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Gegas, Christos Ioannis. "C.P. Cavafy: (Homo)Erotics and (Re)Constructions." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1374156416.
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Jusdanis, Gregory. "The Poetics of Cavafy : textuality, eroticism, history /." Princeton : N.J. : Princeton university press, 1987. http://catalogue.bnf.fr/ark:/12148/cb34955514s.
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Ricks, David Bruce. "Homer and Greek poetry 1888 - 1940 : Cavafy, Sikelianos, Seferis." Thesis, King's College London (University of London), 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268791.
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Triantafyllou, Andreas. "Performing 'C.P. Cavafy' through the fragment : seven seminal music renditions." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/18021.
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Building upon C.P. Cavafy’s overall poetics with which the existing scholarship has dealt, this dissertation attempts to further define the Alexandrian poet’s art of making poetry by locating its ever-increasing global appeal in the notion of the “fragment” as a performance genre. The concept of the fragment repositions and redefines Cavafy’s poetry as a text that “does things” and as a result, it opens the gateway to performativity. Thus, through fragmentation Cavafy’s poems cease to be proper texts and are endowed with the potential of political acts. The interaction of poetry with music is indeed the key to understanding the fluidity of the Cavafean poetry and its subsequent undeniable appeal worldwide, which the interaction of poetry with music makes visible. Viewed as a sonorous envelope, a fantasy space, a psychotextual discourse or an activity based upon musico-textual mechanisms, music opens the way to being viewed as a socio-cultural site of subjectivity formation that ignores all kinds of boundaries, both temporal and spatial. This dissertation thus argues for a sui generis Cavafean poetics of fragmentation in both thematic and stylistic terms that allows for ample experimentation and freedom not only on the poet’s behalf, but also in terms of its reception. Moreover, this project further tests the validity of such an argument at the intersection of poetry and music when one fuses into another in the form of the art song. By scrutinizing how Cavafy’s poetry has been put into music by various composers by means of a variety of approaches, including music analysis (e.g., melodic, harmonic, textural, semiotic, music psychology), psychoanalysis, and cultural theory, it aims to shape a “map” of various musical receptions of such a highly fragmented oeuvre as the Cavafean. To this end, it focuses on several case studies of music renditions ranging from that of the composer Dimitri Mitropoulos during the days of High Modernism (publicly presented in 1927 in Athens, Greece) through Peter Schat’s For Lenny at 70 (for tenor and piano, 1988), Lou Harrison’s Scenes from Cavafy (a work composed for gamelan orchestra, 1992), Yannis Papaioannou’s The Funeral of Sarpedon (2000), Ned Rorem’s Another Sleep: Waiting for the Barbarians (2002) and John Tavener’s Tribute to Cavafy (first performed in 2005 at Birmingham, UK), to the contemporary composer Kostas Rekleitis’ Cavafy Cycle (2012). By entering the deep, almost invisible territories where one art fuses with another, this thesis aspires to contribute to a better understanding of such a complex poetry as the Cavafean one, by offering a fresh perspective and mode of investigation onto an overlooked dimension of Cavafy’s work. It thus ultimately calls for a renewed interest for further interdisciplinary explorations, not only in the reception of Cavafy in music, but also of Cavafy in more complex artistic settings and forms, especially, that of performance.
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Coavoux, Sophie. "Le développement de l'érotisme dans la poésie de Constantin Cavafy." Montpellier 3, 2008. http://www.theses.fr/2008MON30010.
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Cette thèse étudie le développement de l’érotisme dans la poésie de Constantin Cavafy. Plus qu’un simple thème, l’érotisme est en effet au cœur du processus démiurgique et constitue le fil rouge de l’œuvre : en d’autres termes, c’est pour et par l’érotisme que Cavafy accède à son art. À partir d’un corpus large ne se limitant pas aux seules pièces canoniques, cette enquête s’articule autour d’une logique diachronique et thématique complétée par une approche volontiers comparatiste envisageant l’érotisme cavafien dans le cadre de l’histoire littéraire grecque et européenne. Le découpage chronologique suivi répond au caractère tripartite de l’itinéraire du poète. Après un chapitre préliminaire consacré aux prémices et à l’émergence du thème de l’amour dans les compositions antérieures à 1891, une première partie, couvrant la période de formation du poète, s’attache d’abord à identifier les sources de l’érotisme. Cette étape initiale, qu’accompagne une esthétique du détour, conduit l’Alexandrin à une période de crise, « the great crisis of libidinousness », qui ne trouvera de résolution que dans la légitimation et la mise en œuvre littéraire de l’érotisme. Une troisième partie, « L’amour qui ose dire son nom », considère enfin la période de la maturité : l’érotisme libéré est érigé en système, indissociable désormais des notions de modernité et de transgressionThe dissertation examines the growth of eroticism in Constantin Cavafy’s poetry. Beyond its mere thematic expression, eroticism turns out to be the core of the demiurgic process and forms the mainstay of his writings: in other words, it is on behalf of eroticism and on account of it that Cavafy fleshes out his art. Grounded on a wide array of pieces that include the canonical poems, this inquiry hinges on a diachronic as well as a thematic examination to which are appended elements of comparative study looking into cavafian eroticism in the wider context of European and Greek literary history. The chronological approach complies with the threefold dimension in the growth of the poet’s mind. Following an introductory chapter devoted to the very beginnings and to the emergence of love as a theme in compositions prior to 1891, the first part of the study, dealing with the poet’s formative years, focuses primarily on uncovering the sources of eroticism. This opening period, marked by an aesthetics of avoidance, leads to a moment of crisis for the Alexandrine, “the great crisis of libidinousness”, which will be soothed through the legitimate use of eroticism and its literary elaboration. The third part of the study, “The love that dare speak its name”, deals with the mature writings: eroticism becomes a system, now necessarily linked to modernity and transgression
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Rekleitis, Konstantinos. "Portfolio of compositions." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/8303.
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Skordi, Ioanna. "The 'regiment of pleasure' : Cavafy and his homoerotic legacy in Greek writing." Thesis, King's College London (University of London), 2018. https://kclpure.kcl.ac.uk/portal/en/theses/the-regiment-of-pleasure(0058f819-5e43-47c2-8fa9-c25976bc9e6f).html.
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Cavafy has been the key inspiration of a line of younger – and very different – Greek writers who employ homoerotic modes. This thesis, covering the years 1905-2010, concentrates on some major examples (Sikelianos, Lapathiotes, Ritsos, Ioannou, Christianopoulos) chosen for their variety of responses to the homoerotic Cavafy. In aggregate these writers, along with Cavafy himself, can be considered a ‘regiment’: the ‘Regiment of Pleasure’, in Cavafy’s term. In presenting these writers in this fashion, I attempt to illuminate both the work of the successors and that of their influential precursor. In the three broad yet selective chapters that constitute the main body of my thesis, I seek to display the culture-specific elements of the Modern Greek contribution to homoerotic writing, as these can be extrapolated from a critical examination of the poetic legacy of Cavafy, within three themes: Chapter 1, ‘The Appropriation of Ancient Greek Eros’, delineates the ways in which modern Greek homoerotic writing exploits Greek Love in Plato (Symposium and Phaedrus) and the Palatine Anthology. Chapter 2, ‘Homoeroticism and the Notion of Sin’, approaches literary homoeroticism as associated with sinfulness and confession. Chapter 3, ‘The Favoured Class and Games of Class- Crossing’, examines literary homoeroticism as connected to class barriers. The writers listed above appear as appropriate in each chapter. Always in relation with the analysis of the discussed writings, I draw as appropriate on queer theory, theories about tradition and reception, and the writers’ historical and social context. My aim is to show that different aspects of Cavafy’s queer radicalism have been exploited by a diverse range of Greek successors whose work has not hitherto been fully discussed, either in itself or in relation to Cavafy. Seeing his successors as a cluster is something new, as it also is the interpretative discussion of both poetry and prose in this direction.
