both journalistic and academic writing. A major feature of his films - their intertextuality, from poetry and novels to visual art and music - is also introduced as it plays an important part in all the subsequent chapters. With the release of The New World (2005), I argue that the two recent films should be seen not only as continuing the major themes of historical reality and mythic quest in his 1970s films (Badlands, 1973, and Days of Heaven, 1978), but also as expanding those themes to include colonial encounters with strangeness which underpin the emergence of America as a modem cultural and political entity. Chapter One sets out the historical and mythic terrain upon which all of Malick's films are built, particularly America's nineteenth-century, post-independence character, the idea that America is a nation constantly seeking to renew itself but is never able to outrun the terrors of its previous incarnation, the sins of its fathers. In the section, 'Manufacturing Myth' I use definitions by Claude Levi-Strauss and Richard Slotkin to begin the conversation between history and myth, finding that myth is constructed, laid claim to, and used continuously, and whose claims and uses are inevitably contested. Myths based in history, are, in Richard White's words, "historical creations", and it is this ideological tension between myth and history that one finds in Malick's films. History provides the context for explorations of America's mythic character, myths of innocence, renewal, ambition, and robust individualism. Chapters Two through Five examine the feature films in chronological order. Badlands is discussed in terms of its hybrid genre (drawing on the western and the road movie), before I investigate Holly and Kit's "competing fantasies"- their different views of their adventure and the land through which they travel. Days of Heaven represents a complex examination of the Turnerian myth of the frontier and its transformation at the turn of the twentieth century. Malick's use of period photography is observed as is the influence of American literary naturalism. However, a more significant discussion emerges around the art of Edward Hopper and his modernist interpretation of America coming to terms with its twentieth-century character. The analysis in this section includes Badlands, and illuminates the influence of Hopper on both early films. The Thin Red Line poses something of a problem as it appears to depart from the first two films and The New World, which follows eight years later. As a combat film, it is part of a fairly well-defined and fiercely debated genre, while it's largely male cast and multiple voiceovers differ from the single adolescent female voiceovers of Holly and Linda. However, it challenges the norms of the combat genre in significant ways, particularly in its balancing of personal experience (Malick's screenplay is a subtle adaptation of James Jones's war novels) with historical context (the viewer is alerted, as one rarely is in this genre, to the world outside of the battle). In The New World, Captain John Smith literally seeks the other shore and, like Private Witt in the previous film, encounters a division within himself. In reaffirming the mythic romance between Smith and Pocahontas, Malick opposes the ambition of Enlightenment discovery (m the turbulent heart of Smith) with the sure sense of humanity's relationship with nature (m the calm spirit of Pocahontas). Once again, the film's historical context is the bedrock for its examination of myth, though as the revelatory conclusion, shows, Malick reaches for more spiritual meaning than affirming or revising the historical record. The four feature films that constitute Malick's directorial career thus far are all concerned with fundamental American myths; however, they are also unusual interpretations these myths. Young girls narrate the stories of violent men possessed by the possibilities of a frontier that has passed while young men struggle to come to terms with the extreme violence of battle and the overwhelming strangeness of their surroundings, no matter how 'right' the cause. These are myths born out of history and rendered as cinematic revelations by Terrence Malick.
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Rybin, Steven M. "The Historical Thought of Film: Terrence Malick and Philosophical Cinema." View abstract, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3375107.
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Psoma, Elene. "Filmland Griechenland - Terra incognita griechische Filmgeschichte zwischen Politik, Gesellschaft und internationalen Impulsen." Berlin Logos-Verl, 2006. http://d-nb.info/991541324/04.
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SOUSA, João Augusto Barbosa. "Sistema computacional para análise de fluxo através das barragens de terra e rock-fill utilizando elementos finitos." Universidade Federal de Campina Grande, 1991. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/2130.
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JOÃO AUGUSTO BARBOSA SOUSA - DISSERTAÇÃO PPGECA 1991..pdf: 20226382 bytes, checksum: eba1c136d21ab9224bc5d71dd5640c90 (MD5)Made available in DSpace on 2018-11-06T00:47:32Z (GMT). No. of bitstreams: 1 JOÃO AUGUSTO BARBOSA SOUSA - DISSERTAÇÃO PPGECA 1991..pdf: 20226382 bytes, checksum: eba1c136d21ab9224bc5d71dd5640c90 (MD5) Previous issue date: 1991-03-06
Este trabalho consiste no desenvolvimento e apresentação de uma sistemática de cálculos que, utilizando elementos finitos e microcomputadores, permite dimensionar e posicionar fenômenos hidráulicos no interior dos sistemas, maciços, fundações e dispositivos de proteção das barragens de terra e rock-fill, quando esses se encontrarem em regime permanente e submetidos a variações de fluxo, nas fases de construção, operação e manutenção. Buscando-se atingir ao objetivo pretendido, elaborou-se um sistema de programas e arquivos que, integrados, possibilita a utilização do Programa FPM500 de modo prático. O FPM500 trata dos escoamentos nos meios porosos, confinados e não confinados, nos sistemas bidimensional e/ou tridimensional com simetria de revolução. Entretanto, apesar de flexível, para o seu emprego, era grande a quantidade de dados de entrada a serem informados, diretamente, pelos usuários e, por ser acoplado a um gerador de malhas, aumentava o número de informações, levando esse, na versão original, a ser processado somente em computadores de grande porte. Na sistemática apresentada, inicia-se com um arquivo contendo informações relativas aos blocos estruturais. Um programa acoplado a um renumerador processa essas e renumera todos os nós da malha de elementos, assim reduzindo as bandas das matrizes de fluxo e otimizando memórias em microcomputadores. Este recurso possibilita substancial ganho em velocidade, em busca das soluções dos sistemas com múltiplas equações lineares simultâneas. Os dados resultantes deste processamento permitem a confecção de malhas integradas por elementos triangulares e/ou quadrilaterais lineares, no sistema bidimensional simultâneas. Os dados resultantes deste processamento permitem a confecção de malhas integradas por elementos triangulares e/ou quadrilaterais lineares, no sistema bidimensional
This dissertation deals with the development and the presentation as well of a systematics of calculus that, by making use of finite elements and microcomputers alike, enables both to settle the dimension and the position of hydraulic phenomena in the interior of systems, massifs, foundations and protection organs for earth and rock-fill dams, when the latter are to be found at everlasting rate and suodued to flood variations in the construction, operation and maintenance phases. In the search for an intended purpose, a program and files system was carried out which, once integrated, makes feasible the utilization of Program FPM500 in a practical way. Such a program (viz., FPM500) is related to flows in porous enviroments, restrained or no restrained, in bidimensional and/or tridimensional systems with revolution symmetry. However, despite being flexible for its usage, the quantity of input data to be directly informed by users is huge and, on account of its being coupled to a network generator, it increased the number of informations so that it, at the long run, finished being processed only mainframe computers. In the presented systematics, one begins with a file encompassing informations related to structural blocks. A program coupled to a renumerator processes them and numbers again ali nodes of the elements network by so reducing the flow matrix bandwidth therefore de creasing storage requirements in the computer. Such resource enabls a substantial gain in speed in the systems with mutiple linear simultaneous equations. The data arising from that processing enable the making of integrated networks by triangular and/or four-sided linear elements in the bidimensional system. In another program, the data necessary to the studies of different hydric systems are completed. Therein the outputs of GETOP Program are resettled, the refomations dealing with the boundary conditions and with structural blocks. Such data are kept in files, appropriately shaped in a given format in order to feed Program FPM500. Program FPM500 processes ali elaborated informations as it calculates loads, pressures and flows by providing a report with informations likely to interest studies of hydraulic stability of earth and rock-fill dams. The presented methodology has the advantage to exclude the great amount of blunders committed on input data, in the usage of finite elements thrregh conventional processes. There is also the possibility of a future implementation of graphic programs for drawing element networks thrugh plotter or video. Thus, one is afforded to state that such a systematic, beyond facilitating the calculi, presents confidence and speed as it can be used in different practical equations, the aim of which is likely to be the previous knowledge of the conditions of hydraulic stability in those structures.
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Poch, i. Rodrigo Chantal. "Cineastes d’un món caigut: una interpretació de l’obra d’Andrei Tarkovski, Werner Herzog i Terrence Malick." Doctoral thesis, Universitat Pompeu Fabra, 2020. http://hdl.handle.net/10803/670314.
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Aquesta tesi és una interpretació de l’obra dels cineastes Andrei Tarkovski, Terrence Malick i Werner Herzog des de la idea de la pèrdua d’un vincle entre home i món i la possibilitat de restaurar-lo a través del cinema.This thesis is an interpretation of the work by filmmakers Andrei Tarkovski, Terrence Malick and Werner Herzog from the idea of the loss of a link between man and world and the possibility of restoring it through cinema.
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Robertson-Rintoul, Melanie S. E. "River planform, soil stratigraphy and the temporal and palaeoenvironmental significance of terraced valley fill deposits in upland Scotland, with specific reference to Glen Feshie, south-west Cairngorms." Thesis, University of Hull, 1986. http://hydra.hull.ac.uk/resources/hull:13132.
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River terraces form prominent features of the valley floor morphology of many upland valleys in Scotland. Little is known, however, about valley floor landform development in many of these valleys. Previous studies have generally explained the terraces as the outwash products of meltwaters from the most recent cold periods. Detailed investigation of a major valley in the Scottish Highlands challenges, for at least one site, this well established concept and proposes the occurrence of at least three phases of Holocene terrace development. The correlation of terrace surfaces has traditionally been based upon the construction of height-range diagrams. An alternative approach to terrace correlation and dating is developed in this study using data from Glen Feshie, south-west Cairngorms. Terrace fragments are numerically classified and objectively grouped using quantitative soil-stratigraphic data. Principal Components Analysis and a hierarchical clustering technique numerically define five soil-stratigraphic units and place these on a relative time scale. Various methods of absolute dating control permit association of these units with five phases of terrace development. These are placed at 13,000, 10,000, 3,600, 1,000, 80, radiocarbon years BP. Comparison of palaeochannel networks preserved on the terrace surfaces suggests that these phases of terrace development have been associated with changes in channel pattern morphology. A unified approach to analysis of channel pattern morphology is developed and from this a new technique for palaeohydrological interpretation of gravel-bed streams. A segment density index is developed which allows total sinuosity to be predicted from just a part of the braided channel network. Application of these techniques to the Glen Feshie terraces demonstrates a trend for an overall decrease in discharge from the oldest terrace surfaces to the present day. Assessment of these landform changes within the context of known environmental fluctuations in the Cairngorms suggests that the early-mid Holocene was a period of relative landscape stability while the late Holocene was characterised by increasing instability. These changes may have been associated with the changes in river behaviour. However, spatial variation in the depth of the fill/bedrock interface may produce a discontinuous river response to changing environmental conditions.
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Peters, Nigel Ronald. "Soil development, environmental history and the dating of terraced valley fill deposits in the North York Moors, with specific reference to Dovedale Griff and Jugger Howe Beck." Thesis, University of Hull, 1989. http://hydra.hull.ac.uk/resources/hull:13389.
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Detailed investigation of the valley fill deposits of Dovedale Griff and Jugger Howe Beck, together with a sedimentological and palaeomagnetic investigation of the sediments of Lake Gormire, provide the basis for an integrated analysis of the temporal and palaeoenvironmental aspects of Holocene valley floor landform development in the North York Moors. A Holocene alluvial chronology is developed for Dovedale Griff and Jugger Howe Beck based on surface soil stratigraphy, radiocarbon dating, morphology and sediment stratigraphy. Surface soils developed into the deposits of the Dovedale Griff terrace fragments are divided statistically into three groups of soils using a combination of Principal Components Analysis and Cluster Analysis. The first principal component is shown to be a compound index of soil properties that represent some of the main morphological and chemical properties of brown podzolic soils and the grouped soils are shown to represent a chronosequence of brown podzolic soils. Each cluster of soils represents one soil stratigraphic unit. The age-calibrated surface soil stratigraphic units from Dovedale Griff are used in a Discriminant Analysis procedure to estimate the ages of undated valley floor surfaces in Jugger Howe Beck. An additional soil stratigraphic unit is identified from Jugger Howe Beck. This fourth unit is shown to have a freely drained phase and a gleyed phase. In Dovedale Griff the alluvial surfaces are dated to about 7100BP, 900BP and about 300BP. In Jugger Howe Beck the main alluvial surfaces are shown to be about 10000BP, 900BP and about 300BP in age. These phases of valley floor development are correlated with phases of instability and stability as revealed by erosion indicators from the sediments of Lake Gormire. Two main phases of synchronous behaviour between the three sites are Identified and their environmental significance discussed. These phases occurred at about 1000 - 900BP and again around about 300BP. A phase of synchronous behaviour between Jugger Howe Beck and Gormire are identified atabout 10000BP. Phases of site specific behaviour are also identified at 7100BP in Dovedale and 2500BP in Lake Gormire. The Holocene environmental changes in the North York Moors are placed In the context of valley floor development In upland Britain. Chronologies of valley floor development for upland regions may not reveal a common temporal pattern of response.
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Tolliver, Staci. "Hurting the Ones They Love: Character Analysis and Original Screenplay Crimes of Passion." ScholarWorks@UNO, 2012. http://scholarworks.uno.edu/honors_theses/22.
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The thesis is a ten-page analysis on two films, Fatal Attraction and Lakeview Terrace. The thesis begins with a brief introduction to the horror genre and its subgenre in which the two films and original screenplay are categorized, psychological horror. It covers all the important elements of a film and screenplay: conflict, arc, goal, structure and plot. The thesis also consists of feminists’ reactions to Fatal Attraction, and examines whether the original 60- page screenplay helps or worsens the image of women. The screenplay also raises the question if having the villains need to be insane to prove a point. Further in the thesis is a description of the original screenplay Crimes of Passion and its main characters Jennifer, Alex and Keith. Jennifer, the heroine, becomes the target of scorned lover and police officer Keith. Alex, Keith’s rival, must protect Jennifer. The analysis ends with the restated questions the audience must have in mind and answer while reading the screenplay.
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Sergio, Vanessa. "Macao : vie culturelle et littéraire d’expression portugaise au milieu du XXe siècle : Luís Gonzaga Gomes, ‘Fils de la Terre’." Thesis, Paris 10, 2012. http://www.theses.fr/2012PA100158/document.
