Ansiedad pre-competitiva y conductas de autocontrol en jugadores de futbol

Partiendo de la conceptualización de la ansiedad dentro de la teoría de rasgo-estado, se estudia la ansiedad precompetitiva de un equipo de fútbol de tercera división. Durante cinco partidos, se aplicó el cuestionario CSAI-2 momentos antes de las competiciones, registrándose la ansiedad cognitiva, somática y autoconfianza precompetitiva de los jugadores. Los partidos se filmaron y posteriormente se estudiaron las conductas no reglamentarias tales como agresiones físicas, protestas al árbitro, protestas a los compañeros de juego, respuestas dadas ante una agresión, tarjetas amarillas, faltas señaladas al jugador y errores garrafales cometidos en el área. De esta forma, se intenta predecir si los jugadores con altas puntuaciones en el cuestionario CSAI-2 mostrarían conductas agresivas durante las competiciones. Los resultados del estudio no muestran correlaciones estadísticamente significativas entre las puntuaciones en CSAI-2 y la aparición de las conductas antideportivas. Finalmente, se discuten diferentes aspectos de la capacidad predictiva del cuestionario de MartensUsing the State-Trait Anxiety Theory, a study about pre competitive anxiety in a 3rd division soccer team players is presented. During five soccer games, the CSAI-2 was individually administrated, a few minutes before starting, and the scores of cognitive, somatic and self-reliance anxiety were taken. All of the soccer games were video taped and then several impartial observers transcribed illicit or/and erroneous sport behaviors during the games: aggression, complains to the referee, serious sport mistakes, penalties, etc. In this analysis we try to assess if the score in a pre competitive anxiety inventory predicts some of these behaviors during the competition. No statistically significant correlation between CSAI-2 scores and sport illicit behaviors were foun

Valoración de la fuerza explosiva en esgrima

La fuerza explosiva es una capacidad física muy importante en la esgrima, por lo que su valoración resulta importante para el control y planificación del entrenamiento. El objetivo principal de este estudio fue valorar la fuerza explosiva general y específica en tiradores de alto nivel. Se aplicaron dos tests genéricos de fuerza explosiva (salto vertical sin contramovimiento –SJ-, y salto vertical con contramovimiento -CMJ-), y cuatro tests específicos (Fondo desde parado -F-, Fondo desde Saltos -FS-, Flecha desde parado -FL- y Flecha desde Saltos -FLS-) a 17 tiradores masculinos pertenecientes al equipo nacional español absoluto de esgrima. Se utilizaron dos plataformas de fuerza, una para cada apoyo. A partir de los datos de las fuerzas de reacción se obtuvieron las variables determinantes de la fuerza explosiva tales como el desplazamiento vertical (detente) o la velocidad horizontal de de despegue. Se observa que la batería de tests llevada a cabo proporciona, en un corto periodo de tiempo, una información de gran relevancia para el control y la planificación del entrenamiento con el objetivo de intentar optimizar el rendimiento de los deportistas. Se han encontrado diferencias significativas entre las fuerzas verticales máximas en cada apoyo en el salto vertical lo que puede estar asociado con asimetrías de la fuerza muscular.Explosive strength is one of the most important physical capacities in fencing. The evaluation of explosive strength is fundamental for the planning and control of the training program. The purpose of this study was to assess the general and specific explosive strength in 17 senior male fencers of the national Spanish team. They carried out general explosive strength tests: Squat Jump (SJ) and Counter Movement Jump (CMJ); and specific explosive strength tests: Lunge from static position (F), Lunge from bounces (FS), Flèche from static position (FL) and Flèche from bounces (FLS). From the information of the reaction forces there were obtained the determinant variables of the explosive strength, such as the vertical displacement or the takeoff horizontal speed. The results were obtained from two force platforms, one for each support. Results showed that the tests carried out provided, in a short time, relevant information to plan and control the training program in order to the improve athletes performance. Significant differences were found between the vertical maximal strength in each support in the vertical jump. These differences can be associated with asymmetries of the muscular force.Peer Reviewe

Resultados prácticos de la aplicación de estándares industriales a la interoperabilidad en el regadío: Proyecto Mega

