What do you prefer for a relaxing time at home: reading, watching TV or listening to the radio?

This article studies the determinants of time spent by Spanish consumers on reading, watching TV and listening to the radio. To that end, we estimate a SUR (seemingly unrelated regressions) model with data from the Spanish Time Use Survey for 2009–2010. Our results show that being self-employed has a negative and significant effect on the time dedicated to reading and to watching TV; older individuals spend more time reading, and being male influences the time spent watching TV and listening to the radio, all in a statistically significant and positive way. Additionally, those with a higher level of education spend more time reading, while those with lower levels of education prefer to watch TV. Adults with better health spend less time on both reading and watching TV, and families with larger numbers of children up to age 5 tend to spend less time on all three of our at-home leisure activities. Finally, living in a larger city has a positive effect on the time dedicated to all three options

Redes bayesianas para identificar perfiles de estudiante. Aplicación al estudio del abandono de las titulaciones de Informática en la Universidad de Castilla-La Mancha

El abandono de los estudiantes es un problema que afecta a todas las universidades siendo más acusado en las titulaciones de las ramas de Ingeniería y Arquitectura. Como docentes del Grado de Ingeniería Informática de la Universidad de Castilla-La Mancha nuestro interés se centra en analizar el perfil del estudiante que abandona estos estudios, con el fin de definir acciones orientadas a reducir la actual tasa de abandono. En ediciones anteriores de las JENUI se ha analizado esta problemática desde el punto de vista de la estadística tradicional y de la minería de datos, mediante árboles de decisión y regresión multivariante; en este trabajo lo abordamos mediante algoritmos de aprendizaje de redes bayesianas, ya que éstas tienen una semántica muy rica y son fácilmente interpretables. Los resultados del trabajo no son concluyentes debido a las restricciones de la base de datos utilizada, pero la descripción del estudio realizado pone en valor el interés de la técnica empleada y sienta las bases para mejorar el alcance de la investigación en trabajos futuros relacionados con la extración de datos de futuros estudiantes

Non-Structural Masonry Walls Strengthened With Gfrp Laminates

One of the major construction systems in Colombia, and in general throughout Latin America, consists of multistory moment resisting reinforced concrete (RC) frames filled with unreinforced masonry (URM) walls. These non-structural masonry walls are conventionally built using clay tiles. Due to the high seismic activity in Colombia, this kind of masonry wall is prone to damage. One of the alternatives being explored in Colombia to prevent the failure or lessen the damages in clay tile URM walls is to strengthen them with Glass Fiber Reinforced Polymer (GFRP) laminates. This paper presents promising results of experimental tests conducted on twenty-six wallettes of 9x70x70 cm and 9x120x120 cm, which were strengthened with different layouts of GFRP laminates. In addition, a full-scale wall was tested to validate the technology. The paper discusses the effect of GFRP laminates on the failure mechanisms, capacity and ductility parameters as well as on the overall reduction of earthquake damage for clay tile URM walls

Mid-infrared Suspended Waveguide Platform and Building Blocks

In this work we present our recent progress in the development of a platform for the mid-infrared wavelength range, based on suspended silicon waveguide with subwavelength metamaterial cladding. The platform has some intrinsic advantages, which make it a very promising candidate for sensing applications in the fingerprint region. Specifically, it can cover the full transparency window of silicon (up to a wavelength of 8 μm), only requires one lithographic etch-step and can be designed for strong light-matter interaction. Design rules, practical aspects of the fabrication process and experimental results of a complete set of elemental building blocks operating at two very different wavelengths, 3.8 μm and 7.67 μm, will be discussed. Propagation losses as low as 0.82 dB/cm at λo=3.8 μm and 3.1 dB/cm at λo=7.67 μm are attained, for the interconnecting waveguides.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Properties of Portland Cement Mortar with Substitutions of Natural and Expanded Perlite

The present research deals with the feasibility of using high-temperature pozzolans such as Natural Perlite (NP) and Expanded Perlite (EP), different dosagues of additions were made to mortars in order to perform their mechanical properties. Mortars were subjected to destructive tests in hardened state: compression, tension, flexion and adhesion strength; as well as non-destructive tests in hardened state: ultrasonic pulse velocity (UPV), electrical resistivity (ER), density (ρ) and total porosity (PT); in addition to attack by sodium sulfate at 90 days. The percentages of the substitutions were 5%, 10%, 15%, 20% and 30% by weight of Portland cement mass (PC) relative to a control mortar (cement-sand-water). With the partial replacement of the cement and according to the tests carried out, it can be observed that the problem of durability and CO2 emissions is significantly reduced and, consequently, an energy saving and a lower environmental impact are promoted

Validez del dispositivo inercial WIMU PRO para el registro de la frecuencia cardiaca en un test de campo

