Thesis (Ph. D.)--Texas A & M University, 1983. / Vita. Includes bibliographical references (leaves 110-120).

Thesis (Ph.D.) - University of Queensland, 2005. / In back pocket: "Legend for graphic logs". Includes bibliography.

Thesis (M.S.)--Oregon State University, 2010. / Printout. Includes bibliographical references (leaves 51-56). Also available on the World Wide Web.

abstract: According to the CDC in 2010, there were 2.8 million emergency room visits costing $7.9 billion dollars for treatment of nonfatal falling injuries in emergency departments across the country. Falls are a recognized risk factor for unintentional injuries among older adults, accounting for a large proportion of fractures, emergency department visits, and urgent hospitalizations. The objective of this research was to identify and learn more about what factors affect balance using analysis techniques from nonlinear dynamics. Human balance and gait research traditionally uses linear or qualitative tests to assess and describe human motion; however, it is growing more apparent that human motion is neither a simple nor a linear task. In the 1990s Collins, first started applying stochastic processes to analyze human postural control system. Recently, Zakynthinaki et al. modeled human balance using the idea that humans will remain erect when perturbed until some boundary, or physical limit, is passed. This boundary is similar to the notion of basins of attraction in nonlinear dynamics and is referred to as the basin of stability. Human balance data was collected using dual force plates and Vicon marker position data for leans using only ankle movements and leans that were unrestricted. With this dataset, Zakynthinaki’s work was extended by comparing different algorithms used to create the critical curve (basin of stability boundary) that encloses the experimental data points as well as comparing the differences between the two leaning conditions. / Dissertation/Thesis / Masters Thesis Bioengineering 2016

abstract: Impact cratering and volcanism are two fundamental processes that alter the surfaces of the terrestrial planets. Though well studied through laboratory experiments and terrestrial analogs, many questions remain regarding how these processes operate across the Solar System. Little is known about the formation of large impact basins (>300 km in diameter) and the degree to which they modify planetary surfaces. On the Moon, large impact basins dominate the terrain and are relatively well preserved. Because the lunar geologic timescale is largely derived from basin stratigraphic relations, it is crucial that we are able to identify and characterize materials emplaced as a result of the formation of the basins, such as light plains. Using high-resolution images under consistent illumination conditions and topography from the Lunar Reconnaissance Orbiter Camera (LROC), a new global map of light plains is presented at an unprecedented scale, revealing critical details of lunar stratigraphy and providing insight into the erosive power of large impacts. This work demonstrates that large basins significantly alter the lunar surface out to at least 4 radii from the rim, two times farther than previously thought. Further, the effect of pre-existing topography on the degradation of impact craters is unclear, despite their use in the age dating of surfaces. Crater measurements made over large regions of consistent coverage using LROC images and slopes derived from LROC topography show that pre-existing topography affects crater abundances and absolute model ages for craters up to at least 4 km in diameter. On Mars, small volcanic edifices can provide valuable insight into the evolution of the crust and interior, but a lack of superposed craters and heavy mantling by dust make them difficult to age date. On Earth, morphometry can be used to determine the ages of cinder cone volcanoes in the absence of dated samples. Comparisons of high-resolution topography from the Context Imager (CTX) and a two-dimensional nonlinear diffusion model show that the forms observed on Mars could have been created through Earth-like processes, and with future work, it may be possible to derive an age estimate for these features in the absence of superposed craters or samples. / Dissertation/Thesis / Doctoral Dissertation Geological Sciences 2018

