387,204 research outputs found

    Automorphisms and coverings of Klein surfaces

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    In this thesis the theory of automorphisms and coverings of compact Klein surfaces is discussed by considering a Klein surface as the orbit space of a non-Euclidean crystallographic group. In chapter 1 we set out some of the well-established theory concerning these ideas. In chapter 2 maximal automorphism groups of compact Klein surfaces without boundary are considered. We solve the problem of which groups PSL (2,q) act as maximal automorphism groups of non-orientable Klein surface without boundary. In chapter 3 we discuss cyclic groups acting as automorphism groups of compact Klein surfaces without boundary. It is shown that the maximum order for a cyclic group to be an automorphism group of a compact non-orientable Klein surface without boundary of genus g ?3 is 2g, if g is odd and 2 (g – 1) if g is even. Chapter 4 is the largest section of the thesis. It is concerned with coverings (possibly folded and ramified) of compact Klein surfaces, mainly Klein surfaces with boundary. All possible two-sheeted connected unramified covering surfaces of a Klein surface are classified and the orientability of a normal n-sheeted cover, for odd n, is determine

    The Level and Structure of Slave Prices on Cuban Plantations in the Mid-Nineteenth Century: Some Comparative Perspectives

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    Data of: Moreno Fraginals, M., Klein, H. S., Engerman, S. L. (2020). The Level and Structure of Slave Prices on Cuban Plantations in the Mid-Nineteenth Century: Some Comparative Perspectives. Revista de Historia Económica / Journal of Iberian and Latin American Economic History (Second Series), Virtual Special Issue, 25 p

    Universi paralleli : Yves Klein e Lucio Fontana

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    Il saggio è il contributo scientifico principale del catalogo della mostra curata dagli autori presso il Museo del Novecento di Milano. In esso si indaga — nella piena autonomia dei percorsi individuali — l’intreccio della vicenda creativa di due protagonisti assoluti del rinnovamento artistico del XX secolo, negli anni tra il 1957 e il 1962. Nel gennaio 1957 Yves Klein tiene la prima personale di monocromi blu alla Galleria Apollinaire di Milano (Proposte monocrome) con una presentazione di Pierre Restany. Nell’occasione, Lucio Fontana è tra i primi acquirenti di un monocromo dell’artista francese. Nei cinque anni successivi (fino alla morte di Klein) il percorso dei due si incrocia più volte tra Milano e Parigi. Tra gli episodi più significativi dei loro rapporti si possono ricordare i contatti di Klein con galleristi e amici di Fontana (oltre a Guido Le Noci e Dino Buzzati, Peppino Palazzoli, che già nel maggio 1957 presenta alla Galleria Blu le collezioni private di Fontana e Bruno Munari e che sarà il primo acquirente di una Zone de sensibilité picturale immateriélle di Klein); un progetto di collaborazione tra i due per la XII Triennale di Milano, nel 1960; il ruolo di Iris Clert che, oltre alle numerose mostre di Klein, presenta nel 1960 le Nature di Fontana nella sua galleria parigina; i numerosi viaggi in Italia di Klein e i soggiorni parigini di Fontana

