85 research outputs found
The \u27Tragic Mulatta\u27 Revisited: Race and Nationalism in Nineteenth-Century Antislavery Fiction
No full textThis very sophisticated book is distinguished by taking the figure of the tragic mulatta seriously as an embodiment of central concerns about race and nation in the antebellum United States. -Michael Bennett, Long Island University, Brooklyn Since its inception, the United States has been intensely preoccupied with interracialism. The concept is embedded everywhere in our social and political fabric, including our sense of national identity. And yet, in both its quantitative and symbolic forms, interracialism remains an extremely elusive phenomenon, causing policy makers and census boards to wrangle over how to delineate it and, on an emblematic level, stirring intense emotions from fear to fascination. In The Tragic Mulatta Revisited, Eve Allegra Raimon focuses on the mixed-race female slave in literature, arguing that this figure became a symbolic vehicle for explorations of race and nation-both of which were in crisis in the mid-nineteenth century. At this time, judicial, statutory, social, and scientific debates about the meaning of racial difference (and intermixture) coincided with disputes over frontier expansion, which were never merely about land acquisition but also literally about the complexion of that frontier. Embodying both northern and southern ideologies, the amalgamated mulatta, the author argues, can be viewed as quintessentially American, a precursor to contemporary motifs of hybrid and mestizo identities. Where others have focused on the gendered and racially abject position of the tragic mulatta, Raimon reconsiders texts by such central antislavery writers as Lydia Maria Child, William Wells Brown, Harriet Beecher Stowe, and Harriet Wilson to suggest that the figure is more usefully examined as a way of understanding the volatile and shifting interface of race and national identity in the antebellum period. Eve Allegra Raimon is an associate professor of arts and humanities at the University of Southern Maine, Lewiston-Auburn College.https://digitalcommons.usm.maine.edu/facbooks/1111/thumbnail.jp
De l'écologie à l'écosophie : l'intuition de Raimon Panikkar
No full textThe environmental crisis has disrupted the lives and activities of man. The ecological movement has proposed solutions to the problems we face, but it always uses the same Logos that got us into these difficulties. Theology, however has focused on this question only recently. It answered to criticisms with a renewed theology of creation. Our author of interest, Raimon Panikkar, proposes to complement this approach with a new Trinitarian theology. What he called the “cosmotheandric intuition” establishes a constitutive close relationship between God, man and the cosmos. This intuition means paying special attention to wisdom. It is therefore urgent that ecology walks hand in hand with ecosophy. To this end, mankind ought to cultivates the virtues that will allow it to reconnect with the others dimensions of reality. This new approach has two fondamental corollaries : an ecosophical ethics and a ecosophical political theology, that we intend to develop in order to prolong on Panikkar’s thought.La crise environnementale a bouleversé la vie de l’homme et toutes ses activités. L’écologie a essayé de trouver des solutions aux problèmes qui nous assaillent, mais elle reste toujours dans le même logos qui nous a mis dans ces difficultés. La théologie, quant-à elle, s’est intéressée depuis peu de temps à cette question. Elle a répondu aux reproches qui lui ont été adressés avec une théologie renouvelée de la création. Notre auteur, Raimon Panikkar, propose de compléter cette approche avec une nouvelle théologie trinitaire. C’est ce qu’il a appelé l’« intuition cosmothéandrique » qui établit une relation étroite et constitutive entre Dieu, l’homme et le cosmos. Cette intuition implique de prêter une attention particulière à la sagesse. Il s’avère donc urgent que l’écologie chemine de pair avec l’écosophie. Dans ce but, il conviendrait que l’homme cultive les vertus qui lui permettront de retrouver son lien avec les autres dimensions de la réalité. Cette nouvelle approche a deux corollaires fondamentaux : une éthique et une théologie politique écosophiques, que nous nous proposons de développer pour prolonger la pensée de Panikkar
From ecology to ecosophy : the Raimon Panikkar’s intuition
