Competencia emocional y percepción de toma de decisiones en jugadores de voleibol

El propósito de este estudio fue analizar las relaciones existentes entre la dimensión percibida de la toma de decisiones y la competencia emocional de jugadores de voleibol de diferentes niveles de pericia. Para llevar a cabo esta investigación se emplearon el Cuestionario de Estilos de Toma de Decisión en el deporte (CETD) (Ruiz, Graupera y Sánchez, 2000) para evaluar la dimensión percibida de la toma de decisiones y La Escala de Competencia Emocional en el Deporte (ECE-D) (Arruza, Arribas, González, Balagué, Romero y Ruiz, 2005). Participaron un total de 122 jugadores de voleibol de ambos sexos (76 mujeres y 46 hombres) y niveles de pericia (local y autonómico, nacional e internacional). Los resultados obtenidos mostraron diferencias significativas en función del nivel de pericia en la competencia decisional y la competencia emocional. No ocurrió lo mismo en función del sexo. En cuanto a las relaciones existentes entre las variables de ambos cuestionarios, destacamos las existentes entre la Competencia Decisional Percibida y el Reconocimiento Emocional (r=.311) y entre esta última y la Ansiedad y el Agobio al Decidir (r=.-405)

Medium-modified average multiplicity and multiplicity fluctuations in jets

The energy evolution of average multiplicities and multiplicity fluctuations in jets produced in heavy-ion collisions is investigated from a toy QCD-inspired model. In this model, we use modified splitting functions accounting for medium-enhanced radiation of gluons by a fast parton which propagates through the quark gluon plasma. The leading contribution of the standard production of soft hadrons is enhanced by a factor $\sqrt{N_s}$ while next-to-leading order (NLO) corrections are suppressed by $1/\sqrt{N_s}$, where the parameter $N_s>1$ accounts for the induced-soft gluons in the medium. Our results for such global observables are cross-checked and compared with their limits in the vacuum.Comment: 8 pages and 4 figures. Version to be published in EPJ

GRAMI-2 : desarrollo de un test para evaluar la coordinación motriz global en la educación primaria = GRAMI-2 : development of a motor coordination test for the assessment of primary school children = GRAMI-2 : desenvolvimento de um teste para avaliar a coordenação motora global em educação básica

El presente estudio presenta el desarrollo y validación de un test motor para los escolares de 8 a 12 años. Un panel de expertos se responsabilizó de la selección de las tareas que conformaron la composición inicial del test, el cual fue aplicado a una muestra de 1360 escolares de edades comprendidas entre 7 y 12 años, de los cuales 709 fueron chicos y 651 chicas. La segunda versión del test quedó constituida por 8 pruebas. Fue aplicada a otra muestra de 1664 escolares de 8 a 12 años, de los cuales 864 fueron chicos y 800 chicas. Los datos obtenidos fueron analizados mediante análisis factorial exploratorio (AFE) y análisis factorial Confirmatorio (AFC), encontrando como resultado un modelo con una sola componente y 6 indicadores, por lo que el test final quedó constituido por 6 tareas. La fiabilidad mediante el cálculo de la consistencia interna y del test-retest fue muy satisfactoria, en ambos casos por encima de .80. La validez criterial mediante su relación con una escala de osbervación de la competencia motriz mostró relaciones muy satisfactorias

Autopercepción de inteligencia contextual para jugar y de competencia decisional en el fútbol = Game intelligence and perceived competence to decide on soccer players

