A new justification of induction     

Nielsen  Michael 《Metascience》2020,29(2):209-210

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The role of community in the development of elite handball and football players in Denmark     

N. N. Rossing  A. B. Nielsen  A.-M. Elbe  D. S. Karbing 《European Journal of Sport Science》2016,16(2):237-245

The primary purpose of this study was to investigate the effect of the place of early development in a sample of Danish male elite and youth handball and football players. The sample included 366 handball and football players from the elite Danish league in the season 2011–2012 and a comparison sample of youth players under the age of 12 from 2003, including 147,221 football and 26,290 handball players. Odds ratio analysis showed that both population size and density significantly affected the proportional number of youth players per community and the odds of athletes reaching an elite level in football and handball. The odds for youth player registrations in both handball and football increased in rural in contrast to urban communities. However, elite football players primarily came from communities of high density (>1000 pop./km²), whereas elite handball players primarily came from less densely populated communities (100 to <250 pop./km²). Furthermore, there seems to be a relation between representation of elite and talent clubs in different communities and the probability of becoming an elite player in both sports. The limited number of elite players in both sports from rural communities may be due to national talent development strategies that do not incorporate development support for clubs in rural areas. Additionally, the results of the study clearly suggest the need to include the youth player population to advance research findings in birthplace effect studies.  相似文献   

Book Review     

Brett Nielsen  Steve Badgley  Sharon Hay  Peter Nayler  Daryl Whitney  Mark Sheridan 《Education and Information Technologies》2000,5(2):143-145

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Slowmation: Preservice elementary teachers representing science knowledge through creating multimodal digital animations     

Garry Hoban  John Loughran  Wendy Nielsen 《科学教学研究杂志》2011,48(9):985-1009

Research has identified the value of learners using technology to construct their own representations of science concepts. In this study, we investigate how learners, such as preservice elementary teachers, design and make a narrated animation to represent their science knowledge. The type of animation exemplified is called a “Slowmation” (abbreviated from “Slow Animation”), which is a simplified way for preservice teachers to make an animation that integrates features from claymation, object animation, and digital storytelling. Drawing on semiotic theory, a case study of three preservice elementary teachers, who were audio and video recorded as they created a slowmation, illustrates how the construction process enabled them to engage with a science concept in multiple ways. Findings suggest that when preservice teachers create a slowmation, they design and make a sequence of five representations, each being a semiotic system with particular affordances that link as a semiotic progression: (i) research notes; (ii) storyboard; (iii) models; and (iv) digital photographs, which culminate in (v) a narrated animation. In this study, the authors present their theoretical framework, explain how the preservice teachers created a slowmation using a sequence of representations to show their science knowledge and discuss the implications of these findings for learners in universities and schools. © 2011 Wiley Periodicals, Inc. J Res Sci Teach 48: 985–1009, 2011  相似文献   

Children’s informal learning in the context of schools of the knowledge society     

Birgitte Holm S?rensen  Oluf Danielsen  Janni Nielsen 《Education and Information Technologies》2007,12(1):17-27

This paper builds on a key finding of a 5-year Danish research project con-cerning children in the 7 to 15 age group: children’s principal use of computers and the internet takes place in their spare time, and it is during their spare time that the majority of children really learn how to use interactive media. The project shows that in children’s spare-time use of ICT they employ informal forms of learning based to a large extent on their social interaction both in physical and virtual spaces. These informal learning forms can be identified as learning hierarchies, learning communities and learning networks; they are important contributions to the school of the knowledge society. The ICT in New Learning Environments project based on anthropologically inspired methods and social learning theories shows that students bring their informal forms of learning into the school context. This happens particularly when the school has undergone physical alterations and when its organisation of learning and teaching are also restructured, with project-based learning becoming an important part of the school work and with the media available in the learning environment. Using organisation theory, the school working with ICT and project-based learning is shown to simultaneously constitute a mixed mode between the school of the industrial and the knowledge society. The research shows that it is possible to tip the balance in the direction of the school of the knowledge society, and thus of the future, by comprehensively using ICT and project work in the day-to-day activities of the school, alongside and integrated with the traditional forms of learning, and not least by employing the informal learning processes children develop outside school. For teachers this will mean an extension of their function: no longer merely communicators of knowledge, they will have to become knowledge managers and overall leaders of projects, and this entails much more dialogue with the pupils.

