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Kuylenstierna, Elin. "The Crystal Size Distribution of Cerro Bayo." Thesis, Uppsala universitet, Mineralogi, petrologi och tektonik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-354154.
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To understand the complex structure of magmatic plumbing systems beneath volcanoes, one needs to study the different textures shown in the igneous rocks produced by the volcano in question. By doing this, one can get a clue of the processes that resulted in the final rock. One of the most important methods to use for studying rock samples is the Crystal Size Distribution (CSD), which can reveal a great amount of information about the history of the rock and give an insight in the journey of the crystals during their time in the magma. An extinct volcano named Chachahuén, located in Argentina, South America, was chosen for this study. Samples of rock were collected from one of its laccoliths named Cerro Bayo and was identified as hornblende-bearing dacite. The difference in crystal size was very significant in these samples, with both larger and smaller crystals embedded in the same matrix. This is interesting considering the fact that large crystals form by slow cooling of the magma while smaller crystals form as the magma cools rapidly. By studying the CSD and interpreting other textures found in samples of igneous rock, one may interpret different processes which affected the crystals, indicating what the structure of the magma chamber once looked like.För att kunna förstå den komplexa strukturen hos magmatiska system under vulkaner måste man studera olika texturer som påträffas i de magmatiska bergarter producerade av vulkanen i fråga. Genom att göra detta kan man få en inblick i de processer som resulterade i den slutgiltiga bergarten. En av de viktigaste metoderna att använda sig av för att studera stenprov är kristallstorleksfördelningen (CSD), som kan avslöja en mängd viktig information om bergarten och kristallernas historia under sin färd i magman. En slocknad vulkan vid namn Chachahuén belägen i Argentina, Sydamerika, valdes ut för denna studie. Stenprover samlades från en av dess lakkoliter med namnet Cerro Bayo, och identifierades som hornblände-bärande dacit. Skillnaden i kristallstorleken var mycket markant, med både större och mindre kristaller inbäddade i samma matrix. Detta är intressant med tanke på att stora kristaller bildas under en långsam nedkylning av magma medan mindre kristaller bildas när magma kyls ner snabbt. Genom att studera CSD och tolka andra texturer som finns hos magmatiska stenprover kan man tolka olika processer som har påverkat kristallerna, vilket i sin tur indikerar hur strukturen av magmakammaren en gång såg ut.
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Poblete, Jaime Andrés. "Geology, geochronology and structural reconstruction of the Cerro Bayo epithermal district, Chilean Patagonia." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/36466.
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The Cerro Bayo low-sulfidation epithermal district is located in the Aysén region, Chilean Patagonia. The oldest rocks that crop out in the district correspond to mainly rhyolitic fragmental successions of the Jurassic Ibáñez Formation which erupted based on biotite ⁴°Ar/³⁹Ar and zircon U-Pb ages, between ca. 154 and 144 Ma. The veins at Cerro Bayo are spatially associated with N-S aligned rhyolitic domes dated at 146.50±0.21 and 146.3±0.2 Ma (zircon U-Pb), intruding the volcanic rocks. Dacitic domes dated at 83.0±0.21 and 82.6±0.2 Ma (zircon U-Pb) are present to the west of the district at Laguna Verde. Silver and gold mineralization is hosted by steeply dipping N-S to NW trending quartz veins, that were emplaced in three main episodes based on adularia ⁴°Ar/³⁹Ar ages: (1) Mallines: ca. 144-142; (2) Bahía Jara and Brillantes: ca .137-124 Ma; and (3) Laguna Verde: 114-111 Ma.
Clay alteration mineralogy around the veins consists of illite±smectite±kaolinite–chlorite. At Mallines the illite+kaolinite–smectite mineral assemblage combined with the high illite crystallinity index indicates that these veins are not deeply eroded and the surface outcrops correspond to high levels within the low-sulfidation epithermal deposit model. At Bahia Jara the illite ± smectite – kaolinite and at Brillantes the illite–chlorite–kaolinite assemblages, and overall lower illite crystallinity indices indicate that the veins in these areas are more deeply eroded than at Mallines. Illite crystallinity index is lower for Brillantes than at Bahía Jara indicating that the level of exposure at Brillantes is deeper than at Bahía Jara. At Laguna Verde the mainly illite – smectite clay alteration assemblage plus the lowest illite crystallinity indices of the entire district indicate higher temperature of formation and, by inference, the most deeply eroded veins of the entire district.
The level of exposure of the veins has no relation with age of mineralization and the veins suffered differential degree of uplift and erosion after the Late Cretaceous. Moreover, glacial erosion has not uniformly affected the area. The observed textures and clay alteration assemblages at Mallines indicate important potential at 150–250 m depth if classic published deposit models are considered.
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Sun, Yang. "Magma Evolution of the Cerro Bayo Laccolith in the Chachahuén Volcanic Complex, Argentina." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-360467.
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The Chachahuén volcanic complex, with the Cerro Bayo laccolith as one of the largest intrusions, is part of back-arc Payenia volcanic province in western central Argentina. Laccoliths show potential for generating oil in sedimentary basins and producing ore deposits. It is crucial to put more effort into understanding the magma plumbing system beneath the Chachahuén volcanic complex, which the Cerro Bayo laccolith is part of. Thus this project present the first thermobarometric modelling for the Cerro Bayo laccolith and the Chachahuén volcanic complex. Several thermometers and barometers were applied to plagioclase, amphibole and clinopyroxene to understand magma evolution in the underlying plumbing system. The dacitic to rhyodacitic laccolith rocks from Cerro Bayo have porphyric textures with plagioclase in the form of both clots (glomerocrysts) and single crystals, amphibole and clinopyroxene as main phenocrysts, while enclaves are more mafic in composition and have equigranular textures. Plagioclase in the sample varies from andesine to labradorite with a composition of An22-An68, while the clinopyroxene can be classified into diopside to augite with cores (Mg#=76-84) and rims (Mg#62-72). Amphibole, varies from pargasite, ferropargasite to magesiohastingsite and hastingsite, which can be grouped into three groups according to the Mg#: low Mg# amphibole (Mg# = 40-51), medium Mg# amphibole (Mg# = 52-61) and high Mg# amphibole (Mg# = 62-78). Besides, most of the Fe-Ti oxides in the samples are titanomagnetite with Usp mol.% in the range of 0.04-0.54. Results from clinopyroxene-liquid thermobarometers suggest a crystallization depth of 44 to 51 km for clinopyroxene cores and a crystallization depth of 19 to 31 km for rims, of which the derived crystallization temperatures are in the range of 1144 to 1170 °C and 973 to 1002 °C respectively. On the other hand, different thermobarometers of amphibole give consistent results of crystallization temperatures and depths. According to the amphibole-liquid thermometer, low Mg# (Mg#= 40-51) amphiboles have the lowest crystallization temperature in the range of 898 to 931°C, while medium Mg# (Mg#=52-61) amphiboles have higher crystallization temperatures in the range of 951 to 972°C and high Mg# (Mg# = 62-78) amphiboles have highest crystallization temperatures between 991 and 1013°C. The depth translated from pressure derived from amphibole-liquid barometers give a shallower crystallization depth range from 19 to 30 km for low Mg# amphiboles, a deeper crystallization depth in the range of 22 to 39 km for high Mg# amphiboles and deepest crystallization depth range of 27 to 41 km for medium Mg# amphiboles. Moreover, a depth from 2 to 20 km could be gained from the plagioclase-liquid thermobarometry which crystallized at 883 to 910°C. It is worth to point out that crystallization depth of clinopyroxene cores is deeper than the Moho in the Chachahuén area, while crystallization depth and temperatures of clinopyroxene rims are consistent with those of high Mg# amphiboles. Consistent temperatures and depths are also found for crystallization of plagioclase and low Mg# amphiboles which intergrow with each other. Thus, a multi-level magma plumbing system began from below the Moho, with a mushy zone in the upper crust, could be suggested to exist beneath the Cerro Bayo laccolith. Evidence from both petrology and geochemistry also indicate fractional crystallization as well as processes of magma mixing and recharge during magma evolution.Chachahuén火山综合体，包含其最大的侵入体Cerro Bayo岩盘，是位于阿根廷中西部Payenia弧后火山区的一部分。前人研究多着重于岩石学、地球化学和地层学方面，因而针对下伏岩浆涌升系统的研究在该地区极具前瞻性，需要投入更多工作。本文首次尝试对Chachahuén火山复合体应用温压计进行研究，针对斜长石、角闪石和单斜辉石应用了不同的温度计和压力计，以揭示下伏于Cerro Bayo岩盘的岩浆涌升系统中的岩浆演化。 来自Chachahuén火山复合体Cerro Bayo岩盘的英安质-流纹英安质火成岩具有板状-似斑状结构，其斑晶主要为单晶或聚合物形式存在的斜长石、角闪石及单斜辉石。此外，岩盘中还发现具等粒结构的酸性捕虏体的存在。样品中斜长石（An=22-68）主要成分为中长石至拉长石.单斜辉石主要为透辉石和普通辉石，常发育高镁值核部（Mg#=76-84）和低镁值环带（Mg#62-72）。角闪石主要为韭闪石、铁韭闪石、镁绿钙闪石和绿钙闪石，可根据镁值进一步划分为三个组：低镁值组（Mg# = 40-51），低镁值组（Mg# = 52-61）和高镁值组（Mg# = 62-71）。此外，样品中的钛铁氧化物重要为钛磁铁矿（Usp%=0.04-0.54）。 单斜辉石-熔体温压计的结果表明单斜辉石的核部和环带的结晶温度和深度有所差异：核部具有较高的结晶温度（1144-1170 °C）和较深的结晶深度（44-50km），而环带具有较低的结晶温度（973-1002 °C）和较浅的结晶深度（18-31 km）。与角闪石相关的不同温压计给出了类似的结晶温度和压力，其中存在的微小差异均在误差范围内。因此本文将角闪石-熔体温压计的结果作为最终结果，其显示低镁值角闪石具有较低结晶温度（898-931°C），中镁值角闪石具较高结晶温度（951-972°C），而髙镁值角闪石具最高结晶温度（991-1013°C）。角闪石的结晶深度特征有所不同：低镁值角闪石的结晶深度最浅（19-30km），髙镁值角闪石的结晶深度较深（22-39 km），反而中镁值角闪石结晶深度最深（27-41 km）。斜长石-熔体温压计给出的斜长石结晶温度和深度分别为883-910°C及1-20km。 值得一提的是单斜辉石核部的结晶深度位于研究区莫霍面之下。同时，单斜辉石的环带与髙镁值角闪石具有相似的结晶温度和深度，而斜长石及共生的低镁值角闪石具有相似的结晶温度。因此可以推测，Cerro Bayo岩盘之下，发育一个自莫霍面之下开始的多层岩浆上涌系统。而岩石学和地球化学的证据还表明在岩浆发育过程中岩浆分化结晶和岩浆重注和混合作用并存。
En lakkolit är en grund magmaficka och en vanligt förekommande del av en vulkan, vilken kan bilda en länk mellan djupa magmatiska aktiviteter och vulkanutbrott. Forskning om kompositionen och bildandet av grunda magmafickor kan hjälpa till att öka förståelsen om geologiska faror och naturresurser. Vid Cerro Bayo exponeras en grund magmakammare vilken utgör en del av Chachahuén vulkankomplexet i Argentina. Det här projektet fokuserar på det magmatiska lagringssystemet och magmautvecklingen vid Cerro Bayo. Magmasammansättningen och magmakammarens förhållanden såsom tryck, temperatur och vattenhalt samt vattensystemets struktur är viktiga faktorer som styr magmatiska processer. För att förstå magmautvecklingen under Cerro Bayo inleddes projektet med en kompositionsanalys av bergprover och mineral. Därefter genomfördes termobarometrisk modellering för att bestämma temperatur- och tryckförhållandena för kristalliseringen av mineraler i det magmatiska systemet. Resultaten av modelleringen tyder på att ett magmatiskt rörsystem av flera nivåer existerar under Cerro Bayo lakkoliten. Det djupaste magmamagasinet ligger på 44-50 km och når upp till 22-41 km i nedre jordskorpan, medan de grunda reservoarerna av magma ligger på ett djup av 2-20 km i övre jordskorpan som slutligen når den grunda magmafickan. Vidare indikerar analysen av mineralstruktur och mineralkemi processer av fraktionerad kristallisering samt påfyllning och blandning av magma under magmautvecklingen. Magman genomgick fraktionerad kristallisering under rörelser uppåt från de djupaste magmakammarna. Magmans temperatur varierar från högre än 1100 ° C till ~ 900 ° C. Ansamlingar av magma fortsatte att fylla på magmamagasin i nedre och övre jordskorpan. Blandning av magma inträffade när en ansamling varmare magma rörde sig från nedre till övre jordskorpreservoarer och påverkade såväl migrering av magma som placeringen av Cerro Bayo lakkoliten
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Nääs, Erika, and Marcus Olsson. "Viscosity and Crystal Size Distribution Comparison Between Different Areas in the Cerro Bayo Cryptodome." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-384282.
