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51.
Vanesa España Romero Jonatan R. Ruiz Francisco B. Ortega Enrique G. Artero Germán Vicente-Rodríguez Luis A. Moreno 《Journal of sports sciences》2013,31(5):469-477
Abstract The aim of this study was to compare equations for estimating percentage body fat from skinfold thickness in elite sport climbers by assessing their agreement with percentage body fat measured using dual-energy X-ray absorptiometry (DXA). Skinfold thickness was measured in a convenience sample of 19 elite sport climbers [9 women and 10 men; mean age 31.2 years (s = 5.0) and 28.6 years (s = 3.6), respectively]. Percentage body fat was estimated using 17 different equations, and it was also measured by DXA. A significant inter-methods difference was observed for all equations, except for Durnin's equation in men (inter-methods difference: ?0.57% and ?0.29%; 1.96 s: 5.56 and 5.23 for Siri's and Brozek's equation, respectively) and women (inter-methods difference: ?0.67% and ?1.29% for Siri's and Brozek's equation, respectively), and for Wilmore's equation using Siri's body fat equation in women (inter-methods difference: ?1.86%). In women, the limits of agreement were lower when using Durnin's equation compared with Wilmore's equation (1.96 s: 3.86% and 5.13%, respectively). In conclusion, of the 17 studied equations, Durnin's equation was the most accurate in estimating percentage body fat in both male and female elite climbers. Therefore, Durnin's equation could be used to assess percentage body fat in elite sport climbers if more accurate methods are not available. The generalizability of the results is limited by the fact that the sample was not selected at random. 相似文献
52.
Enrique Pieck 《International Journal of Lifelong Education》2013,32(5):419-429
The aim of this article is to talk about the possibilities of work‐related adult education programmes within the context of developing countries. The focus of the analysis is on poor populations, particularly those dwelling in rural and marginal urban areas. The background comprises the challenges for productive incorporation, social exclusion, the relative absence of skill development programmes in these areas and the historical ineffectiveness of adult education programmes. In the light both of lessons drawn form several experiences carried out mainly in developing countries and insights coming from educational and developmental research, the article puts forward some theses that may serve as guidelines when carrying out work‐related adult education programmes, such as the need to stem from integral and inter‐institutional perspectives, to rely on sound strategies that can have a direct impact on both social and economic development, to learn from local contexts (knowledge and opportunities) and evaluate the potential within these spaces, to properly assess the different areas (health, housing, organization etc.) that are related to any social development process, and the importance of taking productive activities—work—as the axis and starting point of programmes. 相似文献
53.
Enrique Berjano Laura Sales-Nebot Albert Lozano-Nieto 《European Journal of Engineering Education》2013,38(2):121-130
This hypothesis is based on the fact that oral presentations in the context of engineering education could be used not only to develop oral communication skills but also to augment the professionalism in the curriculum. The methodological innovation is first described, which allows encouraging the capacity of summarising ideas, teamwork, assertiveness, listening skills and constructive criticism. Second, the preliminary results from two pilot groups of students during two academic years are analysed. Finally, the paper reflects on the possibilities of expanding this method to pre-university studies. 相似文献
54.
Marcos Gutiérrez-Davila Carmen Gutiérrez-Cruz Enrique Navarro 《European Journal of Sport Science》2017,17(8):1004-1012
The objectives of this study were to investigate the effect that the presence of two stimuli that require two different responses (dual-attention) has both, on offensive reaction-response time to a light stimulus, and on defensive response time when the stimulus is a real fencing attack. Twenty-five elite fencers and a fencing master were included in the study. The equipment included four force plates adapted to a scaffold that served as a fencing piste. Two force plates were placed, at the start position, under the fencer’s feet and another two plates were placed under the master’s feet. The results demonstrate that choice reaction time to visual stimuli increases in dual-task conditions with respect to simple reaction time, whereas the mean horizontal force tends to decrease in dual-task. However, when the stimulus was an opponent’s movement, dual-task conditions did not have any effect on the time required to initiate a defensive action. The changes in reaction time when real movements were used as stimuli challenge the validity of the reaction time to visual stimuli paradigm as a predictor of performance in fencing. Also, the results obtained demonstrate that perceptual and attentional processes play a major role in fencer performance in real competition. 相似文献
55.
