Intención y práctica de actividad física en maestros españoles

El objetivo de este trabajo fue comparar la práctica actividadfísica semanal y la intención de mantenerse físicamente activos en maestrosde educación infantil y primaria, así como conocer si les condiciona en estosaspectos su situación personal y laboral. Los participantes de este estudiofueron 415 maestros, 162 hombres y 353 mujeres. Se adaptó y validó, através de una análisis factorial y confirmatorio, el cuestionario Intentionto be Physically Active de Hein, Müür y Koka (2004) para una poblaciónde adultos en el ámbito laboral, alcanzado una fiabilidad alta (α=.91). Elanálisis inferencial mostró que la mujeres hacen menos actividad física quelos hombres y que en la práctica habitual de actividad física y en la intenciónde ser físico activo los/as docentes solteros/as y sin hijos puntúan más altoque los casados y con hijos. Los maestros y maestras que más actividadfísica realizan presentan una mayor intención a realizar actividad física enel futuro, y estos resultados se interpretan en relación al tiempo de ocio quetienen los participantes en este estudio y las variables sociales que incidenen el mismo

Surrogate-based optimization of tidal turbine arrays: a case study for the Faro-Olhão inlet

This paper presents a study for estimating the size of a tidal turbine array for the Faro-Olhão Inlet (Potugal) using a surrogate optimization approach. The method compromises problem formulation, hydro-morphodynamic modelling, surrogate construction and validation, and constraint optimization. A total of 26 surrogates were built using linear RBFs as a function of two design variables: number of rows in the array and Tidal Energy Converters (TECs) per row. Surrogates describe array performance and environmental effects associated with hydrodynamic and morphological aspects of the multi inlet lagoon. After validation, surrogate models were used to formulate a constraint optimization model. Results evidence that the largest array size that satisfies performance and environmental constraints is made of 3 rows and 10 TECs per row.Eduardo González-Gorbeña has received funding for the OpTiCA project (http://msca-optica.eu/) from the Marie Skłodowska-Curie Actions of the European Union's H2020-MSCA-IF-EF-RI-2016 / GA#: 748747. The paper is a contribution to the SCORE pro-ject, funded by the Portuguese Foundation for Science and Technology (FCT–PTDC/AAG-TEC/1710/2014). André Pacheco was supported by the Portuguese Foun-dation for Science and Technology under the Portuguese Researchers’ Programme 2014 entitled “Exploring new concepts for extracting energy from tides” (IF/00286/2014/CP1234).info:eu-repo/semantics/publishedVersio

Influencia de la actividad físico – deportiva y la intención de ser físicamente activos en universitarios de la facultad de educación de la UEX

The current study analyse the physical activity and  sport registered and the intention of being physically active in the future in a sample of university students from the first level of the bachelor of primary education at the faculty of education (Badajoz) by sex. We have started with these variables due to a high percentage of adolescents that do not meet the recommendations of physical activity, showing a high prevalence of physical inactivity and sedentary behavior, prioritising another tasks or personal, academic or laboral activities. That study has been done under the quantitative paradigm with an associative, descriptive, comparative and cross strategy using the MIFAU questionnaire plus an ad-hoc questionnaire to know the participant’s sociodemographic information. The sample was integrated by 170 participants (64.7% female and 35.3% male). Women showed less weekly physical activity in comparison with men with an intermediate effect size (U=2271.5; p smaller than 0.05; d=0.532) and the same if we compare that variable with the intention of being physically active in the future with a higher effect size (U=1754; p smaller than 0.05; d=0.828).La presente investigación analiza la cantidad de actividad físico - deportiva realizada y la intención de ser físicamente activo en el futuro, en una muestra de estudiantes universitarios del primer curso del Grado en Educación Primaria de la Facultad de Educación (Badajoz) en función del sexo. Hemos incidido en estas variables ya que existe un elevado porcentaje de adolescentes que no se mantienen suficientemente activos en su día a día, mostrando una alta prevalencia hacia la inactividad física y el comportamiento sedentario, priorizando en este sentido otras tareas o acciones personales, académicas o laborales. Dicho trabajo se ha realizado dentro del paradigma cuantitativo con una estrategia asociativa, descriptiva, comparativa y transversal utilizando el cuestionario MIFAU junto con un cuestionario Ad-hoc para conocer las variables sociodemográficas de los participantes. La muestra estaba formada por 170 sujetos (64,7% mujeres y 35,3% hombres). Los resultados más significativos en cuanto a la variable sexo revelan que las mujeres realizan menos actividad físico- deportiva a la semana que los hombres, cuyo tamaño del efecto es intermedio (U=2271,5, p menor que .05; d = .532), al igual que si comparamos dicha variable con la intención de ser físicamente activos en el futuro, en el que su tamaño del efecto es fuerte (U=1754, p menor que .05; d = .828)

The Nobel Prize In Chemistry 2016: Molecular Machines

The Nobel Prize in Chemistry 2016 was granted to Jean-Pierre Sauvage, Sir James F. Stoddart and Bernard (Ben) L. Feringa. These scientists were responsible for the creation and development of molecular machines. The development of such systems represents a breakthrough in the field of supramolecular chemistry, nanotechnology and organic synthesis. This article aims to bring simple and objective information to the scientific community about the work of these three researchers.40111312

The validity and reliability of a novel mobile app to measure agility performance in the physically active youth population

