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1.
Perceived health problems in swimmers according to the chemical treatment of water in swimming pools
Álvaro Fernández-Luna Pablo Burillo José Luis Felipe Julio del Corral Jorge García-Unanue Leonor Gallardo 《European Journal of Sport Science》2016,16(2):256-265
The objective of this study was to determine which chemical treatment used for disinfecting water in indoor swimming pools had the least impact on users' perceptions of health problems, and which generated the greatest satisfaction with the quality of the water. A survey on satisfaction and perceived health problems was given to 1001 users at 20 indoor swimming pools which used different water treatment methods [chlorine, bromine, ozone, ultraviolet lamps (UV) and salt electrolysis]. The findings suggest that there is a greater probability of perceived health problems, such as eye and skin irritation, respiratory problems and skin dryness, in swimming pools treated with chlorine than in swimming pools using other chemical treatment methods. Pools treated with bromine have similar, although slightly better, results. Other factors, such as age, gender, time of day of use (morning and afternoon) and type of user (competitive and recreational), can also affect the probability of suffering health problems. For all of the above, using combined treatment methods as ozone and UV, or salt electrolysis produces a lower probability of perceived health problems and greater satisfaction. 相似文献
2.
This study presents the results of a web‐based questionnaire administered to 166 second language teachers and designed to obtain information about their use and needs of information and communication technologies (ICTs) as related to language learning (LL). Analyses revealed that, although teachers believe that second language acquisition is primarily driven by social interaction, they seldom use computers as a means to foster collaboration or interaction. ICTs are thought to be very helpful in individual learning scenarios but not for the interactive dimension of LL. Very few teachers incorporate interaction‐oriented digital tools in their language teaching, probably due to their self‐acknowledged deficient training in ICTs. However, instructors stated that they would like to introduce new interaction tools in their computer‐aided courses, which clearly shows the need for both teachers’ training in ICT and the technological development of proper interactive functionalities. Die Auswertung computervermittelter Technik von Zweit‐Sprachlehrern: Kollaboration und Interaktion in CALL Diese Studie zeigt die Ergebnisse einer Umfrage, die dafür entworfen wurde, Information darüber zu erhalten, die etwa Zweit Sprachlehrer verwenden, und den Bedarf an Informations‐ und Kommunikationstechniken (ICTs), die mit Sprachlernen (LL) generell verbunden sind. Analysen ergaben, dass, obwohl Lehrer glauben, dass der Erwerb einer zweiten Sprache in erster Linie von sozialer Interaktion angetrieben wird, sie selten Computer als Hilfsmittel verwenden, um Kollaboration oder Interaktion zu fördern. Es wird angenommen, dass ICTs sehr in einzelnen Lernzenarien, aber nicht für die interaktive Dimension von LL hilfreich sein kann. Sehr wenige Lehrer integrieren interaktionsorientierte digitale Werkzeuge in ihre – möglicherweise durch ihre selbstanerkannte unzulängliche Ausbildung in ICT – eigene Sprachlehre. Jedoch gaben Ausbilder an, dass sie neue Interaktionswerkzeuge in ihren computergestützten Verläufen einführen möchten. Das zeigt den Bedarf nach Ausbildung beider eindeutig: Lehrer in ICT und der technologischen Entwicklung von korrekten interaktiven Funktionalitäten. L’évaluation dela technologie informatisée chez les professeurs de langue seconde :collaboration et interaction dans l’enseignement des langues assisté par ordinateur (CALL) Cette étude présente les résultats d’une enquête conçue pour recueillir des renseignements sur la façon dont les professeurs de langue seconde utilisent et ont besoin des TICE spécifiques pour l’apprentissage linguistique. Des analyses ont révélé que les professeurs utilisent rarement les ordinateurs pour stimuler la collaboration et l’interaction et ce, bien qu’ils croient que l’acquisition d’une langue seconde est avant tout entraînée par l’interaction humaine. Ils pensent que les TICE sont très utiles dans des situations d’apprentissage individuel mais pas pour la dimension interactive de l’apprentissage des langues. Très peu nombreux sont les professeurs qui intègrent des outils numériques à orientation interactive dans leurs cours de langues, ceci étant probablement dÛ à une formation informatique déficiente qu’ils reconnaissent eux‐mêmes. Certains professeurs ont toutefois indiqué qu’ils voudraient introduire de nouveaux outils interactifs dans leurs cours assistés par ordinateur ce qui fait clairement apparaître le double besoin de formation aux TICE pour les professeurs et d’un développement technique de fonctionnalités interactives appropriées. Una evaluación de la tecnología basada en ordenadores por parte de los profesores de la segunda lengua: colaboración y interracción en aprendizaje de idiomas asistido por ordenador Esta investigación presenta los resultados de una encuesta diseñada para conseguir información sobre las necesidades específicas para el aprendizaje de lenguas y el uso de las tecnologías de la información y la comunicación (TICs) por parte de 166 profesores de segunda lengua. Los análisis han revelado que, aunque los profesores creen que la adquisición de una segunda lengua está fundamentalmente impulsada por la interacción social, en realidad hacen poco uso del ordenador para incentivar la colaboración y la interacción. Los docentes piensan que las TICs son muy útiles para la modalidad de aprendizaje individual pero no para la dimensión interactiva del aprendizaje de idiomas. Son pocos los profesores que incluyen herramientas digitales con orientación interactiva en sus cursos de idiomas, probablemente, como confiesan ellos mismos, debido a las carencias de su propia formación digital. No obstante, algunos profesores señalan que quieren introducir nuevas herramientas interactivas dentro de sus cursos asistidos por ordenador, lo que claramente demuestra la necesidad tanto de una buena formación en TICs para los profesores como del desarrollo tecnológico de nuevas funcionalidades interactivas adecuadas. 相似文献
3.
