Dinàmica poblacional de dos equinoïdeus irregulars de l’Aptià de Cinctorres (conca del Maestrat)

S’estudia la tafonomia i la comunitat d’un jaciment de l’Aptià de Cinctorres (Conca sedimentaria del Maestrat, Serralada Ibèrica). S’analitza la dinàmica poblacional d’Heteraster oblongus (Brongniart 1821) i Pliotoxaster collegnii (Sismonda 1843). Les conclusions més importants són que es tracta d’una paleobiocenosi, però presenta un biaix estratinòmic a favor d’espècies infàuniques en contra de les epifàuniques i un alter biaix fossildiagenètic a favor dels éssers amb conquilla composta de calcita davant els que tenen la closca d’aragonita. Que l’estudi de les poblacions permet constatar l’existència de dos equinoïdeus detritívors amb poblacions pròsperes explotant un mateix recurs alimentari. Population dynamics of two irregular echinoid of Aptian from Cinctorres (Maestrat Basin) The taphonomy and the fossil community of the one site from Aptian of the Cinctorres (sedimentary basin Maestrat, Iberian Chain) is studied. The population dynamics of Heteraster oblongus (Brongniart 1821) and Pliotoxaster collegnii (Sismondi 1843) are analysed. The most important conclusions is that this is a paleobiocenosis, but has a biostratinomic bias in favour of infaunal species against epifaunal and a diagenetic bias in favour of shells composed of calcite against the shell of aragonite. The study populations can confirm the existence of two detritivores equinoids with prosperous populations, exploiting the same food resource

Dolor abdominal crónico en la infancia : Hacia la consulta de alta resolución en Atención Primaria

El dolor abdominal crónico genera multitud de visitas tanto en Atención Primaria como en el hospital. El trabajo muestra cómo puede ser enfocado este proceso en la consulta de Atención Primaria. Nosotros planteamos pautas diagnósticas del dolor abdominal crónico mediante analítica y estudios de imagen individualizados según las indicaciones. Nuestro objetivo es iniciar el diagnóstico y el tratamiento del dolor abdominal crónico, convirtiendo la consulta de Atención Primaria en consulta de alta resolución para esta patología.Chronic abdominal pain causes constant visits of patients in primary and hospital care. This work shows how to approach this process in Primary Care. We show the diagnosis of abdominal pain in children with individualized laboratory testing and imagine studies according to indication. Our purpose is to begin the diagnosis and the management, changing Primary Care into a high resolution form of pediatric healthcare for this [email protected]

Distributed negotiation in future power networks : rapid prototyping using multi-agent system

Technologies like multi-agent system (MAS) have the capability to deal with future power grid requirements such as frequency management and voltage control under a flexible, intelligent and active feature. Based on web of cells (WoC) architecture proposed by European Liaison on Electricity Committed Towards longer-term Research Activity Integrated Research Programme (ELECTRA IRP), a distributed MAS with distributed negotiation ability for future distributed control (including frequency management and voltage control) is proposed. Each cell is designed as an intelligent agent and is investigated in case studies with constraints, where each agent can only communicate with its neighbouring agents. The interaction logic among agents is according to the distributed negotiation algorithm under consideration by the authors. Simulation results indicate that the WoC architecture could negotiate resources in a distributed manner and achieve successful exchange of resources by coordinating distributed agents. Moreover, the prototype reported in this paper can be extended further for future grids' distributed control regimes. The option of MAS to be exploited for the support of the development and integration of novel power system concepts is explored

Development of measurement-based load models for the dynamic simulation of distribution grids

The advent of new types of loads, such as power electronics and the increased penetration of low-inertia motors in the existing distribution grids alter the dynamic behavior of conventional power systems. Therefore, more accurate dynamic, aggregate, load models are required for the rigorous assessment of the stability limits of modern distribution networks. In this paper, a measurement-based, input/output, aggregate load model is proposed, suitable for dynamic simulations of distribution grids. The new model can simulate complex load dynamics by employing variable-order transfer functions. The minimum required model order is automatically determined through an iterative procedure. The applicability and accuracy of the proposed model are thoroughly evaluated under distinct loading conditions and network topologies using measurements acquired from a laboratory-scale test setup. Furthermore, the performance of the proposed model is compared against other conventional load models, using the mean absolute percentage error