Finite element modelling and experimental study of oblique soccer ball bounce     

Rezaei A  Verhelst R  Van Paepegem W  Degrieck J 《Journal of sports sciences》2011,29(11):1201-1213

In this study, we develop a finite element model to examine the oblique soccer ball bounce. A careful simulation of the interaction between the ball membrane and air pressure in the ball makes the model more realistic than analytical models, and helps us to conduct an accurate study on the effect of different parameters on a bouncing ball. This finite element model includes a surface-based fluid cavity to model the mechanical response between the ball carcass and the internal air of the ball. An experimental set-up was devised to study the bounce of the ball in game-relevant impact conditions. Ball speed, angle, and spin were measured before and after the bounce, as well as ball deformation and the forces during the impact. The finite element model has been validated with three different sets of data, and the results demonstrate that the finite element model reported here is a valuable tool for the study of ball bounce. After validation of the model, the effect of the friction coefficient on soccer ball bounce was studied numerically. Simulation results show that increasing the friction coefficient may result in reversal of the horizontal impact force.  相似文献   

Correction to: The State of Current Reading Intervention Research for English Learners in Grades K–2: a Best-Evidence Synthesis     

Roberts  Garrett J.  Hall  Colby  Cho  Eunsoo  Coté  Brooke  Lee  Jihyun  Qi  Bingxin  Van Ooyik  Jacklyn 《Educational Psychology Review》2022,34(1):473-473

Educational Psychology Review -  相似文献   

The State of Current Reading Intervention Research for English Learners in Grades K–2: a Best-Evidence Synthesis     

Roberts  Garrett J.  Hall  Colby  Cho  Eunsoo  Cot&#;  Brooke  Lee  Jihyun  Qi  Bingxin  Van Ooyik  Jacklyn 《Educational Psychology Review》2022,34(1):335-361

Educational Psychology Review - This best-evidence synthesis reviews the past 20 years of rigorous reading intervention research to identify effective programs of instruction for Grade K–3...  相似文献   

Does evaluating peer assessment accuracy and taking it into account in calculating assessor’s final score enhance online peer assessment quality?     

Hoang  Loc Phuoc  Le  Hieu Thanh  Van Tran  Hung  Phan  Thanh Chi  Vo  Duc Minh  Le  Phuong Anh  Nguyen  Dung The  Pong-inwong  Chakrit 《Education and Information Technologies》2022,27(3):4007-4035

Education and Information Technologies - Peer assessment has an important role in teaching and learning nowadays. However, the existing techniques tend to be limited due to a lack of a suitable...  相似文献   

The mathematics teacher identity of two early career mathematics teachers and the influence of their working communities on its development     

Arslan  Okan  Haser  Çiğdem  Van Zoest  Laura R. 《Journal of Mathematics Teacher Education》2022,25(4):429-452

Journal of Mathematics Teacher Education - To better understand the critical early years of teaching and teacher identity development, this study explored the mathematics teacher identity of two...  相似文献   

Engaging Students with Integrated STEM Education: a Happy Marriage or a Failed Engagement?     

De Loof  Haydée  Boeve-de Pauw  Jelle  Van Petegem  Peter 《International Journal of Science and Mathematics Education》2022,20(7):1291-1313

International Journal of Science and Mathematics Education - The “leaky pipeline” with regard to students’ engagement in Science, Technology, Engineering, and Mathematics (STEM)...  相似文献   

Taking stock of the UN Decade of education for sustainable development: the policy-making process in Flanders     

Katrien Van Poeck  Joke Vandenabeele  Hans Bruyninckx 《Environmental Education Research》2014,20(5):695-717

