Rational points on X_0^+ (p^r)

We show how the recent isogeny bounds due to \'E. Gaudron and G. R\'emond allow to obtain the triviality of X_0^+ (p^r)(Q), for r>1 and p a prime exceeding 2.10^{11}. This includes the case of the curves X_split (p). We then prove, with the help of computer calculations, that the same holds true for p in the range 10 < p < 10^{14}, p\neq 13. The combination of those results completes the qualitative study of such sets of rational points undertook in previous papers, with the exception of p=13.Comment: 16 pages, no figur

Neutrino mixing and masses in a left-right model with mirror fermions

In the framework of a left-right model containing mirror fermions with gauge group SU(3)$_{C} \otimes SU(2)_{L} \otimes SU(2)_{R} \otimes U(1)_{Y^\prime}$, we estimate the neutrino masses, which are found to be consistent with their experimental bounds and hierarchy. We evaluate the decay rates of the Lepton Flavor Violation (LFV) processes $\mu \rightarrow e \gamma$, $\tau \rightarrow \mu \gamma$ and $\tau \rightarrow e\gamma$. We obtain upper limits for the flavor-changing branching ratios in agreement with their present experimental bounds. We also estimate the decay rates of heavy Majorana neutrinos in the channels $N \rightarrow W^{\pm} l^{\mp}$, $N \rightarrow Z \nu_{l}$ and $N \rightarrow H \nu_{l}$, which are roughly equal for large values of the heavy neutrino mass. Starting from the most general Majorana neutrino mass matrix, the smallness of active neutrino masses turns out from the interplay of the hierarchy of the involved scales and the double application of seesaw mechanism. An appropriate parameterization on the structure of the neutrino mass matrix imposing a symmetric mixing of electron neutrino with muon and tau neutrinos leads to Tri-bimaximal mixing matrix for light neutrinos.Comment: Accepted by European Physical Journal

Double non-perturbative gluon exchange: an update on the soft Pomeron contribution to pp scattering

We employ a set of recent, theoretically motivated, fits to non-perturbative unquenched gluon propagators to check in how far double gluon exchange can be used to describe the soft sector of pp scattering data (total and differential cross section). In particular, we use the refined Gribov--Zwanziger gluon propagator (as arising from dealing with the Gribov gauge fixing ambiguity) and the massive Cornwall-type gluon propagator (as motivated from Dyson-Schwinger equations) in conjunction with a perturbative quark-gluon vertex, next to a model based on the non-perturbative quark-gluon Maris-Tandy vertex, popular from Bethe-Salpeter descriptions of hadronic bound states. We compare the cross sections arising from these models with "older" ISR and more recent TOTEM and ATLAS data. The lower the value of total energy \sqrt{s}, the better the results appear to be.Comment: 14 pages, 8 .pdf figures. To appear in Phys.Rev.

Remarks on the representation theory of the Moyal plane

We present an explicit construction of a unitary representation of the commutator algebra satisfied by position and momentum operators on the Moyal plane.Comment: 10 pages, minor changes, refs. adde

On the noncommutative eikonal

We study the eikonal approximation to quantum mechanics on the Moyal plane. Instead of using a star product, the analysis is carried out in terms of operator-valued wavefunctions depending on noncommuting, operator-valued coordinates.Comment: 18 page

ABORDAJE FISIOTERAPÉUTICO CON TERAPIA MANUAL EN PACIENTES CON CAPSULITIS ADHESIVA

IntroducciónEl hombro es una articulación muy compleja que es crucial para muchas actividades de la vida diaria. La disminución de la movilidad del hombro es un hallazgo clínico grave. Una disminución global del rango de movimiento del hombro se denomina capsulitis adhesiva, en referencia a la adhesión real de la cápsula del hombro a la cabeza del húmero.Presentación del caso.El objetivo de este  artículo es la presentación es presentar la terapia manual como un alternativa innovadora en el trata miento de la capsulitis adhesiva.Discusión.  El presente estudio de caso permitió desarrollar procesos de aprendizaje clínico mediante la reflexión crítica, el análisis y la toma de decisiones oportuna con base a evidencia científica.Conclusión.Es necesario buscar alternativas de tratamiento, como lo fue en este caso la terapia manual unificando criterios para la toma de decisiones de intervenciones fisioterapéuticas efectivas en cuanto al manejo de las deficiencias encontradas en el paciente

Neutrino masses and mixing parameters in a left-right model with mirror fermions

In this work we consider a left-right model containing mirror fermions with gauge group SU(3)$_{C} \otimes SU(2)_{L} \otimes SU(2)_{R} \otimes U(1)_{Y^\prime}$. The model has several free parameters which here we have calculated by using the recent values for the squared-neutrino mass differences. Lower bound for the mirror vacuum expectation value helped us to obtain crude estimations for some of these parameters. Also we estimate the order of magnitude of the masses of the standard and mirror neutrinos.Comment: 13 pages, version submitted to European Physical Journal

Comparative study of honey bee production with one and three queens by beehive in nueva imperial, IX region, Chile

In the Region of La Araucanía tests have been made where the production of honey of double queen beehives was compared to single queen beehives, with encouraging results. This motivated the accomplishment of this study in the zone of Nueva Imperial, which compared the conventional production of honey of triple queen systems and systems with one queen by beehive. For the accomplishment of this study 12 beehives were used, nine were grouped to form the triple queen systems and the remaining three with one queen were used as control. The research began on November 4th 2004, with weekly visits to control the factors that could affect the honey productions. The crop was made on January 11th 2005, reaching a honey production of 85 kg average for triple queens systems, which was significantly greater to the production obtained by the systems with a single queen which reached 19,17 kg of honey average.En la Región de La Araucanía se han realizado ensayos donde se comparó la producción de miel de colmenas doble reina y colmenas de una sola reina, con resultados alentadores. Esto motivó la realización de este estudio en la zona de Nueva Imperial, el cual comparó la producción de miel de sistemas de triple reina y sistemas convencionales con una reina por colmena. Para la realización de este estudio se utilizaron 12 colmenas, de las cuales nueve se agruparon para formar los sistemas triple reina, y las tres restantes con una reina fueron utilizadas como testigo. La investigación comenzó el 4 de noviembre del 2004, con visitas semanales, para controlar los factores que pudieran incidir en la producción de miel. La cosecha se realizó el 11 de enero de 2005, alcanzándose producciones promedio de 85 kg de miel para los sistemas triple reina, lo cual fue significativamente mayor a la producción lograda por los sistemas con una sola reina que alcanzaron 19,17 kg de miel promedio

On the noncommutative eikonal

We study the eikonal approximation to quantum mechanics on the Moyal plane. Instead of using a star product, the analysis is carried out in terms of operator-valued wavefunctions depending on noncommuting, operator-valued coordinates