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Rojas, Puelles Carlos Alberto. "Magnetometría terrestre de alta resolución y polarización inducida en la búsqueda de sistemas de vetas mineralizadas en Laguna Verde, región de Aysén, Chile." Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/151861.
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Magíster en Ciencias, Mención GeofísicaEn este trabajo de tesis se realiza una exploración de magnetometría en laguna Laguna Verde, Chile Chico, Región de Aysén, para encontrar indicadores de la presencia de vetas, estructuras he intrusivos en su cuenca. Esta exploración es de interés particular de la empresa minera Cerro Bayo que en la actualidad explota recursos minerales en un costado de la laguna mencionada anteriormente. Además se complementa con algunas tomografías de resistividad eléctrica (resistividad aparente y polarización inducida), en lugares particulares seleccionados luego de la interpretación magnetométrica. La exploración realizada en este trabajo se divide principalmente en cuatro partes: factibilidad de la aplicación del método magnetométrico, midiendo errores que pueden ser encontrados en los datos adquiridos por factores del entorno o del trabajo de terreno mismo ; Logística y adquisición de datos en función del análisis anterior, en particular definir una estrategia concreta para realizar las mediciones; procesamiento de datos donde se aplican las correcciones clásicas para este tipo medición, además de aplicar las transformaciones y filtros habituales para respaldar el proceso de interpretación; interpretación de datos procesados en función de un contexto geológico definido. Como resultado de esta exploración se presentan una amplia serie de mapas de anomalías de contraste magnéticas proyectadas por sobre la topografía y el mapa geológico de la zona (perteneciente a Cerro Bayo), además de los correspondientes filtros y transformaciones. En el caso de la Tomografía de resistividad eléctrica, se presentan los modelos procesados e invertidos de resistividad y cargabilidad. Se concluye que la magnetometría de alta densidad a pequeña escala resulta, en el contexto de información, comparable a la aplicación clásica del método (aeromagnético a gran escala). Particularmente se pueden apreciar respuestas de anomalías de contraste magnéticas similares en zonas de vetas que ocurren también en otras zonas, convirtiendo a estas últimas en zonas de blancos de exploración, además de lineamientos e intrusiones en varias zonas de la cuenca de la Laguna que tienen expresión topográfica y/o batimétricas que las justifique (como islas), así como también otras respuestas aisladas desconocidas y abiertas a interpretación.
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Chinchón, Escobar Juan Ignacio. "Documentos sobre inclusiones fluidas V: Caracterización petrográfica y textural del distrito epitermal de Cerro Bayo, XI Región, Chile." Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/151289.
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GeólogoLa estrecha relación entre mecanismos de ebullición de fluidos hidrotermales, y depositación de metales base y preciosos ha sido documentada ampliamente por numerosos autores. Análisis petrográficos texturales y de inclusiones fluidas son capaces de revelar eventos de ebullición, y, por ende, se constituyen como una herramienta eficaz a la hora de delimitar posibles cuerpos de mena en un prospecto. Esta investigación tiene como propósito principal establecer criterios de exploración en el distrito epitermal de Ag-Au de Cerro Bayo, ubicado en la Región de Aysén, Chile. La investigación se plantea como un ejemplo, extrapolable a otros depósitos epitermales de metales preciosos, en el cual se pretende faciliar el desarrollo de las actividades exploratorias, mediante la identificación de posibles sectores y/o vetas económicamente interesantes en el distrito minero por medio de una metodología relativamente rápida y barata. El estudio revela la presencia de una amplia gama tanto de texturas de ebullición como de no ebullición en el distrito. La textura rompecabezas es ubicua en el distrito; le siguen en abundancia, la textura coloforme y de calcita hojosa y calcita hojosa reemplazada por cuarzo. La petrografía de inclusiones fluidas mostró arreglos de inclusiones fluidas secundarias ricas en líquido en coexistencia con ricas en vapor tanto en cuarzo euhedral como en fluorita, indicadoras de procesos de ebullición, así como secundarias ricas en vapor, indicadoras de procesos de vaporización violenta del fluido. Adicionalmente se reconocen eventos mineralizadores en ambas vetas, caracterizados por asociaciones de cuarzo rompecabezas con pirita con inclusiones de electrum, menor esfalerita y calcopirita; y adularia en asociación a pirita, acantita, electrum, esfalerita, arsenopirita, y magnetita. De lo anterior, se infiere que la ebullición de fluidos hidrotermales juega un rol fundamental en la precipitación de metales preciosos en el distrito de Cerro Bayo. Sólo los fluidos tardíos, registrados en fluorita, pudieron ser caracterizados mediante microtermometría. Estos poseen temperaturas en el rango 225 - 130°C, con salinidades entre 12% y 5% en peso NaCl eq. Las elevadas concentraciones de Cl detectados por métodos semicuantitativos indicarían que los complejos clorurados pudieron ser importante en el transporte metálico. Por último, a partir de la asociación mineralógica y textural, y tomando como referencia el modelo epitermal de Buchanan, se concluye que el sector de Laguna Verde es prometedor para la industria minera, el horizonte de ebullición se hallaría relativamente cercano a la superficie, con lo cual una zona de bonanza de altas leyes de Au y Ag podría hallarse aún preservada en profundidad.
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Gómez, Perales María José. "Reflexiones interculturales germano-españolas en los relatos de viaje de los científicos E. A. Rossmässler y J. Ezquerra del Bayo." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/86141.
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German-Spanish Intercultural Reflections in Travel Narrative by the Scientists E.A. Roßmäßler and J. Ezquerra del Bayo
Abstract
The present doctoral dissertation analyses the travel narrative by the German naturalist E.A. Roßmäßler Reise-Erinnerungen aus Spanien (1854) and the travel diary by the Spanish engineer J. Ezquerra del Bayo Viage científico y pintoresco por Alemania (1847) from an intercultural and comparative perspective.
The main objective of this study has been to determine the degree of permanence of the Spanish and German stereotypes transmitted through written tradition in the German travel narrative about Spain and in the Spanish travel narrative about Germany in the first half of the 19th century. To this end, most of this research has been devoted to the enquiry about the origin of the stereotypes about Germany and Spain, which had existed throughout the centuries. Taking as the theoretical framework for this dissertation the notion of national stereotypes in related intercultural studies, we have analysed the presence or absence of some of the attributes stereotyped in the travel literature of the first half of the 19th century.
Within the framework of travel narrative studies, considered as a literary genre, we have specifically focused on classifying the different publications according to a historical period, but also by taking into account their formal aspects, the text type, their structure and the motivations for undertaking a travel. Moreover, much attention has been paid to the topics dealt with, as well as the style and the tone used in the travel narrative under study. Starting from the premise that in this type of narrative the author and the narrator have the same identity or, at least, there is a mutual understanding between them, we have aimed to determine to what extent their biographical aspects such as the profession, social status, religion, age, origin, as well as the political ideology had impact on their intercultural perspective.
Furthermore, we have looked into the different topics that are dealt with in this type of narrative, namely means of transport, travel routes, accommodation, weather, landscape, and people's physical appearance and personality, in order to find out if the authors of the narrative analysed adopted a more objective standpoint in their intercultural reflections, or, if they were equally influenced by the image and the 19th century's stereotypes about Germany and Spain.
As a result of this analysis, it can be argued that despite a clear scientific motivation of the travel, as it is reflected by the objective descriptions in Ezquerra's and Roßmäßler's narrative, the spirit encouraging Roßmäßler was clearly romantic, while in the case of Ezquerra, it was customary. In this sense, the German naturalist addressed potential readers from the perspective of a hetero-stereotype created about Spain from the assumptions of Romanticism, while Ezquerra used a humorous, ironic, and in general, satiric tone, so common in the Spanish press and in the Spanish society at that time. The author used that tone to describe the German social reality adopting a truly personal concise style.Reflexiones interculturales germano-españolas en los relatos de viaje de los científicos E.A. Roßmäßler y J. Ezquerra del Bayo Resumen La presente tesis doctoral analiza el relato de viaje del naturalista alemán E. A. Roßmäßler Reise-Erinnerungen aus Spanien (1854) y el diario de viaje del ingeniero español J. Ezquerra del Bayo Viage científico y pintoresco por Alemania (1847) desde una perspectiva intercultural y comparativa. Uno de los objetivos generales de este estudio ha sido determinar qué grado de pervivencia existe de los estereotipos españoles y alemanes transmitidos a través de la tradición escrita en los relatos de viaje de alemanes en España y de relatos de viaje de españoles en Alemania en la primera mitad del siglo XIX. Para ello hemos dedicado gran parte de nuestra investigación a conocer el origen de esos estereotipos preexistentes a lo largo de los siglos. Partiendo de la base teórica que incluye los estereotipos nacionales en los estudios sobre interculturalidad, hemos investigado la presencia o ausencia de algunos de esos atributos estereotipados en los relatos de viaje de la primera mitad del siglo XIX. Tomando como marco teórico las investigaciones relativas a la literatura de viajes como género literario, ha sido uno de nuestros objetivos específicos adscribir las diferentes obras tratadas a una época determinada atendiendo a los aspectos formales, como el tipo de texto, la estructura del mismo y el motivo del viaje. Así mismo hemos prestado atención al contenido de los temas tratados y al estilo o tono empleado en las obras objeto de estudio. Partiendo de la premisa de que en el relato de viaje el autor y el narrador están identificados o al menos existe una connivencia entre ellos, hemos querido determinar qué incidencia tienen y qué rol desempeñan los aspectos biográficos, como la profesión, el estatus social, la confesión religiosa, la edad o la procedencia geográfica, así como la ideología o inclinación políticas en la manera de mirar y asimilar la realidad desde una perspectiva intercultural. Nos hemos preguntado al analizar los diferentes temas que aparecen en este tipo de textos (medios de transporte, estado de los caminos, alojamientos, clima, paisaje, fisonomía y carácter), si en las obras objeto de estudio los autores participan de una mayor objetividad en sus reflexiones interculturales o si éstas están igualmente influidas por la imagen y los estereotipos vigentes en el siglo XIX tanto sobre Alemania como sobre España. Como resultado de nuestra investigación hemos podido constatar que aun teniendo en cuenta el carácter científico del motivo del viaje, que aparece en descripciones objetivas tanto por parte de Ezquerra como de Roßmäßler, el espíritu sin embargo que anima las descripciones de Roßmäßler es romántico, mientras que el que se desprende del relato de Ezquerra es costumbrista. En este sentido, el naturalista alemán se dirige al potencial lector desde el heteroestereotipo creado sobre España desde los supuestos del Romanticismo. Ezquerra, por su parte, demuestra en su relato conocer bien el tono jocoso, irónico, en general satírico, que era habitual en la prensa española de la época -y creemos que también de forma general en la sociedad- y se sirve de él para transmitir la realidad social alemana desde un personal laconismo.
