Cette thèse rend compte de travaux portant sur l’inférence de structures répétitives à partir du signal audio à l’aide d’algorithmes du texte. Son objectif principal est de proposer et d’évaluer des algorithmes d’inférence à partir d’une étude formelle des notions de similarité et de répétition musicale.Nous présentons d’abord une méthode permettant d’obtenir une représentation séquentielle à partir du signal audio. Nous introduisons des outils d’alignement permettant d’estimer la similarité entre de telles séquences musicales, et évaluons l’application de ces outils pour l’identification automatique de reprises. Nous adaptons alors une technique d’indexation de séquences biologiques permettant une estimation efficace de la similarité musicale au sein de bases de données conséquentes.Nous introduisons ensuite plusieurs répétitions musicales caractéristiques et employons les outils d’alignement pour identifier ces répétitions. Une première structure, la répétition d’un segment choisi, est analysée et évaluée dans le cadre dela reconstruction de données manquantes. Une deuxième structure, la répétition majeure, est définie, analysée et évaluée par rapport à un ensemble d’annotations d’experts, puis en tant qu’alternative d’indexation pour l’identification de reprises.Nous présentons enfin la problématique d’inférence de structures répétitives telle qu’elle est traitée dans la littérature, et proposons notre propre formalisation du problème. Nous exposons alors notre modélisation et proposons un algorithme permettant d’identifier une hiérarchie de répétitions. Nous montrons la pertinence de notre méthode à travers plusieurs exemples et en l’évaluant par rapport à l’état de l’art. / The work presented in this thesis deals with repetitive structure inference from audio signal using string matching techniques. It aims at proposing and evaluating inference algorithms from a formal study of notions of similarity and repetition in music.We first present a method for representing audio signals by symbolic strings. We introduce alignment tools enabling similarity estimation between such musical strings, and evaluate the application of these tools for automatic cover song identification. We further adapt a bioinformatics indexing technique to allow efficient assessments of music similarity in large-scale datasets. We then introduce several specific repetitive structures and use alignment tools to analyse these repetitions. A first structure, namely the repetition of a chosen segment, is retrieved and evaluated in the context of automatic assignment of missingaudio data. A second structure, namely the major repetition, is defined, retrieved and evaluated regarding expert annotations, and as an alternative indexing method for cover song identification.We finally present the problem of repetitive structure inference as addressed in literature, and propose our own problem statement. We further describe our model and propose an algorithm enabling the identification of a hierarchical music structure. We emphasize the relevance of our method through several examples and by comparing it to the state of the art.

Nesta tese, estudamos a integrabilidade quântica de modelos contínuos relevantes no contexto da quantização da supercorda do tipo IIB em AdS5 x S5, e, conseqüentemente, de interesse para a demonstração e uma melhor compreensão da correspondência AdS/CFT. Para os modelos de Landau-Lifshitz e de Alday-Arutyunov-Frolov, calculamos as amplitudes de espalhamento para três partículas e mostramos a fatorabilidade de suas matrizes S em primeira ordem não-trivial. Propomos também um novo método para a quantização de sistemas integráveis contínuos no exemplo do modelo de Landau-Lifshitz su(1;1). Nosso método fornece uma solução alternativa para o problema do ordenamento operatorial, bem como uma prescrição para a dedução das identidades de traço e do espectro das cargas quânticas conservadas. Ademais, mostramos que, por ser baseado em um processo de regularização e renormalização operatorial, concomitante à construção das extensões auto-adjuntas, a integrabilidade é preservada durante a quantização. / In this thesis, we study the quantum integrability of continuous models which arise from consistent truncations of type IIB superstring theory on AdS5 X S5, and, therefore are relevant for improving our current understanding of the AdS/CFT correspondence. For the Landau-Lifshitz and the Alday-Arutyunov-Frolov models, we compute the three-particle scattering amplitude and show the factorizability of the corresponding S matrices at the first non-trivial order. We also propose a new method for quantizing continuous integrable systems and apply it to the su(1;1) Landau-Lifshitz model. Our method provides an alternative solution to the longstanding operator ordering problem and gives a prescription to obtain the quantum trace identities, and the spectrum for the higher-order local charges. Moreover, since it is based on operator regularization and renormalization, as well as on the construction of the self-adjoint extensions, the integrability is preserved during the quantization process

