Euler Chern Simons Gravity from Lovelock Born Infeld Gravity

In the context of a gauge theoretical formulation, higher dimensional gravity invariant under the AdS group is dimensionally reduced to Euler-Chern-Simons gravity. The dimensional reduction procedure of Grignani-Nardelli [Phys. Lett. B 300, 38 (1993)] is generalized so as to permit reducing D-dimensional Lanczos Lovelock gravity to d=D-1 dimensions.Comment: 6 pages, no figures, accepted for publication in Phys. Lett.

Standard General Relativity from Chern-Simons Gravity

Chern-Simons models for gravity are interesting because they provide with a truly gauge-invariant action principle in the fiber-bundle sense. So far, their main drawback has largely been the perceived remoteness from standard General Relativity, based on the presence of higher powers of the curvature in the Lagrangian (except, remarkably, for three-dimensional spacetime). Here we report on a simple model that suggests a mechanism by which standard General Relativity in five-dimensional spacetime may indeed emerge at a special critical point in the space of couplings, where additional degrees of freedom and corresponding "anomalous" Gauss-Bonnet constraints drop out from the Chern-Simons action. To achieve this result, both the Lie algebra g and the symmetric g-invariant tensor that define the Chern-Simons Lagrangian are constructed by means of the Lie algebra S-expansion method with a suitable finite abelian semigroup S. The results are generalized to arbitrary odd dimensions, and the possible extension to the case of eleven-dimensional supergravity is briefly discussed.Comment: 6 pages, no figures; v2: published versio

Futebol e pósnacionalismo: torcedores em trânsito na narrativa argentina

IX Congresso Brasileiro de Hispanistas realizado nos dias 22 a 25 agosto 2016Em um cenário de crescentes deslocamentos, observamos a forte presença da territorialização de microespaços na paixão de torcidas, que compartilham traços de pertencimento em comum, demonstrando novas dinâmicas identitárias provenientes de tempos líquidos. Através dos relatos de futebol, podem ser observados movimentos de subjetividades que jogam na tensão entre os âmbitos global e local, o que promoverá um enfraquecimento da ideia de Estadonação e abrirá portas para outros modos de (re)ler e (re)escrever a sociedade. Dessa maneira, por meio da análise das interrelações entre torcedores, pretendese pensar aqui como torcidas de futebol refletem diferentes problemáticas sociais e como ambientes de trânsito proporcionam a reestruturação de grupos de sujeitos em “comunidades imaginadas”. A partir da leitura dos contos “Hinchada hay uma sola” de Alejandro Parisi (2008), “Esperándolo a Tito” (2000) e “El golpe del hormiga” (2004) de Eduardo Sacheri, é objetivo deste trabalho relacionar o processo do “drama social” que compõe a formação de imaginários de “comunidades emocionais” ao cenário globalizado em que se circunscrevem os relatos pósnacionais de torcedores de futebol na nova narrativa argentinaUNILA­-UNIOEST

«Una perfecta princesa». Casa y vida de la reina Isabel de Valois (1559-1568). Primera Parte

Two facts stand out in the life of Isabel de Valois: her marriage at the age of 13 to Philip II of Spain, and her death, aged 22. Her early death and the survival of some striking portraits have contributed in good measure to the aura of romantic tragedy that still envelops her. But little is known about her character or her role as queen. This study seeks to get closer to her personality and to the life she led primarily through the extant documentation about her household. It traces the personal and political forces that shaped the queen’s franco-spanish household and some of the strong pressures she was under from a young age. It demonstrates that Isabel was incapable of dealing with her vital role as head of the mass of people who made up the royal household, and examines some of the grave consequences both for individuals and for royal authority. The staggering and unsustainable debts she accumulated are also evaluated. This chapter probes deeper into how the Spanish court functioned in the sixteenth-century and explores the relative importance of personality and external limitations in the success and failure of the queen

