Numerical Simulations for the Design of Novel Integrated Parallel Reception, Excitation, and Shimming (iPRES) Coil Arrays

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.

Simply Genre Films: Extracting “King Lear” from “House of Strangers” and “Broken Lance"

The purpose of this thesis is to evaluate and refute Yvonne Griggs’ claims that the films “House of Strangers” (1949) and “Broken Lance” (1954) are as Griggs deems “genre-based adaptations” of William Shakespeare’s “King Lear.” I argue that the films, although they have some essential elements of “King Lear,” lack intentionality and reception, pivotal components in determining viability as a Shakespearean film adaptation. Using Griggs’ book as my critical background, I will show that these films are better classified under their respective genre categories, Western and film noir, not as “King Lear” genre adaptations. I will also suggest criteria for determining the level of canonicity of a “King Lear” film adaptation. Popularity of films does not determine validity, and a film does not need purported Shakespearean provenance to validate its ratings. Some films, like these, merely reference or pay homage to Shakespeare through use of essential elements of “King Lear”; here, I deem such affinities to be more unintentional than intentional.

“By Looking Liking”: Baz Luhrmann's William Shakespeare's Romeo+Juliet

Twenty years since its release onto the big screen, Baz Luhrmann’s William Shakespeare’s Romeo+Juliet continues to attract viewers, divide critics and remain unchallenged, in a league of its own, when it comes to film adaptation of Shakespeare’s plays. This article begins with taking stock of reception directions which still dispute the field of film adaptation. Cued by Worthen’s “Performance Paradigm”, my argument positions Luhrmann’s film (his second at the time and the one to propel the Australian director into Hollywood fame) firmly in the cinematic and sees the film narrative not as opposed to the textual and/or spoken one, but as a complex citational practice developed at the level of oral, visual and written discourse.

Pyramus and Thisbe 4 You or a "Wondrous Strange" Tale of Contemporary Romanian Theatre

Like its title, Pyramus and Thisbe 4 You, Alexandru Dabija’s production at the Odeon Theatre, Bucharest, was a tongue-in-cheek invitation to the audience that at once aimed to tease past and recent Romanian endeavours and to tease out the stage potential a Shakespeare play holds today. My examination of the production re-constructs the local cultural contexts the production plays with and against, referring to the Romanian ways of making Shakespeare this production enters into dialogue with. Take 1, an all-female version casting the mature stars of the Odeon, I read against both Elizabethan all-male stage practice and Andrei Serban’s all-female Lear at the Bulandra (2008). Take 2, “an old device” (V.1.50): a teacher-student “devising” session at the Academy of Theatre and Cinema, I read against critics’ “more strange than true” (V.1.2) parlance on “theories of perception and reception” and against hi-tech Shakespeare dominating the Romanian stages in the first decade of the third millennium. Take 3, local political banter on ethnic discrimination, I read as “satire keen and critical” (V.1.54) on both communist censorship and the recent rise of nationalism in Romania. Take 4, a “cold” reading-cum-improvisation performed by the technical crew – this production’s mechanicals – I read as “palpable-gross play” (V.1.376) on both acting and spectating practices. What I argue in this article is that Dabija’s production goes beyond its local context and mores, and proposes a re-assessment of Shakespeare’s cultural currency in (European) Romania and Europe at large by exposing current tyrannies in Shakespeare studies: from translation and adaptation, through directing and acting, to viewing and reviewing.

”By my Lords comand, I am to acquainte you”: An Edition of the Seventeenth-Century Correspondence of the Wentworth Family in the Folger Shakespeare Library

This thesis is an edition of the correspondence of the Yorkshirean Wentworth family. The aim of the edition is to provide these handwritten manuscripts to a wider audience by transcribing them. The material has been acquired from the Folger Shakespeare Library, and the transcriptions presented in this thesis are a part of their database called Early Modern Manuscripts Online. My material consists of fifteen documents from the early modern period which have been sent to or sent by members of the Wentworth family. Fourteen of these documents are letters, and one is a warrant written in the form of a letter. In the Folger Shakespeare Library the documents form the section 2.1. Correspondence of the Wentworth family in a larger collection called Papers of the Cavendish-Talbot family. The documents have been transcribed diplomatically in order to retain the character of the original manuscripts. In addition to the transcriptions, background chapters on letter writing, the historical and linguistic context, and palaeography are provided. Furthermore, each text includes a commentary containing a brief summary of the text and a description of the manuscript. Notes concerning specific words or concepts are also provided to make the texts easier to understand. Additionally, the transcriptions are encoded in XML for the purposes of the Folger Shakespeare Library. These earlier unedited manuscripts reassert the status of the Wentworth family in the early modern English society and provide information about letter writing conventions, language, and palaeographical conventions in early modern England. This edition can be used in further studies, for example as part of a larger corpus.

