Este trabalho realizou um estudo sobre a aplicação de algoritmos de inversão da forma de onda completa (FWI) sobre dados de sísmica de reflexão em uma escala rasa ( 0 100 m de profundidade). A FWI foi estudada com o fim de melhorar as velocidades estimadas através do processamento de reflexão PP e PS convencional. Para um melhor entendimento da resposta obtida por este tipo de problema, a inversão foi avaliada sobre dados sintéticos por métodos de busca global e local. Na busca global foi utilizado o algoritmo de Evolução Diferencial que é uma variante de um algoritmo genético. O intuito da busca global foi avaliar a sensibilidade da função objetivo para cada parâmetro do modelo em diferentes janelas de afastamentos em relação à fonte. Na busca local foi utilizado um algoritmo de gradiente conjugado para a estimativa 2D dos parâmetros do meio. Dentre os principais resultados têm-se que a função objetivo é mais sensível aos parâmetros em janelas de afastamentos próximas da fonte. Em tais janelas, dominadas por ondas superficiais, a velocidade da onda S é facilmente estimada. Entretanto, mesmo em janelas mais afastadas a velocidade da onda S é o parâmetro do modelo que se destaca em relação aos demais. Já a busca por todos os parâmetros concomitantemente mostrou-se difícil e implicaria na necessidade de mais iterações do algoritmo de inversão. O método também foi aplicado em dados reais adquiridos no terreno do Instituto de Física da USP. A FWI foi aplicada nestes dados buscando apenas pelos valores de Vs, mantendo os valores de Vp e densidade fixos. A aplicação do algoritmo 2D nestes dados resultaram em valores de Vs coerentes com as velocidades observadas em um ensaio downhole na área. Concluindo, os resultados apresentados na tese mostram que a FWI é aplicável para a melhoria do modelo de velocidade da onda S obtido através do processamento de eventos de reflexão PP e PS. / This work carried out a study on the application of full waveform inversion algorithms (FWI) on reflection seismic data on a shallow scale (0 - 100 m depth). FWI has been studied in order to improve estimated velocities through conventional PP and PS reflection processing. For a better understanding of the response obtained by this type of problem the inversion was evaluated by global and local search methods. In the global search the algorithm employed was the Differential Evolution which is a variant of a genetic algorithm. The aim of the global search was to evaluate the sensitivity of the objective function for each parameter of the model in different windows of distance from the source. In the local search a conjugate gradient algorithm was used for a 2D estimate of the medium parameters. Among the main results is the fact that in a suitable window, for a reflection data acquisition the sensitivity is reduced in relation to a window with geophones closer to the source. However, even in more distant windows the velocity of the S wave is the parameter of the model that stands out in relation to the others. The concomitant search for all parameters at the same time is still difficult and implies the need for more iterations of the inversion algorithm. The method was also applied in a data acquired in the field of the Institute of Physics of USP. The results of the application of the 2D algorithm for this data showed modifications of the provided initial model for a velocity of the S wave coherent with the observed velocities in downhole and lithological informations from this area. In conclusion, the results found that FWI is applicable to improve the S-wave velocity model obtained by processing PP and PS reflection events.