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Dans quelle mesure les années 50 marquent-elles un renouveau dans la vie culturelle et littéraire de Macao, incarné par une élite locale d’intellectuels portugais et macanais, dans un espace profondément colonial, quels en sont les enjeux ? Ce renouveau culturel qui s’exprime à travers la presse et diverses manifestations culturelles locales, s’articule avec la revendication d’une identité macanaise, qui s’inscrit dans la culture portugaise au sens large (le discours colonial n’étant jamais bien loin). Derrière cette revendication identitaire, au sortir de la Seconde guerre mondiale, se cache une lutte pour la survie du territoire, sous le regard critique de la communauté internationale. Ce nouveau souffle apporté à la vie culturelle et littéraire de Macao se traduit dans l’échange interculturel luso-chinois, comme l’illustre l’œuvre de Luís Gonzaga Gomes. Ce ‘Fils de la Terre’, vecteur de cet échange, incarne la vocation et l’esprit macanais : servir de ‘pont’ entre deux cultures, deux civilisations. Son œuvre permet la transition entre un environnement culturel colonial et un environnement culturel postcolonial ou le passage d’un discours nationaliste et égocentrique à un discours plus tolérant, tourné vers l’autre et ouvert sur le monde ‘non lusophone’. Néanmoins, ce nouveau discours se heurte à des limites imposées par le contexte politique et la mentalité de l’époqueTo what extent do the 50s mark a renewal in Macao’s culture and literature which is embodied by local intellectual Portuguese and Macanese elites in a deeply colonial space? What are their outcomes? This cultural renewal, expressed through the mass media and various local cultural events, is expressed with the claim of a Macanese identity which has been part of the Portuguese culture in the broad sense (the colonial discourse has never been very far). At the end of the Second World War, this identity claim bears in its layers a struggle for the survival of the territory, under the international community’s critical scrutiny. This new lease brought to the cultural and literary life of Macao is reflected in the Luso-Chinese cultural exchange, as it is illustrated in Luís Gonzaga Gomes’ work. This Son of Macao, who is a vector of this exchange, embodies the Macanese vocation and spirit: providing a bridge between two cultures, between two civilizations. His work makes the transition from a colonial cultural environment to a postcolonial cultural environment possible; where lies a crossing from a nationalist and egocentric speech to a more tolerant one, turning towards the other and open to the non-Lusophone/Portuguese world. However, this new discourse is facing limitations imposed by the political context and the mentality of the time
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Bourgevin, Elisabeth. "Etude des relations entre belle-mère et belle-fille à Taiwan selon les revues, les journaux et une enquête personnelle sur le terrain." Paris 7, 1989. http://www.theses.fr/1989PA070071.
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"Malgré le progrès de la technologie et l'augmentation du niveau de vie à Taiwan, les problèmes relationnels entre belle-mère et belle-fille existent toujours. C'est un problème de société: les mentalités n'évoluent pas aussi vite que le progrès de la société et l'on n'efface pas le poids de la tradition en si peu de temps. C'est un devoir impose par le ciel que d'entretenir ses parents âgés: cela fait partie de la pièté filiale. Le conflit des générations, la cohabitation aggravent encore le problème. Pour soixante-dix-sept pour cent des belles-filles interrogées, le problème des belles-mères reste "important" ou "très important", d'où l'intérêt de cette étude. La solution à ce problème, selon moi, est d'habiter au voisinage de ses beaux-parents âgés, mais pas avec eux. On pourra garder son indépendance tout en s'occupant d'eux. "Although the technology and the high standard of living make taiwan a modern country, the problem between mother-in-law and daughter-in-law does not disappear with the modern life. Mentalities do not develop as quickly as the progress of the society. The chinese people respect their traditions and their culture: to have respectful affection toward their parents, to attend to their old parents are a heavenly duty. Generation gap, cohabitation increase the gravity of this problem. Seventy-seven per cent of daughters-in-law enquired in this study think that this problem is "important" or "very important". How to resolve the problem? I think to live not far from her parents-in-law is a good solution, because the daughterin-law is independant, but at the same time, she can take care of them
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Bonturim, Everton. "Controle de propriedades multiferroicas em filmes finos óxidos dopados com íons terras raras para aplicação como dispositivos lógicos e de memória." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-30102017-090010/.
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Nas últimas décadas, o consumo de dispositivos eletrônicos e a alta demanda por armazenamento de dados tem mostrado grandes oportunidades para a criação de novas tecnologias que garantam as necessidades mundiais na área de computação e desenvolvimento. Alguns materiais multiferroicos tem sido amplamente estudados e o BiFeO3, considerado o único material multiferroico em temperatura ambiente, ganhou destaque como candidato para produção de dispositivos lógicos e de memória. O uso de técnicas de crescimento como a deposição por laser pulsado permitiu a produção de filmes finos de BiFeO3 com elevado controle de qualidade. Heteroestruturas de filmes multiferroicos de BiFeO3 e LaBiFeO3 foram crescidas com diferentes espessuras sobre substratos de SrTiO3(100), DyScO3(110) e SrTiO3/Si(100) para avaliação e teste de suas propriedades elétricas e magnéticas. Filmes ferromagnéticos de Co0,9Fe0,1 foram depositados por sputtering sobre os filmes multiferroicos para avaliação da interação interfacial entre ordenamentos magnéticos. Técnicas como fotolitografia foram utilizadas para padronização de microdispositivos gravados sobre as amostras. Tanto os filmes finos de BiFeO3 como os de LaBiFeO3 foram crescidos epitaxialmente sobre os substratos já cobertos com uma camada buffer de SrRuO3 usado como contato elétrico inferior. A estrutura cristalina romboédrica das ferritas de bismuto foi confirmada pelos dados de difração de raios X, bem como a manutenção de tensão estrutural causada pela rede cristalina do substrato para amostras de 20 nm. Os valores de coeficiente do tensor piezelétrico d33 foram da ordem de 0,15 V (∼ 60 kV.cm-2) para amostras com 20 nm de espessura enquanto que os valores de voltagem coerciva para as análises de histerese elétrica foram da ordem de 0,5 V para as mesmas amostras. A relação de coercividade elétrica com a espessura corresponde ao perfil encontrado na literatura pela relação E≈d-2/3. As amostras de CoFe/BFO e CoFe/LBFO depositadas em diferentes substratos apresentam acoplamento interfacial entre ordenamento ferromagnético e antiferromagnético com momento ferromagnético de rede.For the last few decades, the consumption of electronic devices and the high demand for data storage have shown great opportunities to create modern technologies that assure the worldwide needs in computing and development. Some multiferroic materials have been extensively studied and BiFeO3, considered the only multiferroic material at room temperature, has received attention as a candidate to produce logic and memory devices. The use of growth techniques such as pulsed laser deposition allowed the production of thin films of BiFeO3 with high quality control. Multiferroic film heterostructures of BiFeO3 and LaBiFeO3 were grown with different thicknesses on SrTiO3 (100), DyScO3 (110) and SrTiO3/Si (100) substrates to evaluate and test their electrical and magnetic properties. The allow Co0.9Fe0.1 ferromagnetic films were deposited by sputtering on the multiferroic films to evaluate the interfacial interaction between magnetic ordering. Techniques such as photolithography were used to pattern microdevices on the samples. Both the BiFeO3 and LaBiFeO3 thin films were grown epitaxially on the substrates already covered with a SrRuO3 buffer layer used as the lower electrical contact. The rhombohedral crystalline structure of the bismuth ferrites was confirmed by the X-ray diffraction data as well as the strain maintenance caused by the crystal lattice of the substrate for 20 nm samples. The coefficient values of the piezoelectric tensor d33 were around 0.15 V (∼ 60 kV.cm-2) for 20 nm thick samples whereas the coercive voltage values for the electrical hysteresis analyzes were about 0.5 V for the same samples. The relation between electric coercivity and the thickness corresponds to the profile found in the literature by the relation E≈d-2/3. The samples of CoFe/BFO and CoFe/LBFO deposited in different substrates present interfacial coupling between ferromagnetic and antiferromagnetic arrangement with net ferromagnetic moment.
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Alam, Muhammad Mansoor. "Corrigé de localisation dans un environment extérieur sans fil en utilisant estimation, filtrage, la prévision et des techniques de fusion : une application par wifi utilisant le terrain à base de connaissances." Phd thesis, Université de La Rochelle, 2011. http://tel.archives-ouvertes.fr/tel-00815919.
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L'estimation de la position des noeuds de communication sans fil est un domaine de recherche très populaire au cours des dernières années. La recherche de l'estimation de l'emplacement n'est pas limitée à la communication par satellite, mais elle concerne aussi les réseaux WLAN, MANET, WSN et la communication cellulaire. En raison de la croissance et de l'évolution des architectures de communication cellulaire, l'utilisation des appareils portables a augmenté rapidement, et les appels provenant d'utilisateurs mobiles ont également rapidement augmenté. On estime que plus de 50% des appels d'urgence sont émis par des téléphones mobiles. Les chercheurs ont utilisé différentes techniques d'estimation de la position, tels que les satellites, les techniques statistiques et la cartographie. Afin d'atteindre une meilleure précision, certains chercheurs ont combiné deux ou plusieurs techniques. Cependant, l'estimation de la position basée sur le terrain est un domaine qui n'a pas été considéré en profondeur par les chercheurs. Grâce aux ondes radio qui se comportent différemment dans des atmosphères différentes, les calculs à l'aide de quelques paramètres ne sont pas suffisants pour atteindre une précision avec différents terrains, surtout quand il sont totalement basés sur le format RSS, qui entraine des altérations.Cette recherche se concentre sur la localisation des noeuds de communication sans fil en utilisant des techniques géométriques et statistiques, et en prenant en compte l'altération et l'atténuation des terrains. Le modèle proposé est constitué de quatre étapes, qui sont l'estimation, le filtrage, la prédiction et la fusion. Un prototype a été construit en utilisant le WiFi IEEE 802.11x standard. Dans la première étape, en utilisant le rapport signal-bruit de la zone géographique, la péninsule Malaisienne est classée en 13 types de terrains différents.Dans la deuxième étape, les points de données point-à-point sont enregistrés en utilisant la force du signal disponible et en recevant la puissance du signal en considérant différents types de terrains. L'estimation de la localisation se fait au cours de troisième étape en utilisant la célèbre méthode de triangulation. Les résultats estimés sont encore filtrés dans la quatrième étape en utilisant la moyenne et la moyenne des moyennes. Pour la correction des erreurs, le filtrage de l'emplacement est également fait en utilisant la règle des plus proches voisins. La prédiction est affinée au cours de la cinquième étape en utilisant la variance combinée qui permet de prédire la région considérée. L'utilisation des régions d'intérêt contribue à éliminer les emplacements situés à l'extérieur de la zone sélectionnée. Au cours de la sixième étape, les résultats du filtrage sont fusionnés avec la prédiction afin d'obtenir une meilleure précision.Les résultats montrent que les recherches effectuées permettent de réduire les erreurs de 18 m à 6 m dans des terrains fortement atténués, et de 3,5 m à 0,5 m dans des terrains faiblement atténués.
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Figueirôa, Ferreira Alexandre. "La Vague du Cinema Novo en France fut-elle une invention de la critique ?" Paris 3, 1999. http://www.theses.fr/1999PA030034.
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Dans les annees 60 le cinema novo bresilien a occupe en france une place particuliere parmi les nouveaux cinemas. Cela fut rendu possible par la promotion de ce mouvement accomplie par certains critiques des revues cinematographiques specialisees. Les revues rendirent possible l'attribution d'une valeur culturelle aux oeuvres du cinema novo, permettant ainsi sa reconnaissance en tant qu'invention d'une conception originale du cinema. Les interpretations du cinema novo ont ete reperees a travers les textes parus dans les revues. L'orientation du travail est surtout historique et socioculturelle. On y esquisse une methode pour rendre compte des particularites des situations de communication etudiees sans pour autant engager une etude des medias ou une etude semiolinguistique (bien qu'on utilise certaines procedures relevant de ces disciplines). Ce travail demontre d'abord comment la circulation des idees a permis la conception d'un modele culturel pour le cinema novo. Ce modele fut elabore a partir d'une recherche de significations communes, suggerant une correspondance des codes entre les cultures francaise et bresilienne, et il fut legitime a partir des accords ideologiques prealables etablis entre les partenaires de ce processus. On demontre ensuite que le cinema novo, pour etre convaincant comme modele de cinema social et politique convenant aux besoins de la critique francaise et aux strategies promotionnelles qu'elle convoque, jouait des roles determines par les a priori redactionnels des revues, roles dont le principal fut celui de substitut du neorealisme italien et de la nouvelle vague francaiseIn the 1960s, as a result of the promotional movement carried out by critics writing for specialised cinema periodicals, the brazilian cinema novo held a privileged position among the new cinemas. Those periodicals provided the means through which the cinema novo films were given their particular cultural value. As a consequence, this body of films gained recognition as a movement that created an innovative conception of film-making. The interpretations of the cinema novo propounded were elaborated form the observation of the discursive reality perceptible in the periodicals. The approach given to the present work is mostly a historical and socio-cultural one. An analytical method has been draw up in order to account for the particularities of the communication categories examined. However it is neither a media or a semiological and linguistic study, even though both these domains have provided useful techniques. Firstly, this study shows how the spread of ideas produced a cultural model for the cinema novo based on the research of signs common to both the french and the brazilian cultures, so that a pattern off corresponding codes uniting these two cultures could be set. The legitimacy of this cultural model was to be found in ideological agreements previously established between the parties involved in the process. Then, we show that in order to meet the needs of the specialised french critics, who searched for a convincing model of social and political cinema, and those of their promotional strategies, the cinema novo had to fit in the roles determined by editorial tenets upheld in the periodicals. Thus, the main role the cinema novo had to play was that of a replacement for the italian neorealism and for the french new wave
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Silva, Rodrigo do Carmo. "O ensino de análise combinatória com aulas expositivas e fichas de aula em uma escola de ensino médio do interior paulista." Universidade Federal de São Carlos, 2012. https://repositorio.ufscar.br/handle/ufscar/4452.
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Previous issue date: 2012-03-09The following paper is a description of a research performed with second year of high school students, in a school in the inland of the state of São Paulo, over the topic of Combinatorial Analysis. Such topic is normally neglected in this teaching level. According to the National Teaching Parameters (Parâmetros Curriculares Nacionais PCN), the topic of Combinatorial Analysis is a theme with its place in the normal contents of the second year of high school, being so, the intervention was performed with students of this level. The intervention entails two Diagnoses Files (one applied in the beginning of the research, and the other in the end, serving as a comparison tool) and three Classroom Files, which take into consideration all the Combinatorial Analysis to be developed in High School. Each Diagnosis File has 5 exercises about counting, and each Classroom File has a summary of the theory developed with the participation of the teacher and the students in the form of theoretical and practical classes, and some exercises for the application of the theory developed in the Classroom File. Analysis, comments and comparisons collected by the teacher in the application of the classroom files are described in this paper. The final product of this Master degree thesis is available in the web site of Programa de Pós Graduação em Ensino de Ciências Exatas PPGECE (Postgraduate program of exact sciences teaching): www.ppgece.ufscar.br
O trabalho apresentado a seguir, é a descrição e o relato de uma pesquisa realizada com alunos do segundo ano do Ensino Médio, em uma escola no interior do Estado de São Paulo sobre o tema de Análise Combinatória, tema este que corriqueiramente é negligenciado nesse nível de ensino. Segundo os Parâmetros Curriculares Nacionais (PCN), o tema Análise Combinatória tem espaço no conteúdo programático da segunda série do Ensino Médio, e assim sendo, a intervenção foi feita com alunos desse nível escolar. Tal intervenção consta de duas Fichas-Diagnóstico (uma aplicada no início da pesquisa e outra aplicada ao final da pesquisa, servindo como instrumento de comparação), e três Fichas de Aula, que contemplam toda a Análise Combinatória descrita para ser desenvolvida no Ensino Médio. Cada Ficha Diagnóstico tem cinco exercícios sobre contagem, e cada Ficha de Aula tem um resumo da teoria desenvolvida in loco com a participação do professor e dos alunos na forma de aula expositiva, e alguns exercícios para aplicação da teoria desenvolvida na Ficha de Aula. As análises, comentários e comparações coletados pelo professor na aplicação das Fichas de Aula estão descritas nessa Dissertação. O produto final do Mestrado Profissional está disponível no site do Programa de Pós Graduação em Ensino de Ciências Exatas - PPGECE: www.ppgece.ufscar.br
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Eklund, Thorbjörn. "The use of Digital Visual Effects in contemporary TV-series : An analysis of the use of digital visual effects as a narrative device in the television series Doctor Who, Defiance and Terra Nova." Thesis, Linköpings universitet, Avdelningen för Kultur, samhälle, mediegestaltning – KSM, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-109066.
