84 research outputs found
Intertextual strategies in African and Caribbean fiction: discourses of post-independence problem-space in Sylvia Wynter, George Lamming, Grace Odot, and Ngugi Wa Thiongo
No full text“Intertextual Strategies in African and Caribbean Fictions” is concerned with modes of narrative emplotment in post-independence writing in Africa and the Caribbean. In the two regions, anti-colonial narratives have been dominant for some time. These self-determination narratives construct what David Scott calls a “space of experience” where the present has triumphed over the oppression of the past and looks toward a “horizon of expectation” in the post-independence period. These Romance narratives, the work argues along with Scott, have lost their explanatory value. This is because questions that those in the post-liberation period ask have changed, and so the Romance narratives no longer provide answers. The dissertation pays close attention to primary texts and authors. The discussion also includes theoretical and critical texts from both Africa and the Caribbean. It uses Sylvia Wynter’s The Hills of Hebron (1962), George Lamming’s Water with Berries (1971), Grace Ogot’ The Strange Bride (1989), and Ngugi wa Thiongo’s Matigari (1987) to show that the Romance narrative mode of emploting the movement of history is inconsistent with the issues which concern post-independence problem-space. In its consideration of these works, it argues that the problem-space of anti-colonial nationalists should not be taken as a monument entrenched in stone that is designed by its creators to have a fixed meaning. Of course, the connection between anti-colonial nationalists and autonomy is vital; but the novels examined here show that the end of colonial rule also produced significant changes in the consideration of historical form and mode of narrative emplotment. The work argues that the transition from colonial rule to independence demands the emplotment mode of tragedy. It highlights the role of tragedy in historical change at the same time as it demonstrates that the novels discussed here call for a re-imagination in the post-independence problem-space.Ph. D.Includes bibliographical referencesby Enock Alo
Inclusions of von Neumann algebras and quantum groupoïds III
No full textAbstractIn a former article, in collaboration with Jean–Michel Vallin, we have constructed two “quantum groupoı¨ds” dual to each other, from a depth 2 inclusion of von Neumann algebras M0⊂M1, in such a way that the canonical Jones’tower associated to the inclusion can be described as a tower of successive crossed-products by these two structures. We are now investigating in greater details these structures in the presence of an appropriate modular theory on the basis M0′∩M1, and we show how these examples fit with Lesieur's “measured quantum groupoı¨ds”
Groupoïdes quantiques mesurés : axiomatique, étude, dualité, exemples
No full textRapporteurs : A. VAN DAELE, L. VAINERMAN Examinateurs : G. SKANDALIS, G. FERRANDIn this thesis, we propose a definition for measured quantum groupoid. The aim is the construction of objects with duality including both quantum groups and groupoids. We base ourselves on J. Kustermans and S. Vaes' works about locally compact quantum groups that we generalize thanks to formalism introduced by M. Enock and J.M. Vallin in the case of inclusion of von Neumann algebras. From a structure of Hopf-bimodule with left and right invariant operator-valued weights, we define a fondamental pseudo-multiplicative unitary. We introduce the notion of quasi-invariant weight on the basis and, then, we construct an antipode with polar decomposition, a coinvolution, a scaling group, a module and a scaling operator. The construction of the dual structure needs an extra condition which is satisfied in a lot of examples. We prove a biduality theorem when the basis is semifinite. This theory is illustrated with different examples.Cette thèse propose une définition des groupoïdes quantiques mesurés. L'objectif est la construction d'objets, munis d'une dualité, qui englobent à la fois les groupoïdes et les groupes quantiques. On s'appuie sur les travaux de J. Kustermans et S. Vaes concernant les groupes quantiques localement compacts qu'on généralise grâce au formalisme introduit par M. Enock et J.M. Vallin à propos des inclusions d'algèbres de von Neumann. A partir d'un bimodule de Hopf muni de poids opératoriels invariants à gauche et à droite, on définit un unitaire pseudo-multiplicatif fondamental. On introduit la notion de poids quasi-invariant sur la base et on construit une antipode avec décomposition polaire, une coinvolution, un groupe d'échelle, un module et un opérateur d'échelle. La construction du dual nécessite une hypothèse supplémentaire de densité vérifiée dans de nombreux cas. On obtient un théorème de bidualité dans le cas où la base est semifinie. Cette théorie est illustrée par différents exemples
Groupoïdes quantiques mesurés (axiomatique, étude, dualité, exemples)