Diese Dissertation behandelt automorphe Formen und ihre Fourierentwicklung im Rahmen der Typ IIB Stringtheorie. Besonderes Augenmerk wird auf den zehndimensionalen Fall gelegt sowie auf die torisch kompaktifizierte Theorie in sieben Raumzeitdimensionen mit jeweiligen Cremmer-Julia Symmetrien SL_2 und SL_5. Die Analyse erfolgt vorrangig über dem Adelenring mit dem Hauptergebnis einer Herleitung allgemeiner Ausdrücke für die Fourierentwicklung von Eisensteinreihen in der minimalen und nächstgrößeren (next-to-minimal) automorphen Darstellung beliebiger SL_n. / In this thesis, we study automorphic forms and their Fourier expansions in the context of type IIB string theory and its toroidal compactifications with an emphasis on the cases D = 10 and D = 7 where the Cremmer-Julia symmetry groups are SL_2 and SL_5 respectively. We work predominantly over the adeles and present general formulae for the Fourier expansions of Eisenstein series in the minimal- and next-to-minimal automorphic representations of SL_n.

Nesta tese foram estudadas configurações de cordas em movimentos de rotação e de oscilação no âmbito da correspondência AdS/CFT. Estas cordas movimentam-se nos espaços AdS5 × S5, de Lunin e Maldacena, R1, 9 e R1, 9 deformado. Para o caso da corda em rotação, determinou-se a existência do mágnon gigante e da corda farpada. Para o caso da corda oscilante, foram encontradas as soluções das equações de movimento clássicas e determinada a energia. Também calculamos explicitamente o número de supercargas preservadas para os espaços AdS5 × S5 e para R1, 9 deformado. / In this thesis we studied rotating and oscillating strings under the AdS/CFT correspondence. These strings move in the AdS5 × S5, Lunin and Maldacena, R1, 9 and deformed R1, 9 spaces. In the case of the rotating string, the giant magnon and the spiky string were determined. In the case of the oscillating string, we found the solutions fo the classical equations of motion and the energy. We also explicitly calculated the number of preserved supercharges for the AdS5 × S5and deformed R1, 9 spaces.

by Ho Tsz-Yan, Rebecca. / Thesis (M.Mus.)--Chinese University of Hong Kong, 1998. / Abstract also in Chinese. / Chapter Part I: --- p.page / Chapter ´Ø --- Abstract --- p.1 / Chapter Part II: / Chapter ´Ø --- "Analysis on ""Conversation""" --- p.3 / Chapter ´Ø --- """Conversation"" (Full Score)" --- p.6 / Chapter ´Ø --- "Analysis on ""Dark Haze´ح" --- p.25 / Chapter ´Ø --- """Dark Haze"" (Full Score)" --- p.28 / Chapter ´Ø --- "Analysis on ""San-Shui Xi-Nan""" --- p.65 / Chapter ´Ø --- """San -Shui Xi-Nan"" (Full Score)" --- p.69 / Chapter Part III： / Chapter ´Ø --- Biography --- p.119

Celestial Dreams is a three-movement work for chamber ensemble. This piece employs algorithmic processes (coded in BASIC and Pascal) that generate poetic text and convert it to musical pitches. The three movements contain coherent structures that allow for the complete integration of all ensemble members into the texture and for the flexibility to have one ensemble member emerge as the musical foreground. The chamber ensemble includes strings, tape, slides, and a narrator, who recites the poetic text which forms the foundation of the piece.