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In this thesis the argument of a new visual language as a narrative device will be discussed and looked at, by analyzing four different TV-series in the science-fiction genre: Terra Nova 2011, Defiance 2013-, Doctor Who 1963 – 1989 and Doctor Who 2005-. It will be possible to see the use of digital visual effects as a narrator in the image. To do this one main question has been asked and to be able to answer that question a framework model has been created, consisting of seven different questions: How are DVFx used as a visual language in the TV-series? What key elements drive the TV-series forward? What influence did DVFx have on the TV-series? How is DVFx used in the series as a narrator? What does DVFx represent in the image? Could the series have been created without DVFx? Techno-enhancement, visual language or hybrid?
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Skříčková, Alžběta. "Rehabilitační centrum Pasohlávky." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392069.
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The diploma thesis deals with the design of a rehabilitation center, which is located in the cadastral area of the village Mušov on the border of the village Pasohlávky. It is a two-storey rehabilitation center with a gym and a partial basement. The thesis deepens the initiative of Thermal Pasohlávky, which plans to build a spa resort in the same section, combining elements of spa care, recreation and sports use. The object fulfills the function of a rehabilitation medical facility. The center is designed for up to 50 patients and is functionally divided into three parts. The first part consists of rehabilitation. We will find here several exercise rooms, hydrotherapy, electrotherapy, doctor's office with waiting room and reception. Rehabilitation also includes a gym with access to the terrace and park. On the second floor we can find specialized department of ergotherapy for people with different types of disabilities and second functional part of the bulding designed for staff facilities. It is made up of staffing facilities, dressing rooms, offices and meeting rooms. The third functional part consist from the technical background of the building and is located on the ground floor. The object is designed as a wall system, built from sand-lime bricks km beta Sendvix and insulated with the ETICS thermal insulation made from mineral wool. Horizontal supporting structures are designed as reinforced concrete. The entire building is roofed with a flat roof. Wooden windows and doors are used in the building to fill the holes. Before the building is a parking lot for employees and visitors of the rehabilitation facility. The design respects the principles of barrier-free solutions. The bachelor thesis is elaborated in the form of a project documentation for the execution of the construction.
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Puglia, Gianlucca Oliveira. "Exploring atomicity on memory mapped files based on non-volatile memory file systems." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2017. http://tede2.pucrs.br/tede2/handle/tede/7768.
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As tecnologias de mem?rias n?o-vol?teis s?o uma grande promessa na ?rea de arquitetura de computadores e ? esperado que sejam poderosas ferramentas para solucionar os problemas referentes a manipula??o eficiente de dados dos dias de hoje. Estas tecnologias prov?m alta performance e acesso em granularidade de bytes com a distinta vantagem de serem persistentes. Por?m, afim de explorar estas tecnologias em todo seu potencial, os sistemas e arquiteturas de hoje precisam buscar meios de se adaptar a esta nova forma de acessar dados e de superar os desafios que v?m com ela.Trabalhos existentes na ?rea j? prop?em m?todos para adaptar as arquiteturas existentes para o uso de NVM bem como formas inovadoras de empregar estas mem?rias em futuras aplica??es. No entanto, o suporte dos sistemas operacionais a estas solu??es, ainda que existente, ainda ? muito limitado. Neste trabalho, n?s apresentamos duas varia??es da chamada de sistema msync, modeladas para explorar as caracter?sticas das tecnologias de NVM e garantir consist?ncia para os dados dos usu?rios. Ambas s?o solu??es simples que permitem aos usu?rios definirem checkpoints de seus arquivos usando a sintaxe comum de sistemas de arquivos. N?s implementamos e testamos estes m?todos sobre o sistema operacional Linux utilizando como base um sistema de arquivo nativamente voltado a NVM. Nossos resultados mostram que estes mecanismos s?o capazes de garantir a integridade dos arquivos mesmo na presen?a de falhas no sistema enquanto mant?m uma performance razo?vel.
Upcoming non-volatile memory technologies are a big promise in computer architecture and are expected to be powerful tools to address today?s issues regarding efficient data manipulation. They provide high performance and byte granularity while also having the distinct advantage of being persistent. However in order to explore these technologies to their full potential, existing systems and architecture must adapt to this new way of working with data and workaround the challenges that come with it. Existing work in the area already proposes methods to adapt existing architecture to NVM as well as innovative ways to employ these memories in future applications. However operating system support to such NVM-enabled solutions, although existent, still very limited. In this work, we present two variations of the existing mmap system call, designed to both explore NVM characteristics and provide user data consistency. Both are very simple solutions that allow users to control the persistence and define checkpoints to their files while using the common mapped file syntax. We have implemented and tested these methods over Linux using a NVM file system as our base. Our results show that these mechanisms can ensure file integrity in the presence of system failures while also providing a reasonable performance.
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Silva, Marcio Carvalho da. "A saga de Raquel nas terras do Patriarca : o mito da donzela-guerreira na narrativa de Alina Paim." Universidade Federal de Sergipe, 2017. http://ri.ufs.br:8080/xmlui/handle/123456789/5739.
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Cette thèse vise à analyser, dans le roman L'Ombre du patriarche (1950), d’Alina Paim, les points d’adéquation et d’enlèvement du mythe traditionnel de la jeune fille-guerrier à fin de, ensuite, dessiner et illustrer la saga héroïque de la caractère Rachel, protagoniste de l'oeuvre. La sélection de ce roman était due à plusieurs similitudes entre la protagoniste et l'archétype de la jeune fille-guerrier, même en tenant compte du fait qu'elles sont placés dans des différents contextes socio-historiques. Cette recherche examinera comment la jeune fille-guerrier se présente dans le travail de Paim, en se détectant jusqu’à quelle mésure le récit peut contempler les marques de ce mythe. Comme support théorique, nous avons utilisé en plus, bien sûr, de la jeune fille-guerrier traditionnelle, presentée par Walnice Nogueira Galvão, le travail de Fabiana Ribeiro Batista sur la figuration de la jeune fille-guerrier à partir de l'approche hybride et d’un nouveau sens. Cette recherche est également soutenue par les contributions théoriques et méthodologiques de Joseph Campbell et Mircea Eliade ainsi que dans la théorie féministe et la critique littéraire. Après l'analyse du travail, nous avons confirmé l'hypothèse initiale qui a guidé le travail, à savoir, Alina Paim reprend le mythe de la figure féminine de jeune fille-guerrier dont les origines se perdent au fil du temps, en la revitalisant dans l'époque contemporaine.Esta dissertação tem como objetivo analisar no romance A sombra do patriarca (1950), de Alina Paim, os pontos de adequação e afastamento do mito tradicional da donzela-guerreira a fim de, a seguir, traçar e ilustrar a saga heroica da personagem Raquel, protagonista da obra em foco. A seleção do referido romance deveu-se às várias semelhanças entre a protagonista e o arquétipo da donzela-guerreira, mesmo levando em consideração o fato de estarem inseridas em contextos sócio-históricos distintos. A presente pesquisa verificará como a donzela-guerreira se apresenta na obra de Paim, detectando-se até que ponto a narrativa consegue contemplar as marcas do referido mito. Como suporte teórico recorreu-se, além, logicamente, da donzela-guerreira tradicional apresentada por Walnice Nogueira Galvão, a Edilene Ribeiro Batista sobre a figuração da donzela-guerreira a partir da abordagem híbrida e ressignificada. Esta pesquisa encontra-se apoiada também nos aportes teórico-metodológicos Joseph Campbell e Mircea Eliade, bem como na teoria e crítica literária feminista. Após a análise da obra, confirmou-se a hipótese inicial que norteou o trabalho, ou seja, Alina Paim retoma o mito da donzela-guerreira, figura feminina cujas origens se perderam ao longo do tempo, revitalizando-a na contemporaneidade.
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Oliveira, Josiane Peres Soares de. "LINGUAGENS EM AÇÃO: Estudos interartísticos em Epopeia do Sertão, de William Agel de Mello e Deus e o Diabo na Terra do Sol, de Glauber Rocha." Pontifícia Universidade Católica de Goiás, 2018. http://tede2.pucgoias.edu.br:8080/handle/tede/3945.
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This paper focuses on literary and cinematographic languages, taking as its object the novel, Epopeia dos Sertões, by William Agel de Mello and Deus e o Diabo na Terra do Sol, by Glauber Rocha, works that dialogue, from a thematic point of view , aesthetic and imaginary, considering the ways of construction of contemporary art. Considering the importance of comparative approaches to literary criticism and interarting studies, this form of interpretive analysis is applied in the bases of this study, in an effort to grasp the power of narrative and discourse both in romanesque scenes and in filmic images , highlighting and comparing excerpts from the novel by William Agel de Mello and the film by Glauber Rocha. It is worth noting that in the first moment we dealt with the possible dialogues between literature and cinema, comparing the frontiers of narrative discourse with those of cinematic discourse, emphasizing their identity traits in order to access their differences and approximations, the focus of our analysis rests on the images and scenes, starting from a more open and general view, as to the narrative modes of romance and film, in order finally to proceed to the appreciation, the more restricted plans, punctuating metaphors and allegories in the compositional spectrum of the two in order to reach its significant structures in this way and, with this, to offer subsidies for other works that aim at peering at the senses and sensitivities contained therein.
Esse trabalho centra-se nas linguagens, literária e cinematográfica, tomando como objeto o romance, Epopeia dos Sertões, de William Agel de Mello e Deus e o Diabo na Terra do Sol, de Glauber Rocha, obras que dialogam, do ponto de vista temático, estético e imagético, considerando os modos de construção da arte contemporânea. Tendo em vista a importância das abordagens comparativistas para a crítica literária e para os estudos interartísticos essa forma de análise interpretativa é aplicada nas bases deste estudo, num esforço para se apreender o poder da narrativa e do discurso, tanto nas cenas romanescas como nas imagens fílmicas, destacando e comparando excertos do romance de William Agel de Mello e do filme de Glauber Rocha. Destaca-se que, no primeiro momento, ocupamo-nos dos diálogos possíveis entre a literatura e cinema, cotejando as fronteiras do discurso narrativo com as do discurso cinematográfico, enfatizando os seus traços identitários para acessar as suas diferenças e aproximações e, em sequência, o foco de nossa análise recai sobre as imagens e cenas, partindo de uma visão mais aberta e geral, quanto aos modos narrativos romanesco e fílmico para, finalmente, procedermos à apreciação, os planos mais restritos, pontuando metáforas e alegorias no espectro composicional dos dois textos em pauta, no intuito de alcançar por esta via suas estruturas significativas e, com isso, oferecer subsídios para outros trabalhos que objetivem perscrutar os sentidos e sensibilidades aí contidos.
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Rašovská, Michaela. "Revitalizace areálu Filmových ateliérů Zlín." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-394031.
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Diploma thesis addresses the new use of film studios in the city of Zlin – Kudlov. Solved territory is located about 2.5 km southeast of Zlin. The aim of the design was to create a functioning unit, which combines several functions, both existing and proposed. The resort is located on one of the highest points in the area with beautiful views of the surrounding area. In the area of film studios is therefore proposed tower, which is inspired by the film strip and dominates the area. Film studios are also associated with the emergence of the Zlin Film Festival. There is therefore designed pedestrian zone with squares for cultural events and exhibitions related to film themes. The proposal seeks to create a living organism that would be returned to the film studios lost life.
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Salhi, Rached. "Effet de l'humidité du gaz vecteur et de l'assistance UV dans le procédé aérosol CVD pour l'élaboration de couches mines fluorescentes dopées terre rare." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00625424.
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Le développement de couches minces dopées terres rares a suscité un regain d'intérêt au cours des dernières années. Dans ce mémoire nous présentons l'élaboration des couches minces d'yttria (Y2O3), d'alumine (Al2O3) et les couches mixtes Y2O3-Al2O3 dopées erbium. La technique utilisée est le procédé de dépôt chimique en phase vapeur à partir de précurseurs organométallique (MOCVD) assisté par aérosol. Un dispositif d'irradiation UV est appliqué afin d'assister le processus de réaction avec une modification de l'hygrométrie de l'air vecteur. Les meilleures propriétés sont obtenues pour les couches déposées sous une forte humidité de l'air vecteur et avec l'assistance UV. Dans ces conditions les couches d'yttria présentent une faible vitesse de croissance, une faible contamination organique et une bonne cristallinité dans la phase cubique de l'yttria. Plusieurs phénomènes d'Up-conversion ont été mis en évidence dans les spectres de fluorescence visible de l'erbium dans l'yttria. Une durée de vie du niveau 4I13/2 de l'erbium de 3.07 ms a été mesurée pour ce matériau après recuit à 800°C. Cette valeur est supérieure à celle obtenue pour l'échantillon déposé sous une faible humidité de l'air et sans l'assistance UV après recuit à 1000°C. Les couches d'alumine déposées dans les conditions optimales présentent des vitesses de croissance élevées et se caractérisent par une grande stabilité thermique, permettant l'élimination complète des impuretés tout en restant amorphe. Enfin, l'étude du système Y2O3-Al2O3 montre que les conditions de dépôt jouent un rôle important sur la composition et les propriétés physico-chimiques des dépôts.
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Andrieu, Sylvie. "Etude des proprietes d'ecriture thermomagnetique de couches minces d'alliages amorphes de terre rare et de metaux de transition, destines a l'enregistrement de memoires de masse." Paris 6, 1988. http://www.theses.fr/1988PA066024.
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L'echauffement de l'alliage sous l'effet du laser focalise est etudie par simulation numerique de l'equation de diffusion de la chaleur, en faisant varier les parametres physiques du systeme. On etudie experimentalement sur plusieurs familles d'alliages la taille et la forme des domaines inscrits en fonction des parametres de l'installation. A partir de mesures experimentales de trainage magnetique, on interprete la formation du domaine par nucleotrons dont la largeur est du meme ordre de grandeur que la largeur de paroi et par deplacement de ces parois
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Munaretto, Juliana Scariot. "Determinação de disruptores endócrinos em filé de peixe utilizando QuEChERS modificado e GC-(TQ)MS/MS." Universidade Federal de Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/10502.
