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Haugen, Emily A. "Magmatic Evolution of Early Subduction Zones: Geochemical Modeling and Chemical Stratigraphy of Boninite and Fore Arc Basalt from the Bonin Fore Arc." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/5934.
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The Izu-Bonin-Mariana arc stretches south from Japan to Guam in the Western Pacific. International Ocean Discovery Project Expedition 352 drilled four core in the fore arc of the Izu-Bonin arc east of the Bonin Islands: U1439C, U1440B, U1441A, and U1442A. From the four core, 124 samples were retrieved and analyzed for major and trace elements. Two main rock types were identified: FAB and boninite. FAB is a Mid-Ocean Ridge Basalt (MORB)-like tholeiite with variable fluid mobile element enrichment such as Rb, Ba, and Sr, and low Ti/V ratios more similar to an island arc volcanic than a mid-ocean ridge volcanic. Boninite is a hydrous high-Mg andesite with low TiO2 and distinctive subduction zone characteristics in the form of elevated fluid mobile elements and melt mobile elements. FAB was assumed to be formed from a Depleted MORB-Mantle (DMM) source and the boninite was formed from a depleted mantle source, presumably the mantle after FAB melt was extracted. Here, we used the Rare Earth Elements (REE) of the samples to model melt scenarios for the FAB and boninite in order to better understand the initial volcanic product of subduction zones.
This research was funded by in joint by the National Science Foundation, Consortium for Ocean Leadership, and International Ocean Discovery Program. 124 samples were analyzed using an X-Ray Fluorescence (XRF) and Inductively Coupled Plasma - Mass Spectrometer (ICP-MS) to determine the major and trace elements. These analyses were then used to recreate the chemostratigraphy defined by the shipboard crew and determine variations within the core. We found that there was variability as the magma evolved over time and mixed with other melts, seen in magma mixing horizons. Boninite samples were separated based on their SiO2 and MgO concentrations into Basaltic Boninite (BB), Low-Silica Boninite (LSB), and High-Silica Boninite (HSB) with BB being more primitive and HSB being more evolved.
These volcanics are the first known products of the subduction zone and were used to model the early evolution of the subduction zone. FAB was the first product due to its proximity to the trench and greater age than the boninite. Assumed to be generated from DMM, FAB was modeled with a total melt extraction of ~20% spinel lherzolite and 1% garnet lherzolite. Boninite was assumed to be generated from the FAB residue because it requires a depleted source and because the FAB residue was within the hydrous flux melt zone of the subduction factory. Boninite was modeled at high degree of melt from the FAB residue, however an additional melt must be added to the model to match the observed samples. We proposed a small fraction of FAB melt mixed with the models because it is still present in the subduction factory, observed in core U1439C with a FAB sample in the HSB regime.
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Holbik, Sven P. "Arc Crust-Magma Interaction in the Andean Southern Volcanic Zone from Thermobarometry, Mineral Composition, Radiogenic Isotope and Rare Earth Element Systematics of the Azufre-Planchon-Peteroa Volcanic Complex, Chile." FIU Digital Commons, 2014. http://digitalcommons.fiu.edu/etd/1524.
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The Andean Southern Volcanic Zone (SVZ) is a vast and complex continental arc that has been studied extensively to provide an understanding of arc-magma genesis, the origin and chemical evolution of the continental crust, and geochemical compositions of volcanic products. The present study focuses on distinguishing the magma/sub-arc crustal interaction of eruptive products from the Azufre-Planchon-Peteroa (APP 35°15’S) volcanic center and other major centers in the Central SVZ (CSVZ 37°S - 42°S), Transitional SVZ (TSVZ 34.3-37.0°S), and Northern SVZ (NSVZ 33°S - 34°30’S). New Hf and Nd isotopic and trace element data for SVZ centers are consistent with former studies that these magmas experienced variable depths of crystal fractionation, and that crustal assimilation is restricted to the lower crustal depths with an apparent role of garnet. Thermobarometric calculations applied to magma compositions constrain the depth of magma separation from mantle sources in all segments of the SVZ to(70-90 km). Magmatic separation at the APP complex occurs at an average depth of ~50 km which is confined to the mantle lithosphere and the base of the crust suggesting localized thermal abrasion both reservoirs. Thermobarometric calculations indicate that CSVZ primary magmas arise from a similar average depth of (~54 km) which confines magma separation to the asthenospheric mantle. The northwards along-arc Sr-Nd-Hf isotopic data and LREE enrichment accompanied with HREE depletion of SVZ mafic magmas correlates well with northward increasing crustal thickness and decreasing primary melt separation from mantle source regions indicating an increased involvement of lower crustal components in SVZ magma petrogenesis.
The study concludes that the development of mature subduction zones over millions of years of continuous magmatism requires that mafic arc derived melts stagnate at lower crustal levels due to density similarities and emplace at lower crustal depths. Basaltic underplating creates localized hot zone environments below major magmatic centers. These regions of high temperature/partial melting, and equilibration with underplated mafic rocks provides the mechanism that controls trace element and isotopic variability of primary magmas of the TSVZ and NSVZ from their baseline CSVZ-like precursors.
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Desmet, Alain. "Ophiolites et séries basaltiques crétacées des régions caraïbes et nordandines : bassins marginaux, dorsales ou plateaux océaniques ?" Nancy 1, 1994. http://www.theses.fr/1994NAN10313.
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Les régions caraïbes et nordandines comportent, au crétacé, des séries magmatiques basiques, volcaniques ou ophiolitiques. L'étude petrologique analytique (majeurs, traces, terres rares, microsonde) de quelques séries du Costa Rica, de Colombie et d'Équateur, a permis leur identification magmatique et dynamique. La comparaison des laves à certaines séries volcaniques océaniques actuelles a conduit à une réinterprétation magmatique et géodynamique globale. Au Costa Rica, la péninsule de Santa Elena est formée d'une large nappe ophiolitique tholeiitique avec péridotites, cumulats gabbroiques et dolerites diverses (n-morb). Les iles Murcielago sont couvertes de ferrobasaltes t-morb. Santa Elena représente un témoin de croute océanique crétacée mis en place vers 70 ma et Murcielago un lambeau de plateau océanique soudé à l'Amérique centrale. La Colombie offre, au crétacé, et du nord au sud de la cordillère occidentale, un large éventail de formations océaniques: la série du Boqueron de Toyo, à volcanisme basaltique et intrusions diorito-tonalitiques (92 ma) témoigne du fonctionnement d'un arc insulaire immature. La série d'Altamira, a cumulats gabbroiques et basaltes primitifs illustre l'ouverture vers 80 ma d'un bassin en arrière de l'arc précédent. Le massif de Bolivar, correspond, avec ses cumulats tholeiitiques (i ou iia), a la croute océanique. La coupe de Buenaventura a Buga, avec ses nappes empilées riches en sédiments océaniques et en basaltes de type t-morb évoque des terrains constitués en plateau océanique et accrétés à la marge sud-américaine. En Équateur, le crétacé supérieur de la cordillère occidentale offre une situation analogue: des lambeaux de croute océanique sont dispersés le long d'une grande suture ophiolitique oblitérée par l'arc volcanique de Macuchi. La série de la Quebrada San Juan est l'équivalent de celle de Bolivar. Les basaltes (t-morb) du Grupo Pinon de la cote correspondent aussi à du matériel de plateau océanique accrété au bâti sud-américain
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Saal, Alberto Edgardo. "Petrology and geochemistry of intra-back arc basalts from the Argentine Andes." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/57753.
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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1994.Includes bibliographical references (leaves 50-63).
by Alberto Edgardo Saal.
M.S.
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O'Leary, Julie Ann Asimow Paul David. "Hydrogen isotope geochemistry of the mantle : constraints from back arc basin basalts and mantle xenoliths /." Diss., Pasadena, Calif. : California Institute of Technology, 2007. http://resolver.caltech.edu/CaltechETD:etd-12182006-072449.
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Bouvier, Anne-Sophie. "Etude des magmas primaires de l'arc des Petites Antilles par l'analyse in situ des inclusions vitreuses." Thesis, Nancy 1, 2008. http://www.theses.fr/2008NAN10071/document.