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PAPADAKIS, GEORGES. "Destin et anamnese. Essai de lecture de la poesie de constantin cavafy." Université Marc Bloch (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR20027.
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Dans quelle mesure la poesie peut avoir une pretention referentielle,c'est-a-dire une pretention a porter sur quelque chose d'extra-linguistique? quelle est la place du "reel" dans la structure narrative de la parole poetique eu egard a la tendance inherente a cette derniere a trenscender la "realite" du monde? comment peuton dire que la poesie a acces au monde et au "reel" malgre son deport fictionnel, et par la meme une reference qui permette au discours poetique d'operer une configuration langagiere de l'experience temporelle de l'homme? la reconnaissance de la fonction "referentielle" de la poesie, ainsi que le montre c. Cavafy, doit etre inseparable de celle de son apport createur. C'est par la creation de son mythos que la poesie, mettant initialement la realite a distance, engendre une histoire qui se veut une representation imitee et surelevee de la vie humaine. La mimesis, a l'exemple de la tragedie, enseigne a voir la vie humaine comme ce que le mythos exhibe; la mimesis constitue la dimension "denotative" du mythos; elle tient ensemble la priximite a la realite humaine et la distance fictionnelle. Grace a cette distance la mimesis, purifiant le reel de son accidentalite, est restitution de l'humain non seulement selon l'essentiel mais en plus grand et en plus noble. D'ou la difference entre poesie et historiographie: si la premiere depeint le reel selon son essentialite, la seconde, ainsi que le souligne aristote, reste dans le contingent et l'accidentel. Seule une humeur mythisee peut ouvrir et decouvrir le monde parce que c'est une humeur qui a atteint la sagesse profonde de l'humanite. Sagesse qui,dans le cas de la tragedie,est acquise par une plongee simulee du mythos dans la legende. Cavafy,quant a lui,simulant une plongee de son mythos dans l'histoire de la grece, elargit le champ temporel de son experience personnelle et entre dans le champ inter-subjectif de l'experience humaineTo what extent can poetry claim tobe referential,thatis,claim to something beyond language?how important is "reality"in the narrative structure of poetic discourse considering its inherent tendency to trenscend the "reality" of the world?how can one state thate poetry has an access to the world and to "reality"in spite of its fictional drift and,thus,a reference through which poetic discourse might,by the means of words, account for man's temporal experience? acknowledging the "referential" function of poetry-as shown by c. Cavafis-should only be seen in relation to its creative contribution. In creating its mythos,poetry,initially setting reality at a distance, engenders a history which is meant both to imitate and uplift human life. Mimesis,as tragedy,teaches one how to look upon human life as what mythos stages in tobe:mimesis is the "denotative" dimension of mythos;it comprehends closeness to human reality and fictional distance. Thanks to the batter,mimesis,which purifies reality by removing fortuitus elements,still gives an image of man in his essence dut a greater and nobler one. Hence the difference between poetry and historiography:whereas the former depicts reality in terms of its essentiality,the latter,as aristotle insists,remains within the contingent and the accidental. Only mythicized mood can uncooer and doscover the world because this mood has reached the deeper wisdom of mankind whicls wisdom,in tragedy, is abtained by mreans of simulated descent of mythos into legend. Likewise, cavafis,simulating a descent of his mythos into the history of greece,widens the temporal field of his personal experience and enters the inter-subjective field of human experience
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VILLON, VICTOR RIBEIRO. "CONSTANTIN CAVAFY ET LE MONDE GRÉCO-ROMAIN : DIALOGUES ENTRE L’HISTOIRE ET LA POÉSIE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=15431@1.
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOLe poète grec - membre de la communauté grecque d’Alexandrie, en Égypte – Constantin Cavafy, passionné d’histoire, puisa, une grande partie, des thèmes de son oeuvre dans le passé du monde gréco-romain. Le but de notre travail est comprendre les rapports entre les poèmes historiques de Cavafy et l’histoire ancienne ; ce qui nous entraine à réfléchir aux rapports entre l’histoire et la poésie, en tant que domaines de l’expérience humaine. Considérant que l’historiographie de l’Antiquité apercevait la nature humaine comme immutable, l’histoire serait un grand répertoire d’exemples de jadis. Grâce aux récits des expériences d’antan, on pourrait acquérir d’inestimables connaissances sur les passions, les faiblesses et les vicissitudes de la condition humaine. Or, Cavafy, imprégné de la lecture d’anciens textes grecs, renoua avec cette tradition historiographique, c’est-à-dire du ktema ou de l’historia magistra viae. En élevant certains épisodes du passé au statut de poème, Cavafy mit l’art de sa poésie au profit de l’histoire. L’oeuvre cavafienne universalise le particulier d’un événement historique, donc elle fait de l’histoire une source de connaissance et de sagesse. Le parcours de notre recherche est divisé en trois parties. Dans la première, nous essayerons de comprendre l’Antiquité dans l’oeuvre de Cavafy, par rapport à ce que nous dénommons de monde gréco-romain. Dans la deuxième partie, nous aborderons certains aspects de l’histoire du peuple grec moderne et de la colonie grecque d’Alexandrie, mettant en relief les possibles intersections entre Cavafy et son temps. Dans la troisième parte, nous nous occuperons plus spécifiquement des rapports entre l’histoire et la poésie chez Cavafy, à partir de l’analyse de certains poèmes.
O poeta grego – membro da comunidade grega de Alexandria, no Egito – Konstandinos Kavafis, apaixonado por História, retirou, uma grande parte, dos temas de sua obra do passado do mundo greco-romano. O objetivo de nosso trabalho é compreender as relações entre os poemas históricos de Kavafis e a História antiga; o que nos leva a refletir sobre as relações entre História e poesia, enquanto domínios da experiência humana. Considerando que a historiografia da Antiguidade percebia a natureza humana como imutável, a História seria, então, um grande repertório de exemplos de outrora. Por meio dos relatos das experiências pretéritas, poder-se-ia adquirir inestimáveis conhecimentos sobre as paixões, as fraquezas e as vicissitudes da condição humana. Ora, Kavafis, impregnado da leitura dos antigos textos gregos, reatou com essa antiga tradição historiográfica, ou seja, a do ktema ou da historia magistra vitae. Ao elevar alguns episódios do passado ao status de poema, Kavafis colocou a arte em benefício da História. A obra kavafiana universaliza o particular de um acontecimento histórico, logo, ela faz da História uma fonte de conhecimento e de sabedoria. O percurso de nossa pesquisa está dividido em três partes. Primeiramente, tentaremos compreender a Antiguidade na obra de Kavafis, em relação ao que denominamos de mundo greco-romano. Na segunda parte, abordaremos certos aspectos da história do povo grego moderno e da colônia grega de Alexandria, sublinhando as possíveis interseções entre Kavafis e seu tempo. Na terceira parte, nos ocuparemos, mais especificamente, das relações entre a História e a poesia em Kavafis, a partir da análise de alguns poemas.
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Haas, Diana. "Le probleme religieux dans l'oeuvre de cavafy. Les annees de formation (1882-1905)." Paris 4, 1987. http://www.theses.fr/1987PA040040.
