The editor's proofschrift--Utrecht. / Cover title. Extra t.p. with thesis note (in Dutch) inserted. Title also in Sanskrit. "Stellingen": 1 fold. L laid in.

The editor's proofschrift--Utrecht. / Cover title. Extra t.p. with thesis note (in Dutch) inserted. Title also in Sanskrit. "Stellingen": 1 fold. L laid in.

Thesis--University of London. / Bibliography: p. [165-183].

Pī-eca. Ḍī--Vārāṇasī--Kāśī Hindū viśvavidyālaya. / Bibliogr. p. 180-186.

Thesis (Ph. D.)--Michigan State University. Dept. of Astronomy and Astrophysics, 2008. / Title from PDF t.p. (viewed on July 23, 2009) Includes bibliographical references (p. 238-251). Also issued in print.

Mohandas Karamchand Gandhi contributed both to the Indian civil rights movement in South Africa and India's hind-swaraj (Indian home-rule) movement as a charismatic leader and spiritual warrior. In both cases Gandhi employed satyagraha, often translated as ‘soul force', as his community organizing and mobilizing strategy against the British Empire. Used to great effect this non-violent method of protest accomplished tangible victories in both movements. However, the success enjoyed by Gandhi's social movements varied wildly. In South Africa, Gandhi mobilized Indians against local legislative measures designed to strip them of their voting rights. Throughout this period Gandhi underwent a significant ideological shift, from Aryan supremacist, to humanitarian spiritualist. His appeal spread throughout the Indian world, and soon even English were contributing to his movement. Yet, victories never amounted to the democratization of the colony, let alone equal rights for Indian laborers. In India1 wee see Gandhi’s mobilization of Indians in the name of hind-swaraj lead to the withdrawal of British power from the nation. However, I speculate that this success had as much to do with Indian nationalist Subhas Chandra Bose, as it did Mohandas Gandhi. Bose and Gandhi each led hind-swaraj movements that conflicted deeply on an ideological and strategic basis. While Gandhi focused on the power of nonviolent civil disobedience within a state, Bose focused on diplomacy with Britain's enemies and the use of international pressures. The cumulative pressure of both movements during the British Empire's weakest moment. WWII, resulted in hind-swaraj.

Il existe plusieurs filtrations intéressantes définies sur la sous-algèbre de Cartan d'une algèbre de Lie simple complexe issues de contextes très variés : l'une est la filtration principale qui provient du dual de Langlands, une autre provient de l'algèbre de Clifford associée à une forme bilinéaire invariante non-dégénérée, une autre encore provient de l'algèbre symétrique et la projection de Chevalley, deux autres enfin proviennent de l'algèbre enveloppante et des projections de Harish-Chandra. Il est connu que toutes ces filtrations coïncident. Ceci résulte des travaux de Rohr, Joseph et Alekseev-Moreau. La relation remarquable entre les filtrations principale et de Clifford fut essentiellement conjecturée par Kostant. L'objectif de ce mémoire de thèse est de proposer une nouvelle démonstration de l'égalité entre les filtrations symétrique et enveloppante pour une algèbre de Lie simple de type A ou C. Conjointement au résultat et Rohr et le théorème d'Alekseev-Moreau, ceci fournit une nouvelle démonstration de la conjecture de Kostant, c'est-à-dire une nouvelle démonstration du théorème de Joseph. Notre démonstration est très différentes de la sienne. Le point clé est d'utiliser une description explicite des invariants via la représentation standard, ce qui est possible en types A et C. Nous décrivons alors les images de leurs différentielles en termes d'objects combinatoires, appelés des chemins pondérés, dans le graphe cristallin de la représentation standard. Les démonstrations pour les types A et C sont assez similaires, mais ne nouveaux phénomènes apparaissent en type C, ce qui rend la démonstration nettement plus délicate dans ce cas. / There are several interesting filtrations on the Cartan subalgebra of a complex simple Lie algebra coming from very different contexts: one is the principal filtration coming from the Langlands dual, one is coming from the Clifford algebra associated with a non-degenerate invariant bilinear form, one is coming from the symmetric algebra and the Chevalley projection, and two other ones are coming from the enveloping algebra and Harish-Chandra projections. It is known that all these filtrations coincide. This results from a combination of works of several authors (Rohr, Joseph, Alekseev-Moreau). The remarkable connection between the principal filtration and the Clifford filtration was essentially conjectured by Kostant. The purpose of this thesis is to establish a new correspondence between the enveloping filtration and the symmetric filtration for a simple Lie algebra of type A or C. Together with Rohr's result and Alekseev-Moreau theorem, this provides another proof of Kostant's conjecture for these types, that is, a new proof of Joseph's theorem. Our proof is very different from his approach. The starting point is to use an explicit description of invariants via the standard representation which is possible in types A and C. Then we describe the images of their differentials by the generalised Chevalley and Harish-Chandra projections in term of combinatorial objects, called weighted paths, in the crystal graph of the standard representation. The proofs for types A and C are quite similar, but there are new phenomenons in type C which makes the proof much more tricky in this case.