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Les laves de l’arc des Petites Antilles présentent une large gamme de compositions le long de l'arc et au sein d'un même centre volcanique. De précédentes études ont montré une variation de l'influence des fluides issus de la plaque océanique subductée le long de l’arc et au sein d’une même île. Cependant, la nature des fluides et l'importance de leurs contributions sont encore débattues. Afin d'apporter de nouvelles contraintes sur les conditions de genèse des magmas ainsi que sur l'influence et la nature des fluides issus du slab, des scories magnésiennes provenant de St. Vincent et Grenade, situées au sud de l’arc, ont été utilisés. Les compositions en éléments légers, traces et isotopes stables ont été déterminées par sonde ionique dans les inclusions vitreuses piégées dans les olivines, donnant un accès direct aux compositions des magmas primitifs, non affectés par les processus superficiels. La combinaison des différentes mesures a permis de mettre en évidence l’influence de trois sortes de fluides sur les sources mantelliques : 1- un fluide de compositions proche de celle de l’eau de mer, probablement relâché lors de la déshydratation du manteau serpentinisé entraîné en profondeur par le slab, 2- des fluides de déshydratation de la croûte océanique subductée et 3- des fluides issus de la déshydratation des sédiments. Ces fluides aqueux montrent des concentrations différentes en éléments dissous, reflétant la profondeur à laquelle ils sont extraits. L’ensemble des données révèle une genèse des magmas à plus forte profondeur et plus faible taux de fusion (7-15%) à Grenade, ceux de St. Vincent étant extraits à 1190-1220°C et 13-14 kbar avec un taux de fusion de 10-20%The Lesser Antilles arc lavas display a large range of compositions. Previous studies have suggested a variable influence of fluids derived from the subducted oceanic lithosphere along the arc and within individual islands. The fluid contributions and their nature are still a matter of debate. In order to bring new constraints on magmagenesis conditions and on the influence and nature of fluids from the slab on the mantle source, high magnesia scoriae from St. Vincent and Grenada, in the south of the arc, have been used. Different analyses (light and trace elements, ?D, ??Li, ?11B, ?18O, ?34S) have been performed on olivine-hosted melt inclusions, using ion probe. Their study gives a direct access to the primitive magma compositions as yet unaffected by superficial processes. The association of several measurements permit three types of fluid components to be highlighted: 1- a seawater-like fluid, probably released by serpentinized mantle dehydration when it is pulled down by the slab, 2- fluids deriving from altered oceanic crust dehydration and 3- fluids issued from sediment dehydration. These aqueous fluids have different solute contents, reflecting their extraction depths. This dataset suggest a deeper genesis and lower partial melting rate (7-15%) for Grenada melts, St. Vincent melts being generated at 1190-1220°C, 13-14 kbar, from 10-20% partial melting
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Nguyen, Tan. "Load transfer mechanisms and seismic stability of embankments subjected to basal subsidence." Kyoto University, 2018. http://hdl.handle.net/2433/235077.
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Silva, Leovandes Soares da. "Din?mica da comunidade arb?rea em fitofisionomias de cerrado e floresta estacional semidecidual em Curvelo ? MG." UFVJM, 2016. http://acervo.ufvjm.edu.br/jspui/handle/1/1341.
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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)
Este trabalho teve como objetivo avaliar mudan?as flor?sticas e estruturais da comunidade e popula??es arb?reas em fitofisionomias de Cerrado e Floresta Estacional Semidec?dual. A ?rea de estudo se encontra situada na Fazenda Experimental do Moura, em Curvelo-MG (Cerrado stricto sensu ? CSS ? 18,84? S e 44,39? W; Cerrad?o ? CD ? 18?82?S e 44?25? W; e Floresta Estacional Semidecidual ? FES ? 18?45?S e 45? 25?W), o clima ? do tipo Aw de K?ppen e se encontra sobre substrato de Latossolos ?cidos e distr?ficos. Um primeiro invent?rio foi realizado no CSS e CD em 2010, quando foram identificados, medidos todos os indiv?duos vivos com di?metro altura do solo (DAS) ? 5,0 cm, a 0,30 m de altura do solo. J? para a FES, o primeiro invent?rio ocorreu em 2011 e foram medidos di?metros e identificados todos os indiv?duos vivos com di?metro altura do peito (DAP) ? 5,0 cm. O segundo invent?rio de todas as fitofisionomias foi realizado em 2015, foram adotados os mesmos crit?rios do invent?rio anterior, sendo remedidos os sobreviventes, registrados mortos e indiv?duos que atingiram o di?metro m?nimo de inclus?o no segundo invent?rio (recrutas) receberam placas com numera??o e foram identificados e mensurados. Em cada parcela de cada fitofisionomia foram coletados vari?veis ambientais para an?lises de correla??o de Pearson (vegeta??o e ambiente). Foram realizadas an?lises de din?mica flor?stica, estrutural e das popula??es mais abundantes, todas as esp?cies foram classificadas quanto ao status de conserva??o, densidade da madeira e dispers?o de sementes. No CSS, houve perda de uma ?nica esp?cie Zeyheria montana. As fam?lias com mais representantes Fabaceae com 13 esp?cies no primeiro invent?rio e 13 esp?cies no segundo invent?rio respectivamente, seguidos de: Bignoniaceae (6 e 5), Vochysiaceae (5 e 5) e Malpighiaceae (4 e 4), respectivamente. J? no CD, foram contabilizados (36 e 34) fam?lias, (74 e 69) g?neros (100 e 90) e esp?cies para o primeiro e segundo invent?rio nessa sequ?ncia, houve perda de 11 esp?cies e ganho de uma. As fam?lias mais representativas Fabaceae (15 e 14), Rubiaceae (8 e 8), Myrtaceae (7 e 5) e Bignoniaceae (7 e 7). Houve perda de duas fam?lias Siparunaceae e Opiliaceae. No entanto, na FES n?o houve mudan?as na riqueza de fam?lias (43), j? as esp?cies (132 e 129) perderam cinco e ganharam duas esp?cies. As fam?lias com mais esp?cies eram Fabaceae (21 e 20), Myrtaceae (14 e 12), Lauraceae e Meliaceae (9 e 9) e Rubiaceae (8 e 8), respectivamente. As taxas de mortalidade foram superiores as taxas de recrutamento nas tr?s fitofisionomias, no CSS (mortalidade de 2,13% ano-1 e recrutamento de 1,13% ano-1), seguindo essa mesma sequ?ncia para as outras fitofisionomias, no CD (8,84 e 1,18% ano-1) e FES (2,54 e 1,03% ano-1), respectivamente. Entre o primeiro e segundo invent?rio, houve acr?scimo de ?rea basal no somente no CSS. De maneira geral, os padr?es de din?mica foram mais acelerados nas popula??es do CD, onde visualmente os dist?rbios foram maiores, indicando que dependendo dos intervalos entre os dist?rbios, isso pode colocar em risco o estabelecimento de novos indiv?duos e o futuro das esp?cies.
Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016.
This work aimed to evaluate the floristic and structural changes at the level of community and tree populations in physiognomies of cerrado and semideciduous seasonal forest. The study area is situated on the Experimental Farm of the Moorish in Curvelo - MG (Cerrado sensu stricto ? CSS ? 18.84? S and 44.39? W; Cerrad?o ? CD ? 18? 82?S and 44? 25?? W; and semideciduous seasonal Forest ? FES - 18? 45' S and 45? 25' W, average elevation of 715 m), the climate and the type K?ppen Aw and about presence of Microaggregates substrate acidic and dystrophic. A first inventory was conducted in the CSS and CD in 2010 where they were identified, measured and estimated time, for all individuals living with (diameter 0.30 m height from the ground) (DAS) ? 5.0cm. To the FES, the first inventory occurred in 2011 and were measured diameters and identified all individuals living with diameter breast height (dbh) ? 5.0 cm. The second inventory of all physiognomies was held in 2015, and the same criteria were adopted in the previous inventory, being remeasured survivors, recorded dead and individuals who have attained the minimum diameter for inclusion in the second inventory (recruits) received plates with numbering and were identified and measured. On each plot of each phytophysiognomy, environmental variables were collected for analysis of correlation (vegetation and environment). Dynamic analyses were performed, structural and floristic most abundant populations, all species were classified as conservation status, wood density and seed dispersal. In CSS, loss of a single species Zeyheria montana. Families with more representatives Fabaceae (13 and 13), Bignoniaceae (6 and 5), Vochysiaceae (5 and 5) and Malpighiaceae (4 and 4).In the cd, accounting for families (36 and 34), genres (74 and 69) and species (100 and 90), there were 11 species loss and gain a. The most representative families fabaceae (14 and 15), rubiaceae (8 and 8), myrtaceae (7 and 5) and bignoniaceae (7 and 7). Loss of two families Siparunaceae and Opiliaceae. While in FES, don't listen to changes in family wealth (43), species (132 and 129) lost five and won two species. Families Fabaceae species (20 and 21), Myrtaceae (14 and 12), Lauraceae and Meliaceae (9 and 9) and Rubiaceae (8 and 8) respectively. Mortality rates were higher than the rates of recruitment in the three physiognomies, in CSS (2.13 and 1.13%. year-1), CD (8.84 and 1.18%. year-1) and FES (2.54 and 1.03% year-1) respectively. Mortality rates were higher than the rates of recruitment in the three physiognomies, in CSS (2.13 and 1.13%. year-1), CD (8.84 and 1.18%. year-1) and FES (2.54 and 1.03% year-1) respectively. Between the first and second inventory, there was an increase of basal area in CSS only. In General, dynamic patterns were more rapid in populations of the CD, where visually the disturbances were greater, indicating that depending on the intervals between the disturbances, it can jeopardize the establishment of new individuals and the future of the species.