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Il y a une abondance de textes de cavafy qui se rattachent, directement ou indirectement, au probleme religieux, et qui furent ecrits pendant les annees de formation du poete. Un premier groupe de ces textes reunit des poemes et des articles dans lesquels cavafy, fidele a l'enseignement historique de paparrigopoulos, assume le role d'apologiste de byzance, notamment face a ses detracteurs occidentaux: il s'agit d'un ensemble de titres classes sous la rubrique thematique "jours byzantins", d'un article sur les poetes byzantins, et du poeme "a l'eglise". Un deuxieme groupe est forme des poemes classes sous une autre rubrique thematique, "les debuts du christianisme", qui temoignent de l'interet que portait cavafy aux courants philosophiques et religieux de cette epoque historique et qui refletent en meme temps les preoccupations personnelles du poete dans ce domaine. A ce groupe appartient aussi un poeme qui nous interesse surtout pour le role qu'il joue dans le developpement de la poesie erotique cavafienne: "ionique". Les textes qui composent le troisieme groupe se placent principalement sous le signe de l'esoterisme litteraire et artistique de l'europe du xixe siecle declinant. Alors que la presence de paparrigopoulos se fait constamment ressentir dans les textes portant sur byzance, la figure qui domine ici est celle de baudelaire. Les liens de cavafy avec le mouvement esoterique europeen en general et avec le symbolisme en particulier sont attestes par ses nombreuses lectures dans ce domaine, et certains motifs et themes chers aux ecrivains et artistes symbolistes , les "correspondances", la question du progres, de la mort, et de l'au-dela, le duel entre la tentation et la magie, et l'antithese entre connais- sance et foi , se retrouvent dans plusieurs de ses ecrits en vers et en prose. Les frontieres entre ces trois categories sont mouvantes; cependant, du labyrinthe de themes se degage l'image assez nette de deux carrefours principaux: au premier, ou se rencontrent et parfois se confondent histoire et esthetique byzantines, nous voyons s'opposer paparrigopoulos et gibbon; au second, ou se rencontrent et parfois se confondent spiritualite et esthetique esoteriques, nous percevons un conflit entre gibbon et baudelaire. Nous pouvons juger du chemin parcouru par cavafy pendant ses annees de formation en determinant dans quelle mesure chacun des participants a cette lutte interne en sort vainqueur ou vaincuThere is an abundance of texts of cavafy associated either directly or indirectly with the religious question which were written during the poet's early years. A first group of such texts includes poems and articles in which cavafy, faithful to the historical teaching of paparrigopulos, assumes the role of apologist for byzantium, especially vis-a-vis its detractors in the west: a number of titles classed under the thematic heading "byzantine days", an article on the byzantine poets, and the poem "in church". A second group consists of poems classed under a different thematic heading, "the beginnings of christianity", poems which attest to the poet's interest in the philosophical and religious currents of this historical period and which at the same time reflect his personal preoccupations in this area. To this group also belongs a poem which interests us above all for its role in the development of cavafy's erotic poetry: "ionic". The texts which make up the third group derive from the literary and artistic "esoterism" of late nineteenth-century europe. While the presence of paparrigopoulos can be constantly felt in the texts pertaining to byzantium, the figure which dominates here is that of baudelaire. The ties between cavafy and the european "esoteric" movement in general and symbolism in particular are attested by his many readings in this area, and certain motifs and themes popular among symbolist writers and artists , the phenomenon of "corres- pondances", the question of progress, death, and the afterlife, the duel between temptation and magic, and the opposition between knowledge and faith , can be found in many of his writings in verse and in prose. The boundaries between these cate- gories are not fixed; however, out of the labyrinth of themes there emerges the rather clear image of two crossroads. At the first one, where byzantine history and esthetics meet and sometimes merge, we observe a confrontation between paparrigopoulos and gibbon; at the second, where "esoteric" spirituality and esthetics meet and sometimes merge, we sense a conflict between gibbon and baudelaire. We may judge the distance covered by cavafy during his early years by determinig to what degree each of the participants in this internal struggle comes out victor or vanquished
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Haas, Diana. "Le problème religieux dans l'oeuvre de Cavafy : les années de formation, 1882-1905 /." Paris : Presses de l'Université de Paris-Sorbonne, 1996. http://catalogue.bnf.fr/ark:/12148/cb36181732t.
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Haas, Diana. "Le Problème religieux dans l'oeuvre de Cavafy les années de formation, 1882-1905 /." Lille 3 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37605882z.
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Paleou, Matrona. "Literary criticism, poetry and ideological commitment : C.P. Cavafy and the Greek Left ( 1950-1974)." Thesis, University of Birmingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.529793.
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Klapaki, Nektaria. "Versions of modern literary epiphany in twentieth-century Greek poetry : Cavafy, Sikelianos, Seferis, Embirikos." Thesis, King's College London (University of London), 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429414.
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Jeffreys, Peter. "Hellenism and orientalism in the work of E.M. Forster and Constantine Cavafy, a parallel reading." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq41026.pdf.
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Dimirouli, Foteini. "Cavafy hero : literary appropriations and cultural projections of the poet in English and American literature." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:84ca6361-a26c-4269-82da-4deb4b0c4664.
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The present thesis examines the way E.M. Forster, Lawrence Durrell, W.H. Auden, Stephen Spender, Joseph Brodsky, and James Merrill appropriated C.P. Cavafy in writings that were disseminated and consumed amongst culturally dominant literary circles, and which eventually determined the Greek-Alexandrian poet’s international reputation. I aim to contribute a new perspective on Cavafy, by evading the text-based tradition of reception studies, and proposing an alternative method of discussing the production of Cavafy's canonical status. Inspired by Pierre Bourdieu's sociological theory, I view literary canonization as involving a variety of factors at play beyond creative achievement: in particular, relationships of 'authorial consecration' whereby writers create and circulate cultural capital through their power to legitimize other artists. The critical and fictional texts I analyse perform readings of Cavafy's poetry alongside imaginative portrayals of the poet's life and personality. I take this complementary relationship - between the image of the poet each author projects and their reading of his work - as a starting point to explore the broader ideas of aesthetics and authorial subjectivity that inform the renderings of Cavafy generated by prominent literary figures. Rather than passive recipients of influence, these figures are considered as active agents in the production of 'Cavafy narratives', appropriating the poet according to their own agendas, while also projecting onto him their own position within the cultural field. Eventually, Cavafy becomes a point of insight into the multiplicity of networks and practices involved in the production of cultural currency; in turn, the study of the construction of Cavafy's authorial identity sheds light on the cumulative processes that have defined the way the poet is read and perceived to the present day. This duality of perspective is essential to a study concerned with the cultural contexts framing the poet's steady rise to international fame throughout the 20th century.
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Tsoútsoura, María. "Cavafy-Baudelaire : thèmes, traductions et formes dans le prolongement de la poésie baudelairienne en Grèce au tournant du siècle (1873-1917)." Paris 3, 1990. http://www.theses.fr/1991PA030027.
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La traduction des "correspondances" de baudelaire par cavafy en 1891 ouvre une double perspective : 1celle de la fortune de baudelaire en grece a la fin du dixneuvieme siecle (la poesie baudelairienne a surtout influence les oeuvres d'emmanuel roidis, dimitrios paparrigopoulos et jean papadiamandopoulos) 2celle de l'influence profonde de baudelaire sur la poedie de cavafy aussi bien pendant les annees de formation de ce dernier que plus tard, dans sa poesie du vingtieme siecle. Cette analyse comparatiste met en lumiere de nouveaux problemes de traduction de la poesie de cavafy en francais et propose des solutions a quelques uns d'entre euxThe translation of the baudelairian "correspondances" by cavafy in 1891 proposes a double perspective : 1 - the fortune of baudelaire in greece at the end of the nine- teenth century (the baudelairian poetry had particularly had an influence on the works of emmanuel roidis, dimitrios paparrigo- poulos and jean papadiamandopoulos), 2- the deep influence of baudelaire on the poetry of cavafy during the years of formation and later in his poetry written in the twentieth century. This approaoch opens new horizons through the field of influences of the fin-de-siecle poets lin- ked to cavafy into french and proposes solutions to some of them
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Christias, Panagiotis. "Poésie et société : genèse et réception sociales du discours poétique néo-hellénique : le cas de la "génération de 1930" : Cavafy, Ritsos, Séféris, Elytis." Paris 5, 2004. http://www.theses.fr/2004PA05H010.