Orientador: Ana Tereza Caceres Cortez / Banca: Helmut Troppmair / Banca: Ricardo Wagner ad-Víncula Veado / Resumo: Os Comitês de Gerenciamento de Bacias Hidrograticas têm sido objeto de uma série de estudos de caso, que apresentam as particularidades da formação, representação e atuação destes Comitês sem situá-Ios em um contexto maior. Neste trabalho procura-se mostrar uma visão geral da importância dada aos problemas ambientais a partir das últimas décadas do século XX, e, em especial, a importância assumida pelas questões de manejo, recuperação e conservação dos recursos hídricos no Brasil. São apresentados de modo detalhado o Sistema de Gerenciamento de Recursos Hídricos do Brasil, de 1997, e de Santa Catarina, de 1994, a fim de mostrar o papel dos Comitês de Gerenciamento de Bacias Hidrográficas nestes Sistemas. Tratando de modo mais específico, foram apresentadas as potencialidades e as dificuldades da atuação e o trabalho dos 16 Comitês de Gerenciamento de Bacias Hidrográficas no Estado de Santa Catarina, dentro da metodologia do Sistema de Gerenciamento de Recursos Hídricos que as idealizou. Por fim, são apontadas as contribuições que a Geografia pode dar ao processo de gestão de recursos hídricos no Brasil. / Abstract: The Committees of Hydrographic Basins Management have been object of many case studies, witch show the particularities of formation, representation and actuation of these Committees, without pointing out them in a bigger context. In this work the aim is to display a general view of the importance concerning to the enviromental questions from the last decades of the XX century and, specially, the value assumed by the hydrical resources' management, recovering and conservation issues in Brazil. It's detailed Brazil's (1997) and Santa Catarina's (1994) Hydric Resource Management Systems, intending to reveal the role of the committees of hydrographic basins in those Systems. More specifically, have been presented potentialities and difficulties in the actuation and the work of the 16 Committees of Management of Hydrographic Basins in the State of Santa Catarina, within the methodology of the Hydric Resources Management System that idealized them. To conclude, have been pointed out the contributions with which Geography can suply the process of hydrical resources management in Brazil. / Mestre

Orientador: Valter Hernandez / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo / Made available in DSpace on 2018-08-14T23:51:01Z (GMT). No. of bitstreams: 1 Oran_LuizGustavoPauloBarros_M.pdf: 2986167 bytes, checksum: b12f66624170e653dbebe9b3c14972bf (MD5) Previous issue date: 2009 / Resumo: Com objetivo de apresentar um instrumento de gestão estratégica do Capital Intelectual para o Comitê de Bacia Hidrográfica do rio Itapecuru (MA), partindo da lei 9.433/97, gerou-se um mapa estratégico para a gestão de comitês de bacia Hidrográfica. O modelo tradicional do Balanced ScoreCard a partir dos conceitos das perspectivas financeira, cliente, processos internos e aprendizado e crescimento foi modificado para adequar-se ao contexto de Gestão de Bacia Hidrográfica. O mapa estratégico precede o BALANCED SCORECARD (BSC) e este, ao ser adaptado à Gestão de Comitês de Bacias Hidrográficas, exerce o papel de um painel estratégico na gestão para os trabalhos dos tomadores de decisão do comitê da bacia no processo de interação com o planejamento. Aspectos de alinhamento e a prontidão do Capital Intelectual dos membros com os objetivos propostos na Lei são assinalados como fatores críticos para o adequado desenvolvimento dos trabalhos. Na etapa inicial discutiu-se o conceito de gestão de bacias, segundo diferentes pontos-de-vista e modelos, em seguida são apresentados graus de participação do cidadão. E, para dar suporte à proposta, no momento seguinte, conceitos de gestão do conhecimento e de capital intelectual associam-se à explanação do BSC como ferramenta de gestão estratégica. Para tanto, é apresentada uma metodologia de identificação de membros para o comitê decisório de bacia. Através do estudo de casos da PCJ-SP e Jaguaribe-CE é proposto um modelo para a bacia do rio Itapecuru no Maranhão. Da construção do mapa estratégico e seu BSC para comitê de bacia - conforme a legislação - apresenta-se um conjunto de temas estratégicos, indicadores de resultado e vetores de desempenho cuja construção se dá tendo como objetivo a melhoria do Capital Social e alcance da Governança. Esse conjunto fornece um modo claro e de fácil assimilação por interessados em avaliar o desempenho dos trabalhos e o desenvolvimento alinhado de suas estratégias de gestão. / Abstract: From Brazilian Federal Law 9.433/97, was presented a strategic management tool of the Intelectual Capital to Watershed Committee of Itapecuru River. The traditional model of Balanced Scorecard was modified and customized to the river basin management. The strategic map come first of Balanced Scorecard(BSC), and so, this works as a strategic dashboard to decison-makers of watershed management committee onto the interaction with the planning process. Alignment sense and Intelectual Capital promptitude of members to the proposed ends into the law are underlined as critic factors to the suitable development of the works. First of all was presented the river basin management concepts, according to different views and paradigms, so citizen grade participation are introduced. To support this propose, The BSC is linked to the Intelectual Capital Management concepts as its Strategic Management Tool. A metodology to identify members is presented to the river basin decison-maker committee. By case analisys of PCJ-SP and Jaguaribe-CE, a new model to the Itapecuru River watershed is proposed. From the Strategic Map and the its BSC, in accordance to the Law, a strategic entity set to the dashboard is created to align them and improve the Social Capital to achieve the Governance. / Mestrado / Recursos Hidricos, Energeticos e Ambientais / Mestre em Engenharia Civil