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Moretti, Helena Concetta. "From slab to surface : geochemical evolution and modification of Island Arc Basalts : evidence from the eruptions of the Pollara depression, Salina, Italy." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.702883.
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Fabre, Pascale. "Les Bordures figées des filons basaltiques de l'Escandorgue-Lodevois : minéralogie, expérimentation et approche théorique /." Montpellier : Centre géologique et géophysique de Montpellier, 1988. http://catalogue.bnf.fr/ark:/12148/cb34991718k.
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Lachenbruch, Charles. "A Study of Lean Body Mass in Estimating Basal Metabolic Rate." Thesis, North Texas State University, 1985. https://digital.library.unt.edu/ark:/67531/metadc503992/.
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The primary purpose of the study was to determine if measured LBM could be used as a more powerful predictor of BMR than could surface area (SA) as calculated by the formula of DuBois and DuBois (1916). It was also of interest to develop a prediction equation for BMR using multiple regression analysis. Data from 82 women and 76 men were included in the study. Pearson product-moment correlations indicated that LBM was a better predictor for BMR than SA on either of the principal SA prediction equations, those of Aub and DuBois (1917) and Harris and Benedict (1919). Age, sex, and fat weight were not found to contribute significantly to prediction when included by multiple regression analyses. Linear equations for BMR as a function of LBM were developed for each sex. Tables based on these equations were also generated as a quick reference for clinicians.
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González, Morales Victoria. "Diseño de un sistema de costeo basado en actividades para unidades de hospitalización pediátrica." Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/149735.
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TESIS PARA OPTAR AL GRADO DE MAGÍSTER EN CONTROL DE GESTIÓNActualmente las organizaciones deben hacer frente a múltiples cambios del entorno, es cada vez más común recibir nuevas demandas de los usuarios, evaluar cambios en los servicios de suministros, y sucumbir frente a las mejoras tecnológicas de la competencia, etc. Para poder adaptarse exitosamente a estos desafíos es fundamental que las organizaciones cuenten con sistemas de gestión, sistemas de información y procesos bien definidos y robustos. En particular los Hospitales surgen como organizaciones especialmente complejas, ya que desde un punto de vista productivo su input y output son los pacientes. En este sentido el desarrollo de herramientas de gestión, mejora de procesos y gestión de la calidad, son esenciales para una correcta ejecución de la estrategia. El conocimiento de las actividades y los costos es de suma importancia para los tomadores de decisiones. Los recursos empleados en estas organizaciones son también de alta complejidad, por lo que es importante saber el costo del personal, costo tecnológico y costo médico clínico. Finalmente, una eficaz gestión de costos puede aportar valor económico que es lo que la organización requiere para incrementar su eficiencia. El objetivo de este trabajo es precisamente ese, entregar información relevante en cuanto a la adecuación de los sistemas de costeo basados en actividades a la realidad de gestión de costos hospitalarios en Chile, mediante el diseño de un sistema ABC en el área de hospitalización pediátrica básica y media del Hospital de La Florida ubicado en la región metropolitana. Cabe destacar que este trabajo se llevó a cabo en el contexto del proyecto FONDEF IT13I10003, "ABC Salud: Una herramienta para el mejoramiento de la gestión y valoración de prestaciones en hospitales públicos", marco que permitió guiar en parte importante este trabajo. Para lograr este objetivo, en el Capítulo I se definen los principales lineamientos de la tesis, así también como las principales limitaciones de la misma. En el segundo Capítulo se presenta un marco teórico para esta investigación, en el cual se exponen variados argumentos presentados por diversos autores que han generado investigaciones similares en el pasado, sus estudios indican que el costeo basado en actividades es un sistema de gestión de costos adecuado para empresas privadas y públicas, así también como para instituciones de salud, debido a que son sistemas flexibles y que entregan información valiosa y detallada para la administración de recursos. En el Capítulo III se señala cual es la metodología que se aplicará a los hospitales bajo estudio para obtener los resultados, aquí además se detallan las características más importantes de este sistema de asignación de costos. Más adelante en el Capítulo IV se procede a realizar la aplicación del sistema de costeo propuesto, para lo cual se debieron identificar los recursos, las actividades y los servicios finales que se quieren costear. Para realizar esta implementación se analizó ampliamente la información facilitada por el personal administrativo del hospital. En el Capítulo V se recogen los resultados finales de este trabajo, presentando también análisis comparativos de los costos de cada producto, además de la discusión de resultados. Finalmente se presentan las conclusiones generales en donde se responden las preguntas guías de esta investigación, y se señalan futuras investigaciones y aplicaciones que pueden ser ejecutadas a partir de los hallazgos expuestos en este trabajo.
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Rodrigues, Nuno Vicente. "Caso de Glomerulonefrite Rapidamente Progressiva Associada a ANC - MPO e Imunofluorescência Linear com Ausência de Anticorpo Anti-membrana Basal." Master's thesis, Instituto de Ciências Biomédicas Abel Salazar, 2009. http://hdl.handle.net/10216/53354.
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Rodrigues, Nuno Vicente. "Caso de Glomerulonefrite Rapidamente Progressiva Associada a ANC - MPO e Imunofluorescência Linear com Ausência de Anticorpo Anti-membrana Basal." Dissertação, Instituto de Ciências Biomédicas Abel Salazar, 2009. http://hdl.handle.net/10216/53354.
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Fabbri, Mattia. "Generatore di entropia basato su dinamica caotica con interfaccia usb." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7034/.
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È impossibile implementare sorgenti autenticamente casuali su hardware digitale. Quindi, storicamente, si è fatto ampio uso di generatori di numeri pseudo-casuali, evitando così i costi necessari per la progettazione di hardware analogico dedicato. Tuttavia, le sorgenti pseudo-casuali hanno proprietà (riproducibilità e periodicità) che si trasformano in vulnerabilità, nel caso in cui vengano adottate in sistemi di sicurezza informatica e all’interno di algoritmi crittografici. Oggi la richiesta di generatori di numeri autenticamente casuali è ai suoi massimi storici. Alcuni importanti attori dell’ICT sviluppato proprie soluzioni dedicate, ma queste sono disponibili solo sui sistemi moderni e di fascia elevata. È quindi di grande attualità rendere fruibili generatori autenticamente casuali per sistemi già esistenti o a basso costo. Per garantire sicurezza e al tempo stesso contenere i costi di progetto è opportuno pensare ad architetture che consentano di riusare parti analogiche già disponibili. Particolarmente interessanti risultano alcune architetture che, grazie all’utilizzo di dinamiche caotiche, consentono di basare buona parte della catena analogica di elaborazione su ADC. Infatti, tali blocchi sono ampiamente fruibili in forma integrata su architetture programmabili e microcontrollori. In questo lavoro, si propone un’implementazione a basso costo ed elevata flessibilità di un architettura basata su un ADC, inizialmente concepita all’Università di Bologna. La riduzione di costo viene ottenuta sfruttando il convertitore già presente all’interno di un microcontrollore. L’elevata flessibilità deriva dal fatto che il microcontrollore prescelto mette a disposizione una varietà di interfacce di comunicazione, tra cui quella USB, con la quale è possibile rendere facilmente fruibili i numeri casuali generati. Quindi, l’intero apparato comprende solo un microcontrollore e una minima catena analogica di elaborazione esterna e può essere interfacciato con estrema facilità ad elaboratori elettronici o sistemi embedded. La qualità della proposta, in termini di statistica delle sequenze casuali generate, è stata validata sfruttando i test standardizzati dall’U.S. NIST.
