Scaling of upper-body power output to predict time-trial roller skiing performance

Abstract

The purpose of the present study was to establish the most appropriate allometric model to predict mean skiing speed during a double-poling roller skiing time-trial using scaling of upper-body power output. Forty-five Swedish junior cross-country skiers (27 men and 18 women) of national and international standard were examined. The skiers, who had a body mass (m) of 69.3 ± 8.0 kg (mean ± s), completed a 120-s double-poling test on a ski ergometer to determine their mean upper-body power output (W). Performance data were subsequently obtained from a 2-km time-trial, using the double-poling technique, to establish mean roller skiing speed. A proportional allometric model was used to predict skiing speed. The optimal model was found to be: Skiing speed = 1.057 · W ^0.556 · m ^?0.315, which explained 58.8% of the variance in mean skiing speed (P < 0.001). The 95% confidence intervals for the scaling factors ranged from 0.391 to 0.721 for W and from ?0.626 to ?0.004 for m. The results in this study suggest that allometric scaling of upper-body power output is preferable for the prediction of performance of junior cross-country skiers rather than absolute expression or simple ratio-standard scaling of upper-body power output.     

Creating entrepreneurial networks: academic entrepreneurship, mobility and collaboration during PhD education

Network-building activities of PhD students are an important area of study in furthering our understanding of academic entrepreneurship. This paper focuses on PhD students’ participation in network-building activities defined as mobility and collaboration, as well as own interest in and perceived grade of support for commercialisation from various levels of the university hierarchy. The results of a large-scale survey (of 1,126 PhD students at Link?ping University, Sweden, 41% response rate) presented here show that the majority of PhD students are engaged in collaborations with external organisations, though quite few (one quarter) have spent a part of their PhD education outside their home university. PhD students from all faculties are on average interested in commercialisation and in favour of it. However, PhD students from the faculty of Health Sciences state that it is difficult for them to combine research and commercialisation. Furthermore, interest in commercialisation of research results is relatively lowest amongst those PhD students who are undertaking mobility placements at other universities, thus pointing to an experienced incompatibility of research and academic entrepreneurship.     

Authentic Learning in a Sociocultural Framework: A case study on non‐formal learning

This paper reports a case study in which 53 adult refugees initiated their own forms of learning with the aim of strengthening their opportunities for integration into Swedish society. The overall research interest was to find out what theoretical implications can be drawn from a case study where two different forms of learning were implemented. One alternative was offered in a formal setting and another in a non‐formal setting where the group members shaped forms of learning themselves. The findings show that many features of non‐formal working procedures correspond with basic assumptions and key concepts of sociocultural theory. Furthermore, these features accord well with key concepts of authentic learning. In a similar way as theoretical aspects of “situated learning” can be seen as an integrated part of sociocultural theory, we discuss whether the notion “authentic learning” could be used as a dimension of supporting meaningful learning in contextualised inclusive learning environments.     

From Identity to Facility—The New Buildings for the Faculty of Humanities at the University of Copenhagen

This analysis seeks to unite both an architectural and an educational perspective on the transformation of the university into a postmodern institution. Our point of departure is an analysis of the new buildings for the Faculty of Humanities University of Copenhagen which are located on the island area of Amager, to the south of Copenhagen's centre. To put the transformation into perspective we will also consider the respective older buildings that house the universities of Copenhagen and Oslo. The analysis will illustrate how the university as an institution has changed in terms of characteristics, position in society and its understanding of itself. Previously, the university was a clearly defined institution, which had both the process of Bildung (liberal education) and the production of objective knowledge as its goal. Today's university has become a institution, which seeks to develop competence rather than Bildung and to facilitate knowledge in the Network Society. These changes can be explicated by the French philosopher Lyotard's analysis of the position of knowledge within the postmodern sphere.     

