Estudio preventivo de la displasia de cadera en 130 perros combinando el método PennHIp y la sinfisiodesis pública

Realizamos un estudio de 130 cachorros de razas superiores a 20 kg, midiendo el índice de distracción mediante el método PennHip, test Bardens y de Ortolani. El resultado final es que el 70% es susceptible de sufrir displasia. Se realiza la sinfisiodesis pública juvenil y el 95% a los 7-8 meses de edad tienen una displasia grado A-B

Hysteresis and Avalanches in the Random Anisotropy Ising Model

The behaviour of the Random Anisotropy Ising model at T=0 under local relaxation dynamics is studied. The model includes a dominant ferromagnetic interaction and assumes an infinite anisotropy at each site along local anisotropy axes which are randomly aligned. Two different random distributions of anisotropy axes have been studied. Both are characterized by a parameter that allows control of the degree of disorder in the system. By using numerical simulations we analyze the hysteresis loop properties and characterize the statistical distribution of avalanches occuring during the metastable evolution of the system driven by an external field. A disorder-induced critical point is found in which the hysteresis loop changes from displaying a typical ferromagnetic magnetization jump to a rather smooth loop exhibiting only tiny avalanches. The critical point is characterized by a set of critical exponents, which are consistent with the universal values proposed from the study of other simpler models.Comment: 40 pages, 21 figures, Accepted for publication in Phys. Rev.

La nova edició espanyola de la CDU : arriscar-se al canvi?

Analise of the Medium CDU spanish edition. Avaluation of the news titles, indexs tables, etc

CP conserving constraints on Supersymmetric CP violation in the MSSM

We address the following question. Take the Constrained Minimal Supersymmetric Standard Model (CMSSM) with the two CP violating SUSY phases different from zero, and neglect the bound coming from the electric dipole moment of the neutron (EDM): is it possible to fully account for CP violation in the kaon and B systems using only the SUSY contributions with vanishing CKM phase? We show that the ${BR}(B\to X_{s} \gamma)$ constraint, though CP conserving, forces a negative answer to the above question. This implies that, even in the regions of the CMSSM where a cancellation of different contributions to the EDM allows for large SUSY phases, it is not possible to exploit the SUSY phases to fully account for observable CP violation. Hence to have sizeable SUSY contributions to CP violation, one needs new flavor structures in the sfermion mass matrices beyond the usual CKM matrix

Cold Positrons from Decaying Dark Matter

Many models of dark matter contain more than one new particle beyond those in the Standard Model. Often heavier particles decay into the lightest dark matter particle as the Universe evolves. Here we explore the possibilities that arise if one of the products in a (Heavy Particle) $\rightarrow$ (Dark Matter) decay is a positron, and the lifetime is shorter than the age of the Universe. The positrons cool down by scattering off the cosmic microwave background and eventually annihilate when they fall into Galactic potential wells. The resulting 511 keV flux not only places constraints on this class of models but might even be consistent with that observed by the INTEGRAL satellite.Comment: 20 pages, 7 figure

Universal Power Law in the Noise from a Crumpled Elastic Sheet

Using high-resolution digital recordings, we study the crackling sound emitted from crumpled sheets of mylar as they are strained. These sheets possess many of the qualitative features of traditional disordered systems including frustration and discrete memory. The sound can be resolved into discrete clicks, emitted during rapid changes in the rough conformation of the sheet. Observed click energies range over six orders of magnitude. The measured energy autocorrelation function for the sound is consistent with a stretched exponential C(t) ~ exp(-(t/T)^{b}) with b = .35. The probability distribution of click energies has a power law regime p(E) ~ E^{-a} where a = 1. We find the same power law for a variety of sheet sizes and materials, suggesting that this p(E) is universal.Comment: 5 pages (revtex), 10 uuencoded postscript figures appended, html version at http://rainbow.uchicago.edu/~krame

Strategy for the sustainable development of Catalonia: sustainability as a driving force to competitivity and quality