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Bevini, Giorgia. "Studio di un pilota automatico per aereo basato su Artificial Neural Network." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
Find full textAbstract:
La tesi si avvia con una prima analisi sull'autopilota attualmente in dotazione sui velivoli, del quale si vanno a individuare le funzionalità e gli algoritmi di sviluppo, con i relativi limiti. Queste limitazioni possono essere superate attraverso un nuovo approccio progettuale: le reti neurali artificiali. Quest'ultime andranno a modellare un nuovo autopilota, detto intelligente.
Si analizza la struttura delle reti neurali e come esse si addestrano per andare a creare un nuovo sistema di controllo del volo. Successivamente si vanno ad osservare i risultati di uno studio basato sull'addestramento di un prototipo di autopilota intelligente, creato attraverso l'impiego di un numero ridotto di neuroni e con un database ristretto.
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Rito, Jorge Manuel Gonçalves. "A Selecção em andebol : Um Estudo no Académico Basket Club (ABC), nas categorias infantis, iniciados e juvenis." Master's thesis, Universidade do Porto. Reitoria, 2000. http://hdl.handle.net/10216/9985.
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Dissertação de Mestrado em Ciência do Desporto, área de especialização em Treino de Alto Rendimento Desportivo, apresentada à Faculdade de Ciências do Desporto e de Educação Física da Universidade do PortoObjectivo: O presente estudo pretende analisar a estrutura conceptual e operativa do processo selectivo dos treinadores dos escalões de infantis, iniciados e juvenis do A.B.C. e caracterizar o jovem andebolista nos intervalos etários de 10-12 anos, 13-14, anos e 15-16 anos. Metodologia: Foram observados 88 atletas de idade cronológica compreendida entre os 10 e os 16 anos, praticantes de andebol no A.B.C., de diferentes escalões competitivos: infantis (n=25), iniciados (n=34) e juvenis (n=29). O estudo realizou-se relativamente aos seguintes factores de performance: 1. Antropométricos foram efectuadas 23 medições corporais, incluindo, além da altura e do peso, comprimentos, diâmetros, perímetros e pregas de adiposidade subcutânea.2. Composição corporal e somatótipo.3. Condicionais Foram realizados testes de A.F.G. e A.F.E. a partir das baterias de "AAHPER" , "EUROFIT" e Seco e Maldonado.4. Força explosiva A avaliação da força explosiva foi efectuada de acordo com o protocolo descrito por Bosco et.al.5. Habilidades Específicas A avaliação das Habilidades Específicas no andebol realizou-se a partir do circuito elaborado por Seco e Maldonado.Foi pedido aos treinadores (n=5), a partir dos questionários, que classificassem e ordenassem os factores de rendimento, que avaliassem os indicadores de selecção e caracterizassem os jogadores por posição específica.Foram utilizados os seguintes procedimentos estatísticos: coeficiente de correlação intra-classe, para calcular as estimativas de fiabilidade; análise de variância, para estudar as médias para os diferentes indicadores entre categorias.Conclusões: (1) Os treinadores do A.B.C. partilham a mesma estrutura conceptual quanto à importância e hierarquia dos factores de rendimento e relativamente a um conjunto de indicadores de selecção; (2) os três grupos de andebolistas estudados apresentam perfis configuracionais distintos na maioria dos items considerados; (3) a selecção no A.B.C. pode ser expli ...
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Rito, Jorge Manuel Gonçalves. "A Selecção em andebol : Um Estudo no Académico Basket Club (ABC), nas categorias infantis, iniciados e juvenis." Dissertação, Universidade do Porto. Reitoria, 2000. http://hdl.handle.net/10216/9985.
Full textAbstract:
Dissertação de Mestrado em Ciência do Desporto, área de especialização em Treino de Alto Rendimento Desportivo, apresentada à Faculdade de Ciências do Desporto e de Educação Física da Universidade do PortoObjectivo: O presente estudo pretende analisar a estrutura conceptual e operativa do processo selectivo dos treinadores dos escalões de infantis, iniciados e juvenis do A.B.C. e caracterizar o jovem andebolista nos intervalos etários de 10-12 anos, 13-14, anos e 15-16 anos. Metodologia: Foram observados 88 atletas de idade cronológica compreendida entre os 10 e os 16 anos, praticantes de andebol no A.B.C., de diferentes escalões competitivos: infantis (n=25), iniciados (n=34) e juvenis (n=29). O estudo realizou-se relativamente aos seguintes factores de performance: 1. Antropométricos foram efectuadas 23 medições corporais, incluindo, além da altura e do peso, comprimentos, diâmetros, perímetros e pregas de adiposidade subcutânea.2. Composição corporal e somatótipo.3. Condicionais Foram realizados testes de A.F.G. e A.F.E. a partir das baterias de "AAHPER" , "EUROFIT" e Seco e Maldonado.4. Força explosiva A avaliação da força explosiva foi efectuada de acordo com o protocolo descrito por Bosco et.al.5. Habilidades Específicas A avaliação das Habilidades Específicas no andebol realizou-se a partir do circuito elaborado por Seco e Maldonado.Foi pedido aos treinadores (n=5), a partir dos questionários, que classificassem e ordenassem os factores de rendimento, que avaliassem os indicadores de selecção e caracterizassem os jogadores por posição específica.Foram utilizados os seguintes procedimentos estatísticos: coeficiente de correlação intra-classe, para calcular as estimativas de fiabilidade; análise de variância, para estudar as médias para os diferentes indicadores entre categorias.Conclusões: (1) Os treinadores do A.B.C. partilham a mesma estrutura conceptual quanto à importância e hierarquia dos factores de rendimento e relativamente a um conjunto de indicadores de selecção; (2) os três grupos de andebolistas estudados apresentam perfis configuracionais distintos na maioria dos items considerados; (3) a selecção no A.B.C. pode ser expli ...
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Antiochos, Grégoire Loukáki Marína. "Éloge du patriarche Basile Kamatèros /." Paris : Université de Paris I, 1996. http://catalogue.bnf.fr/ark:/12148/cb35826175g.
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Moro, Anna L. "Aspects of old Neapolitan : the language of Basile's "Lo cunto de li cunti /." Muenchen [sic] : Lincom Europa, 2003. http://catalogue.bnf.fr/ark:/12148/cb40064396c.
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Martin, Béatrice. "Etude détaillée de la solidification d'un filon de basalte alcalin du Lodévois." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37607837m.
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Dautria, Jean-Marie. "Relations entre les hétérogénéités du manteau supérieur et le magmatisme en domaine continental distensif : exemple des basaltes alcalins du Hoggar, Sahara central, Algérie et de leurs enclaves /." Montpellier : Centre géologique et géophysique de l'Université des sciences et techniques du Languedoc, 1988. http://catalogue.bnf.fr/ark:/12148/cb36148832z.
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Hamelin, Cédric. "Géochimie isotopique du lithium dans les basaltes - Géochimie des MORBs du Pacifique Sud." Phd thesis, Université de Bretagne occidentale - Brest, 2008. http://tel.archives-ouvertes.fr/tel-00344949.
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Ce travail est constitué de deux volets indépendants qui s'intéressent respectivement à la géochimie isotopique du lithium et à la variabilité géochimique des MORB du Pacifique sud. L'utilisation des isotopes du lithium en Sciences de la Terre est abordée dans un premier temps au travers de l'étude des laves de la Chaîne des Puys. Les échantillons de cette série volcanique intraplaque permettent d'apporter des contraintes sur les valeurs de la composition isotopique du Li dans la croûte continentale inférieure et dans le manteau d'affinité HIMU sous le Massif Central. La deuxième étude s'intéresse au comportement du Li lors du refroidissement d'une lave. Pour cela, des analyses in situ de la composition isotopique du Li ont été réalisé au travers de phénocristaux d'olivine d'un échantillon de picrite. Ces mesures ont permis de mettre en évidence un processus de fractionnement isotopique dû à la diffusion du Li dans les cristaux. Le deuxième volet de ce travail présente les résultats de la campagne océanographique PACANTARCTIC2. L'analyse des rapports d'éléments en traces et de la composition isotopique des isotopes radiogéniques (Sr, Nd, Pb et Hf) dans les basaltes collectés entre 53°S et 39°S le long de la dorsale Pacifique-Antarctique, permet d'étudier la variabilité des basaltes de dorsale loin de tout point-chaud. Cette étude mets en évidence différentes échelles d'hétérogénéités géochimiques dans la source de ces MORB. Ces variations le long de l'axe correspondent aux différents types de segmentation de la dorsale.
