Motivos de la práctica del pádel en relación a la edad, el nivel de juego y el género

The aim of this study was to determine the motivations that may explain the actual increment in padel practice through different socio-demographic parameters such as sex, age or category. A total of 77 participants (43male and 34female), completed a questionnaire addressing sociodemographic information and the "Measurement Scale Motives for Physical Activity-Revised (MPAM-R)". The results point outed enjoyment (6.07) as the most valued reason for practice. Other appreciated reasons were competition (5.43), fitness / health (5.49) and sociability (5.07), being appearance the least scored (3.97). Significant differences were observed between categories (p<0.05). Current data provide useful information to sports centres managers in designing action plans to improve the quality of services offered, as well as supporting the teaching and learning process in padel.El objetivo de este estudio fue determinar los motivos que han provocado el actual crecimiento en la práctica del pádel en diferentes parámetros sociodemográficos como el género, la edad, el tiempo de práctica y la categoría de juego. Un total de77 participantes (43 hombres y 34 mujeres) respondió a las preguntas de un cuestionario sociodemográfico y de la “Escala de Medida de los Motivos para la Actividad Física-Revisada (MPAM-R)”. Los resultados muestran que el motivo más valorado fue el disfrute (6.07) como causa principal de la práctica del pádel. Otros motivos también valorados han sido la competencia (5.43), el fitness/salud (5.49) y la sociabilidad (5.07), mientras que el menos valorado fue la apariencia (3.97). Se encontraron diferencias significativas en los motivos de práctica en función de la categoría de juego (p<0.05). Estos datos ofrecen información muy útil a la hora de diseñar planes de actuación que aumenten la calidad de servicios ofrecidos en los centros deportivos, así como para la mejora del proceso enseñanza-aprendizaje del pádel

Diseño y validación de un instrumento de observación de las conductas que alteran la convivencia en educación física

El objetivo del presente trabajo fue diseñar y validar un instrumento de observación de conductas que alteran la convivencia en las clases de Educación Física, que permita definirlas, categorizarlas y medirlas cuantitativamente. Este proceso de validación se llevó a cabo en varias fases y contó con la participación de seis jueces expertos en el ámbito de la enseñanza de la Educación Física y cuatro observadores formados en el análisis de las conductas que alteran el clima de convivencia en las clases de Educación Física. Observaron un total de diez clases de Educación Física, de sexto de Educación Primaria y de tercero de la Educación Secundaria de diez centros escolares diferentes, analizando la estructura del instrumento mediante procedimientos confirmatorios. El instrumento final estuvo formado por ocho conductas que alteran la convivencia en las clases de Educación Física, agrupadas en dos factores (conductas violentas y conductas de indisciplina y desinterés). Los resultados obtenidos en el proceso de validez, fiabilidad y consistencia interna indican que el instrumento diseñado es válido para registrar las conductas que alteran la convivencia en las clases de Educación Física y permite su aplicación sin la presencia del observador en el aula, minimizando así el efecto de esa presencia en el comportamiento del alumnado.The aim of this study was to design and validate an instrument of observation that would allow us to measure and quantify student misconduct during classes of physical education. This process of validation was carried out in several phases. Six expert judges in physical education teaching and four observers trained to measure student misconduct in physical education lessons participated in the process, analysing ten physical education lessons of sixth and ninth grade from ten different schools, settings the structure of the instrument through confirmatory procedures. The final instrument consisted of eight items describing different kinds of student misconduct during physical education classes, grouped into two categories (violent behaviours and undisciplined and disinterested behaviours). The results obtained in the process of validation, reliability and internal consistency suggest that the instrument designed is optimally useful and reliable to measure student misconduct during physical education classes, allowing its application without the presence of the investigator in the classroom, thus minimizing its effect on the behaviour of the student body

Mapa de series, geoseries y geopermaseries de vegetación de España (Memoria del mapa de vegetación potencial de España). Parte II

Peer Reviewe

Usefulness of bone turnover markers as predictors of mortality risk, disease progression and skeletal-related events appearance in patients with prostate cancer with bone metastases following treatment with zoledronic acid: TUGAMO study

Owing to the limited validity of clinical data on the treatment of prostate cancer (PCa) and bone metastases, biochemical markers are a promising tool for predicting survival, disease progression and skeletal-related events (SREs) in these patients. The aim of this study was to evaluate the predictive capacity of biochemical markers of bone turnover for mortality risk, disease progression and SREs in patients with PCa and bone metastases undergoing treatment with zoledronic acid (ZA). Methods: This was an observational, prospective and multicenter study in which ninety-eight patients were included. Patients were treated with ZA (4mg every 4 weeks for 18 months). Data were collected at baseline and 3, 6, 9, 12, 15 and 18 months after the beginning of treatment. Serum levels of bone alkaline phosphtase (BALP), aminoterminal propeptide of procollagen type I (P1NP) and beta-isomer of carboxiterminal telopeptide of collagen I (b-CTX) were analysed at all points in the study. Data on disease progression, SREs development and survival were recorded. Results: Cox regression models with clinical data and bone markers showed that the levels of the three markers studied were predictive of survival time, with b-CTX being especially powerful, in which a lack of normalisation in visit 1 (3 months after the beginning of treatment) showed a 6.3-times more risk for death than in normalised patients. Levels of these markers were also predictive for SREs, although in this case BALP and P1NP proved to be better predictors. We did not find any relationship between bone markers and disease progression. Conclusion: In patients with PCa and bone metastases treated with ZA, b-CTX and P1NP can be considered suitable predictors for mortality risk, while BALP and P1NP are appropriate for SREs. The levels of these biomarkers 3 months after the beginning of treatment are especially importantThis study was supported by Novartis Oncology Spai