Enrique Jacoby Santiago Cueto Ernesto Pollitt 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1999,45(1):27-43
In the rural Andes of Peru, primary school inefficiency ranks higher than in the rest of the country, with a nearly 50 per cent rate of first grade repetition. In 1993 the investigators administered a battery of four psycho-educational tests to 360 schoolchildren in the fourth and fifth grades at ten primary schools in the Andean region of Huaraz. They also recorded the children's individual characteristics, i.e. family background, nutritional status, and educational attainment, and rated the schools according to educational features such as classroom size, time devoted to learning, and student-teacher ratio. A year later, in 1994, children were re-examined in the schools using the same test battery. All subjects were small for their age, had poor diets, spoke mostly Quechua at home (Spanish in school), lived in a rural environment, and walked considerable distances to school. Regression analyses of the 1993 data indicated that the performance of Quechua children on verbal tests was heavily influenced by family background, while their mathematical competence was related to school experience. On the other hand, improvement in test scores from one year to the next appeared to be strongly related to test performance in 1993 and less clearly to the other recorded variables. Finally, the schools' promotion rates were clearly associated with test scores from the previous year but less clearly with grade repetition rates. 相似文献
56.
Activity profile of top-class association football referees in relation to fitness-test performance and match standard 总被引:1,自引:1,他引:0
The aim of this study was to examine the kinematic activity profiles, cardiovascular responses and physical fitness of top-class football referees (n=11) during the FIFA Confederations Cup 2005. Computerised match-analyses (n=9) were performed with a two-dimensional photogrammetric video system, and the cardiovascular demand imposed on the referees (n=12) was measured using heart rate recordings. Total distance covered was 10,218, s=643 m of which 3531, s=510 m was covered at high intensities (>3.6 m.s(-1)). Both total distance covered (r2=0.59; P=0.02) and high-intensity activities (r2=0.44; P=0.05) were related to the distance covered by the ball in the same match. The referees ran at high speed 37% further (P=0.01) in the actual tournament than during under-17 top-level officiating. After the 5-min interval during which high-speed running peaked, in the following 5 min the performance was reduced by 19% (P=0.01) in relation to the mean of the game. Mean heart rate was 161, s=9 b.min(-1) (86, s=3% of maximal heart rate (HRmax)). Mean heart rate (expressed as percentage of HRmax) was related in part (r2=0.36; P<0.01) to the number of high-intensity activities performed in the same 5-min interval. The results of this study show that: (1) kinematic activity profiles of top-class referees can be influenced by the distance covered by the ball; (2) the amount of high-speed running (>5 m.s(-1)) best describes the physical performance of referees; (3) heart rate recording can be a useful tool to determine the most intense periods of a match and (4) the new fitness tests adopted by FIFA were poor predictors of match activities. 相似文献
57.
William W. Brickman Willy Strzelewicz William Taylor Joachim H. Knoll Mark Blaug Oskar Anweiler Andreas Fuchs Gilda L. de Romero Brest Alberto Aráoz Wolfgang Brezinka Enrique Oteiza W. F. Connell Robert J. Havighurst Daniel F. Wozniak Wolfgang Roth Karl Frey Alfons Otto Schorb 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1970,16(2):221-249
58.
59.
Valarie L. Akerson Khemmawadee Pongsanon Meredith A. Park Rogers Ingrid Carter Enrique Galindo 《International Journal of Science and Mathematics Education》2017,15(2):293-312
This study explored a modified version of Japanese Lesson Study to determine whether and how it influenced preservice elementary teachers in their abilities to deliver science lessons that included nature of science (NOS) to their own students. We used a case study approach that focused on one subset of a cohort of preservice elementary teachers within their field placement settings. Data sources included lesson plans, lesson feedback forms, videotapes of delivered lessons, and videotapes of lesson study feedback sessions. Early in the semester peers provided feedback on content, and later in the semester peers provided feedback on classroom management as well as content during the lesson study feedback sessions. We found that preservice elementary teachers were able to provide feedback to their peers regarding how to include NOS in their science lessons, yet did not naturally included NOS connections within their own lessons. 相似文献
60.
Enrique González Torres 《Prospects》1974,4(4):480-485
The first article of our autumn issue of 1973 (Vol. III, No. 3) entitled Should One Develop Nonformal Education was a large extract of a report1 by Philip H. Coombs and his colleagues at the International Council for Educational Development (ICED) to Unicef. The Mexican group, Fomento Cultural y Educativo, A. C., which offers us here its thoughts on the report, is concerned with planning and introducing new educational models.The members of the discussion group were Eduardo Lastra, Vicente Arredondo, Ernesto Camou and Enrique González Torres. 相似文献