La falta de estandarización en los sistemas de telecontrol de regadío dificulta enormemente la gestión y el mantenimiento de los mismos, pero no menos importante es reconocer que dificulta la explotación de las propias infraestructuras modernizadas. El proyecto MEGA define los criterios para establecer interoperabilidad entre los diferentes sistemas de control y gestión que se emplean en el regadío. Dicha interoperabilidad se basa en el establecimiento de una nueva arquitectura de control a través de la cual se comuniquen los diferentes sistemas mediante un lenguaje de modelización desarrollado exprofeso. El desarrollo teórico de la modelización y el diseño de la nueva arquitectura tienen un largo recorrido y son conocidos por todo el sector. Se pretende presentar a continuación cómo se ha procedido a la validación empírica de esas bases teóricas estableciéndose una interoperabilidad real entre diferentes sistemas, participando en las pruebas diferentes agentes del sector del regadío.The lack of standardization of telecontrol systems for irrigation complicates their management and maintenance as well as the exploitation of modernized infrastructures. The MEGA project defines the criteria for establishing interoperability between different control and management systems used in irrigation. Such interoperability is based on the establishment of a new control architecture enabling the communication of various systems by a modeling language developed for this purpose. The theoretical development of modeling and design of the new architecture have a long way and are known throughout the sector. In this work we present the procedure to empirical validation of these theoretical bases, establishing a real interoperability between different systems, participating different operators from the irrigation sector in the testing

A Bayesian model for anchovy (Engraulis encrasicolus): the combined forcing of man and environment

Fishery collapses frequently result from combined pressures of the environment and man, which are difficult to discern because of the complexities involved and our limited knowledge. Models to resolve this complexity often become too sophisticated, with too many assumptions and, consequently, with little capacity to predict beyond calibration data. In this paper we implement a different procedure where the model is kept simple and uncertainty accounts for the equation imperfectness to reproduce ecological complexity. Human and environmental forcing on an anchovy (Engraulis encrasicolus) stock are simulated with only six parameters plus their error terms, and the uncertainty is computed with Bayesian methods. The simple structure is able to reproduce the major dynamical features of this species in the Gulf of Ca´diz, including data on life stages and age structure that had no contact with the model. This is a distinct performance for a frugal approach working on a mid-trophic species and a positive instance where parsimony can simulate the interaction of man, fish and the environment, provided uncertainty is accounted for in the process.Publicado

HIV and antiretroviral treatment knowledge gaps and psychosocial burden among persons living with HIV in Lima, Peru

This study aims to describe knowledge on HIV and antiretroviral (ARV) treatment and psychosocial factors among people living with HIV (PLWH) in Lima, Perú, to explore characteristics associated to this knowledge, and determine its impact on sustained viral suppression. A cross-sectional survey was conducted among 171 PLWH at the largest referral health care center in Lima. The psychosocial factors measured were depression, risk of alcoholism, use of illegal drugs and disclosure. A participant had "poor knowledge" when less than 80% of replies were correct. Sustained viral suppression was defined as two consecutive viral loads under 50 copies/mL. A total of 49% and 43% had poor HIV and ARV knowledge respectively; 48% of the study population screened positive for depression and 27% reported feeling unsupported by the person they disclosed to. The largest gaps in HIV and ARV knowledge were among 98 (57%) that did not recognize that HIV increased the risk of cancer and among 57 (33%) participants that did not disagree with the statement that taking a double dose of ARV if they missed one. Moderate depression was significantly associated to poor HIV and ARV knowledge. Non-disclosure and being on ARVs for less than 6 months were associated with not achieving sustained viral suppression. Our findings highlight important HIV and ARV knowledge gaps of PLWH and a high burden of psychosocial problems, especially of depression, among PLWH in Lima, Peru. Increasing knowledge and addressing depression and disclosure could improve care of PLWH

Facies generadoras de carbón en el Westfaliense superior de la Cuenca Carbonífera Central Asturiana

