排序方式: 共有19条查询结果,搜索用时 15 毫秒
1.
Samia Satti Osman Mohamed Nour 《Minerva》2011,49(4):387-423
In this paper we discuss the interaction between science policies (and particularly in the area of scientific research) and
higher education policies in Gulf and Mediterranean Arab countries. Our analysis reveals a discrepancy between the two sub-regions
with respect to integration in the global market, cooperation in scientific research and international mobility of students.
The paper discusses the implications of the analysis of reform policies and higher education restructuring. 相似文献
2.
Jago R Watson K Baranowski T Zakeri I Yoo S Baranowski J Conry K 《Journal of sports sciences》2006,24(3):241-251
The aims of this study were to: (1) determine whether the number of pedometer counts recorded by adolescents differs according to the adiposity of the participant or location on the body; (2) assess the accuracy and reliability of pedometers during field activity; and (3) set adolescent pedometer-based physical activity targets. Seventy-eight 11- to 15-year-old Boy Scouts completed three types of activity: walking, fast walking and running. Each type was performed twice. Participants wore three pedometers and one activity monitor during all activities. Participants were divided into groups of normal weight (BMI < 85th percentile) and at risk of being overweight (BMI > or = 85th percentile). Intra-class correlations across the three activities indicated reliability (r = 0.51 - 0.92, P < 0.001). This conclusion was supported by narrow limits of agreement that were within a pre-set range that was practically meaningful. Multivariate analysis of covariance indicated adiposity group differences, but this difference was a function of the increased stature among the larger participants (P < 0.001). Ordinary least-squares regression models and multi-level regression models showed positive associations between the number of pedometer and activity monitor counts recorded by the three groups of participants during all activities (all P < 0.001). The mean number of counts recorded for all participants during the fast walk was 127 counts per minute. In conclusion, the pedometers provided an accurate assessment of adolescent physical activity, and a conservative estimate of 8000 pedometer counts in 60 min is equivalent to 60 min of moderate to vigorous physical activity. 相似文献
3.
Ahmed Bendib Aissa Chouder Kamel Kara Abdelhammid Kherbachi Said Barkat Walid Issa 《Journal of The Franklin Institute》2019,356(13):6842-6874
In a microgrid (MG) topology, the secondary control is introduced to compensate for the voltage amplitude and frequency deviations, mainly caused by the inherent characteristics of the droop control strategy. This paper proposes an accurate approach to derive small signal models of the frequency and amplitude voltage at the point of common coupling (PCC) of a single-phase MG by analyzing the dynamics of the second-order generalized integrator-based frequency-locked loop (SOGI-FLL). The frequency estimate model is then introduced in the frequency restoration control loop, while the derived model of the amplitude estimate is introduced for the voltage restoration loop. Based on the obtained models, the MG stability analysis and proposed controllers’ parameters tuning are carried out. Also, this study includes the modeling and design of the synchronization control loop that enables a seamless transition from island mode to grid-connected mode operation. Simulation and practical experiments of a hierarchical control scheme, including traditional droop control and the proposed secondary control for two single-phase parallel inverters, are implemented to confirm the effectiveness and the robustness of the proposal under different operating conditions. The obtained results validate the proposed modeling approach to provide the expected transient response and disturbance rejection in the MG. 相似文献
4.
Ceridwen Evans Sandy Toogood Stephanie Owen-Leeds Leusa Dwyfor Shabreen Jorammanawar Nour Issa J. Carl Hughes 《British Journal of Special Education》2021,48(3):369-392
Research indicates that engagement acts as an important precursor for learning, yet sustaining the engagement of pupils with special educational needs can be a challenge for classroom staff. An Active Support staff training package, Interactive Training, has been demonstrated as an effective way of increasing engagement in adults accessing learning disability services. In theory the logic of Active Support Interactive Training could extend to a school environment, with the aim of achieving similar outcomes. The current study evaluated a special school-adapted version of Active Support Interactive Training with the aim of increasing engagement in pupils during group-based learning. Findings showed an increase in engagement in pupils for all three settings (classrooms) immediately after intervention, which continued to either increase or stabilise at three-month follow-up. Further research could test the engagement behaviour of staff pre- and post- training intervention and explore practice leadership within the school leadership team to address maintenance. 相似文献
5.
