The Populist Process: A theoretical contribution to the debate of the phenomenon

Indexación: Scopus.Aun cuando podría definirse el populismo como un juego discursivo (subsumido en lógicas equivalenciales y diferenciales) de tipo hegemónico entre el pueblo y el bloque de poder, en este artículo, se concibe al populismo como un proceso histórico que obedece a distintas condiciones de posibilidad. Se argumenta que todo proceso populista requiere de una articulación discursiva y de profunda movilización en un contexto de crisis hegemónica. Conceptualmente ello se traduce en la existencia de un momento, fenómeno y un régimen populista.Although the Populism would be defined as a hegemonic discursive “game” (subsumed in different-equivalent logics) between the people and the power spheres; in this article, Populism herein is understood as a historical process that would occur under certain conditions. It is argued that any populist process needs a context of hegemonic crisis and deep mobilization. Conceptually, this means that there is a populist moment, phenomenon and regime

Una clase especial de Hipersuperficies parametrizadas por líneas de curvatura en R4

In this paper we study hypersurfaces in R4 parametrized by lines of curvature with three distinct principal curvatures and with Laplace invariants mji = mki = 0; mjik 6= 0 for i; j; k distinct fixed indices. We characterize locally a generic family of such hypersurfaces in terms of the principal curvatures and three vector valued functions of one variable, this family includes a classe of Dupin hypersurfaces. Moreover, weshow that these vector valued functions are invariant under inversions and homotheties.En este artículo estudiamos hipersuperficies en R4 parametrizadas por líneas de curvatura con tres curvaturas principales distintas y con invariantes de Laplace mji = mki = 0; mjik 6= 0 para índices fijos i; j; k distintos. Caracterizamos localmente una familia genérica de tales hipersuperficies en términos de las curvaturas principales y tres funciones vectoriales de una variable, esta familia incluye una clase de hipersuperficies de Dupin. Ademas, mostramos que estas funciones vectoriales son invariantes por inversiones y dilataciones

Quasipinning and selection rules for excitations in atoms and molecules

Postulated by Pauli to explain the electronic structure of atoms and molecules, the exclusion principle establishes an upper bound of 1 for fermionic natural occupation numbers {ni }. A recent analysis of the pure N-representability problem provides a wide set of inequalities for the {ni}, leading to constraints on these numbers. This has a strong potential impact on reduced density matrix functional theory as we know it. In this work we continue our study of the nature of these inequalities for some atomic and molecular systems. The results indicate that (quasi)saturation of some of them leads to selection rules for the dominant configurations in configuration interaction expansions, in favorable cases providing means for significantly reducing their computational requirements

Anatomical Study of the Accessory Head of the Flexor Pollicis Longus Muscle and its Relationship to the Anterior Interosseous Nerve in Brazilian Individuals

Indexación: Web of Science; Scielo.RESUMEN: Entre los síndromes de compresión nerviosa en el antebrazo, debido a la presencia de arcos tendinosos de músculos relacionados al trayecto de los nervios que transcurren entre sus capas musculares, se encuentra el del nervio interóseo anterior (NIA). La presencia de variaciones musculares puede generar arcos que ocasionan compresión nerviosa. El objetivo fue establecer la incidencia y morfología del músculo accesorio del flexor largo del pulgar (AFLP) y la relación de éste con el NIA o sus ramos motores. Se utilizaron 30 antebrazos, de cadáveres formolizados de individuos adultos brasileños. El punto de referencia seleccionado para las mediciones fue el epicóndilo medial del humero (EMH). Se observó que tres miembros superiores presentaron el AFLP (10%), en todos ellos se originó en el EMH para terminar insertándose en el tendón del músculo flexor largo del pulgar (FLP). El vientre muscular presentó aspecto fusiforme, el cual tenía un tendón que formó un arco con el FLP. En uno de los casos, este arco se relacionó con el paso del NIA; en los otros dos, lo hizo con los ramos motores que se originan del NIA. Al diagnosticar los síndromes generados por compresión nerviosa se debe considerar la presencia del AFLP, el cual, potencialmente se puede relacionar con el trayecto del NIA o de sus ramos.SUMMARY: Between the syndromes of nerve compression in the forearm, due to the presence of the tendinous arches related to the nerves that pass between its muscle layers, is the anterior interosseous nerve (AIN). The presence of muscular variations can generate arches that cause nerve compression. The aim of our study was to establish the incidence and morphology of the accessory head of flexor pollicis longus muscle (AFPLm) and its relationship with AIN or its branches. Thirty forearms of formalized corpses of adult Brazilians were used. The selected landmark for measurements was the medial epicondyle of the humerus (MEH). It was noted that three upper limbs presented the AFPLm (10%), originated from the MEH to end inserted into the tendon of the flexor pollicis longus muscle. The AFPLm showed fusiform appearance, which had a tendon that formed an arch with the flexor pollicis longus muscle. In one case, this arch was associated with the passage of AIN. In the other two, this arch was related to motor branches originating from the AIN. The diagnosis of nerve compression syndromes should consider the presence of AFLPm, which potentially can be related to the course of the AIN or its branches.http://ref.scielo.org/yjjjr

Ecuación de Helmholtz generalizada

In this paper we introduce the generalized Helmholtz equation and present explicit solutions to this generalized Helmholtz equation, these solutions depend on three holomorphic functions. As an application we present explicit solutions to the Helmholtz equation. We note that these solutions are not necessarily limited to certain domains of the complex plane C.En este artículo introducimos la ecuación de Helmholtz generalizada y presentamos soluciones explícitas para esta ecuación de Helmholtz generalizada, estas soluciones dependen de tres funciones holomorfas. Como aplicación presentamos soluciones explícitas para la ecuación de Helmholtz. Observamos que estas soluciones nonecesariamente estan limitadas a ciertos dominios del plano complejo C

Bounded repairability for regular tree languages

We study the problem of bounded repairability of a given restriction tree language R into a target tree language T. More precisely, we say that R is bounded repairable w.r.t. T if there exists a bound on the number of standard tree editing operations necessary to apply to any tree in R in order to obtain a tree in T. We consider a number of possible specifications for tree languages: bottom-up tree automata (on curry encoding of unranked trees) that capture the class of XML Schemas and DTDs. We also consider a special case when the restriction language R is universal, i.e., contains all trees over a given alphabet. We give an effective characterization of bounded repairability between pairs of tree languages represented with automata. This characterization introduces two tools, synopsis trees and a coverage relation between them, allowing one to reason about tree languages that undergo a bounded number of editing operations. We then employ this characterization to provide upper bounds to the complexity of deciding bounded repairability and we show that these bounds are tight. In particular, when the input tree languages are specified with arbitrary bottom-up automata, the problem is coNEXPTIME-complete. The problem remains coNEXPTIME-complete even if we use deterministic non-recursive DTDs to specify the input languages. The complexity of the problem can be reduced if we assume that the alphabet, the set of node labels, is fixed: the problem becomes PSPACE-complete for non-recursive DTDs and coNP-complete for deterministic non-recursive DTDs. Finally, when the restriction tree language R is universal, we show that the bounded repairability problem becomes EXPTIME-complete if the target language is specified by an arbitrary bottom-up tree automaton and becomes tractable (PTIME-complete, in fact) when a deterministic bottom-up automaton is used

Physical Wigner functions

In spite of their potential usefulness, the characterizations of Wigner functions for Bose and Fermi statistics given by O'Connell and Wigner himself almost thirty years ago has drawn little attention. With an eye towards applications in quantum chemistry, we revisit and reformulate them in a more convenient way.Comment: Latex, 10 page