Reflexions interculturals germano-espanyoles en els relats de viatge dels científics E. A. Roßmäßler i J. Ezquerra del Bayo Resum La present tesi doctoral analitza el relat de viatge del naturalista alemany E. A. Roßmäßler Reise-Erinnerungen aus Spanien i el diari de viatge de l'enginyer espanyol J. Ezquerra del Bayo Viage científic i pintoresc per Alemanya des d'una perspectiva intercultural. Un dels objectius generals d'aquest estudi ha estat determinar quin grau de pervivència existeix dels estereotips espanyols i alemanys transmesos a través de la tradició escrita en els relats de viatge d'alemanys a Espanya i de relats de viatge d'espanyols a Alemanya en la primera meitat del segle XIX. Per això hem dedicat gran part de la nostra investigació a conéixer l'origen d'aquests estereotips preexistents al llarg dels segles. Partint de la base teòrica que inclou els estereotips nacionals en els estudis sobre interculturalitat, hem investigat la presència o l'absència d'alguns d'aquests atributs estereotipats en els relats de viatge de la primera meitat del segle XIX. Prenent com a marc teòric les investigacions relatives a la literatura de viatges com a gènere literari, ha estat un dels nostres objectius específics adscriure les diferents obres tractades a una època determinada atenent els aspectes formals, com el tipus de text, l'estructura d'aquest i el motiu del viatge. Així mateix hem prestat atenció al contingut dels temes tractats i l'estil o to emprat en les obres objecte d'estudi. Partint de la premissa que en el relat de viatge l'autor i el narrador estan identificats o almenys hi ha una connivència entre ells, hem volgut determinar quina incidència tenen i quin rol juguen els aspectes biogràfics, com ara la professió, l'estatus social, la confessió religiosa, l'edat o la procedència geogràfica, així com la ideologia o la inclinació polítiques en la manera de mirar i assimilar la realitat des d'una perspectiva intercultural. Ens hem preguntat en analitzar els diferents temes que apareixen en aquest tipus de textos (mitjans de transport, estat dels camins, allotjaments, clima, paisatge, fesomia i caràcter), si en les obres objecte d'estudi els autors participen d'una major objectivitat en les seues reflexions interculturals o si aquestes estan igualment influïdes per la imatge i els estereotips vigents en el segle XIX tant sobre Alemanya com sobre Espanya. Com a resultat de la nostra investigació hem pogut constatar que, tot i tenint en compte el caràcter científic del motiu del viatge, que apareix en descripcions objectives tant per part d'Esquerra com de Roßmäßler, l'esperit, però, que anima les descripcions de Roßmäßler és romàntic, mentre que el que es desprén del relat d'Ezquerra és costumista. En aquest sentit, el naturalista alemany es dirigeix al potencial lector des de l'heteroestereotip creat sobre Espanya des dels supòsits del Romanticisme. Ezquerra, per la seua banda, demostra en el seu relat conéixer bé el to jocós, irònic, en general satíric, que era habitual en la premsa espanyola de l'època -i creiem que també de forma general en la societat- i se serveix d'aquest per transmetre la realitat social alemanya des d'un personal laconisme.
Gómez Perales, MJ. (2017). Reflexiones interculturales germano-españolas en los relatos de viaje de los científicos E. A. Rossmässler y J. Ezquerra del Bayo [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/86141
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Boetsch, Hevia Magdalena. "Control estructural de la mineralización argento-aurífera y criterios de exploración en el distrito Cerro Bayo, región de Aysén, Chile." Tesis, Universidad de Chile, 2014. http://www.repositorio.uchile.cl/handle/2250/116325.
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Magíster en Ciencias, Mención GeologíaGeóloga
Desde la década de 1940 se ha reconocido la importancia de los sistemas de fallas como estructuras que hospedan mineralización. Esta tesis busca establecer las relaciones estructurales entre los procesos de deformación y de mineralización de plata y oro, para determinar blancos de exploración en el Distrito Cerro Bayo (DCB), región de Aysén, Chile. El área en estudio se ubica en el sector Laguna Verde del DCB, donde afloran las secuencias volcánicas del miembro inferior de la Formación Ibáñez de edad Jurásico (154 144 Ma). Éstas hospedan las vetas de cuarzo subverticales con mineralización de plata y oro (114 111 Ma), emplazadas en un ambiente epitermal de baja a intermedia sulfuración a través de sistemas de fracturas con orientación N S a NO SE. Sistemas de fallas con orientación NE SO a E O cortan las secuencias mineralizadas con desplazamientos principalmente normales, y menores componentes de rumbo, que habrían provocado una caída de los bloques occidentales al este de Laguna Verde. En las inmediaciones de Laguna Verde se estima que la orientación del eje de apertura principal del sistema de vetas (T), equivalente el eje mínimo de deformación (σ3), es horizontal y presenta una orientación de N57°E. Esta apertura fue definida según la actitud y potencia de las vetas. La orientación de apertura no habría variado para el sistema hidrotermal sincrónico y posterior a la mineralización de plata y oro. Esto permite determinar que las vetas principales presentan orientaciones de N33°O ± 10°, y las vetas secundarias presentan orientaciones entre N69°O N43°O y N23°O N11°E. Estas orientaciones permiten determinar siete zonas probablemente mineralizadas con plata y oro dentro del DCB, las que se establecen a partir de un análisis geométrico de fotolineamientos en las secuencias volcánicas de la Formación Ibáñez del DCB. Éstas se enumeran del 1 al 7, donde 1 corresponde a la que presenta una mayor frecuencia y largo de lineamientos asociados a la apertura principal. Estudios anteriores de inclusiones fluidas proponen que el sector Laguna Verde es el más erodado del distrito. Esto, junto al comportamiento de las fallas NE SO, indica que al oeste de Laguna Verde la mineralización de plata y oro, debería encontrarse más somera.
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Kwazu, Fidelis Chineme Bayo [Verfasser]. "Developing a Viable Strategy of Solving the Problems of Poverty in the Light of Human Rights : A Case Study of Igboland in Nigeria / Fidelis Chineme Bayo Kwazu." Frankfurt : Peter Lang GmbH, Internationaler Verlag der Wissenschaften, 2013. http://d-nb.info/1045173118/34.
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Yitbarek, Baye Andarge. "Hydrogeological and hydrochemical framework of complex volcanic system in the Upper Awash River basin, Central Ethiopia : with special emphasis on inter-basins groundwater transfer between Blue Nile and Awash rivers." Poitiers, 2009. http://theses.edel.univ-poitiers.fr/theses/2009/Yitbarek-Baye-Andarge/2009-Yitbarek-Baye-Andarge-These.pdf.
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Une approche utilisant plusieurs méthodes convergentes a été mise en oeuvre pour étudier le cadre hydrogéologique du système aquifère volcanique fracturé et complexe du bassin supérieur du fleuve Awash situé sur le bord du Rift éthiopien. L'écoulement des eaux souterraines et les mécanismes de recharge des différents aquifères ont été étudiés à l'aide de méthodes conventionnelles de terrain, de l'hydrochimie, de l'hydrologie isotopique et de la modélisation numérique des flux souterrains. Des relations lithohydrostratigraphiques ont été établies à partir des logs lithologiques de forages exploratoires profonds. Les résultats montrent un modèle d'écoulement et des caractéristiques hydrauliques des différents aquifères volcaniques très complexes. La corrélation litho-hydrostratigraphique indique que l'aquifère basaltique inférieur, constitué de scories poreuses et perméables, est continu tout le long depuis le Nil Bleu jusqu'à la zone étudiée. L'analyse de la variation temporelle et spatiale des échantillons d’eau provenant d'endroits différents a révélé des interactions nettes entre l'eau souterraine et l'eau superficielle. De nouvelles évidences des transferts d'eau inter-bassins sont apparues. Deux aquifères basaltiques régionaux (l'aquifère supérieur et l'aquifère inférieur) ont été identifiés, montrant des signatures hydrochimiques et isotopiques bien distinctes. Dans la partie sud de la zone étudiée, l'aquifère supérieur et l'aquifère inférieur forment un système aquifère régional non confiné. Dans les parties nord et centrale du bassin au contraire, il apparaît que les deux systèmes sont séparés par un aquiclude régional, donnant lieu par endroits à des puits artésiens. Les eaux souterrainex provenant des puits d'exploration profonds (plus de 250 m) pénétrant l'aquifère basaltique inférieur et des puits situés au sud se sont révélées modérément mineralisées (TDS 400-650 mg/l), avec une composition isotopique stable, relativement moins enrichie et avec presque pas de tritium. Par contre, l'aquifère supérieur superficiel a une concentration ionique moins importante, davantage enrichie isotopiquement. Les résultats des différentes méthodes montrent clairement qu'il existe un transfert d'eau souterraine du nord du bassin adjacent du Nil Bleu vers le bassin supérieur du fleuve Awash. Les résultats convergent également pour attester de l'origine commune de la recharge et de la continuité hydraulique de l'aquifère basaltique inférieur exploité par des forages. Ceci peut avoir des implications pratiques capitales car l'existence d'importantes ressources d'eau souterraine en profondeur peut résoudre les problèmes d'approvisionnement de nombreuses villes, y compris la capitale, Addis Ababa. Ces résultats pourront aussi contribuer à mettre à jour d'autres aquifères régionaux le long des limites du rift dans des zones ayant une structure hydrogéologique similaire à celle du bassin supérieur du fleuve AwashIntegrated approach has been used to investigate the hydrogeological framework of a complex fractured volcanic aquifer system in the Upper Awash river basin located at the western shoulder of the Ethiopian rift. The groundwater flow system and mechanism of recharge of different aquifers have been studied using conventional hydrogeological field investigations, hydrochemistry, isotope hydrology and numerical groundwater flow modeling techniques. Litho-hydrostratigraphic relationships were constructed from lithologic logs obtained from exploratory drilling of deep boreholes. The result indicates quite complex flow pattern and hydraulic characteristics of the different volcanic aquifers. The litho-hydrostratigraphic correlation indicates that the permeable and porous scoraceous lower basaltic aquifer is extended laterally all the way from the Blue Nile Plateau to the study area. . The analysis of the temporal and spatial variation of water samples from different places revealed clear undwater-surface water interactions. New evidences have also emerged on the inter-basin groundwater transfer. Two distinct regional basaltic aquifers (Upper and lower) are identified showing distinct hydrochemical and isotopic signatures. In the southern part of the study area the upper and lower aquifers form one unconfined regional aquifer system. In the northern and central part of the basin, it appears that the two systems are separated by regional aquiclude forming confined aquifers, in places with artesian wells. The groundwater from the deep exploratory wells (>250m) tapping the lower basaltic aquifer and wells located in the south were found to be moderately mineralized (TDS: 400-600 mg/l), with relatively depleted stable isotope composition and with almost zero tritium. In contrast, the upper shallow aquifer has lesser ionic concentration, more isotopically enriched. Evidences from the different methods clearly indicate inter-basin groundwater transfer from the Blue Nile basin to the Upper Awash basin. The evidences also converge to testify common origin of recharge, presence of hydraulic connectivity for systems tapping the lower basaltic aquifer. This has enormous practical implication in finding large groundwater reserve at a greater depth that can solve the current water supply problems of the community including the capital Addis Ababa. It will also have important role in finding more regional aquifers along the plateau-rift margins in many areas having similar hydrogeological setup as the study area
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Ledvina, Joseph A. "Responses of upland herpetofauna to the restoration of Carolina bays and thinning of forested bay margins." Connect to this title online, 2008. http://etd.lib.clemson.edu/documents/1211396757/.
