Mechanical behaviour of cross-country ski racing poles during double poling     

Thomas Stöggl  Lars Karlöf 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(4):365-380

The purpose of this study was to evaluate the behaviour of cross-country ski poles during double poling on a treadmill using three-dimensional kinematics. The results were compared with standard laboratory tests of the pole manufacturers. A total of 18 skiers were analysed at two speeds (85% and 95% of the maximal speed) at grades of 1.5% and 7%. Variables describing cycle characteristics, bending stiffness, bending behaviour, and trajectories of the pole markers were analysed. Triangular-shaped poles demonstrated the greatest stiffness and lowest variability in maximal bending. Softer poles demonstrated greater variability in bending behaviour and lost ground contact at high skiing speeds, which for some skiers resulted in failure to complete high-speed tests. Considerable variations in pole behaviour for similar poles between skiers were observed, which might be attributed to differences in technique, indicating that mechanical properties of the poles did not exclusively determine pole behaviour in the dynamic situation. The greatest magnitude of pole bending was in the middle part of the pole, which differed from the standard static pole analysis of the manufacturer. Increases in grade demonstrated the greatest effect on pole bending. Distinct differences from the pole manufacturers' laboratory measures were apparent, suggesting that basic pole testing might be adapted.  相似文献   

Aesthetic Learning About,In, With and Through the Arts: A Curriculum Study     

Lars Lindström 《The International Journal of Art & Design Education》2012,31(2):166-179

Aesthetic learning is a major issue in arts education. The ‘method of art’ is often expected to facilitate in‐depth learning not only in the arts but across the curriculum. This article defines aesthetic learning in terms of a conceptual framework based on two dimensions, one representing the goal and the other the means of aesthetic learning. The goal is described as convergent or divergent. Convergent learning is goal‐directed, focused and rational, while divergent learning is explorative, open‐ended and intuitive. The means are described as medium‐specific or medium‐neutral. Medium‐specific learning emphasises the forms of representation, for example words, pictures, algebra, dance. Medium‐neutral learning emphasises instrumental aspects of learning, such as academic achievement or personal development. Combining these dimensions two‐by‐two, the author arrives at a suggested definition of what is meant by learning about, learning in, learning with and learning through the arts. The rest of the article investigates the potential utility of this framework in various contexts and for different purposes. First, the author presents two temporary ‘Culture‐in‐School’ projects. Secondly, the framework is used to study aesthetic learning processes in sloyd (art & craft), based on student teachers’ portfolios in metalwork. Thirdly, the four modes of learning are compared to equivalent modes of teaching: the instructor, the facilitator, the advisor and the educator. Fourthly, there is a discussion on the role of aesthetics in a ‘balanced’ curriculum. Finally, there is an argument on the need for a variety of assessment tools based on the four modes of learning and teaching, such as copying, portfolios, projects and the repertory grid technique.  相似文献   

Presenting the iterative curriculum discourse analysis (ICDA) approach     

Lars Laird Iversen 《British Journal of Religious Education》2014,36(1):53-71

The article presents a method for analysing recurring curriculum documents using discourse theory inspired by Ernesto Laclau and Chantal Mouffe. The article includes a presentation of the method in seven practical steps, and is illustrated and discussed throughout using the author’s recent case study on religion, identity and values in Norwegian curriculum. The author discusses the theoretical underpinnings of the approach, outlines its strengths and points to areas of further development.  相似文献   

More students of better quality? Effects of a mathematics and physics aptitude test on student performance     

Johan Söderlind  Lars Geschwind 《European Journal of Engineering Education》2017,42(4):445-457

This paper examines whether subject-specific admission tests may allow Swedish higher education institutions to admit better-performing students. The performance of students admitted via a mathematics and physics aptitude test was reviewed with a focus on activity, retention, and credits earned, and the results were compared with students admitted in traditional ways, such as secondary school grade point averages (GPA). The results show that the students admitted in the test quota show a higher activity rate as well as a higher retention rate than most other students, but that they are not as successful as the GPA quota students in acquiring their intended credits. It is concluded that subject-specific admission tests seem to entail higher student motivation and that they therefore may be a valuable instrument to supplement traditional admission instruments. The observed differences in the study have generated a number of hypotheses that would need further study to fully understand the merits of different admission instruments.  相似文献   

Fragments of an economic habitus. Conceptions of economic phenomena in freshmen and seniors     

Lars Owe Dahlgren 《European Journal of Psychology of Education - EJPE》1989,4(4):547-558

The article reports on parts of an empirical longitudinal study. Students of engineering, business administration, medicine and psychology have been interviewed at the beginning and at the end of their education. The focus in the present article is on the students of business administration. Two of the questions in the interview asked for the student’s conceptions about the most prominent contemporary economic problem and the cause of famine in the underdeveloped countries. The results show that the students of business administration to a large extent seem to change form an initially held political, distributionoriented perspective on the two questions to a more depoliticized efficiency perspective. This change means, in the case of the more general question about the most prominent economic problem that the initial emphasis on the uneven distribution of economic resources either in an international or in a national perspective in many cases was replaced by a stress on a more efficient utilization of resources or the necessity of more incentives for individual or collective initiatives. This tendency is not found among the students of medicine. In the second question the initially fragmented reasons for famine in terms of the relationship between developed and underdeveloped countries decreased in frequency leading to a stress on unfavorable conditions for food production or the new Maltusian notion of the different rates of population growth and increase in food production.  相似文献   