Shakespeare at the Festival d'Avignon : the Poetics of Adaptation of L. Lagarde (Richard III, 2007), T. Ostermeier (Hamlet, 2008) and I. van Hove (The Roman Tragedies, 2008)

International audience

"Richard II" in the Honour Court of the Papal Palace: Forgetting Shakespeare in order to find him?

International audience

Bringing the state to England: Andrew Tooke's translation of Samuel Pufendorf's 'De officio hominis et civis'

Andrew Tooke's 1691 English translation of Samuel Pufendorf's De officio hominis et civis, published as The Whole Duty of Man According to the Law of Nature, brought Pufendorf's manual fo statist natural law into English politics at a moment of temporary equilibrium in the unfinished contest between Crown and Parliament for the rights and powers of sovereignty. Drawing on the authors' re-edition of The Whole Duty of Man, this article describes and analyses a telling instance of how--by translation--the core political terms and concepts of the German natural jurist's 'absolutist' formulary were reshaped for reception in the different political culture of late seventeenth-century England.

Analysis of acousto-ultrasonic characteristics for contact-type transducers coupled to composite laminated plates

The acousto-ultrasonic (AU) input-output characteristics for contact-type transmitting and receiving transducers coupled to composite laminated plates are considered in this paper. Combining a multiple integral transform method, an ordinary discrete layer theory for the laminates and some simplifying assumptions for the electro-mechanical transduction behaviour of the transducers, an analytical solution is developed which can deal with all the wave processes involved in the AU measurement system, i.e, wave generation, wave propagation and wave reception. The spectral response of the normal contact pressure sensed by the receiving transducer due to an arbitrary input pulse excited by the transmitting transducer is obtained. To validate the new analytical-numerical spectral technique in the low-frequency regime, the results are compared with Mindlin plate theory solutions. Based on the analytical results, numerical calculations are carried out to investigate the influence of various external parameters such as frequency content of the input pulse, transmitter/receiver spacing and transducer aperture on the output of the measurement system. The results show that the presented analytical-numerical procedure is an effective tool for understanding the input-output characteristics of the AU technique for laminated plates. (C) 2001 Elsevier Science Ltd. All rights reserved.

What influences the functional outcome of children at 6 months post-burn?

The contribution of demographic, injury, pre-morbid, and parent factors to a child's functional outcome at 6 months post-burn injury was examined. Sixty-eight children, aged 5-14 years with percent total body surface area (%TBSA) burns ranging from

Historical and conceptual landscape of the character

This paper was developed with the intention of broadly demonstrating the complexity of the area known recently as character development, as a creative process methods and implementation. It searches the understanding of the character itself, its place in the narrative and its reception by the reader or target audience. It is a multidisciplinary tool that faces a multitude of challenges from an increasingly demanding public and with specific goals in mind, and yet it also gives us valuable insight over how we interact with one another and the world around us, teaching us how to transfer such knowledge into fiction promoting empathic bonds between the reader and the characters. The human tendency to create is limitless and as old as mankind itself, we create, recreate and reinterpret and then populate such tales with believable characters from who we learn, and experience events and tales that shape our very lives.

The telegraph as an omen of the future in James W. Carey's vision

In the history of modern communication, after the development of the printing press, the telegraph unleashed a revolution in communications. Today, Internet is in many ways its heir. Reflections on the telegraph may open up perspectives concerning tendencies, possibilities and pitfalls of the Internet. The telegraph has been well explored in important literature on communication and media which tends to emphasize the history of this technology, its social context and institutional meaning [e.g. Robert L. Thompson, 1947, Tom Standage, 2007 [1998]. James W. Carey, the North- American critical cultural studies' mentor, in his essay "Technology and Ideology. The Case of the Telegraph" (2009 [1983]), suggests a distinctive approach. In the telegraph, Carey sees the prototype of many subsequent commercial empires based on science and technology, a pioneer model for complex business management; an example of interest struggle for the patents control; an inductor of changes both in language and in structures of knowledge; and a promoter of a futurist and utopian thought of information technologies. Having in mind a revolution in communications promoted by the Internet, this paper revisits this seminal essay to explore its great attainment, as well as the problems of this kind of approach which conceives the innovation of the telegraph as a metaphor for all the innovations announcing the modern stage of history and determining still today the major lines of development in modern communication systems.

Mousetrapping: the ordeals of interpretation

Tese de doutoramento, Estudos Literários (Teoria da Literatura), Universidade de Lisboa, Faculdade de Letras, 2012

Laboratório de criação a partir de Macbeth de William Shakespeare: relatório de estágio

Relatório de Estágio submetido à Escola Superior de Teatro e Cinema para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Teatro - especialização em Encenação.