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Pascual, Molto Marcos. "Técnicas de control robusto basado en modelo de referencia aplicadas a sistemas modulares de alimentación." Doctoral thesis, Universitat Politècnica de València, 2008. http://hdl.handle.net/10251/1981.
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Los sistemas de conversión conectados en paralelo constituyen una solución interesante al problema de proporcionar una tensión regulada a una carga que demanda corrientes elevadas, pues la paralelización de convertidores permite distribuir la corriente entre los diversos módulos, reduciendo el estrés sobre los interruptores y mejorando la fiabilidad del
sistema.
En sistemas multimodulares de convertidores se necesita normalmente un esquema de control modo corriente, como el control modo corriente media (ACC en inglés), que asegure una correcta compartición de corriente entre los distintos módulos.
Con este tipo de control, las características dinámicas del lazo de control dependen considerablemente de las
condiciones de línea y carga, así como del número de módulos conectados en paralelo.
En esta tesis se han aplicado dos técnicas diferentes de control robusto basado en modelo de referencia (RMF en inglés) a sistemas de conversión en paralelo con el fin de mejorar la robustez del control ACC convencional. El trabajo realizado puede dividirse en tres grandes bloques:
En primer lugar, se ha presentado un esquema de control RMF paso-alto que ha sido aplicado al lazo de tensión de un
convertidor DC-DC multimodular tipo Buck. El esquema de control propuesto añade un lazo interno adicional a los lazos de corriente y de tensión del control ACC convencional, reduciendo la sensibilidad del lazo externo de tensión frente a los
parámetros variables de la etapa de potencia: número de módulos, tensión de entrada, carga y tolerancias de los componentes.
Además, el lazo mejora considerablemente el rechazo de perturbaciones del convertidor, esto es, impedancia de salida y
audiosusceptibilidad en lazo cerrado, en baja frecuencia si se compara con el control ACC convencional.
La principal limitación de este esquema de control es que su funcionamiento está limitado por el rizado de conmutación
presente en la tensión de salida, dado que se utiliza un regulador auxiliar......Pascual Molto, M. (2008). Técnicas de control robusto basado en modelo de referencia aplicadas a sistemas modulares de alimentación [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/1981
Palancia
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Lebeau, Marie-José. "Matériaux vitreux et vitrocristallins basaltiques contenant des cendres radioactives simulées : comportement à la lixiviation /." Montpellier : Centre géologique et géophysique de Montpellier, 1988. http://catalogue.bnf.fr/ark:/12148/cb34962236r.
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Fan, Bo Tao. "Approche physico-chimique des propriétés des membranes basales." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376049375.
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Le, Voyer Marion. "Rôle des fluides dans la genèse des magmas d'arcs : analyses in situ des éléments volatils et des isotopes du bore dans les inclusions magmatiques des olivines primitives." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2009. http://tel.archives-ouvertes.fr/tel-00453889.
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Les éléments volatils, principalement l'eau, sont enrichis dans les magmas d'arcs. Ils jouent un rôle prépondérant dans le magmatisme de zone de subduction, que ce soit en permettant la fusion du manteau ou en influençant l'explosivité des éruptions en surface. L'objectif de cette étude est la caractérisation (en éléments majeurs, traces, volatils et isotopes du bore) des liquides primaires des magmas d'arcs et de leurs sources, afin de discuter de l'influence des phases mobiles issues du slab dans leur genèse. L'approche adoptée est l'analyse des inclusions magmatiques piégées dans les olivines magnésiennes de quatre volcans répartis dans trois zones de subduction : Vulcano, dans l'arc Eolien (Italie), le Mont Shasta, dans l'arc des Cascades (Californie, Etats-Unis), le Pichincha et le Pan de Azucar, dans l'arc Equatorien. Les inclusions primaires étudiées contiennent des liquides basaltiques sous-saturés en silice, plus ou moins riches en CaO, dérivant d'une source mantellique veinée de zones riches en amphiboles (±clinopyroxène, ±phlogopite) et ayant subi un degré variable de métasomatisme. Leurs compositions en éléments traces illustrent l'enrichissement de leurs sources mantelliques par des composés mobiles issus du slab et de compositions contrastées. Il existe d'importantes variations des compositions en éléments volatils entre les inclusions provenant de plusieurs échantillons d'un même volcan (le Mont Shasta), celles provenant de plusieurs volcans d'une même zone de subduction (le Pichincha et le Pan de Azucar) ainsi qu'entre les inclusions des trois zones de subduction étudiées (arc Eolien, arc Equatorien et arc des Cascades). L'étude de l'évolution des teneurs en éléments volatils en fonction des pressions de saturation indique que seules les teneurs en Cl et F des inclusions magmatiques sont représentatives des teneurs du magma primitif. Le dégazage précoce et la formation de globules de sulfure affectent les teneurs en H2O, CO2 et S, qui peuvent être utilisées en tant qu'estimations minimales des teneurs des magmas primitifs. Les compositions en Cl des sources mantelliques des inclusions étudiées varient de 3±1 ppm à 450±125 ppm et celles en F varient de 16±6 ppm à 147±32 ppm (Cl/F de 0,2±0,1 à 3,6±1,2). L'association des rapports Cl/F des sources avec l'enrichissement en Nb (par rapport aux MORB) des inclusions et leurs valeurs isotopiques en bore suggère la participation de deux principaux composés mobiles dans la source de ces inclusions : (1) un liquide silicaté issu de la fusion des sédiments déshydratés (principal agent métasomatique de la source des inclusions du Pan de Azucar, qui possèdent des faibles δ11B ainsi qu'un fort enrichissement en Nb par rapport aux MORB) ; (2) un fluide aqueux formé lors de la déshydratation de la croûte océanique (principal agent métasomatique de la source des inclusions du Pichincha). Selon les propriétés physico-chimiques des différentes zones de subduction, ce fluide peut avoir les caractéristiques d'un fluide supercritique et être plus ou moins riche en éléments traces. Les compositions des inclusions de la Sommata (Italie) et de l'échantillon 95-15 du Mont Shasta montrent des enrichissements intermédiaires de leurs sources comparé à celles des inclusions du Pichincha et du Pan de Azucar. Leurs sources semblent avoir été métasomatisées par un mélange entre les deux composés métasomatiques décrits ci-dessus.
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Paczkowski, Mieczysław Celestyn. "Esegesi, teologia e mistica : il prologo di Giovanni nelle opere di S. Basilio Magno /." Jerusalem : Franciscan printing press, 1995. http://catalogue.bnf.fr/ark:/12148/cb39226294j.
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Racine, Jean-François. "The text of Matthew in the writings of Basil of Caesarea /." Leiden : Brill, 2004. http://catalogue.bnf.fr/ark:/12148/cb41147912s.
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Bulourde, Marc. "Processus d'altération des basaltes du Mont Cameroun : approche géochimique /." Rennes : Université de Rennes I, Géosciences, 2001. http://catalogue.bnf.fr/ark:/12148/cb389404259.
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Cornet, Sylvie. "Evolution de la lame basale glomérulaire au cours de la néphrogenèse et du vieillissement chez le rat." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37613007q.
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Palacios, Muñoz Ivette Aida. "Análisis sobre la viabilidad para implementar el método de costeo basado en actividades (ABC), en una mediana empresa del sector textil en Puebla." Thesis, Universidad de las Américas Puebla, 2013. http://catarina.udlap.mx/u_dl_a/tales/documentos/load/palacios_m_ia/.
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Debido a la apertura de los mercados en la actualidad, la alta competencia global y los avances tanto tecnológicos como científicos han obligado a las empresas a perfeccionar sus herramientas de gestión. Sin duda, el utilizar un método de costeo adecuado se ha convertido en una necesidad prioritaria para las empresas. El sistema de costeo basado en actividades (ABC), es considerado más que un método de costeo, es un proceso gerencial para administrar las actividades y procesos del negocio con la finalidad de facilitar la toma de decisiones de operación y estratégicas.
Abstract.
Due to the opening of markets today, the high levels of competition at a global extent, and the technological and scientific advances have forced companies to improve their management tools. The use of a suitable cost method has become, without a doubt, a priority need for all businesses. The system of Activity-Based Costing (ABC) is considered not just a cost method, but a complete management process that allows companies their business processes and activities that benefits results in when choosing strategic and operational decisions.
