Suppression of Lepton Flavour Violation from Quantum Corrections above MGUTM_{GUT}

We study the predictions for sfermion masses and Lepton Flavour Violation (LFV) for the WMAP preferred parameter space in $b-\tau$ Yukawa-unified models with massive neutrinos. A soft term structure as predicted by an Abelian flavour symmetry combined with SU(5) RGEs for scales above $M_{GUT}$, results to an efficient suppression of the off-diagonal terms in the scalar soft matrices, particularly for $m_0< 100$ GeV. Using the WMAP bounds, this implies $35\le\tan\beta \le 45$, $350\,\mathrm{GeV}\le m_{1/2}\le 1\,\mathrm{TeV}$, with the higher $\tan\beta$ values being favored. Within this framework, SU(5) unification becomes compatible with the current experimental bounds, in contrast to the conventional case where the soft terms are postulated at the GUT scale.Comment: 15 pages, 5 figs

Gravity or turbulence? -III. Evidence of pure thermal Jeans fragmentation at ~0.1 pc scale

We combine previously published interferometric and single-dish data of relatively nearby massive dense cores that are actively forming stars to test whether their `fragmentation level' is controlled by turbulent or thermal support. We find no clear correlation between the fragmentation level and velocity dispersion, nor between the observed number of fragments and the number of fragments expected when the gravitationally unstable mass is calculated including various prescriptions for `turbulent support'. On the other hand, the best correlation is found for the case of pure thermal Jeans fragmentation, for which we infer a core formation efficiency around 13 per cent, consistent with previous works. We conclude that the dominant factor determining the fragmentation level of star-forming massive dense cores at 0.1 pc scale seems to be thermal Jeans fragmentation.Comment: accepted in MNRA

Dise?o del complejo eco tur?stico "La Holgazana" el Espinal, vereda la Caimanera

153 p. Recurso Electr?nicoEl trabajo de grado ?Dise?o del complejo eco tur?stico ?La Holgazana?, en la vereda la Caimanera, Espinal, Tolima?; es la respuesta a las insuficiencias del municipio aportando a la creaci?n de empleo, as? mejorando la econom?a del lugar; la preservaci?n del rio magdalena y sus alrededores en el punto del Malec?n de la Caimanera, importantes para el desarrollo tur?stico y medio ambiental ; finalmente el rescate de las tradiciones por medio de espacios dedicados a recordar la memoria de la cultura de la regi?n. Se estudi? la poblaci?n del Espinal desde los diferentes ?mbitos, logrando como resultado una lista de necesidades y cualidades del municipio, por medio de encuestas, entrevistas y an?lisis de planes del lugar. En conclusi?n el complejo eco tur?stico se plante? bajo el concepto de la Identidad, destacando las costumbres y pr?cticas Espinalunas, desarrollando desde todas las perspectivas la condici?n del ?eco? cumpliendo cada uno de los objetivos propuestos.The work of project "Design of the ecotourism complex" La Holgazana ", in the Caimanera town, Espinal, Tolima"; Is the answer to the inadequacies of the borough, contributing to the creation of employment, thus improving the economy of the place; the preservation of the Magdalena River and its surroundings at the point of the Caimanera?s pier. This is important for tourism and environmental development. Finally, it contributes to the rescue of the traditions by means of spaces dedicated to remember the memory of the culture of the region. The Espinal?s people was studied from different scopes. The result was a list of needs and qualities of the township, through surveys, interviews and analysis of local plans. In conclusion, the eco-tourism complex was raised under the concept of Identity, highlighting the customs and Espinal?s practices, developing from all perspectives of the ?eco? fulfilling each of the goals proposed. Keywords: Ecotourism, Identity, Customs, Traditions, Culture

The motion of the 2D hydrodynamic Chaplygin sleigh in the presence of circulation

We consider the motion of a planar rigid body in a potential flow with circulation and subject to a certain nonholonomic constraint. This model is related to the design of underwater vehicles. The equations of motion admit a reduction to a 2-dimensional nonlinear system, which is integrated explicitly. We show that the reduced system comprises both asymptotic and periodic dynamics separated by a critical value of the energy, and give a complete classification of types of the motion. Then we describe the whole variety of the trajectories of the body on the plane.Comment: 25 pages, 7 figures. This article uses some introductory material from arXiv:1109.321

¿Agroecología en la España despoblada?

