Desaturation Patterns Detected by Oximetry in a Large Population of Athletes     

Raul P. Garrido-Chamorro  Marta González-Lorenzo  Jose Sirvent-Belando  Cristina Blasco-Lafarga  Enrique Roche 《Research quarterly for exercise and sport》2013,84(2):241-248

Optimal exercise performance in well trained athletes can be affected by arterial oxygen saturation failure. Noninvasive detection of this phenomenon when performing a routine ergometric test can be a valuable tool for subsequent planning of the athlete's training, recovery, and nutrition. Oximetry has been used to this end. The authors studied 339 athletes performing a similar exercise trial under well controlled environmental conditions. Maximum speed, oxygen uptake, and heart rate levels were simultaneously measured. From the obtained data, six patterns were found: (a) athletes in whom oxygen saturation is constant (≥ 95%) during test execution; (b) athletes displaying a progressive desaturation with incremental exercise intensities; (c) athletes presenting a transient desaturation in the anaerobic threshold region; (d) athletes starting with a mild-to-moderate desaturation at the beginning of the test, but reaching normal saturation values at the end; (e) athletes displaying mild-to-moderate desaturation levels throughout the whole test; and (f) athletes displaying a transient desaturation in the anaerobic threshold region and a new desaturation at the end of the test. In conclusion, it is believed that establishment of desaturation patterns by validated oximetry could be a first approach to evaluate the adaptation of the cardiorespiratory system to exercise intensity, helping to improve results.  相似文献   

Engaging with parents: the relationship between school engagement efforts,social class,and learning     

Raquel L. González  Cara L. Jackson 《School Effectiveness & School Improvement》2013,24(3):316-335

Using data from the U.S. Department of Education's (2000) Early Childhood Longitudinal Study, Kindergarten Class of 1998–99 (ECLS-K), this study investigates the relationship between school efforts to engage parents, average socioeconomic status (SES) of families within a school, and kindergarteners' end-of-year reading and mathematics achievement. Drawing from Epstein's (2001 Epstein, J.L. 2001. School, family, and community partnerships: Preparing educators and improving schools, Boulder, CO: Westview Press.  [Google Scholar]) parent involvement framework, the 4 types of engagement efforts explored are intended to promote communication, parent volunteering, parent influence in school decision making, and parenting skills. We apply multilevel methods to explore the impact of schools' efforts to engage parents on student achievement. Our findings indicate certain types of school efforts to engage parents influence achievement. Depending on average school SES, efforts to promote volunteering has a differential impact on reading achievement, efforts to involve parents in school decision making has a differential impact on mathematics achievement, and efforts to increase communication and promote parenting skills have a differential impact on reading and mathematics achievement.  相似文献   

How do doctoral students experience supervision?     

Gabriela González-Ocampo  Montserrat Castelló 《Studies in Continuing Education》2013,35(3):293-307

Supervision has been shown to have a high impact on doctoral students' development. However, little is known about how students perceive not only negative but also positive doctoral experiences, as well as their strategies for dealing with perceived problematic situations. The aim of this study is to analyse and relate doctoral students' significant supervision experiences to the strategies they use to cope with these experiences when they perceive them as challenging or negative. A total of 1173 doctoral students from different research-intensive Spanish universities responded to four open-ended questions about their most significant experiences in their doctoral journey, associated feelings and strategies to deal with them. We identified a total of 223 experiences related to supervision that were distributed into five categories: 1) central prerequisites for supervision, 2) supervisor choice, 3) supervision of the research process, 4) coaching and 5) project management. The results showed three distinct ways, as reported by the students, of handling the perceived negative supervision experiences: 1) no strategy, 2) local strategy and 3) regulatory strategy. The results suggest that analysing both positive and negative experiences may better capture variability in students' supervision experiences. A relation between experiences with supervision and students' satisfaction was also detected.  相似文献   

Memoria incidental e intencional en preescolares     

Miguel Angel González  Francisco Valle 《Infancia y Aprendizaje》2013,36(27-28):223-235

Resumen

En general, se ha mantenido que los niños en edad preescolar recuerdan mejor en tareas de aprendizaje incidental que en las de aprendizaje intencional. En este estudio se ha reexaminado esta cuestión y se ha visto que no existe tal diferencia. Niños de 3 a 5 reconocieron de modo semejante una serie de objetos y dibujos, tanto si se les había advertido previamente que debían recordar como si no. El estudio ha demostrado asimismo, y en concordancia con otros trabajos, que el recuerdo no es independiente del nivel de conocimiento ni de la edad del niño. En virtud de estos resultados se hace una interpretación de la memoria infantil acorde con la teoría de los niveles de procesamiento.  相似文献   

Ideas,interacción,ambiente educativo y desarrollo: informe preliminar     

Jesús Palacios  María del Mar González  María del Carmen Moreno 《Infancia y Aprendizaje》2013,36(39-40):159-169

Resumen

Se presenta en este trabajo un informe preliminar de una investigación longitudinal en la que las ideas evolutivo-educativas son evaluadas a lo largo del tiempo y se ponen en relación con las interacciones que 70 parejas (maridos y esposas) desarrollan con sus hijos de alrededor de 22 meses en situaciones diversas; se analiza también la relación con la estructuración del entorno físico y social del hogar, así como con el desarrollo del niño. Se han encontrado relaciones positivas entre las diferentes clases de padres definidos por sus ideas y las variables dependientes examinadas (contenidos de las interacciones, estimulación del hogar, desarrollo del niño).  相似文献   

Metaphor use in a specific genre of engineering discourse     

Ana María Roldán-Riejos  Paloma úbeda-Mansilla 《European Journal of Engineering Education》2006,31(5):531-541