Thesis (M.S.) -- University of Montana, 2008. / Title from author supplied metadata. Description based on contents viewed on June 26, 2009. Includes bibliographical references.

Thesis (MScEng)--Stellenbosch University, 2013. / ENGLISH ABSTRACT: Computational Aeroelasticity is a complex research field which combines structural and aerodynamic analyses to describe a vehicle in flight. This thesis investigates the feasibility of including such an analysis in the development of control systems for unmanned aerial vehicles within the Electronic Systems Laboratory at the Department of Electrical and Electronic Engineering at Stellenbosch University. This is done through the development of a structural analysis algorithm using the Finite Element Method, an aerodynamic algorithm for Prandtl’s Lifting Line Theory and experimental work. The experimental work was conducted at the Low-Speed Wind Tunnel at the Department of Mechanical and Mechatronic Engineering. The structural algorithm was applied to 20-noded hexahedral elements in a winglike structure. The wing was modelled as a cantilever beam, with a fixed and a free end. Natural frequencies and deflections were verified with the experimental model and commercial software. The aerodynamic algorithm was applied to a Clark-Y airfoil with a chord of 0:1m and a half-span of 0:5m. This profile was also used on the experimental model. Experimental data was captured using single axis accelerometers. All postprocessing of data is also discussed in this thesis. Results show good correlation between the structural algorithm and experimental data. / AFRIKAANSE OPSOMMING: Numeriese Aeroelastisiteit is ’n komplekse navorsingsveld waar ’n vlieënde voertuig deur ’n strukturele en ’n aerodinamiese analise beskryf word. Hierdie tesis ondersoek die toepaslikheid van hierdie tipe analise in die ontwerp van beheerstelsels vir onbemande voertuie binne die ESL groep van die Departement Elektriese en Elektroniese Ingenieurswese by Stellenbosch Universiteit. Die ondersoek bevat die ontwikkeling van ’n strukturele algoritme met die gebruik van die Eindige Element Methode, ’n aerodinamiese algoritme vir Prandtl se Heflynteorie en eksperimentele werk. Die eksperimentele werk is by die Department Meganiese en Megatroniese Ingensierswese toegepas in die Lae-Spoed Windtonnel. Die strukturele algoritme maak gebruik van ’n 20-nodus heksahedrale element om ’n vlerk-tipe struktuur op te bou. Die vlerk is vereenvouding na ’n kantelbalk met ’n vasgeklemde en ’n vrye ent. Natuurlike frekwensies en defleksies is met die eksperimentele werk en kommersiële sagteware geverifieer. Die aerodinamiese algoritme is op ’n Clark-Y profiel met 0:1m koord lengte en ’n halwe vlerk length van 0:5m geïmplementeer. Die profiel is ook in die eksperimentele model gebruik. Die eksperimentele data is met eendimensionele versnellingsmeters opgeneem. Al die verdere berekeninge wat op ekperimentele data gedoen is, word in die tesis beskryf. Resultate toon goeie korrelasie tussen die strukturele algoritme en die eksperimentele data.

Made available in DSpace on 2016-12-08T16:51:56Z (GMT). No. of bitstreams: 1 Giselly.pdf: 1070486 bytes, checksum: 8e9338a68195c98cb79d2f08c19a9f7e (MD5) Previous issue date: 2012-03-26 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This dissertation aims to investigate processes of production of contemporary art that are based on principles of interaction and aesthetic experience. To this end, we will analyze the procedures suggested by the artists Lygia Clark and Pina Bausch. The artwork as a device that causes the spectator's perception and action is the core of this research. The phenomenon of art in this context occurs in the relationship between subject, object and space. All of them happening at the same time. Public and artwork as an unique landscape. They are not separated, but constitute each other. The place of the spectator also becomes the place of the artwork. This work is built on references that addresses the experience as an event that encourages participation from the spectator trough approaches, questions and revelations. These movements coincide with the displacement of the gaze and the transformation of meanings imposed. The proposals and reflections suggested by the artists provide material for speculation of art and contemporary theatrical environment as a growing field - a place that pushes the boundaries of languages and is legitimated as a field of experience seeking a cannibalistic look, look which observes and absorbs the world as the first time / Esta dissertação tem como objetivo investigar processos de produção da arte contemporânea que se fundamentam em princípios de interação e experiência estética. Para tanto, serão analisados os procedimentos sugeridos pelas artistas Lygia Clark e Pina Bausch. A obra como dispositivo que provoca a ação e a percepção do espectador é o eixo central desta pesquisa. O fenômeno da arte, neste contexto, se dá na articulação entre sujeito, objeto e espaço. Todos acontecendo ao mesmo tempo. Público e obra pretendem formar uma única paisagem. Eles não estão separados, mas se constituem reciprocamente. O lugar do espectador torna-se também o lugar da obra. Este trabalho se constrói sobre referências bibliográficas que abordam a experiência como evento que incentiva a participação do espectador a partir de aproximações, questionamentos e revelações. Movimentos estes que coincidem com o deslocamento do olhar e com a transformação de sentidos instituídos. As propostas e reflexões sugeridas pelas artistas fornecem material para a especulação da arte e do ambiente teatral contemporâneo como campo em expansão lugar que ultrapassa os limites das linguagens e se legitima como campo de experiência que solicita um olhar antropofágico, olhar que observa e absorve o mundo como pela primeira vez

This dissertation primarily concerns performance aspects in compositions for piano and tape, using three specific works as the basis for discussion: Larry Austin's Sonata Concertante, Thomas Clark's Peninsula, and Phil Winsor's Passages. These compositions are representative of the medium as a whole, yet each offers its own unique set of performance problems.

