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Video stabilization is an important aspect of video processing, especially for handheld devices where unintended camera movement can significantly degrade the resulting recording. This paper investigates four image based methods for video stabilization. The study explores the Lukas-Kanade, Inverse Compositional Lukas-Kanade, Farnebäck Optical Flow, and GMFlow methods, evaluating their sub-pixel accuracy, real-time performance, and robustness to in-frame motion such as a person walking in front of the camera. The results indicate that while all methods achieve sub-pixel precision, real-time execution on a mobile phone is not feasible with the current implementations. Furthermore, the methods exhibit varying levels of difficulty in handling in-frame motion, with RANSAC-based approaches partially compensating for non-camera-induced movement. The paper also discusses the potential of machine learning techniques, represented by GMFlow, in enhancing stabilization quality at the cost of computational complexity. The findings offer valuable insights for the development of more efficient and robust video stabilization solutions.

This dissertation is an intellectual history of the language of political economy in Mexico. It examines a period from the late eighteenth to the middle of the nineteenth century, through the writings of six individuals. I refer to political economy as a “political language” in the sense established by the Cambridge School of intellectual history, as a set of “idioms, rhetorics, forms of speaking about politics, distinctive language games, each one of which has its own vocabulary, rules, language, preconditions and implications as well as tone, and style.” My project is not a history of the Mexican economy or economic policy. Rather, it explores the persistent preoccupations, assumptions, and repertoires of image and metaphor that consciously or unconsciously informed debate, shaped political struggle, and drew the boundaries of the thinkable and sayable in the still-emerging sphere of the economy, while also drawing attention to the ways that political economy remained tightly interwoven with political and moral programs and values. Following the Polanyian premise that the economy is as much a cultural field as politics is, and that as culture, political and economic discourse are inseparable at the root, the dissertation as a whole makes a contribution to expanding Latin America’s “new political history” and “new intellectual history” into the realm of the economic. It also broadens the Cambridge School’s history of political thought and political economy to include Mexican interlocutors, who confronted the key political, economic, and philosophical questions of the eighteenth and nineteenth centuries in a different setting in historical space and time. Mexican thinkers creatively engaged the foundational issues of European political economy: commerce and monopoly, luxury and political virtue, industrial development and the role of institutions. But they also challenged established dogma and raised new questions: the significance of conquest and ongoing violence to the social order and national development; the woes of excessive inequality; the problem of latecomer development; and the questionable applicability of universalized theory. At a crucial moment in the transformation of Atlantic society, the language of political economy in Mexico was a vibrant site of creativity and contention that remains relevant today.

Visible and near-infrared diffuse reflectance spectroscopy has been demonstrated to be a fast and cheap tool for estimating a large number of chemical and physical soil properties, and effective features extracted from spectra are crucial to correlating with these properties. We adopt a novel methodology for feature extraction of soil spectroscopy based on fractal geometry. The spectrum can be divided into multiple segments with different step–window pairs. For each segmented spectral curve, the fractal dimension value was calculated using variation estimators with power indices 0.5, 1.0 and 2.0. Thus, the fractal feature can be generated by multiplying the fractal dimension value with spectral energy. To assess and compare the performance of new generated features, we took advantage of organic soil samples from the large-scale European Land Use/Land Cover Area Frame Survey (LUCAS). Gradient-boosting regression models built using XGBoost library with soil spectral library were developed to estimate N, pH and soil organic carbon (SOC) contents. Features generated by a variogram estimator performed better than two other estimators and the principal component analysis (PCA). The estimation results for SOC were coefficient of determination (R2) = 0.85, root mean square error (RMSE) = 56.7 g/kg, the ratio of percent deviation (RPD) = 2.59; for pH: R2 = 0.82, RMSE = 0.49 g/kg, RPD = 2.31; and for N: R2 = 0.77, RMSE = 3.01 g/kg, RPD = 2.09. Even better results could be achieved when fractal features were combined with PCA components. Fractal features generated by the proposed method can improve estimation accuracies of soil properties and simultaneously maintain the original spectral curve shape.