No full textLa crise environnementale a bouleversé la vie de l’homme et toutes ses activités. L’écologie a essayé de trouver des solutions aux problèmes qui nous assaillent, mais elle reste toujours dans le même logos qui nous a mis dans ces difficultés. La théologie, quant-à elle, s’est intéressée depuis peu de temps à cette question. Elle a répondu aux reproches qui lui ont été adressés avec une théologie renouvelée de la création. Notre auteur, Raimon Panikkar, propose de compléter cette approche avec une nouvelle théologie trinitaire. C’est ce qu’il a appelé l’« intuition cosmothéandrique » qui établit une relation étroite et constitutive entre Dieu, l’homme et le cosmos. Cette intuition implique de prêter une attention particulière à la sagesse. Il s’avère donc urgent que l’écologie chemine de pair avec l’écosophie. Dans ce but, il conviendrait que l’homme cultive les vertus qui lui permettront de retrouver son lien avec les autres dimensions de la réalité. Cette nouvelle approche a deux corollaires fondamentaux : une éthique et une théologie politique écosophiques, que nous nous proposons de développer pour prolonger la pensée de Panikkar.The environmental crisis has disrupted the lives and activities of man. The ecological movement has proposed solutions to the problems we face, but it always uses the same Logos that got us into these difficulties. Theology, however has focused on this question only recently. It answered to criticisms with a renewed theology of creation. Our author of interest, Raimon Panikkar, proposes to complement this approach with a new Trinitarian theology. What he called the “cosmotheandric intuition” establishes a constitutive close relationship between God, man and the cosmos. This intuition means paying special attention to wisdom. It is therefore urgent that ecology walks hand in hand with ecosophy. To this end, mankind ought to cultivates the virtues that will allow it to reconnect with the others dimensions of reality. This new approach has two fondamental corollaries : an ecosophical ethics and a ecosophical political theology, that we intend to develop in order to prolong on Panikkar’s thought
Ecosofía: hacia una comprensión de la sabiduría de la tierra desde la noción de "ritmo del ser" de Raimon Pannikar
No full textEl presente artículo expone algunas ideas relevantes de la noción de ecosofía de Raimon Panikkar y con ello profundiza en la sabiduría del oikos. Se pretende destacar la originalidad del planteamiento ecosófico de Panikkar, cuyo pensamiento es fruto de un fecundo diálogo interculturalinterreligioso (hinduismo, cristianismo y budismo). Si bien el autor no desarrolló de forma sistemática la noción ecosofía, su ontología de madurez, expresada en la noción del ritmo del ser, nos puede aproximar a comprender de manera novedosa esta sabiduría que se manifiesta en un llegar a ser donde participan lo divino, lo humano y lo cósmico. Se expondrá que la noción de ecosofía nos asienta en la vida contemplativa y la sabiduría de la inter-in-dependenciaThis article presents important ideas in Raimon Panikkar's notion of ecosophy, thus entering more deeply into the wisdom of the oikos. The aim is to highlight the originality of our author's ecosophical proposal, fruit of a fertile intercultural and inter-religious dialogue (Hinduism, Christianity and Buddhism). Although the author did not develop systematically the notion of ecosophy, the ontology of his mature years, expressed in the notion of the rhythm of being, can bring us closer to a new understanding of this wisdom, manifested in a becoming in which the divine, the human and the cosmic each have a part. The article will show that Panikkar's notion of ecosophy sets us in the contemplative life and the wisdom of interindependenc
New Strategies for Black Hole Physics
No full textPrograma de Doctorat en FísicaIn this thesis we apply new approaches and develop new techniques to address various issues related to fundamental aspects of modern gravitational theory and black holes.
We study the behavior of black branes in the large D approximation, that is, we consider a space with a very large number of dimensions. This approach allows us to obtain a set of very simple equations that capture many of the physical phenomena of gravity. This technique uses the fact that the gravitational field around a massive object decays faster the higher the dimension, so when you take the very large D limit it becomes concentrated in a very thin region of size 1/D around the horizon of the black hole. In this way, the horizon can be viewed as a membrane suspended in an essentially flat background geometry. The region where the black hole lives is, in some sense, excluded from the background space.
We use the large D effective equations to investigate the phases and stability of black strings at different values of the dimension D and the compactification length L. In some cases, the Gregory-Laflamme instability of the uniform black strings can lead to stable non-uniform black strings. The transition type changes at a certain critical value of D ~ 13.5. We use 1/D corrections to estimate the value of the critical dimension, which turns out to be very accurate.
Possible violations of Weak Cosmic Censorship in black hole collisions at D > 4 are also explored. The large D technique, through the effective equations, provides a powerful tool for analyzing such scenarios that would otherwise be very difficult to tackle using numerical simulations at finite D. It has recently been shown that rotating black holes can be described as Gaussian lumps on a black brane.
