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1.
Vassilios Gourgoulis Alexia Boli Nikolaos Aggeloussis Panagiotis Antoniou Argyris Toubekis Georgios Mavromatis 《Journal of sports sciences》2015,33(7):696-712
The aim of this study was to assess the effect of the hand’s acceleration on the propulsive forces and the relative contribution of the drag and lift on their resultant force in the separate phases of the front crawl underwater arm stroke. Ten female swimmers swam one trial of all-out 25-m front crawl. The underwater motion of each swimmer’s right hand was recorded using four camcorders and four periscope systems. Anatomical landmarks were digitised, and the propulsive forces generated by the swimmer’s hand were estimated from the kinematic data in conjunction with hydrodynamic coefficients. When the hand’s acceleration was taken into account, the magnitude of the propulsive forces was greater, with the exception of the mean drag force during the final part of the underwater arm stroke. The mean drag force was greater than the mean lift force in the middle part, while the mean lift force was greater than the mean drag force in the final part of the underwater arm stroke. Thus, swimmers should accelerate their hands from the beginning of their backward motion, press the water with large pitch angles during the middle part and sweep with small pitch angles during the final part of their underwater arm stroke. 相似文献
2.
This study aimed to investigate the comparative value of experimenting with physical manipulatives (PM) in a sequential combination with virtual manipulatives (VM), with the use of PM preceding the use of VM, and of experimenting with PM alone, with respect to changes in students' conceptual understanding in the domain of heat and temperature. A pre–post‐comparison study design was used which involved 62 undergraduate students that attended an introductory course in physics. The participants were randomly assigned to one experimental and one control group. Both groups used the same inquiry‐oriented curriculum materials. Participants in the control group used PM to conduct the experiments, whereas, participants in the experimental group used first PM and then VM. VM differed from PM in that it could provide the possibility of faster manipulation, whereas, it retained any other features and interactions of the study's subject domain identical to the PM condition. Conceptual tests were administered to assess students' understanding before, during, and after the study's treatments. Results indicated that experimenting with the combination of PM and VM enhanced students' conceptual understanding more than experimenting with PM alone. The use of VM was identified as the cause of this differentiation. © 2008 Wiley Periodicals, Inc. J Res Sci Teach 45: 1021–1035, 2008 相似文献
3.
Marios C. Angelides 《International Journal of Information Management》1997,17(6):405-419
The aim of this paper is twofold. First, it discusses the use of the Internet and the World Wide Web for marketing and compares Internet and World Wide Web Marketing with traditional media Marketing. Then it discusses the impacts of Internet and World Wide Web marketing, how large they are, and how marketing and organizations are going to respond to these, which leads to the need for new business strategies. A presentation on how the Internet is currently being used in business serves as the anchor for the above discussion. 相似文献
4.
The aim of this study is to describe and analyse the structure of 3D geometry thinking by identifying different types of reasoning
and to examine their relation with spatial ability. To achieve this goal, two tests were administered to students in grades
5 to 9. The results of the study showed that 3D geometry thinking could be described by four distinct types of reasoning which
refer to the representation of 3D objects, spatial structuring, conceptualisation of mathematical properties and measurement.
The analysis of the study also showed that 3D geometry types of reasoning and spatial abilities should be modelled as different
constructs. Finally, it was concluded that students’ spatial abilities, which consist of spatial visualisation, spatial orientation
and spatial relations factors, are a strong predictive factor of the four types of reasoning in 3D geometry thinking. 相似文献
5.
Sylvia Celedón-Pattichis Carlos Alfonso LópezLeiva Marios S. Pattichis Daniel Llamocca 《Cultural Studies of Science Education》2013,8(4):873-887
There is a strong need in the United States to increase the number of students from underrepresented groups who pursue careers in Science, Technology, Engineering, and Mathematics. Drawing from sociocultural theory, we present approaches to establishing collaborations between computer engineering and mathematics/bilingual education faculty to address this need. We describe our work through the Advancing Out-of-School Learning in Mathematics and Engineering project by illustrating how an integrated curriculum that is based on mathematics with applications in image and video processing can be designed and how it can be implemented with middle school students from underrepresented groups. 相似文献
6.
Marios Goudas Irini Dermitzaki Konstantinos Bagiatis 《European Journal of Psychology of Education - EJPE》2000,15(3):271-280
The aim of the present study was to examine the relations of students’ intrinsic motivation in physical education lessons with factors such as perceived locus of causality, perceived competence and outcome expectancies. Five hundred sixteen students of grades 7–12 participated in the study. The students were randomly selected from three schools located in a medium sized town in Greece. Perceived locus of causality was examined using Ryan and Connell’s (1989) motivational orientation scales, while intrinsic motivation was assessed by means of the Intrinsic Motivation Inventory (Ryan, 1982). Outcome expectancies for ten possible outcomes of school physical education were assessed by means of two different scales, namely outcome evaluation and outcome likelihood. Causal modelling analysis showed that intrinsic motivation was mainly influenced by perceived usefulness which in turned was influenced by outcome expectations. Moreover, outcome expectations also influenced perceived locus of causality. These results show that students’ outcome expectancies for their participation in school physical education is an important factor influencing their intrinsic motivation. 相似文献
7.
Marios Koukounaras‐Liagis 《British Journal of Religious Education》2011,33(1):75-89
Contemporary thinking seems to be particularly interested in the investigation of the role of culture in socio‐political life. This article presents aspects of a research project, undertaken in Greece, looking into whether a cultural product can foster intercultural communication and influence young people’s perceptions of and attitudes to cultural and religious diversity. Such cultural products are the Theatre in Education (TiE) programmes, which focus on the use of the art of theatre as a means of educational intervention. For the purposes of our research a specially designed TiE programme was used as a means of intervention and as a research tool. Our research examines secondary education students’ perceptions of and attitudes to cultural and religious diversity prior to and following the intervention in Thessaloniki and in Thrace, Greece. This cultural intervention, which incorporates art and religion, offers new insights into the possibility of the use of TiE for the religious education of young people. 相似文献
8.
This study examined the effect of different goals (process, performance outcome, and multiple goals) and self-recording on self-regulation of learning a dart-throwing skill. Participants were 105 fifth and sixth graders who were randomly assigned to six (3 Goal type × 2 self-recording) experimental and one control group. Results showed a positive effect of self-recording on students’ performance, while no difference was found between the goal conditions. Moreover, goal group students made more technical attributions and adaptive inferences compared to the control group students. Results are discussed with reference to self-regulated learning, the pursuit of multiple goals and self-recording in physical education. 相似文献
9.
Kyriakides Marios Psaltis Charis 《European Journal of Psychology of Education - EJPE》2023,38(1):179-202
European Journal of Psychology of Education - We propose genetic social psychology as a theoretical framework to render intelligible both the suppression of the expression of prejudice and... 相似文献
10.
This study aimed at investigating the relations between students' strategic behaviour during problem solving, task performance and domain-specific self-concept. A total of 167 first- and second-graders were individually examined in tasks involving cubes assembly and in academic self-concept in mathematics. Students' cognitive, metacognitive, and Motivational/Volitional Strategic Behaviours were video-recorded and rated by two independent observers. Structural equation modelling showed that the cognitive and Metacognitive Strategic Behaviours were explained by a cognitive self-regulation factor which correlated with the Motivational/Volitional Strategic Behaviour factor. The importance of the cognitive self-regulation factor for task performance and the association of domain-specific self-concept with Motivational/Volitional Strategic Behaviour were shown. 相似文献