Commercially available compression garments or electrical stimulation do not enhance recovery following a sprint competition in elite cross-country skiers

This study investigated whether commercially available compression garments (COMP) exerting a moderate level of pressure and/or neuromuscular electrical stimulation (NMES) accelerate recovery following a cross-country sprint skiing competition compared with a control group (CON) consisting of active recovery only. Twenty-one senior (12 males, 9 females) and 11 junior (6 males, 5 females) Swedish national team skiers performed an outdoor sprint skiing competition involving four sprints lasting ～3–4 min. Before the competition, skiers were matched by sex and skiing level (senior versus junior) and randomly assigned to COMP (n?=?11), NMES (n?=?11) or CON (n?=?10). Creatine kinase (CK), urea, countermovement jump (CMJ) height, and perceived muscle pain were measured before and 8, 20, 44 and 68?h after competition. Neither COMP nor NMES promoted the recovery of blood biomarkers, CMJ or perceived pain post-competition compared with CON (all P?>?.05). When grouping all 32 participants, urea and perceived muscle pain increased from baseline, peaking at 8?h (standardised mean difference (SMD), [95% confidence intervals (CIs)]): 2.8 [2.3, 3.2]) and 44?h (odds ratio [95% CI]: 3.3 [2.1, 5.1]) post-competition, respectively. Additionally, CMJ was lower than baseline 44 and 68?h post-competition in both males and females (P?相似文献   

Trajectories in teacher education: Recognising prior learning in practice

This article analyses the trajectories into teacher education of a group of child minders who are studying to become pre-school teachers. The specific focus is what impact their prior experiences and learning from pre-school have on their trajectories, and how these experiences and learning are recognised in the first year of teacher education. A situated learning perspective is applied, with a focus on participation and trajectories in the two communities of practice in which teacher education is situated – the university and the pre-school. The data consist of transcribed interviews with ten student teachers, and additional data are gathered from stakeholders in the program. The results show that prior experiences and learning are given implicit and indirect recognition. In the practice of the pre-school, the trajectory means a shift in identity, from child minder to student teacher and pre-school teacher. In the practice of the university, prior experiences and learning help students in their trajectories from peripheral to fuller participation.     

Challenging the myths about madaris in Pakistan: A national household survey of enrolment and reasons for choosing religious schools

There is speculation about madaris in Pakistan as sources of terrorists and about levels and reasons for enrolment, but a dearth of empirical data. We studied madarsah enrolment among 53,960 representative households; 853 focus groups of parents discussed enrolment choices. In 2004, 2.6% of all children (3.8% of school-going children) aged 5–9 years attended a madarsah. Children from urban and less educated households were more likely to attend a madarsah, but there was no difference by sex of the child or household vulnerability. Parents chose madaris because they offered an Islamic education. Our findings challenge misconceptions about madaris in Pakistan.     

Parental governmentality: involving ‘immigrant parents’ in Swedish schools

In Sweden, calls for partnership between state institutions and local communities punctuate discussions of a number of areas of public policy. In this article, the discourse of partnership is analyzed in recent developments in Swedish educational policy, and particularly the involvement of ‘immigrant parents’ as partners collaborating with the school. In the article it is argued that, in partnerships between the school and ‘immigrant parents’, the ‘rules of the game’ are most often dictated by one of the partners (i.e. the Swedish school). Here, ‘immigrant parents’ are by various techniques being ‘measured’ and exhorted to adapt to an imagined ‘Swedish normality’, in order to become a ‘responsible’ parent and equal partner.     

A Course in Applied Chemistry at a Third World University

Summaries

English

An outline is given of a programme in applied chemistry within a classical chemistry department of a university located in a Third World country with certain specific needs. The curriculum has been specifically designed to provide students with the knowledge and skills used by chemists in Jamaican industry. Industry personnel were invited to participate fully in the development of the curriculum as well as in actual instruction. In this way, an attempt was made to bridge the gap between the ‘academic’ and the ‘real’ world.

The Third World has experienced a perennial shortage of skilled professional scientists, including chemical engineers. The role of the applied chemist, as envisaged by the authors, has assumed greater importance in the light of this shortage. The programme outlined can probably serve as a basis for discussion in other developing countries contemplating similar programmes.