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1.
Efthimiadou A Asimakopoulos B Nikolettos N Giatromanolaki A Sivridis E Lialiaris TS Papachristou DN Kontoleon E 《Journal of sports sciences》2006,24(8):849-854
Although angiogenetic therapy using recombinant growth factors holds much hope for the treatment of ischaemic diseases, there are still many unanswered questions, including the method of administration, the correct dose of these factors, and the duration of the therapeutic approach. Exercise has also been suggested to induce neovascularizaiton in muscles. We evaluated the angiogenetic effects of the intramuscular administration of basic-fibroblast growth factor (b-FGF) and acidic-fibroblast growth factor (a-FGF) in rat heart, compared with rats who exercised daily. In conclusion, both the intramuscular administration of b-FGF and exercise increased significantly angiogenesis in the heart in contrast to the intramuscular administration of a-FGF, which was ineffective. 相似文献
2.
Maria Vlachou Eleni Andreou Kafenia Botsoglou Eleni Didaskalou 《Educational Psychology Review》2011,23(3):329-358
Bullying in schools has been identified as a serious and complex worldwide problem associated with negative short- and long-term
effects on children’s psychosocial adjustment (Smith 1999; Ttofi and Farrington, Aggressive Behav 34(4):352–368, 2008). Entering kindergarten is a crucial developmental step in many children’s lives mainly because it is within this context
where they participate, for the first time, as members in a stable peer group and well-organized team activities. Consequently,
preschool may be the first context beyond the home environment where children’s difficulties in social interactions with peers
can be primarily detected and assessed by adults and professionals. This paper reviews recent empirical evidence over the
nature and different aspects of bullying among preschool children. Recent findings concerning the development of preschool
bullying and its prevalence, family and genetic factors, gender and age differences, participant and peripheral roles, school
context, methodological issues, and prevention policies are reviewed while directions for future research are addressed. 相似文献
3.
Aikaterini Vassiou Athanasios Mouratidis Eleni Andreou Konstantinos Kafetsios 《教育心理学》2016,36(5):879-897
Performance at school is affected not only by students’ achievement goals but also by emotional exchanges among classmates and their teacher. In this study, we investigated relationships between students’ achievement goals and emotion perception ability and class affect and performance. Participants were 949 Greek adolescent students in 49 classes and their Greek language and mathematics teachers. Results from multilevel analyses indicated that students’ mastery-approach and performance-approach goals were positively related to positive affect whereas performance-avoidance goals were negatively related to positive affect. At class-level, relationships between achievement goals and affect were moderated by students’ emotion perception ability. These findings highlight the importance of emotion abilities and their role in motivational processes for class-level outcomes. 相似文献
4.
Eleni A. Katsigianni 《Journal of educational administration and history》2016,48(3):225-242
This study deals with the question of tenure/non-tenure of the Greek school principals and its possible impact on their role in the light of the international influences. In developing our theoretical perspective, we draw on the tenure/non-tenure discourse and the centralised bureaucratic and new public management model. After examining the relevant legislation issued from 1836 up to 2015 by following the qualitative content analysis, we find out that in the 1836–1981 period, tenure had become an integral part of the centralised educational system. Since 1981, the introduction of decentralised policies along with the abolition of tenure has resulted in the renewal of the same politics. By linking in a direct way the tenure/non-tenure topic with the international policies, we support the view that in the Greek centralised educational system, school principals have limited power to bring about effective changes at schools regardless of their tenure/non-tenure status. 相似文献
5.
Eleni Sianou-Kyrgiou 《Higher Education Quarterly》2010,64(1):22-40
Higher education has expanded to a remarkable extent in many countries in recent decades. Although this has led to high levels of participation, inequalities not only persist but are also strengthened. The persistence of inequalities is partly the result of policies for the widening of participation having been accompanied by institutional stratification with educational choices being unequal and socially defined. There is evidence that with the development of new university departments and the increase in the number of university entrants in Greece, a stratified system of higher education has emerged. This study draws on quantitative data that provides evidence that choice has been driven largely by the students' social class: the close relationship between social class and educational opportunities has remained intact. Furthermore, social inequalities in access and distribution in higher education persist, despite the substantial increase in participation in higher education. Social class is a key factor in the interpretation of choice of study, which, along with the performance in the national level examinations that determines entrance into universities, has also led to the increase in the stratification of higher education institutions. 相似文献
6.