Validity and reliability of a computer-assisted system method to measure axial vertebral rotation

BACKGROUND: Axial vertebral rotation and Cobb’s angle are essential parameters for analysing adolescent idiopathic scoliosis. This study’s scope evaluates the validity and absolute reliability of application software based on a new mathematical equation to determine the axial vertebral rotation in digital X-rays according to Raimondi’s method in evaluators with different degrees of experience. METHODS: Twelve independent evaluators with different experience levels measured 33 scoliotic curves in 21 X-rays with the software on three separate occasions, separated one month. Using the same methodology, the observers re-measured the same radiographic studies three months later but on X-ray films and in a conventional way. RESULTS: Both methods show good validity and reliability, and the intraclass correlation coefficients are almost perfect. According to our results, the software increases 1.7 times the validity and 1.9 times the absolute reliability of axial vertebral rotation on digital X-rays according to Raimondi’s method, compared to the conventional manual measurement. CONCLUSIONS: The intra-group and inter-group agreement of the measurements with the software shows equal or minor variations than with the manual method, among the different measurement sessions and in the three experience groups. There is almost perfect agreement between the two measurement methods, so the equation and the software may be helpful to increase the accuracy in the axial vertebral rotation assessment

Search for the standard model Higgs boson in the H to ZZ to 2l 2nu channel in pp collisions at sqrt(s) = 7 TeV

A search for the standard model Higgs boson in the H to ZZ to 2l 2nu decay channel, where l = e or mu, in pp collisions at a center-of-mass energy of 7 TeV is presented. The data were collected at the LHC, with the CMS detector, and correspond to an integrated luminosity of 4.6 inverse femtobarns. No significant excess is observed above the background expectation, and upper limits are set on the Higgs boson production cross section. The presence of the standard model Higgs boson with a mass in the 270-440 GeV range is excluded at 95% confidence level.Comment: Submitted to JHE

Search for anomalous t t-bar production in the highly-boosted all-hadronic final state

A search is presented for a massive particle, generically referred to as a Z', decaying into a t t-bar pair. The search focuses on Z' resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 5 inverse femtobarns. Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z' modeled for several widths, as well as for a Randall--Sundrum Kaluza--Klein gluon. In addition, the results constrain any enhancement in t t-bar production beyond expectations of the standard model for t t-bar invariant masses larger than 1 TeV.Comment: Submitted to the Journal of High Energy Physics; this version includes a minor typo correction that will be submitted as an erratu

Combined search for the quarks of a sequential fourth generation

Results are presented from a search for a fourth generation of quarks produced singly or in pairs in a data set corresponding to an integrated luminosity of 5 inverse femtobarns recorded by the CMS experiment at the LHC in 2011. A novel strategy has been developed for a combined search for quarks of the up and down type in decay channels with at least one isolated muon or electron. Limits on the mass of the fourth-generation quarks and the relevant Cabibbo-Kobayashi-Maskawa matrix elements are derived in the context of a simple extension of the standard model with a sequential fourth generation of fermions. The existence of mass-degenerate fourth-generation quarks with masses below 685 GeV is excluded at 95% confidence level for minimal off-diagonal mixing between the third- and the fourth-generation quarks. With a mass difference of 25 GeV between the quark masses, the obtained limit on the masses of the fourth-generation quarks shifts by about +/- 20 GeV. These results significantly reduce the allowed parameter space for a fourth generation of fermions.Comment: Replaced with published version. Added journal reference and DO

Measurement of the t t-bar production cross section in the dilepton channel in pp collisions at sqrt(s) = 7 TeV

The t t-bar production cross section (sigma[t t-bar]) is measured in proton-proton collisions at sqrt(s) = 7 TeV in data collected by the CMS experiment, corresponding to an integrated luminosity of 2.3 inverse femtobarns. The measurement is performed in events with two leptons (electrons or muons) in the final state, at least two jets identified as jets originating from b quarks, and the presence of an imbalance in transverse momentum. The measured value of sigma[t t-bar] for a top-quark mass of 172.5 GeV is 161.9 +/- 2.5 (stat.) +5.1/-5.0 (syst.) +/- 3.6(lumi.) pb, consistent with the prediction of the standard model.Comment: Replaced with published version. Included journal reference and DO