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Schmitt, Erika L. "Bay Scallop, Argopecten irradians, Restoration in the Virginia Coastal Bays: The Role of Predation on Spring Vs Fall Cohort Survival." W&M ScholarWorks, 2015. https://scholarworks.wm.edu/etd/1539617958.
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While the importance o f predation in controlling many natural bivalve populations is well established, it is often overlooked in the restoration strategies for depleted populations. Adult bay scallops {Argopecten irradians concentricus) along the U.S. mid-Atlantic coast spawn multiple times per year, typically once in the early summer and again in the early fall. Larvae generally settle on seagrass leaves to avoid benthic predators, but shift to the sediment surface around 20 mm in size when they become less vulnerable to predation. The objectives o f this study were to 1.) Determine proportional survival o f two distinct size classes o f A. irradians in different seasons related to the two naturally occurring cohorts found in this region, 2.) Determine the identity o f key predators o f A. irradians in the Virginia coastal bays. The goal is to incorporate this information into a restoration strategy for a Virginia seaside lagoon system where A. irradians have been absent since the disappearance o f eelgrass in the 1930s. Tethering experiments, conducted in re-established eelgrass during summer and fall o f 2013 and 2014, o f small (~10 mm SH) and large (~32 mm SH) juvenile A. irradians showed significant differences between the two years, likely due to the differences in the predator community. They also showed much higher predation rates in July than in August or October for both 2013 and 2014. Blue crabs are significant predators o f A. irradians and were present only in 2014, affecting survival, especially o f the large size class. Fish predators, such as pinfish, pigfish, striped burrfish, and sheepshead appear to have controlled the survival o f small juvenile A. irradians. Our results generally show greater survival in the fall, thus perhaps focusing on deploying small A. irradians in the fall would increase survival. However, the large differences in survival between 2013 and 2014 point to the importance o f employing an adaptive restoration approach which incorporates real-time abundances o f predators into restoration activities, allowing for the release o f A. irradians at smaller sizes dependent on the composition o f the predator assemblage.
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Kleinschmidt, Kristopher. "Discovering the Bayou : successional restoration of Bayou Bienvenue." Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/4107.
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Calderón, Alvarez Catalina, and Zamorano Rocío Hermosilla. "Santiago bajo amenaza." Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/151304.
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Memoria para optar al título de periodistaEsta tesis indaga en el problema del cambio climático desde una perspectiva mundial para luego centrarse en las manifestaciones locales del problema a nivel nacional, con una mirada histórica y también hacia las medidas de mitigación de sus efectos y posibles soluciones.
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Menezes, Maria da Paz Fontes de Calheiros e. "Autotransplante do baço." Master's thesis, Universidade da Beira Interior, 2009. http://hdl.handle.net/10400.6/993.
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O Autotransplante do baço é uma técnica cirúrgica de conservação já muito discutida e reconhecida pela bibliografia, mas que ainda não é comunmente aceite e muito menos posta em prática. Este órgão desempenha várias funções por demais importantes para que possamos menospreza-las, essencialmente a função de regulação da população eritrocitária e de vigilância imunitária. O baço não é considerado um órgão vital, mas os esplenectomizados ficam mais susceptíveis a infecções graves IFPE (infecção fulminante pós esplenectomia) que em 50% dos casos leva à morte. A asplenia relaciona-se ainda com a recorrência de neoplasias e com o risco de trombose da veia porta Os traumatismos esplénicos, dependendo não só do grau da lesão, mas principalmente do equilíbrio hemodinâmico do doente, podem resolver-se com tratamento conservador não operatório. Se é obrigatória a laparotomia podemos utilizar a rafia simples ou complementada com cola biológica, próteses peri-esplénicas e esplenectomias parciais. Mas, quando a lesão esplénica é de Grau 4 ou 5 com atingimento do pedículo a única forma possível de conservar as funções do baço é realizar o autotransplante. Descrevo a técnica incidindo no tamanho dos cortes, local e forma de implantação apontando os exames complementares de diagnóstico indicados para comprovar que o autotransplante mantém as funções esplénicas. Faço uma discussão baseada em trabalhos experimentais em animais e humanos que analisaram tamanho dos cortes, quantidade de tecido, local de implantação e métodos para testar a conservação das funções esplénicas. Concluo que sempre que a esplenectomia, em caso de trauma, é inevitável a solução para preservação do órgão é o autotransplante.Spleen autotransplantation is a conservative surgical technique long discussed and acknowledged by literature, but still not generally accepted and implemented. This organ plays an important role in various body functions that can’t be despised, essentially in the regulation of erythrocyte population and immune surveillance. The spleen is not considered a vital organ but splenectomized patients have an increased risk of overwhelming post-splenectomy infection that leads to death in 50% of the cases. The asplenism is also correlated with carcinoma recurrence and risk of portal vein thrombosis. The splenic trauma, depending not only in the grade of the lesion, but primarily in the hemodinamic balance of the patient, can be resolved with nonoperative management. If laparotomy can’t be avoided, we can use simple or complemented splenorrhaphy with fibrin glue, absorbable mesh and partial splenectomy. But when the injury is a grade 4 or 5 with pedicle laceration, the only way of preserving splenic functions is by doing an autotransplant. I describe the technique including the slices size of tissue, the site and the surgical technique of implantation, indicating the complementary exams that reveal the maintenance of the splenic functions by the autotransplant. The discussion is based in experiments in animals and humans that analyzed the slices size, amount of tissue, implantation site and ways of testing the preservation of the splenic functions. I concluded that in case of trauma, when splenectomy is inevitable the solution to preserve organ functions remains in the splenic autotransplant.
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Boutin, Brian P. "Tidal tributaries and nearshore areas as nursery habitat for juvenile sciaenid fishes and other estuarine nekton in Delaware Bay and the Delaware Coastal Bays." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 193 p, 2008. http://proquest.umi.com/pqdweb?did=1654489861&sid=6&Fmt=2&clientId=8331&RQT=309&VName=PQD.
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Malago, Rodolfo. "Autotransplante experimental de baço." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/311399.
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Orientadores: Nelson Adami Andreollo, Norair Salviano dos ReisDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas
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Resumo: O baço é um órgão linfóide que tem importante papel na defesa dos organismos, participando no processo de filtração, fagocitose e produção de imunoglobulinas. Histologicamente é formado pelo estroma e o parênquima, sendo seu arranjo celular diferenciado em polpas branca e vermelha. Os principais tipos celulares na estrutura esplênica são: linfócitos T e B, macrófagos, plasmócitos, fibrócitos, reticulócitos e células dendríticas. Os doentes vítimas de traumatismos esplênicos e esplenectomizados assumem um estado de asplenia e consequentemente adquirem grande susceptibilidade à sepse a qual pode ser rapidamente progressiva e fatal. Assim, têm surgido opções terapêuticas após as esplenectomias, utilizando técnicas cirúrgicas conservadoras (tratamento conservador, esplenectomia parcial e esplenorrafias com ou sem aplicação de agentes hemostáticos) e por fim as técnicas de autotransplante esplênico. Os objetivos desta pesquisa experimental foram analisar macro e microscopicamente a evolução tardia do autotransplante de fragmentos de baço na cavidade peritoneal, epíplon e mesentério, após 24 semanas de observação. Foram utilizados 52 ratos Wistar, machos e adultos, submetidos a esplenectomia total e divididos em quatro grupos. O grupo I (controle) foi formado por oito animais escolhidos aleatoriamente entre os três grupos estudados. O grupo II por dezessete animais com implante de fragmento de baço solto na cavidade peritoneal; grupo III por dezoito animais com implante no epíplon e o grupo IV por dezessete animais com implante fixado na raiz do mesentério. Na avaliação histológica foram adotados critérios qualitativos e quantitativos, com a contagem de elementos celulares e não celulares. Os resultados mostraram que se formaram aderências aos tecidos adjacentes e neovascularização em todos os fragmentos transplantados. O grupo II apresentou polpa branca e vascularização preservadas. No grupo III foram observados polpa branca com formações folicular e bainha linfóide, e a polpa vermelha em aspecto cordonal apesar de hemorrágica. No grupo IV foram observados alguns cortes histológicos com depleção de polpa branca e vermelha, enquanto outros evidenciavam melhor preservação das polpas. A contagem de linfócitos revelou diferença significativa entre os grupos I e II e o grupo I e IV (p<0,05). A contagem de macrófagos ativos revelou diferença significativa entre os grupos III e IV (p<0,05) e similaridade entre I e III (p>0,05). Os outros elementos: macrófagos ativos fagocitando hemossiderina, plasmócitos, fibroblastos, fibrócitos, células gigantes, monócitos, espaços intersticiais e fibras de colágeno, não apresentaram diferença significativa entre os grupos. O autotransplante esplênico é factível, sendo o grande epíplon o melhor local para a sua fixação. Esta pesquisa demonstrou por meio de análise histológica qualitativa e quantitativa que o tecido esplênico autotransplantado no epíplon preserva sua função de defesa dos organismos
Abstract: The spleen is a lymphoid organ that plays important part in the organism defense, participating in filtration processes, phagocytosis and immunoglobulin production. Histologically, is formed by a stroma and the parenquima being its cellular arrangement differentiated in white and red pulps. The main cellular types in the splenic structure are: T and B lymphocytes, macrophages, plasmocytes, fibrocytes, reticulocytes and dendritic cells. The patients victims of spleen traumatisms and splenectomized assume an asplenia state and consequently they acquire a larger susceptibility to the sepses, which can be quickly progressive and fatal. Thus, it has appeared therapeutic options after the splenectomies, using techniques of conservative surgery (conservative treatment, partial splenectomies and splenorrhaphies with or without application of haemostatics agents), as well as techniques of splenic autotransplantation. The objectives of the research were to evaluate macro and microscopically the late evolution of the fragments of spleen autotransplanted in the greater omentum, mesenterium and peritoneal cavity, after 24 weeks of observation. To perform the experimental study, were employed fifty two Wistar rats, males and adults, submitted to total splenectomy and divided in four groups. The group (control) I was formed by eight animals chosen aleatorily among the three groups studied. The group II - seventeen animals with implant of spleen fragment in the peritoneal cavity; group III - eighteen animals with implant in the omentum and group IV - seventeen animals with implant fixed in mesenterium root. In the histological analysis were adopted qualitative and quantitative criteria, with the counting of no cellular e cellular elements. The results showed adherences to the adjacent tissues and vascularization in all of the fragments transplanted. The group II presented white pulp and preserved vascularization. The group III showed white pulp with follicular formations and lymphoid tissue preserved, and the red pulp in cordon aspect and hemorrhagic. The group IV presented depletion of white and red pulp, while others evidenced better preservation of the pulps. The counting of lymphocytes revealed significant difference between the groups I and II and the group I and IV (p < 0.05). The counting of active macrophages revealed significant difference between the groups III and IV (p < 0.05) and similarity between I and III (p > 0.05). The other elements: active macrophages phagocyting hemosiderine, plasmocytes, fibroblasts, fibrocytes, giant cells, monocytes, interstitial spaces and fibers of collagen, did not show significant difference among the groups. The splenic autransplantation is feasible, being the better place the greater omentum. This research demonstrated through qualitative and quantitative histological analysis that the splenic tissue autotransplanted in the omentum of Wistar rats preserves its function of defense of the organisms
Mestrado
Pesquisa Experimental
Mestre em Cirurgia
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Dickerson, Jason Allen. "Living museum of the bay : Chesapeake Bay Aquarium." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/65671.