En el presente estudio se analizó la autopercepción de competencia decisional y la inteligencia contextual de jugadores de fútbol de diferente nivel de pericia. Además, se exploraron las relaciones existentes entre las autopercepciones de competencia para decidir y de inteligencia contextual en jugadores de fútbol, para lo cual participaron voluntariamente 467 jugadores (M = 20,26, DT = 4,83). El nivel de pericia de los participantes se estableció en tres diferentes: Autonómico (N = 141), nacional (N = 253) e internacional (N = 73), de un total de 46 clubes españoles así como de varias selecciones nacionales. Se utilizaron dos instrumentos en forma de cuestionarios. El primero fue el Cuestionario de Inteligencia Contextual Percibida en el Deporte (ICD) y el segundo el de Estilos de Toma de Decisión en el Deporte (CETD). Los resultados mostraron que la competencia decisional y la inteligencia contextual están relacionadas y mejoran según aumenta el nivel deportivo. ----------ABSTRACT---------- The aim of this paper was to analyze decisional competence and contextual intelligence in sport among different level of expertise football players. In addition, the relationship between self-perceptions of decisional competence and contextual intelligence was assessed. Participants were 467 football players (M=20,26, DT=5,43). They were assigned three levels of expertise: Autonomic (N = 141), National (N = 253) and International (N = 73), from a group of 46 spanish clubs and several national teams. The Contextual Intelligence in Sport Questionnaire (ICD) and the Decision Making in Sport Questionnaire (CETD) were used to explore self-perceptions of players. Results showed that self-perceptions of Contextual Intelligence and Decision Making increased with the level of expertise

Synthesis of a 12R-type hexagonal perovskite solid solution Sr3NdNb3-xTixO12-delta and the influence of acceptor doping on electrical properties

A solid solution forms for Sr3NdNb3−xTixO12−δ with approximate limits 0 ≤ x ≤ 0.06. The system crystallizes with a 12R-type hexagonal perovskite structure in the space group R[3 with combining macron], as determined by neutron diffraction and selected area electron diffraction. The electrical properties of the end members have been investigated by impedance spectroscopy in the temperature range 550–800 °C under various gas atmospheres and as a function of oxygen and water-vapour partial pressure. Proton transport dominates under wet oxidising conditions in the temperature range 550–700 °C, as confirmed by the H+/D+ isotope effect. Acceptor doping considerably enhances proton conductivity with a value of 3.3 × 10−6 S cm−1 for the bulk response of x = 0.06 at 700 °C in moistened air. The presence of a −¼ slope for both doped and undoped samples in the range 10−19 ≤ pO2 ≤ 10−8 atm at 900 °C indicates n-type transport under reducing conditions following the extrinsic model attributable to acceptor centres. The conductivity is essentially independent of pO2 at 600 °C under dry oxidising conditions, consistent with oxide-ion transport; a positive power-law dependence at higher temperature indicates extrinsic behaviour and a significant electron–hole contribution. The dielectric constant at RT of nominally stoichiometric Sr3NdNb3O12 is εr ∼ 37, with a moderately high quality factor of Q × f ∼ 16 400 GHz at fr ∼ 6.4 GHz. The temperature coefficient of resonant frequency of x = 0 is τf ∼ 12 ppm °C−1, which lowers to −3 ppm °C−1 for the Ti-doped phase x = 0.06

Inteligencia contextual y pericia en el fútbol

Para los entrenadores la inteligencia en el juego es uno de los intangibles que predicen el éxito en la competición. De ahí que el objetivo de este estudio fuera analizar la percepción que jugadores de fútbol de diferente nivel de pericia tenían de su inteligencia para el juego. Se aplicó el Cuestionario de Inteligencia Contextual en el Deporte (ICD) que evalúa tres dimensiones: Inteligencia Anticipatoria, Inteligencia Táctica e Inteligencia Competitiva. En este estudio participaron 690 jugadores de fútbol de diferente nivel competitivo. Los resultados mostrarion que a medida que aumentaba el nivel competitivo se incrementaba la percepción de los jugadores sobre su inteligencia contextual. Este estudio confirma el papel que para los jugadores posee el sentirse 308 competentes para solucionar los problemas tácticos de su deporte y que este sentimiento aumenta con su nivel de competencia

Nickel tissue residue as a biomarker of sub-toxic exposure and susceptibility in amphibian embryos

