Influence of upright versus time trial cycling position on determination of critical power and W′ in trained cyclists

Body position is known to alter power production and affect cycling performance. The aim of this study was to compare mechanical power output in two riding positions, and to calculate the effects on critical power (CP) and W′ estimates. Seven trained cyclists completed three peak power output efforts and three fixed-duration trial (3-, 5- and 12-min) riding with their hands on the brake lever hoods (BLH), or in a time trial position (TTP). A repeated-measures analysis of variance showed that mean power output during the 5-min trial was significantly different between BLH and TTP positions, resulting in a significantly lower estimate of CP, but not W′, for the TTP trial. In addition, TTP decreased the performance during each trial and increased the percentage difference between BLH and TTP with greater trial duration. There were no differences in pedal cadence or heart rate during the 3-min trial; however, TTP results for the 12-min trial showed a significant fall in pedal cadence and a significant rise in heart rate. The findings suggest that cycling position affects power output and influences consequent CP values. Therefore, cyclists and coaches should consider the cycling position used when calculating CP.     

Evaluation of the implementation, use and effects of a computerised management information system in English secondary schools

Very little empirical large-scale research has been carried out on the use of IT in the management and administration of schools despite of the fact that schools all over the world have adopted such IT based systems. The move in many countries towards autonomous school management will further require the use of these systems. Sophisticated computerised school information systems (SISs) will have to provide school-based information relevant to the development of policies in areas where schools used merely to follow governmental guidelines. If such systems are to be designed and used to full effect, knowledge is urgently needed on the implementation, use and effects of established computerised SISs. The large-scale research project in England, reported here, goes some way towards filling this gap in our knowledge.     

The implications of Holland's constructs in the prediction of employment: A cautionary note

John Holland's model of vocational choice has been used for both individual and group career counselling, in a variety of social and cultural contexts. Typically, it is used to help people to make career decisions; however, Holland has also proposed that his model could be used for predicting the manner in which individuals would cope with unemployment and/or job change. In this paper, the authors present the results of a study assessing the validity of Holland's claims with respect to the efficacy of his theory in the prediction of job search success. The results of the study provided, at best, limited support for Holland's claims; most predictor/criteria combinations were found to have little or no relationship to each other. The authors conclude that the Holland model is of limited value for predicting job search success, and suggest the use of other data collection techniques for such purposes. The authors also recommend further research regarding the operationalization of Holland's constructs.     

‘WHAT DO YOU EXPECT OF THIS FRIEND?’

In Canada during the pre-television era, the perception of radio as an intimate medium profoundly affected the way people ordered their listening, production, performance and discussion of programming. With evidence drawn primarily from Canadian archival sources, this paper contends that radio's perceived intimacy deeply troubled those who considered themselves responsible for the physical and cultural welfare of listeners, and that Canada's early broadcasting experience provided a particularly good example of how worry could become action. Though thinking about intimacy had helped broadcasters before the mid-1930s to understand the function of radio in relation to other media, it also led the Canadian Broadcasting Corporation (CBC) after its formation in 1936 to scrutinize and control commercial and unsponsored programming, advertising and public service messages alike. The CBC's self-assigned stewardship role – a reaction to plentiful and popular American programming and an emulation of the British Broadcasting Corporation and European services – pushed it toward protecting children and other listeners thought to be gullible or sensitive from programmes that abused the intimate relationship by stepping beyond established boundaries of taste or threatening the Corporation's ‘civilizing’ role.     

Developing a science teacher education course that supports student teachers’ thinking and teaching about the nature of science

This paper reports on part of an ongoing research project in England concerning the Nature of Science (NOS). The particular focus is on the initial thinking of the graduate scientists starting a one-year, Postgraduate Certificate of Education (PGCE) course and the way the course approaches adopted influence their views and understanding of NOS and their teaching. The research is set against a wealth of literature indicating that teachers find it difficult to teach curricula that emphasise NOS. Thus a key impetus for research in this area has been to look for ways that beginning teachers might be better prepared to face such challenges.

Sample

The paper draws on data from three cohorts of secondary PGCE students in a university–schools partnership, involving a total of 169 students.

Design and method

The research lies within a design research tradition. It has used mixed methods, involving written tasks, interviews and focus groups, with an iterative approach where the outcomes from one cohort have been used to inform course developments in successive years.

Results

The results from these cohorts suggest that, while the students starting the course have a less restricted view of NOS than indicated by some other studies, in most cases there is a lack of breadth and depth to their understanding. There is some evidence that the use of specific tasks focusing on NOS in university-based sessions may be helping to develop and deepen understanding. However, the impact of current approaches remains fairly limited and attempts to develop teaching practices often face considerable barriers in the school-based practicum.

Conclusions

Graduate science students’ understanding of NOS as they embark on the PGCE is not highly developed. Hence, the emphasis on aspects of NOS in the school curriculum presents a considerable challenge. This study suggests that there is a need to both further develop an explicit focus on NOS in university-based sessions and to develop closer relationships between schools and university faculty in seeking to support developments in classroom practice in this difficult area.