A user-friendly calibration system for bicycle ergometers, home trainers and bicycle power monitoring devices     

Jean-Marc Drouet  Yvan Champoux  François Bergeron 《Sports Engineering》2008,11(1):15-22

In this study, a new system for the calibration of bicycle ergometers, home trainers and bicycle power monitoring devices is described. This system contains a portable calibration rig as well as a specialised calibration software and is designed for easy and efficient use directly on-site by non-expert personnel. Key features of the calibration rig include a cradle used to implement a torque reaction measurement technique, roller casters, sliding coupling, and crowned splines to facilitate and speed up the calibration process. The maximum power uncertainty delivered by the calibration rig for a nominal power level range of 50–600 W is ±0.9%. A software to guide users through the calibration process and generate calibration charts is described. To illustrate how the calibration system is typically used, the calibration charts of two different brands of home trainers have been obtained, and the power output measurement accuracy of two bicycle power monitoring devices has been determined. Power discrepancies were noted. The results in this study reveal that the calibration system is an effective tool in characterising the behaviour of home trainers.  相似文献   

‘White men can’t jump in a black basketball game?’ An exploratory investigation of implicit strategies of outgroup discrimination     

Rodolphe Perchot  Florent Mangin  Marie-Françoise Lacassagne  Philippe Castel 《Sport in Society》2017,20(11):1644-1666

Examining the ‘natural’ athlete myth and utilizing the recent literature on cultural/social factors in athleticism and basketball, this study through survey research examines the influence of stereotypes on the impression formation of basketball players. The primary research question is to determine from a group of students the attitudes of basketball players in terms of how they evaluate white and black players in basketball. The purpose is to identify participants’ perceptions and their appreciation as to whether or not black are superior to white basketball players. The theoretical framework employed is articulated around the theory of social categorization and racial stereotypes already observed in sports. In an initial qualitative phase, the results show that stereotypical representations exert an influence on the skills associated with basketball players depending on the colour of their skin, which is reflected in the use of adjectives specific to each of the categories of black and white. In a second quantitative phase, whereas a more favourable view of black basketball players might have been attributable to positive discrimination as per the anti-racist norm, the results show the activation of a bias towards favouring one’s own group. Once all of the initial adjectives have been expressed, the targets behave in the expected way in terms of the laws of social categorization i.e. they have a more positive view of the members of their own group (the Whites) than of the other group (the Blacks) as adjectives are cited for describing skills.  相似文献   

Transnational dream,transnational practice: Tracking women students in Asia's knowledge diasporas     

Fran Martin 《Inter-Asia Cultural Studies》2013,14(3):468-475

Since the mid-1980s, there has been a worldwide increase in women travelling on their own to seek educational and career-advancement opportunities, rather than as legal appendages of husbands. In northeast Asia this trend is particularly marked, and the increasing representation of women among the ranks of northeast Asian international students in Western nations can be seen as part of this trend. This essay engages with Youna Kim's book, Transnational Migration, Media and Identity of Asian Women: Diasporic Daughters, and considers Kim's answers to the question: what are the subjective and material experiences of geo-cultural mobility for the current hyper-mobile generation of young northeast Asian women?  相似文献   

Effects of pitch spatial references on players’ positioning and physical performances during football small-sided games     

Diogo Coutinho  Bruno Gonçalves  Bruno Travassos  Eduardo Abade  Del P. Wong  Jaime Sampaio 《Journal of sports sciences》2019,37(7):741-747

The aim of this study was to identify the effects of adding spatial references during football small-sided games in youth players’ tactical and physical performance. Twelve under-15 players performed a Gk+ 6v6+ Gk game under two playing conditions: (i) without spatial references (CONTROL condition); (ii) with spatial references, by dividing equally the pitch into three corridors and three sectors (experimental situation, LINES). Players’ positional data was used to compute time-motion and tactical-related variables. The results revealed that performance under LINES situation increased the regularity in the zones occupied (~14%, Cohen’s d: 0.5; ±0.3; p = 0.003) and in the distance between teammates’ dyads (~19%, 0.9; ±0.2; p < 0.001). Oppositely, LINES condition decreased the longitudinal synchronization of players’ displacements (0.4; ±0.2; p = 0.002), players’ average speed (0.5; ±0.3; p = 0.002) and distance covered at lower (0.9; ±0.3; p < 0.001) and moderate speed (0.5; ±0.3; p < 0.001). Adding spatial references seems to promote a more structured pattern of play and increase positional regularity. However, coaches should be aware that this constraint may decrease the synchronization between players. Overall, these findings may be generalized to most invasion team sports.  相似文献   