Multiple high-fidelity, time-accurate computational fluid dynamics simulations were performed to investigate the effects of upstream stator loading and rotor shock strength on vortex shedding characteristics in a single stage transonic compressor. Various configurations of a transonic axial compressor stage, including three stator/rotor axial spacings of close, mid, and far in conjunction with three stator loadings of decreased, nominal, and increased were simulated in order to understand the flow physics of transonic blade-row interactions. Low-speed compressors typically have reduced stator/rotor axial spacing in order to decrease engine weight, and also because there is an increase in efficiency with reduced axial spacing. The presence of a rotor bow shock in high-speed compressors causes additional losses as the shock interacts with the upstream stator trailing edge. This research analyzes the strength of shock-induced vortices due to these unsteady blade-row interactions. The time-accurate URANS code, TURBO, was used to generate periodic, quarter annulus simulations of the Blade Row Interaction compressor rig. Both time-averaged and time-accurate results compare well with experimentally-observed trends. It was observed that vortex shedding was synchronized to the passing of a rotor bow shock. Normal and large shock-induced vortices formed on the stator trailing edge immediately after the shock passing, but the large vortices were strengthened at the trailing edge due to a low-velocity region on the suction surface. This low velocity region was generated upstream of mid-chord on the suction surface from a shock-induced thickening of the boundary layer or separation bubble, due to the rotor bow shock reflecting off the stator trailing edge and propagating upstream. The circulation of the shock-induced vortices increased with shock strength (decreased axial spacing) and stator loading. Most design tools do not directly account for unsteady effects such as blade-row interactions, so a model is developed to help designers account for shock-induced vortex strength with varying shock strength and stator loading. An understanding of the unsteady interactions associated with blade loading and rotor shock strength in transonic stages will help compressor designers account for unsteady flow physics early in the design process.

[ES] La presente investigación de doctorado tiene como objetivo reivindicar una mayor importancia para la actividad del conservador de las instituciones museológicas, partiendo de un cambio de paradigma que coloque al conservador en el centro de las discusiones referentes a la toma de decisiones relacionadas con las obras de arte pertenecientes a colecciones de estas instituciones. Partiendo del presupuesto de que es posible, por analogía, comparar a la institución museo con un ecosistema, es decir como un sistema mayor formado por varios sistemas menores, se pretende examinar como tienen lugar las relaciones entre los conservadores, que actúan en un subsistema específico, y los diversos agentes que actúan en otros subsistemas. Los museos, como otros campos sociales, son espacios de relación en los cuales estructuras jerárquicas de poder pueden generar conflictos entre los agentes que allí actúan. Esta constatación expone problemas variados que pueden afectar a las obras de arte, desde la adquisición, pasando por la conservación y guarda y por la restauración propiamente dicha, hasta llegar a la exhibición entre otros. El entendimiento del conservador como gestor se propone como una alternativa, que busca dar respuesta a los diversos problemas relacionados al proceso de toma de decisiones en beneficio de las obras de arte. La hipótesis defendida es la de que el conservador, como agente poseedor de las prerrogativas para operar como interlocutor político en la interfaz entre los diversos subsistemas del sistema museo, es el agente que puede conducir las discusiones y opinar sobre los diversos aspectos relacionados a los objetos que confieren identidad a la institución museo. De esta manera, el cambio de paradigma propuesto puede contribuir para el equilibrio del ecosistema museo, en favor de todos los que allí comparten relaciones de trabajo buscando el bien común. / [CA] La present investigación de doctorat té com a objectiu reivindicar una major importància per a l'activitat del conservador de les institucions museològiques, partint d'un canvi de paradigma que col.loque al conservador en el centre de les discussions referents a la pressa de decisions relacionades amb les obres d'art pertanyents a col.leccions d'aquestes institucions. Partint del pressupost que és possible, per analogía, comparar a la institució museu amb un ecosistema, és a dir com un sistema major format per diversos sistemes menors, es pretén examinar com tenen lloc les relacions entre els conservadors, que actuen en un subsitema específic, i els diversos agents que actuen en altres subsistemes. Els museus, com altres camps socials, són espais de relació en els quals estructures jeràrquiques de poder poden generar conflictes entre els agents que allí actuen. Aquesta constatació exposa problemes variats que poden afectar les obres d'art, des de l'adquisició, passant per la conservación i guarda i per la restauració pròpiament dita, fins a arribar a l'exhibició entre altres. L'enteniment del conservador com a gestor es proposa com una alternativa, que busca donar resposta als diversos problemes relacionats amb el procés de presa de decisions en benefici de les obres d'art. La hipòtesi defensada és la que el conservador, com a agent poseeïdor de les prerrogativas per a operar com a interlocutor polític en la interfície entre els diversos subsistemes del sistema museu, és l'agent que pot conduir les discussions i opinar sobre els diversos aspectes relacionats amb els objectes que confereixen identitat a la institució museu. D'aquesta manera, el canvi de paradigma proposat pot contribuir per a l'equilibri de l'ecosistema museu, en favor de tots els que allí comparteixen relacions de treball buscant el bé comú. / [EN] The aim of this doctoral research is to assert that the activity of the conservator of museological institutions is of great importance, emanating from a paradigm shift that places the conservator at the centre of discussions regarding decision-making on works of art belonging to the collections of these institutions. Starting from the presupposition that it is possible, by analogy, to compare the museum institution to an ecosystem, that is, as a larger system made up of several minor systems, it is intended to examine the relationships between conservators, acting within a specific subsystem, and various individuals acting within other subsystems. Museums, like other social fields, are spaces of social interaction in which hierarchical structures of power can generate conflicts between the individuals who participate in them. The acknowledgement of this exposes various problems that can affect works of art, from acquisition, through to conservation and storage and restoration itself, and even the exhibition of these works, amongst other things. As an alternative, it is proposed that the conservator must be recognised as a kind of manager, who seeks to react to the various problems related to the decision-making process for the benefit of the works of art. The hypothesis asserts that the conservator, as an individual possessing the power to operate as a political interlocutor at the interface between the various subsystems of the museum system, is the person best-placed to lead discussions and give opinions on the various aspects related to the objects that confer an identity upon the museum institution. Thus, the proposed paradigm shift can contribute to the balance of the museum ecosystem, to the benefit of all those who share working relationships there, in search of the common good. / Farias De Carvalho, H. (2022). El conservador como gestor: posibilidad de acción política en la interfaz institucional [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/190097