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Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 1991.Includes bibliographical references (p. 69).
This thesis is the design of an aquarium in the industrial city of Newport News, Virginia The focus is a living museum that illustrates the diversity beauty and grandeur of a precious yet fragile estuary, the Chesapeake Bay. The thesis proposes by in creasing public awareness of the fragile tenure with nature, modern industrial society is the context, an industrial land scape is transformed into a Living/interpretive aquarium .
by Jason Allen Dickerson.
M.Arch.
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Hunter, Alexis F. "Botany Bay." Digital Commons at Loyola Marymount University and Loyola Law School, 2021. https://digitalcommons.lmu.edu/etd/970.
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When a troubled young woman’s investigation into her high school crush’s disappearance leads her into an entirely new dimension– a failed penal colony with supernatural forces, feuding inhabitants, and mortal danger- she must find the truth while also trying to find a way back. A One-Hour YA Fantasy Adventure Pilot.
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Cunin, Olivier. "De Ta Prohm au Bayon : Analyse comparative des principaux monuments du style du Bayon." Vandoeuvre-les-Nancy, INPL, 2004. http://docnum.univ-lorraine.fr/public/INPL_T_2004_CUNIN_O_Tome1.pdf.
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Cette étude a pour principal objectif l'élaboration de la chronologie relative du vaste programme architectural i de Jayavarman VII dont le royaume englobait la totalité du Cambodge et une large partie de la Thai͏̈lande à-la fin du XII" siècle. La construction de la chronologie générale des monuments dits du style du Bayon s'est appuyée sur une analyse archéologique des principaux temples de cette période complétée par une étude stylistique basée sur les travaux de Ph. Stem [Ph. Stem, 1965]. Ces. Résultats ont été complétés et partiellement validés par une étude archéométrique portant sur le comportement magnétique du grès, principal matériau constituant ces monuments. La chronologie locale et globale des monuments du style du Bayon a permis la mise au jour de quatre classes typologiques de temples régissant l'ensemble du programme architectural du Jayavarman VII. Il a été, de plus, possible de déduire quelles parties de celui-ci était exécutée dès 1191, date de consécration du Preah Khan d'Angkor. Cet essai de datation absolue des monuments du style du Bayon découle de l'analyse comparative de la chronologie relative de Ta Prohm et du Preah Khan d'Angkor avec leur description et la distribution de leur population divine qui en ont été faites dans les inscriptions de leur stèle respectiveThe main purpose of this study is the development of the relative chronology of the wide architectural program of Jayavarman VII whose kingdom included aIl of Cambodia and an ample part of Thailand, at the end of 12th century. The construction of the general chronology of the monuments known to belong to the Bayon style are based on an archaeological analysis of the principal temples of this period supplemented by a stylistic study based on work of Ph. Stem [Ph. Stem, 1965]. These results are complemented and partially validated by an archeometric study relating to the magnetic behavior of the sandstone, principal material of which these monuments are built. The local and global chronology of the monuments of the Bayon style allows bringing to light four typological classes of temples goveming the whole of the architectural program of Jayavarman VII. Moreover, it has been possible to deduce w hich parts of this program was executed since 1191, date of dedication of Preah Khan of Angkor. This test of the absolute dating of the monuments of the Bayon style is the result of the comparative analysis of the relative chrono log y of Ta Pro hm and Preah Khan of Angkor with their description and the distribution of their divine population as it was described in the inscriptions of their respective stele
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Farrera, Rocha Ana Luisa, and Garcóa Ulises Loyola. "“RESULTADOS EPIDEMIOLÓGICOS DE PACIENTES CON PATOLOGÍAS ESPLÉNICAS POST ESPLENECTOMIZADOS POR VÍA LAPAROSCÓPICA, EXPERIENCIA DE 8 AÑOS EN CENTRO MÉDICO ISSEMYM”." Tesis de Licenciatura, Medicina-Quimica, 2013. http://ri.uaemex.mx/handle/123456789/13952.
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Introducción: La esplenectomía laparoscópica ha surgido como un tratamiento seguro y efectivo para
una variedad de patologías esplénicas, reportada por primera vez en 1991 por Delaitre y Maigniem. El
objetivo fue revisar los resultados epidemiológicos de una serie de casos de pacientes sometidos a
esplenectomía laparoscópica de acuerdo a patologías esplénicas más frecuentes, tiempo quirúrgico,
conversión a procedimiento abierto, complicaciones y mortalidad.
Material y Métodos: Se realizó un estudio observacional, descriptivo y retrospectivo, de 61 pacientes
esplenectomizados por vía laparoscópica por patologías esplénicas en un periodo comprendido de junio
del 2003 a noviembre del 2010.
Resultados: Se incluyeron 61 pacientes, 44(72%) del sexo femenino y 17(28%) del sexo masculino, las
patologías más frecuentes fueron las hematológicas benignas: púrpura trombocitopénica idiopática
(78.6%), anemia hemolítica (4.9%) y esferocitosis (4.9%); el tiempo quirúrgico promedio fue de 89.5min,
el sangrado con más frecuencia fue de 30ml, la estancia intrahospitalaria promedio fue de 3 días, el
porcentaje de bazos accesorios fue de 8.1%, la tasa de conversión fue de 3.2%, se presentaron
complicaciones en 11.4% y la tasa de mortalidad fue de cero.
Conclusiones: Los resultados de esta serie son comparables con la literatura mundial donde las tasas de
morbi-mortalidad son bajas ofreciendo las ventajas de la cirugía de mínima invasión, por lo que las
esplenectomías laparoscópicas son eficaces y seguras.
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Spasojević, Zorana. "Biogenic silica and diatom centricpennate ratios as indicators of historical coastal pollution." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29476.
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Historical environmental changes in two shallow, unstratified, estuaries in Buzzards Bay, Massachusetts are compared, using three diatom paleo-production indicators: sedimentary biogenic silica (BSi), BSi flux and ratio of Centric to Penate diatoms. Both estuaries were exposed to pollution. New Bedford Harbor (NBH) has a history of intensive nutrient loading and industrial pollution, while the control site, Apponagansett Bay, has lower levels of nutrient loading. Consideration of local precipitation history and diatom parameters suggests that salinity-driven changes in diatom production are negligible. Over the past ∼350 yrs, BSi concentrations and fluxes are higher in NBH. Thus, overall diatom production is sensitive to nutrient enrichment and less responsive to industrial pollutants. The relationship between the C/P ratio and environmental conditions is not as clear, possibly due to its dependence on eelgrass abundance. The uniqueness of this study lies in its use of the parameters combined, as well as its geographic setting.
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Dzindzelėta, Vytautas. "Mechaninio baro gamybos rengimo kompiuterizavimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050612_214659-54858.
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Work planing automation, installation possibilities and future outlook at mechanical subdivision. To study how the work planing has changed before and after automation process and to analyse automation process methodology.
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Mariotti, Giulio. "Morphodynamics of shallow coastal bays." Thesis, Boston University, 2013. https://hdl.handle.net/2144/12815.
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Thesis (Ph.D.)--Boston University
PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.This thesis investigates the processes governing the hydro-morphodynamics of shallow coastal bays, through field investigations and numerical modeling. Particular attention is devoted to understand the coupling between three morphological units: salt marshes, tidal flats and tidal channels. This study demonstrates that sea level rise and sediment supply have a significant and complex control on the morphological evolution of coastal bays. Erosive processes in the lagoons ofVirginia Coast Reserve (VA) are explored through a detailed model for tidal currents and the dynamics of wind waves. The model reveals that both wave-induced erosion of the marsh boundary and tidal flat bed erosion increase with sea level rise. Both positive and negative feedbacks between wave energy at the boundaries and bottom shear stresses are predicted, depending on the fate of the sediments eroded from the salt marsh boundaries. A lD morphological model for the coupled evolution of marshes and tidal flats shows that both an increase in sea level and a decrease in sediment supply enhance marsh boundary erosion, suggesting that this erosion mechanism is a leading cause of marsh deterioration. In addtion, the model predicts that the scarp between salt marsh and tidal flat is a distinctive feature of marsh retreat, suggesting the use of this geometry as an indicator for ongoing erosion. Field investigations in Willapa Bay (WA) shed light on the transport of water and sediments in a channel-tidal flat complex. During calm weather suspended sediment concentration is higher in the channel than on the tidal flat, leading to a sediment flux toward the latter, while the opposite flux occurs during stormy weather. A "two-points" dynamical model shows that the morphology of a costal bay stems from a dynamical equilibrium between currents in the channels and wind waves on the tidal flats. Because multiple equilibria are present, abrupt morphological changes can be triggered by small changes in wind regime, sea level or sediment supply.
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Fity, Claudine. "L'épithelioma baso-cellulaire de l'anus." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR1M063.
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Granier, Torres Juan José. "Optimización de forma bajo incertidumbre." Tesis, Universidad de Chile, 2019. http://repositorio.uchile.cl/handle/2250/171815.
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Memoria para optar al título de Ingeniero Civil MatemáticoEl objetivo principal de este trabajo es estudiar un problema inverso geométrico con ruido estocástico, que consiste en una EDP lineal asociada a un funcional no lineal de mínimos. cuadrados. Posteriormente se quiere realizar un proceso de reconstrucción numérica con el objetivo de comparar la solución obtenida de forma determinista con la solución obtenida con ruido estocástico. Para la primera parte de este trabajo nos basamos en el estudio de Allaire y Dapogny [21]. Para la otra parte nos basamos en el método level set introducido por Osher y Sethian [18]. Dentro del enfoque estándar de resolución de problemas inversos geométricos está el parametrizar la forma geométrica y aplicar métodos de regularización a la parametrización. Este enfoque sufre de la limitación que para obtener aproximaciones convergentes se tiene que tener un conocimiento a priori de la estructura y topología de la forma geométrica buscada. Por la no linealidad del funcional, las derivadas de forma de segundo orden son complicadas de trabajar en su forma explícita, motivo por el cual es complicado aplicar un método de level set desde el punto de vista clásico, nos basaremos en la idea de level set para aplicar un método que solo use las derivadas de forma de primer orden.
PIA/Concurso de Apoyo a Centros Científicos y Tecnológicos de Excelencia con Financiamiento Basal AFB170001 CMM UMI 2807 CNRS y Fondecyt 1171854
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Howard, Jessi. "Bayou to Bench and Back." Thesis, Tulane University, School of Public Health and Tropical Medicine, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10188759.