Janni NielsenEmail:

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Modular microfluidic system as a model of cystic fibrosis airways     

M. Skolimowski  M. Weiss Nielsen  F. Abeille  P. Skafte-Pedersen  D. Sabourin  A. Fercher  D. Papkovsky  S. Molin  R. Taboryski  C. Sternberg  M. Dufva  O. Geschke  J. Emnéus 《Biomicrofluidics》2012,6(3)

A modular microfluidic airways model system that can simulate the changes in oxygen tension in different compartments of the cystic fibrosis (CF) airways was designed, developed, and tested. The fully reconfigurable system composed of modules with different functionalities: multichannel peristaltic pumps, bubble traps, gas exchange chip, and cell culture chambers. We have successfully applied this system for studying the antibiotic therapy of Pseudomonas aeruginosa, the bacteria mainly responsible for morbidity and mortality in cystic fibrosis, in different oxygen environments. Furthermore, we have mimicked the bacterial reinoculation of the aerobic compartments (lower respiratory tract) from the anaerobic compartments (cystic fibrosis sinuses) following an antibiotic treatment. This effect is hypothesised as the one on the main reasons for recurrent lung infections in cystic fibrosis patients.  相似文献   

Renal lactate elimination is maintained during moderate exercise in humans     

Volianitis S  Dawson EA  Dalsgaard M  Yoshiga C  Clemmesen J  Secher NH  Olsen N  Nielsen HB 《Journal of sports sciences》2012,30(2):149-153

Reduced hepatic lactate elimination initiates blood lactate accumulation during incremental exercise. In this study, we wished to determine whether renal lactate elimination contributes to the initiation of blood lactate accumulation. The renal arterial-to-venous (a-v) lactate difference was determined in nine men during sodium lactate infusion to enhance the evaluation (0.5 mol x L(-1) at 16 ± 1 mL x min(-1); mean ± s) both at rest and during cycling exercise (heart rate 139 ± 5 beats x min(-1)). The renal release of erythropoietin was used to detect kidney tissue ischaemia. At rest, the a-v O(2) (CaO(2)-CvO(2)) and lactate concentration differences were 0.8 ± 0.2 and 0.02 ± 0.02 mmol x L(-1), respectively. During exercise, arterial lactate and CaO(2)-CvO(2) increased to 7.1 ± 1.1 and 2.6 ± 0.8 mmol x L(-1), respectively (P < 0.05), indicating a -70% reduction of renal blood flow with no significant change in the renal venous erythropoietin concentration (0.8 ± 1.4 U x L(-1)). The a-v lactate concentration difference increased to 0.5 ± 0.8 mmol x L(-1), indicating similar lactate elimination as at rest. In conclusion, a -70% reduction in renal blood flow does not provoke critical renal ischaemia, and renal lactate elimination is maintained. Thus, kidney lactate elimination is unlikely to contribute to the initial blood lactate accumulation during progressive exercise.  相似文献   

Empowering Communities for Improved Educational Outcomes: Some Evaluation Findings from the World Bank     

H. Dean Nielsen 《Prospects》2007,37(1):81-93

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The impact of physical growth and relative age effect on assessment in physical education     

Terje Dalen  Rolf Petter Ingvaldsen  Truls Valland Roaas  Arve Vorland Pedersen  Ingebrigt Steen  Tore Kristian Aune 《European Journal of Sport Science》2017,17(4):482-487

Physical education (PE) is perhaps the school subject most likely to produce relative age effects (RAE). Like in sports, physical maturity gives students an advantage in PE, which might well be mistaken for superior ability. The aim of the present study is to investigate the extent to which physical growth, measured as height, and RAE reflect the assessment in Norwegian PE. Furthermore, we wanted to examine whether there is any gender differences in the assessment in PE as a function of physical growth and RAE. The participants (n?=?2978) were pupils in the last three years of secondary school (13–16 years old). A custom-made questionnaire was designed to collect the necessary data. The correlations between height and mark in PE for boys in 8th, 9th, and 10th grades are respectively r?=?0.14, r?=?0.32, and r?=?0.29. For girls, the correlations are r?=?0.11, r?=?0.33, and r?=?0.21. All correlations are significant (p?<?.05). The number of pupils achieving top marks was 114 in the first half of the year, whereas it was 65 in the second half of the year. The present study showed that physical growth has an impact on the pupils’ PE attainment. The physical growth is of course also mediated by the pupils’ age. RAEs were found in PE attainments also in the Norwegian school system for both genders, despite all the intentions expressed in the PE curriculum.  相似文献   

Primary and secondary cosmic rays,showers and bursts     

W.M. Nielsen 《Journal of The Franklin Institute》1938,226(5):628-630

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