L'Estratègia per al desenvolupament sostenible de Catalunya neix dels mandats a diverses escales -local, nacional, estatal i internacional- i de la necessitat real de fer front als reptes socioambientals de Catalunya. Aquests reptes són de caràcter global, sovint identificats en acords i convenis internacionals (e.g. lluita contra el canvi climàtic), i de tipus local, amb especial rellevància per Catalunya, com pot ser la temàtica de l'aigua. L'elaboració de l'Estratègia ha partit d'una metodologia matricial que ha permès aconseguir una visió trans-sectorial, integradora i transdisciplinar que fes emergir tant els aspectes locals com els més globals. La matriu desenvolupada relaciona els sectors econòmics amb els àmbits social i ambiental. L'enfocament prioritari que dóna la matriu a la vessant econòmica respon, no només al context socioeconòmic actual de la crisi econòmica i financera mundial, sinó també a la prioritat establerta en l'Estratègia a la internalització de les externalitats de les activitats econòmiques. La interacció d'ambdós nivells (àmbits i sectors econòmics) augmenta l'operativitat de l'Estratègia, ja que unifica els nivells d'anàlisi per la identificació dels reptes i mesures d'actuació i el seu grau de transversalitat. L'Estratègia ha donat un paper rellevant a la governança, com a repte transversal i catalitzador del canvi cap a escenaris més sostenibles. Simultàniament al procés de redacció de l'Estratègia, s'ha dissenyat un procés de participació i debat, que compta amb el debat intern en el sí de la Generalitat de Catalunya, un consell consultiu, una mesa local i sessions de participació ciutadana, tant amb col·lectius específics com amb ciutadans individuals.La Estrategia de desarrollo sostenible de Cataluña nace de los mandatos de diversas escalas -local, nacional, estatal e internacional- y de la necesidad real de hacer frente a los retos socioambientales de Cataluña. Estos retos son de carácter global, a menudo identificados en acuerdos y convenios internacionales (e.g. lucha frente al cambio climático), y de tipo local, con especial relevancia para Cataluña, como pueden ser las temáticas relacionadas con el agua. La elaboración de la Estrategia ha seguido una metodología matricial que ha permitido tener en todo momento una visión trans-sectorial, integradora y transdisciplinar tanto para los aspectos locales como los globales. La matriz desarrollada relaciona los sectores económicos con los ámbitos sociales y ambientales. El enfoque prioritario que da la matriz a los sectores económicos responde, no solamente al contexto socioeconómico actual de crisis económica y financiera mundial, sino también a la prioridad establecida en la Estrategia para internalizar las externalidades de las actividades económicas. La interacción entre los dos niveles (ámbitos y sectores económicos) aumenta la operatividad de la Estrategia ya que unifica los niveles de análisis para la identificación de los retos y las medidas de actuación y su grado de transversalidad. La Estrategia da un papel relevante a la governanza como reto transversal y catalizador del cambio hacia escenarios más sostenibles. Simultáneamente al proceso de redacción de la Estrategia, se ha diseñado un proceso de participación y debate que cuenta con el debate interno en la misma Generalitat de Cataluña, un consejo consultivo, una mesa local y unas sesiones de participación ciudadana, tanto con colectivos específicos como con ciudadanos individuales.The Strategy for the Sustainable Development of Catalonia appears in the context of local, national and international mandates and responds to the real need to face different social and environmental challenges in Catalonia. Some of these challenges are global -already mentioned in several international conventions (e.g. to solve the climate change)- and some other are of regional specificity - as the water issues in Catalonia-. The methodology to develop the Catalan strategy was based on a matrix, that related the economic activity sectors with the social and environmental issues and offered a trans-sectorial, integrated and trans-disciplinary vision of the challenges. The priority given to the economic sector responds, on one hand, to the actual world context of economic and financial crisis but also, on the other hand, to internalize the social and environmental externalities of the economic activities, which is one of the main objectives of the Catalan strategy. Governance issues play also an important role in the strategy as being considered essential to achieve more sustainable scenarios. Simultaneously to the elaboration of the written proposal by the government, a participatory process has been carried out with the Strategy expert panel, the local and municipal authorities and with the citizen participation.Peer Reviewe

Low field hysteresis in disordered ferromagnets

We analyze low field hysteresis close to the demagnetized state in disordered ferromagnets using the zero temperature random-field Ising model. We solve the demagnetization process exactly in one dimension and derive the Rayleigh law of hysteresis. The initial susceptibility a and the hysteretic coefficient b display a peak as a function of the disorder width. This behavior is confirmed by numerical simulations d=2,3 showing that in limit of weak disorder demagnetization is not possible and the Rayleigh law is not defined. These results are in agreement with experimental observations on nanocrystalline magnetic materials.Comment: Extended version, 18 pages, 5 figures, to appear in Phys. Rev.

Prospects for discovering supersymmetric long-lived particles with MoEDAL

We present a study on the possibility of searching for long-lived supersymmetric partners with the MoEDAL experiment at the LHC. MoEDAL is sensitive to highly ionising objects such as magnetic monopoles or massive (meta)stable electrically charged particles. We focus on prospects of directly detecting long-lived sleptons in a phenomenologically realistic model which involves an intermediate neutral long-lived particle in the decay chain. This scenario is not yet excluded by the current data from ATLAS or CMS, and is compatible with astrophysical constraints. Using Monte Carlo simulation, we compare the sensitivities of MoEDAL versus ATLAS in scenarios where MoEDAL could provide discovery reach complementary to ATLAS and CMS, thanks to looser selection criteria combined with the virtual absence of background. It is also interesting to point out that, in such scenarios, in which charged staus are the main long-lived candidates, the relevant mass range for MoEDAL is compatible with a potential role of Supersymmetry in providing an explanation for the anomalous events observed by the ANITA detector.Comment: 12 pages, 6 figures; preliminary results presented in arXiv:1903.11022; matches published version in EPJ