Getting Pole Position: Research strategies in the Humanities at Swedish universities     

Lars Geschwind 《Tertiary Education and Management》2013,19(2):115-127

The aim of this paper is to study research strategies in the Humanities in Sweden. The Swedish higher education sector is under transformation and a new funding system has been proposed. The study investigates the university strategy processes, mainly at the dean’s level. The results show that most institutions are active in order to be well prepared when a new funding system is launched. There are, however, big differences between universities in attitudes towards the proposed changes as well as the level of activity.  相似文献   

Public opinion and political outspokenness in pre‐1997 Hong Kong: Two tests of the spiral of silence theory     

Lars Willnat 《亚洲交流杂志》2013,23(2):47-67

This study analyses the impact of perceptions of the opinions of others on political outspokenness in Hong Kong. Based on the results of two representative telephone surveys conducted in Hong Kong in 1993 and 1995, the spiral of silence theory is tested in the context of public opinion regarding the Sino‐British dispute over Hong Kong's political future and the 1995 Legislative Council election. As hypothesized, respondents in both surveys were more willing to voice their political opinions publicly when they perceived the majority opinion to be on their side, or when they perceived a trend in support of their own political viewpoint. However, this effect was observed only for respondents who were not much concerned about either issue. People's political outspokenness was primarily boosted by higher issue salience, more exposure and attention to television news and news magazines, and higher political interest and efficacy.  相似文献   

Attacker's advantages in a homogeneous market: The case of GSM     

Dodo zu Knyphausen‐Aufseß  Christian Krys  Lars Schweizer 《媒体管理杂志》2013,15(4):212-224

Abstract

This article deals with the market entry and competitive strategies of two third entrants into the Western European GSM market: The Greek mobile communications operator Cosmote and the German operator E‐Plus. Starting point of our research is the analysis of the entire Western European GSM market, which shows a broad variance in performance indicators of the operators although the market characteristics regarding the product, the supply and the demand side are quite homogeneous. In order to explain the performance variance and the success of late movers we examine the market entry and competitive strategy of the most successful third entrant in Western Europe, Cosmote, and contrast this case to E‐Plus. The market environment and the company characteristics of both companies are similar, but their performance differs significantly. The major results of our analysis are (1) that quality of service, including particularly the network coverage at launch and in the first stage, is more important than time to market, (2) that the image of an operator depends strongly from the customer's perception in the starting phase, and (3) that the commitment in combination with the resources of the shareholders are crucial for the operators’ success.  相似文献   

Online Media and Political Participation: The Case of Malaysia     

Lars Willnat  W. Joann Wong  Ezhar Tamam  Annette Aw 《Mass Communication and Society》2013,16(4):557-585

This study is based on a survey of 526 adult Malaysians who were interviewed shortly before the 2008 national election about online media use, levels of political participation, and voting intentions. The goal was to document the role of online media in a society that controls political information in traditional media and, in turn, compels citizens to seek alternative news sources online. As predicted, the findings indicated that online media use was positively associated with higher levels of political participation among Malaysian voters. The use of and exposure to social networking sites, political blogs, political online videos, party websites, and political ads on cell phones showed strong associations with political activism. However, the use of political online media did not predict voters’ likelihood of voting.  相似文献   

A Cross-cultural Test of the Spiral of Silence Theory in Singapore and the United States1     

Waipeng Lee Assistant Proffessor  Benjamin H. Detenber  Lars Willnat  Sean Aday  Joseph Graf 《亚洲交流杂志》2013,23(2):205-226

This study examines the influence of individual-level characteristics on the spiral of silence effect in two countries, Singapore and the United States, making it the first cross-cultural test of the theory and thereby addressing a gap in the literature highlighted by Schefule and Moy (International Journal of Public Opinion Research, 12, 2000, 3–28). In two identical, representative telephone polls of 668 adults conducted in Singapore and 412 adults in Washington, DC, respondents were asked to indicate how likely they would be to discuss publicly two controversial issues: interracial marriage and equal rights for homosexuals. The proposed model for predicting outspokenness adds a variety of new predictors, such as culturally influenced self-concepts, fear of isolation, and communication apprehension, along with other more traditional predictors of outspokenness, such as a person's perception of the opinion climate, media exposure, issue salience, and demographics. The findings provide partial support for the spiral of silence hypothesis in Singapore, but not in the United States. Respondents’ perception of the future opinion climate in Singapore interacted with issue salience to influence their level of outspokenness; American respondents did not exhibit such an interaction effect. In both countries, however, outspokenness was associated with respondents’ perceived importance of the issue and their communication apprehension. Media exposure was not associated with outspokenness in either country.  相似文献