Made available in DSpace on 2016-04-25T19:20:25Z (GMT). No. of bitstreams: 1 Fernando Figueiredo de Sousa.pdf: 733635 bytes, checksum: 85ab8a5ec8f155d7406fe37c93f05c6a (MD5) Previous issue date: 2012-12-13 / This paper seeks to study the text of Lk 6, 20-26, of the beatitudes and of the woes, seeing in this passage an example of the recuperation, analysis and recreation of Jesus words. In this resides one of the particularities of this text in the context of the New Testament, which places it, however, in the heart of a fundamental direction of the beginnings of Christianity, namely, the tradition that goes back to Jesus by the conservation and transmission of his teachings. The author of this paper proposes the study of this text in three aspects. The first is the study of the text in of itself, as a communicative unity. The second aspect is the verification of the literature that influenced the Lucan author in the construction of this text, especially the Q source, and its comparison with words of the beatitudes attributed to the poor present in the Gospel of Thomas and the letter of James. In the third aspect, the author s intention is to analyze the importance of the writer of the Lucan text, his interference and the use of the blessed are and the woe to for the community. He considers that one of the accomplishments of the beatitudes is the approximation to the table as the instauration of the Kingdom of God, that is, the rich who share their wealth with the beggars. In this way, it is possible to verify an important connection between sharing with the beggars and belonging to the community, as a key element to becoming part of the Kingdom of God, the central element Jesus life and preaching, proposed by the beatitudes according to Luke / A presente pesquisa se aproxima do texto de Lc 6,20-26, das bem-aventuranças e dos ais, vendo nessa passagem um exercício de recuperação, análise e recriação de palavras de Jesus. Aí está uma das particularidades deste escrito dentro do Novo Testamento, que o coloca no seio de uma vertente fundamental dos inícios do cristianismo, isto é, a tradição que se vincula a Jesus pela conservação e transmissão de seus ensinamentos. O autor desta pesquisa propõe o estudo deste texto percorrendo três aspectos. O primeiro é o estudo do texto em si, como uma unidade comunicativa. O segundo consiste em verificar a literatura que influenciou o autor lucano na construção deste texto, especialmente a fonte Q, e a comparação desta com termos das bem-aventuranças atribuídas aos indigentes presentes no evangelho segundo Tomé e na carta de Tiago. No terceiro a proposta do autor é analisar a importância do redator do texto lucano, a sua interferência e o uso das bem-aventuranças e dos ais para o seio de sua comunidade. Considera que uma das realizações das bem-aventuranças é a aproximação da mesa como símbolo da instauração do Reino de Deus, isto é, a partilha dos bens dos ricos com os mendigos. Assim se verifica uma grande conexão entre o partilhar com os mendigos e a pertença à comunidade, constituindo um elemento-chave para fazer parte do Reino de Deus, elemento central da vida e pregação de Jesus proposto pelas bem-aventuranças segundo Lucas

La mondialisation financière des dernières décennies témoigne du phénomène du déséquilibre mondial dans lequel les comptes déficitaires actuels de certaines grandes économies avancées sont continuellement financés par certains pays en développement avec des taux de croissance élevés et des stocks de capitaux rares. Sur le plan théorique, le modèle de croissance néoclassique implique qu’une économie avec une pénurie de capitaux aurait un produit marginal élevé de capital et un taux d’intérêt élevé d’autarcie. Par conséquent, lors de l’intégration avec la capitale mobile gratuite, ce pays éprouverait les entrées nettes de capitaux nets afin que le taux d’intérêt domestique soit égal au reste du taux mondial (Lucas 1990). De plus, une économie qui se développe plus rapidement que le reste du monde aurait également une demande d’investissement plus élevée et devrait connaître les entrées de capitaux totaux nets (Gourinchas and Jeanne 2013). Les déséquilibres mondiaux sont le résultat de l’hétérogénéité des tendances de l’épargne et des investissements dans tous les pays. En effet, un pays connaît un apport de capitaux si son économie est inférieure à son investissement : ce pays emprunte au reste du monde si sa sauvegarde est supérieure à son investissement. La thèse emploierait la croissance de la productivité pour afficher les sources de lumière sur cette hétérogénéité entre les pays. [...] / The financial globalization for the past decades witnesses the global imbalance phenomenon on which the deficit current accounts by some large advanced economics are continuously financed by some developing economies with the high output growth rates and the scarce capital stocks. On the theoretical ground, the Neo-Classical growth model implies that one economy with scarcity of capital would have a high marginal product of capital and a high autarky interest rate therefore, at the integration with the free mobile capital, that country would experience the net total capital inflows so that the domestic interest rate equals that to the rest of world’s rate (Lucas 1990). Furthermore, one economy growing faster than the rest of the world would also have a higher investment demand and should experience the inflows of net total capitals (Gourinchas and Jeanne 2015). The global imbalances are the result of the heterogeneity in the patterns of savings and investments across countries. Indeed, one country experiences an inflow of capital if its saving is less that its investment: that country borrows from the rest of the world to finance the excess investment demand. Similarly, one country would lend to the rest of the world if its saving is higher than its investment. The thesis would employ the productivity growth to shed the refresh lights on this heterogeneity across countries. [...]