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Conselho Nacional de Desenvolvimento Científico e TecnológicoEndocrine Disrupter Compounds (EDCs) like pesticides, alkylphenols and hormones among other classes of compounds are responsible for alterations in the endocrine system functions. Endocrine disruption occurs when EDCs interact with the hormone receptors, altering the natural response patterns of the endocrine system. Aquatic organisms, such as fish, are able to accumulate EDCs residues in concentration several times higher than the surrounding water. Consequently, fish is a major source of contamination for both top predators and human consumers. This study aimed to develop and validate a fast method for the determination of 40 endocrine disrupters in fish fillet, using modified QuEChERS and Gas Chromatography coupled with Mass Spectrometry in tandem, using a triple quadrupole analyzer (GC-(TQ)MS/MS). A factorial design was performed to optimize the extraction procedure, which consist of the extraction of 10.0 g of fish fillet with 10.0 mL of acetonitrile with 1% (v/v) of acetic acid followed by manual shaking for 1 min. In the partition step 2.0 g of sodium chloride, 1.7 g of anhydrous sodium acetate and 0.3 g of anhydrous magnesium sulfate were added, followed by shaking and centrifugation at 3400 rpm for 8 min. Then the extract was transferred to a 15 mL polypropylene tube containing the C18 and PSA sorbents, beyond the anhydrous magnesium sulfate. After shaking and centrifuging, the supernatant was filtered and analyzed by GC-(TQ)MS/MS. The method was validated by spiking the blank sample at three concentration levels (10, 25 and 50 Ug kg-1) obtaining recovery values between 70.1 to 120.0% for 36 of the 40 endocrine disrupters evaluated. RSD values below 20% ensured the good precision of the method. The linearity was evaluated using the coefficient of determination (r2) with values higher than 0.996 for all compounds. The matrix effect was evaluated, and it was pretty intense for most compounds, with values exceeding 10%. This effect was compensated using analytical curves obtained with standards prepared in blank matrix extracts. This method was applied in 6 samples of fish fillet from different species. Residues of bisphenol A, chlorpyrifos and bifenthrin were detected. Therefore, the modified QuEChERS method proved to be appropriated for the determination of endocrine disrupters in fish fillet using GC-(TQ)MS/MS since it showed to be effective and can be applied to routine analysis.
Compostos conhecidos como disruptores endócrinos (DEs), tais como agrotóxicos, alquilfenóis, hormônios, dentre outras classes de substâncias são responsáveis pela alteração de funções do sistema endócrino. Esse efeito ocorre quando os DEs interagem com os receptores hormonais, alterando os padrões de resposta natural do sistema endócrimo. Os organismos aquáticos, como os peixes são capazes de acumular concentrações de DEs várias vezes superiores a água ao seu redor. Consequentemente, os peixes são uma importante fonte de contaminação para seus predadores e consumidores humanos. O presente trabalho teve como objetivo desenvolver e validar um método rápido para a determinação de 40 disruptores endócrinos em filé de peixe (jundiá), utilizando QuEChERS modificado e Cromatografia Gasosa acoplada à Espectrometria de Massas em série, empregando analisador triplo quadrupolo (GC-(TQ)MS/MS). Utilizou-se do planejamento fatorial em estrela para otimização do procedimento de extração, o qual consiste da extração de 10,0 g de filé de peixe com 10,0 mL de acetonitrila/1% (v/v) ácido acético seguido de agitação manual por 1 min. Na etapa de partição adicionou-se 2,0 g de cloreto de sódio, 1,7 g de acetato de sódio anidro e 0,3 g de sulfato de magnésio anidro. Realizou-se agitação por 1 min e centrifugação a 3400 rpm por 8 min. Em seguida, o extrato foi transferido para um tubo de polipropileno de 15 mL contendo os sorventes C18 e PSA, além de sulfato de magnésio anidro. Foi realizada a agitação manual e centrifugação, o extrato foi filtrado e analisado por GC-(TQ)MS/MS. O método foi validado fortificando a amostra branco em três níveis de concentração (10, 25 e 50 Ug kg-1) obtendo valores de recuperação entre 70,1 e 120,0% para 36 dos 40 disruptores endócrinos avaliados. Valores de RSD inferiores a 20% garantiram a boa precisão do método. A linearidade foi avaliada utilizando o coeficiente de determinação (r2) sendo este maior que 0,996 para todos os compostos. O efeito matriz foi avaliado, o qual foi bastante intenso para a maioria dos compostos, com valores superiores a 10%. O efeito matriz foi compensado utilizando-se curvas analíticas preparadas no extrato branco da matriz. A aplicação do método foi realizada em 6 amostras de filé de peixe de diferentes espécies, nas quais resíduos de bisfenol A, clorpirifós etílico e bifentrina foram encontrados. O método QuEChERS modificado proposto para a determinação de disruptores endócrinos em filé de peixe utilizando GC-(TQ)MS/MS mostrou ser eficaz, podendo ser aplicado em análise de rotina.
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Martins, Talita. "Caracterização mineralógica e da matéria orgânica do solo por técnicas espectroscópicas e DRX." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2009. http://tede2.uepg.br/jspui/handle/prefix/2071.
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Previous issue date: 2009-04-07Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Organic matter is the main agent present in the soil due to some of its actions, for example: responsible by source of nutrient for the plants, avoid erosive process, improve the aggregates stability, and act as a drain to atmospheric CO2, among others. Therefore, there are same management practice to enforce an increase in the percentage of soil organic matter, increasing the soil quality and the fertility. Among the management systems uses, being conservation management system that increase or keep the same rate of organic matter mainly on the surface, and Conventional Management that use a high rotation and cleanup the soil. In this work were used samples of Distrofic Red Latossol from Ponta Grossa – PR region, at different management systems: Conventional Tillage (CT), Reduced Tillage (RT) and No-Tillage (NT) at 0-5, 5-10, 10-15 and 15-20 cm of depth. Beyond the samples without any treatment (whole soil) it was analyzed parts obtained by granulometric physical fraction according: smaller than 2 μm (clay), between 2-20 μm (silt) and between 20-1000 μm (sand). All the samples were analyzed by X-ray fluorescent (XRF) and Fourier transform infrared (FTIR) and X-ray diffraction. It was determined eleven different mineral in the samples: Cau, Ha, Mt, Gb, Ve, An, Gt, Qz, He, Mag ant Rt. In relation to management systems and depth were not find qualitative different at the minerals. Humification indexes was determined in the soil organic matter by laser induced fluorescent (LIF) and the C/N ratio. CT samples showed larger humification and lower C/N ratio than others systems. In the other hand, NT collected between 0-5 cm depths showed larger percentage of C and lower humification than others systems. Sand fraction showed larger humification than other fractions soil studied. All cases presented lower humification in the superficial samples (0-5 cm depth). NT samples showed more favorable for organic matters accumulated, it was observed due to the difficult to separate the sand fraction from the others fractions by the granulometric physical fraction.
A matéria orgânica é o principal agente constituinte do solo, por ser responsável pela disponibilidade de nutrientes para as plantas, evitar processos erosivos, aumentar a estabilidade dos agregados, agir como um dreno do CO2 atmosférico, entre outras. Portanto, existe uma preocupação em adotar práticas de manejo que favoreçam maiores aportes de matéria orgânica do solo (MOS) e consequentemente aumentando sua qualidade e fertilidade. Entre os sistemas de manejo adotados, estão os sistemas conservacionistas que mantém ou aumentam as taxas de matéria orgânica principalmente na superfície e o plantio convencional que utiliza intenso revolvimento e limpeza do solo. Utilizou-se amostras de Latossolo Vermelho distrófico da região de Ponta Grossa, PR (Campos Gerais) em diferentes sistemas de manejo: plantio direto (PD), plantio convencional (PC) e preparo mínimo (PM) com profundidades 0-5, 5-10, 10-15 e 15-20 cm. Além das amostras de solo inteiro (sem nenhum tratamento físico ou químico) analisou-se também as suas frações obtidas através de fracionamento físico granulométrico: < 2 μm (argila), 2-20 μm (silte) e 20-1000 μm (areia). As amostras de solo inteiro e suas frações foram analisadas mineralogicamente utilizando a espectroscopia de Fluorescência de Raios X (FRX) e Infravermelho com transformada de Fourier (FTIR), além da Difração de Raios X (DRX). Foram determinados onze minerais nas amostras de solo inteiro, Cau, Ha, Mt, Gb, Ve, An, Gt, Qz, He, Mag e Rt. Em relação aos sistemas de manejo e profundidades não foram observadas diferenças qualitativas nos minerais. Para determinar o grau de humificação da MOS utilizou-se a espectroscopia de Fluorescência Induzida por Laser (FIL) e a razão C/N. No geral as amostras de solo inteiro sob PC apresentaram os maiores índices de humificação e menores razões C/N indicando maior humificação em comparação com os demais sistemas de manejo. Em contrapartida, as amostras sob PD e profundidade 0-5 cm foram as que apresentaram maior teor de C e menor grau de humificação. Para as frações do solo, a fração areia apresentou-se como a mais humificada e a fração argila menos humificada. Em todos os casos, as amostras de profundidades menores (0-5 cm) apresentaram menores índices de humificação. O PD mostrou-se favorável à acumulação de matéria orgânica, aumentando a estabilidade dos agregados, fato observado pela maior dificuldade em separar a fração argila das demais frações através do fracionamento físico granulométrico.
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Nova, Cristiane Carvalho da. "L'histoire en transe : le temps et l'histoire dans l'oeuvre de Glauber Rocha." Paris 3, 2003. http://www.theses.fr/2003PA030121.
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Tsampa, Anatoli. "Wort Ton Bild Welt." Doctoral thesis, Humboldt-Universität zu Berlin, 2017. http://dx.doi.org/10.18452/18053.
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Die Dissertation untersucht die Entwicklung des Gesamtkunstwerk-Konzeptes und seine Aktualität, Möglichkeit und Notwendigkeit in Bezug auf ein modernes filmisches Gesamtkunstwerk. Ausgegangen wird von der ästhetischen Theorie und Praxis der deutschen Frühromantik, in der das Konzept wurzelt. In einer umfassenden Betrachtung und Analyse der ästhetischen und gesellschaftspolitischen Dimension des Konzeptes in den Schriften und dem Werk Richard Wagners sollen wesentliche Strukturmerkmale erkundet und soll ein Maßstab für ein ‚positives‘ zeit-genössisches Gesamtkunstwerk gebildet werden, das sich von seinem ideologischen Missbrauch befreit. Erforscht wird, inwiefern der Farb- und Tonspielfilm ein geeignetes Kunstmedium für die Anwendung des Konzeptes darstellt und wie sich die Frage seiner gesellschaftspolitischen Dimension in der globalen Epoche übersetzen lässt.The dissertation explores the evolution of the concept of the Total Work of Art (ʹGesamtkunstwerkʹ) as well as its actuality, feasibility and necessity in the form of a modern cinematic Gesamtkunstwerk. Starting point is the aesthetic theory and praxis of the Early German Romanticism, in which the concept is rooted. An extensive consideration and analysis of the concept in both its aesthetic and socio-political dimension as developed in the writings and works of Richard Wagner aims to define its essential structural features and to set the standard for a ʹpositiveʹ contemporary Gesamtkunstwerk beyond its ideological abuse. Key is the examination of how and to what extend the sound and colour feature film constitutes a legit artistic medium for the application of the concept as well as how its sociopolitical facet translates within the global era.
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Omena, Cristhiane Maria Bazílio de. "Reflexos da utilização de farelo de coco na alimentação de tilápia do nilo (Oreochromis niloticus Linnaeus, 1857) sobre o valor nutricional do filé." Universidade Federal de Alagoas, 2008. http://repositorio.ufal.br/handle/riufal/1068.
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The fish diet exerts a great influence on its centesimal composition as well as
the content of cholesterol and fatty acids. The use of coconut meal may
represent alternative source in the fish diet in view of the cost and the
availability in the Northeast of Brazil. The purpose of this work was to assess
the impact of the use of coconut meal in feed for Nile tilapia (Oreochromis
niloticus Linnaeus, 1857) on the nutritional value of fillet. 120 fingerlings of
fish reversed were used, distributed in 20 boxes of polyethylene, containing 6
experimental units per boxe. The experiment was conducted in a completly
randomized design with 4 treatments (T1 - 0%, T2 - 10%, T3 - 20% and T4 -
30% for the inclusion of coconut meal) and with five repetitions. After 90
days, the fish were slaughtered and the fillet was removed and the proximate
composition, cholesterol and fatty acids were determined. There was a
difference (p<0,05) between treatment T1 and T3, T2 and T3 with regard to
levels of moisture; T2 and T3 to lipids; T1 to other treatments to
carbohydrates and between T1 and T2, T3 and T4 to ash. The level of
cholesterol showed a significant gradual increase following the increase in
the inclusion of coconut meal. With regard to fatty acids, there was difference
(p<0,05) between treatments regarding fatty acids: C10:0; C12:0; C14:0;
C18:1; C18:3 (gama); C20:3 and C22:6 in a ratio such that not determine
difference in the nutritional quality of the product. The values obtained
suggest the differences between the levels of inclusion of coconut meal in
feed had no effect on the nutritional quality of the fish, assuming that it did
not exceed the values established and recommended by the healths
institutions.Conselho Nacional de Desenvolvimento Científico e Tecnológico
A dieta alimentar de peixes exerce uma grande influência sobre a sua composição centesimal assim como no teor de colesterol e ácidos graxos. O uso do farelo de coco pode representar uma fonte alternativa na alimentação de peixes, tendo em vista o custo e sua disponibilidade na região Nordeste do Brasil. O objetivo deste trabalho foi avaliar os reflexos da utilização de farelo de coco na alimentação de tilápia do Nilo (Oreochromis niloticus Linnaeus, 1857) sobre o valor nutricional do filé. Foram utilizados 120 alevinos revertidos de tilápia do Nilo, distribuídos em 20 caixas de polietileno contendo 6 unidades experimentais por caixa. O experimento foi realizado em um delineamento inteiramente casualisado com 4 tratamentos (T1 - 0%, T2 - 10%, T3 - 20% e T4 - 30% de inclusão de farelo de coco) e com cinco repetições. Ao final de 90 dias, os peixes foram abatidos e retirados os filés dos quais foram determinados a composição centesimal, o colesterol e os ácidos graxos. Observou-se diferença (p<0,05) entre T1 e T3, T2 e T3 para os teores de umidade; entre T2 e T3 para os teores de lipídeos; T1 apresentou diferença com relação aos demais tratamentos no referente aos teores de carboidratos e no que diz respeito aos teores de cinzas foi observada diferença de T1 e T2 entre T3 e T4. Os teores de colesterol apresentaram um aumento gradual significativo acompanhando o aumento da inclusão do farelo de coco. Com relação aos ácidos graxos, observou-se diferença (p<0,05) entre os tratamentos referente aos ácidos graxos: C 10:0; C 12:0; C 14:0; C 18:1; C 18:3 (gama); C 20:3 e C 22:6 numa proporção tal que não determinou diferença na qualidade nutricional do produto. Os valores obtidos permitem concluir que as diferenças entre os níveis de inclusão de farelo de coco nas rações não interferiu na qualidade nutricional do pescado, admitindo-se que os mesmos não ultrapassam os valores estabelecidos e recomendados pelas instituições de saúde.