Dual Formulation of the Lie Algebra S-expansion Procedure

The expansion of a Lie algebra entails finding a new, bigger algebra G, through a series of well-defined steps, from an original Lie algebra g. One incarnation of the method, the so-called S-expansion, involves the use of a finite abelian semigroup S to accomplish this task. In this paper we put forward a dual formulation of the S-expansion method which is based on the dual picture of a Lie algebra given by the Maurer-Cartan forms. The dual version of the method is useful in finding a generalization to the case of a gauge free differential algebra, which in turn is relevant for physical applications in, e.g., Supergravity. It also sheds new light on the puzzling relation between two Chern-Simons Lagrangians for gravity in 2+1 dimensions, namely the Einstein-Hilbert Lagrangian and the one for the so-called "exotic gravity".Comment: 12 pages, no figure

The BTZ black hole as a Lorentz-flat geometry

It is shown that 2+1 dimensional anti-de Sitter spacetimes are Lorentz-flat. This means, in particular, that any simply-connected patch of the BTZ black hole solution can be endowed with a Lorentz connection that is locally pure gauge. The result can be naturally extended to a wider class of black hole geometries and point particles in three-dimensional spacetime.Comment: 2 page

«Una perfecta princesa» Casa y vida de la reina Isabel de Valois (1559-1568). Segunda parte

Este breve estudio examina el papel que debía desempeñar la reina Isabel de Valois además de ejercer autoridad sobre su casa. Se analiza primero su papel político, enfocando particularmente su deber principal, que era facilitar las relaciones entre Francia y Felipe II, y ofreciendo algunas razones para explicar su escaso éxito. Se propone que su asociación con Francia fue demasiado fuerte como para permitirle desarrollar un papel de mediadora efectivo. El deber fundamental de toda mujer en esta época era el de ser madre y buena esposa, pero por su posición y debido a la situación vigente, las expectativas eran mayores y la presión que sufrió Isabel fue enorme. Se analiza aquí el impacto que tuvo la maternidad en sus relaciones con Felipe II y los intentos de forjar la imagen de un perfecto matrimonio pese a la existencia de inevitables tensiones y problemas entre los cónyuges. Finalmente, se ofrecen algunas conclusiones sobre las fuentes, sobre la proyección de sentimientos privados en el ámbito público, y la transfiguración de un personaje mediocre en una imagen idealizada.This brief study analises the various roles assigned to Isabel de Valois besides controlling her household. It begins with an analysis of her political role and in particular of her primary political duty, which was to improve relations between France and Philip II. It examines how she carried out these tasks and offers some explanations for her lack of success. It is argued here that her association with France was always too strong for her to mediate successfully between them. Her fundamental role, as that of all women, was to be a mother and good wife, but by virtue of her position and circumstances she was burdened with additional expectations and endured enormous pressures. The impact of maternity on her relations with Philip II is examined here, as is the process of creating the image of a perfect marriage, despite the inevitable tensions and problems that existed between them. It offers some conclusions on the sources, on the proyection of private feelings in a public sphere, and on the transfiguration of a mediocre personality into an idealised imag

Higher dimensional gravity invariant under the AdS group

A higher dimensional gravity invariant both under local Lorentz rotations and under local Anti de Sitter boosts is constructed. It is shown that such a construction is possible both when odd dimensions and when even dimensions are considered. It is also proved that such actions have the same coefficients as those obtained by Troncoso and Zanelli.Comment: 5 pages, no figures; final version to appear in Phys. Lett.

Rasgos de personalidad y compromiso organizacional en colaboradores de una municipalidad de Trujillo

La presente investigación tuvo como objetivo determinar la relación entre rasgos de personalidad y compromiso organizacional en colaboradores de una municipalidad de la provincia de Trujillo, la misma que es una investigación con diseño correlacional, se trabajó con una muestra de 150 colaboradores a quienes se aplicó el Cuestionario de Compromiso Organizacional y el Cuestionario Big Five Questionnaire (BFQ). Se encontró que existe una correlación directa y altamente significativa (p<.01) entre los rasgos de personalidad energía, afabilidad, tesón, estabilidad emocional, apertura mental y compromiso organizacional.The objective of this research was to determine the relationship between personality traits and organizational commitment in collaborators of a municipality in the province of Trujillo, which is a research with correlational design, it was worked with a sample of 150 collaborators to whom the Organizational Commitment Questionnaire and the Big Five Questionnaire (BFQ). It was found that there is a direct and highly significant correlation (p <.01) between the personality traits energy, affability, tenacity, emotional stability, openmindedness and organizational commitment.Tesi