Determination of a quantitative parameter to evaluate swimming technique based on the maximal tethered swimming test     

Rafael Soncin  Bruno Mezêncio  Jacielle Carolina Ferreira  Sara Andrade Rodrigues  Rudolf Huebner  Julio Cerca Serrão 《Sports biomechanics / International Society of Biomechanics in Sports》2017,16(2):248-257

The aim of this study was to propose a new force parameter, associated with swimmers’ technique and performance. Twelve swimmers performed five repetitions of 25 m sprint crawl and a tethered swimming test with maximal effort. The parameters calculated were: the mean swimming velocity for crawl sprint, the mean propulsive force of the tethered swimming test as well as an oscillation parameter calculated from force fluctuation. The oscillation parameter evaluates the force variation around the mean force during the tethered test as a measure of swimming technique. Two parameters showed significant correlations with swimming velocity: the mean force during the tethered swimming (r = 0.85) and the product of the mean force square root and the oscillation (r = 0.86). However, the intercept coefficient was significantly different from zero only for the mean force, suggesting that although the correlation coefficient of the parameters was similar, part of the mean velocity magnitude that was not associated with the mean force was associated with the product of the mean force square root and the oscillation. Thus, force fluctuation during tethered swimming can be used as a quantitative index of swimmers’ technique.  相似文献   

The nhs and the theatre of inadequacy     

Rudolf Klein 《Higher Education Quarterly》1983,37(3):201-215

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Die systemischen Vaskulitiden     

Rudolf Johannes Puchner 《Wiener klinische Wochenschrift Education》2016,11(1-4):43-62

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Mastery goal orientations and subjective well-being in school among elementary school students: The mediating role of school engagement     

Yi  Hui  Tian  Lili  Huebner  E. Scott 《European Journal of Psychology of Education - EJPE》2020,35(2):429-450

European Journal of Psychology of Education - Based on the self-system model of motivational development, we examined the mediating role of school engagement, including cognitive engagement and...  相似文献   

Smoking, discount rates, and returns to education     

Josef Fersterer  Rudolf Winter-Ebmer   《Economics of Education Review》2003,22(6):561-566

Individual time preference determines schooling enrolment. Moreover, smoking behavior in early ages has been shown to be highly related to time preference rates. Insofar as discount rates are uncorrelated to ability, predicting school enrolment by discount rates can get rid of the ability bias in an earnings regression. Accordingly, we use smoking at age 16 as an instrument for schooling. Doing this for Austrian cross-sectional data, we find no evidence of ability bias in a simple earnings regression; the results are more mixed if family background is also included.  相似文献   

Peer victimization and prosocial experiences and emotional well‐being of middle school students     

Kellie M. Martin  E. Scott Huebner 《Psychology in the schools》2007,44(2):199-208

This study investigated the relationships among different forms of peer victimization and prosocial experiences and early adolescent emotional well‐being. A total of 571 students in grades 6–8 were administered the Positive and Negative Affect Scale–Children, Multidimensional Students' Life Satisfaction Scale, and the Children's Self Experience Questionnaire–Self Report. Females reported more prosocial experiences; males reported more overt and relational victimization. Differential predictors were observed for the emotional well‐being variables of life satisfaction, positive affect, and negative affect in a series of hierarchical multiple regression equations. Overt victimization experiences added significant variance to all three well‐being equations. Relational victimization experiences added significant variance to the negative affect equation. After accounting for overt and relational experiences, prosocial experiences added significant variance to the life satisfaction and positive affect equations. The experience of prosocial peer interactions thus appears to serve as a protective factor with respect to the relationship between victimization and life satisfaction and positive affect for early adolescents. © 2007 Wiley Periodicals, Inc. Psychol Schs 44: 199–208, 2007.  相似文献   

Behavioral problems among children whose mothers are abused by an intimate partner   总被引：7，自引：0，他引：7  

Kernic MA  Wolf ME  Holt VL  McKnight B  Huebner CE  Rivara FP 《Child abuse & neglect》2003,27(11):1231-1246