La Cuenca Carbonífera Central Asturiana constituye una cuenca de antepais individualizada en la Zona Cantábrica durante el Carbonifero Superior coincidiendo con la máxima actividad de la orogenia Hercinica. Durante el Westfaliense, se acumularon en ella importantes volúmenes de material clástico procedentes de los relieves en elevación situados al W. Los abanicos aluviales costeros constituyeron unos sistemas deposicionales muy eficientes en la dispersión de estos materiales, generaron extensas cuñas clásticas en relación con las cuales se originaron capas de carbón explotables. En este trabajo se estudian varios litosomas de edad Westfaliense Superior que representan episodios progradantes de estos sistemas sobre ambientes marinos someros v de transición. El análisis e interpretación de sus facies y geometrías permite la reconstrucción de las condiciones ambientales en que se generaron las capas de carbón asociadas a cada una de las unidades estudiadas. Estas se desarrollaron: 1) en zonas marginales a los lóbulos progradantes y zonas interlóbulos y 2) sobre los mismos una vez que éstos fueron abandonados y previamente a su enterramiento

Anomalous circular polarization profiles in the He I 1083.0 nm multiplet from solar spicules

We report Stokes vector observations of solar spicules and a prominence in the He I 1083 nm multiplet carried out with the Tenerife Infrared Polarimeter. The observations show linear polarization profiles that are produced by scattering processes in the presence of a magnetic field. After a careful data reduction, we demonstrate the existence of extremely asymmetric Stokes V profiles in the spicular material that we are able to model with two magnetic components along the line of sight, and under the presence of atomic orientation in the energy levels that give rise to the multiplet. We discuss some possible scenarios that can generate the atomic orientation in spicules. We stress the importance of spectropolarimetric observations across the limb to distinguish such signals from observational artifacts.Comment: accepted for publication in Ap

Agroecological analysis of cucumber (Cucumis sativus L.) crops in orchards in a Mediterranean environment

If adaptability is defined as the ability of a crop (or variety) to respond positively to changes in agricultural conditions, the purpose of this study was to explore the adaptability and relative influence of environmental factors on Cucumber Sativus L. to a specific Mediterranean environmental and agroecological site: Huete (Cuenca, Central Spain). Cucumber requires high temperatures and soil moisture for a satisfactory yield and maintaining an optimum level of humidity is very favorable, which is easy to achieve for farmers in Huete. Abundant sunshine is needed and this is another reason to cultivate during the summer period; it is estimated that there were between 2700 and 2800 hours of sunshine in the Huete area. The study described here revealed that the soils are poorly developed and evolved, with a simple Ap-C or Ap-Bw-C morphology. The soils are friable, slightly adherent and somewhat dry and hard. A significant feature is the presence of good drainage and appreciable effective depth. Like other crops, cucumber plants are preferably grown on loose, well-drained soils, such as the soils studied here. Huete cucumber seems able to tolerate certain levels of soil salinity when compared to other species. The cucumbers are irrigated with water with moderate electrical conductivity without an appreciable decrease in yield. Small doses of salinity may be one of the factors that leads to the characteristics associated with Huete cucumber, an aspect that would need to be investigated more deeply. Substrate nutrients and moisture management are two major concerns regarding Cucumber Sativus L. crops in Huete. Elemental chemical analysis revealed that strontium abounds and this is attributed to the presence of this element in the gypsums. The results of this study open a new horizon in the study of the aptitude of the land and represent a useful step towards the specific site and, consequently, the sustainable management of land under cucumber cultivation. Further research into a wider range of soils, fertilizer compositions and release rates is require

IMF - metallicity: a tight local relation revealed by the CALIFA survey

Variations in the stellar initial mass function (IMF) have been invoked to explain the spectroscopic and dynamical properties of early-type galaxies. However, no observations have yet been able to disentangle the physical driver. We analyse here a sample of 24 early-type galaxies drawn from the CALIFA survey, deriving in a homogeneous way their stellar population and kinematic properties. We find that the local IMF is tightly related to the local metallicity, becoming more bottom-heavy towards metal-rich populations. Our result, combined with the galaxy mass-metallicity relation, naturally explains previous claims of a galaxy mass-IMF relation, derived from non-IFU spectra. If we assume that - within the star formation environment of early-type galaxies - metallicity is the main driver of IMF variations, a significant revision of the interpretation of galaxy evolution observables is necessary.Comment: Accepted for publication in ApJL. 6 pages, 4 figure