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Entre le savant et le politique, un troisième acteur se fraye un chemin dans les temps modernes, le poète. De la réponse romantique à la première penseée des Lumières jusqu'aux théories épistémologiques et sociales de Weber et de Simmel, le poète occupe une place de plus en plus importante mais pas toujours reconnaissable comme telle. En étudiant le discours poétique de la génération de 1930 en Grèce à travers l'interaction des forces intellectuelles, historiques, politiques et sociales dans le contexte de la Grèce moderne, nous mettons en perspective l'engagement politique et social du poète aussi bien que l'élaboration d'une science poétique de la réalité sociale qui ne diffère pas essentiellement de la science des formes de la socialisation de Simmel. Ce travail permet de reconsidérer l'oeuvre poétique et de l'envisager comme le troisième pilier, le pilier caché, de la pensée moderneBetween the sage and the politic, a third actor seeks his way out into the modern scene, the poet. Ever since the romantic answer to the first moment of modern thought to the epistemological and social theory of Weber and Simmel, the poet takes a place which gets more and more important although it isn't visible as such. By studying the poetical discourse of the generation of 1930 in Greece through the interaction of intellectual, social and political forces in modern Greece, we offer a perspective view of the political and social engagement of the poet and also of his elaboration of a poetic science of social reality which doesn't differ essentially from Simmel's science of the forms of socialization. This works proposes to reconsider the poetical work and hold it for what it really is, the third pillar, the hidden one, of modern thought
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Barlow, Thomas Michael. "Cavity quantum electrodynamics of fibre-cavity networks." Thesis, University of Leeds, 2015. http://etheses.whiterose.ac.uk/12646/.
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Quantum mechanics, despite its abstract and unintuitive nature, is increasingly used in real-life applications. This thesis explores the current status of cavity quantum electrodynamics and its role in applications of quantum optics to quantum technologies. Various approaches to the treatment of optical cavities are discussed, with particular focus on a treatment in terms of cavities as linear optical devices, with a nonlinearity introduced by an atom, molecule, quantum dot etc in the cavity. Open quantum systems such as optical cavities coupled to a free external radiation field can be described by a quantum master equation. This thesis develops a description of such a system in which the Hamiltonian describes the coherent evolution of light inside the cavity, and the damping term describes the leaking of light out of the cavity mirrors. The goal of this approach is to describe couple networks of optical cavities in which information is transferred across the network coherently.
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Brama, Elisabeth. "Ion trap cavity system for strongly coupled cavity-QED." Thesis, University of Sussex, 2013. http://sro.sussex.ac.uk/id/eprint/45218/.
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The combination of an ion trap with a high finesse optical cavity is an ideal system for the investigation of strong coupling cavity quantum electrodynamics, and allows the observation of a number of interesting quantum phenomena. To achieve the small mode volumes required without impairing the ion trapping small traps with a short ion electrode distance are needed. Two microscopic linear rf ion traps have been developed and built to accommodate experimental cavities of lengths of several 100 microns. The first trap design, the 'sandwich' trap, was successfully used to trap 40Ca+ - ions for several hours. It was characterised extensively including a measurement of the heating rates of the ions in the trap. Spectroscopy measurements of the cooling transition, as well as the two repumping transitions were carried out. The second trap design, the 'alumina' trap, also successfully trapped 40Ca+ - ions, and a full characterisation of this trap was made. The experimental cavity was installed at a preliminary cavity length distance of 3.7 mm. The cavity characteristics were examined. Finally the trapped ions were overlapped with the cavity mode by adjusting the trap minimum position along the trap axis via dc voltages and the vertical position of the cavity. To progress further a locking scheme for the cavity length as well as a single - photon detection setup are necessary. To achieve strong coupling a reduction of the cavity length will have to be made.
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Maunz, Peter L. W. "Cavity cooling and spectroscopy of a bound atom-cavity system." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974430366.
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Badr, N. M. "Vertical-cavity surface-emitting lasers : polarisation and external cavity effects." Thesis, University of Bath, 1995. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760674.
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Netterfield, Michael Phillip. "Hypersonic cavity flows." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47586.
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Arnautov, O. "Quasistatic cavity resonance." Thesis, Sumy State University, 2017. http://essuir.sumdu.edu.ua/handle/123456789/62487.
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Nowadays our life continuously connects various kinds of gadgets. Most of these devices work using an accumulator. But the reserve of energy in batteries is emptying very fast. We need to charge the battery over and over again for using gadgets to continue our work.
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Luckenbill, Katie M. "Cavalry in Xenophon." Wright State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1432044265.
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Oh, Joonyoung. "Numerical study of micro-scale damage evolution in time dependent fracture mechanics." Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1117645391.
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Thesis (Ph. D.)--Ohio State University, 2005.Title from first page of PDF file. Document formatted into pages; contains xvi, 147 p.; also includes graphics Includes bibliographical references (p. 143-147). Available online via OhioLINK's ETD Center
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Liston, Gregory John. "The Atomic Trampoline Cavity." Thesis, University of Auckland, 1996. http://hdl.handle.net/2292/1913.
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Using an intense evanescent light wave as the lower mirror, and the gravitational force as the upper mirror, a vertical cavity for storing atoms can be constructed. Transverse confinement is obtained by totally internally reflecting the light off a concave as opposed to a planar crystal surface, which results in any atom reflected by the evanescent potential at a position away from the central axis receiving an impulse towards it. After a cursory discussion of atom optics and atomic cavities, we outline the configuration of the atomic trampoline cavity described above, and present analysis of the motion of atoms within it. A discussion of the classical dynamics and quantum modes in the cavity is given, together with other complicating factors which act as loss mechanisms out of the cavity. Various aspects of obtaining experimental realizations and applications of the cavity are considered. A detailed study of the quantum dynamics of atoms in the three dimensional cavity reveals that the dispersion can be adequately described in the transverse directions using a simulation involving a classical distribution of point-like atoms, where the probability density of finding an atom at a particular position in the simulation corresponds to the probability density of the atomic wavefunction. The classical simulations, however, significantly underestimate the spreading in the vertical direction. By calculating the modes of the atomic trampoline cavity, both in and out of the evanescent potential, the proportion of each of the modes in the excited state, and hence the decay rate, or linewidth due to spontaneous emission can be calculated. We found that even when the effect of the evanescent potential was included, the modes obtained correspond to those calculated by Wallis, Dalibard and Cohen-Tiennoudji [Appl. Phys. B 54,407 (1992)], who treated the bottom potential as infinitely steep and not exponentially decaying. In contrast to an optical Fabry-Pérot cavity, the linewidth was found to be strongly dependent on energy. Various other cavity parameters (finesse and Q) which depend on the loss due to spontaneous emission were also calculated. Using a ring cavity rather than a laser traveling wave to provide the light that totally internally reflects off the internal surface of the dielectric crystal, we can accumulate the phase change due to the single atom bouncing into and out of the evanescent wave and altering the refractive index of the cavity. A measurement of the phase of this light will reveal information about the atom. We found that the measurement did not significantly alter the mean or standard deviation of the atomic energy distribution across the modes of the cavity, as to first order the phase change of the light in the cavity is independent of the energy of the atom. The significant change in the energy distribution was the introduction of oscillations, which occurred when the phase measured was significantly different from the expected mean. The reason for these oscillations is that the measurement implies the weighting of modes just entering or leaving the evanescent wave should be increased or decreased. Ways of bringing this currently infeasible experiment closer to being achievable using novel design mechanisms are also discussed.
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Reeves, Timothy Blayne. "Hybrid coaxial cavity dielectrometer." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0018/MQ47087.pdf.
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Perryman, L. J. "Cavity growth mechanism maps." Thesis, University of Surrey, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381676.
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COSTA, EDUARDO THIESEN MAGALHAES. "COUPLED-CAVITY FIBER-LASER." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=5003@1.