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This essay explores the different levels of scale used in Richard Powers’ novel The Overstory. The central thesis of this essay, “The Novel on a New Scale: Considering the World in a Tree’s Lifetime,” examines the different levels of scale, from the general concept to the particular scale of the novel as a medium, as well as the spatial and temporal scales of human and non-human entities in The Overstory. This exploration unfolds through four sections, each with its own sub-sections: Scale, History to Fiction, The Character and the Decentering of the Human, and the Temporal Scale.            By examining how The Overstory tackles the challenges of operating on multiple scales to provide an authentic narrative, this essay contributes to the emerging field of Anthropocene fiction. It further emphasizes the need to acknowledge multiple scales both as authors and readers, as they inherit the power to shift perspectives. Richard Powers is a novelist who successfully brings the natural world closer to his readers while truthfully addressing the critical issues of climate change and deforestation.

Ce travail étudie des modèles financiers pour les prix d'options, les taux d'intérêts et le risque de crédit, avec des processus stochastiques à mémoire et comportant des discontinuités. Ces modèles sont formulés en termes du mouvement Brownien fractionnaire, du processus de Lévy fractionnaire ou filtré (et doublement stochastique) et de leurs approximations par des semimartingales. Leur calcul stochastique est traité au sens de Malliavin, et des formules d'Itô sont déduites. Nous caractérisons les probabilités risque neutre en termes de ces processus pour des modèles d'évaluation d'options de type de Black-Scholes avec sauts. Nous étudions également des modèles de taux d'intérêts, en particulier les modèles de Vasicek, de Cox-Ingersoll-Ross et de Heath-Jarrow-Morton. Finalement nous étudions la modélisation du risque de crédit / This work investigates financial models for option pricing, interest rates and credit risk with stochastic processes that have memory and discontinuities. These models are formulated in terms of the fractional Brownian motion, the fractional or filtered Lévy process (also doubly stochastic) and their approximations by semimartingales. Their stochastic calculus is treated in the sense of Malliavin and Itô formulas are derived. We characterize the risk-neutral probability measures in terms of these processes for options pricing models of Black-Scholes type with jumps. We also study models of interest rates, in particular the models of Vasicek, Cox-Ingersoll-Ross and Heath-Jarrow-Morton. Finally we study credit risk models

O objetivo do presente trabalho é estudar o espaço e sua influência no modo de ser de algumas personagens do romance Mau tempo no Canal, de Vitorino Nemésio. Foram selecionadas Margarida Clark Dulmo e João Garcia, personagens centrais da obra. Para isso foram analisadas as diferentes tipologias espaciais no romance, ou seja, espaços abertos, fechados, interiores, exteriores e outros que se tornaram importantes para o desenvolvimento do tema proposto. / This master dissertation investigates space and its influence in the two main characters of the Vitorino Nemesios novel, Stormy Isles: An Azorian Tale, Margarida Clark Dulmo and João Garcia. In order to achieve its aim, different novel space typologies were analyzed, such as closed and open spaces as well as interiors and exteriors and many other important aspects to the development of the chosen theme.