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Reza Gholami 《British Journal of Sociology of Education》2017,38(6):798-811
Taking the English National Curriculum as its main example, this article argues that an overly nationalistic, normative and ‘fact-based’ citizenship education curriculum is failing to engage the dimensions of young people’s identities which they experience as deeply meaningful. There is thus a chasm – albeit a false one – between official discourses and pedagogies of citizenship and what young people consider to be their ‘real’ selves. I argue that citizenship education must develop a more sophisticated understanding of the complexities of how identities are formed and performed, especially in light of globalisation and increasing migration. I also make a somewhat unorthodox argument for conceptualising ‘relating-to-otherness’ in the same way that we think of music consumption. This has implications for how we experience, interpret, value and create ‘others’. The article also makes some recommendations for how these ideas can begin to be implemented in educational settings. 相似文献
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The present study focused on the epistemology of teachers’ practical knowledge by addressing the following research question: how do teachers attempt to reason about their practices and their practical knowledge? The results indicated that teachers supported their practical knowledge claims using the “practical argument”. Within this conceptual framework, they relied on contextual grounds that call for the fact that something should or should not be “done”, rather than something is “true” or “false”. Contextual grounds, then, were found to be backed up by two significant types of warrants: moral ethos, and “what works” notion. Depending on what kind warrants they used, teachers’ practical knowledge was interpreted to be based on two different epistemic statuses: “practicable” knowledge and “praxial” knowledge. 相似文献
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Abdorrahim Absalan Javad Mohiti-Ardakani Hossein Hadinedoushan Mohammad Ali Khalili 《Indian journal of clinical biochemistry : IJCB》2012,27(4):351-356
Cinnamon has been used as an anti-diabetic agent for centuries but only in recent few years its mechanism of action has been under investigation. Previous studies showed that cinnamon might exert its anti-diabetic effect via increasing glucose transporter isotype-4 (GLUT4) gene and glycoprotein contents in fat cells. To study if hydro-alcoholic cinnamon extract (HACE) enhances GLUT4 translocation from intracellular compartments of nuclear or endoplasmic reticulum membranes (N/ER) into the cytoplasmic membrane (CM). C2C12 myoblastic cell line were seeded in DMEM plus 20 % FBS and differentiated to myotubes using 2 % horse serum. After myotubes formation, 100 or 1,000 μg/ml HACE, as intervention, and as control 1 % DMSO were added for 3 h. Cells were washed and homogenized followed by ultracentrifuge fractionation, protein separation by SDS-PAGE and GLUT4 detection using semi-quantitative Western blotting. Data analysis was done by two-independent samples t test for comparison of mean ± SD of GLUT4 percent in categories. GLUT4 contents were higher in CM of groups 100 and 1,000 μg/ml HACE and lower in 1 % DMSO treated myotubes (CI = 0.95, P < 0.05). For N/ER reverse results were obtained (CI = 0.95, P < 0.05). As our results have shown HACE induces GLUT4 translocation from intra-cell into cell surface. We conclude that cinnamon maybe a choice of type-2 diabetes mellitus treatment because its extract enhances GLUT4 contents in CM where it facilitates glucose entrance into the cell. However it is necessary to trace the signaling pathways which are activated by HACE in muscular tissue. 相似文献
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Action research is geared to changes for the better and has the potential to assist teachers to extend their teaching skills and develop a deeper understanding of themselves, their classroom and their learners. However, in the area of applied linguistics, the viability of action research has been seriously questioned. In this article, we argue that adopting a complexity‐theory perspective, which requires teachers to be dynamic and complex in their approach, helps in identifying action research as a suitable research tradition for investigating second‐language classrooms and in turn using it widely to invigorate the field of applied linguistics. Our argumentation is supported by the fundamental links between action research and complexity theory as an emerging paradigm in education. Although the case made in this article concerns second‐language classrooms, the conclusions reached may well apply to any classroom that shares some commonalities with second‐language classrooms. 相似文献
