A systematic construction of completely integrable Hamiltonians from coalgebras

A universal algorithm to construct N-particle (classical and quantum) completely integrable Hamiltonian systems from representations of coalgebras with Casimir element is presented. In particular, this construction shows that quantum deformations can be interpreted as generating structures for integrable deformations of Hamiltonian systems with coalgebra symmetry. In order to illustrate this general method, the $so(2,1)$ algebra and the oscillator algebra $h_4$ are used to derive new classical integrable systems including a generalization of Gaudin-Calogero systems and oscillator chains. Quantum deformations are then used to obtain some explicit integrable deformations of the previous long-range interacting systems and a (non-coboundary) deformation of the $(1+1)$ Poincar\'e algebra is shown to provide a new Ruijsenaars-Schneider-like Hamiltonian.Comment: 26 pages, LaTe

Estudio comparativo de la carrera académica del profesorado en las universidades públicas politécnicas españolas desde una perspectiva de género

La Ley Orgánica 3/2007, de 22 de Marzo1, para la Igualdad efectiva de Mujeres y Hombres, define los planes de igualdad como un conjunto ordenado de medidas adoptadas después de realizar un diagnóstico de situación, tendentes a alcanzar en la empresa la igualdad de trato y de oportunidades entre mujeres y hombres y a eliminar la discriminación por razón de sexo. Posteriormente, en la Resolución de 20 de Mayo de 2011, de la Secretaría de Estado para la Función Pública, se publica el Acuerdo del Consejo de Ministros de 28 de Enero de 2011, por el que se aprueba el I Plan de Igualdad entre mujeres y hombres en la Administración General del Estado y en sus Organismos Públicos2. La Universitat Politècnica de Catalunya (UPCBARCELONATECH), conocedora de los diferentes estudios y análisis nacionales e internacionales que se han llevado a cabo sobre la carrera académica de las mujeres en las universidades, así como de la próxima publicación de un Libro Blanco sobre las diferencias de género en ciencia y tecnología del MICINN [SÁNCHEZ, 2011], desea documentar dichas diferencias en las universidades públicas politécnicas españolas (UPC, UPM, UPV y UPCT) y proporcionar recomendaciones para conseguir minimizarlas. Se analizarán las carreras académicas según sexo, edad, ramas de conocimiento y situación familiar

Factors influencing the charge distribution on PdxPty bimetallic nanoparticles

AbstractWe performed quantum mechanics calculations to elucidate the electronic behavior of Pd-Pt bimetallic nanoparticles, using density functional theory, in response to particle size and stoichiometric composition. Using neutrally charged nanoparticles and the Bader charge analysis, we found that external Pd atoms were positively charged, which agrees with previous XPS observations of supported Pd-Pt nanoparticles. From the calculations, unsupported nanoparticles exhibit an electron transfer from Pd to Pt. This result supports the idea that Pd electron-deficient species are possibly responsible of the hydrogenating function of these catalysts, in the hydrodesulfurization of dibenzothiophene. Additionally, it was found that the particle size does not affect the electronic charge distribution and the stoichiometric composition is the factor that greatly influences this property in nanoparticles.Keywords: Pd-Pt nanoparticles, Bader charge analysis, DFT, bimetallic clusters.Factores que influyen en la distribución de carga en nanopartículas bimetálicas de PdxPtyResumenSe llevó a cabo la simulación del comportamiento electrónico de nanopartículas bimetálicas de Pd-Pt mediante cálculos mecanocuánticos, utilizando la teoría del funcional de densidad, con el fin de predecir la influencia en dicho comportamiento, de factores como el tamaño y la composición estequiométrica de la nanopartícula. Al considerar nanopartículas con carga neutra, se encontró, mediante el análisis de cargas de Bader que los átomos externos de Pd presentan una carga positiva, lo cual concuerda con análisis experimentales mediante XPS de catalizadores de Pd-Pt soportados. De las simulaciones, se encontró que las nanopartículas exhiben una transferencia de carga del Pd al Pt. Este resultado da crédito a la idea que especies electrodeficientes de Pd son las responsables de la función hidrogenante, de estos catalizadores, en la hidrodesulfuración del dibenzotiofeno. También se encontró que la influencia del tamaño de la nanopartícula no afecta la distribución electrónica, y que la composición estequiométrica es el factor que más influye en dicha propiedad de las nanopartículas.Palabras clave: nanopartículas Pd-Pt, análisis de cargas de Bader, DFT, clusters bimetálicos

Updating the Master Management Plan for El Cachucho MPA (Cantabrian Sea) using a spatial planning approach

