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201.
Christian Rüede 《Educational Studies in Mathematics》2013,83(3):387-408
While an algebraic expression is typically assigned a regular structure, this article introduces the concept of personal structure (Strukturierung); here, the structuring of an algebraic expression is understood as the act of forming relationships between its parts. This concept is used for the analysis of interviews in which experts and novices talk about the personal structures they produced when looking at fractional expressions and equations. The results show, firstly, that experts will structure a given fractional expression in various different ways. Secondly, four categories have been identified: structuring can mean that an expression is made more visually straightforward, changed, reinterpreted or classified. This is meaningful for negotiating the appropriateness of the personal structures in teaching algebra. 相似文献
202.
While the purposes of design and science are often different, they share some key practices and processes. Design-based science learning, which combines the processes of engineering design with scientific inquiry, is one attempt to engage students in scientific reasoning via solving practical problems. Although research suggests that engaging students in design-based science learning can be effective for learning both science process and content, more research is needed to understand how to overcome what Vattam and Kolodner (Pragmatics and Cognition 16:406–437, 2008) called “the design–science gap.” This study, therefore, takes a first step at systematically delving into this issue of bridging the design–science gap by examining the problem-solving strategies that students are using when they solve a prototypical design task. Videotaped performance assessments of high and low performing teams were analyzed in depth. Results suggest that students use both science reasoning strategies (e.g., control of variables) and design–focused strategies (e.g., adaptive growth). However, the strategies commonly associated with success in science (e.g., control of variables) did not necessarily lead to success in design. In addition, while both science reasoning strategies and design–focused strategies led to content learning, the content learned was different. 相似文献
203.
In a comprehensive empirical investigation (N = 71,405) we analyzed the development of legal expertise in a critical 1-year period of academic legal training in which advanced law students start practicing to solve complex cases. We were particularly interested in the functional form of the learning curve and inter-individual differences in learning. Performance increases monotonically with the number of practice exams following a slightly concave learning curve without any considerable kinks. Considering the performance development over time, however, the curve is not monotonic and shows intermediate drops in performance. We provide evidence which suggests that these drops are due to cyclic drops in motivation. There are about equally sized marginal effects of practicing law exams in general and practicing exams in the specific area of law. However, students with high (vs. low) initial performance profit more from practicing exams within a specific area of law whereas students with low initial performance profit more from practicing exams in general. The concave increase in performance with the number of practicing exams is mainly driven by individuals with low initial performance. Those with high initial performance mainly display a linear learning trend. We discuss the practical implications of these findings for academic legal training. 相似文献
204.
School delinquency has been linked to an array of negative educational outcomes, and if left unchecked, may lead to more serious problems in adulthood. Identifying the risk and protective factors that influence school delinquency is therefore crucial to develop effective intervention programs. Utilizing Hirschi's social bond theory as a framework, the authors investigated the relationships between social bonds (i.e., parental involvement, bond to school, beliefs, commitment to sport activities, commitment to non‐sport activities, and involvement) and school delinquency among a nationally representative sample of 10th graders. Special attention was given to gender differences. Results indicate that social bond measures account for a significant variance in school delinquency (11.2%, p < .001) above and beyond that predicted by socioeconomic status (1.5%, p < .001), and that the relationships between social bonds and school delinquency vary across gender. Practical and theoretical implications are for educators and researchers alike. 相似文献
205.
Laura Helena Hartmann M. Sc. Christian Schulz-Wiemann M. Sc. Prof. Dr. Achim Spiller Prof. Dr. Jan Gertheiss 《Sportwissenschaft》2014,44(2):99-115
A critical analysis of the existing ranking systems of German and international horse sports could identify weak points with regard to their implicit evaluations of the horses’ performances. This study is aimed at developing a feasible and more performance-related valuation method and comparing it with the existing cumulative ranking systems of the German and international equestrian umbrella organizations. On the one hand, the modeling is based on a method using average points per competition; on the other hand, by considering additional points and drawbacks. We investigated a sample of 50 top-ranked jumping horses and monitored the differences towards the existing ranking systems. The modification proposed results in significant implications on the rankings. The validity in relation to the horses’ performance evaluation could be improved. As a consequence, the interests of different stakeholder groups are better served than before. It is recommended to further develop the existing ranking system accordingly and to analyze a more differentiated placing of points. 相似文献
206.
Allan B. de Guzman Reena-Jane D. Dangoy Kathleen Christian V. David Ken Jarrett H. Dayo Keisha A. de Claro Giorgio von Gerri G. de Guzman 《Educational gerontology》2013,39(3):260-276
Nurses play a significant role in geriatric care. However, as the aging population and demand for geriatric nurses increase worldwide, shortages of nurses seem to arise. This creates the need to assess and address the motivation and attitudes of nurses toward geriatric care. The intent of this qualitative study is to surface the essence or the “lebenswelt” that describe the motivation and attitudes of a selected group of Filipino nurses toward geriatric care. A total of six registered nurses who had experienced taking care of elderly patients voluntarily participated as respondents of this study. A two-part instrument developed by the researchers was made to elicit necessary data and information. The first part comprised of the robotfoto intended to establish the baseline characteristics of nurses under study. The second part consisted of a semistructured individual in-depth interview using “aide memoire” to probe into the motivation and attitudes of the nurse respondents. Field texts were phenomenologically reduced via repertory grid. Two distinct and interesting themes, namely Geriatric Service Motivation Typology and the Yin-Yang of Geriatric Attitudes emerged. The first theme includes the Single Loop and Double Loop type of motivation The former involves a transactional and unidirectional process, while the latter constitutes a two-way relational and transformational process. The second theme consists of a harmonious combination of the two sides of the nurses' attitudes toward geriatric care. Through this study, the human side of nursing is seen and captured, thus increasing the awareness and knowledge of nurses, improving provision of optimum geriatric care, and inspiring nurses to pursue geriatric nursing with a yearning to serve the elderly with and from the heart. 相似文献
207.