    A fantasia em Melanie Klein e Lacan: diferenças e similaridades

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    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas. Programa de Pós-Graduação em Psicologia.Esta dissertação é um estudo bibliográfico a respeito das similaridades e diferenças do conceito de fantasia nas teorias de Melanie Klein e Jacques Lacan, com objetivo final de enfoque no que o autor francês avançou em relação à autora austríaca no que diz respeito a este conceito. Encontra-se dividido em quatro partes: a primeira é uma introdução que inclui a apresentação do trabalho; a contextualização dos dois autores que norteiam o estudo e uma introdução à temática das fantasias com base nas teorias de Sigmund Freud, pai da psicanálise, de Melanie Klein e de Jacques Lacan, uma vez que os dois últimos partiram do primeiro na construção de suas próprias teorias. A segunda é uma confrontação das teorizações kleiniana e lacaniana a respeito das fantasias, ressaltando diferenças e semelhanças entre ambas. A terceira é uma nova confrontação de ambas as teorizações, porém com um novo enfoque: defender a hipótese de que o autor francês, em sua teorização acerca das fantasias, foi além da autora austríaca, já que não deixou de considerar suas produções e ainda refletiu acerca de aspectos não aprofundados por Klein. A quarta e última contém uma reflexão final a respeito de tudo que foi abordado ao longo do trabalho, enfatizando, mais uma vez, o avanço lacaniano. Como material e método de trabalho, foram utilizadas para a produção da primeira parte obras de Sigmund Freud, o pai da psicanálise, bem como de seus seguidores, na função de comentadores, assim como também de Melanie Klein e de Jacques Lacan e de seus respectivos seguidores. Já para a produção da segunda, terceira e quarta partes foram utilizadas obras apenas das teorizações kleiniana e lacaniana (dos próprios autores e seus seguidores, na função de comentadores)

    Einzelhandel. Leid- oder Leitfunktion in Klein- und Mittelstädten?

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    S.207-232Die Städte stehen unter großem Veränderungsdruck. Neben dem Strukturwandel im Einzelhandel und polarisierender demographischer Entwicklung führt der zunehmende Einfluss des Online-Handels bei gleichzeitig verändertem Kundenverhalten zu einer angespannten Lage in vielen Innenstädten. Insbesondere für Klein- und Mittelstädte stellt sich die Frage, ob der stationäre Einzelhandel noch eine Leitfunktion oder nicht viel mehr eine Leid-Funktion für die Innenstädte darstellt? In diesem Beitrag soll diese Frage mit Hilfe aktueller Ergebnisse aus einer Kommunalbefragung und zwei Fallstudien aus brandenburgischen Mittelstädten nachgegangen werden. Die in diesem Beitrag präsentierten Ergebnisse sollen dabei helfen, die Wechselbeziehungen und die aktuelle Lage zwischen Einzelhandel und Innenstädten in Klein- und Mittelstädten angesichts zunehmender Differenzierung besser einzuschätzen

    Uncovering quasi-degenerate Kaluza-Klein Electro-Weak gauge bosons with top asymmetries at the LHC

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    By exploiting the correlation between charge and spin polarisation asymmetries in t-tbar, we show that combining the two observables could identify the presence of quasi-degenerate states in a resonant signal at the LHC. As an example, we investigate experimental signatures emerging in top-antitop final states in the context of a model where the Standard Model Electro-Weak sector is allowed to propagate in large extra--dimensions of TeV-1 size while the colour sector is localised. Assuming current experimental constraints from the 7 and 8 TeV runs and taking into account the estimated top (anti-top) reconstruction efficiencies, we find that the 14 TeV upgraded LHC with the planned integrated luminosity L=100 fb-1 could access these quasi-degenerate multiple resonances and explore for the first time the rich phenomenology in the asymmetry observables. The main outcome would be having measurable quantities, complementary to the usual total and differential cross sections, capable of distinguishing a quasi-degenerate multiply resonant spectrum from a 'standard' single resonance that could present a similar signal in a bump hunt analysis

    The role of imagination in Bergman, Klein and Sartre

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    This thesis was submitted for the degree of Doctor of Philosophy and was awarded by Brunel UniversityThis thesis provides an inter-disciplinary study of selected works by Ingmar Bergman. I explore how key concepts from Melanie Klein and Jean-Paul Sartre apply to the focus on characters in a state of heightened imagination; and the value placed on imagination in the construction of these films. This involves recognition of the way an active response from the viewer is encouraged. Klein, Sartre and Bergman also attend to contextual factors that challenge any notion of subjectivity as sovereign and the power of imagination is frequently placed in a social context. All three figures develop their ideas within specialised fields drawing on the influence of others. Chapter 2 shows how Klein’s ideas relate to the influence of Freud before exploring how her work can be applied to Bergman’s films through the example of Wild Strawberries. Chapter 3 concentrates on Sartre’s early work, The Imaginary and considers how this is significant in relation to some of Sartre’s better-known philosophical ideas developed during and after the Second World War. These ideas will lead to an exploration of The Seventh Seal. Chapters 4, 5, and 6 focus on three films from distinct parts of Bergman’s career: Summer with Monika, The Virgin Spring and Hour of the Wolf. In Chapter 4 this will be preceded by a brief over-view of three more films from the early part of Bergman’s career. These chapters explore how Kleinian and Sartrean ideas can be incorporated in close analysis, and alongside selected critical responses to the films. The analysis integrates key points from Klein and Sartre in a methodology specific to film studies. This will include analysis of cinematic elements such as camera work and lighting, and recognition of narrative structure and character developmen