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Givors, Martin. "La compagnie de Fractus V (Eastman / Sidi Larbi Cherkaoui) comme foyer de régénération pour les interprètes : récit écologique et micropolitique d'un travail de terrain mené au fil de la création et de la tournée d’une création chorégraphique (2015-2018)." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAL004/document.
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Cette recherche s’élabore depuis un travail de terrain mené avec les artistes du spectacle Fractus V (Cie Eastman / choré. Sidi Larbi Cherkaoui) entre juin 2015 et mai 2018. Au fil du récit de cette traversée, de Barcelone à Anvers puis sur les routes d’Europe, une réflexion s’articule progressivement autour de l’interrogation suivante : dans quelle mesure le processus de création et la tournée du spectacle constituent-ils des expériences régénératrices pour les interprètes qui s’y engagent ? Rite de passage à bien des titres, Fractus V repose sur un désir de renouvellement et d’entre’fertilisation (« cross-fertilization ») partagé par neuf interprètes de cultures chorégraphiques et musicales différentes : les danseurs Sidi Larbi Cherkaoui, Dimitri Jourde, Johnny Lloyd, Fabian Thomé Duten et Patrick ‘Twoface’ Williams Seebacher ; les musiciens Soumik Datta, Kaspy N’Dia, Woojae Park et Shogo Yoshii. Leur modus operandi consiste d’abord en deux gestes : les interprètes s’apprennent les uns les autres des danses et s’essaient ensemble à des écritures collectives. Non sans difficultés, la compagnie naissante esquisse peu à peu les contours d’une micropolitique de création embrassant la nécessité de la fabrique d’un commun tout autant que l’inévitable processus de différenciation des interprètes entre eux. Comment les corps parviennent-ils à diffracter les apprentissages ? À faire « à leur manière » sans faire séparément ? À former une compagnie, voire un chœur polyphonique, plutôt qu’un assemblage d’altérités ? C’est à l’étude des pistes de réponse travaillées par les artistes, ainsi qu’à leurs évolutions dans le temps, que se dédie cette thèse. À cette fin, elle élabore une approche ethnographique, écologique et micropolitique des trajectoires et transformations des interprètes en mobilisant les anthropologies des lignes et des modes de Tim Ingold et de François Laplantine, les micropolitiques affectives de Brian Massumi et de Frédéric Lordon, la philosophie ontogénétique de Gilbert Simondon, ainsi que les études poïétiques en danse contemporaine. C’est aux côtés de cette assemblée d’artistes et de penseurs que se formule, au gré de récits et de réflexions théoriques, une pensée de la régénération comme principe d’une micropolitique écologique de l’être en devenir à l’œuvre au sein d’un processus de création chorégraphique collaboratifThis research developed from fieldwork conducted with the performers of the choreographic worked entitled “Fractus V” by the Eastman/Sidi Larbi company between June 2015 and May 2018. The narrative that unfolds from this fieldwork between Barcelona and Antwerp and thereafter along many roads of Europe revolves around the following questions: To what extent does the choreographic process and the tour of the performance constitute regenerative experiences for the performers involved? How are rites of passage understood? “Fractus V” is motivated by a choreographer’s desire for a renewal and cross-fertilizations shared by nine performers of different choreographic and musical cultures. The dancers include Sidi Larbi, Dimitri Jourde, Johnny Lloyd, Fabian Thomé Duten and Patrick ' Twoface ' Williams Seebacher; and musicians Soumik Datta, Kaspy N’Dia, Woojae Park and Shogo Yoshii. Their modus operandi is twofold: the performers learn each others’ dances and then try together to devise collectively. Not without difficulties, the nascent company gradually sketches out the contours of a creative policy embracing the necessity of “commoning” and differentiation. The thesis asks how do you create a polyphonic company respecting one’s idiosyncratic way of moving while not merely creating an assemblage of difference amongst each other? This thesis includes interviews conducted with the performers, as they evolve over the duration of rehearsals and touring. To this end, it develops an ethnographic, ecological and micropolitical approach analyzing the trajectories and transformations of the performers with Tim Ingold’s and François Laplantine’s anthropological approaches, the philosophy of affect of Brian Massumi and Frédéric Lordon, the ontogenetic philosophy of Gilbert Simondon, as well as the poetic studies in contemporary dance. The combination of the “Fractus V” fieldwork and the theoretical discourse mentioned above both contribute to the notion that the regenerative underpins the performer’s ecological approach of becoming through and with collaborative choreographic devising
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Benoît, Lionel. "Positionnement GPS précis et en temps-réel dans le contexte de réseaux de capteurs sans fil type Geocube : application à des objets géophysiques de taille kilométrique." Thesis, Paris, Ecole normale supérieure, 2014. http://www.theses.fr/2014ENSU0014/document.
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Les réseaux de capteurs permettent une surveillance multi-paramètres de zones d'étendue limitée grâce à la coopération d'un ensemble de récepteurs déployés in-situ qui gèrent l'acquisition, le traitement et le transfert de données. Afin de coupler le concept de réseaux de capteurs et un positionnement précis des récepteurs à l'aide de puces GPS mono-fréquence, l'Institut National de l'Information Géographique et Forestière (IGN) a mis au point le Geocube.La première partie de ce travail a été consacrée au développement d'une stratégie d'acquisition, de transfert et de traitement des données GPS des Geocubes pour permettre un positionnement précis et en temps-réel des récepteurs au sein du réseau. Un traitement utilisant les observations de phase GPS ainsi qu'un filtrage de Kalman a été adopté. Cependant, les séries temporelles de positions brutes sont entachées de l'effet des multitrajets. Diverses méthodes d'atténuation de ce phénomène sont alors proposées. Au final, une précision infra-centimétrique à millimétrique est atteinte.La seconde partie de cette thèse a été consacrée à l'application de réseaux de Geocubes pour l'étude d'objets géophysiques. Deux sites d'étude ont été sélectionnés: le glissement de terrain de Super-Sauze dans la vallée de l'Ubaye et le glacier d'Argentière dans le massif du Mont-Blanc. La dynamique des objets d'intérêt peut alors être étudiée à une échelle infra-journalière grâce à la précision et à la grande résolution temporelle du positionnement des Geocubes. De plus, la densité des réseaux de mesure et leur facilité d'installation permet d'instrumenter la grande majorité des points où un besoin de surveillance est identifiéWireless Sensor Networks (WSN) allow a multi-parameters monitoring of small extend areas thanks to cooperative data acquisition, transfer and processing. In order to combine WSN with a precise positioning of the receivers within the network using single frequency GPS modules, the Geocube has been developed by the French National Institute of Geographic and Forest Information (IGN-France). The first part of this work focused on GPS data management and processing to allow the relative positioning of the Geocubes within a local network. To this end, a processing method customized for Geocube data and WSN environment was developed. It is based on the use of GPS carrier phase double differences and a Kalman filtering. Due to the basic GPS antenna used into the Geocube to minimize its price and its size, multipath affect position time series. Various strategies are proposed for multipath mitigation, and finally a sub-centimeter to millimeter level accuracy is reached for relative positioning depending on measurement conditions.The second part of this work was devoted to the use of Geocube networks for geophysical structures monitoring. Two test sites were selected: the Super-Sauze landslide (Ubaye valley, Alpes de Haute-Provence, France) and the Argentière glacier (Mont-Blanc massif, Haute-Savoie, France). The dynamics of the studied areas was investigated at a sub-daily time scale thanks to the high accuracy and the high time resolution of positioning time series derived from Geocubes. In addition, positioning data were acquired quite everywhere a deformation measurement was needed thanks to the low-cost of Geocubes and their easy set up
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Bonometo, Vanessa Elvira. "Estudo da humificação da matéria orgânica de um cambissolo em diferentes sistemas de manejo por meio de técnicas espectroscópicas." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2010. http://tede2.uepg.br/jspui/handle/prefix/886.
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Previous issue date: 2010-06-22Stocks and stability of soil organic matter (SOM), even accounting approximately 5% of soil total, are indicators of quality and sustainability of the management system to which the soil is submitted, it has influence on nutrient availability for plants, assists in erosion retention, increases aggregates stability and assists in carbon sequestration. As labile SOM becomes stable through the humification process, affected by climate, soil type and management systems, the molecular structures gain complexity resulting in the formation of groups such as fluorescent aromatic rings and quinines, which can be evaluated by spectroscopy techniques. The purpose of this research was to use spectroscopic techniques to measure the humification of organic matter in a Cambisol, which comes from Irati – PR, submitted to two management systems: conventional tillage and no-tillage (six years and nine years). The forest was used as comparison. Analysis were performed using laser induced fluorescence (LIF) in whole soil (no chemical or physical treatment), and fractions obtained by physical fractionation by granulometry: (clay), (silt) e (fine sand) e (sand). The samples were also analyzed for fluorescence of humic acids, obtained by chemical fractionation of soil and absorption spectroscopy, UV-Visible ( ratio). The results of these tests show no difference in the degree of humification of SOM between management systems.
Os estoques e a estabilidade da matéria orgânica do solo (MOS), mesmo representando cerca de 5% do total do solo, são indicadores da qualidade e da sustentabilidade do sistema de manejo ao qual o solo está submetido, pois tem influência na disponibilidade de nutrientes para as plantas, auxilia na retenção de processos erosivos, aumenta a estabilidade de agregados e auxilia no sequestro de carbono. À medida que a MOS lábil torna-se estável por meio do processo de humificação, afetado pelo clima, tipo de solo e sistemas de manejo, as estruturas moleculares ganham complexidade, resultando na formação de grupos fluorescentes como anéis aromáticos e quinonas, que podem ser avaliados por técnicas espectroscópicas. O objetivo desta pesquisa foi utilizar técnicas espectroscópicas para medir a humificação da matéria orgânica de um Cambissolo Háplico, proveniente do município de Irati – PR, submetidos a dois sistemas de manejo: plantio convencional e plantio direto (de seis e de nove anos). Foi utilizada a mata para comparação. Foram realizadas análises de fluorescência induzida a laser (FIL) nas amostras de solo inteiro (sem nenhum tratamento físico ou químico) e das suas fracões obtidas através de fracionamento físico granulométrico: (argila), (silte) e (areia fina) e (areia grossa). Também foram realizadas análises de fluorescência dos ácidos húmicos, obtidos por meio de fracionamento químico do solo, e espectroscopia de absorção de UV-Visível (razão ). Os resultados desta análise mostram que não houve diferença no grau de humificação da MOS entre os sistemas de manejo.
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Song, Ye-Qiong. "Étude de performances de FIP : aide au dimensionnement d'applications." Vandoeuvre-les-Nancy, INPL, 1991. http://docnum.univ-lorraine.fr/public/INPL_T_1991_SONG_Y_Q.pdf.
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Ce travail est une contribution à l'évaluation des performances du bus de terrain FIP (Factory Instrumentation Protocol). A partir d'une analyse des architectures de systèmes automatisés, nous montrons le besoin de communications à temps critique et non critique entre des équipements qui se trouvent connectés à un tel réseau. Ensuite, le protocole FIP est présenté comme une solution adaptée, encore faut-il que l'évaluation des performances d'un tel protocole le prouve. Notre étude s'est concentrée sur la couche liaison de données de FIP en utilisant deux moyens : l'étude analytique et la simulation. Pour étudier analytiquement le bus FIP, les services offerts par sa couche liaison de données sont modélisés par un système de files d'attente composé de deux étages parallèle-série avec des serveurs intermittents. Une méthode d'approximation originale est développée afin que ce modèle puisse être étudié en utilisant la théorie des files d'attente. La pertinence des résultats analytiques est mise en évidence par la simulation. Parallèlement à l'étude analytique, un simulateur appelé SimulFIP, qui décrit la couche liaison de données de FIP en langage de simulation QNAP2, a été développé. Il est capable de simuler un bus FIP de configuration quelconque. A l'issue d'une telle simulation, la paramétrisation optimale du réseau à installerThis work is a contribution to the performance evaluation of the field bus FIP (Factory Instrumentation Protocol). Through an analysis of the industrial process control systems architectures, we show the need of the time critical and non-critical communications among the devices connected to such network. Then, the FIP protocol is presented as an adapted solution, and the performance evaluation of such a protocol appears necessary. Our study is focused on the data link layer of FIP by using two approaches : analytic study and simulation. For the analytic study, the services of the data link layer of FIP are modelied by a queueing system made of two stages in “parallel-series” with the intermittent servers. An original approximate method was made so that this model can be studied by using the queueing theory. In parallel with the analytic study, a simulator called “SimulFIP”, which describes the date link layer of FIP in the simulation langage QNAP2, has been bevelopped. It is able to simulate a FIP field bus of whatever configuration. The results obtained from such a simulation can be used to achieve the optimal parameterization of the network to be installated
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Silva, Rogério Matias Vidal da. "Simulador para estudo avançado da distribuição da dose em bexiga durante procedimentos de braquiterapia ginecológica." Universidade Federal de Sergipe, 2015. https://ri.ufs.br/handle/riufs/5237.
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Considering the difficulties related to determination the dose delivered on the bladder during procedures of gynecological brachytherapy of high dose rate, this study presents a prototype of a dynamic simulator (phantom) suitable for experimental dosimetry of these organs during this type of procedure. In order to evaluate the phantom´s ability to simulate real clinical situations, a dosimetric study was conducted using radiochromic film and optically stimulated luminescence dosimeters (OSLDs). The phantom was constructed of polymethyl methacrylate (PMMA) and ácido polilático (PLA). Artificial bladders were printed in three dimensions, from computed tomography images (CT) of real patients with brachytherapy applicators already positioned. In the phantom, the artificial bladder can move in all directions. The films and OSLDs were placed on the artificial bladder walls and the applicators were placed according to the original CT image. The prototype phantom simulated the behavior of dose on the surface of each printed bladder. The dosimetric study showed agreement in most cases, with the results obtained from a computerized planning system. In this sense, the methodology presented in this study provides conditions for experimental investigations on the behavior of dose on the surface of the bladder due procedures of intracavitary brachytherapy of cervix.Considerando as dificuldades relacionadas à determinação da dose experimentada pela bexiga urinária durante procedimentos de braquiterapia ginecológica de alta taxa de dose, este estudo apresenta um protótipo de um objeto simulador dinâmico (fantoma) apropriado para dosimetria experimental desse órgão nesses tipos de procedimentos. Com o intuito de avaliar a capacidade do fantoma em simular situações clínicas reais, um estudo dosimétrico foi realizado utilizando filme radiocrômico e dosímetros de luminescência opticamente estimulada (OSLDs). O fantoma foi construído de polimetilmetacrilato (PMMA) e ácido polilático (PLA). Bexigas artificiais foram impressas em três dimensões,a partir de imagens de tomografia computadorizada (TC) de pacientes reais com os aplicadores braquiterápicos já posicionados. No fantoma, após o posicionamento, uma bexiga artificial pode se mover em todas as direções. Os filmes e os OSLDs foram posicionados nas paredes das bexigas artificiais, e os aplicadores foram colocados de acordo com a imagem original TC. O fantoma protótipo simulou o comportamento da dose na superfície de cada bexiga impressa. Os estudos dosimétricos exibiram concordância, na maioria dos casos, com os resultados obtidos a partir de um sistema de planejamento computadorizado. Nesse sentido, a metodologia apresentada nesse estudo oferece condições para investigações experimentais sobre o comportamento da dose na superfície da bexiga devido procedimentos de braquiterapia intracavitária de colo do útero.