Introduction. Technological advances have contributed to improve physiological and kinematical data collection in training sessions and competition matches. Inertial devices as WIMU PROTM (RealTrack Systems, Almeria, Spain) composed by different sensors (four accelerometers, two gyroscopes, a magnetometer, a GNSS chip to global tracking through satellite triangulation, a UWB chip to indoor sports tracking, Ant+ and Bluetooth receivers, among others) is used in different sports situations. It is important to know the validity and precision of measurement data because it is used in real game contexts. Objective. Evaluate inertial unit WIMU PROTM validity to collect heart rate (HR) data in relation to validated device Polar Team 2®. Participants. 15 under-16 football players participated voluntarily in this research (age: 15,40 ± 0,50 years, height: 169,26 ± 0,08 cm, weight: 62,00 ± 12,32 kg). Procedure. Football players performed RSA test (adapted from Bangsbo 2008) composed of 7 sprints of 30 meters with 20 seconds active recovery between sprints, which simulated the real demands of football matches. Results. It was found and very strong correlation between WIMU PROTM and Polar Team 2® data (r2=.958, p<.001). Conclusions. WIMU PROTMinertial device is valid to register heart rate data in football.Los avances tecnológicos han contribuido a la mejora de la colección de datos fisiológicos y cinemáticos con relación a la competición y los entrenamientos. Dispositivos inerciales tales como WIMUPROTM (RealTrack Systems, Almería, España) compuesto por diferentes sensores (cuatro acelerómetros, dos giróscopos, un magnetómetro, un chip GNSS para posicionamiento global mediante satélite, un chip UWB para posicionamiento por radiofrecuencia de onda corta en deportes indoor, receptor de Ant+ y Bluetooth, entre otros)se utilizan dentro de una variedad de situaciones deportivas.  Es importante conocer la validez y precisión del dato de dichas mediciones ya que se utilizan en contextos reales del juego. Objetivo. Evaluar la validez del dispositivo inercial WIMU PROTM para registrar la variable frecuencia cardiaca (FC) en relación con un dispositivo validado como es Polar Team 2®.Participantes. 15 jugadores de fútbol de categoría cadete participaron voluntariamente en este estudio(edad:15,40 ± 0,50 años, altura:169,26 ± 0,08 cm, peso:62,00 ± 12,32 kg). Procedimiento. Los individuos que componen la muestra llevaron a cabo el test RSA (adaptado de Bangsbo 2008) el cual consta de 7 sprints de 30 metros con una recuperación activa entre ellos de 20 segundos, el cual simula las exigencias reales de competición en fútbol. Resultados.Se encontró una correlación muy alta entre los datos obtenidos por el registro del dispositivo WIMU PROTM y los realizados por el dispositivo Polar Team 2® (r2=.958, p<.001). Conclusiones. El dispositivo inercial WIMU PROTMes válido para registrar la variable de intensidad de actividad física frecuencia cardiaca en fútbol

Modelo de integración de componentes metodológicos dentro del contexto de CIAF

Este trabajo presenta un modelo de integración de componentes metodológicos dentro del contexto del “Marco de Desarrollo de Sistemas Groupware Interactivos (CIAF: Collaborative Interactive Application Framework)”. Como caso de estudio se realiza la integración de dos propuestas enmarcadas en el desarrollo de sistemas interactivos, la primera, TD-MBUID (Task & Data Model Based User Interface Development), enfocada en el desarrollo de la interfaz de usuario y la segunda, MPIu+a (Modelo de Proceso de la Ingeniería de la Usabilidad y la Accesibilidad),en la evaluación de la usabilidad

Integration model of methodological components within the CIAF context

Este trabajo presenta un modelo de integración de componentes metodológicos dentro del contexto del “Marco de Desarrollo de Sistemas Groupware Interactivos (CIAF: Collaborative Interactive Application Framework)”. Como caso de estudio se realiza la integración de dos propuestas enmarcadas en el desarrollo de sistemas interactivos, la primera, TD-MBUID (Task & Data Model Based User Interface Development), enfocada en el desarrollo de la interfaz de usuario y la segunda, MPIu+a (Modelo de Proceso de la Ingeniería de la Usabilidad y la Accesibilidad),en la evaluación de la usabilidad.This paper presents a methodology for integrating methodological components, based on the "Framework for Interactive Groupware Systems Development (CIAF: Collaborative Interactive Application Framework)." As a case study, the integration of two proposals under development of interactive systems is performed, the first, TD-MBUID (Task & Data Model Based User Interface Development), focused on the development of the user interface and the second, MPIu+a (Modelo de Proceso de la Ingeniería de la Usabilidad y la Accesibilidad), in the usability evaluation

Physical fitness and white matter microstructure in children with overweight or obesity: the ActiveBrains project

Recent studies investigated the association of cardiorespiratory fitness with white matter microstructure in children, yet little work has explored to what extent other components of physical fitness (i.e., muscular or motor fitness) are associated with white matter microstructure. Indeed, this association has not been previously explored in children with overweight/obesity who present a different white matter development. Therefore, we aimed to examine associations between physical fitness components and white matter microstructure in children with overweight/obesity. In total, 104 (10.04 +/- 1.15 years old; 43 girls) children were included in this cross-sectional study. Physical fitness was assessed using the ALPHA-fitness test battery. Fractional anisotropy (FA) and mean diffusivity were derived from diffusion tensor imaging (DTI). No association was found between physical fitness and global DTI metrics (all P>0.082). Within individual tracts, all associations became non-significant when analyses were adjusted for multiple comparisons. Using the voxel-wise approach, we identified a small cluster in the left lateral frontal lobe where children with greater upper-body muscular fitness showed higher FA (PFWE-corrected=0.042). Although our results cannot conclude physical fitness is related to white matter microstructure in children with overweight/obesity; those findings indicate that the association of muscular fitness with white matter microstructure might be more focal on frontal areas of the brain, as opposed to global differences