On étudie la correspondance de Howe entre la catégorie de représentations complexes de G et celle de G’, pour des paires duales irréductibles (G,G’) définis sur des corps finis de caractéristique impaire. On établit la compatibilité entre la correspondance de Howe et les séries arbitraires de Harish-Chandra. On démontre comment obtenir des sous-représentations extrémales (i.e. minimales et maximales) de l’image d’une représentation irréductible unipotente de G. Finalement, on démontre comment l’étude de la correspondance de Howe entre séries d’Harish-Chandra arbitraires peut être ramenée à l’étude des séries unipotentes, et on utilise ceci pour étendre nos résultats sur les représentations extrémales aux représentations irréductibles arbitraires (i.e. pas forcément unipotentes) de G. / We study the Howe correspondence between the category of complex representations of G and that of G’, for irreducible dual pairs (G,G’) over finite fields of odd characteristic. We establish the compatibility between the Howe correspondence and arbitrary Harish-Chandra series. We define and prove the existence of extremal (i.e. minimal and maximal) irreducible sub-representations from the image of irreducible unipotent representations of G. Finally, we prove how the study of the Howe correspondence between arbitrary Harish-Chandra series can be brought to the study of unipotent series, and use this to extend our results on extremal representations to arbitrary (i.e. not necessarily unipotent) irreducible representations of G.

Sripada and Konrath (forthcoming) use Structural Equation Modeling techniques to provide empirical evidence for the claim that implicit and automatic inferences about people’s dispositions, and not normative judgments, are the driving cause behind the pattern of folk judgments of intentional action in Knobe’s (2003a) chairman case. However, I will argue that their evidence is not as strong as they claim due to the potential of methodological and statistical problems with the way they tested their model. After correcting for these problems, I show that even after accounting for the role of dispositional inferences, normative judgments are still playing a significant role in folk judgments of intentional action.

Pulsar wind nebulae (PWNe), nebulae harbouring a rotation-powered neutron star that was born in a supernova, provide opportunities to study highly relativistic pulsar winds and their interaction with the surrounding medium. Particularly interesting are PWNe that do not show any sign of the expected surrounding SNR shell and were thought to be born in subenergetic explosions or with unusual progenitors. The detection of a shell around one such PWN suggested that shells are indeed produced but may be faint due to unseen shocked ejecta, a low density environment, and/or a young age that has not yet allowed the shell to brighten and become visible. Here, by using observational X-ray data from modern telescopes with excellent spatial and energy resolution (Chandra and XMM-Newton), we target PWNe that do not have prominent SNR shells, and are known to be in varied environments, to further explore the characteristics of this growing, but poorly explored, class of PWNe. By combining imaging and spectroscopic results, we study the morphology of the PWNe, search for thermal emission from shock-heated material, investigate the energetics of the nebulae, and search for candidates for the neutron stars powering the nebulae. We find that while the faint shell surrounding G21.5–0.9 can be explained as a young PWN evolving in a low density medium, CTB 87 (G74.9+1.2) appears to be in an advanced stage of evolution, and G63.7+1.1 appears to be both in an advanced stage of evolution and in a dense environment. By performing spatially resolved spectroscopy, we have shown how the spectral characteristics vary across the PWNe, and note that more data will place better constraints on possible thermal emission in these remnants. The imaging portion of these studies has revealed intriguing large-scale morphologies for CTB 87 and G63.7+1.1, as well as a torus-jet structure in CTB 87 and neutron star candidates in both CTB 87 and G63.7+1.1. We conclude that both CTB 87 and G63.7+1.1 are likely interacting with the supernova remnant reverse shock, and CTB 87 may be additionally influenced by the motion of its neutron star.