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Gautier, Isabelle. "Les Basaltes des îles Kerguelen, terres australes et antarctiques françaises." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37605343p.
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Guerra, Robalino Axel. "Análisis del crédito de consumo basado en el costeo ABC para optimizar la toma de decisiones en los canales comercializadores de una entidad financiera." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2019. https://hdl.handle.net/20.500.12672/11450.
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Analiza el costo del crédito de consumo PLD basado en el costeo ABC para optimizar la toma de decisiones en los canales comercializadores de una entidad financiera. El sistema de costeo ABC no es una técnica totalmente original y novedosa ya que se fundamenta en los principios de la Teoría General de Costo en la cual su objetivo principal es el costo indirecto para minimizar los costos de producción y sin dejar de responder pertinentemente a las necesidades específicas del cliente. De esta manera, su foco en las actividades permite la mejora de los procesos y obtener los resultados esperados. En tal sentido, el objetivo de la investigación fue analizar el costo del crédito de consumo basado en el sistema de costeo ABC para determinar la eficiencia de los canales comercializadores en una entidad financiera. Posterior a la implementación de dicho sistema, se determinaron los costos en la red de agencias por puestos para los créditos de consumo PLD en la entidad financiera a través del costo directo por medio de los gastos operativos (gastos del personal y gastos administrativos) y el costo indirecto mediante las comisiones totales asignadas. Asimismo, se determinaron los costos de la banca telefónica estableciendo como costo directo el gasto del personal (remuneración variable) y el costo indirecto, las comisiones. Por último, se determinaron los costos de la fuerza de venta externa, considerando el gasto del personal (remuneraciones variables) como costo directo y las comisiones como el costo indirecto. En síntesis, la implementación del sistema de costeo ABC en la institución financiera permitió establecer los costos (directos e indirectos) a través de la representación gráfica de las actividades y evaluar los recursos para direccionarlos de forma efectiva para las mismas. Paralelamente, analizar el flujo de ingresos de acuerdo a cada colocación de un producto.Tesis
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Taj-Eddine, Kamal. "Le Jurassique terminal et le Crétacé basal dans l'Atlas atlantique, Maroc : biostratigraphie, sédimentologie, stratigraphie séquentielle et géodynamique /." Toulouse : Laboratoire de géologie sédimentaire et paléontologie, 1992. http://catalogue.bnf.fr/ark:/12148/cb366597084.
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Cataldo, Gómez Pedro Hugo. "Modelamiento de un Sistema de Costeo Basado en Actividades para el Proceso de Flotación de la Compañía Minera Doña Inés de Collahuasi." Tesis, Universidad de Chile, 2008. http://www.repositorio.uchile.cl/handle/2250/101969.
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Hamelin, Bruno. "Les Echelles d'hétérogénéité du manteau étude isotopique... de basaltes et de péridotites." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb375982205.
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Mendoza, Soto Nikitza Brigyth, and Chacón Lucy Arcira Sánchez. "Sistema de Costeo ABC y su influencia en la gestión empresarial de las medianas y pequeñas empresas textiles comercializadoras de productos de merchandising, Lima 2017." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2018. http://hdl.handle.net/10757/625773.
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El presente Trabajo de Suficiencia Profesional es una investigación basada en fuentes primarias y secundarias, cuya finalidad es evaluar la influencia del Sistema de Costeo ABC en la Gestión Empresarial de las Mypes textiles comercializadoras de merchandising de Lima 2017. En el primer capítulo, está compuesto por el Marco Teórico, el cual es necesario para analizar las diversas interpretaciones y puntos de vista de los expertos en el tema, que permitirá validar el análisis y diagnóstico relacionados con el sistema de Coste ABC y su influencia en la Gestión empresarial.
El segundo capítulo, se relaciona con el planteamiento del problema, en el cual se desarrolla la justificación del tema en investigación bajo la coyuntura actual. Asimismo, se trabajarán los objetivos para dar solución a los problemas propuestos y validar la hipótesis del presente trabajo. El tercer capítulo, se presenta la metodología escogida para sustentar la postura respecto a la presenta investigación. El cuarto capítulo, consiste en el desarrollo del caso aplicativo de la empresa L&N S.R.L, asimismo, se desarrolla la aplicación de los instrumentos y resultados obtenidos según la metodología escogida para la investigación, el cual respaldara la hipótesis a sustentar.
Finalmente, el quinto capítulo desarrollará el análisis de los resultados cualitativo y cuantitativo, a fin de emitir las conclusiones y recomendaciones finales respecto al presente trabajo de investigación.The present Work of Professional Sufficiency is a research based on primary and secondary sources, whose purpose is to evaluate the influence of the Activity-Based Costing (ABC) system in the Business Management in the textile Micro and Small Enterprises (MSE and MYPE for its spanish acronyms) dedicated to the merchandising business in the year 2017 in Lima. The first chapter is composed of the theoretical framework, which is necessary to analyze the diverse interpretations and points of view of the experts in the subject; this will allow validated the analysis and the diagnoses related to the Activity-Based Costing (ABC) system and its influence in the business management. The second chapter is about the approach of the problem where the justification of the present research under the current conjuncture is developed. Likewise, the definition of the objectives for solve the proposed problems and the validation the hypotheses of the present work are considered as part of this section. The third chapter, the methodology to support the position regarding the present investigation is presented. The fourth chapter consists of the development of the applicative case of the company L & N S.R.L, as well as the application of the instruments and the results obtained according to the methodology chosen for the investigation, which will support the hypothesis of the present work. Finally, the fifth chapter will develop the qualitative and quantitative analysis of the results in order to issue the final conclusions and recommendations in this research work.
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Ildefonse, Philippe. "Analyse pétrologique des altérations prémétéoriques et météoriques de deux roches basaltiques basalte alcalin de Belbex, Cantal, et Hawaiite de M'Bouda, Cameroun /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37606095b.
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Weber, Barbara. "Interactions basalte-lithosphère mantellique en contexte intraplaque océanique : exemples de Tahiti et de Tahaa, plaque rapide et de la Réunion, plaque lente /." [Fontainebleau] : Centre de géologie générale et minière, 1992. http://catalogue.bnf.fr/ark:/12148/cb35551681p.
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Metzner, Christian. "Petrographie, Geochemie und Differentiation der Alkalibasalte bei Shaba im Zentrum des Südsyrischen Flutbasaltkomplexes, Hawran-Jabal Ad-Drouze : Modellierung der Primärmagmen und der chemischen Zusammensetzung ihrer Wurzelregion im Oberen Erdmantel /." Bonn : Holos, 1992. http://catalogue.bnf.fr/ark:/12148/cb374299034.
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Stalla, Bernhard Josef. "Aloys Fischer (1880-1937) : Biographie und Bildungstheorie : eine Analyse zu einem anthropologisch-interdisziplinären Bildungsdenken im Sinne eines geisteswissenschaftlichen Kontinuitätskonzeptes für basale Bildungsprozesse /." Frankfurt a. Main : Lang, 1999. http://catalogue.bnf.fr/ark:/12148/cb37222004z.
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Mendoza, Talavera Oscar. "Les formations orogéniques mésozoiques du Guerrero (Mexique méridional) : contribution à la connaissance de l'évolution géodynamique des cordillères mexicaines." Grenoble 1, 1993. http://www.theses.fr/1993GRE10037.