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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIORNeste trabalho, desenvolvemos um laser a fibra, monomodo e de cavidades acopladas, cujo meio de ganho é uma Fibra Dopada com Érbio. As duas cavidades, C1 e C2, foram feitas no mesmo pedaço de fibra dopada, com a mesma concentração de Érbio (Er) e mesmo índice de refração. A Fibra Dopada com Érbio usada era também dopada com Germânio (Ge), que aumenta a fotossensitividade da fibra. Portanto, foi possível escrever Redes de Bragg na mesma fibra para serem usadas como os espelhos da cavidade. A configuração do laser consiste em três Redes de Bragg, escritas no mesmo núcleo da fibra, centradas em 1532nm e separadas por 30cm. As reflectividades das Redes de Bragg eram de 95%, 80% e 60%. Com essa configuração simples de cavidades acopladas, conseguimos uma emissão laser estável e monomodo. Será apresentado também um estudo teórico para descrever o sistema.
In this work, we developed a single mode coupled cavity fiber laser, in which the gain medium is an Erbium Doped Fiber. The two cavities, C1 and C2, were made in the same piece of the doped fiber, with the same concentration of Erbium (Er) and the same refraction index. The Erbium Doped Fiber used was codoped with Germanium (Ge), which increases the photosensitivity of the fiber. Therefore, it was possible to write bragg Gratings in the same fiber to be used as the cavity mirrors. The laser configuration consists of three Bragg Gratings, written in the core of the fiber, centered in 1532 nm and separated by 30cm. Ther Bragg Grating reflectivities were 95%, 80% and 60%. With this simple configuration of coupled cavities, a stable, single mode laser emission was achieved. A theoretical study to describe the system will also be presented.
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JUNIOR, OSWALDO BAPTISTA HORACIO E. SILVA. "CAVITY-BACKED SLOT ANTENNAS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=6003@1.
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MARINHA DO BRASILOs sistemas que operam em banda larga necessitam de radiadores que atendam eletricamente a banda de freqüência utilizada. As antenas com características de independência da freqüência, em particular as antenas espirais, têm encontrando cada vez mais utilização nesses sistemas, seja em aplicações comercias ou militares. Esta dissertação tem por objetivo a análise de desempenho de antenas espirais do tipo fenda em cavidades, pela aplicação do método dos momentos. Serão consideradas cavidades com a face oposta à antena constituída por um condutor perfeito ou acoplada a uma estrutura de microondas com matriz de espalhamento conhecida. Essa estrutura de microondas, poderá simular, por exemplo, uma ou mais camadas de material absorvente.Um modelo numérico foi desenvolvido, e a partir dele foi elaborado um programa de computador, para determinar as características de radiação de antenas espirais em cavidade. São apresentados e comparados os resultados obtidos para três configurações de antenas espirais de Arquimedes do tipo fenda: sem cavidade, com cavidade condutora e com um material absorvente colocado sobre a face da cavidade oposta a abertura da antena.
Broad band systems need radiators to operate over the entire frequency band. Frequency independent antennas, in particular spiral antennas, are finding increasing application in such systems, for commercial or military purposes. This dissertation has for objective the analysis of performance of cavity-backed slot spiral antenna, by applying the moment method . For this study it will be taken into account cavities with the face opposing to the antenna consisting of a perfect conductor or connected to a structure of microwaves with known scattering matrix. This microwave structure will be able to simulate, for example, one or more layers of absorbing material. A numerical model was developed, and based on it, it was elaborated a computer program to determine the radiation characteristics of cavity-backed spiral antennas. The results surveyed for three configurations of slot Archimedean spiral antenna are presented and compared: without cavity, with conducting cavity, and with an absorbing material placed on the cavity opposite to the antenna.
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Martins, Luis. "Quantum dot-cavity systems." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/18277/.
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This thesis presents experiments carried out on a single InGaAs/GaAs quantum dot coupled with a photonic crystal cavity (H1). The single exciton qubit system is controlled by ultrafast optical pulses. Then, the resonance fluorescence (RF), which is proportional to the population of the quantum dot, is measured by a spectrometer. The two main results of the whole thesis are: i) measurement of the short exciton lifetime (22.7~ps); ii) achievement of full populated quantum dot through a few photons (on average approx. 2.5 photons). To measure such a short lifetime the Two Pulse Resonance Fluorescence technique was developed. This technique enables measurements with high time resolution. This required the development of the Differential Resonance Fluorescence technique. This technique is highly efficient in suppressing the laser scattered light, permitting measurements of the RF of the dot. These two main results are the consequence of cavity enhancement. A Purcell factor of 42 was measured. This is the largest Purcell factor reported so far for the weak coupling regime. This enhancement allows the recovery of the coherence of the QD, permitting the investigation of the quantum dot--cavity system as a near--ideal single photon source on--chip and on--demand. The cavity enhancement also affects the exciton--phonon interaction. The full monotonic phonon side band is here presented for first time. This quantum dot--cavity system also allows the control of the cavity scattered light from the quantum dot. This can be used as an ultrafast switcher.
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Silander, Isak. "Cavity enhanced optical sensing." Doctoral thesis, Umeå universitet, Institutionen för fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-110278.
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An optical cavity comprises a set of mirrors between which light can be reflected a number of times. The selectivity and stability of optical cavities make them extremely useful as frequency references or discriminators. With light coupled into the cavity, a sample placed inside a cavity will experience a significantly increased interaction length. Hence, they can be used also as amplifiers for sensing purposes. In the field of laser spectroscopy, some of the most sensitive techniques are therefore built upon optical cavities. In this work optical cavities are used to measure properties of gas samples, i.e. absorption, dispersion, and refractivity, with unprecedented precision. The most sensitive detection technique of all, Doppler-broadened noise-immune cavity enhanced optical heterodyne molecular spectrometry (Db NICE-OHMS), has in this work been developed to an ultra-sensitive spectroscopic technique with unprecedented detection sensitivity. By identifying limiting factors, realizing new experimental setups, and determining optimal detection conditions, the sensitivity of the technique has been improved several orders of magnitude, from 8 × 10-11 to 9 × 10-14 cm-1. The pressure interval in which NICE-OHMS can be applied has been extended by derivation and verification of dispersions equations for so-called Dicke narrowing and speed dependent broadening effects. The theoretical description of NICE-OHMS has been expanded through the development of a formalism that can be applied to the situations when the cavity absorption cannot be considered to be small, which has expanded the dynamic range of the technique. In order to enable analysis of a large number of molecules at their most sensitive transitions (mainly their fundamental CH vibrational transitions) NICE-OHMS instrumentation has also been developed for measurements in the mid-infrared (MIR) region. While it has been difficult to realize this in the past due to a lack of optical modulators in the MIR range, the system has been based on an optical parametric oscillator, which can be modulated in the near-infrared (NIR) range. As the index of refraction can be related to density, it is possible to retrieve gas density from measurements of the index of refraction. Two such instrumentations have been realized. The first one is based on a laser locked to a measurement cavity whose frequency is measured by compassion with an optical frequency comb. The second one is based on two lasers locked to a dual-cavity (i.e. one reference and one measurement cavity). By these methods changes in gas density down to 1 × 10-9 kg/m3 can be detected. All instrumentations presented in this work have pushed forward the limits of what previously has been considered measurable. The knowledge acquired will be of great use for future ultrasensitive cavity-based detection methods.
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Eckold, Matthew. "The rotating cavity laser." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/374674/.