Esther Ubago-Guisado Jorge García-Unanue Jorge López-Fernández Javier Sánchez-Sánchez Leonor Gallardo 《Journal of sports sciences》2017,35(15):1484-1492
The aim of this cross-sectional study was to compare bone mass in young female athletes playing ball games on different types of playing surfaces. About 120 girls, 9–13 years of age (10.6 ± 1.5 years old Tanner I–III) were recruited and divided into prepubertal and pubertal groups. The sample represented 3 groups of athletes: soccer (N = 40), basketball (N = 40), and handball (N = 40); and 6 different playing surfaces (soccer – ground, soccer – artificial turf, basketball – synthetic, basketball – parquet, handball – synthetic, and handball – smooth concrete). Total and regional body composition (bone mass, fat mass, and lean mass) were measured by dual-energy X-ray absorptiometry (DXA). The mechanical properties of the surfaces (force reduction, vertical deformation, and energy return) were measured with the Advanced Artificial Athlete (Triple A) method. The degree of sexual development was determined using Tanner test. The pubertal group showed that soccer players on the ground, basketball players on synthetic, and handball players on smooth concrete had higher values of bone mineral content (BMC) and bone mineral density (BMD) (P < 0.05) than the soccer players on the artificial turf, basketball players on parquet, and handball players on synthetic. In conclusion, a hard playing surface, with less vertical deformation and force reduction, and greater energy return, is associated with higher levels of BMD and BMC in growing girls, regardless of the sport they practice. 相似文献
4.
Esther Ubago-Guisado Alba Gómez-Cabello Javier Sánchez-Sánchez Jorge García-Unanue Leonor Gallardo 《Journal of sports sciences》2015,33(16):1710-1718
The aim of this study was to analyse whether there are differences in bone mass in girls playing different sports. Two hundred girls (10.6 ± 1.5 years old, Tanner stages I–III) participated in the study and were divided into groups of 40 (swimmers, soccer players, basketball players, handball players and controls). Bone mineral content and bone mineral density (BMD) (whole body and hip) were measured using dual-energy X-ray absorptiometry. The degree of sexual development was determined using Tanner test, and physical activity habits were recorded through a questionnaire designed ad hoc for this research. Girls were divided by pubertal stage and the type of sport. In the prepubertal group, intertrochanteric BMD was significantly higher in both handball and soccer players compared with the control group (P < 0.05). Furthermore, in the pubertal group, total BMD, mean arms BMD, pelvis BMD, femoral neck BMD, intertrochanteric BMD and Ward’s triangle BMD were significantly higher in soccer and handball players compared with the control group (P < 0.05), and the swimmers showed significantly higher values in the mean arms BMD compared with the control group (P < 0.01). Our data suggest that sport practice during puberty, especially in activities that support the body weight, may be an important factor in achieving a high peak bone mass and improving bone health in girls. 相似文献
5.
Prosek Elizabeth A. Wei Qian Scoffone Chelsea M. Gallardo Diana Giordano Amanda L. 《International journal for the advancement of counseling》2022,44(1):64-78
College students experience a myriad of stressors in their daily lives. These stressors are associated with negative outcomes for students, both to their academics and well-being. Healthy, effective coping strategies may support students in navigating personal distress. One of the primary aspects of counselling is to help clients develop and apply such strategies. This study aimed to identify intrapersonal factors that predict types of coping strategies. Participants (N?=?416) identified as undergraduate college students attending a large public university in the southwestern United States. Results indicated that a problem-focused engagement coping strategy was associated with maladaptive factors such as shame and personal distress. Additionally, a problem-focused engagement coping strategy was predicted by potentially more helpful intrapersonal characteristics including guilt (as a motivator) and two dimensions of empathy. Finally, mean comparisons indicated statistically significant differences between identified gender and coping strategies. Implications for college counsellors are discussed.
