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采用文献资料、理论分析、逻辑推理法等对近10年来竞技体育后备人才培养模式的现状进行研究,肯定了竞技体育后备人才培养模式研究中的成绩,指出存在的问题,并分析了今后竞技体育后备人才发展趋势。 相似文献
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Da Silva RP Mündel T Natali AJ Bara Filho MG Alfenas RC Lima JR Belfort FG Lopes PR Marins JC 《Journal of sports sciences》2012,30(1):37-42
In this study, we assessed the pre-game hydration status and fluid balance of elite young soccer players competing in a match played in the heat (temperature 31.0 ± 2.0 ° C, relative humidity 48.0 ± 5.0%) for an official Brazilian soccer competition. Fluid intake was measured during the match, as were urine specific gravity and body mass before and after the game to estimate hydration status. Data were obtained from 15 male players (age 17.0 ± 0.6 years, height 1.78 ± 0.06 m, mass 65.3 ± 3.8 kg); however, data are only analysed for 10 players who completed the full game. The mean (± s) sweat loss of players amounted to 2.24 ± 0.63 L, and mean fluid intake was 1.12 ± 0.39 L. Pre-game urine specific gravity was 1.021 ± 0.004, ranging from 1.010 to 1.025. There was no significant correlation between sweat loss and fluid intake (r = 0.504, P = 0.137) or between urine specific gravity and fluid intake (r = -0.276, P = 0.440). We conclude that young, native tropical soccer players started the match hypohydrated and replaced about 50% of the sweat lost. Thus, effective strategies to improve fluid replacement are needed for players competing in the heat. 相似文献
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Catari Vilela Chaves Soraia Schultz Martins Carvalho Leandro Alves Silva Tânia Cristina Teixeira Patrícia Bernardes 《Research Policy》2012,41(9):1683-1695
The purpose of this paper is to analyze the interactions between firms, universities and research institutes based in Minas Gerais, Brazil. The theoretical standpoint is the innovation system of developing countries. Multivariate cluster analysis is used, more specifically, the Grade of Membership method, to group firms with similar characteristics and evaluate their pattern of interaction with universities and research institutes. The main results show that the highest rates of interaction are found among firms that manufacture chemical products, cellulose, paper and paper products, followed by those engaged in the extraction of metallic and non-metallic minerals. 相似文献
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Elzo Alves Aranha Paulo Henrique dos Santos Neuza Abbud Prado Garcia 《Educational technology research and development : ETR & D》2018,66(6):1571-1599
Academic papers on entrepreneurship in engineers’ education have been growing in the last decades. However, studies on entrepreneurship in engineering have not sought to analyze how entrepreneurship education, in connection to active learning, design thinking, and Bloom’s Taxonomy, inserted in an integrated way, as a tool, might help the process of engineering students’ entrepreneurial skills development. Thus, this study has the goal to propose an integrated tool, linked to the principles of entrepreneurship education, active learning, design thinking, and Bloom’s Taxonomy, to foster engineering students’ entrepreneurial skills development. The tool, called Entrepreneurial Dynamic Learning, is operationalized and validated in a 2-year case study in a Brazilian public university. The study also produces practical implications, and five are highlighted: (1) at the level of governments and policy makers; (2) engineering scientific associations; (3) universities, coordinators, and professors of engineering undergraduate programs; (4) engineering education researchers; and (5) the Brazilian National Confederation of Industry. 相似文献
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Rochelle Rocha Costa Carmen Pilla Adriana Cristine Koch Buttelli Michelle Flores Barreto Priscila Azevedo Vieiro Cristine Lima Alberton 《Research quarterly for exercise and sport》2018,89(2):173-182
Purpose: This study aimed to investigate the effects of water-based aerobic training on the lipid profile and lipoprotein lipase (LPL) levels in premenopausal women with dyslipidemia. Method: Forty women were randomly assigned to: aquatic training (WA; n = 20) or a control group (CG; n = 20). The WA group underwent 12 weeks of water-based interval aerobic training twice a week at intensities ranging from 9 to 15 on the Borg Scale of Perceived Exertion. Total cholesterol (TC), triglycerides (TG), high- (HDL) and low- (LDL) density lipoprotein, TC/HDL ratio, LPL levels, and peak oxygen consumption (VO2peak) were evaluated before and after 12 weeks in both groups. Results: The WA group elicited decreases in TC (9%; effect size [ES] = 0.69; 95% CI [0.05, 1.33]), LDL (16%; ES = 0.78; 95% CI [0.13, 1.42]), and the TC/HDL ratio (17%; ES = 1.13; 95% CI [0.46, 1.79]), as well as increases in VO2peak (10%; ES = 0.64; 95% CI [0.002, 1.27]) and HDL (10%; ES = 0.28; 95% CI [?0.35. 0.90]), without significant changes in TG (ES = 0.16; 95% CI [?0.46, 1.79]) and LPL (ES = 0.36; 95% CI [?0.27, 0.98]) levels. In the CG, no statistically significant changes in any of these variables were found (TC, ES = 0.19, 95% CI [?0.43, 0.82]; LDL, ES = 0.22, 95% CI [?0.40, 0.85]; HDL, ES = 0.05, 95% CI [?0.57, 0.67]; TG, ES = 0.09, 95% CI [?0.53, 0.71]; TC/HDL ratio, ES = 0.20, 95% CI [?0.42, 0.82]; LPL, ES = 0.02, 95% CI [?0.60, 0.64]; VO2peak, ES = 0.20, 95% CI [?0.42, 0.82]). Conclusion: Water-based interval aerobic training positively affected the lipid profile in premenopausal dyslipidemic women. 相似文献
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As job markets have been polarizing, firms have been changing their labor inputs. By using matched employer–employee data for Portugal, we examine whether labor market polarization has occurred within or across firms and how labor input upgrades have contributed to overall productivity growth. We develop a firm taxonomy based on worker's occupational data. Firms can be focused on one task – Abstract, Manual or Routine – on a combination of tasks, or none. Results show that Abstract firms are the most productive and their share has increased over time. Manual firms, the least productive, have had a stable share throughout the period. Routine firms have seen their share decline over time. The dynamic decomposition of the estimated productivity reveals that productivity growth is propelled by increased market shares of the most productive incumbents and exiting of the least productive, especially for Abstract firms. Notwithstanding these productivity growth drivers, they fail to avert the productivity stagnation observed in Portugal between 2004 and 2009 due to the overall decline in productivity of incumbent firms, especially Routine. We discuss the policy implications of our results which are relevant to other European economies also lagging behind in terms of knowledge and innovation capabilities. 相似文献
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