No full textCette thèse propose une définition des groupoïdes quantiques mesurés. L'objectif est la construction d'objets, munis d'une dualité, qui englobent à la fois les groupoïdes et les groupes quantiques. On s'appuie sur les travaux de J. Kustermans et S. Vaes concernant les groupes quantiques localement compacts qu'on généralise grâce au formalisme introduit par M. Enock et J.M. Vallin à propos des inclusions d'algèbres de von Neumann. \{A} partir d'un bimodule de Hopf muni de poids opératoriels invariants à gauche et à droite, on définit un unitaire pseudo-multiplicatif fondamental. On introduit la notion de poids quasi-invariant sur la base et on construit une antipode avec décomposition polaire, une coinvolution, un groupe d'échelle, un module et un opérateur d'échelle. La construction du dual nécessite une hypothèse supplémentaire de densité vérifiée dans de nombreux cas. On obtient un théorème de bidualité dans le cas où la base est semifinie. Cette théorie est illustrée par différents exemples.ORLEANS-BU Sciences (452342104) / SudocSudocFranceF
Groupoïdes quantiques mesurés : axiomatique, étude, dualité, exemples
No full textRapporteurs : A. VAN DAELE, L. VAINERMAN Examinateurs : G. SKANDALIS, G. FERRANDIn this thesis, we propose a definition for measured quantum groupoid. The aim is the construction of objects with duality including both quantum groups and groupoids. We base ourselves on J. Kustermans and S. Vaes' works about locally compact quantum groups that we generalize thanks to formalism introduced by M. Enock and J.M. Vallin in the case of inclusion of von Neumann algebras. From a structure of Hopf-bimodule with left and right invariant operator-valued weights, we define a fondamental pseudo-multiplicative unitary. We introduce the notion of quasi-invariant weight on the basis and, then, we construct an antipode with polar decomposition, a coinvolution, a scaling group, a module and a scaling operator. The construction of the dual structure needs an extra condition which is satisfied in a lot of examples. We prove a biduality theorem when the basis is semifinite. This theory is illustrated with different examples.Cette thèse propose une définition des groupoïdes quantiques mesurés. L'objectif est la construction d'objets, munis d'une dualité, qui englobent à la fois les groupoïdes et les groupes quantiques. On s'appuie sur les travaux de J. Kustermans et S. Vaes concernant les groupes quantiques localement compacts qu'on généralise grâce au formalisme introduit par M. Enock et J.M. Vallin à propos des inclusions d'algèbres de von Neumann. A partir d'un bimodule de Hopf muni de poids opératoriels invariants à gauche et à droite, on définit un unitaire pseudo-multiplicatif fondamental. On introduit la notion de poids quasi-invariant sur la base et on construit une antipode avec décomposition polaire, une coinvolution, un groupe d'échelle, un module et un opérateur d'échelle. La construction du dual nécessite une hypothèse supplémentaire de densité vérifiée dans de nombreux cas. On obtient un théorème de bidualité dans le cas où la base est semifinie. Cette théorie est illustrée par différents exemples
Inclusions of Von Neumann Algebras and Quantum Groupoı̈ds II
No full textAbstractIn a previous article, in collaboration with Jean-Michel Vallin, we constructed two quantum groupoı̈ds, dual to each other, from a depth 2 inclusion of von Neumann algebras M0⊂M1. In this paper we investigate this structure in greater detail. In the previous article, we constructed the analog of a co-product, while in this paper we define a co-inverse, by making the polar decomposition of the analog of the antipode, and left and right invariant Haar operator-valued weights. These two structures of quantum groupoı̈ds, dual to each other, can be placed on the relative commutants M′0∩M2 and M′1∩M3 in such a way that the canonical Jones' tower associated to the inclusion can be described as a tower of successive crossed-products by these two structures
Outer actions of measured quantum groupoids
No full textAbstractMimicking a recent article of Stefaan Vaes, in which was proved that every locally compact quantum group can act outerly, we prove that we get the same result for measured quantum groupoids, with an appropriate definition of outer actions of measured quantum groupoids. This result is used to show that every measured quantum groupoid can be found from some depth 2 inclusion of von Neumann algebras
Interleaved EEC Coding for a Direct Sequence CDMA System in Land-Mobile Satellite Channel
No full textThe performance of forward error correction codes and the respective interleaved codes for a direct-sequence code division multiple access system in a bursty land-mobile satellite channel have been evaluated in terms of throughput and delay. The FEC scheme used the Reed-Solomon and BCH codes. Interleaved codes were compared with non-interleaved versions. Results are presented for heavy shadowing conditions in a fast as well as a slow fading environment. These results show only a modest improvement due to interleaving with very little effect on average delay.Applied SciencesElectrical EngineeringTelecommunications and Traffic Control Systems Grou
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