Este trabalho realizou um estudo sobre a aplicação de algoritmos de inversão da forma de onda completa (FWI) sobre dados de sísmica de reflexão em uma escala rasa ( 0 100 m de profundidade). A FWI foi estudada com o fim de melhorar as velocidades estimadas através do processamento de reflexão PP e PS convencional. Para um melhor entendimento da resposta obtida por este tipo de problema, a inversão foi avaliada sobre dados sintéticos por métodos de busca global e local. Na busca global foi utilizado o algoritmo de Evolução Diferencial que é uma variante de um algoritmo genético. O intuito da busca global foi avaliar a sensibilidade da função objetivo para cada parâmetro do modelo em diferentes janelas de afastamentos em relação à fonte. Na busca local foi utilizado um algoritmo de gradiente conjugado para a estimativa 2D dos parâmetros do meio. Dentre os principais resultados têm-se que a função objetivo é mais sensível aos parâmetros em janelas de afastamentos próximas da fonte. Em tais janelas, dominadas por ondas superficiais, a velocidade da onda S é facilmente estimada. Entretanto, mesmo em janelas mais afastadas a velocidade da onda S é o parâmetro do modelo que se destaca em relação aos demais. Já a busca por todos os parâmetros concomitantemente mostrou-se difícil e implicaria na necessidade de mais iterações do algoritmo de inversão. O método também foi aplicado em dados reais adquiridos no terreno do Instituto de Física da USP. A FWI foi aplicada nestes dados buscando apenas pelos valores de Vs, mantendo os valores de Vp e densidade fixos. A aplicação do algoritmo 2D nestes dados resultaram em valores de Vs coerentes com as velocidades observadas em um ensaio downhole na área. Concluindo, os resultados apresentados na tese mostram que a FWI é aplicável para a melhoria do modelo de velocidade da onda S obtido através do processamento de eventos de reflexão PP e PS. / This work carried out a study on the application of full waveform inversion algorithms (FWI) on reflection seismic data on a shallow scale (0 - 100 m depth). FWI has been studied in order to improve estimated velocities through conventional PP and PS reflection processing. For a better understanding of the response obtained by this type of problem the inversion was evaluated by global and local search methods. In the global search the algorithm employed was the Differential Evolution which is a variant of a genetic algorithm. The aim of the global search was to evaluate the sensitivity of the objective function for each parameter of the model in different windows of distance from the source. In the local search a conjugate gradient algorithm was used for a 2D estimate of the medium parameters. Among the main results is the fact that in a suitable window, for a reflection data acquisition the sensitivity is reduced in relation to a window with geophones closer to the source. However, even in more distant windows the velocity of the S wave is the parameter of the model that stands out in relation to the others. The concomitant search for all parameters at the same time is still difficult and implies the need for more iterations of the inversion algorithm. The method was also applied in a data acquired in the field of the Institute of Physics of USP. The results of the application of the 2D algorithm for this data showed modifications of the provided initial model for a velocity of the S wave coherent with the observed velocities in downhole and lithological informations from this area. In conclusion, the results found that FWI is applicable to improve the S-wave velocity model obtained by processing PP and PS reflection events.

