Indicators of sailing performance in youth dinghy sailing     

Margot Callewaert  Jan Boone  Bert Celie  Dirk De Clercq 《European Journal of Sport Science》2015,15(3):213-219

Abstract

This study aimed to determine indicators of sailing performance in 2 (age) groups of youth sailors by investigating the anthropometric, physical and motor coordination differences and factors discriminating between elite and non-elite male optimist sailors and young dynamic hikers. Anthropometric measurements from 23 optimist sailors (mean ± SD age = 12.3 ± 1.4 years) and 24 dynamic youth hikers (i.e. Laser 4.7, Laser radial and Europe sailors <18 years who have to sail the boat in a very dynamic manner, due to a high sailor to yacht weight ratio) (mean ± SD age = 16.5 ± 1.6 years) were conducted. They performed a physical fitness test battery (EUROFIT), motor coordination test battery (Körperkoordinationstest für Kinder) and the Bucket test. Both groups of sailors were divided into two subgroups (i.e. elites and non-elites) based on sailing expertise. The significant differences, taking biological maturation into account and factors discriminating between elite and non-elite optimist sailors and dynamic hikers were explored by means of multivariate analysis of covariance and discriminant analysis, respectively. The main results indicated that 100.0% of elite optimist sailors and 88.9% of elite dynamic hikers could be correctly classified by means of two motor coordination tests (i.e. side step and side jump) and Bucket test, respectively. As such, strength- and speed-oriented motor coordination and isometric knee-extension strength endurance can be identified as indicators of sailing performance in young optimist and dynamic youth sailors, respectively. Therefore, we emphasise the importance of motor coordination skill training in optimist sailors (<15 years) and maximum strength training later on (>15 years) in order to increase their isometric knee-extension strength endurance.  相似文献   

Isolation and enrichment of low abundant particles with insulator-based dielectrophoresis     

Alexandra LaLonde  Maria F. Romero-Creel  Mario A. Saucedo-Espinosa  Blanca H. Lapizco-Encinas 《Biomicrofluidics》2015,9(6)

Isolation and enrichment of low-abundant particles are essential steps in many bio-analytical and clinical applications. In this work, the capability of an insulator-based dielectrophoresis (iDEP) device for the detection and stable capture of low abundant polystyrene particles and yeast cells was evaluated. Binary and tertiary mixtures of particles and cells were tested, where the low-abundant particles had concentration ratios on the order of 1:10 000 000 compared to the other particles present in the mixture. The results demonstrated successful and stable capture and enrichment of rare particles and cells (trapping efficiencies over 99%), where particles remained trapped in a stable manner for up to 4 min. A device with four reservoirs was employed for the separation and enrichment of rare particles, where the particles of interest were first selectively concentrated and then effectively directed to a side port for future collection and analysis. The present study demonstrates that simple iDEP devices have appropriate screening capacity and can be used for handling samples containing rare particles; achieving both enrichment and isolation of low-abundant particles and cells.  相似文献   

How much exercise are older adults living in nursing homes doing in daily life? A cross-sectional study     

Philipe De Souto Barreto  Laurent Demougeot  Bruno Vellas  Yves Rolland 《Journal of sports sciences》2015,33(2):116-124

Information on the amount of exercise practised by nursing home (NH) residents is scarce. This study aimed at describing NH residents’ participation in exercise classes, as well as to examine whether the presence of a professional exercise instructor in the facilities is associated with residents’ exercise habits. The cross-sectional data of 5402 residents (median age = 88 years; mostly women (75.2%)) from 163 NHs in France were analysed. Adjusted logistic and linear regressions were performed to examine whether the presence of a professional exercise instructor in the NH was associated with exercise habits: exercise participation, frequency, duration, and levels. From the 5402 participants, 1914 were participating in exercise classes provided in the NH. Most of them had an exercise frequency of 1x/week or less. Median duration of exercise sessions was 45 min. Exercise levels were rated as: highly active (n = 487), intermediately active (n = 1096), and poorly active (n = 331). The presence of a professional exercise instructor working in the facility was significantly associated with exercise participation and with higher exercise frequencies and levels, and session duration. In conclusion, the presence of professional exercise instructors is associated with better exercise habits in NH residents. Improved exercise habits may potentially be translated into better health in this population.  相似文献   

The health sciences librarian as scientific entertainer     

Blanca San José Montano 《Journal of the Medical Library Association》2015,103(2):103-106

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王阳明“知行合一”说的系统论分析     

彭德林 《湖州师范学院学报》2015,(3):54-58

从系统的整体性理解王阳明“知行合一”说,可知：“知行合一”是一个由目的、手段和根据构成的有机整体;知行的本来体段就是合一的,而语言的遮蔽、私欲阻碍和析心理为二的剧场假相,使得知行分离,这三者都背离了“致良知于事事物物”的要求;个体要真正做到知行合一,就必须在事亲事君、交友治民等具体实践中,通过致良知的努力,体认知行合一的真谛,为善去恶,成就个人的德性,这样才能实现安天下之民的目的。从系统的层次性审视阳明哲学可见,阳明虽然看到了个体的知和行、德性之知和闻见之知、心的社会性和个性、道德的自觉和自愿、为学和生活等两两之间,都是一个有机整体,但受时代所限,其伦理学说系统仍然只有社会关系和伦理政治两个层次,缺少了物质生产这个根本层次,故其知行合一说的深度和说服力不够。  相似文献   

