A multi-sensor system for automatic analysis of classical cross-country skiing techniques     

Trine M. Seeberg  Johannes Tjønnås  Ole Marius Hoel Rindal  Pål Haugnes  Steffen Dalgard  Øyvind Sandbakk 《Sports Engineering》2017,20(4):313-327

Commercial systems utilizing data from inertial measurement units (IMUs) to analyse movement patterns have not yet been adapted to monitor daily training in cross-country (XC) skiing. The main purposes of this study are to investigate: (1) the feasibility and potential of a multi-sensor system consisting of a heart rate sensor, global navigation satellite systems (GNSSs) data and seven IMUs placed at multiple locations on the body for outdoor XC skiing, and (2) the validity of employing hard decision rules based on the correlation between arms and legs for detecting sub-techniques in classical XC skiing. All sensor data were synchronously sampled and synchronized with GNSS data from a commercially available sports watch while XC skiing on varying tracks, from amateur skiers and world-class athletes. An algorithm based on the correlation of the angular velocity of arms and legs was developed to detect the three main classic sub-techniques, diagonal, double poling with a kick and double poling. Other sub-techniques were classified as miscellaneous (0–20%). The system is shown to work well outdoors on snow during different conditions, and the implemented algorithm was validated by video analyses to detect the three sub-techniques with a sensitivity of 99–100%. This study is the first to detect and link sub-techniques in XC skiing to GNSS data, thereby associating the detection and distribution of sub-techniques to different terrains. Such information gives insight into the technical and tactical aspects of skiers’ daily training and competitions, thereby providing a tool for coaches and athletes.  相似文献   

Famili?re Tumorerkrankungen     

Katharina Wimmer  Stefanie Kalb  Peter Schütz  Johannes Zschocke 《Wiener klinische Wochenschrift Education》2010,5(2):73-94

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Social position of special needs pupils in the classroom: a comparison between German special schools for pupils with learning difficulties and integrated primary school classes     

Johannes Mand 《欧洲特需教育杂志》2013,28(1):7-14

The rejection of pupils with behaviour problems is a serious problem for inclusive education schools. Sometimes parents prefer special schools because they do not want their children to become outsiders in integration classes. Are they right? The study presented here surveys children with behaviour problems in integrated primary school classes and in special education schools. The main focus is the extent to which behaviour problems influence social relations within the classes. The findings indicate that German pupils with behaviour problems are not well liked. The comparison of special education classes and integrated primary school classes also shows, however, that this is not solely a feature of integrated classes. Pupils with behaviour problems are disliked in both systems, and to a comparable degree. This means that there may be some good arguments for special schools. But both systems—special schools and integrated school classes—have outsiders. Especially parents of pupils with learning difficulties and behaviour problems should know that there is no difference here between special education classes and integrative primary school classes.  相似文献   

Workplace changes and workplace learning: advantages of an educational micro perspective     

Johannes Bauer 《International Journal of Lifelong Education》2013,32(6):675-688

This paper analyses two perspectives, a macro and a micro perspective, on changes in the workplace in relation to workplace learning. It critically evaluates what kind of phenomena both perspectives can account for. Research from a macro perspective focuses on changes in economy or on organisational change. It helps to explore the role of lifelong learning and workplace learning in society as well as to define required competences in different professions. Research from a micro perspective focuses on individual reactions to changes in one’s own workplace. It helps to explain how changes in daily work affect knowledge and skills on the individual or group level. It is argued that the micro perspectives is advantageous if educational goals are pursued which aim at fostering workplace learning and competence development. Examples for empirical research are provided which illustrate the potential of a micro perspective on workplace changes and workplace learning.  相似文献   

Children's media use in Indonesia     

Hendriyani  Ed Hollander  Leen d'Haenens  Johannes W.J. Beentjes 《亚洲交流杂志》2013,23(3):304-319

