Skating start propulsion: three-dimensional kinematic analysis of elite male and female ice hockey players

The forward skating start is a fundamental skill for male and female ice hockey players. However, performance differences by athlete’s sex cannot be fully explained by physiological variables; hence, other factors such as skating technique warrant examination. Therefore, the purpose of this study was to evaluate the body movement kinematics of ice hockey skating starts between elite male and female ice hockey participants. Male (n = 9) and female (n = 10) elite ice hockey players performed five forward skating start accelerations. An 18-camera motion capture system placed on the arena ice surface captured full-body kinematics during the first seven skating start steps within 15 meters. Males’ maximum skating speeds were greater than females. Skating technique sex differences were noted: in particular, females presented ~10° lower hip abduction throughout skating stance as well as ~10° greater knee extension at initial ice stance contact, conspicuously followed by a brief cessation in knee extension at the moment of ice contact, not evident in male skaters. Further study is warranted to explain why these skating technique differences exist in relation to factors such as differences in training, equipment, performance level, and anthropometrics.     

Relationship between foot strike pattern,running speed,and footwear condition in recreational distance runners

Compared to competitive runners, recreational runners appear to be more prone to injuries, which have been associated with foot strike patterns. Surprisingly, only few studies had examined the foot strike patterns outside laboratories. Therefore, this study compared the foot strike patterns in recreational runners at outdoor tracks with previously reported data. We also investigated the relationship between foot strike pattern, speed, and footwear in this cohort. Among 434 recreational runners analysed, 89.6% of them landed with rearfoot strike (RFS). Only 6.9 and 3.5% landed with midfoot and forefoot, respectively. A significant shift towards non-RFS was observed in our cohort, when compared with previously reported data. When speed increased by 1 m/s, the odds of having forefoot strike and midfoot strike relative to RFS increased by 2.3 times and 2.6 times, respectively. Runners were 9.2 times more likely to run with a forefoot strike in minimalists compared to regular running shoes, although 70% of runners in minimalists continued to use a RFS. These findings suggest that foot strike pattern may differ across running conditions and runners should consider these factors in order to mitigate potential injury.     

Education decentralization in Argentina: a ‘global-local conditions of possibility’ approach to state,market, and society change

This research examined the international origins, national intentions, and local interpretations and actions of the most recent education decentralization movement in Argentina. As a mixed-method, multi-level study, the research was framed with the understanding that current reforms like education decentralization must be approached as contemporaneously constituted policies but historically constructed processes. Using historical methods and archival analysis, this research traced the patterns and pressures of the international policy environment in which policies like privatization, deregulation and decentralization have gained much attention. It reviewed Argentina's recent current educational decentralization laws in light of these global trends as well as their national and subnational context. Employing technical, political, and narrative methods of policy analysis, this research examined the degree of correspondence between the laws' international origins and national intentions and the actors' local interpretations and actions of them. Drawing from the ‘analytic narratives’ that resulted from this study, the bulk of this article compares actors' interpretations, re-actions, and en-actions of education decentralization in three provinces of Argentina. By assessing the relationship between the provinces' political, economic, and cultural contexts and the actors' interpretations and actions of education decentralization, the research concludes that both material capacities and symbolic identities affect the outcomes of education decentralization.     

Evaluating carrascolendas: A television series for Mexican‐American children

Readers with young children may have noticed the occasional Spanish language vignettes appearing from time to time on Sesame Street, the popular public television program for pre‐schoolers. The following article describes the development and audience impact of a program designed to reach a Spanish‐American audience in a Texas city. The study is presented primarily as a guide for other programmers desiring to evaluate audience effects of such content. This article is a summary of a longer report done under an Office of Education subcontract to the Center for Communication Research at the University of Texas. Dr. Williams is Director of the Center and professor in the school of communications, while Diana Natalicio is now an assistant professor of linguistics at the University of Texas at El Paso after having completed her doctorate in linguistics at the Austin campus in 1970.