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Albuquerque, Daniel dos Santos. "DETERMINAÇÃO DE Cu²⁺ EM BIOCOMBUSTÍVEIS COM USO DE ELETRODO DE FILME DE BISMUTO, APÓS ELIMINAÇÃO DA INTERFERÊNCIA DO Bi³⁺." Universidade Federal do Maranhão, 2013. http://tedebc.ufma.br:8080/jspui/handle/tede/970.
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Previous issue date: 2013-06-03Despite the advantages of bismuth film electrode for the determination of trace metals and organic compounds, the Cu²⁺ is an element that has problems when measured with this electrode, since its potential is very close to the Bi³⁺, causing overlapping of peaks. This work presents an alternative to eliminate the interference of Bismuth in the determination of copper in using bismuth film electrodes (BiFE), prepared ex situ mode. The ethanol fuel samples without pre-treatment and biodiesel samples previously digested were used in order to evaluate this electroanalytical procedure. The optimization of the parameters was performed using a complete factorial design 2³ with center point. After several voltammetric experiments, optimal conditions for the determination of Cu²⁺ were the following: Edep = -1.3 V; tpre = 120s; Frequency: 60 Hertz. The voltammograms using anodic stripping voltammetry method in the square wave mode and their corresponding standard addition curves indicated that the bismuth film electrode provides a sensitive and useful procedure for the determination of Cu²⁺ in biofuels. Experiments carried out by the successive addition of aliquots of a standard solution of Cu²⁺, yielded a linear response of peak current to the concentration of metal ion. Good detection limits have been obtained for the determination of Cu²⁺ in ethanol fuel, soybean oil and tallow biodiesels respectively (4.9 x 10ˉ⁸ mol Lˉ¹; 5.60 x 10ˉ⁸ mol Lˉ¹, 1.79 x 10ˉ⁸ mol Lˉ¹). The accuracy was assessed through recovery test (recoveries of 85.6% to 97.05%) and the precision was expressed by the coefficient of variation that ranged from 10% to 18%. The method was successfully applied to two different samples of biodiesel and ethanol fuel and analyzed in triplicate.
Apesar das vantagens do Eletrodo de Filme de Bismuto (BiFE), na determinação de metais traços e compostos orgânicos, o Cu²⁺ é um elemento que apresenta problemas quando quantificado com este eletrodo, uma vez que seu potencial é muito próximo ao do Bi³⁺, causando a sobreposição de picos. Este trabalho apresenta uma alternativa para eliminação da interferência do bismuto na determinação de Cu²⁺ em biocombustíveis (etanol e biodiesel), usando um BiFE, preparado no modo ex situ. As amostras de etanol combustível foram usadas sem tratamento prévio, enquanto as amostras de biodiesel foram previamente digeridas. A otimização dos parâmetros foi realizada com o uso do planejamento fatorial completo 2³ com ponto central. Após vários experimentos voltamétricos, as condições ideais para a determinação de Cu²⁺ foram: Edep = -1,3 V; tpré = 120 s; Frequência: 60 Hertz. Os voltamogramas e suas correspondentes curvas de adição padrão indicaram que o uso do BiFE com a técnica Voltametria de Redissolução Anódica (ASV), no modo onda quadrada, indicaram que o procedimento é adequado, útil e sensível para a determinação de Cu²⁺ em biocombustíveis. Os experimentos realizados, pela adição sucessiva de alíquotas da solução padrão de Cu²⁺ proporcionaram uma resposta linear entre a corrente de pico e a concentração do íon metálico. Bons limites de detecção foram obtidos para a determinação do Cu²⁺ em Etanol combustível, biodiesel de óleo de soja e de sebo respectivamente (4,90x10ˉ⁸ mol Lˉ¹; 5,60x10ˉ⁸ mol Lˉ¹; 1,79x10ˉ⁸mol Lˉ¹). A exatidão foi avaliada através do teste de recuperação (recuperações de 85,6% a 97,05%). A precisão, expressa pelo coeficiente de variação (CV: entre 10% e 18%) foi considerada boa. O método foi aplicado com sucesso em amostras reais de biodiesel e Etanol combustível.
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Rigo, Reus Tiago. "S?ntese e caracteriza??o de membranas zeol?ticas tipo mfi e aplica??o em separa??o de arom?ticos." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17704.
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Previous issue date: 2013-07-22Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior
The synthesis of MFI-type zeolite membranes was carried by the process in situ or hydrothermal crystallization. We studied the homogenization time of the room temperature and gel filtration just before the crystallization step performed out in an oven, thus obtaining a more uniform zeolite film. The powder synthesized zeolite (structure type MFI, Silicalite) was characterized by several complementary techniques such as Xray diffraction (XRD), scanning electron microscopy (SEM), thermal analysis, temperature programmed desorption (TPD), Fourier Transform infrared spectroscopy (FTIR) and textural analysis by nitrogen adsorption (specific surface area). For the purpose of evaluating the quality of the layer supported on the ceramic support, N2 permeation tests were carried starting from room temperature to 600 ?C, where values were observed values more appropriate permeation from 200 ?C. With the data obtained, it was made into a graph of temperature versus permeation function, the curve of surface diffusion was found. For scanning electron microscopy, we observed the formation of homogeneous crystals and the zeolite film showed no fissures or cracks, indicating that the process of synthesis and subsequent treatments not damaged the zeolite layer on the support. Carried permeation studies were found values ranging from 3.64x10-6 to 3.78x10-6, 4.71x10-6 to 5.02x10-6, to pressures 20 and 25 psi, respectively. And the mixture xylenes/N2 values were between 5.39x10-6 to 5.67x10-6 and 8.13x10-6 to 8.36x10-6, also for pressures of 20 and 25 psi. The values found for the separation factor were 15.22 at 400 ?C in the first experiment and 1.64 for the second experiment at a temperature of 150 ?C. It is concluded that the Silicalite membrane was successfully synthesized and that it is effective in the separation of binary mixtures of xylenes
A s?ntese de membranas zeol?ticas do tipo MFI foi realizada pelo processo de cristaliza??o in situ ou hidrot?rmica. Foi estudado o tempo de homogeneiza??o do gel em temperatura ambiente e filtra??o do mesmo antes da etapa de cristaliza??o efetuada em estufa, obtendo-se um filme zeol?tico uniforme. O p? da ze?lita sintetizada (estrutura tipo MFI, Silicalita) foi caracterizado por diversas t?cnicas complementares, como: difra??o de raios X (DRX), microscopia eletr?nica de varredura (MEV), an?lise t?rmica, dessor??o a temperatura programada (TPD), infravermelho por transformada de Fourier (FTIR) e an?lise textural por adsor??o de nitrog?nio (?rea espec?fica). Com a finalidade de avaliar a qualidade da camada suportada sobre o suporte cer?mico, testes de permea??o com N2 foram efetuados partindo da temperatura ambiente at? 600 ?C, onde foram observados valores mais adequados de permea??o a partir dos 200 ?C. Com os dados obtidos confeccionou-se um gr?fico em fun??o da temperatura versus a permea??o, a curva encontrada foi de difus?o superficial. Por microscopia eletr?nica de varredura, observouse a forma??o de cristais homog?neos e que o filme zeol?tico n?o apresentava fissuras ou rachaduras, indicando que o processo de s?ntese e tratamentos posteriores n?o danificaram a camada de ze?lita sobre o suporte. Realizando estudos de permea??o foram verificados valores que variam entre 3,64x10-6 a 3,78x10-6 e 4,71x10-6 a 5,02x10-6, para press?es de 20 e 25 psi, respectivamente. Para a mistura xilenos/N2 os valores foram de 5,39x10-6 a 5,67x10-6 e 8,13x10-6 a 8,36x10-6, tamb?m para press?es de 20 e 25 psi. Os valores encontrados para o fator de separa??o foram de 15,22 em 400 ?C no primeiro experimento e 1, 64 para o segundo experimento em uma temperatura de 150 ?C. Conclui-se que a membrana Silicalita foi sintetizada com sucesso e que a mesma ? efetiva na separa??o de misturas bin?rias de xilenos
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Girard, Jean-Denis. "Système d'analyse de transferts thermiques." Grenoble INPG, 1989. http://www.theses.fr/1989INPG0132.
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A la place du rencherissement du cout de l'energie, une politique d'economie s'est mise en place. L'accent a notamment ete mis sur les deperditions des locaux. Il s'est alors avere qu'aucun materiel de mesure de terrain du coefficient de conduction thermique k n'existait. Une methode de mesure et un ensemble de materiels ont donc ete developpes. La methode proposee utilise une plaque chaude gardee realisee a partir d'un film chauffant. Un materiel specifique de commande permet de choisir la temperature de plaque chaude et de reguler l'ecart de temperature entre cette derniere et la garde. L'ensemble se complete d'une centrale autonome d'acquisition de donnees, utilisable pour d'autres applications; un boitier de sequencement permet de choisir la periode d'echantillonnage et un convertisseur parallele-serie permet d'utiliser la liaison rs232 des ordinateurs pour effectuer ulterieurement le traitement des donnees. Les tests de laboratoire et sur le terrain permettent de valider la methode et de verifier la fiabilite des materiels
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Rocha, Érico Maurício Santos. "LP2P: uma abordagem peer-to-peer para o compartilhamento de arquivos em redes locais." Universidade do Vale do Rio dos Sinos, 2011. http://www.repositorio.jesuita.org.br/handle/UNISINOS/3123.
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Nos últimos anos, o crescimento da Internet e o surgimento de novos serviços em rede contribuíram para o desenvolvimento de várias arquiteturas destinadas à computação distribuída. Neste contexto, a tecnologia P2P tem fomentado o interesse da comunidade científica em decorrência de suas características e funcionalidades inovadoras. Um dos fatores responsáveis por esta popularidade é proveniente das aplicações destinadas ao compartilhamento de arquivos. Este serviço também ocorre de forma expressiva em redes de menor abrangência (ex. LANs), onde recursos presentes nas estações de trabalho são muitas vezes desperdiçados enquanto as corporações investem maciçamente em infraestrutura específica para prover este serviço. Uma possível alternativa frente a este cenário, está na adaptação de alguns conceitos do paradigma P2P à infraestrutura de rede local. No entanto, há poucos esforços no sentido de explorar o potencial da comunicação peer-to-peer aliada aos padrões e vantagens disponíveis nas LANs. Em virtude de sua natureza distribuída, as abordagens P2P convencionais adotam este sistema principalmente em redes de longa distância (MANs e WANs) para formação da estrutura overlay. Contudo, estes aspectos não inviabilizam a utilização de algumas técnicas e características da tecnologia P2P em redes de menor abrangência. Este conjunto de fatores motivaram a proposta do LP2P-Local Peer-to-Peer-Protocol-, uma plataforma de comunicação distribuída e descentralizada que aplica a tecnologia P2P no compartilhamento de arquivos em redes locais.
In recent years, the growth of the Internet and the emergence of new network services contributed to the development of various architectures for distributed computing. In this context, P2P technology has fostered the interest of the scientific community due to its features and innovative characteristies. One of the factors responsible for this popularity is coming from consumer applications and file sharing. This service also occurs in a significant way into networks of smaller scope (e.g. LANs), where features present in the workstations are often wasted while corporations invest heavily in infrastructure to provide this particular service. A possible alternative in the face of this scenario is the adaptation of some concepts of P2P paradigm to the local network infrastructure. However, there are few efforts to explore the potential of communication peer-to-peer coupled with the patterns and advantages available in LANs. Due to its distributed nature, conventional P2P approaches adopted this system mainly in long distance (MANs and WANs) to overlay structure formation. However, these aspects do not make use of some techniques and features of P2P networks smaller. These factors motivated the proposal of LP2P-Local Peer-to-Peer-Protocol- a distributed communications platform that applies technology in P2P file sharing on local networks.
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Santos, José Antônio Duarte. "Crescimento e caracterização de filmes espessos de CdTe para a fabricação de detectores de raios-X." Universidade Federal de Viçosa, 2010. http://locus.ufv.br/handle/123456789/4240.
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Previous issue date: 2010-04-30Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
The presence of nuclear radiation detectors is extremily important in various industries such as medical, astronomy and of national security. There are many types of detectors. However, the detector constructed with CdTe and CdZnTe semiconductor films has become very popular due to some characteristics as convenience, density, energy resolution and for having the possibility of operating at room temperature. In this work, a review of nuclear radiation detectors is made, especially those built with semiconductor. Here are also presented structural, superficial and electric characterization methods to inform which type of sample is the most viable for such purpose. We also present in this work the results of the of CdTe films growth using HotWall Epitaxy technique (HWE) in temperatures from 150 C and 250 C over Si (111), simple glass and glass covered with tin oxide with fluorine . It is also presented the results ofcharacterization of CdTe films by x-ray diffraction and electrical characterization by curves I x V.
A presença de detectores de radiação nuclear é de extrema importância em várias indústrias como, por exemplo, a médica, a astronômica e de segurança nacional. Existem inúmeros tipos de detectores. Um deles, o detector construído com ligas semicondutoras de CdTe e CdZnTe, tem se tornado bastante popular devido às características peculiares como: praticidade, densidade, resolução energética e pela possibilidade de operarem a temperatura ambiente. Neste trabalho, faremos uma revisão de detectores de radiação nuclear, especialmente dos construídos com semicondutores. Apresentamos também métodos de caracterização estrutural, superficial e elétrica de amostras a fim de informar qual tipo de amostra é a mais viável para tal finalidade. Mostramos os resultados do crescimento de filmes espessos de CdTe, utilizando a técnica de Epitaxia de Paredes Quentes (HWE) nas temperaturas de 150 C e 250 C sobre Si (111), vidro simples e vidro coberto com óxido de estanho dopado com flúor. São também apresentados os resultados de caracterização dos filmes de CdTe por difração de raios-X e caracterização elétrica através de curvas I x V do filme.