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Dans le secteur de taxco-zihuatanejo (Mexique méridional) affleurent six séquences volcano-sédimentaires et/ou volcano-plutoniques d'arc datées du jurassique supérieur au crétacé inferieur qui se sont accrétées au craton nord-américain à la fin du crétacé inférieur. La séquence de taxco-taxco viejo comprend des andésites, des dacites et des rhyolites calco-alcalines inter stratifiées dans une sédimentation exclusivement détritique. Elle est affectée par un métamorphisme syncinématique de basse température (221-276c). Cette formation représente vraisemblablement le témoin d'un arc insulaire édifié sur un substratum continental. La séquence de teloloapan comprend des pillow lavas basiques surmontes en concordance par des dépôts volanoclastiques à lentilles de calcaires récifaux de l'aptien et des calcaires récifaux de aptien-albien. Elle est affectée par deux métamorphismes de bas degré: (i) hydrothermal océanique et (ii) syn-cinématique. Le volcanisme comprend surtout des basaltes et des andésites calco-alcalins avec de rares roches acides (andésites et rhyolites tholeiitiques). Comparées aux séries calco-alcalines d'arc intra-océanique les basaltes et andésites sont enrichis en hfse et lree. Les basaltes et andésites présentent des différences géochimiques et un nd compris entre 4,6-1,6. Cette séquence s'est développée dans un environnement d'arc insulaire intra-océanique. La séquence plutono-volcanique d'arcelia comprend un ensemble plutonique qui repose en klippe sur des basaltes en coussins recoupes par des filons basiques. La sédimentation est soit micritique au sein de la pile volcanique soit pelitique à radiolaires au sommet et datée de l'albien-cénomanien. Laves et filons sont affectés par un métamorphisme statique et hydrothermal prehnite-pumpellyite. Les roches basiques d'arcelia y compris les rhyolites montrent des affinités de tholeiite typique d'arc insulaire intra-océanique (nd compris entre +8 et +6). La séquence de huetamo représente le comblement d'un bassin fortement subsident qui se développe entre des îles volcaniques appartenant à un environnement d'arc insulaire. La séquence volcano-sédimentaire de zihuatanejo alocenomanienne est composée de pyroclastites et de laves calco-alcalines déjà différenciées, associées à des calcaires récifaux et/ou des couches rouges continentales. Le complexe de subduction de las ollas comprend des blocs de roches basiques et ultrabasiques enchâssés dans une matrice de serpentine ou de flysch. Ces blocs sont affectés par un métamorphisme hp-bt. Les roches basiques montrent des affinités de tholeiites d'arc, appauvries en terres rares légères. Leurs caractères géochimiques communs suggèrent qu'elles représentent des fragments dissociés d'une croûte supérieure d'un arc insulaire intra-océanique, formée aux tous premiers stades de l'activité de l'arc. Les affinites magmatiques des séries d'arc mésozoïques du Guerrero terrane sont très diversifiées à la fois d'une séquence à l'autre et à l'intérieur d'une même séquence. Cependant, deux ensembles peuvent être reconnus: (i) des tholeiites d'arc appauvries à légèrement enrichies en lree, composées exclusivement de basaltes et de leurs filons nourriciers et présentés a arcelia et las ollas. Quelle que soit la séquence, des cumulats ultrabasiques et basiques sont tectoniquement associés aux laves. Leur source mantellique appauvrie (nd compris entre +8 et +5. 5) est du type lherzolite a spinelles ; (ii) des séries calco-alcalines enrichies ou appauvries en hfs. Les roches basiques prédominent dans la série calco-alcaline enrichie en hfs (famille i), représentée par les basaltes et les andésites de l'aptien-albien de teloloapan et qui dérivent d'une source enrichie de type lherzolite à grenat. La série appauvrie en hfs (nd compris entre +9 et +7,5) est représentée par les andésites de zihuatanejo et les galets de l'aptien-albien de huetamo (famille ii) et qui dérive d'une source mantellique appauvrie, identique à celle des tholeiites mais avec des taux de fusion partielle moins élevés. Enfin la famille iii regroupe les laves de taxco et présente des caractères intermédiaires entre les familles i et ii. Ainsi, les séquences magmatiques orogéniques du Guerrero terrane reflètent la complexité de cet arc ou de ces arcs qui, néanmoins, ont fonctionné pratiquement en même temps
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Boumehdi, Ahmed. "Les Clinopyroxènes dans les basaltes alcalins continentaux, Massif Central, France implications pétrogénétiques et barométriques /." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37612072x.
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Schüpbach-Guggenbühl, Samuel. "Schlüssel zur Macht : Verflechtungen und informelles Verhalten im Kleinen Rat zu Basel, 1570-1600 /." Basel : Schwabe, 2002. http://catalogue.bnf.fr/ark:/12148/cb41324100s.
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Suter, Stefan. "Die Gutachten der Basler Juristenfakultät in Straffällen : vom ausgehenden 16. bis zum Beginn des 19. Jahrhunderts /." Basel : Helbing & Lichtenhahn, 1990. http://catalogue.bnf.fr/ark:/12148/cb36679026j.
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Irvin, Barbara Bando. "A Content Analysis of the Writing Assignments Contained in the Four Basal Mathematics Textbook Series Adopted by the State of Texas." Thesis, University of North Texas, 1993. https://digital.library.unt.edu/ark:/67531/metadc278719/.
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The purpose of this study was to identify and compare specific writing assignments provided in the four basal mathematics textbook series, grades six through eight, accepted by the state of Texas in 1990. The student and teachers' editions by each publisher were analyzed (1) for the total number and types of writing assignments provided, (2) to compare how the writing assignments compared with the four purposes of writing mandated in the English Language Arts Framework, Kindergarten through Grade 12 for the state of Texas, (3) to compare how the writing assignments compared with the recommendations for communication opportunities stated in the National Council of Teachers of Mathematics' Curriculum and Evaluation Standards for School Mathematics for grades five through eight, and (4) to compare the number and types of writing assignments among the four publishers. The total number of writing assignments varied among publishers ranging from 151 to 316 in the student editions and from 147 to 523 in the teacher's editions. The findings of this study indicate that from 80 to 98 percent of the writing assignments in the student editions and from 72 to 96 percent of the writing assignments in the teacher's editions corresponded to the Informative purpose of writing. Very few writing assignments were provided corresponding to the Literary, Expressive, and Persuasive purposes of writing. The writing assignments corresponding to the NCTM recommendations varied among publishers. Writing assignments dealing with modeling mathematical situations ranged from 14 to 66 percent in the student editions and from 24 to 39 percent in the teacher's editions. Writing assignments focusing on understanding and definitions ranged 15 to 61 percent in the student editions and from 31 to 53 percent in the teacher's editions. Writing assignments focusing on interpretation and application ranged from 5 to 29 percent in the student editions and from 10 to 15 percent in the teacher's editions.
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Moscaiza, Moncada Omar Israel. "Diseño de un sistema de gestión de la seguridad de la información (SGSI) para la Cooperativa de Ahorro y Crédito ABC, basado en la norma ISO 27001:2013." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2018. http://hdl.handle.net/10757/623063.
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Diseño de un modelo que permite gestionar la seguridad de la Información para la Cooperativa de Ahorro y Crédito ABC, en base a la norma ISO 27001:2013, teniendo en consideración la evolución, normativas y problemática interna de este tipo de instituciones financieras, las cuales poseen aspectos que evidencian la necesidad de direccionar sus procesos hacia una efectiva gestión de riesgos,así como, la adecuación a los requerimientos regulatorios vigentes, permitiendo que se preserve la disponibilidad, confidencialidad e integridad de la información.Work a model has been designed which allows to manage the security of the Information for the ABC Savings and Credit Cooperative, based on the ISO 27001:2013 standard, taking into consideration the evolution, regulations and internal problems of this type of financial institutions, which have aspects that demonstrate the need to address their processes towards an effective risk management, as well as, the conformity to the current regulatory requirements allowing it to be preserved the availability, confidentiality and integraty of the information.
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Van, Noord Kenrick A. A. "Deep-marine sedimentation and volcanism in the Silverwood Group, New England Fold Belt, Australia." Thesis, Queensland University of Technology, 1999.
Find full textAbstract:
In eastern Australia, the New England Fold Belt (NEFB) comprises an ancient convergent margin that was active from the Paleozoic until the late Mesozoic. Considerable effort has been expended in understanding the development of this margin over the past twenty years. However, proposed tectonic models for the orogen have either been too broad, ignoring contradictory local evidence, or too locally specific without paying attention to the 'big picture'. The research presented in this work addresses the issue of appropriate scale and depth of geological detail by studying the NEFB at the terrane-scale. Using one succession, the Silverwood Group of southeast Queensland, this work demonstrates that detailed sedimentological studies and basin analysis at the terrane-scale can help to refine hypotheses regarding the tectonic evolution of the NEFB.
The Silverwood Group (Keinjan terrane), located approximately 140 km southwest of Brisbane, Australia, is a succession of arc-related basins that developed within an ancient intraoceanic island-arc during the mid-Cambrian to Late Devonian. From the base of the succession, the group consists of five formations totalling -9700 m. These include the Risdon Stud Formation (2500 m), Connolly Volcanics (2400 m), Bald Hill Formation (2450 m), Ormoral Volcanics (600 m) and the Bromley Hills Formation (1700 m). The Long Mountain Breccia Member (300m) is a separate unit which forms the lower part of the Bromley Hills Formation. The entire succession has been thrust west over the Late Devonian to Early Carboniferous Texas beds. Elsewhere, the Silverwood Group is unconformably overlain by and faulted against Early to Late Permian units including the Rokeby beds, Wallaby beds, Tunnel beds, Fitz Creek beds, Eight Mile Creek beds, Rhyolite Range beds and Condamine beds. Of these Permian units, all but the Condamine beds form part of the Wildash Succession. To the west, southwest and south, the Silverwood Group is intruded by the Late Triassic Herries and Stanthorpe Adamellites. All of these sequences and the two plutonic intrusives are unconformably overlain by the Jurassic sediments of the Marburg Sandstone.