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During and following the Deepwater Horizon (DWH) accident in 2010, concerns about air and seafood quality were paramount. Though individual perceptions varied, many people in coastal communities in southeast Louisiana felt they had been exposed to oil- and dispersant-related compounds. We hypothesized that implementation of a Community-based Participatory Research (CBPR) project would promote a more transparent and mutually beneficial relationship between researchers and the community. We conducted both in-home and community-based assessments (n=198) in culturally diverse populations most impacted by the DWH event, including the Vietnamese in New Orleans East and the residents of the Bayou communities. Levels of volatile organic compounds (VOCs) in paired indoor/outdoor air samples and polycyclic aromatic hydrocarbons (PAHs) in seafood samples were determined with chemical analysis. Data were collected from multiple self-administered surveys regarding environmental awareness and impact of the DWH event, access to, and trusted sources of, information, perceptions about safety, and selected behavioral and socio-demographic variables. In an effort to enhance public understanding of the interconnectedness of their health with the Gulf ecosystem, we disseminated the information directly to the participants as well as the larger communities at risk. Through post-dissemination follow-up surveys, we explored the effectiveness of our environmental CBPR research strategy with our primary goals being to improve risk communication and promote informed decision-making among our coastal populations.
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Hewitt, Chad LeRoy. "Marine biological invasions : the distributional ecology and interactions between native and introduced encrusting organisms." Thesis, Thesis (Ph. D.)--University of Oregon, 1993, 1993. http://hdl.handle.net/1794/9974.
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Cerida, Rengifo Sammy. "Diseño de un amplificador de señales neuronales de bajo ruido y bajo consumo de potencia." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2014. http://tesis.pucp.edu.pe/repositorio/handle/123456789/5463.
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El presente trabajo de tesis consiste en el dise~no de un circuito ampli cador para ser utilizado en
un sistema de adquisici on de se~nales neuronales. La topolog a del dise~no se baso en un ampli cador
cascodo plegado completamente diferencial (fully-di erential folded-cascode, FDFC) adaptado a
una topolog a de reciclaje (recycling [6]) en la cual se reutilizan corrientes que normalmente no se
utilizan en la topolog a convencional.
Los requerimientos m as importantes para este dise~no son su baja potencia y peque~na area
debido al tipo de aplicaci on al que esta enfocado este trabajo. El bajo ruido referido a la entrada
tambi en es un par ametro cr tico ya que el rango de voltaje de las se~nales neuronales pueden tener
amplitudes tan peque~nas como 1 V .
La tecnolog a en que se realiz o el dise~no es AMS0;35 m en el software CADENCE el cual
utiliza el simulador SPECTRE empleando el modelo BSIM3V3. Asimismo, se valid o el buen funcionamiento
del circuito mediante las simulaciones correspondientes de circuitos de bancos de
pruebas (testbench). Los resultados destacables del ampli cador son su ruido referido a la entrada
de 1;59 V , potencia de 105;98 W para una alimentaci on de 3;3V , una ganancia de lazo abierto
de 113;7dB, ganancia de lazo cerrado de 45;5dB y un ancho de banda de 7;512kHz. El area total
del circuito ampli cador es 0;122mm2.Tesis
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Watson, Sheree J. "Investigation of the relationship between marine bacteria and pseudo-nitzschia australis (bacillariophyceae)." Thesis, Thesis (M.S.)--University of Oregon, 1994, 1994. http://hdl.handle.net/1794/10072.
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Cziesla, Christopher A. 1969. "The transport and distribution of the toxic diatom Pseudo-nitzschia spp. in the Coos Bay estuary and the adjacent continental shelf." Thesis, Thesis (M.S.)--University of Oregon, 1998, 1999. http://hdl.handle.net/1794/9811.
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Typescript.
Includes vita and abstract.
Bibliography: Includes bibliographical references (leaves 84-88).
Description: x, 88 leaves : ill. ; 29 cm.Along the Oregon coast blooms of Pseudo-nitzschia spp. have been an almost annual occurrence since monitoring began in the late 80's. This study looks at the distribution of Pseudo-nitzschia spp., in relation to meteorological and oceanographic conditions. A series of transects (1995-98) were done in Coos Bay and over the adjacent continental shelf under a variety of oceanographic conditions. An intense sampling program was undertaken in June 1998, with simultaneous nearshore and in bay (Coos Bay) sampling, including a nearshore grid, 24 hour anchor station in the bay, and an in bay incoming tide drift study. The results suggest that blooms develop nearshore after upwelling events. In conditions of relaxed upwelling highest cell concentrations were found immediately adjacent to the coast in surface and mid-depth waters. At stations in Coos Bay, Pseudonitzschia spp. concentrations increased with the incoming tide. Nearshore phytoplankton populations were transported into the bay, initially in the more saline bottom waters, but were rapidly mixed throughout the water column by the turbulent flow in the channels. On ebbing tides there was a reduced number of phytoplankton in the water column, possibly indicating consumption by in bay filter feeders or sinking and deposition on the bottom.
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Patch, Mary Catherine. "Acoustic characteristics of bay bottom sediments in Lavaca Bay, TX." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2369.
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The purpose of this study is to examine the sediment stratigraphy and oyster reefs
of Lavaca Bay. There has been little previous research on the bay??s stratigraphy, and
information from this study is important for industry and resources management. The
Lavaca Bay estuary is a drowned river valley containing a history of estuary development
in the late Pleistocene and Holocene. We used a chirp sonar to gather acoustic reflection
profiles, which were classified to categorize and trace reflectors. The data were plotted to
make maps of the distribution of various reflection types and contour maps of reflector
surfaces. The maps were compared with previous studies of Lavaca Bay and Galveston
Bay to aid interpretation. The vertical sediment stratigraphy showed two main reflector
packages. The upper package, bay bottom to ~25 m depth, is mostly acoustically
transparent with a few, semi-continuous, prominent reflectors in the upper 5-10 m. The
lower package ranges from 15-40 m depth with several strong reflectors sometimes
underlain by unconformities. To classify reflector characteristics, the upper package was
divided into two categories, each with 4 sub-categories: 1) surface reflectors??weak,
medium, strong, and ringing, which describe the general acoustic return of the bay
bottom, and 2) strong, shallow reflectors??surface strong, mounds, buried strong, andburied multiples, which describe strong acoustic returns in the upper 5 m of stratigraphy.
Within the lower package, four categories were recognized: 1) subbottom
reflectors/horizons, occurring ~20-40 m depth, 2) deep wipeout (incoherent/wipeout
zone), ~10-30 m depth, 3) clinoforms, ~5-30 m depth, and 4) terraces, ~10-30 m depth.
The data interpretation agrees with previous studies suggesting Lavaca Bay filled
beginning with coarse sediment and grading to finer sediment. In addition, the surface
type reflectors are indicative of bottom type, the strong, shallow reflectors are largely
indicative of oyster reef/shell, and the subbottom reflectors are related to the Pleistocene
and bay fill. The location/extent of oyster reefs in the bay does not agree well with
previous studies, suggesting either oysters do not grow over older ones or differences
between the chirp sonar response and other methods significantly differentiate the
interpretation of their locations/extents.
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Heather-Clark, Stuart Andrew. "An environmental overview of the Walvis Bay 'Bay Area', Namibia." Master's thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/14717.
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Bibliography: leaves 97-100.This dissertation forms part of a process which began when DANCED initiated the first stages of a project aimed at aiding the Namibian Government in the development of an Integrated Coastal Zone Management _Plan for the coastline of the Erongo Region. DANCED requested the assistance of the MPhil students, from the Department of Environmental and Geographical Science of the University of Cape Town, in the compilation of a baseline report for the region. The first step involved the collection and synthesis of baseline data on all environmental factors (natural and social) pertaining to the Erongo Region. This was followed by individual research dissertations by each member of the class. After review of the Baseline Report, the greater Walvis Bay 'bay area ' was identified as a priority area in terms of coastal zone management of the Erongo Region. The aim of this dissertation is thus to provide an environmental overview of the Walvis Bay ' bay area' that can assist planners and relevant authorities in the effective management the area. Firstly, the importance of the study area as a conservation area is established. It is noted that the Walvis Bay wetland is one of the top five most important wetland areas in Africa. Secondly, there is little co-ordination and communication between the authorities that have jurisdiction over portions of the study area and this has led to ineffective management of the area. Thirdly, the study area is defined and the major human activities operating within the study area are identified and described.
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Boener, Joseph H. "Monterey Bay geoid." Thesis, Monterey, California. Naval Postgraduate School, 1994. http://hdl.handle.net/10945/30875.
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A high resolution local geoid was calculated for the Monterey Bay, CA using local gravimetry data, digital elevation data and The Ohio State University OSU91A global geopotential model. The theoretical accuracy of the calculated local geoid is 3.5 cm or better over 5 km. Local gravity data came from three sources: 1,549 land observations from the Defense Mapping Agency, 179 bottom gravity observations from two Naval Postgraduate School gravity surveys of Monterey Bay and 17,098 National Geodetic Survey land and ship gravity observations from the National Geophysical Data Center's Gravity CD-ROM. Digital terrain elevation data came from the Rocky Mountain Communication Inc. 3 Arc Second Digital Terrain Elevation CD-ROM. A GPS sea surface topography experiment conducted in October, 1993, had indicated an anomalous sea slope across the bay from Santa Cruz, California to Monterey, California. Comparisons between the calculated local geoid and the regional geoid for The United States, the National Geodetic Survey's GEOID93 indicated a possible explanation for the anomalous sea slope being a local slope in the geoid. Geoid, Monterey Bay, Sea surface.
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Xu, Long. "Numerical study in Delaware Inland Bays." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 121 p, 2006. http://proquest.umi.com/pqdweb?did=1163252151&sid=3&Fmt=2&clientId=8331&RQT=309&VName=PQD.
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Bidgood, Lee, and Banjo Romantika Band. "Performance at Bluegrass and Bayou festival." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etsu-works/1058.
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Serignolli, Lya Valeria Grizzo. "Baco, o simpósio e o poeta." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/8/8143/tde-06022018-121957/.
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Recentemente, tem aumentado o interesse acadêmico nas figurações do Baco romano, que, até então, não havia recebido tanta atenção quanto o Dioniso grego. Novos estudos têm mostrado como o repertório dionisíaco proliferou no Período Augustano, produzindo novas metáforas atreladas às transformações sociais, políticas e culturais da época. Horácio, o poeta que mais desenvolveu os temas dionisíacos entre os augustanos, apresenta diversas facetas do deus em diferentes gêneros poéticos, reservando a ele um lugar de destaque em suas Odes. Esta pesquisa preenche uma lacuna nos estudos de poética latina, discutindo questões associadas a Baco e ao simpósio em Horácio, tendo em vista os papéis do deus como herói deificado, divindade simpótica e orgiástica e patrono da poesia, em associação a temas como o amor, a política, a guerra, a patronagem e a composição poética. A tese divide-se em seis capítulos: dois capítulos introdutórios em que são considerados antecedentes e aspectos gerais de Baco e do simpósio, e quatro capítulos com a análise desses temas em Horácio. No terceiro capítulo, o enfoque é sobre o furor dionisíaco como impulso poético. Nos capítulos quatro e cinco, o simpósio - presidido por Líber - é observado como um cenário metafórico em que a persona poética de Horácio relaciona-se com amantes, patronos, poetas e amigos; um lugar onde o vinho combina com política, guerra, amor, amizade e poesia. No capítulo final, são analisadas questões de composição poética associadas ao engenho e ao furor poético dionisíacos.Recently, scholarly interest in the representations of the Roman Bacchus has increased, which had not received as much attention as the Greek Dionysus. New studies have shown how the dionysiac repertoire proliferated in the Augustan Age, producing new metaphors linked to cultural, social and political transformations that took place in the period. Horace, who is the most prolific of the Augustan poets in the use of dionysiac imagery, presents different aspects of the god in different genres, reserving a special place to him in his Odes. This research fulfills a gap in the studies of Latin poetics, exploring issues associated with Bacchus and the symposium in Horace, considering the gods roles as deified hero, sympotic and orgiastic divinity and patron of poetry in association with themes such as love, politics, war, patronage and poetic composition. The thesis is divided into six chapters, with two introductory chapters on the antecedents and general aspects of Bacchus and the symposium, and four chapters with an analysis of these themes in Horace. In the third chapter, I investigate the Bacchic enthusiasm as a metaphor for the poetic impulse. In chapters and four and five, I observe the symposium - presided over by Liber - as a metaphorical setting where the poet interacts with lovers, patrons, other poets and friends; a place where wine combines with politics, war, love, friendship and poetry. In the last chapter, I consider issues of poetic composition connected with dionysiac ingenium and poetic furor.
