Discovery of arenig graptolites in the Rioseco Thrust-Sheet (Cantabrian 2one, N. of Spain)

[Resumen] En este trabajo se da a conocer el hallazgo de Azygograptus undulatus CHEN y XIA en un tramo pelítico-arenoso situado por encima de la Cuar,ita de Barrios s.str. dentro de la escama de Rioseco, que se equipara convencionalmente a la «serie de transición» de otras localidades asturianas. La especie mencionada permite atribuir al Arenig estos niveles, siendo la primera vez que se registra su presencia fuera de China.[Abstract] Graptolites have been collected for the first time from the «transitional beds» overlying the Barrios Formation (=.Armorican Quartzite) in a single locality of eastern Asturias (N. Spain), within the Cantabrian zone of the Hesperian Massif (fig. 1). The studied material pertains to a dichograptid species with singlestiped rhabdosome and distinctive prothecal folds (fig. 2). It has been identified and described as Azygograptus undulatus CHEN & XIA, constituting thus the first report of this species outside China

Pairs-Production of Higgs in Association with Bottom Quarks Pairs at e+e−e^+e^- Colliders

In a previous paper, we studied the Higgs pair production in the standard model with the reaction $e^{+}e^{-}\to t \bar t HH$. Based on this, we study the Higgs pair production via $e^{+}e^{-}\to b \bar b HH$. We evaluate the total cross section of $b\bar bHH$ and calculate the number total of events considering the complete set of Feynman diagrams at tree-level, and compare this process with the process $e^{+}e^{-}\to t \bar t HH$. The numerical computation is done for the energy which is expected to be available at a possible Next Linear $e^{+}e^{-}$ Collider with a center-of-mass energy $800, 1000, 1600$ $GeV$ and luminosity 1000 $fb^{-1}$.Comment: 12 pages, 6 figure

Functional centrality in graphs

In this paper we introduce the functional centrality as a generalization of the subgraph centrality. We propose a general method for characterizing nodes in the graph according to the number of closed walks starting and ending at the node. Closed walks are appropriately weighted according to the topological features that we need to measure

Concurrent sampling: a view from the experience of the Spanish sampling programme

Working document presented at RCM NAIEO has been asked by RCM NA to provide an evaluation of the concurrent sampling carried out from 2009 following EU Data Collection Framework. Given that IEO has always applied the concurrent sampling on board (as part of the Discards Sampling Programme), the present document refers exclusively to the on-shore sampling. It has to be noted that some of these considerations were already presented to the Workshop on Implementation Studies on Concurrent Length Sampling (WKISCON2) as requested by ICES. So some figures are taken from the work developed there, based on the 2008-2014 data series provided by IEO. Considerations on quality issues (not addressed by WKISCON2) are presented as part of a case study focused on the Northern Spanish coastal small-scale gillnets fleet

Comprehensive review of vision-based fall detection systems

Vision-based fall detection systems have experienced fast development over the last years. To determine the course of its evolution and help new researchers, the main audience of this paper, a comprehensive revision of all published articles in the main scientific databases regarding this area during the last five years has been made. After a selection process, detailed in the Materials and Methods Section, eighty-one systems were thoroughly reviewed. Their characterization and classification techniques were analyzed and categorized. Their performance data were also studied, and comparisons were made to determine which classifying methods best work in this field. The evolution of artificial vision technology, very positively influenced by the incorporation of artificial neural networks, has allowed fall characterization to become more resistant to noise resultant from illumination phenomena or occlusion. The classification has also taken advantage of these networks, and the field starts using robots to make these systems mobile. However, datasets used to train them lack real-world data, raising doubts about their performances facing real elderly falls. In addition, there is no evidence of strong connections between the elderly and the communities of researchers

Comportamiento de las mujeres empresarias: una visión global

En los últimos decenios el número de empresas creadas o impulsadas por mujeres en todo el mundo ha experimentado un crecimiento importante. Ello ha favorecido la realización de diversos estudios sobre las diferencias existentes en las características y resultados de las empresas, así como en las actitudes y las estrategias empresariales adoptadas por los empresarios según su género. Desde esta perspectiva, en este trabajo se analizan las diferencias de géneros existentes en los comportamientos adoptados por los empresarios durante el desarrollo de las funciones empresariales, observándose que las diferencias encontradas en las características y cualidades de las mujeres empresarias en comparación con los varones van a afectar a los comportamientos empresariales adoptados por las mismas. Ello se ha relacionado con la diferente percepción por parte de las mujeres de los obstáculos y oportunidades existentes durante el desarrollo de la actividad empresarial, así como con sus motivaciones empresariales. ____________________________________________In recent decades the number of companies created or driven by women throughout the world has experienced significant growth. This has facilitated the implementation of various studies on the differences in the characteristics and performance of enterprises, as well as in attitude and business strategies adopted by entrepreneurs depending on their gender. This paper discusses gender differences in the behavior adopted by entrepreneurs for the development of enterprise functions. We have observed that the differences in the characteristics and qualities of women entrepreneurs compared with men affect the behaviour adopted by the former. This has been related to the different perception of every gender on the obstacles and opportunities for the development of business activity, as well as their business motivations

The multiscenario lot size problem with concave costs

The dynamic single-facility single-item lot size problem is addressed. The finite planning horizon is divided into several time periods. Although the total demand is assumed to be a fixed value, the distribution of this demand among the different periods is unknown. Therefore, for each period the demand can be chosen from a discrete set of values. For this reason, all the combinations of the demand vector yield a set of different scenarios. Moreover, we assume that the production/reorder and holding cost vectors can vary from one scenario to another. For each scenario, we consider as the objective function the sum of the production/reorder and the holding costs. The problem consists of determining all the Pareto-optimal or non-dominated production plans with respect to all scenarios. We propose a solution method based on a multiobjective branch and bound approach. Depending on whether shortages are considered or not, different upper bound sets are provided. Computational results on several randomly generated problems are reported