963 resultados para ECG reception
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http://digitalcommons.fiu.edu/com_images/1007/thumbnail.jpg
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http://digitalcommons.fiu.edu/com_images/1006/thumbnail.jpg
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Reception for the Coral Gables Museum exhibit of "Beyond Swastika and Jim Crow" held at Florida International University on October 26,2014
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General note: Title and date provided by Bettye Lane.
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General note: Title and date provided by Bettye Lane.
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Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.
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Magnetic field inhomogeneity results in image artifacts including signal loss, image blurring and distortions, leading to decreased diagnostic accuracy. Conventional multi-coil (MC) shimming method employs both RF coils and shimming coils, whose mutual interference induces a tradeoff between RF signal-to-noise (SNR) ratio and shimming performance. To address this issue, RF coils were integrated with direct-current (DC) shim coils to shim field inhomogeneity while concurrently emitting and receiving RF signal without being blocked by the shim coils. The currents applied to the new coils, termed iPRES (integrated parallel reception, excitation and shimming), were optimized in the numerical simulation to improve the shimming performance. The objectives of this work is to offer a guideline for designing the optimal iPRES coil arrays to shim the abdomen.
In this thesis work, the main field () inhomogeneity was evaluated by root mean square error (RMSE). To investigate the shimming abilities of iPRES coil arrays, a set of the human abdomen MRI data was collected for the numerical simulations. Thereafter, different simplified iPRES(N) coil arrays were numerically modeled, including a 1-channel iPRES coil and 8-channel iPRES coil arrays. For 8-channel iPRES coil arrays, each RF coil was split into smaller DC loops in the x, y and z direction to provide extra shimming freedom. Additionally, the number of DC loops in a RF coil was increased from 1 to 5 to find the optimal divisions in z direction. Furthermore, switches were numerically implemented into iPRES coils to reduce the number of power supplies while still providing similar shimming performance with equivalent iPRES coil arrays.
The optimizations demonstrate that the shimming ability of an iPRES coil array increases with number of DC loops per RF coil. Furthermore, the z direction divisions tend to be more effective in reducing field inhomogeneity than the x and y divisions. Moreover, the shimming performance of an iPRES coil array gradually reach to a saturation level when the number of DC loops per RF coil is large enough. Finally, when switches were numerically implemented in the iPRES(4) coil array, the number of power supplies can be reduced from 32 to 8 while keeping the shimming performance similar to iPRES(3) and better than iPRES(1). This thesis work offers a guidance for the designs of iPRES coil arrays.
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This dissertation examines the publication history of a single work: John Calvin’s 1552 Quatre sermons de M. Jehan Calvin traictans des matières fort utiles pour nostre temps, avec briefve exposition du Pseaume lxxxvii. Overlooked for both its contribution to Calvin’s wider corpus and its surprising popularity in English translation, successive editions of Quatre sermons display how Calvin’s argument against the behavior of so-called “Nicodemites” was adapted to various purposes unrelated to refuting religious dissimulation. The present study contributes to research in Calvin’s anti-Nicodemism by highlighting the fruitfulness of focusing on a discrete work and its reception. Borrowing a term (“Newter”) from John Field’s 1579 translation of Quatre sermons, this study’s title adumbrates its argument. English translators capitalized on the intrinsic malleability of a nameless and faceless opponent, the Nicodemite, and the adaptability of Quatre sermons’ genre as a collection of sermons to reshape—or, if you will, disfigure—both Calvin’s original foes and his case against them to advance various new agenda. Yet they were not the first to use the reformer’s sermons this way. They could have learned this from Calvin himself.
My examination of Quatre sermons opens by setting the work in the context of Calvin’s other writings and his political situation (Introduction, chapters one and two). Calvin’s unrelenting literary assault on French Nicodemism over three decades has long been recognized for its consistency and negativity. Yet scholars have tended to neglect how Calvin’s polemic against religious dissimulation could exhibit significant flexibility according to the needs of his context. Whereas Calvin’s preface promises simply to revisit his previous argument against participation in the Mass, his approach to Nicodemism in Quatre sermons seems adapted to accomplish goals beyond decrying false worship, offering a carefully-crafted apology for Calvin’s pastoral authority directed at his political situation. Repeatedly emphasizing God’s purpose to bless his children through the ministry of a rightly-ordered church, Quatre sermons marks a shift in Calvin’s anti-Nicodemite rhetoric away from purely negative critique, stressing instead God’s provision of spiritual nurture via political exile. Read in light of Calvin’s 1552 context, two audiences emerge: sermons ostensibly targeting believers in France who hid their faith also appear especially designed to silence Calvin’s foes in Geneva.
The remainder of the study examines the reception of Quatre sermons in the rapidly shifting religious and social contexts of Marian and Elizabethan England, where it appeared in more unique editions than any of Calvin’s writings besides the Institutio and the reformer’s 1542/45 Genevan Catechism. Calvin’s anti-Nicodemism has not been examined for its distinct contribution to the overall English reception of his thought. Five English versions of Quatre sermons appeared between 1553 and 1584—four of these under a Protestant queen, a situation quite different from the French context Calvin addressed. After situating Calvin’s position within the currents of Tudor Protestant anti-Nicodemism (chapter three), I place each of the five translations in its particular context, investigating prefaces, appendices, marginalia, and translation methods to discover how and why individuals used Quatre sermons (chapters four to six). Like Calvin in 1552, those who brought Quatre sermons to English readers were not primarily concerned with Nicodemism. Rather, the malleability of Calvin’s Nicodemite as polemical opponent and the flexibility of Quatre sermons as a sequence of discrete, interrelated parts made it popular with those eager to press Calvin into the service of a variety of diverse goals he could not have imagined, including turning his anti-Nicodemism against fellow members of the English church.