Although low level exposure to physicochemical agents is the most common environmental scenario, their effects on living organisms are very controversial. However, there is an increasing need to integrate low level exposures from risk assessment to remediation purposes. This study focus on the possibility to employ Ni tissue residue values as biomarkers of sub-toxic exposure and susceptibility to this metal in a range of almost pristine to sub-toxic concentrations for Rhinella arenarum embryos. For that purpose, three batches of amphibian embryos were pretreated during 10 days with three increasing concentrations of Ni starting in 2, 8 and 20 ìg Ni2+ L-1 and ending in 16, 64 and 160 ìg Ni2+ L-1 (in natural fresh waters this value ranges from 2 to 10 ìg L-1; the LC50-24 hr for R. arenarum is 26.2 mg Ni2+ L-1). For the experimental conditions, the Ni tissue residue values at 360 hr post exposure were 0.5, 2.1 and 3.6 ìg Ni g-1 embryo w/w respectively, corresponding to BCFs of 31, 33 and 23. The susceptibility to Ni in those experimental embryos was evaluated by means of challenge exposures to three lethal concentrations of this metal (10, 20 and 30 mg Ni2+ L-1), registering survival during the following 10 days of treatment. As a general pattern, the lower, intermediate and higher pretreatments with Ni resulted in enhanced, neutral and adverse effects on embryonic survival respectively. Thus, sub-toxic exposure to Ni could modify the resistance of the amphibian embryo to this metal and Ni tissue residue values could be considered as biomarkers of both, exposure and susceptibility.Fil: Perez Coll, Cristina Silvia. Fundación Pro Salud y Medio Ambiente; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; ArgentinaFil: Sztrum, Abelardo. Fundación Pro Salud y Medio Ambiente; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Herkovits, Jorge. Fundación Pro Salud y Medio Ambiente; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Hierarchically Porous Gd3+-Doped CeO2 Nanostructures for the Remarkable Enhancement of Optical and Magnetic Properties

Rare earth ion-doped CeO2 has attracted more and more attention because of its special electrical, optical, magnetic, or catalytic properties. In this paper, a facile electrochemical deposition route was reported for the direct growth of the porous Gd-doped CeO2. The formation process of Gd-doped CeO2 composites was investigated. The obtained deposits were characterized by SEM, EDS, XRD, and XPS. The porous Gd3+- doped CeO2 (10 at% Gd) displays a typical type I adsorption isotherm and yields a large specific surface area of 135 m2/g. As Gd3+ ions were doped into CeO2 lattice, the absorption spectrum of Gd3+-doped CeO2 nanocrystals exhibited a red shift compared with porous CeO2 nanocrystals and bulk CeO2, and the luminescence of Gd3+-doped CeO2 deposits was remarkably enhanced due to the presence of more oxygen vacancies. In addition, the strong magnetic properties of Gd-doped CeO2 (10 at% Gd) were observed, which may be caused by Gd3+ ions or more oxygen defects in deposits. In addition, the catalytic activity of porous Gd-doped CeO2 toward CO oxidation was studied

Sustainable pome fruit production in Patagonia, Argentina

Apple and pear production in Argentina mostly takes place in the provinces of Río Negro and Neuquén, along a valley located in an area irrigated by the rivers Neuquén, Limay and Negro. Most commonly agrochemicals applied for these cultures protection are pesticides against mite and codling moth (Cydiapomonella, L). Carbaryl,azinphos-methyl and dimethoate have been recently detected and quantified in water samples from these rivers. Heptachlor, was also found sporadically, despite its use is forbidden in our country. Although these organophosphorus pesticides use is allowed, dimethoate and azinphos-methyl, as well as carbaryl are harmful substances that exert adverse effects through inhibition of cholinesterases and carboxylesterases. Also they are responsible of eliciting antioxidant responses in different organisms. Fruit production in this region became more sustainable in the last years as the consequence of government prohibition on the use of old generation pesticides and the introduction of new generation ones. A National Program designed to avoid codling moth damage, through a sexual confusion method, was implemented in 2006. The codling moth induced damage reached 6,1% of total production in 2003 in farms that were afterwards included in the Program, and 0,73% of it, after 3 years of program development; and at the same time there was a 385 ton/year decrease in azimphos-methyl use. Improvement in management techniques for pests as San José louse and European red mite, as well as government programs for their control promoting the use of non-toxic natural compounds, will certainly contribute to achieve sustainable fruit production in Patagonia.Fil: Sfara, Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; ArgentinaFil: Fonovich, Teresa Mabel. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; ArgentinaFil: Perez Coll, Cristina Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; Argentin