Lake basins contain depositional systems whose stratigraphy and sedimentology are highly influenced by allogenic and authigenic processes. Identifying the relative roles of these controls is complicated in settings where both tectonic and climate influences control sediment inputs and accommodation availability. In order to identify how these controls may interact in carbonate lake basins the lacustrine Mayrán Formation, northeast México was investigated. The Mayrán Formation is well exposed and the strata geometries are well preserved. The necessary data needed to unravel these complexities was obtained using field based techniques (geological and structural mapping, sedimentary logging and sampling), combined with optical and electron optical microscopy, mineralogical (XRD), and geochemical (oxygen and carbon stable isotopes, total organic carbon [TOC], organic carbon isotopes, and U-Pb carbonate dating) techniques, to characterise the lake basins. These data reveal that the Mayrán Formation was deposited in four, northerly, down-stepping, broadly coeval, hydrologically linked, carbonate-dominated lake subbasins (the Mayrán Basin system), that formed at different elevations spanning ~500 m. Subbasin geomorphology was controlled by the inherited topography of the exhumed and eroded Parras foreland fold-and-thrust belt, as a result, the subbasins are compartmentalized by prominent sandstone ridges that form sills between subbasins. Sedimentary infill of the subbasins consists of a fluvio-lacustrine succession (carbonate and clastic) that overly an angular unconformity truncating the folded and faulted Cretaceous bedrock. Clastic sediments were preferentially trapped in the most proximal subbasin in the south, adjacent to the mountain front. In more distal settings to the north, carbonate production resulted in deposition of horizontally bedded lacustrine limestones with subordinated siliciclastics and evaporite minerals. Carbonate deposition occurred during overfilled to balance filled conditions. Prominent aggradational to progradational tufa clinoforms form at the spillover points between the subbasins, and interfinger up- and down-dip with the horizontally bedded lacustrine limestones. The tufas consist of steeply dipping clinoforms that prograde northwards. They formed by inorganic and biogenically mediated calcite precipitation as waters from the topographically upper lake overflowed the sill. U-Pb dating of speleothem cements formed in the tufas yield a Pliocene age (3.06 ± 0.2 Ma). The horizontally bedded limestones that predominantly fill the subbasins are composed of nine lithofacies. These are: ostracode mudstone-wackestone, clotted boundstone, gastropod wackestone-packstone, oncoid wackestone-packstone, stromatolite, charophyte wackestone-packstone, marlstones, crystalline carbonate and evaporite minerals. These lithofacies contain variable proportions of production-derived components, with subordinated detrital and diagenetic components. They overall contain inorganic and organic calcite (average 91%), organic matter (average 12.6 % TOC) and subordinated detrital quartz, feldspar and clay. Stable isotope conditions from stromatolite laminations (δ13C -6.3‰ and δ18O -8.0‰), and micritic matrix from samples in all the subbasins (δ13C -5.7‰ and δ18O -8.4‰), indicate that overall calcite deposition occurred in freshwater lakes, under predominantly oxic conditions. Carbonate particles deposited mainly by in situ disaggregation and by settling. Significant preservation of the organic matter likely occurred because of the fine grained carbonate matrix, and because of moderate rates of both carbonate sediment and organic matter production. Stacking patterns in the lake successions show an overall shallowing upward cyclicity. It is considered, that the effects of inherited basin geomorphology and climate, ultimately controlled facies variability and strata geometries in these subbasins.

Magister Scientiae - MSc / The reservoir quality (RQ) of well E-BA1 was characterized using thin sections and core samples in a petrographic study. Well E-BA1 is situated in the Bredasdorp Basin, which forms part of the Outeniqua Basin situated in the Southern Afircan offshore region. Rifting as a result of the break up of Gondwanaland formed the Outeniqua Basin. The Bredasorp Basin is characterized by half-graben structures comprised of Upper Jurassic, Lower Cretaceous and Cenozoic rift to drift strata. The current research within the thesis has indicated that well E-BA1 is one of moderate to good quality having a gas-condensate component. / South Africa

Magister Scientiae - MSc / This study described porosity and permeability distribution in the deep marine play of the central Bredasdorp Basin, Block 9, offshore South Africa using methods that include thin section petrography, X-ray diffraction, and scanning electron microscopy, in order to characterize their porosity and permeability distributions, cementation and clay types that affect the porosity and permeability distribution. The study included core samples from nine wells taken from selected depths within the Basin. / South Africa