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31.
Polyzois Makras George N Koukoulis George Bourikas George Papatheodorou Konstantinos Bedevis Panagiotis Menounos 《Journal of sports sciences》2013,31(8):825-834
In this study, we assessed the effects of a 4 week basic military physical training programme for male recruits of the Hellenic Air Force on the number and distribution of circulating immune cells and adrenergic and adrenocortical hormonal responses. One group of recruits (exercised, n = 48) participated in moderate intermittent physical exercise, whereas a second group (non-exercised controls, n = 9) performed only light work in the barracks. Both groups participated in the same non-physical, classroom-type training and testing. Military training by the exercised group resulted in significant increases in CD4?+? T-lymphocytes, renal cortisol excretion and the urinary noradrenaline/adrenaline ratio, together with reductions in neutrophils and the neutrophil/lymphocyte ratio. In the exercised group, the urinary noradrenaline/adrenaline ratio correlated positively with the training-induced changes in CD4?+? T-lymphocytes and negatively with changes in the neutrophil/lymphocyte ratio. No significant relationship was found between training-induced increases in cortisol excretion and any of the peripheral blood cell alterations. Our results indicate that 4 weeks of military training consisting of intermittent moderate exercise resulted in a significant increase in CD4?+? T-lymphocytes and reduction in neutrophils. These changes were probably driven by alterations in hormonal status, including the significant impact of sympathetic nervous system activation. 相似文献
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Teachers play a crucial role in the development of primary school students’ creative potential in either a positive or a negative way. This paper aims to draw attention to in-service and prospective teachers’ conceptions of creativity and answer three main research questions: “What are the teachers’ conceptions and implicit theories of creativity in general?”, “What are the teachers’ conceptions and implicit theories of creativity in the context of primary education?”, and “How well-trained and equipped do teachers feel to play their key role in the development of students’ creative potential?” A self-report questionnaire was used as an instrument to gather qualitative and quantitative data from 132 Greek in-service and prospective teachers. According to the selected quantitative data we present in this study, the majority of the participants reported that the facilitation of students’ creativity is included in the teachers’ role, but they (teachers themselves) do not feel well-trained and confident enough to realise this particular expectation. The authors conclude that further research is needed in order to: (i) reveal more on teachers’ conceptions on creativity and (ii) understand and classify teachers’ particular needs to facilitate the creative potential of primary school students. 相似文献
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In this paper, the development of sixth grade students’ critical thinking skills in science courses is discussed relatively to the contribution of the integration of aspects of History of Science into instruction. Towards this direction a project on electromagnetism was designed and implemented aiming to engage primary school students in a critical examination of knowledge (importance, complexity and human implications) by generating argumentation and discussion in their classrooms. The “Test of Everyday Reasoning (TER)”, which targets the core critical thinking skills identified in “The Delphi Report” consensus, was translated and standardized for the Greek population in order to be used for the project’s assessment. A pre-post analysis was conducted for the experimental group and the control group. The encouraging results regarding critical thinking skills development are supportive to the integration of aspects of History of Science in science courses. 相似文献
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George Kospentaris Panagiotis Spyrou Dionyssios Lappas 《Educational Studies in Mathematics》2011,77(1):105-127
The aim of this study is to investigate the strategies employed by advanced high school and university students working on
six tasks concerning comparison and conservation of area. Special care has been taken in the test design so that the problems
could be dealt with using a variety of solution methods. Written responses and in-depth interviews with 21 12th graders and
university students of mathematics provided the empirical data. The results show that the majority of the participants either
did not prefer or had difficulties employing adequately formal reasoning. Visualization factors seem to exert considerable
influence. Moreover, many students confuse congruence with area equivalence. 相似文献
35.
In this paper are presented the views of Al Haytham and his predecessors on the shadows, the rectilinear propagation of rays
and the images produced by pinholes. Al Haytham had given erroneous views on the distribution of light in the shadows. Educational
applications of these are presented. These applications concern: (a) Simple experiments (b) Software. These applications give
an opportunity for a first presentation of some notions of photometry even to the primary level of education. Another important
use of the history of science is the explanation by Al Haytham of the ‘camera obscura’. This application is done both ways:
through an experimental setup and through the use of special software. 相似文献
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Science &; Education - This paper deals with two main research questions: a) Can we search for pupils' potential alternative ideas in the history of science and especially in those areas... 相似文献
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理论运用实践是体育科学的主要目的。体育科研人员必须将其研究信息成果,及时传递蛤教练及运动员,使他们在实践中加以应用。本研究针对1999年在法国举行的欧洲篮球冠军赛,通过对20场比赛的录像解析,力图分析不同进攻阶段对进攻产生的影响。所有数据的统计及处理,均利用一计算机篮球软件(BasketballAnalysisSystem)来处理。研究结果表明,在不同的进攻阶段内,进攻次数、投篮命中率、助攻等方面存在着差异。 相似文献
40.
The demographic changes in Greek schools underline the need for reconsidering the way in which migrant pupils move from their
everyday culture into the culture of school science (a process known as “cultural border crossing”). Migrant pupils might
face difficulties when they attempt to transcend cultural borders and this may influence their progress in science as well
as the construction of suitable academic identities as a means of promoting scientific literacy. In the research we present
in this paper, adopting the socioculturally driven thesis that learning can be viewed and studied as a meaning-making, collaborative
inquiry process, we implemented an action research program (school year 2008–2009) in cooperation with two teachers, in a
primary school of Athens with 85% migrant pupils. We examined whether the two teachers, who became gradually acquainted with
cross-cultural pedagogy during the project, act towards accommodating the crossing of cultural borders by implementing a variety
of inclusive strategies in science teaching. Our findings reveal that both teachers utilized suitable cross-border strategies
(strategies concerning the establishment of a collaborative inquiry learning environment, and strategies that were in accordance
with a cross-border pedagogy) to help students cross smoothly from their “world” to the “world of science”. A crucial key
to the teachers’ expertise was their previous participation in collaborative action research (school years 2004–2006), in
which they analyzed their own discourse practices during science lessons in order to establish more collaborative inquiry
environments. 相似文献