Made available in DSpace on 2016-04-27T19:30:27Z (GMT). No. of bitstreams: 1 Maria Isabel Medeiros Almeida.pdf: 2463783 bytes, checksum: 5d6b7db173fda71062ddeffeef40246e (MD5) Previous issue date: 2011-11-11 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / This presentation explains the process that made people in general forget about the Caldeirão, a peasant community, created in 1926 at Cariri, south of Ceara, and the facts that destroyed it, through the relationships between memory and history. For that, O Povo, O Estado and O Nordeste, newspapers from Ceara, will be analyzed, from 1935 to 1981. These newspapers had the same opinion about pollitics, economy and social issues, so, they had a very similar speech about the war in Caldeirao, that helped it to be forgotten. This research also brings back the memory of Caldeirao, after the ostracism, through some initiatives. The documentary O Caldeirão da Santa Cruz do Deserto, from the movie maker Rosemberg Cariry, and the string poetry about the community and its leader, José Lourenço, will be analyzed / O presente trabalho tem por compreender o processo que levou ao esquecimento da existência do Caldeirão, comunidade camponesa, fundada em 1926 na região do Cariri, ao sul do Ceará, e os fatos que envolveram sua destruição, a partir da relação entre memória e história. Para isso, serão analisadas as matérias dos jornais cearenses O Povo, O Estado e O Nordeste, entre 1935 a 1981. Por comungarem dos mesmos interesses políticos, econômicos e sociais, os três veículos construíram um discurso semelhante em relação ao combate do Caldeirão, que contribuiu para o seu esquecimento. Esta pesquisa também aborda o reencontro do Caldeirão, a partir da perspectiva de que, após o processo de esquecimento, surgiram iniciativas que trouxeram a comunidade de volta à memória. Para isso, será analisado o documentário O Caldeirão da Santa Cruz do Deserto, do cineasta cearense Rosemberg Cariry, e cordéis sobre a comunidade e o seu líder, José Lourenço

Made available in DSpace on 2015-07-15T13:31:36Z (GMT). No. of bitstreams: 1 Carlos Magno Capa.pdf: 502516 bytes, checksum: 80db11ec4bdef98ee9d16dfe6747e75c (MD5) Previous issue date: 2008-08-22 / This research have of principal theme the study of the comic-picaresque cycle in the cordel literature (string literature), based in the four leaflets that narrate the achievements of Maria Besta Sabida, of the cordel poet rooted in Feira de Santana, Ant?nio Alves da Silva, discussed under the interdisciplinary approach, involving literary theory, the aesthetics of laughable and studies popular culture. The specific objective of this work of research is: a)chart to the biographical profile of Ant?nio Alves da Silva; b) analyze to the nature of popular comicality, especially taking into account its aesthetic formatively and its resources linguistic-literary expression and c) exam to the specifically picaresque women, with cronotopo particularly adapted to the northeastern Brazilian reality. The position taken in this dissertation, in that respect, took the view that Maria Besta Sabida is a legitimate Brazilian picaresque, in a line of continuity of the Iberian matrix picaresque, of the centuries XVI and XVII. As appendix, will be presented a (new) of all works of AAS, catalogued the second thematic classification of Ariano Suassuna. / Esta pesquisa tem como tema principal o estudo do ciclo c?mico-picaresco na Literatura de Cordel, tomando-se como base os quatro folhetos que narram as proezas de Maria Besta Sabida, do cordelista radicado em Feira de Santana, Ant?nio Alves da Silva, analisado sob o enfoque interdisciplinar, envolvendo a teoria liter?ria, a est?tica do ris?vel e os estudos da cultura popular. O objetivo espec?fico deste trabalho de pesquisa ?: a) tra?ar o perfil biogr?fico de Ant?nio Alves da Silva; b) analisar a natureza da comicidade popular, sobretudo levando?se em conta sua formatividade est?tica e seus recursos de express?o ling??stico-liter?rios e c) examinar a especificidade da picaresca feminina e seu cronotopo particularmente afeito ? realidade nordestina brasileira. A posi??o tomada, nesta disserta??o, a esse respeito, assume o ponto de vista de que Maria Besta Sabida ? uma leg?tima p?cara brasileira, numa linha de continuidade da picaresca matricial ib?rica, dos s?culos XVI e XVII. Como ap?ndice, apresenta-se uma rela??o (in?dita) de todas as obras de AAS, catalogadas segundo classifica??o tem?tica de Ariano Suassuna.