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This thesis describes a new technique for mitigating the detrimental thermal phenomena that often limit the power scaling potential of solid state lasers. The unavoidable heating effect that arisesfrom the quantum defect leads to a degradation in beam quality, reduced efficiency and, eventually catastrophic failure. However, lasing processes occur on a faster time scale than those associated with heat flow through a typical laser gain medium. This is made use of whenever a laser is operated in a QCW mode, the laser is operated within an adiabatic window then turned off whilst the gain medium cools. This adds a constraint to the maximum duty cycle of the laser and thus reduces the average power output. Alternatively to separating the two processes in time they can be separated in space. The thermal process can be separated from lasing with the introduction of motion to the system. By passing a collinear pump beam and laser mode through a rotating periscope placed in front of a gain medium the lasing spot can be moved into cold material before heat is able to flow. We call this arrangement the Rotating Cavity Laser (RCL). Unlike previously demonstrated solid state lasers which make use of motion, the RCL keeps the gain medium stationary. This allows it to be heat sunk directly, simplifying the mechanical arrangement. Within this thesis the first results from an RCL are presented with theoretical predictions of the influence motion has both on the lasing and thermal properties of the system. Attention is paid to the regime where stimulated emission is negligible and the losses due to motion are therefore greatest. The analysis of this regime allowed the threshold under motion to be calculated and the approach was verified experimentally. The RCL architecture allowed 120 W of 1064 nm light to be generated from a single end pumped Nd:YAG ceramic slab. The presence of moving intracavity components was found to have consequences for the stability of the power output. When producing 72 W the output power varied with a standard deviation of 2.8%, importantly this variation was cyclic suggesting it would be straightforward to correct by modulating the pump source. Whilst excellent beam quality was found at low powers the M2 became poor as the pump power increased. At output powers less than 51 W the beam quality was found to be constant over a rotation period. It is postulated that the increase in M2 at high pump powers, as well as the increase in variation in beam quality over a rotation period, is partly due to the presence of a thermally induced wedge compromising the alignment of the resonator. A number of experiments are also presented that demonstrate the effectiveness of introducing motion as a method to reduce the thermal load within a laser gain medium. Losses due to stress induced birefringence were reduced from 8% for the stationary case to less than 0.5% by rotating the periscope. The aberrating nature of the thermal lens present in the RCL was also investigated by passing a 1064 nm probe beam through it. When the periscope was stationary the probe beam degraded from an M2 of 1.1 to 2.0 under 16.3 W of pump power. Introducing motion and pumping the slab with 180 W resulted in the M2 increasing to 1.4, clearly demonstrated the greater resilience a system with motion has to detrimental thermal effects.
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Speirs, Nathan B. "Water Entry Cavity Dynamics." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7243.
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When a sphere or a stream of water hits the surface of a pool of water and enters a crater or air cavity often forms. This topic has been studied, both formally and informally, for a long time. This dissertation investigates four areas of water impact that are still poorly understood using high-speed photography. First, it examines a stream of droplets impacting on a pool of water, similar to a faucet drizzling into a full bucket. For these types of impacts we predict the depth, diameter, velocity, and shape of the cavities that the droplet stream forms. Second, it examines what occurs when a sphere impacts a pool of soapy water, such as a bubble bath or kitchen sink. The minimum velocity for a cavity to form decreases when soap is present. If the water has bubbles on the surface, the sphere will always form a cavity. Third, it examines how different coatings on a sphere (car wax, etc.) affect whether the sphere forms a cavity, and it shows how the coating affect the shape of that cavity. Fourth, when objects impact a water surface they experience a large force, which many people have noticed when participating in cliff jumping, high diving, and belly flop competitions. We show that the force of impact can be reduced by 75% simply by allowing a mass of water to impact in front of the object.
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Fonseca, Lívia Araújo da. "Reação em cadeia da polimerase (PCR) de sangue periférico e esplênico para diagnóstico de babesiose equina." reponame:Repositório Institucional da UnB, 2012. http://repositorio.unb.br/handle/10482/10428.
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Dissertação (mestrado)—Universidade de Brasília, Faculdade de Agronomia e Medicina Veterinária, 2012.Submitted by Albânia Cézar de Melo (albania@bce.unb.br) on 2012-05-07T12:50:48Z No. of bitstreams: 1 2012_LiviaAraujoFonseca.pdf: 1171532 bytes, checksum: 90ca1ac57eaf172667e321a1abe3f7c7 (MD5)
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A babesiose equina é uma doença que tem como agentes etiológicos a Theileria equi e a Babesia caballi. Essa enfermidade causa perdas diretas e indiretas. Os animais acometidos apresentam apatia, anemia hemolítica, hemoglobinúria, perda de desempenho atlético e pode levar a morte. Essa afecção provoca perdas econômicas devido à diminuição da comercialização de animais soropositivos e a restrição do trânsito dos mesmos. Após a fase aguda da doença, o animal não apresenta mais sinais clínicos, entretanto em casos de imunossupressão e estresse pode haver a reagudização da doença. O objetivo deste trabalho foi o de comparar os resultados obtidos com o uso das técnicas de esfregaço de sangue periférico, de punção esplênica e da Reação em Cadeia da Polimerase (PCR) e de verificar uma metodologia simples e precisa para diagnóstico de babesioses em cavalos portadores subclínicos, submetidos ao esforço físico ou competições. Foram avaliados em um primeiro estudo quinze animais hígidos, sem sinais clínicos de babesiose, sem raça definida, com peso médio de 350 Kg, idade entre 6 a 13 anos, de ambos os sexos e com histórico de infestação por carrapatos. No esfregaço de sangue colhido da orelha, nenhum animal apresentou resultado positivo enquanto que na punção esplênica cinco animais foram positivos para a presença de Babesia caballi ou Theileria equi. O esfregaço da punção esplênica parece ser mais eficaz em detectar casos latentes de babesiose em equinos. No segundo estudo foi colhido o sangue do baço, da ponta de orelha e da veia jugular de quinze animais hígidos para a confecção de esfregaços sanguíneos e PCR. Foram utilizados para este experimento equinos, machos e fêmeas, de diversas raças com massa aproximada de 450 kg e idade entre oito a dezesseis anos provenientes de centros equestres. Todos os animais foram negativos no esfregaço de sangue periférico e apenas um foi positivo na punção esplênica. Os resultados da PCR do sangue periférico e esplênico apresentaram baixa concordância o que corrobora com a necessidade de se utilizar mais de uma técnica para diagnosticar animais subclínicos. ______________________________________________________________________________ ABSTRACT
Equine babesiosis is a disease that has as etiologic agents Theileria equi and Babesia caballi. This illness provokes direct and indirect losses. The sick animals show athletic performance fall, apathy, hemolytic anemia, hemoglobinuria and death. Babesioses causes fall of the commercialization of soropositives animals and restricted movement of those. After acute phase, the animal stops to show clinical signs, but in situations of immunosuppression and stress the disease returns to be acute. The objective of this work was to compare the efficacy of these two techniques and to search for a simple and more precise diagnostic method for subclinical babesiosis in horses submitted to physical effort or competitions. Then, splenic punction and periferic blood smear were compared. In a first study, fifteen healthy horses, without clinical signs of babesiosis, median weight 350 Kg, age between six to thirteen years, both genders and with an history of tick infestation were used. Five animals were positive for Babesia caballi or Theileria equi, in splenic punction and none in blood smear. Both methods were little invasive, safe and easy to do, but the splenic punction smear seems to be more efficace to detect cronic babesioses in horses. In a second study, equines, both genders, median weighting 400 to 450 kg, aged 8 to 16 years old and from equestrian centers were used in this experiment. All animals were negatives for the presence of the etiologic agent on blood smears from the peripheral blood, only one were positive on the spleen punction. The results of the PCR of the peripheral blood and the spleen blood had low concordance what support the necessity to use more than one technique to diagnose subclinical animals.
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Hjältén, Adrian. "Modeling the cavity dispersion in cavity-enhanced optical frequency comb Fourier transform spectroscopy." Thesis, Umeå universitet, Institutionen för fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-157146.
