Música y deconstrucción

Música y, con ella, una serie de presupuestos asociados, sin los cuales el acto musical entendido como tal no puede llevarse a cabo: 1. Delimitación de lo musical dentro de una esfera previamente definida, cerrando una posible permeabilidad político-social de su discurso. 2. Ordenación de su material de acuerdo con unos modelos jerárquicos impuestos. 3. Separación categorial de los elementos musicales, que niegan la posibilidad de existencia de fenómenos intercategoriales que cuestionen la arbitrariedad de las categorías fijadas. 4. Y como último y quizá también primer presupuesto: continuismo en la definición de lo que la música debe y no debe ser. Tomando como referencia conceptual -pero, en ningún caso, operativa- la deconstrucción iniciada por Derrida a la que son sometidos presupuestos filosófico-textuales de origen similar a los musicales, el presente texto trata de abordar si y, en caso afirmativo, cómo diversos dogmas, estrategias de poder e invisibilidades pueden hacerse visibles a través de la deconstrucción de los presupuestos musicales en los que se inscriben; todo ello, tratando de evitar la imposible y contradictoria extrapolación de constructos filosóficos al ámbito de lo artístico, en aras de una observación y deconstrucción de la problemática musical desde dentro de su propia realidad, si es que realmente podemos hablar de «una».Music: here, a set of presupposed characteristics is intended, without which the «Musical Act» cannot exist: 1. Delimitation of the musical act within a pre-defined realm, aborting the potential socio-political permeation of its discourse. 2. Arrangement of the musical material according to imposed hierarchical models. 3. Categorical separation of differing elements, thereby preventing the existence of inbetween phenomena which might otherwise call into question the arbitrary nature of the fixed categories. 4. And last, but not least, continuity in the definition of what music should and should not be. Taking Derrida's deconstructive procedures as a conceptual -but nonetheless operative- reference, to which philosophical and textual assumptions sharing similar origins with the musical assumptions are exposed, the present article contemplates if and how dogmas, power strategies, and indiscernable elements can be made apparent through the deconstruction of musical assumptions to which they subscribe; everything avoiding the impossible and contradictory extrapolation of philosophical constructs into the realm of the art, in pro of an observation and deconstruction of the musical problematic within its own reality, if we really can speak about «one»

El siglo XVI en novelas y cuentos históricos peruanos contemporáneos

A través de una serie de relatos históricos de escritores peruanos, se explican las principales características de este tipo de narrativa en el Perú contemporáneo, empezando por el interés de los autores por el período colonial, y, dentro de él, por el siglo XVI. En el análisis queda patente la importancia concedida al primer siglo de la Colonia, como momento de forja de la identidad peruana, así como la calidad de algunos de estos relatos, poco conocidos fuera del Perú. This article analyses the main features of the historical tales and contemporary novels in peru. The writers of these works have been attracted by this colonial period, especially, the Sixteenth Century. This analysis shows the importance of this period as the moment in which Peruvian identify is formed

MOND as the weak-field limit of an extended metric theory of gravity

We show that the Modified Newtonian Dynamics (MOND) regime can be fully recovered as the weak-field limit of a particular theory of gravity formulated in the metric approach. This is possible when Milgrom's acceleration constant is taken as a fundamental quantity which couples to the theory in a very consistent manner. As a consequence, the scale invariance of the gravitational interaction is naturally broken. In this sense, Newtonian gravity is the weak-field limit of general relativity and MOND is the weak-field limit of that particular extended theory of gravity.Comment: To appear in the proceedings of the 2011 Spanish Relativity Meeting (ERE2011) held in Madrid, Spain, 4 page

Sexual Differences in Prevalence of a New Species of Trypanosome Infecting Túngara Frogs

Trypanosomes are a diverse group of protozoan parasites of vertebrates transmitted by a variety of hematophagous invertebrate vectors. Anuran trypanosomes and their vectors have received relatively little attention even though these parasites have been reported from frog and toad species worldwide. Blood samples collected from túngara frogs (Engystomops pustulosus), a Neotropical anuran species heavily preyed upon by eavesdropping frog-biting midges (Corethrella spp.), were examined for try- panosomes. Our results revealed sexual differences in trypanosome prevalence with female frogs being rarely infected (\u3c1%). This finding suggests this protozoan parasite may be transmitted by frog-biting midges that find their host using the mating calls produced by male frogs. Following previous anuran trypanosome studies, we examined 18S ribosomal RNA gene to characterize and establish the phylo- genetic relationship of the trypanosome species found in túngara frogs. A new species of giant trypanosome, Trypanosoma tungarae n. sp., is described in this study. Overall the morphometric data revealed that the trypomastigotes of T. tungarae n. sp. are similar to other giant trypanosomes such as Trypanosoma rotatorium and Trypanosoma ranarum. Despite its slender and long cell shape, however, 18S rRNA gene sequences revealed that T. tungarae n. sp. is sister to the rounded-bodied giant trypanosome, Trypanosoma chattoni. Therefore, morphological convergence explains similar morphology among members of two non-closely related groups of trypanosomes infecting frogs. The results from this study underscore the value of coupling morphological identification with molecular characterization of anuran trypanosomes

Optimal existence classes and nonlinear-like dynamics in the heat equation in Rd

We analyse the behaviour of solutions of the linear heat equation in R d for initial data in the classes M ε (Rd) of Radon measures with ∫ R d e − ε | x | 2 d | u 0 | 0 M ε (Rd) consists precisely of those initial data for which the a solution of the heat equation can be given for all time using the heat kernel representation formula. After considering properties of existence, uniqueness, and regularity for such initial data, which can grow rapidly at infinity, we go on to show that they give rise to properties associated more often with nonlinear models. We demonstrate the finite-time blowup of solutions, showing that the set of blowup points is the complement of a convex set, and that given any closed convex set there is an initial condition whose solutions remain bounded precisely on this set at the ‘blowup time’. We also show that wild oscillations are possible from non-negative initial data as t →∞ (in fact we show that this behaviour is generic), and that one can prescribe the behaviour of u (0 ,t ) to be any real-analytic function γ ( t ) on [0 , ∞ )