Located in the Cantabrian Sea (NE Atlantic), 30 nm off the Asturian coast, “El Cachucho” was the first off-shore Marine Protected Area (MPA) to be declared in Spain. The area includes Le Danois Bank and its intraslope basin. It joined the OSPAR Network of MPAs in 2009 and, thereafter, was included in the Natura 2000 Network in 2011. The main reason for its declaration as MPA was the presence of the 1170 Reefs habitat included in Annex I of the EU Habitats Directive. In 2018, the MPAs Master Management Plan was under revision and its design criteria were subjected to evaluation. We used Marxan decision support tool to evaluate the MPA's management design criteria. This tool selects the most important conservation features, while minimizing the socioeconomic cost. First, the 1170 Reefs habitat was defined as the main environmental value. Specifically, we took into account the six large sized target species that are more representative of this habitat in the area: the sponges Asconema setubalense, Geodia cf. barretti and Phakellia robusta, the anthipatarian Leiopathes glaberrima, and the gorgonians Placogorgia sp. and Callogorgia verticillata. A spatial distribution map was produced for each species using Generalized Additive Models (GAM). We also considered the presence of spawning stocks of fish species which are present in the area as an important conservation value. Their spatial distribution was modeled through Maxent software. Additionally, for the socioeconomic cost, fishing effort of the different fisheries operating in the area was estimated linking VMS/Logbook data before and after the MPA was declared. The first results obtained with the Marxan tool were presented in public consultation, in the context of the LIFE + INTEMARES Project, to help in decision making within the new Management Plan. Thus, to improve the management measures aimed at the conservation of the environmental values of the MPA, an enlargement of the protected area to the West was proposed, and a more reasonable use of the buffer area to fishermen than that defined in the former Management Plan was suggested. Involving all stakeholders in the development of the management plan for this MPA is a decisive step for the creation and consolidation of an important network of MPAs in Spain.En prensa2,08

Underwater noise studies in the Gulf of Lions region. Anthropogenic contributions to underwater noise due to maritime traffic and offshore windfarm operation

En el marco del proyecto MSPMED se ha llevado a cabo un caso de estudio transfronterizo entre España y Francia en relación al estado de los ecosistemas, el desarrollo de la eólica marina y el ruido submarino,. Este deliverable analiza cómo podría ser el impacto del ruido submarino producido por el tráfico marítimo y la eólica marina en el componente pelágico

An annotated and updated checklist of the ophsthobranchs ((Mollusca: Gastropoda) from Spain and Portugal (including islands and archipelagos)

The present publication is a new annotated and updated checklist of the opisthobranchs (Mollusca, Gastropoda) from the Spanish and Portuguese coasts, including their Atlantic archipelagos (Azores, Madeira, Selvagens and Canary Islands). The bathyal species recorded from the continental shelf of all these areas are also included. Incorporating a review of the literature, 523 species are included on the present checklist, 23 belonging to Architectibranchia, 111 to Cephalaspidea s. s., 14 to Anaspidea, 4 to Acochlidiomorpha, 37 to Thecosomata, 7 to Gymnosomata, 43 to Sacoglossa, 3 to Umbraculoidea, 16 to Pleurobranchoidea and 265 to Nudibranchia: 127 Doridoidea, 42 Dendronotoidea, 9 Arminoidea, and 87 Aeolidoidea. The records these species have been divided into 12 geographic sectors: 1) Spanish coast on the Bay of Biscay; 2) Galicia; 3) mainland coast of Portugal; 4) Andalusian Atlantic coast; 5) Straits of Gibraltar, including Ceuta (northern Africa); 6) Andalusian Mediterranean coast, ..

MSP Plans in MSPMED; main facts

El objetivo de este informe es la creación de fichas comparativas de los planes nacionales de ordenación del espacio marítimo de los países socios de MSPMED con el fin de detectar los puntos comunes y las principales diferencias entre ellos

Tidal foces as a regulator of star formation in Taurus

Only a few molecular clouds in the Solar Neighborhood exhibit the formation of only low-mass stars. Traditionally, these clouds have been assumed to be supported against more vigorous collapse by magnetic fields. The existence of strong magnetic fields in molecular clouds, however, poses serious problems for the formation of stars and of the clouds themselves. In this {\em Letter}, we review the three-dimensional structure and kinematics of Taurus --the archetype of a region forming only low-mass stars-- as well as its orientation within the Milky way. We conclude that the particularly low star-formation efficiency in Taurus may naturally be explained by tidal forces from the Galaxy, with no need for magnetic regulation or stellar feedback.Comment: Minor changes. 5 pages. Accepted by MNRA