In this paper, we address the implementation of the UN Decade of Education for Sustainable Development (ESD) in Flanders, a sub-national entity of Belgium. Our analysis shows how the policy-making process in Flanders is inextricably intertwined with three developments in environmental and educational policy: the increasing impact of ESD policy and discourse on environmental education, the framing of social and political problems as learning problems, and ecological modernisation. These trends give shape to a post-ecologist and post-political policy regime and, thus, affect what is possible and acceptable within Flemish ESD policy. However, this case study also revealed that these developments do not completely determine ESD policy-making in Flanders. Our examination thus allowed us to understand how the actual policy translation in a particular local setting brings about powers that legitimise and maintain as well as counteract the bounds of the policy regime that emerged in the context of the UN Decade.  相似文献   

Motivational factors in discussing sexual health with young people with chronic conditions or disabilities     

Heleen A. Van der Stege  Sander R. Hilberink  Adriaan P. Visser  AnneLoes Van Staa 《Sex education》2014,14(6):635-651

The objective of this study was to identify determinants of professionals’ intention to use the new board game SeCZ TaLK to facilitate sexual health discussions with young people with chronic health conditions and disabilities, and to gauge whether intention led to actual use. A cross-sectional web-based survey of 336 professionals before they received the game sought to measure their intention to use SeCZ TaLK, their attitudes towards discussing sexuality, social professional environment, self-efficacy, opinion on the feasibility of using the game and experience discussing sexuality. Actual use of SeCZ TaLK was assessed at follow-up (N = 105). Professionals with higher self-efficacy and more experience in discussing sexual health were more likely to intend to use the game. At follow-up, intention to use explained 21% of the variance in actual use. SeCZ TaLK fits easily into the daily practice of professionals working in assisted-living and day-care facilities; other professionals experienced greater difficulty integrating the game into their practice. Despite this, SeCZ TaLk was also used across a wide range of settings including in psycho-educational groups, group consultations in hospitals and group therapy in rehabilitation centres. Professionals appreciated the board game SeCZ TaLK, but actual use depended on their own motivation and skills and compatibility with work routines.  相似文献   

Somatotype and longevity of former university athletes and nonathletes     

B R Wilson  H W Olson  H A Sprague  W D Van Huss  H J Montoye 《Research quarterly for exercise and sport》1990,61(1):1-6

A longitudinal study was conducted on 398 athletes and 369 nonathletes who were born before 1920 and attended Michigan State University. The subjects were compared to determine if intercollegiate athletic competition accounts for significant variation in longevity when considered with somatotype. Because some of the subjects were still alive at the time of the study, the BMDP Statistical Software was used to do a survival analysis with covariates. Preliminary comparisons considered the differences in somatotype between athletes and nonathletes. Two sample t-tests indicated that athletes were more mesomorphic and less ectomorphic (p less than .05) than nonathletes. When comparing the relationship between somatotype and longevity, the pooled data of athletes and nonathletes indicated that endomorphs were shorter lived than the other three comparison groups. When only the athletes were considered, similar results were found. However, the nonathlete group exhibited differences only between the mesomorphic and endomorphic groups. The endomorphs were shorter lived. Longevity was examined by using the Cox proportional hazards regression method with somatotype and athlete/nonathlete status as covariates. Somatotype, by itself, was found to be significantly related to longevity, (p less than .001). Athletic status was not significantly related to longevity, either by itself or when entered into the model with somatotype.  相似文献   

Predicting multicultural effectiveness of international students: the Multicultural Personality Questionnaire     

Jan Pieter Van Oudenhoven  Karen I. Van der Zee 《Int J Intercult Relat》2002,26(6)

The present study considered the reliability and validity of the 78-item revised version of the Multicultural Personality Questionnaire, a multidimensional instrument aimed at measuring multicultural effectiveness of expatriate employees and students. The questionnaire includes scales for cultural empathy, open-mindedness, emotional stability, social initiative and flexibility. Participants were native and foreign students of an international business school (N=171) in the Netherlands. The MPQ scales appeared to be more strongly predictive of adjustment of international students as compared to native students. Moreover, the instrument was able to explain variance in students’ adjustment beyond self-efficacy.  相似文献