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1.
Daan Van De Pol Sena Alaeikhanehshir Mario Maas P. Paul F.M. Kuijer 《Journal of sports sciences》2016,34(12):1141-1147
The prevalence of ischaemia-related symptoms is remarkably high among elite indoor volleyball players. Since the exposure to sport-specific demands may be higher in beach volleyball compared to indoor volleyball, the aim of this study was to assess the prevalence of ischaemia-related symptoms and associated risk factors among world-class beach volleyball players. Therefore, a questionnaire survey was performed among beach volleyball players active during the 2013 Grand Slam Beach Volleyball in the Netherlands. In total, 60 of the 128 beach volleyball players (47%) participated: 26 males and 34 females from 17 countries. The self-reported prevalence of cold or blue or pale digits in the dominant hand during or immediately after practice or competition was 38% (n = 23). Two risk factors were independently associated with symptoms of blue or pale digits: more than 14 years playing volleyball (odds ratio (OR) 4.42, 90% confidence interval (90% CI) 1.30–15.07) and sex (female) (OR 4.62, 90% CI 1.15–18.57). In conclusion, the prevalence of symptoms associated with digital ischaemia is high among international world-class beach volleyball players. Female sex and the length of the volleyball career were independently associated with an increased risk of ischaemia-related symptoms. The high prevalence of these seemingly innocuous symptoms and possible associated risk factors warrant regular monitoring since early detection can potentially prevent thromboembolic complications and irreversible tissue damage. 相似文献
2.
Biodiversity is an emerging theme in science, society and, more recently, education. There is no one single definition of biodiversity that is adequate in all situations. Both the knowledge base and the value base of biodiversity are variable and questionable. Because of these characteristics, biodiversity makes for an interesting vehicle for linking science and society, and the investigation of the normative underpinnings of 'science-in-the making'. Based on a 3-year study, this paper explores the crossroads between science education and environmental education and presents a framework for tapping the environmental education potential of biodiversity. Outlined are a number stepping stones for making biodiversity meaningful to learners. It is argued that, from the perspective of environmental education, the illdefined nature of biodiversity is a useful feature. Biodiversity is renewing the discourse on nature conservation issues by bringing together different groups in society that are searching for a common language to discuss nature conservation issues in relation to sustainability issues. The resulting debate allows the socio-scientific dispute character of 'science-in-the-making' to surface. Participation in such a dispute is an excellent opportunity to learn about a highly relevant, controversial, emotionally charged and debatable topic at the crossroads of science, technology and society 相似文献
3.
付大安 《江西师范大学学报(哲学社会科学版)》2015,48(1):134-139
为了解地方本科院校增设学术英语的可行性,通过问卷调查、访谈和听课等方式对两校的师生进行了调研,得出结论:增设学术英语课程符合地方本科院校大学英语教学改革和发展的需求,既可缓冲专业英语的难度,也可做到四年英语学习不断线,还可以为基础英语教师开拓新的教学和研究领域。对地方本科院校的学术英语教材建设进行了探索。 相似文献
4.
Wilfried Admiraal Joke Kruiter Ditte Lockhorst Wouter Schenke Henk Sligte Ben Smit 《Studies in Continuing Education》2016,38(3):281-298
It is commonly understood that teachers in secondary school should develop throughout their career in order to stay as an essential factor in student learning. Schools can offer opportunities to link teachers’ professional learning to their school practice with a positive impact on teachers’ motivation to learn and the effectiveness of their learning. In this field study, teachers, school leaders, policy-makers, educational consultants and educational scholars were asked for their perceptions of conditions for teacher learning in school and of interventions in school to enhance teacher professional learning. These conditions and interventions were understood as affordances in schools that enable and support teacher professional learning. The main affordance in school these stakeholders mentioned was an open, but critical way in which teachers share their practices, collaborate and reflect upon their teaching practice. Collaborative practices seem to stimulate many interventions of teacher professional learning in school. Two implications of this finding are discussed. First, we suggest that the maximum teaching time should be reduced, team teaching should be more implemented or classes should be scheduled in such a way that teachers can meet. Second, distributed leadership approaches match with our findings about the role of school leaders in teacher professional learning. 相似文献
5.
Yegermal Tesfaw Atalay Daan Witters Steven Vermeir Nicolas Vergauwe Pieter Verboven Bart Nicola? Jeroen Lammertyn 《Biomicrofluidics》2009,3(4)
An electrokinetic driven microfluidic lab-on-a-chip was developed for glucose quantification using double-enzyme assay. The enzymatic glucose assay involves the two-step oxidation of glucose, which was catalyzed by hexokinase and glucose-6-phosphate dehydrogenase, with the concomitant reduction of NADP+ to NADPH. A fluorescence microscopy setup was used to monitor the different processes (fluid flow and enzymatic reaction) in the microfluidic chip. A two-dimensional finite element model was applied to understand the different aspects of design and to improve the performance of the device without extensive prototyping. To our knowledge this is the first work to exploit numerical simulation for understanding a multisubstrate double-enzyme on-chip assay. The assay is very complex to implement in electrokinetically driven continuous system due to the involvement of many species, which has different transport velocity. With the help of numerical simulation, the design parameters, flow rate, enzyme concentration, and reactor length, were optimized. The results from the simulation were in close agreement with the experimental results. A linear relation exists for glucose concentrations from 0.01 to 0.10 g l−1. The reaction time and the amount of enzymes required were drastically reduced compared to off-chip microplate analysis. 相似文献
6.