Agility is a key component of physical fitness in adolescents. However, the measurement of this variable is usually complex, requiring high cost instruments and complex software. To test the validity and reliabilityof a novel iPhone app (Lap Tracker Auto-timer) to measure agility performance among adolescents.Twenty-four physically active adolescents (15.7 ± 2.3 years old) participated in two testing sessions (separated by 7 days). They performed three 4 x 10 m agility test trials measured by Photocell or the iPhone app.The correlation analysis revealed high validity (r = .92; 95% confidence interval [CI] = .88 –.95), with a standard error of the estimate of 0.56 s (p < 0.001). The coefficient of variation (CV; 0.09) and intraclass correlation coefficient (ICC; .93; 95% CI = .85 –.97) showed an acceptable reliability.This study demonstrated that the iPhone App Lap Tracker Auto-timer could be a valid, reliable and low-cost tool to evaluate agility performance in adolescents. However, more studies are required to guarantee the utility of this app

Basketball game-related statistics that discriminate between teams season-long success

The aim of the present study was to identify the game-related statistics that discriminate between season-long successful and unsuccessful basketball teams participating in the Spanish Basketball League (LEB1). The sample included all 145 average records per season from the 870 games played between the 2000-2001 and the 2005-2006 regular seasons. The following game-related statistics were gathered from the official box scores of the Spanish Basketball Federation: 2- and 3-point field-goal attempts (both successful and unsuccessful), free-throws (both successful and unsuccessful), defensive and offensive rebounds, assists, steals, turnovers, blocks (both made and received), and fouls (both committed and received). To control for season variability, all results were normalized to minutes played each season and then converted to z-scores. The results allowed discrimination between best and worst teams' performances through the following game-related statistics: assists (SC=0.47), steals (SC=0.34), and blocks (SC=0.30). The function obtained correctly classified 82.4% of the cases. In conclusion, season-long performance may be supported by players' and teams' passing skills and defensive preparation

Estudio de las variables pedagógicas en tareas de enseñanza del fútbol en función de la parte de sesión

The objective of this study was to analyze the pedagogical variables of the tasks designed by the pre-service teachers for the teaching of school soccer based on the parts of the session. 307 tasks designed by 6 teachers in training have been codified through the Integral System for the Analysis of the Training Tasks (SIATE). The pedagogical variables classified by this system were analyzed: game situation, goalkeeper presence, game phase, content type I and II, specific content, teaching medium, level of opposition, type of participation and Feedback. A descriptive and inferential analysis was carried out using the Chi-Square test, Cramer's V test and the Corrected Typified Waste. The results show significant differences (p &lt;.05) in the design of the tasks for each part of the session with respect to the pedagogical variables, except in the variable type of content II.El objetivo de este estudio fue analizar las variables pedagógicas de las tareas diseñadas por los profesores de pre-servicio para la enseñanza del futbol escolar en función de las partes de la sesión. Se han codificado 307 tareas diseñadas por 6 profesores en formación a través del Sistema Integral para el Análisis de las Tareas de Entrenamiento (SIATE). Se analizaron las variables pedagógicas que clasifica este sistema: situación de juego, presencia de portero, fase de juego, tipo de contenido I y II, contenido específico, medio de enseñanza, nivel de oposición, tipo de participación y Feedback. Se realizó un análisis descriptivo e inferencial mediante la prueba Chi-Cuadrado, V de Cramer y los Residuos Tipificados Corregidos. Los resultados muestran diferencias significativas (p&lt;.05) en el diseño de las tareas para cada parte de la sesión con respecto a las variables pedagógicas, excepto en la variable tipo de contenido II

The Nobel Prize in Chemistry 2016: molecular machines

The Nobel Prize in Chemistry 2016 was granted to Jean-Pierre Sauvage, Sir James F. Stoddart and Bernard (Ben) L. Feringa. These scientists were responsible for the creation and development of molecular machines. The development of such systems represents a breakthrough in the field of supramolecular chemistry, nanotechnology and organic synthesis. This article aims to bring simple and objective information to the scientific community about the work of these three researchers.The Nobel Prize in Chemistry 2016 was granted to Jean-Pierre Sauvage, Sir James F. Stoddart and Bernard (Ben) L. Feringa. These scientists were responsible for the creation and development of molecular machines. The development of such systems represents401113123sem informaçãosem informaçã

Síndrome de «burnout» y apoyo social en maestros de Educación Primaria

This paper examines the relationship between burnout and perceived social support in a sample of 801 Primary School teachers. The Maslach Burnout Inventory (MBI) and the Duke-UNC-11 questionnaire were used. The statistical method used was canonical correspondence analysis, where the linear combination of the social support factors that maximises the dispersion of values of the three dimensions of the MBI was selected. The results of the study show that perceived social support relates to each of the dimensions of burnout syndrome in a different way and that is key to restore psychosocial balance.Este trabajo examina la relación entre burnout y apoyo social percibido en una muestra de 801 maestros de Educación Primaria. Para ello se usa el Maslach Burnout Inventory (MBI) y el cuestionario Duke-UNC-11. El método estadístico empleado fue el análisis canónico de correspondencias, donde se seleccionó la combinación lineal de los factores del apoyo social que maximiza la dispersión de valores de las tres dimensiones del MBI. Los resultados muestran que un 20,8% de los maestros sufre burnout. El apoyo social percibido, en su carácter restaurador del equilibrio psicosocial, se relaciona de distinto modo con las tres dimensiones del burnout.</em