    Die Freud-Klein-Kontroverse – London 1941- 45

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    Die in diesem Band versammelten Arbeiten sind aus dem Wunsch entstanden, klinisch bedeutsame Denkmodelle der psychoanalytischen Theorie zur Diskussion zu stellen. Sie stammen von einer Gruppe von Frankfurter Psychoanalytikern, die sich seit Jahren mit der klinischen Arbeit der Kleinianer auseinandergesetzt haben. Anlass waren die Erfahrungen aus schwierigen und unbefriedigend verlaufenden Analysen, die dazu drängten, neue Wege zu suchen. Die theoretischen Konzepte von Melanie Klein bis Wilfred R. Bion, die dabei hilfreich waren, sind hier ausführlich dargestellt. So bietet das Buch auch eine hervorragende Informationsquelle für die zentralen Begriffe und Denkansätze der gegenwärtigen kleinianischen Psychoanalyse. Die Beschäftigung mit der Freud-Klein-Kontroverse (King/Steiner 1991) - die vor nunmehr über fünfzig Jahren in London geführt, uns dank einer verbatim Mitschrift nahezu lückenlos überliefert wurde und nun als Buch mit ausführlichen Kommentaren der beiden Herausgeber vorliegt - hat einen aktuellen Bezug: die Zunahme des Interesses an Melanie Klein und den Schriften der heutigen Kleinianer. Dieses Interesse findet jetzt auch seinen Ausdruck in einer deutschen Ausgabe von Kleins Gesammelten Schriften (Klein 1995).unknownunknow

    Higher dimensional theories in physics, following the Kaluza model of unification

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    This thesis traces the origins and evolution of higher dimensional models in physics, with particular reference to the five-dimensional Kaluza-Klein unification. It includes the motivation needed, and the increasing status and significance of the multidimensional description of reality for the 1990's. The differing conceptualisations are analysed, from the mathematical, via Kasner's embedding dimensions and Schrodinger's waves, to the high status of Kaluza-Klein dimensions in physics today. This includes the use of models, and the metaphysical interpretations needed to translate the mathematics. The main area of original research is the unpublished manuscripts and letters of Theodor Kaiuza, some Einstein letters, further memoirs from his son Theodor Kaiuza Junior and from some of his original students. Unpublished material from Helsinki concerns the Finnish physicist Nordstrom, the real originator of the idea that 'forces' in 4-dimensional spacetime might arise from gravity in higher dimensions. The work of the Swedish physicist Oskar Klein and the reactions of de Broglie and Einstein initiated the Kaluza-Klein connection which is traced through fifty years of neglect to its re-entry into mainstream physics. The cosmological significance and conceptualisation through analogue models is charted by personal correspondence with key scientists across a range of theoretical physics, involving the use of aesthetic criteria where there is no direct physical verification. Qualitative models implicitly indicating multidimensions are identified in the paradoxes and enigmas of existing physics, in Quantum Mechanics and the singularities in General Relativity. The Kaluza-Klein philosophy brings this wide range of models together in the late 1980's via supergravity, superstrings and supermanifolds. This new multidimensional paradigm wave is seen to produce a coherent and consistent metaphysics, a new perspective on reality. It may also have immense potential significance for philosophy and theology. The thesis concludes with the reality question, "Are we a four-dimensional projection of a deeper reality of many, even infinite, dimensions?
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