Kinematic analysis of three water polo front crawl styles

During water polo matches, players use different front crawl styles. The purpose of this study was to conduct a kinematic analysis of three water polo front crawl styles: front crawl with head under water, front crawl with head above water, and front crawl when leading the ball. Ten proficient water polo players performed 3 × 15 m sprints in each front crawl style, which were recorded three-dimensionally by two surface and four underwater cameras. The results showed no differences in performance and several kinematic characteristics among the water polo front crawl styles. However, front crawl when leading the ball showed shorter stroke length and greater stroke frequency. Front crawl with head underwater presented greater maximal finger depth and elbow angle at mid-stroke position. Front crawl with head above water and when leading the ball showed greater trunk obliquity and maximal depth of right and left foot, and shorter kick stroke frequency. The findings suggest that proficient players learn to master front crawl with head above water to achieve top velocity. Despite the common use of the front crawl with head underwater as the basis for water polo fast displacement, coaches should emphasize the use of the specific water polo styles to attain high performance.     

Promoting entrepreneurship among informatics engineering students: insights from a case study

ABSTRACT

Universities seek to promote entrepreneurship through effective education approaches, which need to be in permanent evolution. Nevertheless, the literature in entrepreneurship education lacks empirical evidence. This article discusses relevant issues related to promoting entrepreneurship in the software field, based on the experience of a 15-European Credit Transfer and Accumulation System course. This course seeks to instil in the students the recognition of the need to reconcile technical and business visions, organisational and commercial aspects, most of which have never been addressed previously. A series of semi-structured interviews made it possible to obtain relevant insights about the teaching–learning process underlying this course and its evolution over a seven-year period. Materials related with this course have been analysed, namely guidelines produced by the teachers and deliverables produced by the students. This article discusses the dimensions that were identified as fundamental for promoting entrepreneurship skills in the field of software, namely teamwork, project engagement, and contact with the market.     

Learning from and responding to students' questions: The authoritative and dialogic tension

In this study we present an analysis of classroom interactions initiated by students' wonderment questions. Our interest in such events arises from their potential to stimulate active intellectual engagement in classrooms, which can impact upon the subsequent development of the classroom discourse. In investigating this issue we shall address the following research question: How do student questions impact upon the teaching explanatory structure and modify the form of the ongoing classroom discourse, in selected science lessons? From data collected in a Brazilian secondary school we have selected three classroom episodes, with large differences in both the context in which the student's question emerges and in the communicative approach developed in response to it. The analysis, based on the framework proposed by Mortimer and Scott [Mortimer and Scott (2003). Meaning making in secondary science classrooms. Maidenhead: Open University Press], shows that questions made by students are important in providing feedback from students to the teacher, enabling adjustments to the teaching explanatory structure. These adjustments sometimes occur smoothly, at other times with major changes to the features of the classroom discourse, and elsewhere with misunderstanding and disagreement. The data also suggest the need to consider students' intentions and their active participation in the negotiation of both the content and structure of classroom discourse. © 2009 Wiley Periodicals, Inc. J Res Sci Teach 47:174–193, 2010     

Learning From Them Learning From Us. Participating in Citizenship Through a School/District Council Partnership Project

This paper identifies a number of problems facing school councils and examines their possible remit and function. It outlines a project aimed at improving school councils in a rural community college by fostering links with the local district council. The paper summarizes research aimed at understanding the authors' particular concept of participation and responsible action. They describe work undertaken with pupils and adults involved in this project. It concludes that as well as improving the school councils, such work can provide benefits to both partners by widening pupils' understanding of the functions of local government and providing an opportunity for councillors and council officers to connect with young peoples' perspectives.     

Educational performance and attitudes toward school as risk‐protective factors for violence: A study of the Asian/Pacific Islander Youth Violence Prevention Center

The purpose of this study was to examine whether school experiences, school performance, and other risk‐protective factors were related to violence among Hawaiian, Filipino, and Samoan youths residing in Hawai'i. This study analyzed survey data (N = 325) collected in three high schools having concentrations of Filipino, Hawaiian, and Samoan youths, as well as a smaller number of Japanese students, which served as a comparison group. The analyses consisted of bivariate and multivariate analyses of risk protection for violence. Two‐ and three‐way interactions were tested to examine whether there were specific gender and/or ethnic effects. The final model explained 29.3% of the variance in violent behavior. Five variables were significant: grade point average, pressure to choose between school and friends, favorable school attitude, feeling safe, and importance of college. Schools serving these populations should focus on fostering positive bonds between teachers and students and building bridges to families and neighborhoods. © 2010 Wiley Periodicals, Inc.     

The impact of polytechnic institutes on the local economy

Tertiary Education and Management - Higher education institutions and, particularly, polytechnic institutes in Portugal are, generally speaking, recognized as the key stakeholders in regional...     

Lexical and sublexical orthographic knowledge: relationships in an orthography of intermediate depth

It is widely accepted that orthographic knowledge comprises two components: word-specific orthographic knowledge, also termed lexical orthographic knowledge, and general orthographic knowledge, or sublexical orthographic knowledge. Until now, the study of the relationship between these components throughout literacy development has been somehow neglected. In this study, we examined how they are related at an early stage of literacy development in European Portuguese, an orthography of intermediate depth. Children followed from Grade 2–3 performed two of the most common tasks of orthographic knowledge—the Orthographic Choice Task and the Orthographic Awareness Task. Crossed-lagged structural equation modeling showed significant mutual contributions between the two components of orthographic knowledge, providing thus preliminary evidence of bidirectional relations over time. Results are discussed in the context of theories of reading development taking into account the influence of orthography consistency.