We propose an approach to enhancing knowledge sharing and connectedness in distributed teams. Termed ‘Narrating Your Work’ (NYW), the approach involves members of distributed team using a microblogging tool to post regular updates about their current work, accomplishments, and issues. The NYW approach was evaluated within a geographically and temporally distributed team at Shell International for a period of one month, using a mixed-method research design. Methodology comprised of a quantitative survey, followed by semi-structured interviews and analysis of microblogging updates posted during the month in which the approach was being trialled. The evaluation results suggest that NYW was viewed as a valid and practical approach to enhancing knowledge sharing and connectedness. A range of barriers and enablers that could impact the future application and embedding of the approach are identified and recommendations for implementation are outlined. 相似文献
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8.
Eleni Katsarou 《Educational Action Research》2017,25(5):673-686
From the very first moment action research started to be used in the social research field until now, it has presented significant variations. Action research looks like a mosaic of theoretical and methodological approaches, named differently from time to time and/or from place to place: for example, practitioner inquiry, practitioner research, teacher research, participatory action research, and so forth. The basic aims of this article are to find the reasons for this and to discuss the implications of the phenomenon. Starting with the first issue, we could ask ourselves: why do we today find so many and considerable variations in action research approaches in the literature? The evident reason is because action research draws upon many theoretical paradigms that – in some circumstances – are not only different, but also contradict each other. Hammersley states characteristically that action research draws upon positivism, pragmatism, hermeneutics, critical theory and postmodernism! After such claims, we can easily wonder: how can such a multi-paradigmatic approach compose cohesive methodological proposals? We can also pose another crucial question: although we can easily understand that this multi-paradigmatic nature is a real advantage which gives action research a pluralistic essence, is it really ‘a strong indicator of the power of action research to reinvent itself according to local needs’ as Somekh stated, or might it at the same time conceal serious risks? 相似文献
9.
The problem factorizing (separating) the transfer function of a given SISO 3-D discrete system, ie of a system depending on three independent variables, is considered. The 3-D system is assumed to be available in its transfer function representation, which is converted to a canonical state-space model by a simple inspection procedure. Then applying state-feedback to this canonical model we choose the feedback matrix gain (under certain conditions) such that the transfer function of the closed-loop system has the desireed factorized form, ie a product of three 1-D transfer functions each one being dependent on a single variable. The method is illustrated by a nontrivial numerical example. 相似文献
10.
Iolie Nicolaidou Eleni A. Kyza Frederiki Terzian Andreas Hadjichambis Dimitris Kafouris 《科学教学研究杂志》2011,48(7):711-744
Assessing the credibility of evidence in complex, socio‐scientific problems is of paramount importance. However, there is little discussion in the science education literature on this topic and on how students can be supported in developing such skills. In this article, we describe an instructional design framework, which we call the Credibility Assessment Framework, to scaffold high school students' collaborative construction of evidence‐based decisions and their assessment of the credibility of evidence. The framework was employed for the design of a web‐based reflective inquiry environment on a socio‐scientific issue, and was enacted with 11th grade students. The article describes the components of the Credibility Assessment Framework and provides the details and results of an empirical study illustrating this framework in practice. The results are presented in the form of a case study of how 11th grade students investigated and evaluated scientific data relating to the cultivation of genetically modified plants. Multiple kinds of data were collected, including pre‐ and post‐tests of students' conceptual understanding and their skills in assessing the credibility of evidence, and videotapes of students' collaborative inquiry sessions. The analysis of the pre‐ and post‐tests on students' conceptual understanding of Biotechnology and their skills in assessing the credibility of evidence revealed statistically significant learning gains. Students' work in task‐related artifacts and the analysis of two groups' videotaped discussions showed that students became sensitive to credibility criteria, questioned the sources of data and correctly identified sources of low, moderate, and high credibility. Implications for designers and educators regarding the application of this framework are discussed. © 2011 Wiley Periodicals, Inc. J Res Sci Teach 48: 711–744, 2011 相似文献