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231.
Chris Connaboy Simon Coleman Ross H. Sanders 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(4):360-380
Undulatory underwater swimming (UUS) occurs in the starts and turns of three of the four competitive swimming strokes and plays a significant role in overall swimming performance. The majority of research examining UUS is comparative in nature, dominated by studies comparing aquatic animals' undulatory locomotion with the UUS performance of humans. More recently, research directly examining human forms of UUS have been undertaken, providing further insight into the factors which influence swimming velocity and efficiency. This paper reviews studies which have examined the hydromechanical, biomechanical, and coordination aspects of UUS performance in both animals and humans. The present work provides a comprehensive evaluation of the key factors which combine to influence UUS performance examining (1) the role of end-effector frequency and body amplitudes in the production of a propulsive waveform, (2) the effects of morphology on the wavelength of the propulsive waveform and its subsequent impact on the mode of UUS adopted, and (3) the interactions of the undulatory movements to simultaneously optimise propulsive impulse whilst minimising the active drag experienced. In conclusion, the review recommends that further research is required to fully appreciate the complexity of UUS and examine how humans can further optimise performance. 相似文献
232.
233.
Tarah Temen Nadia Jaramillo Cherrez Shannon Coleman 《Journal of Food Science Education》2020,19(3):173-182
Understanding safe food practice is important for home‐based food operators to prevent foodborne illness. Earlier work has found that home‐based food operators lack food safety knowledge and may benefit from training that is specifically tailored to their needs. Unfortunately, home‐based food operators may be deterred from enrolling in traditional educational formats due to their busy schedules. The objective of this study was to pilot and evaluate the effectiveness of an online food safety education module for home‐based food operators in Iowa through three learning assessments. Twenty‐one participants enrolled in a blended workshop in which participants completed one online module before attending a face‐to‐face session where they completed the remaining five modules. The effectiveness of the online module was measured by examining the first‐attempt average scores on learning assessments, the number of assessment attempts required to achieve 100%, and the first‐attempt performance by question type. The three learning assessment tools resulted in first‐attempt averages of approximately 86%, 90%, and 83%, surpassing our standard of effectiveness of 75% and showing good potential for the online format. The learning assessment attempt numbers of 4.65, 1.67, and 3.81 showed difficulty with knowledge transfer for some topics. Comprehension and analysis‐style questions had first‐attempt success rates of approximately 85% and 88%, respectively. Scores on knowledge and application‐style questions were lower with first‐attempt success rates of approximately 80% and 75%, respectively. These findings were used to improve the first online module and guide the transition of the remaining five modules to the online format. 相似文献
234.
The improvement of staff utilization practices through the technique of differentiated staffing is the subject of this paper. The authors bring together the various definitions of the term differentiated staffing and propose a more inclusive definition. Drawing from the literature in organizational change, the authors document in a logical and systematic manner the parameters of differentiated staffing and the problems that are likely to be associated with its introduction. The major part of the paper analyzes the potential of differentiated staffing for improving many deficiencies that are apparent in present methods of utilizing professional personnel in the public schools and in the decision-making procedures of those organizations. The authours urge controlled and systematic pilot projects be undertaken before largescale or even system-wide adoption.
The authors wish to express their appreciation to the following for their helpful criticisms of an earlier draft of this paper: Dr. John Brubacher, Dept. of Educational Administration, University of Connecticut, Storrs; Dr. Walter J. Hartrick, Centre for the Study of Education Administration, The University of British Columbia, Vancouver; Dr. James L. Olivero, The Southwestern Cooperative Educational Laboratory, Albuquerque, New Mexico; Dr. Philip J. Runkel, Center for the Advanced Study of Educational Administration, University of Oregon, Eugene. 相似文献
Résumé Le sujet de cette étude porte sur l'amélioration des méthodes d'utilisation du personnel au moyen de la technique de la différenciation du personnel. Les auteurs regroupent les diverses définitions de l'expression différenciation du personnel et proposent une définition plus globale. En s'inspirant des documents relatifs aux changements structuraux en matière d'organisation, les auteurs appuient sur des documents, d'une manière logique et systématique, leur idée des paramètres de la différenciation du personnel et des problèmes qui vraisemblablement accompagneront sa mise en application. Cette étude est consacrée principalement à l'analyse des possibilités qu'offre la différenciation du personnel en vue d'améliorer les nombreuses lacunes que l'on constate à l'égard des méthodes actuelles d'utilisation du personnel qualifié dans les écoles publiques et au niveau des méthodes de prise de décision des ces organismes. Les auteurs préconisent le recours à des projets pilotes méthodiques et bien dirigés avant que cette nouvelle technique soit adoptée sur une vaste échelle ou même à celle du système.
The authors wish to express their appreciation to the following for their helpful criticisms of an earlier draft of this paper: Dr. John Brubacher, Dept. of Educational Administration, University of Connecticut, Storrs; Dr. Walter J. Hartrick, Centre for the Study of Education Administration, The University of British Columbia, Vancouver; Dr. James L. Olivero, The Southwestern Cooperative Educational Laboratory, Albuquerque, New Mexico; Dr. Philip J. Runkel, Center for the Advanced Study of Educational Administration, University of Oregon, Eugene. 相似文献
235.
Training designed to enhance facilitative communication between teachers and students is becoming an increasingly important element of teacher training programs. The purpose of this investigation was to examine the effect of facilitative communication training on the quality of teacher response to various student problems and to the accompanying emotional states of anger, joy, or depression. The subjects consisted of 64 undergraduate teacher education majors who responded in writing to 15 audiotaped stimulus vignettes. A 5×3×2 repeated measures analysis of variance was used to measure the effects of problem situation, emotional state, and training on empathic understanding. The results indicated significant differences between trained and untrained groups, as well as differences in quality of response due to emotion, with joy eliciting greater empathy than depression or anger. Significant interactions among the variables also were obtained. Implications are discussed in terms of human relations training for teachers. 相似文献