Después de reflexionar sobre las dinámicas complementarias de creciente concentración de la población en ciudades y despoblación rural, se describe el caso de la iniciativa Activa Valverde. Un grupo de vecinos ha creado en este pequeño pueblo de Extremadura una plataforma ciudadana para afrontar la posible desaparición de la localidad, para lo que ha establecido fuertes vínculos con la Universidad de Sevilla. La descripción de los actores implicados, las acciones y los resultados preliminares de la iniciativa son parte de los resultados preliminares del proceso.In this paper we reflect on the complementary demographic dynamics with population increasingly concentrating in cities and rural depopulation. Afterwards we describe the Activa Valverde initiative, in which a group of neighbors has created a citizen platform to face the possible disappearance of this little town in Extremadura. They have established strong links with the University of Seville. We present a description of the actors involved, the actions and the preliminary results of the initiative

Decaying lava extrusion rate at El Reventador Volcano, Ecuador measured using high-resolution satellite radar

Lava extrusion at erupting volcanoes causes rapid changes in topography and morphology on the order of tens or even hundreds of metres. Satellite radar provides a method for measuring changes in topographic height over a given time period to an accuracy of metres, either by measuring the width of radar shadow cast by steep sided features, or by measuring the difference in radar phase between two sensors separated in space. We measure height changes, and hence estimate extruded lava volume flux, at El Reventador, Ecuador between 2011 and 2016, using data from the Radarsat-2 and TanDEM-X satellite missions. We find 39 new lava flows were extruded between 9 February 2012 and 24 August 2016, with a cumulative volume of 44.8M m3 dense rock equivalent and a gradually decreasing eruption rate. The average dense rock rate of lava extrusion during this time is 0.31 ± 0.02 m3s−1, which is similar to the long term average from 1972 to 2016. Apart from a volumetrically small dyke opening event between 9 March and 10 June 2012, lava extrusion at El Reventador is not accompanied by any significant magmatic ground deformation. We use a simple physics-based model to estimate that the volume of the magma reservoir under El Reventador is greater than 3 km3. Our lava extrusion data can be equally well fit by models representing a closed reservoir depressurising during the eruption with no magma recharge, or an open reservoir with a time-constant magma recharge rate of up to 0.35 ± 0.01 m3s−

GRAVITY: getting to the event horizon of Sgr A*

We present the second-generation VLTI instrument GRAVITY, which currently is in the preliminary design phase. GRAVITY is specifically designed to observe highly relativistic motions of matter close to the event horizon of Sgr A*, the massive black hole at center of the Milky Way. We have identified the key design features needed to achieve this goal and present the resulting instrument concept. It includes an integrated optics, 4-telescope, dual feed beam combiner operated in a cryogenic vessel; near infrared wavefront sensing adaptive optics; fringe tracking on secondary sources within the field of view of the VLTI and a novel metrology concept. Simulations show that the planned design matches the scientific needs; in particular that 10 microarcsecond astrometry is feasible for a source with a magnitude of K=15 like Sgr A*, given the availability of suitable phase reference sources.Comment: 13 pages, 11 figures, to appear in the conference proceedings of SPIE Astronomical Instrumentation, 23-28 June 2008, Marseille, Franc

Caracterización de uniones material compuesto-hormigón mediante ensayos de pelado, cortadura, tracción plana y torsión

XI CONGRESO NACIONAL DE MATERIALES COMPUESTOS. Celebrado en Móstoles los días 6, 7 y 8 de julio de 2015El presente trabajo se centra en el análisis de diferentes ensayos que permiten determinar la calidad de la unión entre laminados de material compuesto y hormigón. Los ensayos considerados han sido: Pull Off (ensayo a tracción), Shear Torsion (ensayo de torsión), Lap Shear (ensayo de cortadura) y Lap Peeling (ensayo de pelado). La fabricación de las probetas se ha llevado a cabo siguiendo tres procedimientos: por apilado e impregnación manual del material compuesto sobre el hormigón, mediante pegado de laminados de material compuesto prefabricados y mediante impregnación insitu del material compuesto sobre el hormigón a través de técnicas de infusión de resina líquida. Además, dichos ensayos se han realizado sobre probetas de hormigón con dos tratamientos superficiales: amoladora y lija de grano grueso. Tras la realización de los ensayos se ha constatado que predomina la rotura por el hormigón sobre roturas adhesivas o cohesivas, lo que indica una buena adhesión entre éste y el material compuesto, para todos los métodos de fabricación de la unión y tratamientos superficiales del hormigónCentro para el Desarrollo Tecnológico e Industrial (CDTl) lTC-20131020Fondos Europeos de Desarrollo Regional (FEDER) lTC-2013102