The promise and reality of formative assessment practice in a continuous assessment scheme: the case of Trinidad and Tobago     

Jerome De Lisle 《Assessment in Education: Principles, Policy & Practice》2015,22(1):79-103

Continuous Assessment (CA) systems are externally directed, curriculum-based assessment schemes used for both summative and formative purposes within classrooms. CA has been implemented as national policy in several postcolonial developing countries and is believed to hold great promise for improving education outcomes. This theory-driven evaluation (TDE) used a mixed methods research design to interrogate the nature of CA practice. The focus was on stakeholders’ understanding and practice of formative assessment in the CA Programme (CAP) of Trinidad and Tobago. The integrated findings suggest that the programme planners’ formative intent was often not fulfilled. Instead, teachers routinely recorded assessment marks without using the data. There is evidence that formative assessment practice was not congruent with teachers’ pedagogical beliefs and practices. Although the design of CA schemes suggests the possibility of synergy between formative and summative purposes, in reality this ideal is rarely achieved in these particular contexts.  相似文献   

Design and implementation of multi-campus,modular master classes in biochemical engineering     

Niek Wuyts  Dorine Bruneel  Myriam Meyers  Etienne Van Hoof  Leander De Vos  Greet Langie 《European Journal of Engineering Education》2015,40(4):400-409

The Master of Science in engineering technology: biochemical engineering is organised in KU Leuven at four geographically dispersed campuses. To sustain the Master's programmes at all campuses, it is clear that a unique education profile at each campus is crucial. In addition, a rationalisation is required by increased cooperation, increased exchange of lecturers, and increased student mobility. To achieve this, a multicampus education system for the M.Sc. in engineering technology: biochemical engineering was developed by offering modules that are also available for students of other campuses. Such a module is primarily based on the research expertise present at the campus. In the development, special attention has been given to the optimal organisation of the modules, evaluation, required modifications of the current curricula, and the practical consequences for students following the module at another campus. Even in the first year of implementation, around 30% of the students followed a multicampus module, which indicates the potential success of the multicampus concept described here.  相似文献   

Education as Part of the Migratory Project of Latin American Migrant Women Traveling to the United States in Undocumented Conditions     

Rocio Cardenas-Rodríguez  Teresa Terrón-Caro  Blanca Delia Vázquez Delgado  Teresa Elizabeth Cueva-Luna 《Journal of Latinos & Education》2015,14(2):86-94

Education is an indispensable element for the development of society. In Latin America, the point of origin of most of the undocumented immigrants to the United States, equal opportunity in access to education and educational achievement is still pending. The study presented here focuses on the analysis of the expectations of female migrants via Mexico’s northern border, focusing attention on educational attainment as an important aspect of the “American Dream” of the migrant women interviewed and their dependents.  相似文献   

The effect of school closures on standardised student test outcomes     

Joana Elisa Maldonado  Kristof De Witte 《British Educational Research Journal》2022,48(1):49-94

The school closures owing to the 2020 COVID-19 crisis resulted in a significant disruption of education provision, leading to fears of learning losses and of an increase in educational inequality. This article evaluates the effects of school closures based on standardised tests in the last year of primary school in the Dutch-speaking Flemish region of Belgium. Using a 6-year panel, we find that students of the 2020 cohort experienced significant learning losses in three out of five tested subjects, with a decrease in school averages of mathematics scores of 0.17 standard deviations and Dutch scores (reading, writing, language) of 0.19 standard deviations as compared to previous cohorts. This finding holds when accounting for school characteristics, standardised tests in Grade 4 and school fixed effects. Given the large observed effect sizes, the effect of school closures appears to be a combination of lost learning progress and learning loss. Moreover, we observe that inequality both within schools and across schools rises by 7% for mathematics and 8% for Dutch. The learning losses are correlated with observed school characteristics, as schools with a more disadvantaged student population experience larger learning losses.  相似文献   

Patterns of Italian high school and university students’ attitudes towards physics: an analysis based on semiotic-cultural perspective     

Testa  Italo  De Luca Picione  Raffaele  Scotti di Uccio  Umberto 《European Journal of Psychology of Education - EJPE》2022,37(3):785-806

The purpose of this study was to analyse Italian high school and university students’ attitudes towards physics using the Semiotic Cultural Psychological Theory (SCPT). In the SCPT framework, attitudes represent how individuals interpret their experience through the mediation of generalized meaning with which they are identified. A view-of-physics questionnaire was used as an instrument to collect data with 1603 high school and university students. Data were analysed through multiple correspondence analysis and cluster analysis. We identified four generalized meanings of physics: (a) interesting and important for society; (b) a quite interesting, but badly taught subject at school and not completely useful for society; (c) difficult to study and irrelevant for society; and (d) a fascinating and protective niche from society. The identified generalized meanings are significantly correlated to the choice to study physics at undergraduate level and to the choice of attending physics-related activities in high school. Implications for research are discussed.

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