188 research outputs found
Editorial on "Multiplex networks: Structure, dynamics and applications"
There is a wide range of systems in the real world where components cannot function independently, so that these components interact with others through different channels of connectivity and dependencies. Complex Networks theory is, in fact, the formal tool for describing and analyzing fields as disparate as sociology (social networks, acquaintances or collaborations between individuals), biology (metabolic and protein networks, neural networks) or technology (phone call networks, computers in telecommunication networks
Guía orientadora para la preparación al nacimiento y crianza en Andalucía
Esta Guía orientadora para la Preparación al Nacimiento y Crianza que la Consejería de
Salud y Familias de la Junta de Andalucía pone en manos de los y las profesionales tiene
como fin profundizar en todos sus aspectos esenciales y así aumentar la calidad de
estas actividades de aprendizaje y promoción de la salud. Con este objetivo se ofrecen
en las páginas siguientes propuestas de actualización pedagógica y científica, de forma
que sea posible realizar una docencia innovadora y atenta a las necesidades reales de
las usuarias y usuarios del SSPA
Community Structure in Soil Porous System
Diffusion controls the gaseous transport process in soils when advective transport is almost null. Knowledge of the soil structure and pore connectivity are critical issues to understand and modelling soil aeration, sequestration or emission of greenhouse gasses, volatilization of volatile organic chemicals among other phenomena. In the last decades these issues increased our attention as scientist have realize that soil is one of the most complex materials on the earth, within which many biological, physical and chemical processes that support life and affect climate change take place. A quantitative and explicit characterization of soil structure is difficult because of the complexity of the pore space. This is the main reason why most theoretical approaches to soil porosity are idealizations to simplify this system. In this work, we proposed a more realistic attempt to capture the complexity of the system developing a model that considers the size and location of pores in order to relate them into a network. In the model we interpret porous soils as heterogeneous networks where pores are represented by nodes, characterized by their size and spatial location, and the links representing flows between them. In this work we perform an analysis of the community structure of porous media of soils represented as networks. For different real soils samples, modelled as heterogeneous complex networks, spatial communities of pores have been detected depending on the values of the parameters of the porous soil model used. These types of models are named as Heterogeneous Preferential Attachment (HPA). Developing an exhaustive analysis of the model, analytical solutions are obtained for the degree densities and degree distribution of the pore networks generated by the model in the thermodynamic limit and shown that the networks exhibit similar properties to those observed in other complex networks. With the aim to study in more detail topological properties of these networks, the presence of soil pore community structures is studied. The detection of communities of pores, as groups densely connected with only sparser connections between groups, could contribute to understand the mechanisms of the diffusion phenomena in soils
Coordination between cell proliferation and apoptosis after DNA damage in Drosophila
Exposure to genotoxic stress promotes cell cycle arrest and DNA repair or apoptosis. These “life” or “death” cell fate decisions often rely on the activity of the tumor suppressor gene p53. Therefore, the precise regulation of p53 is essential to maintain tissue homeostasis and to prevent cancer development. However, how cell cycle progression has an impact on p53 cell fate decision-making is mostly unknown. In this work, we demonstrate that Drosophila p53 proapoptotic activity can be impacted by the G2/M kinase Cdk1. We find that cell cycle arrested or endocycle-induced cells are refractory to ionizing radiation-induced apoptosis. We show that p53 binding to the regulatory elements of the proapoptotic genes and its ability to activate their expression is compromised in experimentally arrested cells. Our results indicate that p53 genetically and physically interacts with Cdk1 and that p53 proapoptotic role is regulated by the cell cycle status of the cell. We propose a model in which cell cycle progression and p53 proapoptotic activity are molecularly connected to coordinate the appropriate response after DNA damag
Multiscaling of soils as heterogeneous complex networks
In this paper we present a complex network model based on a heterogeneous preferential attachment scheme to quantify the structure of porous soils. Under this perspective pores are represented by nodes and the space for the flow of fluids between them is represented by links. Pore properties such as position and size are described by fixed states in a metric space, while an affinity function is introduced to bias the attachment probabilities of links according to these properties. We perform an analytical study of the degree distributions in the soil model and show that under reasonable conditions all the model variants yield a multiscaling behavior in the connectivity degrees, leaving a empirically testable signature of heterogeneity in the topology of pore networks. We also show that the power-law scaling in the degree distribution is a robust trait of the soil model and analyze the influence of the parameters on the scaling exponents. We perform a numerical analysis of the soil model for a combination of parameters corresponding to empirical samples with different properties, and show that the simulation results exhibit a good agreement with the analytical predictions
Necesidades de formación de maestros de infantil y primaria en atención a la diversidad
En este estudio se investiga la opinión del profesorado sobre la importancia que concede a la formación docente en atención a la diversidad y sobre el grado en el que desearía contar con una mejor formación en atención a la diversidad. MÉTODO. Se cuenta con una muestra incidental de 181 docentes de educación infantil y primaria (44 son hombres y 137 mujeres) con una edad media de 38,78 (DT= 8.97). Mediante una escala diseñada ad hoc (ENFAD) se evaluó, por un lado, la importancia concedida a diferentes temas de formación sobre atención a la diversidad, y, por otro, el grado de necesidad de formación percibida sobre cada uno de estos temas. También se evaluó el nivel de inteligencia emocional (IE) del profesorado mediante el cuestionario TEIQue-SF. RESULTADOS. Los docentes consideraron de alta importancia todos los temas de formación en atención a la diversidad y reconocieron una moderada necesidad de formación en los mismos. Los docentes de primaria expresaron mayores valoraciones en necesidades de formación que los docentes de infantil. Los docentes con alta IE mostraron un mayor reconocimiento de la importancia de la formación en atención a la diversidad que sus colegas con niveles bajos de IE. DISCUSIÓN. Este estudio replica parcialmente otros previos con muestra a nivel nacional, al tiempo que extiende la investigación al explorar por primera vez las relaciones entre la IE del profesorado y su valoración de la importancia de la formación en atención a la diversidad y de sus necesidades de formación al respect
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