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This dissertation seeks to identify what makes Cicero’s approach to politics unique. The author's methodology is to turn to Cicero’s unique interpretation of Plato as the crux of what made his thinking neither Stoic nor Aristotelian nor even Platonic (at least, in the usual sense of the word) but Ciceronian. As the author demonstrates in his reading of Cicero’s correspondences and dialogues during the downward spiral of a decade that ended in the fall of the Republic (that is, from Cicero’s return from exile in 57 BC to Caesar’s crossing of the Rubicon in 49 BC), it is through Cicero's reading of Plato that the former develops his characteristically Ciceronian approach to politics—that is, his appreciation for the tension between the political ideal on the one hand and the reality of human nature on the other as well as the need for rhetoric to fuse a practicable compromise between the two. This triangulation of political ideal, human nature, and rhetoric is developed by Cicero through his dialogues "de Oratore," "de Re publica," and "de Legibus."
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Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.
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En el presente trabajo indagamos el significado de los conceptos de "doctrina" y "tradición" en las reflexiones de Benjamin hacia 1917, íntimamente vinculados con su recepción de Kant. Los escasos análisis de tal recepción relegan este aspecto. Intentamos mostrar que estos conceptos expresan un interés por la idea kantiana de unidad sistemática del conocimiento, y sostenemos que Benjamin reinterpreta tal unidad en términos mesiánicos: ya no como un supuesto necesario, sino como una exigencia de redención. Finalmente, exhibimos de qué modo estas nociones se hallan implícitas en el escrito "Sobre el programa de una filosofía futura"
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Hypertrophic cardiomyopathy (HCM) is a cardiovascular disease where the heart muscle is partially thickened and blood flow is - potentially fatally - obstructed. It is one of the leading causes of sudden cardiac death in young people. Electrocardiography (ECG) and Echocardiography (Echo) are the standard tests for identifying HCM and other cardiac abnormalities. The American Heart Association has recommended using a pre-participation questionnaire for young athletes instead of ECG or Echo tests due to considerations of cost and time involved in interpreting the results of these tests by an expert cardiologist. Initially we set out to develop a classifier for automated prediction of young athletes’ heart conditions based on the answers to the questionnaire. Classification results and further in-depth analysis using computational and statistical methods indicated significant shortcomings of the questionnaire in predicting cardiac abnormalities. Automated methods for analyzing ECG signals can help reduce cost and save time in the pre-participation screening process by detecting HCM and other cardiac abnormalities. Therefore, the main goal of this dissertation work is to identify HCM through computational analysis of 12-lead ECG. ECG signals recorded on one or two leads have been analyzed in the past for classifying individual heartbeats into different types of arrhythmia as annotated primarily in the MIT-BIH database. In contrast, we classify complete sequences of 12-lead ECGs to assign patients into two groups: HCM vs. non-HCM. The challenges and issues we address include missing ECG waves in one or more leads and the dimensionality of a large feature-set. We address these by proposing imputation and feature-selection methods. We develop heartbeat-classifiers by employing Random Forests and Support Vector Machines, and propose a method to classify full 12-lead ECGs based on the proportion of heartbeats classified as HCM. The results from our experiments show that the classifiers developed using our methods perform well in identifying HCM. Thus the two contributions of this thesis are the utilization of computational and statistical methods for discovering shortcomings in a current screening procedure and the development of methods to identify HCM through computational analysis of 12-lead ECG signals.
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This paper is based on the novel use of a very high fidelity decimation filter chain for Electrocardiogram (ECG) signal acquisition and data conversion. The multiplier-free and multi-stage structure of the proposed filters lower the power dissipation while minimizing the circuit area which are crucial design constraints to the wireless noninvasive wearable health monitoring products due to the scarce operational resources in their electronic implementation. The decimation ratio of the presented filter is 128, working in tandem with a 1-bit 3rd order Sigma Delta (ΣΔ) modulator which achieves 0.04 dB passband ripples and -74 dB stopband attenuation. The work reported here investigates the non-linear phase effects of the proposed decimation filters on the ECG signal by carrying out a comparative study after phase correction. It concludes that the enhanced phase linearity is not crucial for ECG acquisition and data conversion applications since the signal distortion of the acquired signal, due to phase non-linearity, is insignificant for both original and phase compensated filters. To the best of the authors’ knowledge, being free of signal distortion is essential as this might lead to misdiagnosis as stated in the state of the art. This article demonstrates that with their minimal power consumption and minimal signal distortion features, the proposed decimation filters can effectively be employed in biosignal data processing units.
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The Luce newsreel was a fascist-pivotal propaganda instrument. Mussolini thought movies were the strongestweapon; however, the efficiency of cinematographic propaganda on people did not work as well as expected,especially nonfiction. This article intends to value, through oral testimonies, the influence of Lucenewsreel on the Italian population during fascism, the degree of truth of film news, and which of those piecesof news were more repeated, as well as the influence of the Italian and its leader image on the collective mind.