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The present study investigates the nature of Iranian student teachers’ reflections and their professional development in the context of teacher education practicums. The participants were student teachers (N = 41) enrolled in teacher education colleges at Farhangian University in Tehran, Iran. A total of 620 reflective writing excerpts were coded using deductive content analysis across three cohorts in three different practicums during a two-year period. To analyse the data, this study applied a rubric for evaluating student teachers’ reflections developed by Ward and McCotter. The analysis also involved Friedman’s test and follow-up Wilcoxon tests. The results show that routine levels of reflection significantly decreased across the three practicums, while technical levels of reflection significantly increased. The higher levels of reflection, namely dialogic and transformative levels, were rarely found in student teachers’ reflective writings across the practicums. This study discusses the need both to develop appropriate methods to guide student teachers in centralized contexts such as Iran and to investigate further aspects that enhance or hinder progress in the quality of reflection in teacher education. 相似文献
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ABSTRACT This study was designated to investigate the kinematical differences between successful and faulty spikes, in order to identify the best strategies leading to better spike performance. Simulating a real-game condition, 13 elite youth attackers performed 6 spikes in the presence of 2 blocks. The kinematic variables of the spike performances were recorded using 6 optoelectronic cameras (Vicon Motion systems, Oxford, UK). The paired sample t-test was used to compare the kinematic variables recorded during the delivery of successful and faulty spikes. Among the successful trials, both the angular velocities of the knees (≈12.4%) and hips (≈13.3%), and the vertical velocity of the centre of mass at take-off (≈6.5%) and arm swing (≈8.2%) were considerably higher during the plant phase. Consequently, the jump (≈4.3%) and spike (≈1.5%) heights, as well as the wrist velocity (≈5.5%), were significantly higher during the jump phase of successful spikes. In successful spike performances, the attackers adopted higher hip and knee angular velocities, combined with efficient arm swings, to produce higher take-off velocities and reach higher jump heights. This approach provides them with the better position regarding the ball and the blockers to find the best path and hit the ball with higher arm velocities. 相似文献
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An efficient hybrid evolutionary optimization algorithm based on PSO and SA for clustering 总被引：4，自引：0，他引：4
The K-means algorithm is one of the most popular techniques in clustering. Nevertheless, the performance of the K- means algorithm depends highly on initial cluster centers and converges to local minima. This paper proposes a hybrid evolutionary programming based clustering algorithm, called PSO-SA, by combining particle swarm optimization （PSO） and simulated annealing （SA）. The basic idea is to search around the global solution by SA and to increase the information exchange among particles using a mutation operator to escape local optima. Three datasets, Iris, Wisconsin Breast Cancer, and Ripley＇s Glass, have been considered to show the effectiveness of the proposed clustering algorithm in providing optimal clusters. The simulation results show that the PSO-SA clustering algorithm not only has a better response but also converges more quickly than the K-means, PSO, and SA algorithms. 相似文献
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Jafar Zarei Allahyar Montazeri Mohmmad Reza Jahed Motlagh Javad Poshtan 《Journal of The Franklin Institute》2007,344(5):577-594
In this paper two robust controllers for a multivariable vertical short take-off and landing (VSTOL) aircraft system are designed and compared. The aim of these controllers is to achieve robust stability margins and good performance in step response of the system. LQG/LTR method is a systematic design approach based on shaping and recovering open-loop singular values while mixed-sensitivity H∞ method is established by defining appropriate weighting functions to achieve good performance and robustness. Comparison of the two controllers show that LQG method requires rate feedback to increase damping of closed-loop system, while H∞ controller by only proper choose the weighting functions, meets the same performance for step response. Output robustness of both controllers is good but H∞ controller has poor input stability margin. The net controller order of H∞ is higher than the LQG/LTR method and the control effort of them is in the acceptable range. 相似文献