The Strong Cosmic Censorship conjecture for highly charged Reissner-Nordström black holes has recently been called into question in asymptotically de Sitter spacetimes. To go beyond previous studies, this thesis includes the results of nearly extremal Reissner-Nordström nonlinear simulations. In order to perform the nonlinear (spherically symmetric) integrations, a new spectral code has been developed in double-null coordinates.
Any continuous system that can be described as a quantum field theory will react to a change in the geometry where it is located. It will do so by changing its distribution of energy density, pressure and stresses. That is, the system is polarized, and its stress-energy tensor acquires a non-trivial quantum expectation value. In this context, the holographic duality, also known as AdS/CFT correspondence, is extremely useful for extracting valuable qualitative information from the system. Perturbations of the geometry of the AdS boundary will produce tidal deformations in the geometry of the bulk. To calculate this deformations, we solve the equations for a linearized perturbation of the geometry that satisfies suitable boundary conditions.
Finally, we study a subset of Horndeski's theories whose equations of motion are locally well posed. However, it is necessary to determine whether global solutions exist and whether they are sufficiently well behaved. A worrisome possibility (which has been confirmed by numerical simulations) is a change in the character of the equation of motion, from hyperbolic to parabolic and finally to elliptical. This causes a change in the causal structure of the geometry.En aquesta tesi aplicarem nous enfocaments i desenvoluparem noves tècniques per tractar diversos temes relacionats amb aspectes fonamentals de la teoria gravitacional moderna i els forats negres.
Estudiem el comportament de les branes negres en l’aproximació large D, és a dir, considerem un espaitemps amb un nombre molt gran de dimensions. Aquest enfocament ens permet obtenir un conjunt d’equacions molt simples que recullen molts dels fenòmens físics de la gravetat. En alguns casos, la inestabilitat de Gregory-Laflamme de les cordes negres uniformes pot conduir a cordes negres no uniformes estables. S’exploren també possibles esdeveniments de violació de la Censura Còsmica Feble en col·lisions de forats negres a D > 4. La tècnica de large D, mitjançant les equacions efectives, proporciona una eina potent per analitzar aquest tipus d’escenaris que d’altra manera serien molt complicats d’abordar mitjançant simulacions numèriques a D finita.
Recentment s’ha posat en dubte la conjectura de Censura Còsmica Forta per a forats negres de Reissner-Nordström altament carregats en espaitemps asimptòticament de Sitter. Per anar més enllà dels estudis anteriors, en aquesta tesi s’inclouen els resultats de simulacions completament no lineals de Reissner-Nordström altament carregats.
Qualsevol sistema continu que es pugui descriure com una teoria quàntica de camps reaccionarà davant un canvi en la geometria on està situat. En aquest context, la correspondència AdS/CFT és extremadament útil per extreure informació qualitativa i valuosa del sistema. Les pertorbacions en la geometria de la frontera d’AdS produiran deformacions de marea en la geometria de l’interior. Per calcular aquesta deformació, resolem les equacions per a una pertorbació linealitzada de la geometria que satisfà una condició de contorn adequada a l’infinit.
