Decision-making in school-age sport measured through a digital tool.

El objetivo de este estudio ha sido doble. Por un lado, diseñar y crear un software de evaluación de toma de decisiones en edad escolar, en base a aspectos espacio-temporales, contextualizado en voleibol, denominado “Juego Interactivo de Voleibol”. Por otro lado, analizar y establecer su fiabilidad y validez. El software diseñado se aplicó a una muestra de 132 escolares (64 niños y 68 niñas) de entre 10 y 13 años, de los centros educativos públicos de Educación Primaria y Secundaria de las localidades sevillanas de Arahal y Paradas (España). Para determinar la fiabilidad se estudió la consistencia interna a través del coeficiente alfa de Cronbach. Para calcular el número óptimo de repeticiones se utilizó el Coeficiente de Correlación Intraclase. La validez se comprobó en base a la evaluación de un grupo de 5 expertos. Los resultados indicaron que este nuevo software de evaluación alcanza altos niveles de fiablidad y validezThe aim of this study was twofold. On the one hand, the design and creation of an evaluation software for decision-making in school-age children based on spatial-temporal aspects in the context of volleyball called ‘Interactive Volleyball Game’. On the other hand, the analysis and establishment of its reliability and validity. The designed software was applied to a sample of 132 students (64 boys and 68 girls) aged between 10 and 13 years in public Elementary and Secondary Education schools of Seville towns, Arahal and Paradas (Spain). To determine the reliability, internal consistency was studied through Cronbach's alpha. The intraclass correlation coefficient (ICC) was also analyzed to calculate the optimal number of repetitions for future research. The validity was tested based on the assessment of a group of 5 experts. The results indicated that this new evaluation software reaches high levels of reliability and validit

Bipolar querying of valid-time intervals subject to uncertainty

Databases model parts of reality by containing data representing properties of real-world objects or concepts. Often, some of these properties are time-related. Thus, databases often contain data representing time-related information. However, as they may be produced by humans, such data or information may contain imperfections like uncertainties. An important purpose of databases is to allow their data to be queried, to allow access to the information these data represent. Users may do this using queries, in which they describe their preferences concerning the data they are (not) interested in. Because users may have both positive and negative such preferences, they may want to query databases in a bipolar way. Such preferences may also have a temporal nature, but, traditionally, temporal query conditions are handled specifically. In this paper, a novel technique is presented to query a valid-time relation containing uncertain valid-time data in a bipolar way, which allows the query to have a single bipolar temporal query condition

Calibration and First light of the Diabolo photometer at the Millimetre and Infrared Testa Grigia Observatory

We have designed and built a large-throughput dual channel photometer, Diabolo. This photometer is dedicated to the observation of millimetre continuum diffuse sources, and in particular, of the Sunyaev-Zel'dovich effect and of anisotropies of the 3K background. We describe the optical layout and filtering system of the instrument, which uses two bolometric detectors for simultaneous observations in two frequency channels at 1.2 and 2.1 mm. The bolometers are cooled to a working temperature of 0.1 K provided by a compact dilution cryostat. The photometric and angular responses of the instrument are measured in the laboratory. First astronomical light was detected in March 1995 at the focus of the new Millimetre and Infrared Testa Grigia Observatory (MITO) Telescope. The established sensitivity of the system is of 7 mK_RJ s^1/2$. For a typical map of at least 10 beams, with one hour of integration per beam, one can achieve the rms values of y_SZ ~ 7 10^-5 and the 3K background anisotropy Delta T/T ~ 7 10^-5, in winter conditions. We also report on a novel bolometer AC readout circuit which allows for the first time total power measurements on the sky. This technique alleviates (but does not forbid) the use of chopping with a secondary mirror. This technique and the dilution fridge concept will be used in future scan--modulated space instrument like the ESA Planck mission project.Comment: 10 pages, LaTeX, 12 figures, accepted for publication in Astronomy and Astrophysics Supplement Serie

La enseñanza universitaria apoyada en plataformas virtuales. Cambios en las prácticas docentes: el caso de la Universidad de Sevilla

El estudio de los usos de las plataformas virtuales en la enseñanza universitaria constituye hoy un referente de interés para la docencia. El objetivo de esta investigación es explorar los usos pedagógicos de estas herramientas, con la finalidad de identificar factores condicionantes y sus variables asociadas. Esta investigación, que analiza el caso de la Universidad de Sevilla, se basa en un estudio descriptivo, tipo encuesta. Los resultados obtenidos permiten establecer como conclusiones relevantes que las prácticas de enseñanza online están mediadas por las concepciones y creencias pedagógicas del profesorado; pero a su vez los usos tecnológicos influyen y transforman dichas concepcione

MALNUTRITION IS A MARKER of MORTALITY in CRITICALLY ILL CHILDREN WITH HYPERGLYCEMIA

Universidade Federal de São Paulo, São Paulo, BrazilUniv São Paulo, São Paulo, BrazilUniversidade Federal de São Paulo, São Paulo, BrazilWeb of Scienc

Wess-Zumino Terms for Reducible Anomalous Gauge Theories

Reducible off-shell anomalous gauge theories are studied in the framework of an extended Field-Antifield formalism by introducing new variables associated with the anomalous gauge degrees of freedom. The Wess-Zumino term for these theories is constructed and new gauge invariances appear. The quantum effects due to the extra variables are considered.Comment: 31 pages, Latex file, no figures. Section added. To appear in Nucl.Phys.

Cotilos impactados vs. roscados no cementados: estudio radiológico post-operatorio comparativo

Se han valorado radiografías AP de pelvis obtenidas tras colocación de 102 pró- tesis no cementadas en 97 pacientes: 51 eran del tipo cótilo roscado (CR), y 51 del tipo cótilo impactado (CI). Se ha medido el ángulo de inclinación, la posición del cotilo, el grado de centraje, el grado de protrusión/extrusión, y la superficie de contacto entre cótilo y la cavidad acetabular. Globahnente los CR quedan implantados más verticalmente que los CI (p=0,006), así como más lateralizados (p=0,02). El porcentaje de cótilos bien centrados en relación al acetábulo es mayor entre los CI que entre los CR (p=0,002). Un 19% de los CR quedaron parcialmente extraídos, no llegando a contactar con el fondo de la cavidad acetabular, mientras que en ningún caso de los CI se apreció este problema. En conclusión, a pesar de la teórica ventaja de poseer una estabilidad inicial mayor, la orientación de los CR no resulta tan óptima como la obtenida con los CI, lo que asegura una estabilidad mejor a largo plazo y una menor usura del polietileno.—Post-operative anteroposterior radiographs of the pelvis in 102 patients receiving a cementless total hip arthroplasty were analyzed. In a group, a screwed spherical socket (SCR) was applied, while in other a press-fit impacted socket (IMP) was used. The following parameters were studied: inclination angle, location and centering of the acetabular component, degree of protrusion-extrusion, and porcentage of contact surface between the socket and the acetabulum. SCR sockets appeared to be placed more vertically (p=0.006), and laterally (p=0.02) than IMP prostheses. The percent of properly centered sockets was higher among IMP than among SCR implants (p=0.002). SCR prostheses were found to be partly extruded in 19% of cases while none of the IMP prostheses had this problem. In conclussion, despite the theoretical advantage of the SCR implants having a better initial fixation than the IMP implants, the latter tend to be implanted in a more optimal position, thus ensuring a better longterm stability and therefore less wear problems can be expected