Non-Containrnent of L in Projective Tensor Products of Banach Spaces

Sin resume

Phenomenology of Supersymmetric Theories with and without R-Parity

We review supersymmetry models with and without R-parity. After briefly describing the Minimal Supersymetric Standard Model and its particle content we move to models where R-parity is broken, either spontaneously or explicitly. In this last case we consider the situation where R-parity is broken via bilinear terms in the superpotential. The radiative breaking of these models is described in the context of $b$--$\tau$ and $b$--$\tau$--$t$ unification. Finally we review the phenomenology of these R-parity violating models.Comment: 9 pages, 5 Figures in Postscript. Talk given at the EuroConference on Frontiers in Particle Astrophysics and Cosmology, San Feliu de Guixols, Spain, 30 September - 5 October, 200

Are Gauss-Legendre methods useful in molecular dynamics?

AbstractWe apply the two-stage Gauss-Legendre method to the numerical simulation of liquid argon, a typical problem in molecular dynamics. It is found that the scheme is less efficient than the Verlet/leapfrog method, standard in this sort of simulation

Clinical evidence on high flow oxygen therapy and active humidification in adults

AbstractRecently there has been growing interest in an alternative to conventional oxygen therapy: the heated, humidified high flow nasal cannula oxygen therapy (HFNC). A number of physiological effects have been described with HFNC: pharyngeal dead space washout, reduction of nasopharyngeal resistance, a positive expiratory pressure effect, an alveolar recruitment, greater humidification, more comfort and better tolerance by the patient, better control of FiO2 and mucociliary clearance. There is limited experience of HFNC in adults. There are no established guidelines or decision-making pathways to guide use of the HFNC therapy for adults. In this article we review the existing evidence of HFNC oxygen therapy in adult patients, its advantages, limitations and the current literature on clinical applications. Further research is required to determine the long-term effect of this therapy and identify the adult patient population to whom it is most beneficial

Simple approach to the mesoscopic open electron resonator: Quantum current oscillations

The open electron resonator, described by Duncan et.al, is a mesoscopic device that has attracted considerable attention due to its remarkable behaviour (conductance oscillations), which has been explained by detailed theories based on the behaviour of electrons at the top of the Fermi sea. In this work, we study the resonator using the simple quantum quantum electrical circuit approach, developed recently by Li and Chen. With this approach, and considering a very simple capacitor-like model of the system, we are able to theoretically reproduce the observed conductance oscillations. A very remarkable feature of the simple theory developed here is the fact that the predictions depend mostly on very general facts, namely, the discrete nature of electric charge and quantum mechanics; other detailed features of the systems described enter as parameters of the system, such as capacities and inductances

Relative equilibria and bifurcations in the generalized van der Waals 4-D oscillator

A uniparametric 4-DOF family of perturbed Hamiltonian oscillators in 1:1:1:1 resonance is studied as a generalization for several models for perturbed Keplerian systems. Normalization by Lie-transforms (only first order is considered here) as well as geometric reduction related to the invariants associated to the symmetries is used based on previous work of the authors. A description is given of the lower dimensional relative equilibria in such normalized systems. In addition bifurcations of relative equilibria corresponding to three dimensional tori are studied in some particular cases where we focus on Hamiltonian Hopf bifurcations and bifurcations in the 3-D van der Waals and Zeeman systems

Solar Neutrino Masses and Mixing from Bilinear R-Parity Broken Supersymmetry: Analytical versus Numerical Results

We give an analytical calculation of solar neutrino masses and mixing at one-loop order within bilinear R-parity breaking supersymmetry, and compare our results to the exact numerical calculation. Our method is based on a systematic perturbative expansion of R-parity violating vertices to leading order. We find in general quite good agreement between approximate and full numerical calculation, but the approximate expressions are much simpler to implement. Our formalism works especially well for the case of the large mixing angle MSW solution (LMA-MSW), now strongly favoured by the recent KamLAND reactor neutrino data.Comment: 34 pages, 14 ps figs, some clarifying comments adde

Accountability of the media as seen by Spanish citizens

This article analyses the opinions of citizens on the core values of the so-called Media accountability: truthfulness, independence, transparency, public participation and respect for peoples’ rights. It also analyses citizens’ perceptions of various deontological instruments to measure the effectiveness of compliance with these ethical values. The qualitative methodology used to carry out this analysis is part of the R+D+I research project “Accountability and Journalistic Cultures project in Spain. Impact and proposal of good practices in the Spanish media” (MediaACES), which has been achieved through six focus groups in different Spanish cities. The results of the analysis reflect the critical spirit of citizens towards the media due to the following factors: the absence of objectivity, the mixture of economic interests with their editorial line and an ambiguous participation of the public, which requires a better definition of their role within the information process. The conclusions derived from this analysis allow us to reflect on several aspects: among others, the competition in a deregulated market leads to infotainment and affects the quality of information, as well as the rights of people affected by the news. At the same time, the excess of information channels leads to greater disinformation, under the appearance of a spontaneous pluralism that is superfluous. Ethics, therefore, seems to be a necessary requirement to differentiate professional journalism from other inappropriate information channels and to guarantee the right to information of citizens.El presente artículo analiza las opiniones de los ciudadanos sobre los valores centrales de la denominada Media Accountability: veracidad, independencia, transparencia, participación del público y respeto a los derechos de las personas. Asimismo, se estudia la percepción de la ciudadanía hacia diversos instrumentos deontológicos para medir la eficacia del cumplimiento de dichos valores éticos. La metodología cualitativa empleada para realizar este análisis, enmarcado en el proyecto I+D+i “Accountability y Culturas Periodísticas en España. Impacto y propuesta de buenas prácticas en los medios de comunicación españoles” (MediaACES), se ha concretado mediante la realización de seis grupos de discusión (focus groups) en diversas ciudades del territorio español. Los resultados reflejan el espíritu crítico de la ciudadanía hacia los medios de comunicación por los siguientes factores: la ausencia de objetividad, la mezcla de intereses económicos con su línea editorial y una ambigua participación del público, que exige definir mejor su rol dentro del proceso informativo. Las conclusiones permiten reflexionar sobre diversos aspectos, entre otros, que la competencia en un mercado desregularizado conduce al infoespectáculo y afecta a la calidad informativa y los derechos de las personas afectadas por las noticias. Asimismo, el exceso de canales de información conduce a una mayor desinformación, bajo la apariencia de un pluralismo espontáneo que resulta superfluo. La ética, por tanto, se antoja como una exigencia necesaria para distinguir el periodismo profesional de otras opciones informativas impropias y garantizar el derecho a la información de los ciudadanos