The Silverwood Group and Texas beds consist of various lithologies including grey, purple- grey, green and green-grey volcaniclastic conglomerates, sandstones, siltstones or mudstones, massive and laminated chert, polymict or monomict breccias, muddy breccias, muddy sandstones, and volcanic rocks. Volcanic rocks include various tholeiitic metabasites, dolerite, meta-andesites and infrequent metadacite. In the Silverwood Group, these volcanic rocks are often accompanied by mafic pyroclastic rocks (e.g. peperite and hyaloclastite). Facies analyses of these lithologies has led to the recognition of 19 deep-marine turbiditic and volcanic/volcaniclastic facies that were deposited by three main processes: i) gravity-flow processes (e.g. low- and high-density volcaniclastic turbidites and mass-flows), ii) chemical/biological processes (siliceous oozes- chert) and iii) direct initiation by volcanic processes (e.g. flows, hypabyssal intrusions and associated pyroclastic facies).
For the Silverwood Group, the defined facies occur in distinct vertical associations that form recognisable 3rd and 4th-order architectural elements such as channel, levee, suprafan lobe, outer-fan, basin plain, mass transport complex, volcanic flows, syn-sedimentary sills and syn-sedimentary emergent cryptodomes. These architectural elements are represented in a series of deep-marine depositional environments including slope, shelf-edge failure, submarine-fan and subaqueous basaltic volcanoes. The Risdon Stud Formation and parts of the Connolly Volcanics were deposited along a 'normal' clastic or mud, mud/sand-rich and/or sand/mud-rich slope. Both upper and lower slope environments are represented and in both formations, the slope is speculated to have faced eastwards and prograded away from an active arc located west. Sediments from both successions accumulated at palaeodepths of 1200 to 2000 m.
Although sediments from the upper part of the Bald Hill Formation were also deposited on a slope, these sequences have subsequently collapsed into the depocentre to form extensive slump deposits accompanied by olistoliths of older arc crust. The lower part of the Bald Hill Formation formed by similar processes, although the failure was far more extensive (>20 km along strike). This latter part of the formation is interpreted to be a major shelf-edge failure succession. Upper parts of the Bald Hill Formation also accumulated at palaeodepths of 1200 to 2000 m, but the deposition of these sediments occurred farthest from the shelf and at the greatest depth compared to the Risdon Stud Formation and Connolly Volcanics. Lower parts of the Bald Hill Formation were deposited at palaeodepths of approximately 1700 m.
Subaqueous basaltic volcanoes are prominent in the Connolly Volcanics, Bald Hill Formation and Ormoral Volcanics. In the Bald Hill Formation, igneous rocks were emplaced into the shelf-edge failure succession as a series of syn-sedimentary sills and cryptodomes. These high-level hypabyssal rocks occasionally became emergent above the sediment-water interface, whereupon they were partially resedimented. In some parts of the Bald Hill Formation, the hypabyssal intrusions were blanketed by basin plain deposits that are contemporaneous with the slumps and olistoliths in the upper part of the formation. The intrusive rocks were emplaced at 1700 m palaeodepth.
Unlike the Bald Hill Formation, the Ormoral Volcanics and lower parts of the Connolly Volcanics form thick accumulations of extrusive volcanic and pyroclastic rocks that built a significant volcanic pile. Volcanic and pyroclastic facies within these successions were deposited proximal to their source (0-10 km of vent). Extrusive rocks within the Ormoral Volcanics are thought to be derived from intrabasinal fissure-vents located at palaeodepths of 1700 to 3100 m. Igneous rocks from the Connolly Volcanics, Bald Hill Formation and Ormoral Volcanics have the petrological and geochemical characteristics of back-arc basin basalts (BAB) that were sourced from undepleted to slightly enriched Fertile MORB Mantle-wedge (FMM). The FMM material was variably enriched in trace elements by fluids derived from the subducting slab prior to emplacement of the igneous rocks. Immediately following emplacement, these rocks were hydrothermally metamorphosed under conditions of low-pressure and transitional low to high-temperature (200-300 °C). By contrast, igneous rocks within the Texas beds lack enrichment in subduction components and are characteristic of N-MORB.
The Bromley Hills Formation is a sand-rich point-source submarine fan deposited at palaeodepths of 500 to 2000 m. The fan was initiated by a mass transport complex resulting from subaerial collapse of a basaltic-andesitic stratovolcano. The submarine fan is characterised by two repetitive stages of retrogressive sedimentation during which channel-levee elements (inner-fan channels) are overlain by suprafan lobe elements (mid-fan) and then by outer-fan deposits as sea-level rises within the depocentre. Both inner-fan channels and suprafan lobes show centralised stacking patterns with limited lateral migration that indicate the depocentre was laterally restricted during sedimentation (e.g. submarine ridges). The Bromley Hills Formation exhibits all the characteristics typical of an active margin fan that formed by a combination of tectonic stage initiation followed by eustatically controlled regressive deposition.
Volcaniclastic sediments of the Silverwood Group range in composition from lithic to lithic- feldspathic wackes and arenites, although they are mainly lithic or feldspathic-lithic wackes and arenites. Many samples are tuffaceous (25-75% pyroclasts), particularly those from the Connolly Volcanics, Ormoral Volcanics and Bromley Hills Formation. Samples in the Bald Hills Formation and Texas beds can be classified as quartz-rich. The majority of the Silverwood Group was sourced from an undissected intraoceanic island-arc, although sediments within the Bald Hill Formation exhibit a provenance that is characteristic of uplift within the arc (recorded as a 'strike-slip continental arc' model). Epiclastic sediments from the Texas beds were sourced from a transitional to dissected continental arc.
Formations of the Silverwood Group were mostly deposited in a series of intra-arc basins within an ancient intra-oceanic island arc, although the lowermost formation developed in a marginal basin (Risdon Stud Formation). All of the basins were located east of the active arc (behind the arc), keeping in mind the present location of the Group relative to the Texas-Coffs Harbour megafold. The entire succession formed during four-phases of arc-related basin development that coincide with major changes in the strain regime of the arc. From the base of the succession, these changes are: I) mid Cambrian to late Silurian marginal basin sedimentation- relative compression within the arc (Risdon Stud Formation), II) late Silurian to Early Devonian intra-arc rifting- relative extension within the arc (Connolly Volcanics), Ill) Early to early Middle Devonian basin collapse followed by intra-arc rifting- relative extension to compression (Bald Hill Formation and Ormoral Volcanics) and IV) early Middle to Late Devonian intra-arc submarine fan sedimentation- relative compression (Bromley Hills Formation).
Comparing the Silverwood Group against equivalent terranes of Cambrian to Devonian age within the New England Fold Belt (NEFB) suggests that the Gamilaroi terrane, Calliope Volcanic Assemblage, Willowie Creek beds and Silverwood Group all formed as one intraoceanic island-arc during the Early to Late Devonian. Prior to this, significant differences in the sedimentological evolution of these terranes suggests that they occupied different positions relative to each other within the one arc. It is proposed that the NEFB formed as a result of dual west-directed subduction zones during the Cambrian to Middle Devonian period. During this time, a single intraoceanic island-arc located seaward of the Australian craton developed above a west-directed subduction zone. This arc was separated from the craton by a marginal sea. A second west-directed subduction zone was located beneath a continental arc developed on the Australian craton. Cambrian to Early Devonian terranes within and along the Peel Fault are proposed to form a part of the ancient subduction zone present beneath the intraoceanic island-arc (Weraerai and Djungati terranes). Collision of the intraoceanic island-arc occurred during the Late Devonian, at which point west-directed subduction occurred beneath the Australian craton and the accreted intraoceanic island-arc. Following collision, a new continental volcanic arc was established that was active during the Late Devonian to Early Carboniferous.
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Grolimund, Christoph. "Die Briefe der Stadt Basel im 15. Jahrhundert : ein textlinguistischer Beitrag zur historischen Stadtsprache Basels /." Basel : Francke, 1995. http://catalogue.bnf.fr/ark:/12148/cb35761402j.
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