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

Mehdi Kordi  Chris Fullerton  Louis Passfield  Len Parker Simpson 《European Journal of Sport Science》2019,19(2):192-198

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.  相似文献   

Theme issue — The social observation tradition in British educational research     

Len Barton  Martin Lawn 《Interchange》1980,11(4):1-1

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An interview with Geoff Whitty & Michael Worton     

Len Barton  Stephen Rowland 《Teaching in Higher Education》2013,18(4):563-578

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Evaluating an earlybird scheme: encouraging early assignment writing and revising     

Kerrie Unsworth  Katherine Kauter 《高等教育研究与发展》2008,27(1):69-76

It is widely suggested that feedback on assignments is useful to students’ learning, however, little research has examined how this feedback may be provided in large classes or the actual effects of such a scheme. We designed and implemented a voluntary ‘earlybird scheme’ that provided detailed feedback to undergraduate Business students on a first draft of a literature review. We then evaluated the effect of this scheme on students’ final marks for the assignment, the scheme’s usage, and students’ perceptions of the scheme. We found that although the usage of the scheme was quite low, it increased the learning of the students who did use it. The most common reason for not using the scheme was a lack of time and, therefore, given the beneficial nature of the scheme overall, we suggest that future implementations include greater structure or a complementary time‐management workshop.  相似文献   

Making Sociologists Confess     

Martin Lawn  Len Barton 《British Journal of Sociology of Education》1985,6(1):117-121

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Classroom Management and Discipline: An Alternative Model to “Survival” Courses     

Len Cairns 《Asia-Pacific Journal of Teacher Education》1981,9(2):22-28

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

Adrie Visscher  Phil Wild  Debbie Smith  Len Newton 《British journal of educational technology : journal of the Council for Educational Technology》2003,34(3):357-366

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.  相似文献   

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

Kris Magnusson  Len Stewin 《International journal for the advancement of counseling》1990,13(3):205-217

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.  相似文献   

Learning to Teach and Assess Mathematics Using Multimedia: A Teacher Development Project     

Anthony Herrington  Jan Herrington  Len Sparrow  Ron Oliver 《Journal of Mathematics Teacher Education》1998,1(1):89-112

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‘WHAT DO YOU EXPECT OF THIS FRIEND?’     

Len Kuffert 《Media History》2013,19(3):303-319

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.  相似文献