The troubling legal and political uncertainty facing Catalonia

There is still no end in sight to the political uncertainty in Catalonia. As Javier García Oliva writes, the issue has raised questions over processes of constitutional reform in Spain. He highlights that constitutional systems tend to make amendments difficult precisely to avoid short-term political winds driving the state in directions which may be damaging to minority interests. But while constitutions should not be carried away by every political tide and current, where there is a tidal wave of opinion, they need to move and accommodate or they risk being swept away

Implementación de un Sistema RV Multiusuario en la División de Estudios para Graduados de la Facultad de Arquitectura y Diseño de la Universidad del Zulia

The present article describes the implementation of a VR multi-user system, in the computer laboratories of the Graduate School of Architecture and Design in the University of Zulia, Maracaibo, Venezuela, and the technical and operational features that have to be considered in this kind of project.El presente artículo describe la implementación de un sistema RV Multiusuario en los laboratorios de computación del Postgrado de la Facultad de Arquitectura y Diseño de la Universidad del Zulia, Maracaibo, Venezuela, y las consideraciones de tipo técnico y operativo que este proyecto implica para su uso con fines académicos

La utilización del modelo integrado de enseñanza en la iniciación deportiva: limitaciones desde la atención y la memoria.

La enseñanza del deporte en los niveles iniciales ha supuesto cambios notables en su planteamiento. Aunque todavía no hay suficientes trabajos experimentales para que se puedan extraer conclusiones definitivas, desde parcelas de estudio como la atención y la memoria se puede afirmar que los modelos cognitivos en la enseñanza del deporte ofrecen más garantías. En este trabajo intentamos demostrar que una aplicación del modelo integrado de técnica y táctica permite aplicar diferentes resultados que se han comprobado en las limitaciones atencionales y memorísticas para el aprendizaje de la táctica y técnica deportiva en los niveles iniciales de los deportes

A Visualization of Null Geodesics for the Bonnor Massive Dipole

In this work we simulate null geodesics for the Bonnor massive dipole metric by implementing a symbolic-numerical algorithm in Sage and Python. This program is also capable of visualizing in 3D, in principle, the geodesics for any given metric. Geodesics are launched from a common point, collectively forming a cone of light beams, simulating a solid-angle section of a point source in front of a massive object with a magnetic field. Parallel light beams also were considered, and their bending due to the curvature of the space-time was simulated.Comment: 9 pages, 5 figures, Presented at XIX Simposio Internacional de M\'etodos Matem\'aticos Aplicados a las Ciencias (19th International Symposium of Mathematical Methods Applied to Sciences, XIX-SIMMAC

Dynamic analysis of road vehicle-bridge systems under turbulent wind by means of Finite Element Models

When an automobile passes over a bridge dynamic effects are produced in vehicle and structure. In addition, the bridge itself moves when exposed to the wind inducing dynamic effects on the vehicle that have to be considered. The main objective of this work is to understand the influence of the different parameters concerning the vehicle, the bridge, the road roughness or the wind in the comfort and safety of the vehicles when crossing bridges. Non linear finite element models are used for structures and multibody dynamic models are employed for vehicles. The interaction between the vehicle and the bridge is considered by contact methods. Road roughness is described by the power spectral density (PSD) proposed by the ISO 8608. To consider that the profiles under right and left wheels are different but not independent, the hypotheses of homogeneity and isotropy are assumed. To generate the wind velocity history along the road the Sandia method is employed. The global problem is solved by means of the finite element method. First the methodology for modelling the interaction is verified in a benchmark. Following, the case of a vehicle running along a rigid road and subjected to the action of the turbulent wind is analyzed and the road roughness is incorporated in a following step. Finally the flexibility of the bridge is added to the model by making the vehicle run over the structure. The application of this methodology will allow to understand the influence of the different parameters in the comfort and safety of road vehicles crossing wind exposed bridges. Those results will help to recommend measures to make the traffic over bridges more reliable without affecting the structural integrity of the viaduc

Towards a goal-oriented agent-based simulation framework for high-performance computing

Currently, agent-based simulation frameworks force the user to choose between simulations involving a large number of agents (at the expense of limited agent reasoning capability) or simulations including agents with increased reasoning capabilities (at the expense of a limited number of agents per simulation). This paper describes a first attempt at putting goal-oriented agents into large agentbased (micro-)simulations. We discuss a model for goal-oriented agents in HighPerformance Computing (HPC) and then briefly discuss its implementation in PyCOMPSs (a library that eases the parallelisation of tasks) to build such a platform that benefits from a large number of agents with the capacity to execute complex cognitive agents.Peer ReviewedPostprint (author's final draft

REST Web Services in Collaborative Work Environments

This paper presents a case study for the development of an integration framework in the area of collaborative work environments. This framework is based on REST Web services, and has been designed and implemented as part of the Laboranova European project.Peer ReviewedPreprin