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Pizarro, Castro Ricardo. "Bajo pre supuesto : ¿trascendencia o desecho?" Tesis, Universidad de Chile, 2015. http://repositorio.uchile.cl/handle/2250/135100.
Full textAbstract:
Magíster en artes con mención en artes visualesTomando en cuenta el contexto del arte contemporáneo chileno y mi personal falta de recursos económicos al egresar de la carrera de artes, comencé desde el año dos mil a realizar operaciones de bajo presupuesto, que al mismo tiempo se proponían -‐en un principio-‐ escapar de la producción tradicional de la pintura. Sin embargo, éstas mantenían el diálogo con ella, reflexionando acerca del propio ejercicio pictórico, a través, por ejemplo, de la utilización de los materiales que le dan soporte y movilidad (bastidor y lienzo), como también a través de una ejecución que mantenía el principio artesanal de lo hecho a mano. Desde ahí es que surgen las primeras direcciones de las obras que aborda esta investigación. Por una lado, la problematización y puesta en escena de la noción de “bajo presupuesto” como un dispositivo de producción de obra en sí mismo. Por otro, una progresiva revisión acerca del soporte de obra y su movilidad. Con una ejecución basada en la propia mano de obra, que fue acentuando un hacer rotundamente artesanal, a través de gestos manual-‐mecánicos exhaustivos y/o repetitivos.
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Cuenca, Gotor Vanesa Paula. "Estudio de compuestos As2X3 bajo presión." Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/125699.
Full textAbstract:
[ES] El estudio de la materia sometida a condiciones extremas de presión y/o temperatura nos permite ampliar nuestros conocimientos sobre sus propiedades estructurales, elásticas, vibracionales, ópticas, eléctricas y magnéticas; comprender y predecir su comportamiento frente a estas condiciones; y valorar su aplicabilidad en ámbitos tan dispares como la computación cuántica, los semiconductores, la ciencia de materiales, la medicina o la farmacología.
La presión es una variable termodinámica relativamente rápida y fácil de modificar que nos permite avanzar en la comprensión del comportamiento de la materia en función de las múltiples propiedades que la definen. Cuando las propiedades de un material no estable en condiciones ambientales mejoran bajo presión, y se prevé que su utilización pueda desarrollar aplicaciones novedosas o mejorar las ya existentes, se puede estudiar la posibilidad de sintetizar este nuevo material a presión ambiente aprovechándonos de las barreras cinéticas entre las transiciones de fase.
El desarrollo tecnológico de las técnicas de caracterización de las propiedades de los materiales, así como de los modelos teóricos que permiten realizar cálculos ab initio, junto con la aplicación de altas presiones, han facilitado la consecución de los objetivos de análisis y comprensión de las propiedades estructurales, mecánicas, electrónicas y vibracionales de los compuestos de tipo As2X3 (sesquióxidos y sesquicalcogenuros de arsénico) de esta tesis doctoral.
Con este fin se recoge en la presente tesis el compendio de los trabajos realizados en varios compuestos de tipo As2X3, en concreto los compuestos estudiados han sido la arsenolita pura (As4O6), el compuesto resultante al medir la arsenolita con He como medio transmisor de presión (MTP) a altas presiones (As4O6.2He), el oropimente (alfa-As2S3) y el telururo de arsénico (alfa-As2Te3).
El análisis y la comprensión de las propiedades de estos compuestos ha supuesto un avance en el estudio de los sesquióxidos y sesquicalcogenuros del grupo 15, y allana el camino para diseñar nuevos sesquicalcogenuros del grupo 15 y compuestos relacionados con propiedades termoeléctricas o aislantes topológicas, tanto a presión ambiente como en condiciones extremas.[CAT] L'estudi de la matèria sotmesa a condicions extremes de pressió i/o temperatura ens permet ampliar els nostres coneiximents sobre les seus propietats estructurals, elàstiques, vibracionals, òptiques, eléctriques i magnétiques; comprendre i predir el seu comportament front a aquestes condicions; i valorar la seua aplicabilitat en àmbits tan dispars com la computació cuántica, els semiconductors, la ciència de materials, la medicina o la farmacologia. La pressió és una variable termodinàmica relativament ràpida i fàcil de modificar que ens permet avançar en la comprensió del comportament de la matèria en funció de les múltiples propietats que la defineixen. Quan les propietats d'un material no estable en condicions ambientals milloren sota pressió, i es preveu que la seua utilització puga desenvolupar aplicacions novedoses o millorar les ja existents, es pot estudiar la posibilitat de sintetitzar aquest nou material a pressió ambient aprofitant-nos de les barreres cinètiques entre les transicions de fase. El desenvolupament tecnològic de les técniques de caracterització de les propietats dels materials, així com dels models teòrics que permeten realitzar càlculs ab initio, junt amb l'aplicació d'altes pressions, han facilitat la consecució dels objectius d'análisi i comprensió de les propietats estructurals, mecàniques, electròniques i vibracionals dels compostos de tipus As2X3 (sesquiòxids i sesquicalcogenurs de arsenic) d'aquesta tesi doctoral. Amb aquest fi s'arreplega en la present tesi un compendi dels treballs realitzats a varios compostos de tipus As2X3, en concret els compostos estudiats han segut l'arsenolita pura (As4O6), el compost resultant de mesurar l'arsenolita amb He com a mitjà transmisor de pressió (MTP) a altes pressions (As4O6.2He), l'oropiment (alfa-As2S3) i el telurur d'arsenic (alfa-As2Te3). L'anàlisi i la comprensió de les propietats d'aquestos compostos ha suposat un avanç a l'estudi dels sesquiòxids i sesquicalcogenurs del grup 15, i aplana el camí per a disenyar nous sesquicalcogenurs del grup 15 i compostos relacionats amb propietats termoelèctriques o de aillants topològics, tant a pressió ambient com en condicions extremes.
[EN] The study of matter under extreme conditions of pressure and/or temperature allows us to extend our knowledge about their structural, mechanical, vibrational, electrical, optical and magnetic properties; understand and predict their behaviour under these extreme conditions; and validate their possible application in several fields such as quantum computing, semiconductors, material science or pharmacology. Pressure is a thermodynamic variable easy to modify which allows us to advance in the comprehension of the behaviour of the multiple properties of the matter. When the properties of a material unstable at ambient conditions show a significant progress, this material can be postulated as a possible candidate to develop novel properties or improve those already existing; then, the synthesis of this metastable compound can be studied by the application of pressure and temperature and taking advantage of the kinetic barriers that stabilize high pressure phases. The technical development suffered by the characterization techniques, which are used to analyse the properties of materials, together with the theoretical models that allows to perform ab initio calculations, have facilitated to reach the objective of the analysis and understanding of the structural, mechanical, electronic and vibrational properties of the compounds belonging to the As2X3 family (arsenic sesquioxides and sesquichalcogenides) studied in this PhD thesis. To this aim, the present PhD thesis collects a compendium of the works done about several As2X3 compounds. In particular, the compounds studied here have been: pure arsenolite (As4O6), the resulting material from expose the arsenolite with helium as pressure transmitting medium at extreme conditions of pressure (As4O6.2He), orpiment (alpha-As2S3) and arsenic telluride (alpha-As2Te3). The analysis and comprehension of the properties of these compounds have provided a significant advance in the study of sesquioxides and sesquichalcogenides belonging to the group 15, and pave the way to design new sesquichalcogenides of the same group and related compounds with thermoelectric or topological insulating properties, at ambient or under extreme conditions.
Cuenca Gotor, VP. (2019). Estudio de compuestos As2X3 bajo presión [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/125699
TESIS
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Romero, García Velvet. "Bajo Condena: Mujer, Culpa y Autonomía." Tesis, Universidad de Chile, 2007. http://www.repositorio.uchile.cl/handle/2250/106042.
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Luo, Jiangang. "Life history of the bay anchovy, Anchoa mitchilli, in Chesapeake Bay." W&M ScholarWorks, 1991. https://scholarworks.wm.edu/etd/1539616754.
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In lower Chesapeake Bay, the spawning season of the bay anchovy Anchoa mitchilli in 1988 was from early May to mid-September. Spawning was temporally synchronized and lasted for about 1.5 h each night. Spawning frequency per individual was every 4 d in early June and 1.3-1.9 d in other months. Batch fecundity was a linear function of fork length and body weight; regression slopes on 6 July and 4 August were significantly higher than those on 6 June and 31 August. Estimated mean total spawnings per female in 1988 was 54. Total egg production for a fish of average size was 45,110, which is equivalent to 346% of body biomass energy. Age determination based on lagenar otoliths showed that some fish spawned when as young as 2.5-3 months. Transport of the adult bay anchovy in darkness was studied in laboratory and field experiments. In a hydraulic flume, 99% of all fish were transported to the end of the flume in darkness at a current speed of 30 cm s&\sp{lcub}-1{rcub}&. In field experiments, fish marked with neutral red dye and released in a creek at flood tide were recaptured 5.1 km upstream 4 h after release at night, and were recaptured within 200 m of the release site 3 h after release in daylight. This nocturnal transport phenomenon may help in understanding behavior and distribution of pelagic estuarine fishes. The standardized CPUE data show long-term population fluctuations on the order of ten fold. The bay anchovy population also has extensive seasonal variations. A Fourier analysis removed the seasonal (short-term) variation from the long-term data series. An autoregressive analysis of the residual series indicated that it contained a significant first-order autoregressive process component (r&\sp2& = 0.26, P &\le& 0.0066), which was interpreted as a spawner-recruit relationship. Cross-correlation analysis indicated that bay anchovy population abundance was positively correlated with winter water temperature (r = 0.663, P &\le& 0.0001) and river flow (r = 0.376, P &\le& 0.027), but negatively correlated with the abundances of white perch (r = &-&0.437, P &\le& 0.011), and the squared function of residual wind speed (r = &-&0.377, P &\le& 0.026). A multiple regression model indicated that temperature, white perch abundance and wind made significant contributions (accounting for 78% of the variation) to the model.
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Finkelstein, Hetzel Alex. "Enfermedades de resolución quirúrgica y técnicas operatorias del bazo en el perro." Tesis, Universidad de Chile, 2012. http://repositorio.uchile.cl/handle/2250/131416.