Neste trabalho, foi estudado o comportamento reológico nos regimes de viscoelasticidade linear (VEL) e não linear (VENL) da mistura polimérica de polimetacrilato de metila/poliestireno (PMMA/PS), compatibilizada ou não com os copolímeros: estatístico P(S-co-MMA) (VEL e VENL) e bloco P(S-b-MMA) (VEL). No estudo do comportamento de VEL, ensaios de cisalhamento oscilatório de pequenas amplitudes (COPA) foram realizados utilizando-se um reômetro de tensão controlada. O comportamento de VEL das misturas poliméricas foi comparado com os modelos teóricos de Bousmina[1] e generalizado de Palierne[2]. Os tempos de relaxação das misturas poliméricas foram obtidos analisando o comportamento reológico no regime de VEL utilizando o software desenvolvido por Honerkamp e Weese[3]. Os tempos obtidos foram comparados com o modelo de Jacobs et al.[4]. O estudo do comportamento de VENL foi conduzido através de ensaios de relaxação de tensão utilizando-se um reômetro de deformação controlada. Os resultados do comportamento reológico no regime de VEL indicaram a presença de quatro tempos de relaxação, para as blendas compatibilizadas com P(S-co- MMA) (composições menores de 10% de fase dispersa e concentrações maiores de 4% de copolímero): dois picos relacionados às fases puras; F, relacionado com a relaxação das gotas da fase dispersa e o relacionado com a relaxação do compatibilizante na interface entre as fases matriz e dispersa. Os valores experimentais de F e foram utilizados para os cálculos de tensão interfacial () e do módulo complexo de interface () das blendas poliméricas compatibilizadas. Os resultados indicaram uma diminuição de com o aumento da concentração de copolímero. Os resultados do comportamento reológico no regime de VEL, para as blendas compatibilizadas com P(S-b-MMA), também apresentaram a presença de quatro tempos de relaxação. Observou-se que o aumento da adição de P(S-b-MMA) proporcionou uma redução no .. Os resultados de VENL de relaxação de tensão mostraram a presença de três fenômenos de relaxação, relacionados com: 1) as fases puras, 2) a relaxação das gotas da fase dispersa e um terceiro mais rápido. A adição de P(S-co-MMA) resultou numa diminuição do processo de relaxação das gotas da fase dispersa. / In this work, the dynamic behavior of polymethylmetacrylate/polystyrene (PMMA/PS) blends to which P(S-co-MMA) was added was studied. Several blend composition and copolymer concentrations were studied. The rheological behavior of blends was compared to Bousminas[1] and Paliernes generalized[2] models. The relaxation spectra of the blends were also inferred, and the results were analyzed in light of the analysis of Jacobs et al.[4]. The relaxation spectra of the blends with smaller dispersed phase (below 10 wt%) and larger copolymer concentrations (above 0.4 wt%) showed the presence of four relaxation times, two corresponding to the blend phases, F, corresponding to the relaxation of the shape of the dispersed phase of the blend, and , that can be attributed to the relaxation of Marangoni stresses tangential to the interface between the dispersed phase and matrix. The experimental values of F and were used to infer the interfacial tension () and the interfacial complex shear modulus () for the different blends, decreased with increasing copolymer concentration. decreased with increasing blend dispersed phase concentration and decreasing copolymer concentration. The predictions of Paliernes generalized model were found to corroborate the experimental data once the values of and found analyzing the relaxation spectra were used in the calculations. Bousminas model was found to corroborate the data only for larger dispersed phase concentration. The stress relaxation behavior of PMMA/PS blends with or without random copolymer addition, submitted to step shear strain experiments in the linear and nonlinear regime was studied. The effect of blend composition, viscosity ratio and random copolymer was evaluated. All blends presented three relaxation stages, a first relaxation which was attributed to the relaxation of the pure phases, a second one which was characterized by the presence of plateau and a third fast one.

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The field of automation and smart devices is currently expanding. As most devices require wireless communication, the market for low budget, low power radios is growing rapidly. Many applications, such as the remote control of machines, have real time requirements with minimal latency. In this report, the market of wireless chips in the sub-GHz region has been investigated in order to give Syntronic AB an insight of the current market. Several key features such as range, data rate and output power were ranked among the available chips. To provide Syntronic with a marketing tool when reaching out to customers in the remote control field, a demonstration prototype (demo) was implemented using one of the radio chips from the list. The demo shows real time requirements with low latency between two wireless nodes. The first node takes movement data from a computer mouse and transmits it to the other node controlling an array of light emitting diodes (LEDs). This report contains the selection of radio configurations, design of a new wireless communications protocol, and implementation of the system in hardware and software. Measurements show a latency of 3.6 ms and a range of approximately 450 m which is regarded satisfactory.

This thesis seeks to destabilize many of the hierarchical boundaries established by the recent critical projects surrounding “female modernism” and “middlebrow” fiction by highlighting two authors, Antonia White and Emily Holmes Coleman, who have been neglected precisely because their works challenge the boundaries of these literary classifications. The thesis suggests that White’s and Coleman’s texts seemingly defy this categorization specifically through the portrayal of psychosis, the threat and experience of which permeates their texts and the way in which this impacts the construction of female subjectivity. “Female modernism”, “middlebrow” fiction, and “fictions of madness” often appear to be at odds with one another, but a close examination of White’s and Coleman’s texts suggests that these boundaries are not impermeable. Chapters One and Two seek to contextualize White’s and Coleman’s texts within these critical arguments and gesture towards the following chapters which demonstrate the extent to which these texts are specifically concerned with testing and exploring boundaries in the formation of female subjectivity, specifically through the experience of psychosis. It is their alternating acceptance of and challenge to these boundaries which contributes to the mis-placement of their texts within literary classifications. Chapters Three, Four, and Five explore the fortification and dissolving of the boundaries of female subjectivities as represented in White’s and Coleman’s texts. Chapter Three examines the relationship between mother and daughter in the texts specifically through the process of maternity. It argues that the process of maternity challenges female subjectivity in such a way that is best understood if it is contextualized within Julia Kristeva’s conception of the abject. Chapter Four addresses the textual representation of psychosis as a dissolution of subjectivity which is analysed using the theories of Luce Irigaray. Chapter Five acts as a counter-balance to this by exploring the ways in which female subjectivity is positively constructed in the texts, specifically through the presentation of Catholicism. In combination, each of these thematic elements which explore and test various boundaries result in a body of texts which defy the boundaries of “female modernism”, the “middlebrow”, and “fictions of madness”. The thesis concludes by suggesting that it is those texts which were written in the 1950s and therefore contain elements which are characteristic of the culture of that decade which present the greatest problem for the categorization of these texts. It suggests that the literature of this decade, particularly literature written by women, deserves greater consideration to separate it more fully from the existing literary classifications which struggle to contain it.