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Cordeiro, Diéricon Sousa. "Efeitos das interações inter e intramoleculares na fotofísica e morfologia de filmes finos de derivados de carbazol." Universidade Federal de Goiás, 2018. http://repositorio.bc.ufg.br/tede/handle/tede/8221.
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Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq
Photoluminescent, electroluminescent and photoconductive materials find a wide range of scientific and technological applications, therefore, the accurate photophysics properties description is indispensable. To apply carbazole derivatives as active layers in photovoltaic devices, the steady-state and time-resolved fluorescence spectroscopy of 9-vinylcarbazole (9VCz) and its respective polymer, Poly (N-vinylcarbazole) (PVCz) in solution and thin films prepared by distinct techniques were carried out in this work. Layer-by-Layer by self-assembling and by spin-coating thin films were prepared in order to compare the effects of the distinct techniques on the final photophysics. They also had their morphology characterized by distinct techniques of microscopy. The spectroscopic fluorescence showed that the ideal solutions for producing the thin films were those at concentrations of 10-4 mol L-1 and 10-5 g L-1 for molecule and polymer, respectively. Thin films of the molecule prepared by the self-assembling technique showed structured bands, however, for the polymer, we observed that the spin-coating technique resulted in a film with less aggregation and structured spectra, thus, well defined vibrational bands could be observed. In addition, it was observed that the fluorescence intensity decreases as the number of layer deposition increases in the 9VCz thin films, however, in the self-assembling tri-layer PVCz film, spectra with higher intensity were recorded. Microscopy indicates the formation of thin films; however, it is possible to observe the formation of aggregates on the surface of the thin films, which are also evidenced by steady-state fluorescence.
Materiais com propriedades fotoluminescentes, eletroluminescentes e fotocondutoras encontram aplicações científicas e tecnológicas bastante diversas, para isso, é indispensável executar o estudo detalhado da fotofísica dos materiais de interesse. Com o objetivo de aplicar derivados de carbazol como camada ativa em dispositivos fotovoltaicos, o estudo de espectroscopia de fluorescência fotoestacionária e com resolução temporal do 9-vinilcarbazol (9VCz) e seu respectivo polímero o Poli(N-vinilcarbazol) (PVCz) foi realizado nesse trabalho, quando em solução e quando na forma de filmes finos produzidos por métodos distintos: Layer-by-Layer por automontagem e por spin-coating, afim de comparar o efeito na fotofísica das técnicas de confecção de filmes finos, que também tiveram sua morfologia caracterizada por distintas técnicas de microscopia. Os resultados espectroscópicos das soluções evidenciaram as soluções 10-4 mol L-1 e 10-5 g L-1 para a molécula e para o polímero, respectivamente, como as soluções ideais para produção dos filmes finos. Os filmes finos preparados pela técnica de automontagem apresentaram bandas estruturadas para a molécula, no entanto para o polímero, observou-se que a técnica por spin-coating apresenta menor agregação e espectros mais estruturados, com isso, bandas vibracionais melhor definidas foram visualizadas. Além disso, notou-se que a intensidade de fluorescência apresentou uma diminuição à medida que se aumenta o número de camadas depositadas umas sobre as outras na produção dos filmes finos do 9VCz, no entanto, no filme de PVCz em tricamada, obtido por automontagem a fluorescência tem maior intensidade. A morfologia registrada indica a formação de filmes finos, porém, é possível observar a formação de agregados na superfície dos filmes finos, agregação essa que também é evidenciada pelos dados de espectroscopia de fluorescência fotoestacionária e resolvida no tempo.
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Ara?jo, Ana Karollina Gomes de. "Caracteriza??o magn?tica e estrutural de filmes depositados por gaiola cat?dica." Universidade Federal do Rio Grande do Norte, 2014. http://repositorio.ufrn.br:8080/jspui/handle/123456789/16655.
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Previous issue date: 2014-07-25Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior
Iron nitrite films, with hundred of nanometers thick, were deposited using the Cathodic cage plasma nitriding method, with a N2/H2 plasma, over a common glass substract. The structure, surface morphology and magnetic properties were investigated using X-ray diffractometry (XRD), atomic force microscopy (AFM) and vibrating sample magnetometer (VSM). XRD shows the formation of γ FeN phase and a combination of ζFe2N + ɛFe3N phases. The film s saturation magnetization and coercivity depends on morphology, composition, grain size and treatment temperature. Temperature raising from 250 ?C to 350 ?C were followed by an increase in saturation magnetization and film s surface coercivity on the parallel direction in relative proportion. This fact can be attributed to the grain sizes and to the different phases formed, since iron rich fases, like the ɛFe3N phase, emerges more frequently on more elevated treatment s temperature. Using this new and reasonably low cost method, it was possible to deposit films with both good adhesion and good magnetic properties, with wide application in magnetic devices
Filmes de nitreto de ferro, com centenas de nanometros de espessura foram depositados pelo m?todo de deposi??o/nitreta??o por Gaiola Cat?dica utilizando um plasma de N2/H2 sobre um substrato de vidro comum. A estrutura, morfologia da superf?cie e propriedades magn?ticas foram investigadas com o uso de Difratometria de Raio-X (DRX), Microscopia de For?a At?mica (MFA) e Magnet?metro de Amostra Vibrante (MAV). A DRX exibe a forma??o da fase γ FeN e mistura de fases ζFe2N + ɛFe3N. A magnetiza??o de satura??o e coercividade dos filmes de nitreto de ferro dependem da morfologia, composi??o, tamanho de gr?o e temperatura de tratamento. Com o aumento da temperatura de 250 para 350 ?C, a magnetiza??o de satura??o e a coercividade na dire??o paralela ? superf?cie dos filmes tamb?m aumentam em propor??o relativa. Isto pode ser atribu?do aos tamanhos de gr?os e ?s diferentes fases formadas, j? que fases ricas em ferro como ɛFe3N surgem com frequ?ncia maior em temperaturas de tratamento mais elevadas. Neste estudo foi poss?vel a deposi??o de filmes de boa ades?o e boas propriedades magn?ticas com grande aplica??o em dispositivos magn?ticos por um m?todo novo e de baixo custo
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HELIAS, VALERIE. "Mise au point d'outils de caracterisation et de detection d'erwinia carotovora subsp. Atroseptica agent de la jambe noire et de la pourriture molle de pomme de terre. Application a l'etude de la transmission de la bacterie, via la plante, du tubercule mere vers les tubercules fils en cours de culture." Rennes, Agrocampus Ouest, 1999. http://www.theses.fr/1999NSARB106.
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Le tubercule de semence est une source importante d'inoculum pour la contamination des tubercules fils de pomme de terre par les erwinia pectinolytiques. Cependant, processus et cinetique de contamination des differents organes de la plante, y compris les tubercules fils, sont meconnus faute d'une detection efficace de la bacterie au sein de la plante tout au long de la culture. Les objectifs de ce travail etaient donc de mettre au point des outils de detection fiables, sensibles, rapides et specifiques d'erwinia carotovora subsp. Atroseptica, sous espece la plus prejudiciable en climats temperes, et de les appliquer a l'etude de la transmission de la bacterie du tubercule mere vers les tubercules fils en cours de culture. Les ameliorations apportees aux techniques de detection par pcr (validation d'amorces specifiques et d'un systeme de revelation colorimetrique) ou par serologie (das elisa avec une etape d'enrichissement) ont permis de leur conferer les qualites requises pour leur utilisation a un suivi epidemiologique. Le suivi de la colonisation des differents organes au champ a montre que les organes sains issus de plantes asymptomatiques sont moins contamines que ceux issus de plantes symptomatiques. Les stolons sont precocement et plus frequemment contamines que les tiges et tubercules fils, independamment de l'etat de la plante. Les bacteries sont detectees 10-15 cm au dela des lesions visibles sur les tiges, mais la contamination est plus frequente chez bintje que chez desiree. Les taux de contaminations latentes similaires des tubercules des deux cultivars a la recolte ne se traduisent pas par un comportement identique en vegetation, bintje exprimant plus de symptomes que desiree. De meme, la descendance de bintje presente plus frequemment des symptomes visibles que celle de desiree. Les pertes de rendement, variant selon les types de symptomes et les dates de notation, justifient la distinction des differentes manifestations symptomatologiques de la maladie.
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Reyburn, Duncan. "Chestertonian dramatology." Thesis, University of Pretoria, 2012. http://hdl.handle.net/2263/30301.
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This study proposes an answer to the question of what the contemporary relevance of the writings of GK Chesterton (1874-1936) may be to the field of visual culture studies in general and to discourse on visual hermeneutics in particular. It contends that Chesterton’s distinctive hermeneutic strategy is dramatology: an approach rooted in the idea that being, which is disclosed to itself via language, has a dramatic, storied structure. It is this dramatology that acts as an answer to any philosophical outlook that would seek to de-dramatise the hermeneutic experience. The structure of Chesterton’s dramatology is unpacked via three clear questions, namely the question of what philosophical foundation describes his horizon of understanding, the question of what the task or goal of his interpretive process is and, finally, the question of what tools or elements shape his hermeneutic outlook. The first question is answered via an examination of his cosmology, epistemology and ontology; the second question is answered by the proposal that Chesterton’s chief aim is to uphold human dignity through his defenses of the common man, common sense and democracy; and the third question is answered through a discussion of the three principles that underpin his rhetoric, namely analogy, paradox and defamiliarisation. After proposing the structure of Chesterton’s dramatology via these considerations, the study offers one application of this dramatology to Terrence Malick’s film 'The tree of life' (2011). This is sustained in terms of the incarnational paradox between mystery and revelation that acts as the primary tension and hermeneutic key in Chesterton’s work.Thesis (PhD)--University of Pretoria, 2012.
Visual Arts
unrestricted
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Motta, Maycon. "Avalanches de fluxo em filmes finos supercondutores estruturados : suscetibilidade ac, morfologia e outros estudos." Universidade Federal de São Carlos, 2013. https://repositorio.ufscar.br/handle/ufscar/4961.
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Previous issue date: 2013-04-12Universidade Federal de Minas Gerais
Avalanches are sudden dramatic phenomena that occur in nature. The technique of magneto-optical imaging (MOI) has allowed us to observe abrupt flux entrances in superconductors, the so-called ux avalanches, due to thermomagnetic instabilities in the vortex matter. Their morphology is fascinating, especially in superconducting thin films, where they develop in dendritic patterns. From a practical point of view, the flux avalanches undermine applications of superconducting thin films. In the last years, however, several steps have been reached to fully understand the fundamental physics of the phenomenon and also on how to suppress their occurrence. The present thesis deals with the study of flux avalanches in structured superconducting thin films. We have studied crystalline Nb and amorphous Mo79Ge21 thin films decorated with arrays of antidots (ADs or holes) produced by electron beam lithography. The magnetic response of these specimens has been investigated by means of MOI, dc magnetization and ac susceptibility. Firstly, we have established a link among those three techniques in the regime dominated by flux avalanches. We have observed that the reentrant behavior in the ac susceptibility at low temperatures occurs as a consequence of flux avalanches. Essentially, there is reuse of the channels created by the first ac cycle in a regime where the signal is weakly dependent on the temperature. Our results show that measurements of ac susceptibility versus ac field amplitude can be used to detect flux avalanches, since the signature of the flux avalanches appears as noisy curves of both ac susceptibility components. As a consequence, the critical current density as a function of temperature [Jc.T ] obtained by using the Bean model whose validity is assured by Cole-Cole plots is smooth for higher temperatures and, below a certain temperature onset, a non-smooth and noisy behavior takes place due to the avalanches. The temperature dependence of Jc.T,H was determined for different values of the applied magnetic field. The stability/instability frontier was then identified as the limiting temperature below which the curve Jc.T,H becomes noisy, indicating the occurrence of avalanches. Associated with this limiting temperature, the threshold critical current density to trigger avalanches is essentially independent of the magnetic field. This frontier corresponds to the upper threshold limit for the occurrence of avalanches. The effect in a thin film of a graded distribution of ADs which follows nearly the flux profile described by the Bean model has been studied. Compared to the uniform distribution, there is an increase of the critical current density at low fields. Moreover, viii the flux avalanches, highly induced by the presence of an array of ADs, have their activity reduced in temperature and magnetic field. For the first time, flux avalanches have been visualized in amorphous Mo79Ge21 thin film, both in plain and decorated thin films. Finally, we have investigated the influence of the lattice symmetry and AD geometry on the flux avalanche morphology. We have observed avalanches with the habit of forming trees where the trunk is parallel to the main axis of the square lattice and the branches form angles of 45 degrees. In addition to that, we have found an anisotropic penetration in a Nb thin film decorated with a square lattice of triangular ADs. Besides that, a sample having one half of the ADs in the form of squares, and the other half being circles, has been observed to present avalanches of different morphologies on each of its halves. We have also studied an a-MoGe thin film with a centered rectangular 2D Bravais lattice with square ADs which shows penetrations with different angles depending on the edge. The overall features of the avalanches, and in particular the 45-degree direction of the branches, have been confirmed by numerical simulations using the thermomagnetic model. Superconductivity, structured thin films, flux avalanches, magneto-optical imaging.
Avalanches são eventos repentinos e dramáticos que ocorrem na natureza. A técnica de imageamento por magneto-ótica (MOI) tem permitido visualizar a penetração abrupta de fluxo em supercondutores, as chamadas avalanches de fluxo, que ocorrem devido a instabilidades termomagnéticas na matéria de vórtices. A morfologia dessas avalanches de fluxo em filmes finos supercondutores prístinos é singular e se desenvolve de maneira dendrítica, isto é, com ramificações. Do ponto de vista prático, as avalanches de fluxo são prejudiciais para aplicações dos filmes finos supercondutores. Nos últimos anos, no entanto, tem-se alcançado um bom entendimento da física básica do fenômeno, bem como maneiras para suprimir essas avalanches. Esta tese trata do estudo de avalanches de fluxo em filmes finos com uma estrutura de defeitos. Para tal, usamos filmes finos cristalinos de Nb e amorfos da liga Mo79Ge21 decorados com arranjos de antidots (ADs), ou buracos, produzidos por litografia por feixe de elétrons. A resposta magnética desses filmes foi investigada através de MOI, magnetização dc e suscetibilidade ac. Na primeira parte dos resultados, uma conexão entre essas técnicas foi estabelecida no regime de avalanches de fluxo. Foi observado que o comportamento reentrante da suscetibilidade ac em baixas temperaturas ocorre devido `as avalanches de fluxo. Essencialmente, há o reuso dos caminhos ou canais criados pelo primeiro ciclo ac em um regime em que o sinal é fracamente dependente da temperatura. Esses resultados também mostraram que a suscetibilidade ac pode ser usada para detectar avalanches de fluxo, seja pela construção da curva de corrente critica dependente da temperatura Jc.T ou monitorando o ruído nas curvas do tipo Cole-Cole. Assim, a fronteira de instabilidades termomagnéticas/estabilidade foi construída variando-se o campo dc aplicado, tendo sido obtido, um limiar constante de Jc.T para o disparo das avalanches. Essa observação está de acordo com o modelo termomagnético e refere-se ao limite superior da ocorrência das avalanches de fluxo. Também foi estudado o efeito da inserção de um arranjo de antidots distribuídos de maneira gradiente, que segue aproximadamente a distribuição de fluxo descrita pelo Modelo de Bean. Comparada com uma distribuição uniforme, um aumento da densidade de corrente crítica foi observada para a região de baixos campos. Além disso, as avalanches de fluxo, que são altamente induzidas pela presença de ADs, apresentaram uma redução em sua ocorrência, tanto em magnitude do campo magnético aplicado quanto em temperatura. Pela primeira vez, foram observadas avalanches de fluxo em filmes finos amorfos de Mo79Ge21 com e sem uma rede de ADs. x Por fim, a influência da simetria da rede e da geometria do antidot na morfologia das avalanches de fluxo foi investigada. Para filmes finos decorados com uma rede quadrada de ADs quadrados, as avalanches têm o tronco paralelo ao eixo principal da rede de ADs, com ramificações em ângulos de 45 graus como em uma árvore de Natal. Além disso, penetrações abruptas anisotrópicas foram vistas em um filme fino de Nb decorado com uma rede quadrada de ADs triangulares. Uma mudança na morfologia das avalanches também foi observada em um filme com metade dos ADs quadrados e a outra metade circular. Também foram observadas penetrações com diferentes ângulos em uma rede retangular centrada de ADs quadrados dependendo da borda. Por fim, as características gerais das avalanches, em particular a de ramificações em 45 graus, foram confirmadas por simulações numéricas usando o modelo termomagnético.