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Cavity enhanced optical frequency comb spectroscopy is a technique that allows for quick and sensitive measurements of molecular absorption spectra. Locking the comb lines of an optical frequency comb to the cavity modes of an enhancement cavity and then extracting the spectral information with a Fourier transform spectrometer grants easy access to wide segments of absorption spectra. One of the main obstacles complicating the analysis of the measurements is the inevitable dispersion occurring inside the cavity. In this project, absorption measurements of CO2 were performed using an existing and well established setup consisting of a near-infrared optical frequency comb locked to a Fabry- Pérot enhancement cavity using the Pound-Drever-Hall technique, and a Fourier transform spectrometer. The purpose was to improve theoretical models of the measured absorption spectra by creating and verifying a model for the cavity dispersion, stemming mostly from the cavity mirrors but also from the normal dispersion of the intracavity medium. Until now, the cavity dispersion has been treated as an unknown and was included as a fitting parameter together with the CO2 concentration when applying fits to the absorption measurements. The dispersion model was based on previously performed precise measurements of the positions of the cavity modes. The model was found to agree well with measurements. In addition, pre-calculating the dispersion drastically reduced computation time and seemed to improve the overall robustness of the fitting routine. A complicating factor was found to be small discrepancies between the locking frequencies as determined prior to the measurements and the values yielding optimum agreement with the model. These apparent shifts of the locking points were found to have a systematic dependence on the distance between the locking points. The exact cause of this was not determined but the results indicate that with the locking points separated by more than about 10nm the shifts are negligible.
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Hoehler, Jacob Daniel. "High Peak Power Cavity Dumped Two Micron Vertical External Cavity Surface Emitting Lasers." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1591737351537186.
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Eppinger, Marise. "Hemorragia pulmonar de esforço e o desempenho de equinos PSI (Equus caballus) em corridas de galope no Jockey Club do Parana." [s.n.], 1990. http://hdl.handle.net/1884/48945.
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Orientador: Ivan DecontoContem 2 fots. coladas
Dissertação (mestrado) - Universidade Federal do Paraná. Setor de Ciências Agrárias
Devido à freqüente associação da hemorragia pulmonar de esforço (HPE) com o mau desempenho em corridas, este estudo buscou uma associação da HPE com o desempenho dos animais através da colocação nas corridas. O desempenho foi avaliado somente pela classificação de chegada na corrida, com o grupo vencedor (1° e 2°) representando cavalos de bom desempenho e o grupo perdedor (3° e "n") os de mau desempenho. Usando um endoscópio de fibra óptica, com 170 cm de comprimento útil de trabalho, examinou-se um grupo de 121 cavalos puro-sangue-inglês até 60 minutos após a corrida para detectar sinais de HPE. Os exames endoscópicos avançaram até a bifurcação traqueal. Encontrou-se 76,9% dos animais com HPE. Entretanto, não houve casos de epistaxe. Os resultados foram avaliados para analisar a incidência de HPE relacionada à idade e ao sexo do animal, distância da corrida, colocação, e condição da pista. A pista (areia) tinha três variações: seca, úmida ou molhada. A incidência da HPE foi maior na pista seca (82,2%) do que na úmida (75,0%) ou na molhada (60,0%) .Sabe-se que em pistas de areia a velocidade do animal é maior na condição de pista seca quando comparada à molhada. De acordo com os achados supomos que com o aumento da velocidade no exercício encontrava-se maior incidência de HPE. Neste caso, poder-se-ia demonstrar uma relação da velocidade com a freqüência de HPE. Não se encontrou associação significativa do sexo nem tão pouco idade do animal, ou distância da corrida, com a freqüência de HPE. Foram colhidas amostras de secreção traqueobronquial por aspiração endoscópica para exame citológico no intuito de encontrar macrófagos com hemosiderina intracitoplasmática. Estas células estiveram presentes em 64,4% dos aspirados traqueobronquiais. Por outro lado, naqueles animais com sangue na traquéia (HPE) e macrófagos com hemosiderina (siderófagos) no aspirado, a freqüência encontrada foi 84,3%. Apesar da presença dos siderófagos significar uma hemorragia ocorrida recentemente, não se encontrou associação significativa dos casos positivos para siderófagos e a colocação na corrida. Também investigou-se uma associação entre a freqüência bem como a severidade da HPE e a colocação do animal na corrida. Observou-se tanto a freqüência quanto a severidade da HPE significativamente mais altas no grupo perdedor, indicando que animais de mau desempenho tiveram maior incidência de HPE (65,5%) do que os de bom desempenho (34,4%). Ademais, os graus de maior severidade (I e II) da hemorragia pulmonar de esforço ocorreram com maior freqüência (61.2%) do que os graus (III e IV) de maior severidade (15,7%)
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Mendoza, Jeffrey Michael. "Effects of cavity dimensions, boundary layer, and temperature on cavity noise generation and control." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/11959.
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McCall, Jeremiah B. "The Roman Cavalry : cavalry combat and elite reputation in the middle and late republic /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1399900090.
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Nance, William Stuart. "Patton's Iron Cavalry - The Impact of the Mechanized Cavalry on the U.S. Third Army." Thesis, University of North Texas, 2011. https://digital.library.unt.edu/ark:/67531/metadc68023/.
Full textAbstract:
The American military experience in the European Theater of Operations during the Second World War is one of the most heavily documented topics in modern historiography. However, within this plethora of scholarship, very little has been written on the contributions of the United States Cavalry to this era. The six mechanized cavalry groups assigned to the Third Army served in a variety of roles, conducting screens, counter-reconnaissance, as well as a number of other associated security missions for their parent corps and the Army. Although unheralded, these groups made substantial and war-altering impacts for the Third Army.
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Martini, Ullrich. "Cavity QED with many atoms." Diss., [S.l.] : [s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=963141449.
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Russell, Adrian Robert Civil & Environmental Engineering Faculty of Engineering UNSW. "Cavity expansion in unsaturated soils." Awarded by:University of New South Wales. School of Civil and Environmental Engineering, 2004. http://handle.unsw.edu.au/1959.4/22263.
Full textAbstract:
The problem of cavity expansion in unsaturated soils is investigated. A unified constitutive model for unsaturated soils is presented in a critical state framework using the concepts of effective stress and bounding surface plasticity theory. Consideration is given to the effects of suction and particle crushing in the definition of the critical state. A simple isotropic elastic rule is adopted. A loading surface and bounding surface of the same shape are defined using simple and versatile functions. A limiting isotropic compression line exists, towards which the stress trajectories of all isotropic compression load paths approach. A non-associated flow rule is assumed for all soil types. Isotropic hardening/softening occurs due to changes in plastic volumetric strains as well as suction for some unsaturated soils, enabling account of the phenomenon of volumetric collapse upon wetting. Results of isotropic compression tests, oedometric compression tests and drained and undrained triaxial compression tests performed on Kurnell (quartz) sand in saturated and unsaturated states and subjected to stresses sufficient to cause particle crushing are presented and used to calibrate the model. The model is also calibrated using results reported in the literature for triaxial tests performed on saturated and unsaturated speswhite kaolin and three load paths. For both soils the model leads to a much improved fit between simulation and experiment compared to that for models based on conventional plasticity theory. The model is implemented into a cavity expansion analysis using the similarity technique, extended for application to unsaturated soils. Cylindrical and spherical cavities are considered, as are drained and undrained conditions. Cavity expansion results for the bounding surface model and conventional plasticity models are compared for saturated conditions. Substantial differences highlight the importance of adopting a model that accurately describes stress-strain behaviour. Cavity expansion results for the bounding surface model and saturated and unsaturated conditions are also compared. Substantial differences, particularly in the limit pressure, highlight the major influence of suction and the importance of accounting for this when using cavity expansion theory to interpret results of the cone penetration and pressuremeter tests.
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Dietrich, Christof Peter. "Cavity effects in polygonal resonators." Doctoral thesis, Universitätsbibliothek Leipzig, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-104393.
Full textAbstract:
In der vorliegenden Arbeit werden ZnO-Mikronadeln bezüglich ihrer Anwendbarkeit als Mikroresonatoren
untersucht. Dabei stehen Kavitätsmoden im Fokus der Untersuchungen, die
sich nur senkrecht zur Nadelachse ausbreiten, sprich innerhalb der hexagonalen Nadelquerschnittsfläche.