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7.
M. Plaza-Carmona G. Vicente-Rodríguez A. Gómez-Cabello M. Martín-García J. Sánchez-Sánchez L. Gallardo 《European Journal of Sport Science》2016,16(7):877-883
Objectives: The main aim of this study was to compare the bone mass of female football players with controls of different pubertal stages. Methods: Sixty five girls aged 8–14 years (10.14?±?0.1, Tanner stages I–IV) participated in the study. Twenty participants were prepubertal (10 prepubertal control) and 45 peripubertal (15 peripubertal control). All footballers trained two days per week while the control group did not perform regular physical activity outside of school. Body composition was assessed by Dual-energy X-ray absorptiometry. Analysis of covariance was performed to evaluate differences in lean and bone masses. Results: Significant differences in lower-body extremities lean mass (LLM) between peripubertal groups were found (P?P?P?Conclusion: Female footballers showed higher bone and lean masses compared to control counterparts; these differences are already detectable at prepubertal ages and more consistent after pubertal spurt. 相似文献
8.
Alberto Encarnación-Martínez Antonio García-Gallart Ana M. Gallardo Juan A. Sánchez-Sáez. Javier Sánchez-Sánchez 《Sports biomechanics / International Society of Biomechanics in Sports》2018,17(2):251-260
The third generation of artificial turf systems (ATS) has matched the mechanical behaviour of natural grass, but today a high heterogeneity at structural level and mechanical behaviour in the new ATS also exists. The objective was to analyse the effect of the structural components of ATS football pitches and running speed on the capacity of impact attenuation. A total of 12 athletes were evaluated at three speed conditions (3.33 m/s, 4 m/s and maximum speed) on four different ATS, classifying them by their components (length of fibre, type of in-fill and sub-base). Impact attenuation was significantly higher in ATS3, characterised by longer fibre compared to other ATS with less fibre length. The ATS4 with a higher length fibre and built on compacted granular material proportioned significantly lower values in the maximum peaks of tibia acceleration. Finally, as speed increases, the peak tibia impacts were significantly higher. Longer fibre length and the capacity to accommodate a higher quantity of infill facilitate higher impact attenuation. Equally, a compacted granular sub-base is related to lower magnitude of maximum tibia peaks. Finally, the magnitude of the tibia acceleration peaks is dependent of running speed for all ATS analysed, being higher as speed increases. 相似文献
9.
Aurora Gallardo 《Educational Studies in Mathematics》2002,49(2):171-192
The work described in this article was based on a historical perspective in order to analyze the extension of the natural-number domain to the integers in students' transition from arithmetic to algebra in the context of word problems. The initial historical analysis showed the need to consider mutual interrelationships between the algebraic language and the methods of solving word problems and linear equations, for the understanding of the evolution of negative numbers. Four levels of acceptance of these numbers (subtrahend, relative number, isolated number and formal negative number) were extracted from the historical texts. The empirical analysis showed that the first three levels were observed among 35 students of 12–13 years old as well.This revised version was published online in September 2005 with corrections to the Cover Date. 相似文献
10.
The relationship between “marginal” and “mainstream” science has, in recent decades, become a matter of discussion. Traditional perspectives must be reexamined in the wake of transformations in the international circulation of knowledge and the subsequent diversification of scientific “peripherality”. Argentina represents an interesting case with which to explore the structure of “peripheral centres” and new forms of scientific development. While it has recently experienced an expansion in terms of institutionalization, professionalization, and internationalization, that process has been coupled with entrenchment of existing institutional asymmetries and persistent intra-national inequalities; academic prestige is distributed according to opposite principles of legitimation (local/international). Our main task is to explore the current state of research capacities pursuant to that expansion in order to analyze the diverse styles in which knowledge is produced. In our analysis, we make critical use of Bourdieu’s concept of field and the Latin American category of “structural heterogeneity,” while also focusing on the question of circulation. The paper outlines how professionalization has developed locally over time, and the historical tension between the National Council for Scientific and Technical Research and the public universities. It describes the current structure of the scientific field in terms of researchers, institutes, publishing circuits, and institutional evaluative cultures. It focuses on geographical asymmetries in order to assess the distribution of new human and material resources throughout the country. Finally, it addresses the current situation under the new government, and raises concern over recent regressive actions. 相似文献