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Hammouda-Ammari, Hajer. "Violence du langage, langage de la violence : étude comparée chez quatre cinéastes italiens : Rossellini, De Sica, Visconti, Pasolini." Paris 3, 2007. http://www.theses.fr/2007PA030056.
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L’œuvre cinématographique de Rossellini, Visconti, De Sica et Pasolini est si riche, si diversifiée, toujours poignante par la virulence des thèmes qu’elle traite et qui s’inscrivent au cœur même de la réalité. Les outils privilégiés de ces cinéastes italiens pour capter cette réalité dans sa nudité et dans son extrême violence sont : la « parole » poétique et authentique, dialectale ou argotique, dont le sens est souvent inconnu ou difficile à décrypter, la gestuelle naturelle des corps et les mimiques des visages dont les personnages sont dotés, ensemble de signes recueillis grâce à une caméra omniprésente. Le tout est restitué par le biais d’« images » qui, traversées par des pointes de picturalité et de sculpturalité chez Visconti et Pasolini, captées avec poésie et vibration dans l’art de Rossellini et De Sica, là où surgit le tragique, donnent à la réalité un sens fort symbolique : celui de la palpitation du vivant. En partant de Roma città aperta, Sciuscià, La terra trema et Accattone, cette recherche s’attache à cerner le langage verbal et le langage non verbal de la violence contenus dans ces films. Elle consiste en premier lieu à aborder la question de la langue en l’identifiant puis en approfondissant ses aspects pragmatique et lexical qui reflètent le mécanisme de la violence, à explorer le langage mimogestuel qui, combiné au langage visuel adopté par chaque cinéaste, parvient à nous restituer la part violente du réel. Cette recherche nous enseigne comment la diversité des styles mène à l’unicité de l’objectif : celui d’atteindre la violenceThe cinematographic work of Rossellini, Visconti, De Sica and Pasolini is of an important abundance, so diversified, always characterized by the virulence of the topics treated, that are inspired by the reality. The privileged material of these Italian moviemakers to register this reality in its nudity and its extreme violence are : the poetic and authentic, dialectal or slang “word”, which sense is often unknown or difficult to decipher, the natural gesture and expression of the faces offered by interprets, signs collected thanks to an omnipresent camera. The whole is restored through “images” which, picked up with pictural and sculptural styles in Pasolini and Visconti’s films, collected with poetry and vibration in the art of Rossellini and De Sica, where the tragedy emerges, give to the reality a very symbolic meaning : the palpitation of life. Starting with the analysis of Roma città aperta, Sciuscà, La terra trema and Accattone, this work attempts to determine both the verbal language and the non verbal language of the violence contained in these films. It consists first on tackling the question of the language by identifying it, then by looking further into its pragmatic and lexical aspects which reflect the mechanism of violence, to explore the gestural language which, combined with the visual language adopted by each moviemaker, manage to reproduce faithfully the violent part of reality. This research shows us how the diversity of styles carries out to a unique objective : reaching the violence
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Gonçalves, Vivia Ruth Abrantes. "DETERMINAÇÃO SIMULTÂNEA DE METAIS EM ÁLCOOL COMBUSTÍVEL UTILIZANDO VOLTAMETRIA DE REDISSOLUÇÃO ANÓDICA EM MEIO ÁCIDO." Universidade Federal do Maranhão, 2008. http://tedebc.ufma.br:8080/jspui/handle/tede/891.
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Previous issue date: 2008-02-12Conselho Nacional de Desenvolvimento Científico e Tecnológico
Brazil is pioneering in the use of ethanol as combustible. It is a renewable fuel that is contributing for to reduce the levels of CO2 emission in the atmosphere, but that present contaminant such as Zn, Cu, Cd, Fe, Cl, Ni, Co e Pb metals. The presence of heavy metals in fuel ethanol is obtained in different steps as production and storage of ethanol, therefore, the monitoring of these inorganic contaminants is of fundamental importance for the quality of the fuel ethanol. Due to high sensibility of stripping voltammetric techniques for quantification of heavy metals and a few number of works in the literature for this kind of matrix, the objective of this work was optimize a procedure in order to contribute to this important subject that is the determination of metal trace in fuel ethanol, using a mercury film electrode (MFE). The following parameters were optimized: supporting electrolyte concentration, preconcentration time, deposition potential, scan rate, pulse amplitude, pH and composition of the reaction medium. Sensitivity was evaluated through the peak current in the simultaneous determination of Cd(II), Pb(II) and Cu(II) metal ions. The results optimized were: concentration HNO3: 5,0 x 10-3 mol.L-1, tpre: 6 minute, Edep: -700 mV, pH: 2.0 and composition of the water/ethanol mix solution (80/20%). Concentrations of Cd(II), Pb(II) and Cu(II) were studied in the concentration range between 2,0 x 10-9 and 1,0 x 10-8 mol.L-1 and the analytical curves presented good correlation coefficients (near 1,0) and sensitivity amperometric with the following values for Cd(II), Pb(II) e Cu(II) metal ions, respectively: 37.5 A.L.mol-1, 31.5 A.L.mol-1 e 77.4 A.L.mol-1. The detection limits found for Cd(II), Pb(II) and Cu(II) were of 4.2 x 10-10 mol.L-1, 4.6 x 10-10 mol.L-1 and 9.0 x 10-10 mol.L-1, respectively. The quantification limits were 1.4 x 10-9 mol.L-1, 1.5 x 10-9 mol.L-1 and 2.0 x 10-9 mol.L-1 for Cd(II), Pb(II) and Cu(II), respectively. The application of the optimized procedure in commercial fuel ethanol sample presented a good analytical performance and the concentrations of the metals were obtained by standard addiction method, presenting the following results: 4.7 x 10-8 mol.L-1 for Pb(II) and 1.7 x 10-7 mol.L-1 for Cu(II). Cd(II) was not detected on these samples. The statistical evaluation presented good results of precision (CV) for Pb(II) 18.7% and Cu(II) 8.63 %. The proposed method was compared with Graphite Furnace Atomic Absorption Spectrometry (GFAAS) for quantification the metallic species in commercial fuel ethanol and the results showed good agreement among the two techniques
O Brasil é pioneiro no uso de etanol como combustível. Trata-se de um combustível renovável que vem contribuindo para reduzir os níveis de emissão de CO2 na atmosfera, mas que apresenta contaminantes tais como os metais Zn, Cu, Cd, Fe, Cl, Ni, Co e Pb. A presença de metais pesados em etanol combustível é oriunda das diferentes etapas de produção e armazenamento do etanol, portanto, o monitoramento destes contaminantes inorgânicos é de fundamental interesse para a qualidade do etanol como combustível. Devido a alta sensibilidade das técnicas voltamétricas de redissolução para a quantificação de metais pesados e o pequeno número de trabalhos na literatura para esse tipo de matriz, o objetivo deste trabalho foi otimizar um procedimento que contribuísse com esse importante assunto que é a determinação de metais em nível de traços em etanol combustível, usando um eletrodo de filme de mercúrio (MFE). Os parâmetros otimizados foram: concentração do eletrólito suporte, tempo de pré-concentração, potencial de deposição, velocidade de varredura, amplitude de pulso, pH e composição do meio reacional. A sensibilidade foi avaliada pela corrente de pico na determinação simultânea dos íons metálicos Cd(II), Pb(II) e Cu(II). Os resultados otimizados foram: concentração de HNO3: 5,0 x 10-3 mol.L-1, tpré: 6 minutos, Edep:-700 mV, v: 20 mV.s-1, Amp.: 50 mV, pH: 2.0 e composição da solução mista água/etanol: 80/20%. As concentrações dos íons Cd(II), Pb(II) e Cu(II) foram estudadas na faixa de concentração entre 2,0 x 10-9 e 1,0 x 10-8 mol.L-1 e as curvas analíticas apresentaram bons coeficientes de correlação (próximo de 1,0) e sensibilidade amperométrica com os seguintes valores para os íons metálicos Cd(II), Pb(II) e Cu(II), respectivamente: 37,5 A.L.mol-1, 31,5 A.L.mol-1 e 77,4 A.L.mol-1. Os limites de detecção encontrados para Cd(II), Pb(II) e Cu(II) foram de 4,2 x 10-10 mol.L-1, 4,6 x 10-10 mol.L-1 e 9,0 x 10-10 mol.L-1, respectivamente. Os limites de quantificação foram 1,4 x 10-9 mol.L-1, 1,5 x 10-9 mol.L-1 e 2,0 x 10-9 mol.L-1 para Cd(II), Pb(II) e Cu(II), respectivamente. A aplicação do procedimento otimizado em amostras de etanol combustível comercial apresentou boa resposta analítica e as concentrações dos metais foram determinadas pelo método de adição padrão, apresentando os seguintes resultados: 4,7 x 10-8 mol.L-1 para Pb(II) e 1,7 x 10-7 mol.L-1 for Cu(II). Cd(II) não foi detectado nas amostras analisadas. A avaliação estatística apresentou bons resultados de precisão (CV) para Pb(II) 18.7% e Cu(II) 8.6%. A exatidão foi avaliada comparando os resultados obtidos pelo método proposto com Espectrofotometria de Absorção Atômica com Forno de Grafite (GFAAS), para quantificação das espécies metálicas em etanol combustível comercial e os resultados mostraram boa concordância entre as duas técnicas.
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Silva, Marcia Rejane Santos da. "Obtenção de pós e filmes finos do sistema SrTiO3:Nd." Universidade Federal da Paraíba, 2010. http://tede.biblioteca.ufpb.br:8080/handle/tede/7191.
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Previous issue date: 2010-12-15Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
SrTiO3 is a compound with perovskite structure usually found with cubic phase. This works reports the synthesis of powders and thin films of the undoped and Nd3+ doped SrTiO3, replacing Ti4+ or Sr2+ with the stoichiometries SrTi1-xNdxO3 (x = 0.00; 0.01; 0.02; 0.04) and Sr0.99Nd0.01TiO3. The powders were synthesized by the polymeric precursor method. The thin films were prepared by chemical solution deposition (CSD) using the spin coating technique and by pulsed laser deposition (PLD), being deposited on LaAlO3 (100), MgO (100), SrTiO3 (100), Al2O3-R, and SiO2. The structural and optical properties of these materials were evaluated by infrared spectroscopy, UV-vis spectroscopy, photoluminescent emission, micro Raman spectroscopy and X-ray diffraction (XRD) Rietveld refinement of the XRD patterns was realized for powder samples. Moreover the photocatalytic property was evaluated in the degradation of textile dyes. The coexistence of the cubic and tetragonal phases for SrTiO3 powders was confirmed after calcinations at 550 oC. For doped samples calcined at 700 oC, it was observed that the sites occupied by Nd3+ influenced in the amount of these phases, leading to a direct influence in the photoluminescent emission. Emission in the yellow region was observed, while temperature increase lead to a shift to the green region, with higher energy indicating that short range ordering occurred. Thin films deposited on LaAlO3 substrate showed high quality epitaxial growth by CSD and a very high quality by PLD. On MgO doping changed the film orientation. For deposition on Al2O3-R and SiO2, polycrystalline films were obtained. Photocatalytic degradation efficiency was similar in powders and undoped films, increasing for films doped with 4 % of Nd3+ when synthesis was done by PLD. Key words:
SrTiO3 é um composto de estrutura perovskita comumente encontrado na fase cúbica. Este trabalho reporta a síntese de pós e filmes finos deste composto na sua forma pura e dopada com Nd3+ em substituição a Ti4+ ou Sr2+ nas estequiometrias SrTi1-xNdxO3 (x = 0,00; 0,01; 0,02; 0,04) e Sr0,99Nd0,01TiO3. Os pós foram sintetizados pelo método dos precursores poliméricos. Os filmes finos foram preparados pelo método de deposição de solução química (CSD) utilizando a técnica spin coating e pelo método de deposição por laser pulsado (PLD), sendo depositados em substratos de LaAlO3 (100), MgO (100), SrTiO3 (100), Al2O3-R, e SiO2. As propriedades estruturais e óticas desses materiais foram avaliadas por espectroscopia de infravermelho, espectroscopia UV-Vis, espectroscopia de emissão fotoluminescente, espectroscopia micro Raman e difração de raios-X (DRX). Refinamento Rietveld dos dados de DRX foi realizado para algumas amostras em pó. Além disso, a propriedade fotocatalítica foi estudada frente à degradação de corantes têxteis. A coexistência das fases cúbica e tetragonal para os pós de SrTiO3 foi confirmada, já na temperatura de 550 ºC e foi verificado para as amostras dopadas (700 ºC) que o sítio de ocupação do Nd3+ influenciou na quantidade dessas fases. Esse resultado teve influência direta na propriedade fotoluminescente observada. Os materiais emitiram principalmente na região do amarelo, mas com o aumento da temperatura essa região se deslocou para o verde (maior energia) indicando a organização do sistema. Os filmes finos depositados sobre o substrato de LaAlO3 mostraram crescimento epitaxial de alta qualidade por CSD e de qualidade muita alta por PLD. Sobre MgO a dopagem influenciou na orientação dos filmes. Os filmes depositados em Al2O3-R, e SiO2 foram policristalinos. A eficiência de degradação fotocatalítica foi similar entre pós e filmes puros, sendo aumentada com 4 % de Nd3+ nos filmes depositados por PLD.