Hans Bonnet Daan Hoogwater Johan Spaans Caroline Wehrmann 《European Journal of Engineering Education》2006,31(2):155-167
Sustainability, enhancement of personal skills, social aspects of technology, management and entrepreneurship are of increasing concern for engineers and therefore for engineering education. In 1996 at Delft University of Technology this led to the introduction of a subject on sustainable entrepreneurship and technology in the course programmes of Chemical Engineering and Materials Sciences Engineering. This subject combines lectures, project work in which a business plan is written, sustainability and presentation training. This paper shows that it has been possible to combine entrepreneurship, sustainability and project education successfully in a subject for undergraduate engineering students and describes background, assumptions, outline, results and recent adjustments of this subject. It includes a discussion on how to integrate sustainability and entrepreneurship in terms of triple P (People, Profit, Planet) and how to incorporate it pragmatically in the key elements of a business plan: (1) business idea, mission and strategy; (2) context, stakeholder and market analysis; (3) marketing; (4) production; (5) organisation and management; (6) finance and reporting. Attention is paid to results regarding the business plan, spin-off like start-ups and also to the learning results of both students and lecturers. It ends drawing some lessons derived from the subject’s results and the learning experiences of both students and lecturers. 相似文献
7.
Educational dialogues and the fostering of pupils' independence: the practices of two teachers 总被引：1，自引：1，他引：0
If the purpose of an educational system is to guide pupils towards achieving independence, then certain conditions about the design and conduct of that system must be met. In this paper, those conditions are formulated from a socio‐cultural perspective on learning and development. This paper examines the extent to which those conditions were fulfilled by teachers judged ‘good’ by their pupils and by school management in a case‐study in two Montessori secondary schools. Because discourse is assumed to play a central role when pupils work on assignments with the teacher assisting them, dialogues occurring in various teaching‐learning situations were analysed. The types of language genre used by the teachers and pupils were found to be important characteristics of the ongoing dialogues. The main results were that ‘good’ teachers excel in the adoption of a personal approach to pupils, but they work much more intuitively than systematically or deliberately to stimulate pupils' development of higher mental functions. 相似文献
8.
The relationship between the reading and signing skills of deaf children in bilingual education programs 总被引：2，自引：0，他引：2
Hermans D Knoors H Ormel E Verhoeven L 《Journal of deaf studies and deaf education》2008,13(4):518-530
This paper reports on one experiment in which we investigated the relationship between reading and signing skills. We administered a vocabulary task and a story comprehension task in Sign Language of the Netherlands and in written Dutch to a group of 87 deaf children from bilingual education programs. We found a strong and positive correlation between the scores obtained in the sign vocabulary task and the reading vocabulary task when age, short-term memory scores, and nonverbal intelligence scores were controlled for. In addition, a correlation was observed between the scores in the story comprehension tasks in Sign Language of the Netherlands and written Dutch but only when vocabulary scores for words and signs were not taken into account. The results are briefly discussed with reference to a model we recently proposed to describe lexical development for deaf children in bilingual education programs (Hermans, D., Knoors, H., Ormel, E., & Verhoeven, L., 2008). In addition, the implications of the results of the present study for previous studies on the relationship between reading and signing skills are discussed. 相似文献
9.
Ditte Lockhorst Wilfried Admiraal Albert Pilot Wim Veen 《Education and Information Technologies》2002,7(4):377-384
In the design of a Telematic Learning Environment (TLE) in which student teachers learn collaboratively, we consider three clusters of design elements as important: the Telematic Work Environment, the guidance of the instructor and the task instruction. We will have a look at the way group and task behaviour, triggered by these design elements influence the collaborative outcomes. Experiments have revealed that the technical environment is not as important as we had expected beforehand. This research shows that the task instruction (pre-imposed structure, role taking and intrinsic motivation for the task) and the group process itself have far more impact on the online collaborative work of the student teachers. 相似文献
10.
The quality of interpretations produced by sign language interpreters was investigated. Twenty-five experienced interpreters were instructed to interpret narratives from (a) spoken Dutch to Sign Language of The Netherlands (SLN), (b) spoken Dutch to Sign Supported Dutch (SSD), and (c) SLN to spoken Dutch. The quality of the interpreted narratives was assessed by 5 certified sign language interpreters who did not participate in the study. Two measures were used to assess interpreting quality: the propositional accuracy of the interpreters' interpretations and a subjective quality measure. The results showed that the interpreted narratives in the SLN-to-Dutch interpreting direction were of lower quality (on both measures) than the interpreted narratives in the Dutch-to-SLN and Dutch-to-SSD directions. Furthermore, interpreters who had begun acquiring SLN when they entered the interpreter training program performed as well in all 3 interpreting directions as interpreters who had acquired SLN from birth. 相似文献