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Alireza Behtoui 《British Journal of Sociology of Education》2019,40(3):340-356
Recent research demonstrates that, along with the family, the peer group and the school environment, extra-curricular activities are important contexts for young people’s educational and social development. This article is the result of a survey conducted with a sample of young people in their last year of compulsory school in Sweden and examines both who has access to the different types of extra-curricular activity and the consequences of their participation in the various programmes. As the results indicate, after controlling for respondents’ class and migrant background, their gender and their health, there are positive and significant associations between participation in certain types of activity (sporting, cultural and religious) on the one hand, and students’ school performance and educational expectations on the other. However, attendance at a less-organised activity (youth recreation centres or fritidsgård) shows a negative association with these outcomes. Furthermore, the results demonstrate that the gender, social class and migrant background of students affect their rate of participation in many of these activities. 相似文献
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The sociocultural orientation in general education, which has gradually leaked into second language teacher education, argues that teachers usually employ social relations, cultural artefacts, and theoretical concepts to mediate their thinking and practice. Against this background, the present study aimed to explore how three male Iranian English as a foreign language teachers have capitalised on the three sociocultural tools to mediate their development. The findings revealed that not all three mediational tools, though each influential in its own terms, have been available wholesale to the teachers and that different academic and teaching phases have yielded differential access to the tools. The authors indicate that during school as student, human mediation, particularly of apprenticeship, seems to be the dominant tool available for the teachers to mediate their development. Later on, in higher education institutes, although the human apprenticeship is still visible, cultural artefacts and scientific theories start to surface influencing the teachers’ learning and teaching trajectories. The implications for both teachers and teacher educators are discussed. 相似文献
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Alireza Nakhaee Mohammad Bokaeian Mohsen Saravani Ali Farhangi Azim Akbarzadeh 《Indian journal of clinical biochemistry : IJCB》2009,24(4):419-425
In traditional medicine, Eucalyptus globulus (eucalyptus) was used for the treatment of diabetes mellitus. Hyperglycemia in
diabetes has been associated with increased formation of reactive oxygen species (ROS) and oxidative damage to tissue compounds.
The aim of this study was to evaluate the effects of eucalyptus in the diet (20 g/Kg) and drinking water (2.5 g/L) on lipid
peroxidation, protein oxidation and antioxidant power in plasma and liver homogenate, as well as glycated-Hb (HbA1C) of blood in streptozotocin-induced diabetic rats for a period of 4 weeks. Diabetes induced in rats by a single intraperitoneal
injection of streptozotocin (STZ, 65 mg/Kg). At the end of the treatment period, the level of plasma glucose, plasma and liver
malondialdehyde (MDA, the main product of lipid peroxidation), protein carbonyl (PC, one of the protein oxidation products)
and HbA1C increased and ferric reducing antioxidant power (FRAP) decreased in diabetic rats compared to normal rats. Eucalyptus administration
for 4 weeks caused a significant decrease in the plasma glucose levels, plasma and liver MDA, PC and HbA1C, also a concomitant increase in the levels of FRAP in diabetic treated rats. In conclusion, the present study showed that
eucalyptus posses antioxidant activities. Eucalyptus probably restores antioxidant power, due to the improved hyperglycemia
in streptozotocin-induced diabetic rats. 相似文献
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Mehri Shahbazi Abdolhossein Farajpahlou Farideh Osareh Alireza Rahimi 《Library & information science research》2019,41(1):78-84
A credible scale based on the opinions of system users was developed to evaluate and assess data quality in automated library systems (ALS). Development and testing were carried out in two stages. In the first stage, 77 dimensions for data quality which had been previously identified through a systematic literature review were used to develop scale items. The first draft of the scale was then distributed among a target population of ALS experts to solicit their opinions on the scale and the items. In the second stage, a revised version of the scale was distributed among the main study population, which included end users of the target systems. This stage used factor analysis to determine the final draft of the scale, which consists of 4 factors and 62 items. The 4 factors were named after the qualities of their associated items: Data Content Quality, Data Organizational Quality, Data Presentation Quality, and Data Usage Quality. This scale can help system managers identify and resolve potential problems in the systems they manage and can also aid in evaluating the quality of data sources based on the opinions of end users. 相似文献
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Neda Nasiri Ahmad Fakharian Mohammad Bagher Menhaj 《Journal of The Franklin Institute》2021,358(10):5185-5212
This paper presents a novel combined State Dependent Riccati Equation (SDRE) / Function Approximation Technique (FAT)-based control design for nonlinear uncertain systems. The SDRE is employed to construct an optimal controller and the function approximation technique is utilized to estimate time-varying disturbances and uncertainties. Moreover, a robust term in the proposed control law compensates for the truncation error. The closed-loop stability and boundedness of the tracking error and FAT weights approximation error are proved in the sense of Lyapunov, with consideration of truncation error. Due to the great importance of the adequate performance of transient response from practical point of view, performance evaluation has been accomplished. The proposed scheme is computationally simple due to utilizing the FAT to represent uncertainties and disturbances as a function of time. Compared with the SDRE based SMC, the proposed controller is superior in terms of capability to track a fast and highly complicated trajectory and no need to determine time-varying disturbances and uncertainties bounds. The case study is a Selective Compliant Articulated Robot for Assembly (SCARA) flexible joint manipulator as a representative of highly nonlinear, coupled, large robotic systems. Simulation results easily verify the effectiveness and superiority of the proposed controller. 相似文献
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Based on Bourdieu’s conceptualization of social capital (the social stratification perspective), this study examines the impact of social capital on the educational outcomes of young people in Sweden, with a focus on the extra-familial aspect of social capital – that is, social capital generated by parental networks and active membership in various social organizations and friendship networks. The results indicate that the class background of respondents is the main predictor of access to all three forms of extra-familial social capital. However, after controlling for class background, the children of racialized immigrant groups are more likely to have access to more types of social capital than others. All three aspects of extra-familial social capital positively influence the educational performance of pupils. 相似文献
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