Albelbisi Nour Awni Al-Adwan Ahmad Samed Habibi Akhmad 《Education and Information Technologies》2021,26(3):3459-3481
Education and Information Technologies - MOOC is an innovative method in modern education, particularly important for sharing of excellent educational resources worldwide. To realize the full... 相似文献
6.
This study examined Library and Information Science (LIS) undergraduate students’ career aspirations in entrepreneurship and self-employment opportunities. A total of 155 students constituted the sample for the study. A self-designed questionnaire was used for the collection of data. The results demonstrate that 20.3% aspire to set up a small business, 39.2% prefer company employment, 30.4% prefer self-employment, and 20.3% prefer government employment. Forming partnerships, loans from banks and friends, grants from private foundations and personal savings and cash, private stock, and angel investors were identified as sources of funding. Careers available in LIS were identified to include librarian, abstracter, lecturer, web designer, database manager, archivist, information broker, publisher, and researcher. Hindrances to careers in entrepreneurship and self-employment were identified to include lack of access to financial services, access to physical infrastructure, and basic services. The study makes recommendations based on the findings. 相似文献
7.
INTRODUCTIONAmongmodelsusedtomathematicallyana lyzetheSAWfilter;themostimportantare ( 1 )delta functionmodel;( 2 )thecross fieldmodel;( 3 )theimpulse responsemodel.EachmodelcandescribemathematicallytheSAWfilter,considersomesecond ordereffects,andcanre vealsomeimpo… 相似文献
8.
Abstract We propose and evaluate the utility of an alternative method (decision boundaries) for establishing physical activity intensity-related accelerometer cutpoints. Accelerometer data collected from seventy-six 11- to 14-year-old boys during controlled bouts of moderate- and vigorous-intensity field physical activities were assessed. Mean values and standard deviations for moderate- and vigorous-intensity activities were obtained and normal equivalents generated. The decision boundary (the point of intersection of overlapping distributions) was used to create a lower-bound vigorous-intensity cutpoint. Receiver operating characteristic (ROC) curves compared the sensitivity and specificity of the new cutpoint and mean values with the actual activity. There was a 96.5% probability that participants performing vigorous-intensity physical activity were accurately classified when using the decision boundary of 6700 counts per minute, in contrast to the 50% accurately classified when the mean value was used. Inspection of the empirical ROC curve indicated that the decision boundary provided the optimal threshold to distinguish between moderate and vigorous physical activity for this dataset. In conclusion, decision boundaries reduced the error associated with determining accelerometer threshold values. Applying these methods to accelerometer data collected in specific populations will improve the precision with which accelerometer thresholds can be identified. 相似文献
9.
Ali S. M. Al‐Issa 《Teaching Education》2013,24(4):337-348
Teacher trainers/educators (the two terms will be used interchangeably) at the pre‐service level are important agents and influential raw models for their trainee teachers. They can contribute positively to the student teacher's socialization process via the progressive training modes they adopt, the informed decisions they make, the critical reflection and analytical thinking abilities they demonstrate, and the epistemic power and experience they possess and exhibit. In rigidly centralized and hegemonic educational systems, like Oman for instance, educators should be in a position to equip their prospective teachers with theoretical and practical tools to help them become efficient agents of change. 相似文献
10.
Uvanney Maylor Anthea Rose Sarah Minty Alistair Ross Tozun Issa Kuyok Abol Kuyok 《British Educational Research Journal》2013,39(1):107-125
This paper reports findings from a study commissioned by the (then) Department for Children, Schools and Families. The research mapped the provision, and explored the impact, of supplementary schools and aimed specifically to develop further understanding as to how supplementary schools might raise the attainment of Black and Minority Ethnic pupils. Drawing on a national survey and case study data from 12 supplementary schools, we highlight a range of perceived impacts identified by teachers, pupils and parents and problematise the concept of impact. We identify the unique contribution and impact that supplementary schools make to the mainstream school attainment of pupils from diverse (linguistic, cultural, ethnic) backgrounds. We suggest that there is much to be learnt by the mainstream school sector about the difference supplementary school education makes to minority ethnic children, while questioning whether mainstream indicators of impact should be applied to supplementary schools. 相似文献