Les corrections d’ordre supérieur en dérivées applicables à la théorie de supergravité à onze dimensions constituent un puissant outil pour étudier la structure miscroscopique de la théorie M. Plus partculièrement, l’invariant supersymétrique à l’ordre huit en en dérivées est nécessaire à la cohérence quantique de la théorie, mais il n’en existe à ce jour aucune expression complète. Dans cette thèse, après une introduction formelle aux théories de supergravité, nous présentons une technique appelée principe d’action (en superespace), dont le but est de générer le superinvariant complet associé au terme de Chern-Simons d’ordre huit. Bien que ce résultat ne soit pas encore atteint, nous en déterminons certaines caratérisiques, et ouvrons la voie à une résolution systématiques des étapes de calcul à venir. Dans le chapitre suivant, nous présentons les principales fonctionnalités du programme informatique crée pour gérer les imposants calculs liés au principe d’action. Ce programme est particulièrement adapté au traitement des matrices gamma, des tenseurs et des spineurs tels qu’ils surviennent en superespace. Enfin, à l’aide de ce programme, nous abordons un autre sujet calculatoire : la condensation fermionique en supergravité IIA massive. En utilisant la formulation en superespace des supergravités IIA, nous dérivons les termes de l’action quartiques en fermions, puis en imposant une valeur moyenne dans le vide non-nulle, nous montrons qu’il est possible de construire une solution de géométrie de Sitter dans deux cas simples / High order derivative terms in eleven dimensional supergravity are a powerful tool to probe the microscopic structure of M-theory. In particular, the superinvariant at order eight in number of derivatives is required for quantum consistency, but has not been completely constructed to this day. In this thesis, after a formal introduction to supergravity, we focus on a technique called the actions principle, in superspace, with the aim of generating the full superinvariant associated to the Chern-Simons term at order eight. Although we do not construct the superinvariant, we determine some of its characteristics, and pave the way for a systematic treatment of the computations leading to the correction. Then we present the main features of the computer program we built for dealing with the computations encountered in the action principle. It is specifically designed to deal with gamma matrices, tensors and spinors as they appear in superspace. Finally, with the help of this program, we tackle another computationally intensive subject : the fermionic condensation in IIA massive superspace. We use the superspace formulations of IIA supergravitites to find the quartic fermion term of the action, and by imposing a non-vanishing vacuum expectation value for this term, we realize a de Sitter solution in two simple cases

We study a quantum mechanical $\sigma$-model whose target space is a hyperKähler cone. As shown by Singleton, [184], such a theory has superconformal invariance under the algebra $\mathfrak{osp}(4^*|4)$. One can formally define a superconformal index that counts the short representations of the algebra. When the hyperKähler cone has a projective symplectic resolution, we define a regularised superconformal index. The index is defined as the equivariant Hirzebruch index of the Dolbeault cohomology of the resolution, hereafter referred to as the index. In many cases, the index can be explicitly calculated via localisation theorems. By limiting to zero the fugacities in the index corresponding to an isometry, one forms the index of the submanifold of the target space invariant under that isometry. There is a limit of the fugacities that gives the Hilbert series of the target space, and often there is another limit of the parameters that produces the Poincaré polynomial for $\mathbb C^\times$-equivariant Borel-Moore homology of the space. A natural class of hyperKähler cones are Nakajima quiver varieties. We compute the index of the $A$-type quiver varieties by making use of the fact that they are submanifolds of instanton moduli space invariant under an isometry. Every Nakajima quiver variety arises as the Higgs branch of a three dimensional $\mathcal N =4$ quiver gauge theory, or equivalently the Coulomb branch of the mirror dual theory. We show the equivalence between the descriptions of the Hilbert series of a line bundle on the ADHM quiver variety via localisation, and via Hanany's monopole formula. Finally, we study the action of the Poisson algebra of the coordinate ring on the Hilbert series of line bundles. We restrict to the case of looking at the Coulomb branch of balanced $ADE$-type quivers in a certain infinite rank limit. In this limit, the Poisson algebra is a semiclassical limit of the Yangian of $ADE$-type. The space of global sections of the line bundle is a graded representation of the Poisson algebra. We find that, as a representation, it is a tensor product of the space of holomorphic functions with a finite dimensional representation. This finite dimensional representation is a tensor product of two irreducible representations of the Yangian, defined by the choice of line bundle. We find a striking duality between the characters of these finite dimensional representations and the generating function for Poincaré polynomials.