Visible and near-infrared diffuse reflectance spectroscopy has been demonstrated to be a fast and cheap tool for estimating a large number of chemical and physical soil properties, and effective features extracted from spectra are crucial to correlating with these properties. We adopt a novel methodology for feature extraction of soil spectroscopy based on fractal geometry. The spectrum can be divided into multiple segments with different step–window pairs. For each segmented spectral curve, the fractal dimension value was calculated using variation estimators with power indices 0.5, 1.0 and 2.0. Thus, the fractal feature can be generated by multiplying the fractal dimension value with spectral energy. To assess and compare the performance of new generated features, we took advantage of organic soil samples from the large-scale European Land Use/Land Cover Area Frame Survey (LUCAS). Gradient-boosting regression models built using XGBoost library with soil spectral library were developed to estimate N, pH and soil organic carbon (SOC) contents. Features generated by a variogram estimator performed better than two other estimators and the principal component analysis (PCA). The estimation results for SOC were coefficient of determination (R2) = 0.85, root mean square error (RMSE) = 56.7 g/kg, the ratio of percent deviation (RPD) = 2.59; for pH: R2 = 0.82, RMSE = 0.49 g/kg, RPD = 2.31; and for N: R2 = 0.77, RMSE = 3.01 g/kg, RPD = 2.09. Even better results could be achieved when fractal features were combined with PCA components. Fractal features generated by the proposed method can improve estimation accuracies of soil properties and simultaneously maintain the original spectral curve shape.

In the semestral thesis is given basic methods of non-contact measurement heart rate. There is explained Eulerian video magnification method deals with the visualization of the pulse in the videosequence of face. The semestral thesis describes algorithm Viola-Jones face detection in images and algorithm Kanade-Lucas-Tomasi for tracking faces in the videosequence. Part of the work includes design and realization of measurement. There is explained realization of the program and documented execution results, which are discussed. From the results it is designed to guide for optimal recording.

C'est un lieu commun de la critique que d'attribuer à Lucas Fernández, avec son maître Juan del Encina, la co-paternité du théâtre en langue castillane. Malgré cette place honorable dans l'histoire littéraire, rares sont les études à avoir tenté de mettre en lumière ce qui fait la spécificité même de son œuvre, à savoir sa théâtralité. Ce travail de thèse a comme objectif d'explorer le vaste champ de la théâtralité à travers la mise en relief du fonctionnement dramaturgique des pièces qui composent les Farsas y églogas (Salamanque, 1514), le seul recueil de pièces de cet auteur qui soit parvenu jusqu'à nous. Ainsi commençons-nous par l'analyse des potentialités du texte dramatique en termes de gestuelle et plus largement, de communication non verbale, domaine englobant des signes hétérogènes comme le corps du personnage, les regards échangés, les attitudes physionomiques ou les déplacements. Nous poursuivons par l'étude du cadre de la fiction dramatique, en portant une attention particulière à la façon dont les oppositions spatiales concourent à doter les pièces de leur signification globale. Enfin, notre travail s'achève sur la description des mécanismes d'écriture du dialogue dramatique, en s'inspirant des apports méthodologiques de l'analyse du discours, et tout particulièrement de l'approche pragmatique et énonciativiste. Ce dernier versant de l'étude nous permet, par l'exploration de ce que Michel Vinaver appelle la « surface » des répliques, de montrer la variété des stratégies dramatiques de Lucas Fernández, dont l'œuvre, au-delà du primitivisme qu'on lui attribue du fait de ses intrigues réduites, s'avère résolument ancrée dans un « théâtre de la parole » aux accents particulièrement modernes.

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