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631.
José-María Madariaga-Orbea Iratxe Gillate Alex Ibañez-Etxeberria Begoña Molero 《Cultura y Educación》2018,30(3):584-599
The objective of this study is to analyse differences in motivation and social self-concept in students participating in three different programmes of heritage education in informal contexts. A total of 667 secondary school students from the mining and industrial area of Bizkaia participated in the study. The results show differences in motivation between experimental and control groups before and after their participation in the inter-generational programme. Differences were also found in social self-concept after participation in the inter-generational programme and a follow-up class, after participation in the Dolores Ibarruri programme and after visiting the Mining Museum. With regard to gender, no differences are found in motivation either before or after participation, although differences are found in favour of females in social self-concept. 相似文献
632.
Juan Manuel Niño 《International Journal of Leadership in Education》2018,21(3):267-283
This qualitative study seeks to create a better understanding of the work of school superintendents. This study was conducted using ethnographic techniques as a way to describe the practice of a Latino superintendent in a borderland community in south Texas. Guiding questions for this study were: What goes on in the workday life of a superintendent? and how does the superintendent enact his role as superintendent? Field study for this qualitative inquiry occurred over a period of seven months. Data for this study, including transgressive data, were collected primarily through participant observations, semi-structured ethnographic interviews, from artefacts and journal notes. 相似文献
633.
634.
The consensus problem for networks of multiple agents consists in reaching an agreement between certain coordinates of interest using a distributed controller. It may be desirable that all the agents find a consensus at a given desired leader coordinate (Leader Follower Consensus Problem LFCP), or it may be only necessary that they agree at a certain coordinates value (Leaderless Consensus Problem LCP). Consensus has many practical applications in robot networks systems, where the interconnection of the agents may present variable time delays, hence rendering the stability analysis and control design more complex. Another problem that may arise is the possible lack of velocity measurements. In this work, a Proportional plus damping injection (P + d) controller together with a linear velocity observer is introduced. Our approach is able to solve both the LFCP and the LCP in networks of robots modeled as undirected weighted graphs with unknown asymmetric (bounded) variable time delays. Local (semi global) asymptotic stability is proven and simulation results are provided to test the performance of the proposed scheme. 相似文献
635.
Iván Peña-González Jaime Fernández-Fernández Manuel Moya-Ramón Eduardo Cervelló 《Research quarterly for exercise and sport》2018,89(3):373-379
Purpose: The talent identification and selection process in young male soccer players is mainly focused on anthropometrics and physical performance, but social factors are also considered in this process. The purpose of this study was to test the existence of the relative age effect and its possible influence on anthropometrics and physical performance and to analyze coaches’ efficacy expectations. Method: Data for 564 young male soccer players (Mage = 13.7 ± 1.5 years; Mweight = 53.7 ± 11.6 kg; Mheight = 160.2 ± 11.6 cm) included their birth quartile, maturity status, anthropometrics, a physical test battery, and coaches’ efficacy expectations. Results: Early-born players were overrepresented (p < .05). Early-born players were not statistically taller, heavier, or better at physical performance (p > .05) when maturation and chronological age were controlled as confounding factors. However, coaches expected more from early-born players (p < .05), and the inferential analysis showed likely to very likely worthwhile differences between the coaches’ expectations for players born in the first quartile of the year and those born in the fourth quartile of the year. Conclusions: Anthropometrical and physical performance variables were not affected by birth quartile, and coaches’ efficacy expectations were related to the relative age effect. 相似文献
636.
Katya Vargas-Ortiz Victoriano Pérez-Vázquez Arturo Figueroa Francisco J. Díaz Paulina G. Montaño-Ascencio 《European Journal of Sport Science》2018,18(2):226-234
In recent years, prevalence of obesity in children and adolescents has increased. A strategy for prevention and management of obesity is aerobic training (AT) due to its effectiveness to decrease fat mass. AT increases the content of SIRT3, a mitochondrial protein that increases the expression of PGC-1α and NFR1, thereby enhances mitochondrial function and metabolic health. Resistance training (RT) provides metabolic benefits but its effect on SIRT3 content is unknown. To compare the effect of AT and RT on SIRT3, PGC-1α and NRF-1 protein levels in skeletal muscle of sedentary obese adolescents. Twenty-seven sedentary obese male adolescents (age: 16.7?±?0.9 years; BMI: 33.7?±?4.3?kg/m2) completed a 1-month control period prior to randomization to one of two supervised exercise protocols: AT (3 days/week, 40 min/day, 70–80% peak heart rate) or RT (3 days/week, 11 exercises, 2 sets/exercise, 12 repetitions/set) for 12 weeks. Biopsies were obtained from the vastus lateralis muscle before and after 12 weeks to analyse SIRT3, PGC-1α and NRF-1 proteins content. Peak oxygen consumption (VO2peak) and anthropometric variables were evaluated before and after training. AT increased SIRT3 content, which was associated with improvements in PGC-1α content and body fat percentage. RT did not affect SIRT3 or PGC-1α. VO2peak increased only in AT. The increase in muscle mitochondrial SIRT3 was observed only following AT. In contrast, RT increased muscle mass without improving SIRT3 in obese male adolescents. 相似文献
637.
638.
Zenaida Aguirre-Muñoz Anastasia A. Amabisca 《Journal of Education for Students Placed at Risk》2013,18(3):259-278
Past research demonstrates the critical role of the context of learning in the achievement of students. This body of work justifies research and development of more contextualized opportunity to learn (OTL) models. We expound on an OTL framework that represents contextual features that can enrich or constrain opportunities for English language learners (ELLs). Specifically, we aim to broaden the conception of OTL beyond exposure to content and begin to define the types of affordances ELLs should be provided to achieve content standards. A central argument is the integration of academic language instruction as an OTL component for examining ELL achievement. 相似文献
639.
Rosario Ordoñez-Jasis Susana Y. Flores Pablo M. Jasis 《Journal of Early Childhood Teacher Education》2013,34(1):4-19
It is well documented in the literature that early pre-K reading experiences prepare children for the benefits of formal literacy instruction in the later grades. This is particularly true for young children from nonmainstream backgrounds. The objective of this article is to share the findings of a 4-year qualitative study investigating the relationships forged and teaching ideologies constructed by Latino pre-K teachers via critical “storying” within a culturally responsive professional learning community. Findings suggest that as teachers learned to recognize, listen to, and learn from the personal/professional individual and collective life histories of each other, their teaching efficacy was enhanced increasing their ability to develop effective literacy instruction that was culturally and linguistically responsive to the needs of young children. 相似文献
640.
Amelia Mañá 《Cultura y Educación》2013,25(1):184-202
AbstractThis paper is a review of studies about processes and secondary school students’ difficulties with these processes when they use information to answer questions. The PISA program uses this kind of task-oriented reading situation to evaluate reading literacy, which is also a common reading situation in educational settings. Four key strategies are identified to successfully perform this kind of task: decide how to read the information, comprehend the task, decide when to search for information in order to solve the task, and self-regulate that search process. Moreover, this paper provides accurate information about the students’ difficulties in becoming skilled readers when they use information to answer questions. This information might help teachers and educational counselors in the design of interventions to improve reading literacy in schools. 相似文献