This article explores how Indonesian children have integrated media into their daily lives: media ownership at home, media uses, and gratifications sought, are discussed, as is the way in which gender and social-status influence the children–media relationship. Survey data of Jakarta-based children aged 9–15 (N=589) reveal that Indonesian children live in a media saturated environment, with high availability of media platforms in their homes and bedrooms. Similar to children in the US and Europe, children in Jakarta spend considerable amounts of time on a wealth of media platforms and experience multiple gratifications from using multiple media. Gender differences persist in that boys tend to be more into gaming, while girls focus more on communication aspects. High social-status children tend to have more media at their disposal in their bedroom, especially electronic games, computers, and Internet connections. Television is still prominent in the media menu of today, but mobile phones are ready to take its place in the near future.  相似文献   

Young children's number sense in Finland,Hong Kong and Singapore     

Pirjo Aunio  Jessie Ee  Swee Eng Audrey Lim  Jarkko Hautamäki  Johannes Van Luit 《International Journal of Early Years Education》2004,12(3):195-216

This study examines young children's number sense in subjects from Finland (n=254), Hong Kong (n=246), and Singapore (n=130). Chinese, English and Finnish versions of the Early Numeracy Test (ENT; Van Luit et al., 1994) were used. Two highly correlated aspects of number sense were measured, one reflecting children's abilities to organize and compare quantities (i.e. relational skills), and the other pertaining to their ability to operate with number-word sequence (i.e. counting skills). The results showed significant age-related gain on the relational and counting scales. No gender or language differences were found. The children in Hong Kong and Singapore outperformed those in Finland in relational and counting tasks starting at the age of four years. The children in Singapore also had better relational and counting skills than those in Hong Kong. Differences in teaching were assumed to explain the findings.  相似文献   

The Electronic Prometheus and its Consequences for Art Education     

Johannes Kirschenmann 《The International Journal of Art & Design Education》2001,20(1):11-18

This paper consists of three parts. First, a discussion of certain aspects of media art pedagogy, secondly, comments on computers from the view of art pedagogy, and finally, thoughts on a future art and media pedagogy.  相似文献   

‘Where is the post‐modern truth we have lost in reductionist knowledge?’ A curriculum’s epitaph     

Johannes A. Slabbert  Annemarie Hattingh 《课程研究杂志》2013,45(6):701-718

This essay suggests a way for creating a curriculum for the future amidst the challenges of post‐modern uncertainty. Curriculum discourse in the past has been dominated by widely‐accepted key questions, which produce and maintain curricula that are essentially fragmented and reductionistic, and directly opposed to the essential demands of the holistic nature of life. The essay proposes a contemporary curriculum philosophy that is fundamentally heuristic, with a radically eclectic, contingent character.  相似文献   

Neutrophil CD64 as a sepsis biomarker     

Hoffmann JJ 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2011,21(3):282-290

Neutrophilic granulocytes express their Fcgamma receptor, also known as the CD64 antigen, predominantly when they are activated. This makes neutrophil CD64 a potential biomarker for infection and sepsis. Indeed there is ample literature on the diagnostic utility of neutrophil CD64 in a variety of diseases. This review summarizes the literature on its application as a sepsis biomarker, in adults as well as in neonates and infants. The available data indicate that neutrophil CD64 seems to have high sensitivity (86%) and specificity (87%), but the methodological quality of most studies is questionable. Nevertheless, neutrophil CD64 appears to be a better diagnostic test than traditional hematological assays, C-reactive protein and probably even procalcitonin. Application of neutrophil CD64 in other conditions than sepsis is briefly presented. Finally, future clinical studies are discussed which are needed in order to confirm the diagnostic performance of this promising biomarker.  相似文献   

Teacher noticing and its growth toward expertise: an expert–novice comparison with pre-service and in-service secondary mathematics teachers     

Bastian  Anton  Kaiser  Gabriele  Meyer  Dennis  Schwarz  Bj&#;rn  K&#;nig  Johannes 《Educational Studies in Mathematics》2022,109(2):205-236

Educational Studies in Mathematics - Mathematical modelling competencies have become a prominent construct in research on the teaching and learning of mathematical modelling and its applications in...  相似文献