Finalment, s’estudia un subconjunt de les teories de Horndeski les equacions del moviment de les quals són localment ben plantejades. Tot i això, cal determinar si existeixen solucions globals i si aquestes solucions són prou ben comportades. Una possibilitat preocupant (que s’ha confirmat amb simulacions numèriques), és un canvi del caràcter de l’equació de moviment, d’hiperbòlica a parabòlica i finalment a el·líptica
Ecosophy: towards an understanding of the wisdom of the earth from Raimon Panikkar's notion of the rhythm of being
No full textThis article presents important ideas in Raimon Panikkar's notion of ecosophy, thus entering more deeply into the wisdom of the oikos. The aim is to highlight the originality of our author's ecosophical proposal, fruit of a fertile intercultural and inter-religious dialogue (Hinduism, Christianity and Buddhism). Although the author did not develop systematically the notion of ecosophy, the ontology of his mature years, expressed in the notion of the rhythm of being, can bring us closer to a new understanding of this wisdom, manifested in a becoming in which the divine, the human and the cosmic each have a part. The article will show that Panikkar's notion of ecosophy sets us in the contemplative life and the wisdom of interindependence
El tensionado concepto de esperanza en tiempos de crisis ecológica
No full textThis article explores how to reconsider the concept of hope in times of ecological crisis. The author compares the interpretations of hope given by Jürgen Moltmann and Raimon Panikkar, and evaluates them from a liberation theology perspective.En este artículo se explora cómo reconsiderar el concepto de esperanza en tiempos de crisis ecológica. La autora compara las interpretaciones de la esperanza de Jürgen Moltmann y Raimon Panikkar, y las evalúa desde una perspectiva de la teología de la liberación
Large Holographic Collisions
No full textInternational audienceWe study collisions of Gaussian mass blobs in the large limit as a model for holographic shockwave collisions. The simplicity of the formalism allows us to perform the first 4+1 collisions in Einstein-Maxwell theory. We explore several collision scenarios with different blob shapes, impact parameters and charge values and find that collisions with impact parameter below the transverse width of the blobs are equivalent under rescaling. We also observe that charge weakly affects the rest of quantities. Finally, we study the entropy generated during collisions, both by charge diffusion and viscous dissipation. Multiple stages of linear entropy growth are identified, whose rates are not independent of the initial conditions
Micromagnetic study of magnetic droplet solitons in Spin Torque Oscillators
No full textTreballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Any: 2015, Tutor: Ferran Macià BrosSpin transfer torque allows excitation of magnetization dynamics in ferromagnetic thin films. An electric current
owing through a nanocontact to a ferromagnetic thin film can create spin waves, which are governed by the Landau-Lifschitz-Gilbert-Slonczewski equation. In this project we study the behavior of localized spin-wave modes, which are called magnetic droplet solitons. The system is analyzed with micromagnetic numerical simulations of an array of spins. We study the stability of magnetic droplet solitons. We analyzed the conditions for creation and annihilation and the effect of external applied fields
Percepción e interiorización del paisaje y construcción literaria. Una lectura geográfica de Els sots feréstecs, de Raimon Casellas (1901)
No full textProposem una lectura, des de l’òptica de la geografia, de la novel·la Els sots feréstecs de Raimon Casellas, publicada el 1901, amb gran èxit, i qualificada per la crítica com una obra rupturista i innovadora en diferents sentits —fins al punt de considerar-la com a paradigmàtica de la denominada “novel·la modernista”. Un aspecte que crida l’atenció de la novel·la és el protagonisme que hi té el paisatge —entès com el medi o escenari físic en el qual es desenvolupa la trama; aspecte, al cap i a la fi, que constitueix el nucli central de la nostra anàlisi i que, al llarg de l’article, tractem de contextualitzar adequadament a fi de permetre, en darrera instància, que la valoració de l’obra no es limiti a les seves qualitats literàries sinó que tingui també en compte el tractament dels aspectes d’ordre espacial i geogràfic, particularment original, que l’autor hi porta a terme.This study undertakes a geographical reading of the novel Els sots feréstecs (translated into English as Dark Vales) by Raimon Casellas and published in 1901. The book enjoyed great success, being described by critics as a ground-breaking, innovative work in many ways, with some even claiming it to be paradigmatic of the “modernist novel”. One striking aspect of the novel is the importance given to the landscape — understood here as the environment or physical setting in which the plot unfolds. It is this specific facet that constitutes the central core of the present article, which seeks to contextualize the landscape described, so that any appraisal of the novel is not simply limited to its literary qualities but also takes into account the original focus given by the author to the book’s spatial and geographical qualities.Proponemos una lectura, desde la óptica de la geografía, de la novela Els sots feréstecs (en la edición en castellano, Las cañadas indómitas) publicada en 1901, con gran éxito, y calificada por la crítica como una obra rupturista e innovadora en diferentes sentidos —hasta el punto de considerarla como paradigmática de la denominada “novela modernista”. Un aspecto que llama la atención de la novela es el protagonismo que tiene en ella el paisaje —entendido como el medio o escenario físico en el que se desarrolla la trama—; aspecto, al fin y al cabo, que constituye el núcleo central de nuestro análisis y que, a lo largo del artículo, tratamos de contextualizar adecuadamente a fin de permitir, en última instancia, que la valoración de la obra no se circunscriba a sus cualidades literarias sino que tenga también en cuenta el tratamiento de los aspectos de orden espacial y geográfico, particularmente original, que el autor lleva a cabo
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