National Guidelines for the Performance of the Sweat Test in Diagnosis of Cystic Fibrosis on behalf of the Croatian Society of Medical Biochemistry and Laboratory Medicine and the Cystic Fibrosis Centre - Paediatrics and adults,University Hospital Centre Zagreb     

Jasna Leni ek Krlea  Merica Aralica  Du&#x;ka Tje&#x;i&#x;-Drinkovi&#x;  Karolina Crnekovi&#x;  Jelena Culej  Gordana Fressl Juro&#x;  Verica Horvat  Dara Metzner  Dijana Pamukovi&#x; Jaram  Alma Pipi&#x; Kitter  Fran Smai&#x;  Sanela &#x;imi&#x; Vojak  Livija &#x;imi evi&#x;  Valentina Veri&#x; 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2022,32(1)

The sweat test (ST) is a cornerstone in the diagnosis of cystic fibrosis (CF), together with newborn screening and genetic testing. However, the performance of the ST can depend on the operator’s skill, so several international guidelines have been published to standardise the ST, but inconsistencies remain. The joint Working Group for ST Standardisation (WG STS) of the Croatian Society of Medical Biochemistry and Laboratory Medicine, in association with cistic fybrosis health professional and the Cistic Fibrosis Centre for Paediatrics and Adults, have issued National Guidelines for the Performance of the Sweat Test in order to ensure consistency in ST performance and accuracy of reported results. Many of the standards were taken from the 2nd Edition of the UK Guidelines for Performance of the ST for the Diagnosis of CF, while others were taken from independent consensus statements from the WG STS based on local ST equipment and practices. The standards cover every step of the ST, from the indications for testing to reporting of results and their interpretation, including the analytical phase and quality control. In addition, National Guidelines include appendices with practical examples in order to aid implementation of the recommendations in routine practice.  相似文献   

AMS radiocarbon dating and scientific examination of high historical value manuscripts: Application to two Chinese manuscripts from Dunhuang     

Pascale Richardin  Franoise Cuisance  Nathalie Buisson  Victoria Asensi-Amoros  Catherine Lavier 《Journal of Cultural Heritage》2010,11(4):176-403

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Instruction in basic concepts and first-grade achievement     

Fran Moers  Jerry Harris 《Psychology in the schools》1978,15(1):84-86

First-grade students were administered the Boehm Test of Basic Concepts (BTBC), then given 15 weeks of instruction relevant to the concepts for which corresponding BTBC items were most frequently missed. Improvements in mid-year and end-of-year BTBC performance did not occur as a function of instruction, but a significant treatment effect did occur on a transfer measure, the Stanford Achievement Test. Results are discussed in terms of the sensitivity of the BTBC, possible nonlinguistic effects of the instructional program, and the practical significance of the treatment effect.  相似文献   

Dynamics of GeoGebra ecosystem in mathematics education     

Gökçe  Semirhan  Güner  Pınar 《Education and Information Technologies》2022,27(4):5301-5323

Education and Information Technologies - The purpose of this study was to investigate the trends of GeoGebra related studies. We focused on the articles published between 2009 and 2021 and existed...  相似文献   

The effectiveness of web-based Mathematics instruction (WBMI) on K-16 students’ mathematics learning: a meta-analytic research     

Akın  Ayça 《Education and Information Technologies》2022,27(6):8015-8040

Education and Information Technologies - Given the increasing prevalence of web technology, web-based mathematics environments have been increasingly widely used in mathematics education for the...  相似文献