Folglich wird der Einfluss der Gestalt der Querschnittsfläche auf Resonatoreigenschaften
wie Propagation, Form, Direktionalität und Qualität der Kavitätsmoden sowohl
theoretisch simuliert als auch experimentell nachgewiesen. Die dabei beobachteten hohen Qualitätsfaktoren
von Flüstergalerie-Moden ermöglichen es darüberhinaus, Wechselwirkungseffekte
zwischen Kavität und Mode zu beobachten.
Der erste Teil der Arbeit beschäftigt sich mit der regulären, polygonalen Resonatorform und
deren Einfluss auf die Dimensionalität von Kavitätsmoden sowie deren mögliche Wechselwirkung
mit dem elektronischen System des Resonators. Beispielhaft wird ein hexagonaler Resonator
zur Veranschaulichung gewählt, wie er durch ZnO-Mikronadeln gegeben ist, undmittels
Finite-Difference-Time-Domain (FDTD)-Simulationen sowie winkelaufgelöster Photolumineszenz
(PL)-Spektroskopie untersucht. Die aufgenommenen PL-Spektren können unter Zuhilfenahme
photonischer Dispersionskurven von ein- und zwei-dimensionalen Kavitätsmoden
reproduziert werden. Basierend auf diesen Ergebnissen wird der Einfluß der Resonatorecken
auf die Lichtauskopplung diskutiert und mittels winkelaufgelöster, anregungsabhängiger und
temperaturabhängier PL-Spektroskopie nachgewiesen.
Desweiteren wird auf die Wechselwirkung zwischen dem Resonator und den Kavitätsmoden
eingegangen, imSpeziellen auf die starke Kopplung zwischen Flüstergalerie-Moden und freien
Exzitonen imResonatormaterial. Bereits erschienende Publikationen zu diesemThema werden
präsentiert und kritisch hinterfragt. Dabei wird ein Leitfaden aufgestellt, der eine Evaluierung
möglicher Polaritonen-Phänomene ermöglicht. Um Wechselwirkungen dieser Art auch in den
hier untersuchtenMikronadeln nachzuweisen, werden Hochanregungs-PL-Messungen durchgeführt.
Dabei werden Messungen in der Mitte der Nadel sowie in der Nähe ihrer Ecken getätigt,
um spezielle Polaritonen-Propagationseffekte beobachten zu können.
Im zweiten Teil der Arbeit wird der Einfluß von irregulären und inhomogenen Resonatorformen
auf die Bildung von Flüstergalerie-Moden diskutiert. Dafür werden elongierte Teile der
Nadeln, die durch laterale Auswüchse entstehen, winkelaufgelöst bezüglich einer gerichteten
Auskopplung von Kavitätsmoden vermessen und verzerrte Mikronadeln, wie sie beim Biegen
entstehen, bezüglich der entstehenden Deformationseffekte und deren Einfluss auf die
Kavitätsmoden mittels hochaufgelöster Mikro-PL untersucht. Die experimentellen Ergebnisse
zu irregulären Resonatoren können durch FDTD-Simulationen bestätigt werden. Desweiteren
wurden Mikronadel- und Nanonadel-Quantengraben-Heterostrukturen hergestellt und deren
Lumineszenzeigenschaften diskutiert. Dabei wird speziell auf die Homogenität der Quantengrabenemission
eingegangen und Strategien zur Realisierung einer starken Kopplung zwischen
Flüstergalerie-Moden und Quantengraben-Exzitonen aufgestellt. Diese Strategien werden
experimentell umgesetzt und deren Ergebnisse anhand von Kathodolumineszenzmessungen
vorgestellt.
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Nyairo, Kennedy Obare. "The multichannel grating cavity laser." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240058.
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Gray, Jonathan William. "Resonant cavity light emitting diodes." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399518.
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Evans, Gary. "The British Cavalry 1920-1940." Thesis, University of Kent, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.594400.
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Harper, John. "Car Roof Rack Cavity Noise." Thesis, University of Canterbury. Mechanical Engineering, 2006. http://hdl.handle.net/10092/2242.
Full textAbstract:
The goal of the thesis was to change reduce the noise produced from a small cavity with grazing sub sonic flow, via alterations in geometry. Research was done into how noise was produced in cavities and existing research in the field. While most work had been done in super sonic flow, little had been done for small cavities at slow, automobile level speeds. Despite the small amount of work done, several features of geometry were noted as affecting the production of sound in cavities. Several of these were chosen to be tested. A modular test rig was designed to allow easy change between the various geometries being tested. It had a flat top surface (of which the cavity came off) to keep the experiment generic, while the bottom surface was a combination of two slopes to keep disturbance to the flow at a minimum and reduce the background noise. A new working section, contraction and anechoic termination were designed and produced to add onto the existing wind tunnel in the mechanical engineering wing at the University of Canterbury. The noise production from a cavity is dependent upon the interaction between the vortices travelling in a 'shear layer' over the cavity throat interact with the front and rear edge of the cavity throat. By minimising the impact to the vortices as they travel between cavity edges, significant noise attenuation can occur. The most successful strategies were lowering the rear edge relative to the front edge and putting ramps on the front and rear edges. To test the principle of superposition, these two strategies, along with an 'L' plate (the third best strategy) were put together to make a 'Super' cavity. the noise spectrum from this cavity was almost identical to the background noise. Removal of the 'L' plate improved sound attenuation even more. Work to do in the future includes testing more examples of each geometry modification, as time constraints minimised the variations on each modification tested. Additionally, the super cavity should be tested in a curved, aerofoil/roof rack extrusion, to see if it as effective in a curved environment as a flat one. All experimental work was done at 100km/h, to coincide with the open road speed limit in New Zealand. The tests should be redone at different speeds, so a more complete picture of the cavity noise can be produced.
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Sale, Terence Edward. "Vertical cavity surface emitting lasers." Thesis, University of Sheffield, 1993. http://etheses.whiterose.ac.uk/1825/.
Full textAbstract:
Vertical cavity surface emitting laser (VCSEL) structures have been grown by both metal-organic chemical vapour deposition (MOCVD) and molecular beam epitaxy (MBE). These incorporate 3 strained InGaAs / GaAs quantum wells placed resonantly in a two wavelength long optical cavity, formed between AlAs / GaAs quarter wave dielectric reflector stacks through which current is injected. The reflection spectra of these stacks is studied in detail; the effects on the laser threshold gain of absorption due to impurities and of errors in growth are investigated. Methods of disruption of the AlAs / GaAs heterointerfaces have been used to reduce the operating voltage. The completed designs use 200A intermediate layers containing 30 or 50% aluminium or a superlattice graded region simpler than that used in previous designs. The effectiveness acceptor dopants; Be in MBE, C and Zn in MOCVD; is studied also. Modulation doping was employed to reduce the effects of optical absorption. Devices were fabricated into mesas by SiC14 reactive ion etching or defined by proton implant isolation. MBE grown devices were resonant at wavelengths in the range 950 to 1059mn with essentially constant (at —1020nm) eihhi transition energies in the wells. A detailed study of the wavelength variation of threshold current density Jth (X)was made. A minimum of 366A.cnr2 was measured at 1018nm in mesa devices. A similar relation is found for ion-implanted devices but the minimum is increased to 535A.cm-2 by incomplete isolation. Gain calculations, including strain effects, are used to explain the Jth(X) variation. Implanted devices offer superior c.w. performance due to reduced thermal and ohmic resistances. The relative offset between the gain spectrum and cavity resonance was examined for c.w. operation. It was found that carrier thermal effects limit the output power rather than shifts in the offset. The bias voltage of MOCVD grown devices is as low as 1.7V and the threshold current is as low as 764A.cm-2. This is higher than for MBE grown devices because of growth thickness errors and non-optimal alignment of the gain spectrum and cavity mode. The uniformity in emission wavelength is ±1% over 80% of a 2 inch diameter wafer, offering suitability for very large uniform arrays.