Allan B. de Guzman Benito Christian B. Jimenez Kathlyn P. Jocson Aileen R. Junio Drazen E. Junio Jasper Benjamin N. Jurado 《Educational gerontology》2013,39(3):138-154
Anchored on the key constucts of Ajzen's Theory of Planned Behavior (1985), this paper seeks to test a model that explores the influence of knowledge, attitude, and caring behavior on nursing students’ behavioral intention toward geriatric care. A five-part survey-questionnaire was administered to 839 third and fourth year nursing students from a comprehensive university in the Philippines. To delineate the underlying dimensions of knowledge, attitude, and caring behavior, an exploratory factor analysis (EFA) was carried out. The resulting factors were integrated in the proposed model prior to structural equation modeling (SEM). The emerging model shows that while knowledge did not directly influence intent, it had a direct impact in the development of attitudes. Impliedly, by delineating the variables through EFA, new relationships between specific knowledge, attitude, and caring behavior dimensions can be observed. As shown, a nursing student's intent to care for older people can be increased if he/she sees them as powerful and wise. On the other hand, if one sees older people as demanding in nature, he/she is less likely to pursue geriatric nursing in the future. Interestingly, the resulting structural model in this study has successfully and clearly delineated the positive and negative determinants of nursing students’ intent to care for geriatric patients. The researchers hope that the model be used as an assessment tool for various nurse populations in order to effectively plan innovative strategies when introducing geriatric nursing. 相似文献
208.
Faming Wang Christian J Sanders Isaac R Santos Jianwu Tang Mark Schuerch Matthew L Kirwan Robert E Kopp Kai Zhu Xiuzhen Li Jiacan Yuan Wenzhi Liu Zhi'an Li 《国家科学评论(英文版)》2021,8(9)
Coastal tidal wetlands produce and accumulate significant amounts of organic carbon (C) that help to mitigate climate change. However, previous data limitations have prevented a robust evaluation of the global rates and mechanisms driving C accumulation. Here, we go beyond recent soil C stock estimates to reveal global tidal wetland C accumulation and predict changes under relative sea level rise, temperature and precipitation. We use data from literature study sites and our new observations spanning wide latitudinal gradients and 20 countries. Globally, tidal wetlands accumulate 53.65 (95%CI: 48.52–59.01) Tg C yr−1, which is ∼30% of the organic C buried on the ocean floor. Modeling based on current climatic drivers and under projected emissions scenarios revealed a net increase in the global C accumulation by 2100. This rapid increase is driven by sea level rise in tidal marshes, and higher temperature and precipitation in mangroves. Countries with large areas of coastal wetlands, like Indonesia and Mexico, are more susceptible to tidal wetland C losses under climate change, while regions such as Australia, Brazil, the USA and China will experience a significant C accumulation increase under all projected scenarios. 相似文献
209.
In the defence industry the recent development of a ‘market for technology’, the creation of new European high-technology companies as well as transformations in government agencies have driven firms to reposition their technological and organizational skills. Our objective is to show that the transformations that have occurred in the past 10 years have not only redefined skills and the organization of production, but also have given a more strategic place to knowledge management (KM) practices. We provide a contextual and historical overview based on qualitative interviews, in order to better understand the relation between KM and innovative behaviour in this industry. We build an original industrial and technological database comprising various samples that provides quantitative information concerning KM and innovative practices. The results of the statistical analysis reveal the specificity of firms in this industry. Taking account of the size of these firms and their technological intensity, we show that the behaviour of defence industry firms in terms of KM practices, differs from that of other firms. This is evident from their technological performance, and innovation and patenting intensity. This structural tendency is explained as an innovative behaviour in the French national innovation system rather than merely a ‘trend’. 相似文献
210.
The incidence of revealed fraud and dishonesty in academia is on the rise, and so is the number of studies seeking to explain scientific misconduct. This paper builds on the concepts of competing logics and institutional fields to analyze a serious case of medical and scientific misconduct at a leading research institute, Karolinska in Sweden, home to the Nobel Prize in Medicine.By distinguishing between a market-oriented, a medical and an academic logic, the study analyzes how various actors ? executives, research leaders, co-authors, journal editors, medical doctors, science bloggers, investigative journalists and documentary filmmakers ? sustained or tried to expose the misconduct. Despite repeated warnings from patient-responsible doctors and external academic reviewers, Karolinska protected the surgeon, Paolo Macchiarini, until a documentary film at the Swedish national public TV exposed the fraud which led to public inquiries and proposals for a new national ethics legislation.The analysis illustrates the power of a market-oriented logic focused on brand and image at the research institute and at a leading journal, but also the perseverance of the logics of scientific scrutiny and medical care among practicing doctors and independent academics although the carriers of these logics were less well organized than the carriers of the market-oriented logic. Furthermore, the analysis shows the problem of fragmented control in the academic institutional field. The discussion of remedies compares the Karolinska case, where media actors were instrumental in sanctioning the perpetrators, with a similar instance of medical misconduct at Duke in the US where the government agency (ORI) intervened and shows the limitations of both types of actors. The conclusion highlights the importance of studying misconduct management and institution-building in different fields to develop effective remedies. 相似文献