排序方式： 共有39条查询结果，搜索用时 31 毫秒
31.
Maïmoun L Simar D Caillaud C Peruchon E Sultan C Rossi M Mariano-Goulart D 《Journal of sports sciences》2008,26(3):251-258
We examined the effects of antioxidant supplementation in association with progressive aerobic training on the bone metabolism of healthy elderly individuals. For 8 weeks, 13 participants (mean age 74 years) received vitamin C (500 mg) and vitamin E (100 mg) daily and participated in a supervised progressive aerobic training programme. After the 8 weeks, 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D concentrations were increased significantly by 42.8% (P < 0.001) and 26.8% (P < 0.01) respectively, while parathyroid hormone concentration was decreased by 17.5% (p < 0.05). Of the bone markers, only bone alkaline phosphatase decreased, by 14.6% (P < 0.05). No variation was observed for ionized calcium, insulin-like growth factor-1 or insulin-like growth factor binding protein-3. Our findings suggest that 8 weeks of combined antioxidant supplementation and aerobic training modified vitamin D metabolism and parathyroid hormone concentration. These adaptations might counterbalance the unfavourable hormonal profile frequently observed in the elderly that predisposes them to accentuated age-related bone loss. 相似文献
32.
Distributed leadership applications in high schools in the State of Kuwait from teachers’ viewpoints
Sultan Ghaleb Aldaihani 《International Journal of Leadership in Education》2020,23(3):355-370
ABSTRACTThis study aims to identify different applications of distributed leadership at high schools in the State of Kuwait from teachers’ perspectives. These applications include the supervision process, delegation of authority, school development, decision making and community partnership. A quantitative design has been employed, and data has been collected through questionnaires that included five main dimensions. The study sample consisted of 1210 high school teachers at six educational areas in Kuwait. The degree of practicing distributed leadership in Kuwaiti schools was low. The degrees of application related to distributed leadership in the supervision process and delegation of authority were medium. However, the degrees of application related to distributed leadership in the development of school, decision making and community partnership were also low. The study has concluded that training programs are needed for school leaders in Kuwait. 相似文献
33.
A model for measuring output of university departments is developed. The model includes teaching, research and other activities. The weighting factors for each activity is given. The model is applied to the departments of the College of Commerce of Kuwait University. Discussions and recommendations are presented. 相似文献
34.
Ahmet Kilinc Thomas Kelly Baris Eroglu Umit Demiral Tezcan Kartal Arzu Sonmez Mehmet Demirbag 《International Journal of Science and Mathematics Education》2017,15(2):195-213
For science teachers using the discourse of socioscientific issues (SSI), it is important to make a decision as to whether when and how to disclose their own positions. The existing limited literature shows that science teachers prefer one of four roles during SSI discourse: sticker to facts, imposer, democracy advocator, and committed impartialist. The purpose of the present research is to understand the nature of preservice science teachers’ (PST) beliefs underlying such selection. Based on existing literature, we developed a teacher’s belief questionnaire including vignettes representing four teacher’s roles in discussion of genetically modified (GM) foods. Three hundred twenty-four (324) PSTs from a Turkish context experiencing SSI-based reforms completed these questionnaires, selected one of the teacher’s roles, and justified their selection by writing reasons. Content analysis procedures were used in data analysis of this qualitative study. The results show that most PSTs selected dialogical roles (democracy advocators and committed impartialists). Looking at their beliefs, epistemologies and teaching goals work together in PSTs’ selection of their preferred role. In addition, we argue that there is no desired alignment between teachers’ existing beliefs and expectations of SSI reforms. We conclude by indicating certain implications that may enhance such alignment. 相似文献
35.
剑桥大学教育技术应用研究中心CARET建成于2001年,主要致力于研究对教学、科研的支持技术.我们为单个的教师、管理者、学生以及整个系的教学提供软件,并且支持他们将想法变成现实. 相似文献
36.
Science & Education - The purpose of the present study was to understand the nature of the link between science teachers’ epistemologies and their socioscientific issue (SSI) teaching... 相似文献
37.
Al-Rahmi Ali Mugahed Al-Rahmi Waleed Mugahed Alturki Uthman Aldraiweesh Ahmed Almutairy Sultan Al-Adwan Ahmad Samed 《Education and Information Technologies》2022,27(6):7805-7826
Education and Information Technologies - Mobile-learning (M-learning) apps have grown in popularity and demand in recent years and have become a typical occurrence in modern educational systems,... 相似文献
38.
Physical activity (PA) is important in ensuring a healthy population. It is dependent on various socio-demographic (SD) factors, such as age, gender, employment and marital status. A limited number of studies have investigated the relationship between SD factors and PA but research exploring this relationship from the perspective of gated and non-gated neighbourhoods is scarcer. Therefore, the objective of this study is to investigate the relationship between SD factors and PA variables in gated and nongated neighbourhoods in Karachi Pakistan. Results of the independent sample t-test and Pearson chi-square showed that young and single people do more sports activities in gated neighbourhoods. Women, unemployed people and public transport users walk more in non-gated neighbourhoods. In conclusion, future neighbourhoods should have more pedestrian friendly areas and a larger number of PA facilities, rather than building more walls and gates. 相似文献
39.
This article explores the major differences and similarities between Six Sigma and human performance technology or human performance improvement (HPT or HPI). It addresses the definitions and foundations of both Six Sigma and HPT as major performance improvement approaches. It explains how their methodologies are similar in some aspects and different in others. It compares the popularity and applicability of the two approaches in both small and large companies. It discusses the psychological elements underlying each method. Moreover, it considers the criteria of success in managing HPT and Six Sigma projects. It also addresses the reasons for the similarities and differences between the two processes and suggests an integrated approach that focuses on both human and nonhuman improvement in an attempt to overcome the limitations of each approach. 相似文献