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Memoria para optar al Titulo Profesional de Médico VeterinarioEl bazo es un órgano linfoide periférico secundario, que cumple con diversas funciones (inmunológicas, de filtración, de hematopoyesis y de reservorio). Morfológicamente, tiene aspecto alargado y plano, de ubicación abdominal craneal izquierda en posición dorsoventral. Lo irriga la arteria esplénica. Histológicamente se compone de estroma y parénquima. Respecto al diagnóstico de enfermedades esplénicas, los signos son poco específicos. La palpación sirve solamente en algunos casos, mientras que la hematología tiene poca utilidad. La radiografía y ultrasonografía permiten una aproximación diagnóstica de mejor calidad, aunque muchas veces no sea definitiva. El diagnóstico definitivo se obtiene mediante un estudio histopatológico de una muestra de tejido, obtenida mediante biopsia, ya sea percutánea o incisional quirúrgica. La esplenomegalia corresponde a un aumento por sobre el tamaño normal del bazo. Puede ser de tipo localizada o generalizada, dependiendo de la causa. Las enfermedades esplénicas de mayor prevalencia son las neoplasias. Existen benignas, como el hemangioma, o malignas, como el hemangiosarcoma (endotelial, de pronóstico reservado, que requiere de cirugía, quimioterapia e inmunoterapia), el linfosarcoma (elementos linfoides, mal pronóstico), el mastocitoma (piel, metástasis al bazo, mal pronóstico, cirugía y quimioterapia) y la histiocitosis maligna (multicéntrica, poco común). Los traumas son poco comunes. Incluyen laceraciones superficiales o lesiones severas del parénquima y los grandes vasos, ya sea por heridas penetrantes, atropellos, patadas o caídas. Puede existir ruptura esplénica. Se deben brindar cuidados de emergencia y, en caso de ser necesaria, realizar una esplenectomía parcial o total
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CUNIN, Olivier. "De Ta Prohm au Bayon, Analyse comparative de l'histoire architecturale des principaux monuments du style du Bayon." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2004. http://tel.archives-ouvertes.fr/tel-00007699.
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Cette étude a pour principal objectif l'élaboration de la chronologie relative du vaste programme architectural de Jayavarman VII dont le royaume englobait la totalité du Cambodge et une large partie de la Thaïlande à la fin du XIIe siècle. La construction de la chronologie générale des monuments dits du style du Bayon s'est appuyée sur une analyse archéologique des principaux temples de cette période complétée par une étude stylistique basée sur les travaux de Ph. Stern [Ph. Stern, 1965]. Ces résultats ont été complétés et partiellement validés par une étude archéométrique portant sur le comportement magnétique du grès, principal matériau constituant ces monuments.La chronologie locale et globale des monuments du style du Bayon a permis la mise au jour de quatre classes typologiques de temples régissant l'ensemble du programme architectural du Jayavarman VII. Il a été, de plus, possible de déduire quelles parties de celui-ci était exécutée dès 1191, date de consécration du Preah Khan d'Angkor. Cet essai de datation absolue des monuments du style du Bayon découle de l'analyse comparative de la chronologie relative de Ta Prohm et du Preah Khan d'Angkor avec leur description et la distribution de leur population divine qui en ont été faites dans les inscriptions de leur stèle respective.
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Espinosa, Sánchez Sebastián Antonio. "Evaluación de medidas hemostáticas locales postexodoncia bajo terapia anticoagulante oral mantenida en pacientes con INR bajo 4.0." Tesis, Universidad de Chile, 2004. http://www.repositorio.uchile.cl/handle/2250/110709.
Full textAbstract:
El manejo quirúrgico de pacientes bajo tratamiento anticoagulante oral ha estado por mucho tiempo determinado por la suspensión del fármaco 2 días antes del acto quirúrgico. La intención de este trabajo fue la de dejar en el pasado dicha metodología, manteniendo la terapia anticoagulante, realizando un examen de laboratorio previo para obtener el nivel de anticoagulación en que se encuentra el paciente y una vez realizada la exodoncia (no complicada), otorgar hemostasia con medios locales mecánicos. Según los resultados obtenidos, aparentemente sería un procedimiento seguro, tomando en cuenta que el único riesgo que se toma es el de un sangramiento post-operatorio, el cual puede ser controlado. Lo anterior es además corroborado por la literatura existente y permite al operador no enfrentar un posible evento Tromboembólico que pudiese ocurrir al suspender el tratamiento anticoagulante oral.
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Smart, Tracey Irene 1978. "Reproductive and Larval Biology of the Northeastern Pacific Polychaete Owenia collaris (Family Oweniidae) in Coos Bay, OR." Thesis, University of Oregon, 2008. http://hdl.handle.net/1794/9240.
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xiv, 154 p. : ill. A print copy of this title is available through the UO Libraries. Search the library catalog for the location and call number.The polychaete worm Owenia collaris (Family Oweniidae) is found in soft sediment habitats along the northeastern Pacific coast, particularly within bays and estuaries. Seasonally, these small tubeworms spawn gametes freely into the water column where they develop into planktotrophic mitraria larvae. After three to four weeks at ambient temperatures, they undergo a dramatic metamorphosis and return to the bottom. The reproductive and larval biology of a population of O. collaris in Coos Bay, OR was investigated over several years. The development of this polychaete has several unusual features, including a stomodeum not derived from the blastopore and continued proliferation of trochoblast descendents, producing simple cilia on monociliated cells. The description of larval and juvenile structures provided morphological characteristics useful for distinguishing this species from the congener O. fusiformis . The consequences of the unusual larval morphology of O. collaris (i.e. simple cilia, convoluted ciliated band) were investigated by comparing the feeding performance and growth of this species with those of invertebrate larvae representative of the more typical tornaria-type larval forms found in deuterostomes and trochophore-type larval forms found in the lophotrochozoa. Feeding and growth patterns were similar in the convergent mitraria and deuterostome larval forms. In an experiment designed to test the relationship between abiotic factors and the seasonal reproduction, the onset of breeding was cued by photoperiod, but seasonal trends in temperature, alkalinity, food availability for larvae, and salinity may drive reproductive patterns as well. Within the Coos Bay estuary, the intertidal distribution of O. collaris is related to adult salinity tolerances. Low salinity limits horizontal distribution and also reduces potential for reproduction. Most life-history stages are tolerant of a wide range of temperatures, both higher and lower than those typically seen in Coos Bay. There is little evidence to support the hypothesis that sediment characteristics limit distribution within the bay, although settling juveniles show some preference for small grain sizes and may not be able to recruit to mudflats that completely lack these size fractions.
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Jain, Mamta. "Hydraulics and stability of mulitple inlet-bay systems St. Andrew Bay, Florida /." [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE0000545.
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Thesis (M.S.)--University of Florida, 2002. "ABSRACT (cont.)": The linearized hydraulics model is shown to give good results--amplitudes of velocities and bay tides are within "plus or minus" 5 percent. The percent error for St. Andrew Bay is almost zero, and for the other bays it is within "plus or minus" 20 percent. The stability model gives the qualitative results. The bay area has a significant effect on the stability of the two inlets. At a bay area of 74 km2 (the actual area of the composite bay), both inlets are shown to be unstable. Increasing the area by 22% to 90 km2 stabilizes St. Andrew Bay Entrance, and by 42% to 105 km2 stabilizes East Pass as well. Keeping the bay area at 105 km2 and increasing the length of East Pass from 500 m to 2000 m destabilizes this inlet because as the length increases the dissipation in the channel increases as well.Title from title page of source document. Includes vita. Includes bibliographical references.
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Carr, Deborah Jacqueline. "Quaternary sediments of a tropical estuary and bay : Phangnga Bay, South Thailand." Thesis, University of Edinburgh, 1992. http://hdl.handle.net/1842/13320.
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Phangnga Bay is a 2000km2 shallow marine tropical embayment on the peninsula coast of South Thailand. The surrounding catchment area consists of Sn-bearing granites. Permian and Mesozoic sediments and Sn-rich pegmatites intruded in NE-SW trending fault systems. Grain size analysis of surface sediments reveals that mean grain size and sediment sorting show an overall increase southwards towards the more open marine environment. This is thought to reflect the transition from fine grained recent sediments presently settling out in the low energy sheltered conditions in the north to coarse relict sands in the south deposited during Pleistocene low sea-level stands and not covered by recent sedimentation. Geochemical analysis of the sediments reveals that the majority of elements studied (namely, Fe, Mn, AlP2O5, K, Rb, Nb, Y, Th, Pb, V, Cr, Zr, Nl, La, Ce Nb and Organic Carbon) are closely associated with clays through adsorption and cation exchange processes. These elements show concentration distributions which mirror that of the clay content. Sn, Zr and Tl when ratioed to Al, show highest values in the south of the area which is thought to reflect the concentration of these elements in heavy minerals which themselves are concentrated in the relict sands of the south. Both Sn and Rb show distributions strongly controlled by the distribution of cassiterite and lepidolite respectively in the catchment area. Both Mg and Sr show distributions partly controlled by clays and partly by carbonates. CaCO3 shows a general increase southwards reflecting improved conditions for carbonate-secreting organisms and a decrease in the diluting effect of terrigenous material. The carbonate mineralogy varies in relation to the biogenic content of the sediments. Kaolinite is the dominant clay mineral due to the intense chemical weathering of granites in the catchment area, however, clay mineral proportions change from north to south as a result of the variations in settling velocities of different clay minerals. The sediments of 8 depositional environments which have been distinguished on the basis of geomorphology and water depth are compared. Different techniques for distinguishing populations from the data are discussed particularly in relation to the 8 depositional environments mentioned above. From radiocarbon dates of core material sediment accumulation rates in the north of the Bay have been calculated and vary between 0.3 and 1.5mm/year. Progradation rates of the main mangrove development in the north of the Bay have been estimated at approximately 1.5m/year. From the study of cored material and the distribution of surface sediments it is concluded that Holocene sedimentation in Phangnga Bay represents a regressive, fining-upward sequence. Comparisons are made between this model of sedimentation in Phangnga Bay and possible analogues in the geological record.
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Bretschneider, Lisa [Verfasser], Martin [Akademischer Betreuer] Frank, and Germain [Gutachter] Bayon. "South Asian monsoon induced weathering and erosion inputs into the Bay of Bengal during the Miocene : Evidence from clay radiogenic isotope compositions / Lisa Bretschneider ; Gutachter: Germain Bayon ; Betreuer: Martin Frank." Kiel : Universitätsbibliothek Kiel, 2020. http://d-nb.info/1227301650/34.
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Clarke, Philip. "Botany Bay Penal Settlement." Thesis, Halmstad University, School of Humanities (HUM), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-1030.
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Lieutenant James Cook claimed New South Wales for Great Britain in 1770. However, it was not until 1786 that a settlement was authorised there. The settlement was not for free men, but the for the unwanted convicts, their masters and protectors; the First Fleet convicts landed at Sydney Cove on January 26, 1788 and Governor Phillip lay claim officially to the country.
The decision to establish a settlement in New South Wales took sixteen years. It was not the clear-cut and positive beginning to a country that it could have been.
The emphasis of this report is to look at the factors that contributed to the decision and the line that the decision makers took. This has involved investigation of parliamentary debates, ministers’ letters and other sources relevant to the decision. The factors most pressing at the time for the government were the over abundance of criminals and the budget deficit. With a relatively simple move, Lord Sydney was able to relieve the first problem at the same time as his Prime Minister, William Pitt, took on the budget. It is clear that the settlement was established for the dubious benefit of relieving England of the convicts.
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金潤賓 and Jun-ping Christopher King. "Repulse bay commerical redevelopment." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31982864.
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