This thesis demonstrates how selected texts by J.G. Ballard—Crash (1973), Concrete Island (1974) and High‐Rise 1975)—and Kurt Vonnegut—Player Piano (1952), Slaughterhouse‐Five(1969) and Galápagos (1985)—can be considered in terms of theoretical stances derived from posthumanism. By analysing representations of the ‘human’ in relation to both the ‘machine’ and the ‘evolutionary human animal’, this thesis illustrates the emergence of the posthuman subject. In addition, by recognising the intersection between posthumanism and evolutionary theory, a wider project of this thesis involves demonstrating how the use of various theoretical approaches, from the ‘humanities’ and the ‘sciences’, contributes to the formation of a ‘posthumanities’ approach to literature. J.G. Ballard and Kurt Vonnegut consistently present fictional scenarios in which the lines between ‘human’, ‘machine’ and ‘evolutionary animal’ are disrupted and blurred. Depictions assume various triangulations and configurations: from the protagonist Ballard’s auto‐eroticism, to the characters of High‐Rise conflating boundaries between the ‘human’ and the evolutionary animal that is conveyed as a constituent of human identity, as well as between the machinic environment and the human inhabitant. Further,comparable configurations characterise Vonnegut’s texts: Player Piano’s Paul Proteus’ war against the machine is superimposed by human affiliation with the machine, and the castaway characters of Galápagos are stranded by evolutionary forces that displace human authority and control to the uttermost limit. Each of these instances contributes to the effective intervention of posthumanist thinking when reading the texts. In addition, the utilisation of evolutionary concepts derived from contemporaneous publications circulating in the cultural and scientific sphere highlights the usefulness of acknowledging sources from beyond the remit of traditional literary studies’ methodologies when reading texts. The triangulation between literature, posthumanism and evolutionary theory results in a reconfigured methodological approach to fictional texts: the posthumanities.

To our best knowledge this is the first attempt to investigate translation of the stylistic features involved in an interesting masterpiece of American literature, The Old Man and the Sea, written by Ernest Hemingway. This story has been translated into Arabic twice, first by Munir Ba'labaki and second by Dr Ziad Zakariyya. This thesis attempts to explore problems of literary translation from English into Arabic. It seeks to investigate some aspects of culture and style in The Old Man and the Sea and the two Arabic translations. The aim is to assess how much of the style and culture of the original has been preserved. It is also concerned with the problem of equivalence and translation units, since equivalence is considered the tool for detailed comparison. Chapter One deals with various approaches to evaluation of translation. This is done by reviewing a number of notions which have dominated the field of translation for a long time. One school believes that the act of translation is an art and that evaluation is limited to the aesthetic values of a literary work and depends largely on the critic's subjective decisions. Its objective is to provide a list of rules for the translator to follow in order to arrive at a translation of optimal value. The other school approaches translation as a linguistic operation and considers that a translation should be judged objectively, according to a linguistic analysis based on equivalence of the ST and the TT. Proponents of this view have developed models for evaluating. These models are addressed. Chapter Two is concerned with a review of certain concepts which are fundamental to literary translation. It attempts to highlight the theoretical approaches to the notion of 'equivalence', such as formal vs. dynamic and semantic vs. communicative equivalence, and different approaches to the question of translation units.

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