OBJECTIVES: To determine the association between children's exposure to maternal intimate partner violence (IPV) and behavior problems as measured by the parent report version of the Child Behavior Checklist (CBCL). METHODS: The study population was comprised of 167 2- to 17-year-old children of Seattle women with police-reported or court-reported intimate partner abuse. The CBCL normative population served as the comparison group. Risk of behavior problems was calculated among the exposed children, in the presence and absence of a history of reported child maltreatment, relative to the normative population. Multiple logistic regression served as the primary method of analysis. RESULTS: Children exposed to maternal IPV were more likely to have borderline to clinical level scores on externalizing (i.e., aggressive, delinquent) behavior (RR=1.6, 95% CI: 1.2, 2.1) and total behavioral problems (RR=1.4, 95% CI: 1.1, 1.9) compared to the CBCL normative sample after adjusting for age and sex. Children who were exposed to maternal IPV and were victims of child maltreatment were more likely to receive borderline to clinical level scores on internalizing (i.e., anxious, depressed) behaviors (RR=2.6, 95% CI: 1.5, 3.6), externalizing (i.e., aggressive, delinquent) behaviors (RR=3.0, 95% CI: 1.9, 4.0) and total behavioral problems (RR=2.1, 95% CI: 1.2, 3.2) compared to the CBCL normative sample after adjusting for age and sex. CONCLUSIONS: Exposure to maternal IPV is significantly associated with child behavioral problems both in the presence and absence of co-occurring child maltreatment. Appropriate attention to the mental health of children living in households with IPV is needed.  相似文献   

Bildungsforschung und Bildungstheorie nach PISA – ein schwieriges Verhältnis     

Rudolf Messner 《Zeitschrift für Erziehungswissenschaft》2016,19(1):23-44

With respect to the guiding German-language concept of ?Bildung“ (education) within the context of PISA a fundamental process has taken place in Germany of restructuring and redefining educational goals. Current educational science is determined by this process and by the initiation of empirical educational research leading to serious development projects. In this contribution examples of all of them are presented and analyzed with regard to their fundamental strengths and limitations directed towards an elaborate imagination of universal education within our knowledge society. Based on the analysis of the thus remeasured educational scientific landscape, the question of the relationship between empirical educational research and educational theory does not indicate the expected polarity between educational theory and educational research results. On the contrary there can rather be found a plurality of sometimes competing and partly complementary forms of science of the old and of the new type. Scientists who wish to remain sovereign in the field of post-PISA educational science are required to show a broad competence covering the different form of science in order to open new perspectives of cooperation.  相似文献   

Exploring alternative conceptions from Newtonian dynamics and simple DC circuits: Links between item difficulty and item confidence     

Maja Planinic  William J. Boone  Rudolf Krsnik  Meredith L. Beilfuss 《科学教学研究杂志》2006,43(2):150-171

Croatian 1st‐year and 3rd‐year high‐school students (N = 170) completed a conceptual physics test. Students were evaluated with regard to two physics topics: Newtonian dynamics and simple DC circuits. Students answered test items and also indicated their confidence in each answer. Rasch analysis facilitated the calculation of three linear measures: (a) an item‐difficulty measure based upon all responses, (b) an item‐confidence measure based upon correct student answers, and (c) an item‐confidence measure based upon incorrect student answers. Comparisons were made with regard to item difficulty and item confidence. The results suggest that Newtonian dynamics is a topic with stronger students' alternative conceptions than the topic of DC circuits, which is characterized by much lower students' confidence on both correct and incorrect answers. A systematic and significant difference between mean student confidence on Newtonian dynamics and DC circuits items was found in both student groups. Findings suggest some steps for physics instruction in Croatia as well as areas of further research for those in science education interested in additional techniques of exploring alternative conceptions. © 2005 Wiley Periodicals, Inc. J Res Sci Teach 43: 150–171, 2006  相似文献   

Desiderata for Research into Historical Concepts of Teacher Training: an attempt to update research into the history of teacher training in Germany     

Rudolf W. Keck 《欧洲师范教育杂志》1984,7(1):65-90

Summary A study of the history of teacher training in Germany reveals some fascinating blind spots which have been ignored for decades.

Pedagogical historiography must now liberate itself from Prussian dominance and take a keener interest in the activities which took place away from the better‐known centres of reform.

The basically bipartite teacher training system for a tripartite school system has evolved into contradictory models of integration in the different federal states.

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